Graphite electrode and carbon electrode end face flattening device

Abstract

A hydraulic slip ring is mounted on a mounting disc at the front end of a spindle, a central cutter assembly is mounted on the end face of the hydraulic slip ring, an annular cutter head is mounted on the hydraulic slip ring through a central round hole of the annular cutter head, and a plurality of cutter pushing devices and long-strip fine cutter bodies are mounted on the forward face of the annular cutter head. Each push-type broach device corresponds to one push-type broach oil cylinder, a section of oil pipeline is arranged in the main shaft, the annular cutter head is provided with a plurality of groups of two-section oil pipelines, each group of two-section pipelines corresponds to one push-type broach oil cylinder, and one ends of the oil inlet pipe and the oil return pipe are connected with oil inlets and oil outlets of the push-type broach oil cylinders; and the first-section oil pipeline, the second-section oil pipeline and the hydraulic slip ring form an oil path of the push broach oil cylinder. According to the invention, multiple groups of cutter bodies can be automatically replaced, the production line parking period is prolonged, the efficiency is improved, the electrode loss rate is reduced, and the device is suitable for flattening various electrode end surfaces.

Description

Technical Field

[0001] This invention relates to the field of electrode processing technology, specifically to a graphite electrode and a device for flattening the end face of a carbon electrode. Background Technology

[0002] Carbon electrode manufacturing requires surface and end-face treatment. Existing carbon electrode manufacturing machines typically use milling machines, boring machines, or sawing machines for end-face flattening, integrating this process into the production line as a single step to improve overall electrode manufacturing efficiency. However, the drawbacks of using existing flattening equipment are high wear rates on the electrode end faces, resulting in significant material loss, economic losses, and low efficiency. In particular, this process causes severe tool wear, requiring frequent tool changes. Tool replacement necessitates shutdown, leading to production line downtime and severely impacting the overall production rhythm. Summary of the Invention

[0003] To address the aforementioned problems, this invention proposes a graphite electrode and carbon electrode end face flattening device. Multiple sets of cutter bodies are arranged on the cutter disc, and each set of cutter bodies is propelled by a hydraulic cylinder to extend and retract, so that the cutter bodies not in operation automatically replace the worn cutter bodies to flatten the end faces. The overall hydraulic circuit is designed to supply oil to the hydraulic cylinder when the cutter disc rotates.

[0004] To achieve the above objectives, the following technical solution is adopted: a graphite electrode and carbon electrode end face flattening device, including a feed bed, a spindle box, and a spindle motor. The spindle is mounted in the spindle box and driven by the spindle motor. The device is characterized in that a hydraulic slip ring is mounted on the mounting disc at the front end of the spindle, a center tool assembly is mounted on the end face of the hydraulic slip ring, and an annular cutter disc is mounted on the hydraulic slip ring through its central hole. Several pusher devices are mounted on the front face of the annular cutter disc. Several long precision cutter bodies are arranged along the edge of its central hole towards its outer edge. The long precision cutter bodies are mounted on their corresponding pusher devices. Each pusher device corresponds to a pusher cylinder. The pusher cylinder is mounted on the back face of the annular cutter disc and connected to the pusher device.

[0005] The spindle has an internal oil pipeline, which includes a supply oil pipeline and a return oil pipeline. One end of the supply oil pipeline and the return oil pipeline are connected to a hydraulic slip ring, and the other end is connected to a hydraulic distributor. The annular cutter head has several sets of two-section oil pipelines. Each set of two-section oil pipelines includes an inlet oil pipeline and a return oil pipeline. Each set of two-section oil pipelines corresponds to a pusher cylinder. One end of the inlet oil pipeline and the return oil pipeline are connected to the inlet and outlet of the pusher cylinder. The other end of the inlet and outlet of each set of two-section oil pipelines is connected to a hydraulic slip ring. The first oil pipeline, the second oil pipeline, and the hydraulic slip ring form the oil circuit of the pusher cylinder.

[0006] Furthermore, the center cutter assembly includes a center cutter sleeve and a center cutter, with the center cutter sleeve mounted on the end face of the hydraulic slip ring and the center cutter mounted on the end face of the center cutter sleeve.

