A clamping structure for polishing and grinding of wire drawing dies

Abstract

A kind of clamping structure for polishing and grinding of wire drawing die includes chuck for placing wire drawing die, chuck fixing seat for placing chuck, locking seat for clamping wire drawing die with chuck;Bus passes through chuck fixing seat, chuck, wire drawing die and locking seat in turn;The inner wall of chuck is provided with placing groove, the inner wall of placing groove is stepped to adapt to different specifications of wire drawing die, the concave of chuck fixing seat forms chuck fixing groove, the concave of one end of locking seat forms clamping groove, clamping groove clamps wire drawing die with placing groove, the inner wall of the end of clamping groove towards wire drawing die is concave to form connecting groove matched with the outer surface of chuck fixing seat, chuck fixing seat and locking seat clamp and fix wire drawing die on chuck fixing seat by thread cooperation.The utility model solves the problems of poor adaptability, complicated clamping, easy loosening during movement, affecting polishing and grinding quality and efficiency of existing high-hardness polycrystalline die polishing and grinding clamping equipment.

Description

Technical Field

[0001] This utility model belongs to the field of diamond wire manufacturing, and in particular relates to a clamping structure for polishing and grinding wire drawing dies. Background Technology

[0002] In high-precision manufacturing fields such as photovoltaic silicon wafer cutting and semiconductor material processing, diamond wire has become one of the core processing tools due to its significant advantages such as high cutting efficiency, low kerf loss, and low environmental pollution. The production quality and precision of diamond wire directly depend on the performance of the wire drawing die. As a key forming component in the diamond wire drawing process, the core function of the diamond wire drawing die is to continuously draw the metal wire (such as tungsten wire, steel wire, etc.) through the die hole, so that the wire gradually achieves the diameter accuracy and surface finish required for diamond wire production. At the same time, it provides a uniform and stable substrate surface for the subsequent diamond abrasive coating process. Therefore, the dimensional accuracy, surface roughness, and geometric consistency of the die hole directly determine the final product quality and production qualification rate of the diamond wire.

[0003] In the manufacturing and maintenance of diamond wire drawing dies, the grinding and polishing of the die holes are of irreplaceable importance. On one hand, after initial machining, the inner walls of newly made dies are prone to micro-scratches, burrs, and machining textures. Without precision grinding and polishing, these defects can lead to scratches and burrs on the wire surface during drawing, and in severe cases, even wire breakage, reducing production efficiency and increasing costs. On the other hand, during long-term use, the inner walls of the die holes gradually deteriorate due to friction and wear from the wire, and the adhesion of metal debris. Grinding to remove the wear layer and polishing to restore the smoothness of the inner walls can significantly extend the die's lifespan and reduce the company's die procurement and replacement costs. Furthermore, the high-precision surface achieved after grinding and polishing reduces frictional resistance during drawing, lowers wire tension fluctuations, and further ensures the uniformity of the diamond wire diameter, meeting the stringent requirements of high-precision manufacturing for diamond wire.

[0004] However, existing clamping equipment is mostly designed with fixed dimensions, only compatible with drawing dies of specific specifications. In diamond wire production, multiple dies of different specifications need to be changed according to different wire diameter requirements. This means that each die change necessitates replacing the corresponding clamping components, increasing equipment procurement costs, extending downtime for die changes, and reducing production efficiency. Furthermore, existing clamping equipment cannot stably hold some irregularly shaped or non-standard sized drawing dies, making it difficult to meet the demands of high-precision grinding.

[0005] The clamping process of existing clamping equipment is usually quite complex, requiring the gradual adjustment of clamping position and force through multiple bolts, clips, or adjustment knobs. In batch mold grinding scenarios, frequent clamping operations accumulate a lot of time costs and significantly reduce grinding efficiency; at the same time, manual adjustment is prone to clamping position deviations, affecting the coaxiality and accuracy of mold hole grinding.

[0006] During the grinding and polishing process, the vibrations and impacts generated during movement can easily cause the existing clamping structure to loosen. In equipment using elastic grippers, as the number of uses increases, the elastic fatigue of the grippers leads to a decrease in clamping force, which can also cause the mold to loosen. Mold loosening not only causes quality problems such as scratches of varying depths and excessive ovality on the ground surface of the mold holes, but may also cause equipment damage or safety accidents due to mold detachment, seriously affecting production stability. Utility Model Content

[0007] The purpose of this utility model is to provide a clamping structure for polishing and grinding wire drawing dies, so as to solve the technical problems of poor adaptability, cumbersome clamping, and easy loosening of existing clamping equipment for polishing and grinding wire drawing dies, which affect the quality and efficiency of polishing and grinding.

