A kind of air nail gun hammer end face grinding positioning fixture

Abstract

The present application relates to the technical field of gas nail gun firing pin processing, in particular to a gas nail gun firing pin end face grinding positioning clamp, which comprises a base plate, a plurality of V-shaped placing grooves are formed in the inside of the base plate, a lifting plate is arranged above the base plate, a plurality of pressing plates are arranged below the lifting plate, the pressing plates correspond to the V-shaped placing grooves one by one, the pressing plates and the lifting plate are connected through an adjusting mechanism, a back plate is fixedly connected to the back of the base plate, a supporting plate is fixedly connected to the side of the back plate away from the base plate, a driving mechanism is arranged above the supporting plate, a plurality of parallel V-shaped placing grooves are arranged on the base plate, a plurality of firing pin workpieces can be accommodated at the same time in single clamping, the single-batch processing capacity is significantly improved, a plurality of groups of pressing plates are driven by the lifting plate to be pressed synchronously, multi-station synchronous clamping and dismounting are realized, the workpiece clamping turnover time is effectively shortened, and the production capacity demand of batch production is adapted.

Description

Technical Field

[0001] This invention relates to the field of pneumatic nail gun firing pin processing technology, specifically to a grinding and positioning fixture for the end face of a pneumatic nail gun firing pin. Background Technology

[0002] Pneumatic nail guns are commonly used equipment in the field of pneumatic fastening, and are widely used in woodworking, building decoration, hardware assembly, and other scenarios. The firing pin, as the core component inside the pneumatic nail gun that fires the nail, has its end face flatness, surface finish, and axial perpendicularity directly affecting the stability of the firing force, the nail assembly accuracy, and the overall service life of the equipment. Therefore, end face grinding is a crucial finishing process in the firing pin production process, and the clamping accuracy, clamping efficiency, and adaptability of the positioning fixture directly determine the machining quality and production efficiency of the firing pin end face.

[0003] Currently, most positioning fixtures for grinding the end face of firing pins adopt a single-station clamping structure, which can only clamp one firing pin workpiece at a time. This makes it impossible to process multiple firing pins of different models at the same time, resulting in low processing turnover efficiency and difficulty in meeting the capacity requirements of large-scale mass production.

[0004] Therefore, the present invention provides a grinding and positioning fixture for the end face of the firing pin of a pneumatic nail gun to solve the above problems. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides a grinding and positioning fixture for the end face of the firing pin of a pneumatic nail gun, so as to solve the problem that the existing fixtures cannot process multiple firing pins of different models at the same time.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A positioning fixture for grinding the end face of a pneumatic nail gun firing pin includes a base plate. The base plate has multiple V-shaped placement slots inside. A lifting plate is arranged above the base plate, and multiple pressure plates are arranged below the lifting plate, with each pressure plate corresponding to one of the V-shaped placement slots. The pressure plates and the lifting plate are connected by an adjustment mechanism. A back plate is fixedly connected to the back of the base plate, and a support plate is fixedly connected to the side of the back plate away from the base plate. A driving mechanism is arranged above the support plate.

[0007] Preferably, a V-shaped anti-slip pad is fixedly installed inside each of the V-shaped placement slots.

[0008] By adopting the above technical solution, the clamping friction can be increased to prevent the workpiece from shifting during grinding, while avoiding scratches on the workpiece surface by the metal structure, thus ensuring the appearance quality of the workpiece.

[0009] Preferably, a pressure pad is fixedly installed on the bottom surface of each of the pressure plates.

[0010] By adopting the above technical solution, in conjunction with the V-shaped anti-slip pad below, flexible pressing is achieved from above the firing pin, further enhancing the pressing friction, while avoiding direct contact between the metal bottom surface of the pressure plate and the workpiece surface to form indentations.

[0011] Preferably, the adjusting mechanism includes a screw threaded inside the lifting plate, one end of which is rotatably mounted inside the pressure plate.

[0012] By adopting the above technical solution, a single pressure plate can be moved up and down relative to the lifting plate through threaded transmission, and the distance between the pressure plate and the V-shaped placement groove at this station can be adjusted individually to adapt to workpieces with different diameters of impact pins.

[0013] Preferably, a first guide post is fixedly connected to the upper surface of the pressure plate, and the other end of the first guide post slides through the lifting plate and extends above the lifting plate.

[0014] By adopting the above technical solution, the lifting and lowering of the pressure plate plays a circumferential limiting and guiding role, ensuring that the pressure plate only moves in the vertical direction and will not rotate synchronously with the screw, thus ensuring the accuracy of the pressing position.