[0007] Furthermore, there is a gap between the long, thin precision cutter body located at one end of the central hole of the annular cutter disc and the central cutter sleeve. The end of the central cutter body that is away from the center of the central cutter sleeve extends beyond the outer edge of the central cutter sleeve. The extended part is the gap compensation part, and the length of the gap compensation part is greater than the gap.

[0008] Furthermore, the gap compensation section is located between two adjacent long precision cutting bodies.

[0009] Furthermore, the pusher device includes two pusher blocks and a pusher body. The two pusher blocks are mounted on the annular cutter disc and form a mounting groove. Each pusher block is provided with several cutter body fixing bolts. The pusher body is installed in the mounting groove formed by the pusher block, and the long precision cutter body is installed on the pusher body.

[0010] Furthermore, the hydraulic push rod of the pusher cylinder is connected to the pusher body.

[0011] Furthermore, the annular cutter head is provided with a pusher guide post, which is located in the mounting groove formed by the pusher stop and is connected to the pusher body.

[0012] Furthermore, the inlet and return oil pipes of the two-section oil pipeline are located within the mounting groove formed by the pusher stop.

[0013] Furthermore, a hydraulic distributor is installed at the tail end of the spindle.

[0014] Beneficial effects of this invention:

[0015] 1. The present invention designs the working flat-end cutter body as a long strip precision cutter body and a central cutter. The two cutter bodies are seamlessly connected on the plane swept by the rotating annular cutter disc and cover the entire electrode end face, reducing the motor loss rate and greatly improving the flattening efficiency and accuracy. It is suitable for round electrodes and square electrodes.

[0016] 2. This invention reconfigures the elongated precision cutting blades on the annular cutter head and equips them with a pusher device and a pusher cylinder. The pusher cylinder controls the extension and retraction of each elongated precision cutting blade, replacing worn elongated precision cutting blades, extending the downtime cycle, and increasing the efficiency by a factor of two.

[0017] 3. In order to solve the problem of oil circuit supply for pusher cylinder, the present invention designs the oil circuit by designing oil circuit inside the spindle and on the annular turntable, and forming a complete oil circuit through the connection of hydraulic slip rings, which is connected to pusher cylinder to realize oil supply.

[0018] In summary, this invention enables automatic replacement of multiple sets of cutting tools, extends production line downtime, improves efficiency, reduces electrode wear rate, and is suitable for various electrode end face flatness. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is the front view of the present invention;

[0021] Figure 3 for Figure 2 A schematic diagram of the BB side;

[0022] Figure 4 This is a schematic diagram of the annular cutter head structure.

[0023] Figure 5 This is the main view of the annular cutter head;

[0024] Figure 6 for Figure 5 Schematic diagram of surface AA;

[0025] Figure 7 This is a partial structural disassembly diagram of a ring chuck;

[0026] Figure 8 for Figure 7 EE surface diagram;

[0027] Figure 9 for Figure 4 Enlarged view of point C.

[0028] As shown in the figure: 1. Feed bed; 2. Spindle box; 3. Spindle motor; 4. Spindle; 5. Annular cutter head; 6. Multiple sets of long precision cutter bodies; 7. Center cutter sleeve; 8. Center cutter; 9. Pusher stop; 10. Pusher body; 11. Oil supply line; 12. Oil return line; 13. Hydraulic slip ring; 14. Pusher cylinder; 15. Pusher guide column; 16. Oil inlet pipe; 17. Oil return pipe; 18. Hydraulic distributor; 19. Cutter body fixing bolts; 400. Mounting disc. Detailed Implementation

[0029] Example

[0030] The following explanation, in conjunction with the accompanying drawings, further clarifies the matter. Figure 1-9 This is a schematic diagram of the example. The graphite electrode and carbon electrode end face flattening device shown in the figure includes a feed bed 1, a spindle box 2, a spindle motor 3, a spindle 4, an annular cutter head 5, a central cutter assembly, multiple sets of long precision cutter bodies 6, and a corresponding retraction device; the central cutter assembly includes a central cutter sleeve 7 and a central cutter 8; the pusher device includes two pusher blocks 9 and a pusher body 10; the spindle 4 has an oil pipeline inside, which includes an oil supply pipeline 11 and an oil return pipeline 12.

