A metal product tooling positioning pin structure

Abstract

This utility model belongs to the field of metal product processing technology and discloses a positioning pin structure for metal product tooling. It includes a processing table with two circular grooves at its top. Two positioning pin bodies are provided on the inner surfaces of each groove. Each positioning pin body includes a pin rod located within a circular groove. The pin rod is hollow, and a fixing plate is fixedly fitted onto its inner surface. By setting the positioning pin body, under the elastic force of a tension spring and a return spring, pressing the drive rod can drive the core rod downwards, causing the ball to retract from the annular fixing groove and embed into the receiving groove of the core rod, achieving rapid separation of the positioning pin body from the circular groove of the processing table. After releasing the drive rod, the core rod moves upwards under the return spring action, and the ball ejects again and engages with the annular fixing groove to complete the fixation. This solves the problems of laborious disassembly and easy wear of traditional positioning pins, significantly improving the convenience of installation and disassembly.

Description

Technical Field

[0001] This utility model belongs to the field of metal product processing technology, specifically a metal product tooling positioning pin structure. Background Technology

[0002] In the manufacturing and processing of metal products, precise positioning is a crucial step in ensuring product quality and production efficiency. From the cutting and shaping of raw materials to the welding and assembly of parts, each process relies on precise workpiece positioning. Positioning pins, as important tooling components for achieving precise positioning, play a vital role in this process.

[0003] In use, most existing tooling positioning pins are fixed by interference fit. When it is necessary to adjust the positioning position or disassemble for maintenance, it is often necessary to use tools to force them in and out. This is not only laborious, but also prone to wear of the pin or workpiece positioning hole due to uneven force, which affects the subsequent positioning accuracy.

[0004] Therefore, a positioning pin structure for metal product tooling is proposed to address the above problems. Utility Model Content

[0005] To address the problems mentioned in the background art, this utility model provides a metal product tooling positioning pin structure, which solves the problems of laborious disassembly and easy wear of traditional positioning pins, greatly improves the convenience of installation and disassembly, and further enhances the stability and applicability of the positioning structure.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a positioning pin structure for metal product tooling, including a processing table, the top of which has two circular grooves, and the inner surfaces of the two circular grooves are provided with two positioning pin bodies; each positioning pin body includes a pin rod, the pin rod being located within the circular groove, the pin rod being a hollow rod, and a fixing plate being fixedly sleeved on the inner surface of the pin rod; a driving rod is slidably connected to the inner surface of the fixing plate, a tension spring is wound around the outer surface of the driving rod, and the bottom end of the driving rod penetrates the fixing plate and is fixedly connected to a core rod, the core rod... The rod and pin are slidably sleeved together. The inner surface of the pin has several through-type rolling grooves, and each of the rolling grooves has a ball movably embedded in its inner surface. The outer wall of the core rod abuts against the inner side of the ball. The inner surface of the circular groove has an annular fixing groove for use with the ball. The outer surface of the core rod has an annular receiving groove. A return spring is fixedly connected to the bottom end of the core rod. The bottom end of the return spring is fixedly connected to the lower inner wall of the pin. The pin includes an external thread engraved on its outer surface, and a clamping bolt is threaded onto the pin through the external thread.

[0007] Preferably, the top end of the tension spring is fixedly connected to the fixing plate, and the bottom end of the tension spring is fixedly connected to the core rod.

[0008] Preferably, two limiting blocks are fixedly connected to the outer surface of the core rod, and a limiting groove is formed on the inner surface of the pin rod to cooperate with the two limiting blocks.

[0009] Preferably, the position of the receiving groove corresponds to the rolling groove, and the depth of the receiving groove is adapted to the rolling ball.

[0010] Preferably, the width of the groove opening is smaller than the diameter of the ball, and the width of the groove cavity is larger than the diameter of the ball, so that the ball can roll radially in the groove and cannot be dislodged from the groove due to the size limitation of the groove opening.

[0011] Preferably, the bottom end of the clamping bolt is provided with a soft pad.

[0012] Preferably, an anti-detachment plate is fixedly connected to the top of the pin, and the anti-detachment plate is located directly above the external thread.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, by setting a positioning pin body, allows the core rod to move downward under the elastic force of the tension spring and the return spring when the drive rod is pressed, causing the ball to retract from the annular fixing groove and embed into the receiving groove of the core rod, thus realizing the rapid separation of the positioning pin body from the circular groove of the processing table; after the drive rod is released, the core rod moves upward under the return spring action, and the ball pops out again and is locked into the annular fixing groove to complete the fixation, solving the problems of laborious disassembly and easy wear of traditional positioning pins, and greatly improving the convenience of installation and disassembly.

[0014] 2. By setting a clamping bolt, the clamping bolt can form a stable pressure on the bottom of the workpiece under the action of the thread tightening force. Combined with the positioning and locking of the ball and the annular fixing groove, it not only avoids the shaking and displacement of the workpiece during processing, but also reduces the pressure damage to the surface of the workpiece through the soft pad, further improving the stability and applicability of the positioning structure. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the cross-sectional structure of the processing table of this utility model; Figure 3 This is a schematic diagram of the positioning pin body structure of this utility model; Figure 4 This is a schematic diagram of the cross-sectional structure of the pin of this utility model; Figure 5 This is a cross-section of the pin rod of this utility model and a schematic diagram showing the internal components of the pin rod after removal.

