Internal tapping device for stainless steel fastener
By designing an automated internal tapping device for stainless steel fasteners, the problems of low efficiency and difficulty in guaranteeing accuracy in traditional methods have been solved, achieving high-precision and high-efficiency tapping operations, and improving safety and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-03-10
AI Technical Summary
Traditional tapping methods for stainless steel fasteners are inefficient, difficult to guarantee accuracy, and pose safety hazards.
A tapping device for stainless steel fasteners was designed, which uses components such as slide rails, sliders, motors, cylinders and hydraulic cylinders to realize automated feeding, clamping and tapping operations of fasteners, ensuring accurate positioning and stable movement.
It improves tapping accuracy and production efficiency, reduces labor intensity, enhances safety, and ensures the shape and dimensional accuracy of the threads.
Smart Images
Figure CN223981280U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of pipe fitting processing equipment, specifically a stainless steel fastener internal tapping device. Background Technology
[0002] In the process of mechanical manufacturing and assembly, internal tapping of stainless steel fasteners is a common and important step. Traditional internal tapping methods mainly rely on manual operation or simple mechanical devices, where a tap is manually screwed into a pre-drilled hole to achieve tapping. However, this method has many drawbacks: First, manual operation is inefficient and labor-intensive, easily leading to worker fatigue; second, the accuracy of manual tapping is difficult to guarantee, easily resulting in uneven threads, broken threads, and other problems, affecting the connection quality of the fasteners; third, manual operation has low safety, as the tap is prone to breakage, causing injury to the operator. Utility Model Content
[0003] This utility model aims to provide an internal tapping device for stainless steel fasteners to solve the problems of low tapping accuracy and slow efficiency in the prior art, thereby improving the processing quality and production efficiency of internal threads in stainless steel fasteners. To achieve the above objective, this application provides the following technical solution: an internal tapping device for stainless steel fasteners, comprising:
[0004] A fixed base is provided, and a workbench is connected to the fixed base. A material discharge chute is provided on the workbench.
[0005] A slide rail is mounted on the fixed base. A slider is slidably connected to the slide rail. A slide plate is connected to the slider. A motor is mounted on the slide plate. A tap is mounted on the motor. The motor drives the tap to rotate.
[0006] A material trough is provided on the workbench, and a guide groove with an outlet facing the material discharge trough is provided thereon;
[0007] A first clamping block is disposed on the side of the discharge chute;
[0008] A guide block is provided on the side of the material discharge chute and opposite to the first clamping block. The guide block is provided with a sliding groove.
[0009] The second clamping block is slidably disposed on the guide block, and a limit plate is provided at its bottom to support the fastener to be tapped;
[0010] A cylinder is connected to the side wall of the second clamping block and drives the second clamping block to slide along the guide block, thereby realizing the cooperation between the second clamping block and the first clamping block to clamp the fastener to be tapped.
[0011] In a preferred embodiment of this technical solution, the guide groove is arc-shaped, and its width is adapted to the height of the fastener to be tapped, allowing the fastener to slide down into the guide groove to the limiting plate.
[0012] In a preferred embodiment of this technical solution, both the first clamping block and the second clamping block have V-shaped clamping surfaces on their opposing surfaces.
[0013] In a preferred embodiment of this technical solution, the vertical distance from the limiting plate to the guide groove outlet is greater than the outer diameter of the fastener to be tapped.
[0014] In a preferred embodiment, this technical solution also includes a hydraulic cylinder, which is mounted on the fixed base and the end of its telescopic rod is connected to the slide plate. The hydraulic cylinder can drive the slide plate to slide along the slide rail, thereby allowing the tap to move closer to or further away from the worktable.
[0015] In a preferred embodiment of this technical solution, the width of the limiting plate is smaller than the outer diameter of the fastener to be tapped.
[0016] In a preferred embodiment, this technical solution further includes a receiving frame, which is located below the workbench and directly opposite the material discharge chute.
