A tungsten bar polishing device

Abstract

A tungsten strip polishing device comprises a gear box, a driving device connected with the gear box, a gear set arranged in the gear box, and a polishing structure; the gear set comprises a driving gear and at least two transmission gears in meshing connection, the output end of the driving device is connected with the driving gear in the gear box, and the polishing structure comprises a polishing wheel arranged corresponding to the transmission gears, and the transmission gears are connected with the polishing wheel through a transmission shaft; the driving device drives the output end to drive the driving gear to rotate, drives the transmission gears to rotate through meshing cooperation, and realizes polishing of the polishing wheel on the surface of the tungsten strip. The utility model drives the driving gear in the gear set to mesh the transmission gears through the driving device, synchronously drives the polishing wheel to clamp and polish the tungsten strip through the transmission shaft, and cooperates with the adjustable speed design, solves the problems that the existing tungsten strip polishing efficiency is low, the surface uniformity is poor, and the recessed tungsten oxide is difficult to remove.

Description

Technical Field

[0001] This utility model belongs to the field of diamond wire manufacturing, and in particular relates to a tungsten bar grinding device. Background Technology

[0002] In high-tech fields such as photovoltaics and semiconductors, the precision cutting of hard and brittle materials (such as monocrystalline silicon wafers and sapphire substrates) relies on high-performance cutting tools. Diamond wire, as the core cutting component, is essentially a wire saw formed by uniformly fixing diamond micro powder on the surface of a metal busbar with a binder. With its advantages of high cutting efficiency, low kerf loss, and high processing accuracy, it has become the mainstream tool in the field of cutting hard and brittle materials.

[0003] The cutting performance of diamond wire is closely related to the material of the metal busbar. Most existing diamond wire busbars use tungsten wire because of its high tensile strength, high temperature resistance, and dimensional stability, which can ensure continuous and precise cutting. Tungsten wire is made from tungsten bars, so the surface quality of the tungsten bars plays a decisive role in the processing accuracy and final performance of the tungsten wire.

[0004] In the production and processing of tungsten bars, tungsten's reactive chemical properties easily lead to the formation of a tungsten oxide layer. Currently, the industry mainly uses two methods: cleaning machines and manual polishing. While cleaning machines remove the tungsten oxide layer, limitations in the cleaning process mean that tungsten oxide residues still remain in surface depressions and crevices. These residues not only reduce the surface quality of the tungsten bars but also cause surface defects during subsequent processing into tungsten wires, weakening their mechanical properties and affecting diamond wire cutting performance, ultimately negatively impacting the quality of photovoltaic and semiconductor device products.

[0005] Manual polishing is the mainstream processing method, in which operators use sandpaper, grinding wheels, and other tools to manually grind the surface of tungsten bars. This not only consumes a lot of manpower but also has extremely low polishing efficiency, making it difficult to meet the batch processing needs of tungsten bars in industrial production. More importantly, manual polishing cannot precisely control the polishing force and trajectory, which easily leads to uneven polishing depth on the surface of the tungsten bar. Some areas have not completely removed tungsten oxide, while other areas have wasted tungsten material due to over-polishing. Ultimately, it is impossible to guarantee the consistency of the surface quality of the tungsten bar, making it difficult to meet the strict requirements of tungsten wire processing for surface uniformity and flatness. This has become a key bottleneck restricting the production efficiency and quality improvement of diamond wire busbars. Utility Model Content

[0006] The purpose of this utility model is to provide a tungsten bar grinding device to solve the technical problems of low efficiency, poor surface uniformity, and difficulty in removing tungsten oxide from the surface of tungsten bars caused by reliance on manual labor or lack of suitable equipment in existing tungsten bar grinding.

[0007] To achieve the above objectives, the specific technical solution of the tungsten bar grinding device of this utility model is as follows:

[0008] A tungsten bar grinding device includes a gearbox, a drive device connected to the gearbox, a gear set disposed in the gearbox, and a grinding structure;

[0009] The gear set includes a drive gear and at least two transmission gears that mesh with each other. The output end of the drive device is connected to the drive gear inside the gearbox. The grinding structure includes a grinding wheel corresponding to the transmission gear. The transmission gear is connected to the grinding wheel through a transmission shaft.

[0010] The drive device drives the output end to rotate the drive gear, and through meshing, drives the transmission gear to rotate, thereby achieving the grinding wheel grinding the surface of the tungsten strip.

[0011] As a further improvement of this utility model, the lower end face of the gearbox is provided with a through hole for the transmission shaft to pass through, a bearing is provided in the through hole, the outer ring of the bearing is connected to the inner wall of the through hole, and the inner ring of the bearing is connected to the transmission shaft.