[0008] To achieve the above objectives, the specific technical solution of the clamping structure for polishing and grinding wire drawing dies according to this utility model is as follows:

[0009] A clamping structure for polishing and grinding wire drawing dies includes a chuck for placing the wire drawing die, a chuck fixing seat for placing the chuck, and a locking seat for clamping the wire drawing die with the chuck; a busbar passes through the chuck fixing seat, the chuck, the wire drawing die, and the locking seat in sequence.

[0010] The chuck has a placement groove on the inner wall of the end facing the wire drawing die. The inner wall of the placement groove is stepped to accommodate wire drawing dies of different sizes. The chuck fixing seat is recessed to the chuck to place the chuck. The locking seat is recessed to the end facing the wire drawing die to form a clamping groove. The clamping groove and the placement groove clamp the wire drawing die. The inner wall of the clamping groove facing the wire drawing die is recessed to form a connecting groove that matches the outer surface of the chuck fixing seat. The inner wall of the connecting groove is threaded. The outer surface of the chuck fixing seat facing the wire drawing die is threaded to the inner wall of the connecting groove. The chuck fixing seat and the locking seat clamp and fix the wire drawing die on the chuck fixing seat through threaded engagement.

[0011] As a further improvement of this utility model, the outer wall of the chuck has a conical structure, and the inner wall of the chuck fixing groove is a conical surface that matches the outer wall of the chuck. When the chuck is inserted into the chuck fixing groove, the cooperation between the conical surfaces enables the chuck to be automatically centered.

[0012] As a further improvement of this utility model, the side wall of the placement groove is composed of several discontinuous side wall pieces. After the chuck enters the chuck fixing seat, the side wall pieces abut against the inner wall of the chuck fixing seat. After the chuck fixing seat and the locking seat are locked, the side wall pieces clamp the wire drawing mold.

[0013] As a further improvement of this utility model, the other end of the clamp fixing seat relative to the placement groove is recessed to form a device connection groove, and the device connection groove is connected to the main shaft of the busbar polishing equipment through an internal thread structure.

[0014] As a further improvement of this utility model, the stepped inner wall of the placement groove is provided with at least two steps, the step surface is in contact with the end face of the wire drawing die of the corresponding specification, and the step height matches the thickness of the wire drawing die of the corresponding specification.

[0015] As a further improvement of this utility model, an annular positioning boss is provided at the bottom of the clamping groove. The inner wall of the annular positioning boss is stepped, corresponding to the inner wall of the placement groove. The inner diameter of each step of the annular positioning boss corresponds to the outer diameter of different specifications of wire drawing dies, further restricting the radial displacement of the wire drawing die during the processing.

[0016] As a further improvement of this utility model, the clamp fixing seat, the clamp and the locking seat are provided with through holes coaxially with the wire drawing die hole.

[0017] As a further improvement of this utility model, the outer wall of the locking seat away from the wire drawing die and the outer wall of the clamp fixing seat away from the wire drawing die are provided with anti-slip layers. The anti-slip layers increase the contact friction through concave and convex textures or anti-slip materials.

[0018] As a further improvement of this utility model, the wire drawing die is a high-hardness polycrystalline die.

[0019] Beneficial effects:

[0020] The placement groove on the inner wall of the chuck facing the wire drawing die is stepped, which can directly adapt to wire drawing dies of different specifications without the need to equip special chucks for different specifications or frequently replace clamping components. This design greatly expands the applicability of the clamping structure, reduces downtime and procurement costs caused by component replacement, and enables a single clamping structure to meet diverse polishing and grinding needs of wire drawing dies, thereby improving the overall versatility of the equipment.

[0021] The locking seat clamps the wire drawing die together through the clamping groove and the chuck placement groove, and the chuck fixing seat and the locking seat further clamp and fix the wire drawing die through threaded engagement. The threaded engagement has the characteristics of tight connection and good self-locking, which can provide a continuous and stable clamping force for the wire drawing die, effectively preventing the die from displacement or shaking due to equipment vibration, busbar movement and other factors during polishing and grinding, thus providing a stable foundation for the precise machining of the die hole.

[0022] The simple clamping logic—placing the mold in the chuck, inserting the chuck into the chuck holder, and then securing it with a threaded locking seat—completes mold fixation, eliminating the need for complex adjustment knobs or multi-step snap-fit ​​operations. Operators can quickly master the clamping process without specialized experience, shortening single clamping time. Especially in batch mold processing scenarios, it significantly reduces operational difficulty and improves overall work efficiency.

