Four-axis fixed clamp for processing of a nail cutting plate

Abstract

The utility model discloses a four -axis fixed clamp for cutting nail plate processing relates to fixed clamp technical field, including clamp base body, and the clamp base body includes bottom plate and sets up at the bottom plate top surface and can rotate's bearing plate, positioning mechanism, positioning mechanism sets up on the bearing plate, is used for to cutting nail plate carries out the primary positioning and clamping, and it includes at least one positioning base, side abutment plate, bearing block, elastic positioning head, connecting seat and clamping block, through the side abutntment plate, elastic positioning head and clamping block of setting, from cutting nail plate's both sides, one end and bottom simultaneously position, through the hydraulic cylinder no.

Description

Technical Field

[0001] This utility model relates to the field of fixing fixture technology, specifically a four-axis fixing fixture for processing nail cutting boards. Background Technology

[0002] The nail cutter plate is a key component of a pneumatic nail gun. Its main function is to provide a precise guide channel for the nail, ensuring that the nail moves along a predetermined trajectory during firing. The 21° nail cutter plate, due to its specific angle design, is widely used in various types of pneumatic nail guns. This part typically requires multiple machining processes, including milling and drilling, to be formed, and its machining quality directly affects the overall assembly accuracy and performance of the pneumatic nail gun.

[0003] In existing technologies, traditional flat-jaw vises or dedicated two-axis fixtures are commonly used for clamping and fixing when machining nail cutting boards. However, these fixtures have significant limitations: First, they typically only fix the workpiece on a horizontal plane. When machining the side or a specific angle of the nail cutting board, multiple re-clamping and alignment operations are often required. This not only significantly reduces production efficiency but also inevitably introduces cumulative errors due to datum conversion, affecting the machining accuracy of the parts. Second, the clamping force of traditional fixtures acts in a single direction. For nail cutting boards with irregular shapes or complex surfaces, they are prone to slight displacement or vibration when subjected to intermittent cutting force impacts, leading to out-of-tolerance products or even scrap. Therefore, based on the above research and combined with existing technologies, a four-axis fixing fixture for nail cutting board machining is proposed to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a four-axis fixing fixture for nail cutting board processing, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A four-axis fixing fixture for cutting nail plates includes: a fixture base, the fixture base including a base plate and a rotatable bearing plate disposed on the top surface of the base plate;

[0007] A positioning mechanism is disposed on the support plate and is used to initially position and clamp the nail cutting plate. It includes at least one positioning base, a side abutment plate, a support block, an elastic positioning head, a connecting seat and a snap-fit ​​block.

[0008] A clamping mechanism, comprising a first clamping component disposed on the support plate and a second clamping component disposed on the base plate, for clamping the nail cutting plate from different directions.

[0009] Furthermore, in the positioning mechanism, the side abutment plate is fixed to the top surface of the positioning base for abutting against both sides of the nail cutting plate;

[0010] The bearing block is fixed to the top surface of the bearing plate, and the elastic positioning head is fixed to one side of the bearing block for abutting against the left end of the nail cutting plate;

[0011] The connecting seat is slidably connected to the inside of the positioning base, the snap-fit ​​block is fixed to the top surface of the connecting seat and is used to snap into the inside of the cutting nail plate, and the connecting seat is fixed to the top surface of the bearing plate by bolts.

[0012] Furthermore, the first clamping assembly includes a hydraulic cylinder, which is bolted to the top surface of the bearing plate. The top surface of its telescopic shaft is rotatably connected to a pressing positioning plate by a pin. Two support plates are fixedly installed on the top surface of the hydraulic cylinder. The upper end of the support plate is rotatably connected to the side of the pressing positioning plate by a pin, and is used to press down the right end of the cutting nail plate.

[0013] Furthermore, the second pressing assembly includes a hydraulic cylinder two, which is fixedly installed on the top surface of the base plate. The top surface of its telescopic shaft is rotatably connected to a pressing positioning plate two via a pin. Two support plates two are fixedly installed on the top surface of the hydraulic cylinder two. The upper end of the support plate two is rotatably connected to the side of the pressing positioning plate two via a pin, for pressing down the top surface of the cutting nail plate.

[0014] Furthermore, it also includes a drive mechanism for driving the support plate to rotate;

[0015] The drive mechanism includes a reducer bolted to the top surface of the base plate, a transmission rod mounted inside the reducer via a bushing, and a coupling fixedly mounted at one end of the transmission rod;

[0016] A lathe flange is rotatably connected to one side of the reducer, and the lathe flange is connected to a mounting bracket that is bolted to one side of the bearing plate.