[0012] As a further improvement of this utility model, retaining rings are provided on both sides of the bearing to limit the passage of the transmission shaft.

[0013] As a further improvement of this utility model, the grinding wheel is a stainless steel wire wheel, and the tungsten strip passes between the two stainless steel wire wheels.

[0014] As a further improvement of this utility model, right-angle mounting seats are symmetrically arranged on both outer walls of the gearbox. The right-angle mounting seats include two mounting plates that are perpendicularly connected to each other. The two mounting plates are respectively connected to the gearbox and the external frame.

[0015] As a further improvement of this utility model, the gearbox has an opening on its side, and a gearbox cover is adapted to fit the opening to close the internal space of the gearbox; a sealing gasket is provided between the gearbox cover and the edge of the opening to fill the gap between them.

[0016] As a further improvement of this utility model, the driving device includes an adjustable speed motor and a motor mounting base; one end of the motor mounting base is connected to the top outer wall of the gearbox, and the other end is connected to the adjustable speed motor; the output end of the adjustable speed motor extends through the motor mounting base into the gearbox and is connected to the drive gear.

[0017] As a further improvement of this utility model, the grinding wheel is detachably connected to the drive shaft, the outer side of the end of the drive shaft is provided with an external thread or a groove, and the grinding wheel is provided with an internal thread hole adapted to the external thread or a snap-fit ​​part adapted to the groove.

[0018] As a further improvement of this utility model, the retaining ring includes a retaining ring for the shaft and a retaining ring for the hole. The surface of the transmission shaft is provided with an annular groove for fitting the retaining ring for the shaft, and the inner wall of the through hole is provided with an annular groove for fitting the retaining ring for the hole.

[0019] Beneficial effects:

[0020] When the power output from the drive unit is transmitted to each transmission gear via the drive gear, it ensures that all grinding wheels maintain a consistent rotation speed and coordinated direction. This avoids problems such as localized tungsten oxide residue, over-grinding, and uneven grinding depth caused by inconsistent pressure and random trajectory deviations during manual grinding. At least two grinding wheels can form multi-directional or clamping contact with the tungsten strip, ensuring that recessed areas are thoroughly ground. Ultimately, this minimizes the surface flatness error of the tungsten strip, meeting the stringent requirements for raw material surface uniformity in subsequent tungsten wire processing. This fundamentally solves the drawback of manual grinding's inability to guarantee consistent quality.

[0021] The gear set's meshing transmission method results in low power loss, ensuring a continuous and stable power transfer from the drive unit to the grinding wheels. This avoids the intermittent operation and efficiency decline caused by physical exhaustion during manual grinding, enabling continuous grinding of tungsten bars. The design of multiple grinding wheels allows for simultaneous grinding of multiple key surfaces of the tungsten bar, increasing the contact area per grinding cycle compared to manual single-sided spot grinding, thus improving grinding efficiency. This design is suitable for industrial-scale batch processing of tungsten bars, effectively addressing the problem of existing technologies lacking efficient equipment and unable to meet mass production demands. The synergistic effect of multiple grinding wheels thoroughly removes residual tungsten oxide from recesses, and the stability of the gear transmission prevents the grinding wheels from scratching the tungsten bar substrate. This ensures that the tungsten bar surface is free of tungsten oxide residue and additional damage, providing high-quality raw materials for subsequent tungsten wire drawing and diamond wire processing. It also reduces the scrap rate of downstream products due to tungsten bar surface defects, ensuring the quality stability of the entire production chain.

[0022] The gear set is integrated into the gearbox, and the drive unit is directly connected to the gearbox. The grinding structure is connected to the transmission components inside the gearbox through the drive shaft, forming an integrated and compact structure. This not only reduces the overall space occupied by the equipment, but also avoids the risk of failure such as dust pollution and component wear caused by the transmission components being exposed to the outside. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a tungsten bar grinding device according to the present invention;

[0024] Figure 2 This is a side view of the present invention;

[0025] Figure 3 for Figure 2 AA section view;

[0026] Figure 4 for Figure 2 BB cross-sectional view;

[0027] The markings in the diagram are as follows: 1. Gearbox; 11. Bearing; 12. Right-angle mounting base; 13. Opening; 14. Gearbox cover; 2. Drive unit; 21. Adjustable speed motor; 22. Motor mounting base; 3. Gear set; 31. Drive gear; 32. Transmission gear; 33. Transmission shaft; 4. Grinding structure; 41. Grinding wheel; 5. Tungsten bar. 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 1-4 The tungsten bar polishing device shown includes a gearbox 1 as the core load-bearing and transmission protection component, a drive device 2 as the power output source, a gear set 3 as the power distribution component, a polishing structure 4 as the tungsten oxide removal execution component, and a right-angle mounting base 12 as the equipment fixing component. The components are detachably or fixedly connected to form an integrated device, which can be directly integrated into the rear end of the tungsten bar cleaning machine to realize continuous cleaning and polishing operations.