[0023] The chuck holder holds the chuck through a chuck fixing slot, and the locking seat engages with the chuck holder through a connecting slot and threaded connection. The overall structure is compact and the connection method is conventional. This design eliminates the need for large-scale modifications to existing wire drawing die polishing and grinding equipment, allowing for convenient installation and use, reducing equipment upgrade costs for enterprises, facilitating rapid integration into existing processing production lines, and improving the feasibility of technology implementation and promotion. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a clamping structure for polishing and grinding wire drawing dies according to the present invention;

[0025] Figure 2 This is a side view of the locking seat;

[0026] Figure 3 for Figure 2 Schematic diagram of AA section in the middle;

[0027] The markings in the diagram are as follows: 1. Chuck fixing seat; 11. Chuck fixing groove; 12. Equipment connection groove; 13. Anti-slip layer; 2. Chuck; 21. Placement groove; 22. Side wall plate; 3. Wire drawing die; 31. Die hole; 4. Locking seat; 41. Clamping groove; 42. Connection groove; 43. Annular positioning boss; 5. Busbar. Detailed Implementation

[0028] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0029] Implementation example:

[0030] like Figure 1-3The clamping structure shown is for polishing and grinding wire drawing dies, including a clamping base 1, a clamp 2, a wire drawing die 3, and a locking base 4 arranged in sequence. The wire drawing die 3 is a high-hardness polycrystalline die, and a diamond wire busbar 5 is used as the polishing wire for the die hole 31. In this embodiment, tungsten wire is used as the busbar 5, which passes through the through holes of each component coaxial with the die hole 31. The busbar 5 is driven by a busbar polishing machine to polish and grind the inner wall of the die hole 31.

[0031] The chuck 2 is cylindrical in shape, with its inner wall recessed at the end facing the wire drawing die 3 to form a placement groove 21. The inner wall of the placement groove 21 is designed as a stepped structure. In this embodiment, two steps are provided. The inner diameter of the first step is adapted to the outer diameter of a 37-specification high-hardness polycrystalline die, and the step height is consistent with the thickness of the 37-specification die. The inner diameter of the second step is adapted to the outer diameter of a 41-specification high-hardness polycrystalline die, and the step height matches the thickness of the 41-specification die. The stepped structure of the placement groove 21 can directly support high-hardness polycrystalline dies of different specifications, achieving clamping of two common die specifications, 37 and 41, without changing the chuck, thus solving the problem of poor compatibility of existing clamping equipment. The outer wall of the chuck 2 is tapered, which is used to cooperate with the chuck fixing groove 11 of the chuck fixing seat 1, laying the foundation for subsequent automatic alignment. Meanwhile, the placement groove 21 has a four-claw structure, and the four side wall plates 22 are discontinuously arranged in a four-claw shape. The side wall plates 22 abut against the inner wall of the chuck fixing seat 1, clamping the wire drawing die 3 under the pressure of the chuck fixing seat 1. Furthermore, a through hole is formed inside the chuck 2 along the axial direction. This through hole is coaxial with the through holes of the subsequent chuck fixing seat 1, locking seat 4, and die hole 31 of the wire drawing die 3, and its diameter is slightly larger than the diameter of the tungsten wire busbar 5. The coaxial through hole ensures that the tungsten wire busbar can smoothly pass through the chuck 2, avoiding busbar jamming or wear, and ensuring continuous polishing and grinding operations.

[0032] The chuck fixing seat 1 is a cylindrical block structure. The inner wall of its end facing the wire drawing die 3 is recessed inward to form a chuck fixing groove 11. The inner wall of the chuck fixing groove 11 is a tapered surface with the same taper as the outer wall of the chuck 2, and the depth of the chuck fixing groove 11 matches the length of the chuck 2, ensuring that the chuck 2 can be fully embedded and tightly fitted against the groove wall. The tapered surface of the chuck fixing groove 11 mates with the tapered surface of the outer wall of the chuck 2. When the chuck 2 is inserted, automatic centering can be achieved through self-positioning of the tapered surface, ensuring that the axis of the chuck 2 coincides with that of the chuck fixing seat 1. This, in turn, ensures that the die hole 31 of the wire drawing die and the movement trajectory of the busbar 5 are coaxial, improving machining accuracy. The inner wall of the chuck fixing seat 1 at the end away from the wire drawing die 3 is recessed inward to form an equipment connection groove 12. The inner wall of the equipment connection groove 12 has an internal thread structure, and the thread specification matches the external thread of the main shaft of the main busbar polishing equipment. The internal thread structure of the equipment connecting groove 12 is used to fix the entire clamping structure to the spindle of the busbar polishing equipment, achieving stable assembly of the clamping structure and the equipment. Simultaneously, a through hole is provided inside the chuck fixing seat 1 along its axis. This through hole penetrates the chuck fixing groove 11 and the equipment connecting groove, with a diameter matching the through hole diameter of the chuck and coaxial with the chuck's through hole. This coaxial through hole provides a passageway for the busbar 5, ensuring that the busbar 5 can smoothly enter the chuck fixing seat 1 from the equipment spindle side, and then pass through the chuck 2 and the wire drawing die 3.