[0015] Preferably, the driving mechanism includes a first upright plate fixedly connected to the upper surface of the support plate, an electric actuator fixedly installed on one side of the first upright plate, the telescopic end of the electric actuator slidingly passing through the first upright plate and fixedly connected to a movable plate, a first wedge plate fixedly connected to the back of the movable plate, a connecting plate fixedly connected to the back of the lifting plate, and a second wedge plate adapted to the first wedge plate fixedly connected to the side of the connecting plate near the movable plate, and the inclined surface of the second wedge plate contacting the inclined surface of the first wedge plate.

[0016] By adopting the above technical solution, the clamping force is amplified through wedge transmission, and the horizontal thrust is converted into vertical pressure. The multi-station clamping synchronization is good, and the transmission is smooth and shock-free.

[0017] Preferably, a spring is fixedly connected to the upper surface of the support plate, and the other end of the spring is fixedly connected to the bottom surface of the connecting plate.

[0018] By adopting the above technical solution, the connecting plate and the lifting plate can be automatically pushed upward to reset after the clamping is released, so that the pressure plate is separated from the workpiece, making it easier to take out the finished product and put in the workpiece to be processed.

[0019] Preferably, a second guide rod is fixedly connected to the upper surface of the support plate, and the other end of the second guide rod slides through the connecting plate and is fixedly connected to a first baffle.

[0020] By adopting the above technical solution, the lifting and lowering movement of the connecting plate is guided to ensure that the lifting plate always remains in a horizontal state, avoids deviation and jamming during the lifting and lowering process, and limits the upper limit position of the connecting plate to prevent the connecting plate from detaching from the second guide rod.

[0021] Preferably, a second upright plate is fixedly connected to the upper surface of the support plate, a third guide rod is fixedly connected to the side of the second upright plate away from the connecting plate, and the other end of the third guide rod slides through the moving plate and is fixedly connected to a second baffle.

[0022] By adopting the above technical solution, the horizontal movement of the moving plate is guided, ensuring that the moving plate moves smoothly along a straight line, avoiding deviation during the movement of the first wedge plate, ensuring the matching accuracy of the wedge transmission, and limiting the maximum movement stroke of the moving plate to prevent the moving plate from detaching from the third guide rod.

[0023] Preferably, a contact sensor is fixedly installed on the side of the second upright plate near the movable plate, and a contact rod corresponding to the contact sensor is fixedly installed on the side of the movable plate near the second upright plate.

[0024] By adopting the above technical solution, the extension stroke of the electric actuator can be precisely controlled, thereby precisely controlling the downward pressure and clamping force of the lifting plate. While ensuring that the firing pin is reliably clamped, it effectively prevents excessive pressure from causing workpiece damage or fixture damage, thus improving the controllability and safety of the clamping process.

[0025] The beneficial effects of this invention are as follows: 1. By setting multiple parallel V-shaped placement slots on the substrate, multiple workpieces with impact pins can be accommodated at the same time in a single clamping, which significantly improves the processing capacity of a single batch. Combined with the lifting plate that lifts the whole body, multiple pressure plates are driven to press synchronously, realizing synchronous clamping and disassembly of multiple stations, effectively shortening the workpiece clamping turnaround time and adapting to the production capacity requirements of mass production. 2. The adjustment mechanism is independently connected to the lifting plate. The initial height of the corresponding pressure plate can be adjusted by turning the screw, which changes the accommodation distance between the pressure plate and the V-shaped placement groove. It can be adapted to different diameter models of impact pin workpieces without the need to change the entire tooling. When processing workpieces of the same model in batches, only one initial adjustment is required for continuous use, which greatly simplifies the operation process of changing the model and broadens the application range of the fixture. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 This is a schematic diagram of the structure of the substrate and back plate of the present invention.

[0028] Figure 3This is a schematic diagram of the lifting plate, screws, and clamping mechanism of the present invention.

[0029] Figure 4 This is a schematic diagram showing the connection between the first wedge plate and the second wedge plate of the present invention.

[0030] Figure 5 This is a schematic diagram of the contact rod and contact sensor of the present invention.