[0031] The gearbox 1 is welded from high-strength steel plates, forming a rectangular structure with wall thickness sufficient for load-bearing and protection. A through-hole for the drive shaft 33 passes through, housing a bearing 11. The bearing's outer ring is fixedly connected to the inner wall of the through-hole. Snap rings are installed on the outer sides of the bearing's upper and lower ends. The drive shaft 33 has an annular groove corresponding to the snap rings, with the snap rings embedded in the grooves to restrict axial movement of the drive shaft. An annular groove is correspondingly provided on the inner wall of the through-hole, with snap rings embedded in it to restrict axial movement of the bearing. Through the cooperation of the shaft snap rings and the hole snap rings, bidirectional axial positioning of the drive shaft 33 and bearing 11 within the through-hole is achieved, ensuring stability during transmission. The gearbox 1 serves as the mounting carrier for the gear set 3 and the drive shaft 33, providing a closed transmission space to prevent external dust and tungsten powder from entering the transmission components. The through-hole on the lower end face provides radial positioning of the drive shaft 33, ensuring the coaxiality of the grinding wheel's rotation. The gearbox 1 has an opening 13 on its side for maintenance and repair of the gear set 3. A gearbox cover 14 covers the opening 13, the size of which is adapted to fit the side opening 13. Bolt holes matching the edge of the gearbox opening 13 are provided on the edge of the cover to seal the internal space of the gearbox. A positioning structure is provided inside the cover to ensure coaxiality with the gearbox opening 13 when closed. A sealing gasket made of elastic rubber is placed between the gearbox cover 14 and the edge of the gearbox opening 13. The gasket edge has a sealing lip, and a corresponding groove is provided on the edge of the gearbox opening. When closed, the sealing lip is embedded in the groove, forming a double sealing structure to prevent external dust and tungsten powder from entering the gearbox and to prevent internal lubricating grease leakage. Two right-angle mounting seats 12 are symmetrically arranged on the outer walls of both sides of the gearbox 1. Each mounting seat includes two mutually perpendicular mounting plates. The mounting plate connected to the gearbox has a waist-shaped hole, and the mounting plate connected to the tungsten bar cleaning machine frame has a fixing hole. The mounting seats are fixed to the outer wall of the gearbox with bolts to ensure a secure connection. The waist-shaped hole allows for fine-tuning of the alignment accuracy between the equipment and the discharge port of the cleaning machine, ensuring that the cleaned tungsten strips can precisely enter between the two stainless steel wire wheels, avoiding uneven grinding caused by misalignment.

[0032] The drive unit 2 includes an adjustable speed motor 21 and a motor mounting base 22. It is a three-phase asynchronous adjustable speed motor with a suitable power and speed adjustment range. The output shaft end is machined with a keyway corresponding to the drive gear. The motor is equipped with an independent speed controller, which can adjust the speed in real time according to the tungsten oxide residue on the tungsten bar. For example, if the tungsten oxide residue is thick, the speed is increased to enhance removal efficiency; if the residue is thin, the speed is decreased to optimize polishing precision. The motor mounting base is made of high-strength steel, ensuring that the coaxiality of the motor output shaft and the through hole at the top of the gearbox meets the requirements after installation, guaranteeing no offset in power transmission.

[0033] The gear set 3 is located inside the gearbox 1. In this embodiment, it includes one drive gear 31 and two transmission gears 32 that are meshed together in sequence. Both the drive gear 31 and the transmission gears 32 are spur gears made of high-strength alloy material and have their tooth surface hardness enhanced by heat treatment. The parameters of the drive gear 31 and the transmission gears 32 are matched. The adjustable speed motor provides synchronous and stable rotational power to the grinding structure through the meshing of the drive gear 31 and the transmission gears 32.