[0033] The locking seat 4 is cylindrical, with its inner wall recessed inward at the end facing the wire drawing die 3 to form a clamping groove 41. The depth of the clamping groove 41 matches the thickness of the wire drawing die 3, and the inner wall of the clamping groove 41 is recessed inward at the opening to form a connecting groove 42. The inner wall of the connecting groove 42 has an internal thread structure, the thread specification of which is completely matched with the external thread on the outer surface of the end of the chuck fixing seat 1 facing the wire drawing die 3, ensuring that the two can be tightly connected through threaded engagement. The clamping groove 41 engages with the placement groove 21 of the chuck 2 to achieve initial clamping from both sides of the wire drawing die 3; the connecting groove 42 engages with the thread of the chuck fixing seat 1, and by tightening the locking seat 4, continuous axial pressure can be applied to firmly fix the wire drawing die 3 between the placement groove 21 and the clamping groove 41, preventing the die from loosening due to vibration during the polishing and grinding process. An annular positioning boss 43 is provided at the bottom of the clamping groove 41. The annular positioning boss 43 is correspondingly provided to the placement groove 21. Its inner diameter is adapted to the outer diameter of the wire drawing die 3, and its height is 1-2mm. It is used to further limit the radial displacement of the wire drawing die 3 during the processing and improve the clamping stability. At the same time, a through hole is opened inside the locking seat 4 along the axis. The diameter of the through hole is consistent with the diameter of the through holes of the chuck 2 and the chuck fixing seat 1, and is coaxial with the through holes of the three. The coaxial through hole ensures that the busbar can pass smoothly through the locking seat and complete the complete passage from the chuck fixing seat 1, chuck 2, wire drawing die 3 to the locking seat 4, ensuring that the polishing and grinding operation is carried out normally.

[0034] An anti-slip layer 13 is provided on the outer wall of the locking seat 4 away from the wire drawing die 3 and the outer wall of the clamp fixing seat 1 away from the wire drawing die 3. In this embodiment, the anti-slip layer 13 has axial concave and convex vertical textures, which increases the contact friction between the operator's hand or tool and the locking seat 4; it facilitates the operator or tool to quickly tighten / untighten the locking seat and simplifies the clamping process.

[0035] In use, according to the specifications of the high-hardness polycrystalline mold to be processed, the mold is placed in the placement groove 21 of the chuck, so that the end face of the mold is tightly fitted with the stepped surface of the placement groove 21 of the corresponding specifications. At this time, the mold hole 31 of the mold and the through hole of the chuck 2 are coaxial, completing the initial positioning of the mold. Align the chuck 2, which has been installed with the mold, with the chuck fixing groove 11 of the chuck fixing seat 1, and slowly push it in until the conical outer wall of the chuck 2 is completely fitted with the conical inner wall of the chuck fixing groove 11. The automatic centering of the chuck is achieved through the conical surface fit, ensuring that the through hole of the chuck and the through hole of the chuck fixing seat are coaxial. At the same time, the chuck fixing seat 1 provides stable support for the chuck 2. Align the connecting groove 42 of the locking seat 4 with the external thread of the chuck fixing seat 1. The operator, using the anti-slip layer 13 on the outer wall of the locking seat, manually or with a tool, tightens the locking seat. As the thread engagement progresses, the clamping groove 41 of the locking seat 4 gradually approaches the wire drawing die 3, eventually clamping and fixing the die together with the placement groove 21 of the chuck 2. At this point, the through holes of the entire clamping structure are completely coaxial. Through the equipment connecting groove 12 of the chuck fixing seat 1, the entire clamping structure is threadedly fixed to the spindle of the busbar polishing equipment. The tungsten wire busbar 5 passes through the through hole of the chuck fixing seat, the through hole of the chuck, the die hole of the wire drawing die, and the through hole of the locking seat in sequence. Start the polishing equipment, and the busbar, in coordination with the equipment movement, polishes and grinds the center hole of the high-hardness polycrystalline die. During the processing, due to the stable fixation of the clamping structure, the die does not shift or shake, ensuring processing quality and efficiency.