[0031] Assembly of the leveling device: The spindle housing 2 is installed on the feed bed 1, the spindle 4 is installed inside the spindle housing 2, the spindle motor 3 and the spindle 4 are connected through a transmission medium, a hydraulic slip ring 13 is installed on the mounting disc 400 at the front end of the spindle 4, a center tool sleeve 7 is installed on the end face of the hydraulic slip ring 13, and a center tool 8 is installed on the end face of the center tool sleeve 7. In this embodiment, six sets of pusher devices are installed on the front face of the annular cutter head 5. Six long precision cutter bodies 6 are arranged along the edge of the central circular hole of the annular cutter head 5 towards its outer edge. Two pusher blocks 9 of the pusher device are installed on the annular cutter head 5 and form a mounting groove. Several tool body fixing bolts 19 are provided on any one of the pusher blocks 9. The pusher body 10 is installed in the mounting groove formed by the pusher block 9. The long precision cutter body 6 is installed on the pusher body 10. Each pusher device corresponds to a pusher cylinder 14. The pusher cylinder 14 is installed on the back face of the annular cutter head 5 and its hydraulic push rod is connected to the pusher body 10. The annular cutter head 5 is provided with a pusher guide post 15 for guiding the extension and retraction of the pusher body 10. The pusher guide post 15 is located in the mounting groove formed by the pusher stop 9 and is connected to the pusher body 10.

[0032] When arranging the elongated precision cutter body 6 and the central cutter 8, there is a gap between the end of the elongated precision cutter body 6 located at the center hole of the annular cutter disc 5 and the central cutter sleeve 7. The end of the central cutter 8 that is away from the center of the central cutter sleeve 7 extends beyond the outer edge of the central cutter sleeve 7. The extended part is the gap compensation part. The length of the gap compensation part is greater than the gap. The gap compensation part is located between two adjacent elongated precision cutter bodies 6, ensuring that the surface swept by the rotation of the elongated precision cutter body 6 and the central cutter 8 is a complete surface without missing any flat points.

[0033] The six pusher cylinders 14 require six sets of hydraulic circuits. The annular cutter head 5 has six sets of two-stage hydraulic lines. Each set of two-stage hydraulic lines includes an inlet pipe 16 and a return pipe 17. Each set of two-stage hydraulic lines corresponds to one pusher cylinder 14. The inlet pipe 16 and the return pipe 17 of the two-stage hydraulic lines are located in the mounting groove formed by the pusher stop 9. One end of the inlet pipe 16 and the return pipe 17 of each set of two-stage hydraulic lines is connected to the oil inlet and outlet of the pusher cylinder 14, and the other end of the inlet pipe 16 and the outlet pipe 17 of each set of two-stage hydraulic lines is connected to the hydraulic slip ring 13. One end of the supply pipe 11 and the return pipe 12 of the first-stage hydraulic line is connected to the hydraulic slip ring 13, and the other end is connected to the hydraulic distributor 18. The hydraulic distributor 18 is installed at the tail end of the spindle 4. The first-stage hydraulic line, the second-stage hydraulic line, and the hydraulic slip ring 14 form the hydraulic circuit of the pusher cylinder 14, which is used to supply oil to the retraction cylinder 14. The oil circuits of the pusher cylinder 14 are all designed as internal oil circuits, which solves the problem of external oil circuits becoming entangled when the annular cutter head 5 rotates.

[0034] Working Principle: This device is connected to a control center, which has a corresponding control program to perform the replacement of the long, thin precision cutting tool body 6. When the electrode end face reaches the flattening position, the feed bed 1 feeds the annular cutter head 5 to the electrode end face position. One set of pusher cylinders 14 actuates, pushing out the pusher body 10. At this time, only one set of long, thin precision cutting tool bodies 6 is the actual working flattening tool body. This long, thin precision cutting tool body 6 and the center cutter 8 are located at the flattening electrode end face position. The spindle motor 3 works, driving the spindle 4 to rotate, thereby the long, thin precision cutting tool body 6 and the center cutter 8 rotate and grind the electrode end face. The feed bed 1 adjusts the grinding feed rate accordingly. After the long, thin-blade cutter body 6 reaches the preset number of rotations, its corresponding pusher cylinder 14 pushes back, driving the long, thin-blade cutter body 6 to push back as well. At the same time, another set of pusher cylinders 14 actuates, pushing out its corresponding pusher body 10, which then continues to work in rotation with its corresponding long, thin-blade cutter body 6. This allows for the replacement of the long, thin-blade cutter body 6 without stopping the machine. When all six sets of long, thin-blade cutter bodies 6 are worn out, the machine stops, and all six long, thin-blade cutter bodies 6 are replaced at once, extending the downtime cycle by six times and greatly improving work efficiency.