[0034] The drive shaft 33 is designed to be partially located inside the gearbox 1 and partially extend outwards to connect with the grinding wheel 41. An annular groove for mounting a shaft retaining ring is machined on the shaft body corresponding to the through hole on the lower end face of the gearbox 1, and an external thread is machined on the shaft end for connection with the grinding wheel 41. The inner ring of the bearing mates with the drive shaft, and the outer ring mates with the through hole on the lower end face of the gearbox, effectively reducing the rotational friction coefficient of the drive shaft and ensuring smooth high-speed rotation. The retaining rings include a shaft retaining ring and a hole retaining ring. The shaft retaining ring is embedded in the annular groove of the drive shaft 33, restricting the drive shaft 33 from moving outwards from the gearbox; the hole retaining ring is embedded in the annular groove on the inner wall of the through hole on the lower end face of the gearbox, restricting the movement of the bearing 11. The combination of these two components ensures that the axial movement of the drive shaft 33 is controlled within a minimal range, guaranteeing a stable rotational trajectory for the grinding wheel 41.

[0035] In this embodiment, the grinding structure 4 includes two stainless steel wire wheels with an internal threaded hole at the center that matches the external thread of the drive shaft 33. The wire bundle is made of corrosion-resistant stainless steel and has an appropriate wire diameter, distribution density, and length, which can effectively scrape away tungsten oxide from the recesses on the surface of the tungsten strip without damaging the tungsten strip substrate. After assembly, the distance between the two stainless steel wire wheels can be adjusted according to the diameter of the tungsten strip to ensure full contact with the tungsten strip. When the wire bundle wears to a certain extent, it can be directly disassembled and replaced without disassembling the main body of the equipment.

[0036] This invention features a device with precise transmission. The gear set with matched parameters ensures synchronous rotation of the two grinding wheels, while the bearings and double retaining rings prevent drive shaft misalignment, thus solving the problems of uneven grinding and tungsten oxide residue. It is highly efficient and flexible in its application, with the dual-wheel clamping grinding efficiency far exceeding that of manual grinding. The adjustable-speed motor can adjust its speed according to the degree of oxidation and is compatible with tungsten bars of different specifications. It is easy to integrate into a production line, with a right-angle mounting base featuring a waist-shaped hole that can seamlessly connect with a cleaning machine, enabling continuous cleaning and grinding and avoiding losses during transport.

[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 tungsten bar grinding device, characterized in that, It includes a gearbox, a drive unit connected to the gearbox, a gear set disposed in the gearbox, and a grinding structure; The gear set includes a drive gear and at least two transmission gears that mesh with each other. The output end of the drive device is connected to the drive gear inside the gearbox. The grinding structure includes a grinding wheel corresponding to the transmission gear. The transmission gear is connected to the grinding wheel through a transmission shaft. The driving device drives the output end to rotate the driving gear, and through meshing, drives the transmission gear to rotate, thereby achieving the grinding wheel grinding the surface of the tungsten strip.

2. The tungsten bar grinding device according to claim 1, characterized in that, The lower end face of the gearbox is provided with a through hole for the transmission shaft to pass through. A bearing is installed in the through hole, the outer ring of the bearing is connected to the inner wall of the through hole, and the inner ring of the bearing is connected to the transmission shaft.

3. The tungsten bar grinding device according to claim 2, characterized in that, The bearing is provided with retaining rings on both sides to limit the passage of the drive shaft.

4. The tungsten bar grinding device according to claim 1, characterized in that, The grinding wheel is a stainless steel wire wheel, and a tungsten strip passes between two of the stainless steel wire wheels.

5. The tungsten bar grinding device according to claim 1, characterized in that, Right-angle mounting bases are symmetrically arranged on both outer walls of the gearbox. Each right-angle mounting base includes two mounting plates that are perpendicularly connected to each other. The two mounting plates are respectively connected to the gearbox and the external frame.

6. The tungsten bar grinding device according to claim 1, characterized in that, The gearbox has an opening on its side, and a gearbox cover is fitted at the opening to seal the internal space of the gearbox; a sealing gasket is provided between the gearbox cover and the edge of the opening to fill the gap between them.

7. The tungsten bar grinding device according to claim 1, characterized in that, The drive device includes an adjustable speed motor and a motor mounting base; one end of the motor mounting base is connected to the top outer wall of the gearbox, and the other end is connected to the adjustable speed motor; the output end of the adjustable speed motor extends through the motor mounting base into the gearbox and is connected to the drive gear.

8. The tungsten bar grinding device according to claim 1, characterized in that, The grinding wheel is detachably connected to the drive shaft. The outer side of the end of the drive shaft is provided with an external thread or a groove. The grinding wheel is provided with an internal thread hole that matches the external thread or a snap-fit ​​part that matches the groove.

9. The tungsten bar grinding device according to claim 3, characterized in that, The retaining ring includes a retaining ring for the shaft and a retaining ring for the hole. The surface of the drive shaft is provided with an annular groove for fitting the retaining ring for the shaft, and the inner wall of the through hole is provided with an annular groove for fitting the retaining ring for the hole.

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