[0036] The clamping structure of this utility model features a chuck placement groove that combines a tapered four-jaw structure with a positioning stepped hole, making it compatible with both 37 and 41 specification wire drawing dies without the need for frequent chuck changes. The clamping process is simple; relying on the tapered fit and open-type locking nut, operators can quickly complete the clamping, reducing operational difficulty and time costs. The clamping force of the tapered four-jaw, the support of the chuck fixing seat, and the elastic compression of the open-type locking nut ensure that the die does not shift or loosen during processing, guaranteeing stability. The cooperation of each component achieves precise positioning, improving the smoothness and roundness of the polished and ground center hole of the die, meeting the processing requirements of high-hardness polycrystalline dies.

[0037] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A clamping structure for polishing and grinding wire drawing dies, characterized in that, It includes a chuck for placing a wire drawing die, a chuck fixing seat for placing the chuck, and a locking seat that clamps the wire drawing die with the chuck; the busbar passes through the chuck fixing seat, the chuck, the wire drawing die, and the locking seat in sequence; The chuck has a placement groove on the inner wall of the end facing the wire drawing die. The inner wall of the placement groove is stepped to accommodate wire drawing dies of different sizes. The chuck fixing seat is recessed to the chuck to place the chuck. The locking seat is recessed to the end facing the wire drawing die to form a clamping groove. The clamping groove and the placement groove clamp the wire drawing die. The inner wall of the clamping groove facing the wire drawing die is recessed to form a connecting groove that matches the outer surface of the chuck fixing seat. The inner wall of the connecting groove is threaded. The outer surface of the chuck fixing seat facing the wire drawing die is threaded to the inner wall of the connecting groove. The chuck fixing seat and the locking seat clamp and fix the wire drawing die on the chuck fixing seat through threaded engagement.

2. The clamping structure for polishing and grinding wire drawing dies according to claim 1, characterized in that, The outer wall of the chuck has a conical structure, and the inner wall of the chuck fixing groove is a conical surface that matches the outer wall of the chuck. When the chuck is inserted into the chuck fixing groove, the fit between the conical surfaces enables the chuck to be automatically centered.

3. The clamping structure for polishing and grinding wire drawing dies according to claim 2, characterized in that, The sidewall of the placement groove is composed of several discontinuous sidewall pieces. After the chuck enters the chuck fixing seat, the sidewall pieces abut against the inner wall of the chuck fixing seat. After the chuck fixing seat and the locking seat are locked, the sidewall pieces clamp the wire drawing die.

4. The clamping structure for polishing and grinding wire drawing dies according to claim 1, characterized in that, The clamp fixing seat is recessed at the other end of the placement groove to form a device connection groove, which is connected to the spindle of the busbar polishing equipment through an internal thread structure.

5. The clamping structure for polishing and grinding wire drawing dies according to claim 1, characterized in that, The stepped inner wall of the placement groove is provided with at least two steps, the step surface is in contact with the end face of the wire drawing die of the corresponding specification, and the step height matches the thickness of the wire drawing die of the corresponding specification.

6. The clamping structure for polishing and grinding wire drawing dies according to claim 1, characterized in that, The bottom of the clamping groove is provided with an annular positioning boss. The inner wall of the annular positioning boss is stepped, corresponding to the inner wall of the placement groove. The inner diameter of each step of the annular positioning boss corresponds to the outer diameter of different specifications of wire drawing dies, which further restricts the radial displacement of the wire drawing die during the processing.

7. The clamping structure for polishing and grinding wire drawing dies according to claim 1, characterized in that, The clamp fixing seat, the clamp, and the locking seat are provided with through holes coaxially with the wire drawing die hole.

8. The clamping structure for polishing and grinding wire drawing dies according to claim 1, characterized in that, The outer wall of the locking seat away from the wire drawing die and the outer wall of the clamp fixing seat away from the wire drawing die are provided with anti-slip layers. The anti-slip layers increase the contact friction through concave and convex textures or anti-slip materials.

9. The clamping structure for polishing and grinding wire drawing dies according to claim 1, characterized in that, The wire drawing die is a high-hardness polycrystalline die.

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