[0017] In a preferred embodiment of this technical solution, the axis of the tap coincides with the plane of symmetry of the V-shaped clamping surface.
[0018] Compared with the prior art, the beneficial effects of this application are:
[0019] This invention, through the design of a material feeding trough, a guide trough, and a cooperating structure of a first clamping block and a second clamping block, ensures precise positioning of the fastener to be tapped before processing. After the fastener falls from the guide trough outlet, it enters the limiting block. Driven by a cylinder, the first and second clamping blocks tightly engage, clamping the fastener in a predetermined position, reducing positional deviations during processing and providing a foundation for high-precision tapping. The slide rail and slider provide stable guidance for the tap's movement. When the motor drives the tap to rotate, the tap smoothly approaches the fastener along the slide rail and performs the tapping operation. This stable movement prevents the tap from wobbling or shifting during tapping, ensuring the shape and dimensional accuracy of the thread. This device automates the entire process from fastener feeding and clamping to tapping. Attached Figure Description
[0020] Fig. 1 This is a three-dimensional schematic diagram of an internal tapping device for stainless steel fasteners proposed in the embodiments of this application;
[0021] Fig. 2 This is a three-dimensional schematic diagram from another perspective of a stainless steel fastener internal tapping device proposed in the embodiments of this application;
[0022] In the diagram: 1. Fixed base; 2. Workbench; 3. Material drop chute; 4. Slide rail; 5. Slider; 6. Slide plate; 7. Motor; 8. Tap; 9. Material trough; 10. Guide groove; 11. First clamping block; 12. Guide block; 13. Slide groove; 14. Second clamping block; 15. Limiting plate; 16. Cylinder; 17. V-shaped clamping surface; 18. Hydraulic cylinder; 19. Receiving frame. Detailed Implementation
[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0024] It should be noted that in the description of this application, the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, 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. Therefore, they should not be construed as limitations on this application.
[0025] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale; for example, the thickness or width of some layers may be exaggerated relative to other layers.
[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined or described in one figure, it will not need to be discussed or described in detail in the description of the subsequent figures.
[0027] In order to solve the technical problems in the background art, such as Figs. 1-2 As shown, this application provides a technical solution: an internal tapping device for stainless steel fasteners, characterized as follows:
[0028] The fixed base 1, as the foundation component of the entire device, is made of high-strength metal material, possessing sufficient rigidity and stability to support and fix the entire device. The worktable 2 is connected to the fixed base 1, located on one side of it, and the two are fixed together by welding or bolting. The upper surface of the worktable 2 is flat, used for mounting other components. A material dropper trough 3 is machined on the worktable 2. The material dropper trough 3 is elongated, its length direction aligned with the length direction of the worktable 2. Its width and depth are designed according to the size of the stainless steel fastener to be processed, ensuring that the fastener can fall smoothly and be placed stably, providing an accurate processing position for subsequent tapping operations. The slide rail 4 is mounted on the upper surface of the fixed base 1, its length direction facing the worktable 2. The slide rail 4 uses a high-precision guide rail, possessing good straightness and wear resistance, thus ensuring that the tap 8 moves in a straight line during tapping, improving tapping accuracy. The slider 5 matches the slide rail 4, achieving low-friction sliding. The slider 5 has connecting holes machined on it for connection with the slide plate 6. The slide plate 6 is a rectangular plate structure. Its lower surface is connected to the slider 5 by bolts, and the upper surface is equipped with a motor 7. The motor 7 is fixed to the slide plate 6 by bolts, and its output shaft faces the worktable 2. The tap 8 is mounted on the output shaft of the motor 7, and torque is transmitted through key connections or other means. The motor 7 drives the tap 8 to rotate, providing power for the tapping operation. The cooperation of the slide rail 4, slider 5, and