[0017] Furthermore, the drive mechanism also includes a bearing seat fixedly installed on the top surface of the support plate. One side of the bearing seat is rotatably connected to a lathe flange second via a bearing. One side of the lathe flange second is connected to a mounting support that is bolted to the other side of the support plate.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. The cutting plate is simultaneously limited from both sides, one end, and the bottom by using side abutment plates, elastic positioning heads, and locking blocks. Hydraulic cylinder one, pressure positioning plate one, hydraulic cylinder two, and pressure positioning plate two work together to apply clamping force from the right end and top surface of the workpiece. This multi-point constraint method, combining positioning surfaces and clamping points, completely restricts the six degrees of freedom of the cutting plate. Even under the constantly changing direction of cutting force in four-axis machining, it effectively prevents any form of workpiece shaking or displacement, ensuring the stability of the machining process and the surface finish, and eliminating part deviations caused by vibration. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the connection structure between the mounting support and the bearing plate of this utility model;

[0022] Figure 3 This is a schematic diagram of the support plate and the connection structure of the support plate of this utility model;

[0023] Figure 4 This is a schematic diagram of the connection structure between the support plate and the lower positioning plate of this utility model.

[0024] Figure 5 This is a schematic diagram of the connection structure between the bearing block and the elastic positioning head of this utility model.

[0025] In the diagram: 1. Base plate; 2. Bearing plate; 3. Mounting support; 4. Reducer; 5. Hydraulic oil tank; 6. Positioning base; 7. Oil inlet pipe; 8. Oil return pipe; 9. Coupling; 10. Transmission rod; 11. Lathe flange one; 12. Bearing housing; 13. Lathe flange two; 14. Hydraulic cylinder one; 15. Support plate one; 16. Pressing positioning plate one; 17. Hydraulic cylinder two; 18. Pressing positioning plate two; 19. Support plate two; 20. Side abutment plate; 21. Bearing block; 22. Elastic positioning head; 23. Connecting seat; 24. Snap-fit ​​block. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] In one typical implementation of this application, please refer to Figures 1-5A four-axis fixing fixture for cutting nail plates includes a base plate 1, which serves as the mounting base for the entire fixture and is fixed to the center of the worktable of a four-axis machine tool through mounting holes thereon. A bearing plate 2 is rotatably mounted on the top surface of the base plate 1.

[0028] Positioning mechanism: This mechanism is arranged on the top surface of the support plate 2 and is used for precise initial positioning of the nail cutting plate. It includes at least one positioning base 6 that is bolted to the top surface of the support plate 2 as a base platform for placing the nail cutting plate.

[0029] The clamping mechanism is used to finally clamp the nail cutting plate that has been initially positioned from different directions. It includes a first clamping component disposed on the top surface of the support plate 2 and a second clamping component disposed on the top surface of the fixed base plate 1.

[0030] During installation, the base plate 1 is first fixed to the machine tool worktable, then the bearing plate 2 and its rotating components are assembled. Subsequently, the various components of the positioning mechanism and the first clamping assembly are installed on the bearing plate 2. Finally, the second clamping assembly is installed on the base plate 1.

[0031] There are two side abutment plates 20, which are fixed vertically and symmetrically to the top surface of the positioning base 6 by screws. The distance between the inner surfaces of the two plates is precisely clearance-fitted with the width of the cutting plate. The bearing block 21 is fixed to the top surface of the bearing plate 2 by bolts and is located on the same side of all positioning bases 6. The elastic positioning head 22 is preferably a spring plunger whose cylinder part is press-fitted into the mounting hole on the side of the bearing block 21 facing the positioning base 6. The connecting seat 23 is slidably embedded in the transverse groove machined inside the positioning base 6. The lower part of the snap-fit ​​block 24 is fixed to the top surface of the connecting seat 23 by screws, and the upper part extends upward through the elongated opening on the top surface of the positioning base 6.

[0032] Preferably, when installing the workpiece, the operator first slides the connecting seat 23 in the groove to initially adjust the lateral distance between the two locking blocks 24, making it roughly aligned with the locking holes on the bottom of the nail cutting plate. Then, the nail cutting plate blank is placed on the positioning base 6, so that its two sides are pressed against the side abutment plates 20 on both sides, and the nail cutting plate is pushed to the left, so that its left end face compresses the elastic positioning head 22 until it can no longer move. At this time, the hole or groove on the bottom of the nail cutting plate is also aligned with the locking block 24 and falls down. Finally, the connecting seat 23 is locked to the bearing plate 2 with bolts to complete all positioning.

