A vacuum brazing apparatus for PCBN inserts

Abstract

This utility model relates to the field of welding equipment, specifically to a vacuum welding device for PCBN cutting tools. It includes a welding chamber, within which a heating system and a cooling system are installed. A vacuum system and a control system connected to the welding chamber are located outside the chamber. The cooling system includes a nitrogen delivery mechanism, a nitrogen cooling mechanism, and a mounting plate. The nitrogen delivery mechanism and the nitrogen cooling mechanism are connected by a pipe. The mounting plate is located at the lower end of the welding chamber. A C-shaped groove is provided on the upper surface of the mounting plate, and a C-shaped block is placed within the C-shaped groove. A lifting mechanism connected to the C-shaped block is located at the lower end of the C-shaped groove. A C-shaped ring is rotatably installed inside the C-shaped block, and a reciprocating rotation mechanism connected to the C-shaped ring is provided on the C-shaped block. Multiple air jets are evenly arranged inside the C-shaped ring, which is connected to a gas supply hose. The gas supply hose is connected to the nitrogen cooling mechanism. This utility model has the advantage of uniform cooling of PCBN cutting tools.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment, and in particular to a vacuum welding device for PCBN blades. Background Technology

[0002] PCBN is a polycrystalline cubic boron nitride material synthesized artificially under high temperature and pressure. Its characteristics include ultra-high hardness, excellent thermal stability, chemical inertness, and wear resistance. As a representative of modern superhard cutting tool materials, PCBN inserts have irreplaceable advantages in the field of cutting difficult-to-machine materials. The manufacturing process of PCBN inserts includes vacuum welding. The vacuum welding process includes vacuuming, heating, heat preservation, and cooling. Among them, the uniformity of cooling is one of the factors that determines the welding quality. Therefore, it is necessary to design a vacuum welding device for PCBN inserts with uniform cooling. Summary of the Invention

[0003] The purpose of this invention is to provide a vacuum welding device for PCBN cutting tools, which has the advantage of uniform cooling of PCBN cutting tools.

[0004] The technical solution adopted is as follows:

[0005] A vacuum welding apparatus for PCBN blades includes a welding chamber, a heating system and a cooling system inside the welding chamber, and a vacuum system and a control system connected to the welding chamber outside the welding chamber. The cooling system includes a nitrogen delivery mechanism, a nitrogen cooling mechanism and a mounting plate. The nitrogen delivery mechanism and the nitrogen cooling mechanism are connected by a pipe. The mounting plate is located at the lower end of the welding chamber. A C-shaped groove is provided on the upper surface of the mounting plate. A C-shaped block is provided in the C-shaped groove. A lifting mechanism connected to the C-shaped block is provided at the lower end of the C-shaped groove. A C-shaped ring is rotatably provided inside the C-shaped block. A reciprocating rotation mechanism connected to the C-shaped ring is provided on the C-shaped block. Multiple air jet pipes are evenly arranged inside the C-shaped ring. The C-shaped ring is connected to a gas supply hose, which is connected to the nitrogen cooling mechanism.

[0006] Preferably, the lifting mechanism includes multiple vertically extending electric telescopic rods, which extend and retract synchronously.

[0007] Preferably, the reciprocating rotation mechanism includes a reciprocating motor, which is fixedly mounted on the C-shaped block. The reciprocating motor is equipped with a drive gear, and the C-shaped ring is coaxially equipped with an arc-shaped rack, which meshes with the drive gear.

[0008] Preferably, the air supply hose is a steel wire braided hose.

[0009] Compared to existing technologies, the advantages are:

[0010] The C-ring is raised to the same level as the PCBN tool using a lifting mechanism. The reciprocating rotation mechanism drives the C-ring to rotate back and forth within a 30-degree range. The cooling system supplies cooled nitrogen gas to the C-ring, which then sprays the nitrogen gas evenly onto the PCBN tool, achieving uniform cooling of the PCBN tool. Attached Figure Description

[0011] Figure 1 This is a front view schematic diagram of a vacuum welding device for PCBN blades according to this utility model.