slide plate 6 allows the tap 8 to move smoothly along the length of the fixed base 1 under the drive of the motor 7, realizing the tapping of fasteners in different positions, improving the applicability and flexibility of the device. The material trough 9 is mounted on the worktable 2, has a certain height, and is located on one side of the material drop trough 3. The bottom of the material trough 9 is machined with a guide groove 10, and its outlet faces the inlet of the material drop trough 3. The inner wall of the guide groove 10 is smooth and has a certain guiding accuracy, which can ensure that the fastener slides smoothly along the guide groove 10 towards the material drop trough 3 under the action of gravity, and falls into the limiting plate 15 in the correct posture and position to wait for tapping. The first clamping block 11 is installed on one side of the feed chute 3 and connected to the worktable 2 by bolts. The first clamping block 11 is cuboid in shape, with clamping surfaces machined on its side. The shape of the clamping surfaces matches the side of the fastener to be processed, allowing for a tight fit and clamping effect. This ensures that the fastener will not shift during tapping, guaranteeing the tapping quality. The guide block 12 is installed on the other side of the feed chute 3, opposite to the first clamping block 11, and is also connected to the worktable 2 by bolts. The guide block 12 is also cuboid in shape, with a groove 13 machined on it. This groove provides guidance and support for the movement of the second clamping block 14, ensuring the accuracy and reliability of the clamping action. The second clamping block 14 is also cuboid in shape, with a sliding part at its bottom that matches the groove 13, allowing the second clamping block 14 to slide along the groove 13.The other end of the second clamping block 14 is machined with a clamping surface, the shape of which matches the clamping surface of the first clamping block 11, allowing them to fit tightly together and clamp the fastener. A limiting plate 15 is machined at the bottom of the second clamping block 14. The limiting plate 15 is rectangular, its dimensions designed according to the bottom shape of the fastener to be processed, supporting the fastener and preventing it from falling during clamping, ensuring clamping stability. A cylinder 16 is mounted on the worktable 2, located on one side of the guide block 12, and fixed with bolts. The piston rod of the cylinder 16 is connected to the side wall of the second clamping block 14, either by bolts or through a connector. The action of the cylinder 16 drives the second clamping block 14 to slide along the groove 13 of the guide block 12, realizing the engagement and disengagement of the second clamping block 14 and the first clamping block 11, thereby completing the clamping and releasing operation of the fastener, automating the clamping process, and improving production efficiency and processing accuracy.
[0029] In operation, the fastener to be tapped is placed in the feed trough 9. Under gravity, the fastener falls through the guide groove 10 and enters the limiting plate 15. The cylinder 16 is activated, driving the second clamping block 14 to slide along the slide groove 13, engaging with the first clamping block 11 to clamp the fastener on the limiting plate 15. The motor 7 is activated, driving the tap 8 to rotate, pushing the slide plate 6 to move the tap 8 into the predetermined working position, performing internal tapping on the fastener clamped between the first clamping block 11 and the second clamping block 14. After tapping is completed, the motor 7 is stopped, the slide plate 6 is pulled back, and the motor 7 returns to its initial position. The cylinder 16 reverses its direction, driving the second clamping block 14 to release the fastener, which is then discharged from the feed trough 3 under gravity.
[0030] It should be noted that the guide groove 10 is designed in an arc shape, and its width is precisely matched with the height of the fastener to be tapped. This design allows the fastener to slide smoothly along the arc-shaped trajectory within the guide groove 10 under its own weight until it lands stably on the limiting plate 15 at the bottom of the second clamping block 14. The arc-shaped guide groove 10 not only provides a stable sliding path for the fastener, reducing shaking and jamming during the feeding process, but also ensures that the fastener is held in the correct posture and position by the limiting plate 15. This provides more accurate and reliable initial conditions for subsequent clamping and tapping operations, further improving tapping accuracy and production efficiency.