[0031] In the diagram: 1. Base plate; 2. V-shaped placement groove; 3. V-shaped anti-slip pad; 4. Back plate; 5. Support plate; 6. Lifting plate; 7. Screw; 8. Pressure plate; 9. Pressure pad; 10. First guide post; 11. First upright plate; 12. Electric actuator; 13. Moving plate; 14. First wedge plate; 15. Second wedge plate; 16. Connecting plate; 17. Spring; 18. Second guide rod; 19. First baffle; 20. Second upright plate; 21. Third guide rod; 22. Second baffle; 23. Contact rod; 24. Contact sensor. Detailed Implementation

[0032] The following will refer to the attached reference. Figures 1 to 5 The various embodiments of the present invention will be described in detail below. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0033] A positioning fixture for grinding the end face of a pneumatic nail gun firing pin includes a base plate 1. The base plate 1 has multiple V-shaped placement grooves 2 inside. A back plate 4 is fixedly connected to the back of the base plate 1. A support plate 5 is fixedly connected to the side of the back plate 4 away from the base plate 1. A driving mechanism is provided above the support plate 5. The base plate 1 serves as the supporting base of the entire fixture. The multiple V-shaped placement grooves 2 are arranged parallel to each other along the length of the base plate 1, which can simultaneously accommodate multiple firing pin workpieces to be ground. The back plate 4 is set perpendicular to the base plate 1 and can be used to abut and position the firing pins.

[0034] Each V-shaped placement groove 2 is fixedly installed with a V-shaped anti-slip pad 3. The V-shaped anti-slip pad 3 is attached to the two inclined surfaces of the V-shaped placement groove 2 and is made of wear-resistant material with a certain degree of elasticity. It can increase the friction between the outer circle of the ejector pin and the groove body, prevent the workpiece from rotating circumferentially or moving axially during grinding, and avoid direct contact between the ejector pin and the metal groove body, which would cause surface scratches and protect the appearance quality of the workpiece.

[0035] A lifting plate 6 is provided above the substrate 1, and multiple pressure plates 8 are provided below the lifting plate 6. Each pressure plate 8 corresponds to a V-shaped placement groove 2. The pressure plates 8 and the lifting plate 6 are connected by an adjustment mechanism. The lifting plate 6 is a long strip plate that is arranged parallel to the top of the substrate 1 and can be raised and lowered as a whole in the vertical direction. Each pressure plate 8 is directly opposite the center of a V-shaped placement groove 2. When it is raised and lowered synchronously with the lifting plate 6, it can independently apply a clamping force to the impact pin in the groove. The one-to-one correspondence structure ensures the independence and reliability of the clamping at each station.

[0036] Each pressure plate 8 has a pressure pad 9 fixedly installed on its bottom surface. The pressure pad 9 and the V-shaped anti-slip pad 3 below cooperate with each other to achieve flexible pressing from above the ejector pin, further improving the pressing friction, while avoiding the metal bottom surface of the pressure plate 8 from directly contacting the workpiece surface to form an indentation.

[0037] The adjustment mechanism includes a screw 7 threaded inside the lifting plate 6. One end of the screw 7 is rotatably installed inside the pressure plate 8. A first guide post 10 is fixedly connected to the upper surface of the pressure plate 8. The other end of the first guide post 10 slides through the lifting plate 6 and extends above the lifting plate 6. By turning the screw 7, the individual pressure plate 8 can be moved up and down relative to the lifting plate 6 through threaded transmission, thereby adjusting the distance between the pressure plate 8 and the V-shaped placement groove 2 at this station individually, adapting to workpieces with different diameters of firing pins. The first guide post 10 plays a circumferential limiting and guiding role in the lifting and lowering of the pressure plate 8, ensuring that the pressure plate 8 only moves in the vertical direction and does not rotate synchronously with the screw 7, ensuring the accuracy of the clamping position. This adjustment structure only needs to be adjusted once when processing the same type of firing pin in the same V-shaped placement groove 2, and subsequent batch processing does not require repeated operation, effectively simplifying the clamping process.

[0038] The drive mechanism includes a first vertical plate 11 fixedly connected to the upper surface of the support plate 5. An electric actuator 12 is fixedly mounted on one side of the first vertical plate 11. The telescopic end of the electric actuator 12 slides through the first vertical plate 11 and is fixedly connected to a moving plate 13. A first wedge plate 14 is fixedly connected to the back of the moving plate 13. A connecting plate 16 is fixedly connected to the back of the lifting plate 6. A second wedge plate 15, which is adapted to the first wedge plate 14, is fixedly connected to the side of the connecting plate 16 near the moving plate 13, and the inclined surface of the second wedge plate 15 contacts the inclined surface of the first wedge plate 14. The electric actuator 12 outputs a horizontal direction. The driving force drives the moving plate 13 to move back and forth in the horizontal direction, which in turn drives the first wedge plate 14 to move synchronously. The inclined surfaces of the first wedge plate 14 and the second wedge plate 15 are tightly fitted together. When the first wedge plate 14 moves towards the second wedge plate 15, the horizontal thrust is converted into vertical downward pressure through the squeezing action of the inclined surface, pushing the second wedge plate 15 to move downward. Then, the connecting plate 16 drives the lifting plate 6 to press down as a whole, completing the clamping action. The wedge transmission method can amplify the clamping force, and the transmission process is smooth and impact-free, ensuring the synchronicity and uniformity of multi-station clamping.