[0035] This invention is not limited to this embodiment. Any equivalent concept or modification within the technical scope disclosed in this invention shall be included within the protection scope of this invention.

Claims

1. A graphite electrode and carbon electrode end face flattening device, comprising a feed bed (1), a spindle housing (2), and a spindle motor (3), wherein the spindle housing (2) houses the spindle (4), and the spindle (4) is driven by the spindle motor (3), characterized in that, A hydraulic slip ring (13) is installed on the mounting disc (400) at the front end of the spindle (4). A central tool assembly is installed on the end face of the hydraulic slip ring (13). The annular cutter disc (5) is installed on the hydraulic slip ring (13) through its central hole. Several pusher devices are installed on the front face of the annular cutter disc (5). Several long precision cutter bodies (6) are arranged along the edge of its central hole to its outer edge. The long precision cutter bodies (6) are installed on their corresponding pusher devices. Each pusher device corresponds to a pusher cylinder (14). The pusher cylinder (14) is installed on the back face of the annular cutter disc (5) and connected to the pusher device. The spindle (4) is provided with an oil pipeline, which includes an oil supply pipeline (11) and an oil return pipeline (12). One end of the oil supply pipeline (11) and the oil return pipeline (12) is connected to a hydraulic slip ring (13), and the other end is connected to a hydraulic distributor (18). The annular cutter head (5) is provided with several sets of two-section oil pipelines. Each set of two-section oil pipelines includes an oil inlet pipe (16) and an oil return pipe (17). Each set of two-section pipelines corresponds to a pusher cylinder (14), and one end of the oil inlet pipe (16) and the oil return pipe (17) is connected to the oil inlet and oil outlet of the pusher cylinder (14). The other end of the oil inlet pipe (16) and the oil outlet pipe (17) of each set of two-section oil pipelines is connected to a hydraulic slip ring (13). The first oil pipeline, the second oil pipeline and the hydraulic slip ring form the oil circuit of the pusher cylinder (14).

2. The ink electrode and carbon electrode end face flattening device according to claim 1, characterized in that, The central cutter assembly includes a central cutter sleeve (7) and a central cutter (8). The central cutter sleeve (7) is mounted on the end face of the hydraulic slip ring (13), and the central cutter (8) is mounted on the end face of the central cutter sleeve (7).

3. The ink electrode and carbon electrode end face flattening device according to claim 2, characterized in that, The long precision cutter body (6) has a gap between one end of the central hole of the annular cutter disc (5) and the central cutter sleeve (7). The central cutter (8) extends beyond the outer edge of the central cutter sleeve (7) at one end away from the center of the central cutter sleeve (7). The extended part is the gap compensation part, and the length of the gap compensation part is greater than the gap.

4. The ink electrode and carbon electrode end face flattening device according to claim 3, characterized in that, The gap compensation section is located between two adjacent long precision cutting bodies (6).

5. The graphite electrode and carbon electrode end face flattening device according to claim 1, characterized in that, The pusher device includes two pusher blocks (9) and a pusher body (10). The two pusher blocks (9) are mounted on the annular cutter disc (5) and form a mounting groove. Each pusher block (9) is provided with several cutter body fixing bolts (19). The pusher body (10) is installed in the mounting groove formed by the pusher blocks (9). The long precision cutter body (6) is installed on the pusher body (10).

6. The graphite electrode and carbon electrode end face flattening device according to claim 5, characterized in that, The hydraulic push rod of the pusher cylinder (14) is connected to the pusher body (10).

7. The graphite electrode and carbon electrode end face flattening device according to claim 6, characterized in that, The annular cutter head (5) is provided with a pusher guide post (15), which is located in the mounting groove formed by the pusher stop (9) and is connected to the pusher body (10).

8. The graphite electrode and carbon electrode end face flattening device according to claim 7, characterized in that, The inlet pipe (16) and return pipe (17) of the two oil pipelines are located in the mounting groove formed by the pusher stop (9).

9. The graphite electrode and carbon electrode end face flattening device according to any one of claims 1-8, characterized in that, The hydraulic distributor (18) is installed at the tail end of the spindle (4).

Images