[0031] Furthermore, both the first clamping block 11 and the second clamping block 14 have V-shaped clamping surfaces 17 on their opposing surfaces. This V-shaped clamping surface 17 design allows it to fit tightly against the outer circumference of the stainless steel fastener, forming a stable support point. This ensures the fastener is more firmly fixed during clamping, preventing rotation or displacement during tapping. When the cylinder 16 drives the second clamping block 14 closer to the first clamping block 11, the two V-shaped clamping surfaces 17 work together to tightly clamp the fastener in the middle, ensuring its stability during tapping and thus improving the machining accuracy and quality of the internal thread. Simultaneously, the V-shaped clamping surface 17 provides centering, making it suitable for fasteners of various diameters, exhibiting good versatility and adaptability, and enhancing the flexibility and practicality of the device.
[0032] It should be noted that the vertical distance from the limiting plate 15 to the outlet of the guide groove 10 is greater than the outer diameter of the fastener to be tapped. When the fastener slides down the arc-shaped guide groove 10, due to the arc design of the guide groove 10, the fastener will naturally roll to the outlet of the guide groove 10 under the action of gravity. At this time, the larger vertical distance provides sufficient space for the fastener to smoothly detach from the outlet of the guide groove 10, and will not collide or get stuck with the limiting plate 15 due to the distance being too close, ensuring the smooth entry of the fastener into the clamping area. When the fastener lands on the limiting plate 15, because the vertical distance is greater than the outer diameter of the fastener, the fastener can be placed stably on the limiting plate 15, and will not wobble or tilt due to the distance being too small. This provides favorable conditions for the V-shaped clamping surfaces 17 of the first clamping block 11 and the second clamping block 14 to accurately clamp the fastener, ensuring the stability and reliability of the clamping action, thereby ensuring the stability of the fastener during the tapping process and improving the tapping accuracy and quality.
[0033] It should be noted that the hydraulic cylinder 18 is mounted on the fixed base 1, and its telescopic rod end is connected to the slide plate 6 using bolts or a dedicated hydraulic cylinder connector to ensure that it will not loosen or fall off during operation. When tapping is required, the telescopic rod of the hydraulic cylinder 18 extends, pushing the slide plate 6 along the slide rail 4 towards the worktable 2. Due to the precise fit between the slide rail 4 and the slider 5, the movement of the slide plate 6 is smooth and accurate, driving the motor 7 and the tap 8 to move together, gradually bringing the tap 8 closer to the fastener to be tapped on the worktable 2. This process achieves precise positioning of the tap 8, providing a strong guarantee for high-quality tapping. After tapping is completed, the telescopic rod of the hydraulic cylinder 18 retracts, pulling the slide plate 6 to slide in the opposite direction along the slide rail 4, moving the tap 8 away from the worktable 2, thus completing one tapping cycle. The use of the hydraulic cylinder 18 not only improves the stability and accuracy of the tap 8's movement but also greatly enhances the automation and production efficiency of the tapping operation, reduces manual intervention, lowers labor intensity, and improves the reliability and safety of equipment operation.
[0034] It is worth noting that the width of the limiting plate 15 is smaller than the outer diameter of the fastener to be tapped. When the fastener slides down the guide groove 10 and finally lands on the limiting plate 15, the fastener can be stably placed on it because the width of the limiting plate 15 is smaller than the outer diameter of the fastener, without the fastener rolling or becoming unstable due to the excessive width of the limiting plate 15. This design ensures that the fastener is in a relatively static and stable state before being clamped, laying the foundation for subsequent precise clamping and tapping operations. Secondly, during the clamping process, the V-shaped clamping surfaces 17 of the first clamping block 11 and the second clamping block 14 need to be tightly fitted to the outer circumferential surface of the fastener. The design that the width of the limiting plate 15 is smaller than the outer diameter of the fastener ensures that there is a certain gap between the bottom of the fastener and the limiting plate 15 when it is clamped. Under the action of clamping force, the fastener will not deform or slide due to excessive contact between the bottom and the limiting plate 15, thus ensuring the stability and reliability of clamping and further improving the tapping accuracy.