[0033] The two side abutment plates 20 and the elastic positioning head 22 together restrict the movement and rotation in the five degrees of freedom X and Y directions in the horizontal plane, while the two locking blocks 24 are embedded from the bottom, restricting the movement in the Z direction and the rotation around the X and Y axes. This multi-positioning mechanism ensures the uniqueness and accuracy of the workpiece on the machining datum, laying the foundation for subsequent clamping and precision machining.

[0034] The cylinder body of hydraulic cylinder 14 is vertically fixed to the top surface of bearing plate 2 by bolts and is located behind positioning base 6. The lower ends of two support plates 15 are welded or fixed to the top sides of the cylinder body of hydraulic cylinder 14 by bolts and extend upwards. The lower positioning plate 16 is located between the two support plates 15. The first pin passes through the through holes at the upper ends of the two support plates 15 and the through hole at the upper part of the lower positioning plate 16, forming a rotating pair. The second pin passes through the U-shaped joint at the top of the telescopic shaft of hydraulic cylinder 14 and the through hole at the lower part of the lower positioning plate 16, forming another rotating pair.

[0035] Preferably, when the hydraulic system supplies oil to the hydraulic cylinder 14, its telescopic shaft extends upward. The telescopic shaft, via a lower pin, pushes the lower part of the pressure positioning plate 16 forward. Due to the constraint of the upper pin, the pressure positioning plate 16 swings downward around the upper pin until its pressure head is firmly pressed against the right end face of the nail cutting plate. When releasing the clamp, the telescopic shaft of the hydraulic cylinder 14 retracts, pulling the pressure positioning plate 16 upward to create operating space, effectively overcoming the overturning moment generated during processing and preventing the right end of the nail cutting plate from tilting up. Simultaneously, the large opening space during the swing operation greatly facilitates the placement and removal of the nail cutting plate, improving clamping efficiency.

[0036] The cylinder body of hydraulic cylinder 2 17 is vertically fixed to the top surface of the fixed base plate 1 by bolts, and its position corresponds to the middle or rear upper part of the workpiece on the bearing plate 2. The lower ends of the two support plates 2 19 are fixed to the top sides of the cylinder body of hydraulic cylinder 2 17. The pressing positioning plate 2 18 is located between the two support plates 2 19; that is, it is rotatably connected to the upper end of the support plate 2 19 and the top end of the telescopic shaft of hydraulic cylinder 2 17 by two pins, respectively.

[0037] Preferably, hydraulic oil enters hydraulic cylinder 17, driving it to extend upwards along its telescopic axis. This pushes the lower positioning plate 18 to swing downwards, ultimately pressing its pressure head against the top surface of the nail cutting plate. This primarily restricts the workpiece's degree of freedom of movement in the Z direction. Working in conjunction with the first clamping assembly, it forms a compound clamping of the nail cutting plate from both the right and top directions. Combined with the positioning mechanism at the bottom, it completely restricts all six degrees of freedom of the nail cutting plate, ensuring that even under cutting force impact during four-axis rotary machining, the nail cutting plate remains absolutely stable without any loosening or vibration.

[0038] A hydraulic oil tank 5 is fixedly installed on the rear side of the reducer 4. An oil inlet pipe 7 and an oil return pipe 8 are fixedly installed on one side of the hydraulic oil tank 5. The hydraulic oil inside the hydraulic oil tank 5 enters the interior of multiple hydraulic cylinders 14 and the lower positioning plate 16 through the oil inlet pipe 7. Then the hydraulic oil will flow back to the interior of the hydraulic oil tank 5 through the pipeline and the oil return pipe 8.

[0039] The reducer 4 is fixed to the left side of the top surface of the base plate 1 by bolts. The transmission rod 10 is supported inside the reducer 4 by bearings and bushings, with one end extending out of the reducer 4 and a coupling 9 fixed by a key connection. The lathe flange 11 is connected to the housing of the reducer 4 by bolts on its outer edge, but its central part is connected to the output shaft of the reducer 4 by bearings and can rotate freely. The mounting bracket 3 located on the left side of the bearing plate 2 is fixedly connected to the central plate surface of the lathe flange 11 by bolts.