[0016] In the diagram: 1. Machining table; 11. Circular groove; 12. Fixing groove; 2. Positioning pin body; 21. Pin; 211. Drive rod; 212. Fixing plate; 213. Tension spring; 214. Core rod; 215. Receiving groove; 216. Ball bearing; 217. Limiting block; 218. Return spring; 219. Rolling groove; 220. Limiting groove; 22. External thread; 23. Clamping bolt; 24. Anti-detachment plate; 25. Soft pad. Detailed Implementation

[0017] 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.

[0018] like Figures 1 to 5 As shown, this utility model provides a metal product tooling positioning pin structure, including a processing table 1. The top of the processing table 1 has two circular grooves 11. The inner surface of each of the two circular grooves 11 is provided with two positioning pin bodies 2. By opening the circular grooves 11 and embedding the positioning pin bodies 2 in the processing table 1, the positioning pins and the processing table 1 can be integrated and installed. At the same time, the layout of the double circular grooves 11 and the double positioning pin bodies 2 can form multi-directional positioning support for the workpiece, improve positioning stability, and avoid workpiece displacement caused by uneven force on a single positioning point. The positioning pin body 2 includes a pin 21, which is located within a circular groove 11. The pin 21 is hollow, and a fixing plate 212 is fixedly sleeved on the inner surface of the pin 21. A drive rod 211 is slidably connected to the inner surface of the fixing plate 212, and a tension spring 213 is wound around the outer surface of the drive rod 211. The bottom end of the drive rod 211 passes through the fixing plate 212 and is fixedly connected to a core rod 214. The core rod 214 is slidably sleeved with the pin 21. Several through-type rolling grooves 219 are formed on the inner surface of the pin 21. Balls 216 are movably embedded in the inner surface of each of the rolling grooves 219, and the outer wall of the core rod 214 abuts against the inner side of the ball 216. The inner surface of the groove 11 is provided with an annular fixing groove 12 for use with the ball 216, and the outer surface of the core rod 214 is provided with an annular receiving groove 215. The bottom end of the core rod 214 is fixedly connected to a return spring 218, and the bottom end of the return spring 218 is fixedly connected to the lower inner wall of the pin 21. The abutting engagement between the core rod 214 and the ball 216, combined with the limiting of the rolling groove 219 and the annular fixing groove 12, realizes the quick locking of the positioning pin body 2 and the circular groove 11. At the same time, the design of the receiving groove 215 and the return spring 218 allows the ball 216 to be easily unlocked when the core rod 214 moves down. The overall structure takes into account both the stability of positioning and the convenience of operation.

[0019] Specifically, the top end of the tension spring 213 is fixedly connected to the fixing plate 212, and the bottom end of the tension spring 213 is fixedly connected to the core rod 214. The two ends of the tension spring 213 are respectively connected to the fixing plate 212 and the core rod 214, providing continuous upward tension to the core rod 214, ensuring that the core rod 214 always presses against the ball 216 under normal conditions, so that the ball 216 is stably locked into the annular fixing groove 12, realizing automatic locking between the positioning pin body 2 and the circular groove 11, reducing manual locking operations and improving positioning efficiency.

[0020] like Figures 1 to 5 As shown, two limiting blocks 217 are fixedly connected to the outer surface of the core rod 214, and a limiting groove 220 is opened on the inner surface of the pin 21 to cooperate with the two limiting blocks 217. The limiting blocks 217 of the core rod 214 cooperate with the limiting groove 220 of the pin 21 to limit the axial movement range of the core rod 214, and prevent the core rod 214 from slipping due to excessive sliding, causing the ball 216 to disengage from the rolling groove 219 or the receiving groove 215 to become misaligned, thus ensuring the accuracy and reliability of the structural movement.

[0021] Furthermore, the position of the receiving groove 215 corresponds to the rolling groove 219, and the groove depth of the receiving groove 215 is adapted to the ball 216. The receiving groove 215 and the rolling groove 219 are positioned and the groove depth is adapted to the ball 216, so that when the core rod 214 moves down, the ball 216 can be accurately embedded into the receiving groove 215, realizing the rapid disengagement of the ball 216 from the annular fixing groove 12, providing a smooth unlocking path for the disassembly of the positioning pin body 2, and solving the problem of jamming during the disassembly of traditional positioning pins.

[0022] like Figures 1 to 5 As shown, the width of the groove opening of the rolling groove 219 is smaller than the diameter of the ball 216, and the width of the groove cavity of the rolling groove 219 is larger than the diameter of the ball 216. This allows the ball 216 to roll radially within the groove, and it cannot be dislodged from the rolling groove 219 due to the size limitation of the groove opening. The "narrow groove opening and wide groove cavity" structural design of the rolling groove 219 ensures that the ball 216 can roll freely radially to achieve locking and unlocking functions, while preventing the ball 216 from dislodging from the rolling groove 219 by limiting the groove opening size. This avoids component loss or structural failure and extends the service life of the locating pin.