[0012] Figure 2 This is a three-dimensional structural diagram of the mounting plate of a vacuum welding device for PCBN blades according to this utility model.

[0013] Figure 3 This is a top view of the mounting plate of a vacuum welding device for PCBN blades according to this utility model.

[0014] In the diagram: 1. Welding cavity; 2. Heating system; 3. Control system; 4. Vacuum system; 5. Mounting plate; 6. Nitrogen delivery mechanism; 7. Nitrogen cooling mechanism; 8. C-groove; 9. C-block; 10. Electric telescopic rod; 11. C-ring; 12. Reciprocating motor; 13. Drive gear; 14. Arc rack; 15. Jet pipe. Detailed Implementation

[0015] The present invention will be further described below with reference to specific embodiments, such as... Figures 1 to 3 As shown:

[0016] Example 1: A vacuum welding apparatus for PCBN cutting tools includes a welding chamber 1, a heating system 2 and a cooling system disposed inside the welding chamber 1, and a vacuum system 4 and a control system 3 disposed outside the welding chamber 1 and connected to the welding chamber 1. The heating system 2 heats the inside of the welding chamber 1, the cooling system cools the welded PCBN cutting tool, the vacuum system 4 evacuates the inside of the welding chamber 1, and the control system 3 controls the operation of the vacuum system 4, the heating system 2 and the cooling system.

[0017] The cooling system includes a nitrogen delivery mechanism 6, a nitrogen cooling mechanism 7, and a mounting plate 5. The nitrogen delivery mechanism 6 and the nitrogen cooling mechanism 7 are connected by a pipeline. The nitrogen delivery mechanism 6 delivers nitrogen to the nitrogen cooling mechanism 7. After cooling, the nitrogen is delivered into the welding cavity 1. The mounting plate 5 is located at the lower end of the inside of the welding cavity 1. A C-shaped groove 8 is provided on the upper surface of the mounting plate 5. A C-shaped block 9 is provided in the C-shaped groove 8. A lifting mechanism connected to the C-shaped block 9 is provided at the lower end of the inside of the C-shaped groove 8.

[0018] The lifting mechanism controls the raising and lowering of the C-block 9. When cooling the PCBN tool, the C-block 9 is raised to a position flush with the PCBN tool. The notch of the C-block 9 is used to allow the PCBN tool to pass through the clamp. The C-block 9 has a rotating C-ring 11 inside. The C-block 9 is equipped with a reciprocating rotation mechanism connected to the C-ring 11. The reciprocating rotation mechanism drives the C-ring 11 to rotate reciprocally within a rotation range of 30 degrees. Multiple air jet pipes 15 are evenly arranged inside the C-ring 11. The C-ring 11 is connected to a gas supply hose, which is connected to a nitrogen cooling mechanism 7. The cooling system supplies cooled nitrogen to the C-ring 11. The reciprocating C-ring 11 evenly sprays nitrogen onto the PCBN tool, achieving uniform cooling of the PCBN tool.

[0019] Example 2: A vacuum welding apparatus for PCBN blades includes a welding chamber 1, a heating system 2 and a cooling system disposed inside the welding chamber 1, and a vacuum system 4 and a control system 3 disposed outside the welding chamber 1 and connected to the welding chamber 1. The heating system 2 heats the inside of the welding chamber 1, the cooling system cools the welded PCBN blade, the vacuum system 4 evacuates the inside of the welding chamber 1, and the control system 3 controls the operation of the vacuum system 4, the heating system 2 and the cooling system.

[0020] The cooling system includes a nitrogen delivery mechanism 6, a nitrogen cooling mechanism 7, and a mounting plate 5. The nitrogen delivery mechanism 6 and the nitrogen cooling mechanism 7 are connected by a pipeline. The nitrogen delivery mechanism 6 delivers nitrogen to the nitrogen cooling mechanism 7. After cooling, the nitrogen is delivered into the welding cavity 1. The mounting plate 5 is located at the lower end of the inside of the welding cavity 1. A C-shaped groove 8 is provided on the upper surface of the mounting plate 5. A C-shaped block 9 is provided in the C-shaped groove 8. A lifting mechanism connected to the C-shaped block 9 is provided at the lower end of the inside of the C-shaped groove 8. The lifting mechanism includes multiple vertically extending electric telescopic rods 10, which extend and retract synchronously.