[0040] Preferably, the output shaft of the external servo motor is connected to the transmission rod 10 via coupling 9. Power is transmitted to the reducer 4 via the transmission rod 10, and after being reduced in speed and torque by the gear set, its output shaft drives the central part of the lathe flange 11 to rotate, which in turn drives the entire bearing plate 2 to rotate precisely around its central axis via the mounting support 3.

[0041] The reducer 4 ensures sufficient output torque and smooth operation. The lathe flange 11 serves as a standard interface, making the connection between the fixture and the drive unit standardized and reliable, facilitating on-site installation, alignment, and maintenance.

[0042] The bearing housing 12 is bolted to the top surface of the bearing plate 2 and is arranged opposite to the reducer 4 on the drive side. The lathe flange 13 is bolted to the side of the bearing housing 12, and its center plate is rotatably connected to a spindle (not shown) fixed to the bearing housing 12 via a bearing. The mounting bracket 3 located on the right side of the bearing plate 2 is bolted to the center plate of the lathe flange 13.

[0043] Preferably, when the drive side pushes the bearing plate 2 to rotate through the mounting bracket 3, the mounting bracket 3 on the driven side moves accordingly, and drives the center plate of the lathe flange 13 to rotate smoothly in the bearing seat 12, forming a stable driven end. This ensures the stable and high-precision rotation of the bearing plate 2 on the two support points, greatly improving the rigidity and dynamic stability of the entire fixture system. It is a key guarantee for achieving high-precision and high-efficiency four-axis machining.

[0044] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A four-axis fixing fixture for machining nail cutting plates, characterized in that, include: The fixture base includes a base plate (1) and a rotatable support plate (2) disposed on the top surface of the base plate (1); The positioning mechanism is disposed on the bearing plate (2) and is used to initially position and clamp the nail cutting plate. It includes at least one positioning base (6), a side abutment plate (20), a bearing block (21), an elastic positioning head (22), a connecting seat (23), and a snap-fit ​​block (24). The clamping mechanism includes a first clamping component disposed on the bearing plate (2) and a second clamping component disposed on the base plate (1), for clamping the nail cutting plate from different directions.

2. The four-axis fixture for processing a nail plate according to claim 1, wherein In the positioning mechanism, the side abutment plate (20) is fixed to the top surface of the positioning base (6) for abutting against both sides of the nail cutting plate; The bearing block (21) is fixed to the top surface of the bearing plate (2), and the elastic positioning head (22) is fixed to one side of the bearing block (21) for abutting against the left end of the nail cutting plate; The connecting seat (23) is slidably connected to the inside of the positioning base (6), the snap-fit ​​block (24) is fixed to the top surface of the connecting seat (23) and used to snap into the inside of the nail cutting plate, and the connecting seat (23) is fixed to the top surface of the bearing plate (2) by bolts.

3. The four-axis fixture of claim 1, wherein: The first clamping assembly includes a hydraulic cylinder (14), which is bolted to the top surface of the bearing plate (2). The top surface of its telescopic shaft is rotatably connected to a pressing positioning plate (16) via a pin. Two support plates (15) are fixedly installed on the top surface of the hydraulic cylinder (14). The upper end of the support plate (15) is rotatably connected to the side of the pressing positioning plate (16) via a pin, and is used to press down the right end of the nail cutting plate.

4. The four-axis fixture of claim 1, wherein, The second pressing assembly includes a hydraulic cylinder (17), which is fixedly installed on the top surface of the base plate (1). The top surface of its telescopic shaft is rotatably connected to a pressing positioning plate (18) via a pin. Two support plates (19) are fixedly installed on the top surface of the hydraulic cylinder (17). The upper end of the support plate (19) is rotatably connected to the side of the pressing positioning plate (18) via a pin, for pressing down the top surface of the cutting nail plate.

5. The four-axis fixture of claim 1, wherein, It also includes a drive mechanism for driving the support plate (2) to rotate; The drive mechanism includes a reducer (4) bolted to the top surface of the base plate (1), and a transmission rod (10) is installed inside the reducer (4) through a bushing. A coupling (9) is fixedly installed at one end of the transmission rod (10). A lathe flange (11) is rotatably connected to one side of the reducer (4), and the lathe flange (11) is connected to a mounting bracket (3) that is bolted to one side of the bearing plate (2).

6. The four-axis fixture of claim 5, wherein, The drive mechanism also includes a bearing seat (12) fixedly installed on the top surface of the support plate (2). One side of the bearing seat (12) is rotatably connected to a lathe flange (13) via a bearing. One side of the lathe flange (13) is connected to a mounting bracket (3) installed on the other side of the support plate (2) via bolts.

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