[0035] It should be noted that the receiving frame 19 is located below the workbench 2, directly opposite the drop chute 3, with the two precisely aligned vertically. The dimensions of the receiving frame 19 are rationally designed based on the dimensions of the drop chute 3 and the size of the fasteners to be tapped, ensuring that it can fully receive the fasteners falling from the drop chute 3. After the tapping operation is completed, the cylinder 16 drives the second clamping block 14 to separate from the first clamping block 11, releasing the clamp on the fastener. At this time, the tapped fastener falls from the drop chute 3 under the action of gravity and falls directly into the receiving frame 19 below. The setting of the receiving frame 19 realizes the automatic collection of fasteners, eliminating the need for manual removal one by one, greatly improving production efficiency and reducing manual labor intensity.
[0036] It is important to note that the axis of tap 8 coincides with the plane of symmetry of the V-shaped clamping surface 17. When the fastener to be tapped is clamped by the V-shaped clamping surface 17 of the first clamping block 11 and the second clamping block 14, the axis of the fastener will coincide with the plane of symmetry of the V-shaped clamping surface 17. Since the axis of tap 8 also coincides with this plane of symmetry, this ensures that the axes of tap 8 and the fastener are on the same straight line. This precise alignment ensures that tap 8 cuts material evenly along the central axis of the fastener during the tapping process, thereby producing high-quality, high-precision internal threads.
[0037] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A device for tapping a hole in a stainless steel fastener, characterized by, Include: Fixed seat (1), the fixed seat (1) is connected with workstation (2), the workstation (2) is provided with blanking groove (3) on it; Slide rail (4), the slide rail (4) is provided on the fixed seat (1), the slide rail (4) is slidably connected with sliding block (5), the sliding block (5) is connected with slide plate (6), the slide plate (6) is installed with motor (7), the motor (7) is provided with tap (8), the motor (7) drives the tap (8) to rotate; Groove (9), the groove (9) is provided on the workstation (2), and the outlet is provided with guide groove (10) opposite to the blanking groove (3); First clamping block (11), the first clamping block (11) is provided on the side of blanking groove (3); Guide block (12), the guide block (12) is provided on the side of blanking groove (3), and it is opposite to the first clamping block (11), the guide block (12) is provided with sliding groove (13); Second clamping block (14), the second clamping block (14) is slidably provided on the guide block (12), and the bottom is provided with limit plate (15) to hold the fastener to be tapped; Cylinder (16), the cylinder (16) is connected to the side wall of the second clamping block (14), drives the second clamping block (14) to slide along the guide block (12), so that the second clamping block (14) cooperates with the first clamping block (11), so as to clamp the fastener to be tapped.
2. The apparatus of claim 1 wherein, The guide groove (10) is arc-shaped, and the width is matched with the height of the fastener to be tapped, and the fastener to be tapped can slide down in the guide groove (10) to the limit plate (15).
3. The apparatus of claim 1 wherein: The opposite faces of the first clamping block (11) and the second clamping block (14) are provided with V-shaped clamping surfaces (17).
4. The apparatus of claim 3 wherein, The vertical distance from the limit plate (15) to the outlet of the guide groove (10) is greater than the outer diameter of the fastener to be tapped.
5. A stainless steel fastener tapping device according to any one of claims 1-4 wherein, It also includes hydraulic cylinder (18), the hydraulic cylinder (18) is provided on the fixed seat (1), and the end of the telescopic rod is connected to the slide plate (6), the hydraulic cylinder (18) can drive the slide plate (6) to slide along the slide rail (4), realize that the tap (8) is close to or away from the workstation (2).
6. The apparatus of claim 5 wherein, The width of the limit plate (15) is less than the outer diameter of the fastener to be tapped.
7. The apparatus of claim 6 wherein, It also includes a receiving frame (19), the receiving frame (19) is provided below the workstation (2), and it is opposite to the blanking groove (3).
8. The apparatus of claim 3 wherein: The axis of the tap (8) coincides with the symmetry plane of the V-shaped clamping surface (17).