[0039] A spring 17 and a second guide rod 18 are fixedly connected to the upper surface of the support plate 5. The other end of the spring 17 is fixedly connected to the bottom surface of the connecting plate 16. The other end of the second guide rod 18 slides through the connecting plate 16 and is fixedly connected to a first baffle 19. The spring 17 always applies an upward elastic force to the connecting plate 16. When the electric push rod 12 retracts and the first wedge plate 14 releases the squeezing force, the spring 17 can push the connecting plate 16 and the lifting plate 6 to automatically reset upward, so that the pressure plate 8 is separated from the workpiece, making it easier to take out the finished product and put in the workpiece to be processed. The second guide rod 18 is arranged in the vertical direction to guide the lifting movement of the connecting plate 16, ensuring that the lifting plate 6 always remains in a horizontal state and avoiding deviation and jamming during the lifting process. The first baffle 19 is used to limit the upper limit position of the connecting plate 16 and prevent the connecting plate 16 from separating from the second guide rod 18.

[0040] A second vertical plate 20 is fixedly connected to the upper surface of the support plate 5. A third guide rod 21 is fixedly connected to the side of the second vertical plate 20 near the moving plate 13. The other end of the third guide rod 21 slides through the moving plate 13 and is fixedly connected to a second baffle 22. The second vertical plate 20 is arranged parallel to the first vertical plate 11. The third guide rod 21 is arranged in the horizontal direction and parallel to the extension and retraction direction of the electric push rod 12. It guides the horizontal movement of the moving plate 13, ensuring that the moving plate 13 moves smoothly in a straight line, avoiding skew during the movement of the first wedge plate 14, and ensuring the matching accuracy of the wedge transmission. The second baffle 22 is used to limit the maximum movement stroke of the moving plate 13 and prevent the moving plate 13 from disengaging from the third guide rod 21.

[0041] A contact sensor 24 is fixedly installed on the side of the second upright plate 20 near the moving plate 13. A contact rod 23 corresponding to the contact sensor 24 is fixedly installed on the side of the moving plate 13 near the second upright plate 20. The contact rod 23 moves horizontally synchronously with the moving plate 13. When the moving plate 13 moves to the set clamping position, the end of the contact rod 23 just contacts the contact sensor 24. After the contact sensor 24 triggers a signal, it can control the electric push rod 12 to stop extending, so that the moving plate 13 remains in the current position. This structure can accurately control the extension stroke of the electric push rod 12, and thus accurately control the downward pressure and clamping force of the lifting plate 6. While ensuring that the impact pin is reliably clamped, it effectively prevents excessive pressure from causing workpiece crushing and deformation or fixture damage, and improves the controllability and safety of the clamping process.

[0042] Working principle In use, first, according to the model of the ejector pin to be processed, tighten the screws 7 corresponding to each station to adjust the initial height of the corresponding pressure plate 8 so that the pressure pad 9 on the bottom surface of the pressure plate 8 matches the outer diameter of the ejector pin in the V-shaped placement groove 2. Only one initial adjustment is needed for workpieces of the same model. After the adjustment is completed, put multiple ejector pins into the corresponding V-shaped placement groove 2 and push the ejector pin so that its rear end face presses against the back plate 4 to complete the axial and radial positioning of the workpiece.

[0043] When the electric actuator 12 is activated, its telescopic end extends, pushing the moving plate 13 to move horizontally along the third guide rod 21 toward the second vertical plate 20. The moving plate 13 drives the first wedge plate 14 to move synchronously. The inclined surface of the first wedge plate 14 presses against the inclined surface of the second wedge plate 15, causing the second wedge plate 15 to drive the connecting plate 16 to move downward along the second guide rod 18. This, in turn, drives the lifting plate 6 and all the pressure plates 8 to move downward synchronously. The spring 17 is compressed. When the moving plate 13 moves to the point where the contact rod 23 contacts the contact sensor 24, the contact sensor 24 sends a signal, and the electric actuator 12 stops extending and maintains its current state. At this time, each pressure plate 8 uses the pressure pad 9 to stably press the striker in the corresponding V-shaped placement groove 2, and the grinding of the front end face of the striker can begin.