[0021] The lifting mechanism controls the C-block 9 to rise and fall. When cooling the PCBN tool, the C-block 9 rises to a position flush with the PCBN tool. The notch of the C-block 9 is used for the clamping of the PCBN tool. The C-block 9 is equipped with a C-ring 11 for rotation. The C-block 9 is equipped with a reciprocating rotation mechanism connected to the C-ring 11. The reciprocating rotation mechanism includes a reciprocating motor 12, which is fixedly mounted on the C-block 9. The reciprocating motor 12 is equipped with a drive gear 13. The C-ring 11 is coaxially equipped with an arc-shaped rack 14, which meshes with the drive gear 13.

[0022] The reciprocating rotation mechanism drives the C-shaped ring 11 to reciprocate within a rotation range of 30 degrees. Multiple air jet pipes 15 are evenly arranged inside the C-shaped ring 11. The C-shaped ring 11 is connected to a gas supply hose, which is connected to the nitrogen cooling mechanism 7. The gas supply hose is a steel wire braided tube. The cooling system supplies cooled nitrogen to the C-shaped ring 11. The reciprocating C-shaped ring 11 sprays nitrogen evenly onto the PCBN tool, achieving uniform cooling of the PCBN tool.

[0023] The working principle is as follows:

[0024] The PCBN tool is placed in the welding chamber 1 and the welding chamber 1 is sealed. The vacuum system 4 evacuates the welding chamber 1 to a vacuum state. The heating system 2 heats the welding chamber 1 and then keeps it at a certain temperature to weld the PCBN tool. When cooling is required after welding, the lifting mechanism raises the C-ring 11 to a position flush with the PCBN tool. The reciprocating rotation mechanism drives the C-ring 11 to reciprocate within a 30-degree rotation range. The cooling system supplies cooled nitrogen gas to the C-ring 11. The C-ring 11 sprays the nitrogen gas evenly onto the PCBN tool to achieve uniform cooling of the PCBN tool.

[0025] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A vacuum brazing apparatus for PCBN inserts, characterised in that: The system includes a welding cavity (1), a heating system (2) and a cooling system inside the welding cavity (1), and a vacuum system (4) and a control system (3) connected to the welding cavity (1) outside the welding cavity (1). The cooling system includes a nitrogen delivery mechanism (6), a nitrogen cooling mechanism (7) and a mounting plate (5). The nitrogen delivery mechanism (6) and the nitrogen cooling mechanism (7) are connected by a pipe. The mounting plate (5) is located at the lower end of the welding cavity (1), and the upper surface of the mounting plate (5) is provided with There is a C-shaped groove (8), and a C-shaped block (9) is provided inside the C-shaped groove (8). A lifting mechanism connected to the C-shaped block (9) is provided at the lower end of the C-shaped groove (8). A C-shaped ring (11) is rotatably provided inside the C-shaped block (9). A reciprocating rotation mechanism connected to the C-shaped ring (11) is provided in the C-shaped block (9). Multiple jet pipes (15) are evenly arranged inside the C-shaped ring (11). A gas supply hose is connected to the C-shaped ring (11). The gas supply hose is connected to the nitrogen cooling mechanism (7).

2. A vacuum bonding apparatus for PCBN inserts as claimed in claim 1, characterised in that: The lifting mechanism includes multiple vertically extending electric telescopic rods (10), which extend and retract synchronously.

3. A vacuum bonding apparatus for PCBN inserts as claimed in claim 1, wherein: The reciprocating rotation mechanism includes a reciprocating motor (12), which is fixedly mounted on the C-shaped block (9). The reciprocating motor (12) is equipped with a drive gear (13), and the C-shaped ring (11) is coaxially equipped with an arc-shaped rack (14), which meshes with the drive gear (13).

4. A vacuum bonding apparatus for PCBN inserts as claimed in claim 1, wherein: The air supply hose is a steel wire braided hose.

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