[0023] It is worth noting that the pin 21 includes an external thread 22 engraved on its outer surface. The pin 21 is threadedly connected to a clamping bolt 23 through the external thread 22. The external thread 22 of the pin 21 and the clamping bolt 23 are threadedly engaged. The clamping force on the workpiece can be adjusted by turning the clamping bolt 23, which can be adapted to workpieces of different thicknesses or materials. This solves the problem of workpiece damage or insecure fixation caused by the clamping force fixation of traditional positioning pins, and improves the versatility of the structure.

[0024] like Figures 1 to 5As shown, the bottom end of the clamping bolt 23 is provided with a soft pad 25. The soft pad 25 at the bottom end of the clamping bolt 23 can buffer the direct impact of the clamping force on the surface of the workpiece, and avoid the workpiece from being indented or scratched due to rigid contact. It is especially suitable for positioning scenarios of metal products with high surface precision requirements, and ensures the processing quality of the workpiece.

[0025] It is worth emphasizing that the top of the pin 21 is fixedly connected with an anti-detachment plate 24. The anti-detachment plate 24 is located directly above the external thread 22. The anti-detachment plate 24 can effectively prevent the clamping bolt 23 from completely disengaging from the external thread 22, thereby preventing the clamping bolt 23 from falling off the pin 21 when it is screwed upward.

[0026] Working principle and process: Under normal conditions, the return spring 218 pushes the core rod 214 upward, and the tension spring 213 pulls the core rod 214 upward simultaneously. The outer wall of the core rod 214 abuts against the ball 216, causing the ball 216 to extend radially outward along the rolling groove 219 and be inserted into the annular fixing groove 12 of the circular groove 11, thereby fixing the positioning pin body 2 to the processing table 1. When disassembly or adjustment is required, the drive rod 211 is pressed downward, and the core rod 214 moves downward against the spring force. The receiving groove 215 aligns with the rolling groove 219, and the ball 216 retracts into the receiving groove 215 and disengages from the annular fixing groove 12. The positioning pin body 2 can then be removed from the circular groove 11. When positioning the workpiece, the workpiece hole is fitted into the pin 21, the clamping bolt 23 is tightened, and the soft pad 25 adheres to the workpiece surface to complete the fixation.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A metal product tooling positioning pin structure, comprising a processing table (1), characterized in that: The processing table (1) has two circular grooves (11) at its top. The inner surfaces of the two circular grooves (11) are provided with two positioning pin bodies (2). The positioning pin body (2) includes a pin rod (21). The pin rod (21) is located in the circular groove (11). The pin rod (21) is a hollow rod. A fixing plate (212) is fixedly sleeved on the inner surface of the pin rod (21). A driving rod (211) is slidably connected to the inner surface of the fixing plate (212). A tension spring (213) is wound around the outer surface of the driving rod (211). The bottom end of the driving rod (211) passes through the fixing plate (212) and is fixedly connected to a core rod (214). The core rod (214) is slidably sleeved with the pin rod (21). The inner surface of the pin rod (21) has several... A through-type rolling groove (219), the inner surface of which is movably embedded with a ball (216), and the outer wall of the core rod (214) abuts against the inner side of the ball (216). The inner surface of the circular groove (11) is provided with an annular fixing groove (12) for use with the ball (216). The outer surface of the core rod (214) is provided with an annular receiving groove (215). The bottom end of the core rod (214) is fixedly connected with a return spring (218). The bottom end of the return spring (218) is fixedly connected to the lower inner wall of the pin (21). The pin (21) includes an external thread (22) engraved on the outer surface of the pin (21). The pin (21) is threaded with a clamping bolt (23) through the external thread (22).

2. The positioning pin structure for metal product tooling according to claim 1, characterized in that: The top end of the tension spring (213) is fixedly connected to the fixing plate (212), and the bottom end of the tension spring (213) is fixedly connected to the core rod (214).

3. The positioning pin structure for metal product tooling according to claim 1, characterized in that: Two limiting blocks (217) are fixedly connected to the outer surface of the core rod (214), and a limiting groove (220) is opened on the inner surface of the pin (21) to cooperate with the two limiting blocks (217).

4. The positioning pin structure for metal product tooling according to claim 1, characterized in that: The position of the receiving groove (215) corresponds to the rolling groove (219), and the groove depth of the receiving groove (215) is adapted to the ball (216).

5. The positioning pin structure for a metal product tooling according to claim 4, characterized in that: The width of the groove opening of the rolling groove (219) is smaller than the diameter of the ball (216), and the width of the groove cavity of the rolling groove (219) is larger than the diameter of the ball (216), so that the ball (216) can roll radially in the groove, and cannot be removed from the rolling groove (219) due to the limitation of the groove opening size.

6. The positioning pin structure for a metal product tooling according to claim 1, characterized in that: The bottom end of the clamping bolt (23) is provided with a soft pad (25).

7. The positioning pin structure for a metal product tooling according to claim 1, characterized in that: The top end of the pin (21) is fixedly connected to an anti-detachment plate (24), which is located directly above the external thread (22).

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