[0044] After the grinding process is completed, the electric push rod 12 retracts, driving the moving plate 13 and the first wedge plate 14 to move towards the first vertical plate 11. The squeezing force of the first wedge plate 14 on the second wedge plate 15 gradually disappears. Under the elastic force of the spring 17, the connecting plate 16 returns to its original position along the second guide rod 18, driving the lifting plate 6 and all the pressure plates 8 to rise synchronously. The pressure plates 8 detach from the ejector pin workpiece, at which point the processed ejector pin can be taken out and the next batch of workpieces to be processed can be placed in. The above process can be repeated to carry out continuous processing.

[0045] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A grinding and positioning fixture for the end face of a pneumatic nail gun firing pin, comprising a base plate (1), characterized in that: The substrate (1) has multiple V-shaped placement slots (2) inside. A lifting plate (6) is provided above the substrate (1). Multiple pressure plates (8) are provided below the lifting plate (6), and the pressure plates (8) correspond one-to-one with the V-shaped placement slots (2). The pressure plates (8) and the lifting plate (6) are connected by an adjustment mechanism. A back plate (4) is fixedly connected to the back of the substrate (1). A support plate (5) is fixedly connected to the side of the back plate (4) away from the substrate (1). A driving mechanism is provided above the support plate (5).

2. The pneumatic nail gun firing pin end face grinding and positioning fixture according to claim 1, characterized in that: Each of the V-shaped placement slots (2) is fixedly installed with a V-shaped anti-slip pad (3).

3. The pneumatic nail gun firing pin end face grinding and positioning fixture according to claim 1, characterized in that: Each of the pressure plates (8) has a pressure pad (9) fixedly installed on its bottom surface.

4. The pneumatic nail gun firing pin end face grinding and positioning fixture according to claim 1, characterized in that: The adjusting mechanism includes a screw (7) threaded inside the lifting plate (6), one end of which is rotatably mounted inside the pressure plate (8).

5. A grinding and positioning fixture for the firing pin end face of a pneumatic nail gun according to claim 4, characterized in that: The upper surface of the pressure plate (8) is fixedly connected to a first guide post (10), and the other end of the first guide post (10) slides through the lifting plate (6) and extends to the top of the lifting plate (6).

6. A grinding and positioning fixture for the firing pin end face of a pneumatic nail gun according to claim 1, characterized in that: The driving mechanism includes a first upright plate (11) fixedly connected to the upper surface of the support plate (5). An electric push rod (12) is fixedly installed on one side of the first upright plate (11). The telescopic end of the electric push rod (12) slides through the first upright plate (11) and is fixedly connected to a moving plate (13). A first wedge plate (14) is fixedly connected to the back of the moving plate (13). A connecting plate (16) is fixedly connected to the back of the lifting plate (6). A second wedge plate (15) adapted to the first wedge plate (14) is fixedly connected to the side of the connecting plate (16) near the moving plate (13), and the inclined surface of the second wedge plate (15) is in contact with the inclined surface of the first wedge plate (14).

7. A grinding and positioning fixture for the firing pin end face of a pneumatic nail gun according to claim 6, characterized in that: A spring (17) is fixedly connected to the upper surface of the support plate (5), and the other end of the spring (17) is fixedly connected to the bottom surface of the connecting plate (16).

8. A grinding and positioning fixture for the firing pin end face of a pneumatic nail gun according to claim 7, characterized in that: The upper surface of the support plate (5) is fixedly connected to a second guide rod (18), and the other end of the second guide rod (18) slides through the connecting plate (16) and is fixedly connected to a first baffle (19).

9. A grinding and positioning fixture for the firing pin end face of a pneumatic nail gun according to claim 6, characterized in that: The upper surface of the support plate (5) is fixedly connected to a second upright plate (20), and the side of the second upright plate (20) away from the connecting plate (16) is fixedly connected to a third guide rod (21). The other end of the third guide rod (21) slides through the moving plate (13) and is fixedly connected to a second baffle (22).

10. A grinding and positioning fixture for the firing pin end face of a pneumatic nail gun according to claim 9, characterized in that: A contact sensor (24) is fixedly installed on the side of the second upright plate (20) near the moving plate (13), and a contact rod (23) corresponding to the contact sensor (24) is fixedly installed on the side of the moving plate (13) near the second upright plate (20).

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