Quenching device for workpiece with deep blind hole

Abstract

The utility model relates to a deep blind hole workpiece quenching device which is characterized by comprising a lifting appliance and an inner spraying quenching furnace body, the inner spraying quenching furnace body is adopted for efficient quenching, the problem that air in an inner cavity of a deep blind hole workpiece can not be exhausted in the immersion process is solved through precise matching of the guide ring and the lifting appliance, the layout design of the oil spraying nozzles and the efficient oil way design, and the through quenching depth and the cooling uniformity are remarkably improved. A special high-efficiency clamp is adopted in the hoisting process, double-clamp type hoisting is creatively designed, and the problems that hoisting rings need to be welded during quenching hoisting of large workpieces, and the hoisting efficiency is low are solved. The quenching device for the workpiece with the deep blind hole has the advantages of being good in stability, easy to operate, beneficial to batch high-quality quenching and high in universality.

Description

Technical Field

[0001] This utility model belongs to the field of machining technology, specifically relating to a quenching device for deep blind hole workpieces, used for quenching treatment of deep blind hole metal workpieces. Background Technology

[0002] Currently, most quenching methods for deep blind hole metal workpieces involve batch immersion in a cage. However, considering that the internal cavity of deep blind hole workpieces may not be able to expel air during immersion, it is easy to cause uneven material properties or deformation, which may not meet the process requirements and ultimately lead to the scrapping of the workpieces, rendering them unusable. Utility Model Content

[0003] This utility model provides a quenching device for deep blind hole workpieces. The technical problem to be solved is: to solve the problem of workpiece scrap caused by uneven material properties or deformation due to residual gas in the workpiece cavity during the quenching process of deep blind hole metal workpieces.

[0004] To solve the above technical problems, this utility model provides a quenching device for deep blind hole workpieces, including an internal spray quenching furnace body, characterized in that: the internal spray quenching furnace body includes a guide ring (44), an oil nozzle (47) and a furnace frame (48); the guide ring (44) is fixed to the top of the furnace frame (48), the oil nozzle (47) is inside the furnace frame (48), and the opening end of the deep blind hole workpiece is concentrically arranged with the oil nozzle (47); the side wall of the furnace frame (48) is provided with a flow hole (45) for quenching oil circulation.

[0005] It also includes a lifting device, which includes a cover plate (36), a clamping plate (38), a connecting plate (39), and a straightening clamp (42); the clamping plate (38) is fixed between the cover plate (36) and the connecting plate (39), and one end of the straightening clamp (42) is hinged to the connecting plate (39) by a pin (41), and the other end is fixed to the connecting plate by a movable pin (40).

[0006] Beneficial Effects: This utility model employs a dedicated internal spray quenching furnace for efficient quenching. Through precise matching of the guide ring and lifting fixture, the layout design of the oil nozzles, and the efficient oil circuit design, it solves the problem of air not being completely expelled from the inner cavity of deep blind hole workpieces during immersion, significantly improving the quenching depth and cooling uniformity. A dedicated high-efficiency clamp is used during lifting, and a creative double-clamp lifting design solves the problems of welding lifting rings and low lifting efficiency for large workpieces during quenching. This deep blind hole workpiece quenching device has the advantages of good stability, simple operation, and suitability for high-quality batch quenching, and is highly versatile. Attached Figure Description

[0007] Figure 1 3D view of the internal spray quenching furnace body

[0008] Figure 2 Lifting gear diagram

[0009] Figure 3 Sectional view of the internal spray quenching furnace body

[0010] Figure 4 Schematic diagram of the assembly of a deep blind hole workpiece and a quenching device Detailed Implementation

[0011] To make the purpose, content and advantages of this utility model clearer, the specific embodiments of this utility model will be described in further detail below.

[0012] The present invention proposes a quenching device for deep blind hole workpieces, characterized in that it includes a lifting device and an internal spray quenching furnace body;

[0013] The lifting device includes a lifting ring (35), a cover plate (36), a positioning hole (37), a clamping plate (38), a connecting plate (39), a movable pin (40), a pin shaft (41), and a guide clamp (42);

[0014] The lifting ring (35) is located at the top of the lifting device and welded to the center of the cover plate (36); the clamping plate (38) is located between the cover plate (36) and the connecting plate (39). The positioning hole (37) passes through the cover plate (36), the clamping plate (38) and the connecting plate (39), and a positioning pin is inserted inside it to provide positioning when welding the cover plate (36), the clamping plate (38) and the connecting plate (39). The straightening clamp (42) is located at the entrance end of the clamping space, and the three guide plates below it match the outer contour of the workpiece step. One end of the straightening clamp (42) is hinged to the connecting plate (39) by a pin (41), and the other end is fixed to the connecting plate (39) by a movable pin (40). After closing, the movable pin (40) is inserted, and the upper end of the straightening clamp (42) bears the weight of the bottom step of the other half of the blind hole. One straightening clamp (42) is connected to each end of the connecting plate (39).

[0015] The internal spray quenching furnace body is composed of a furnace body lifting ring (43), a guide ring (44), a flow hole (45), an oil supply pipe (46), an oil nozzle (47), and a furnace body frame (48).

[0016] The furnace body lifting ring (43) is welded to the top of the furnace body frame (48), and the guide ring (44) is fixed to the inner side of the top edge of the furnace body frame (48) by welding; the oil nozzle (47) is installed at the end of the oil supply pipe (46) by a reducing diameter welding method; the main part of the oil supply pipe (46) passes through the furnace body frame (48) and is welded and fixed, and is connected to the external oil pump oil supply pipe through a flange. The oil pump inlet end is connected to the oil tank to form a closed-loop quenching oil circulation system. The flow hole (45) is directly opened on the side wall of the furnace body frame (48).

[0017] The opening end of the deep blind hole workpiece is concentrically set with the oil injector (47).

[0018] The internal spray quenching furnace body is set inside the oil tank.

[0019] The inner diameter of the guide ring (44) is clearance-fitted with the outer diameter of the lifting clamp (42).

[0020] The movable pin (40) is a quick-release pin with a rust-proof coating on its surface.

[0021] For initial use, first connect the overhead crane hook to the furnace body lifting ring (43) at the top of the internal spray quenching furnace body and lift it into the oil tank. The guide ring (44) at the top of the internal spray quenching furnace body should be exposed above the surface of the quenching oil in the oil tank, while the rest should be immersed in the quenching oil. Use bolts to connect one end of the oil delivery pipe (46) to the oil pump delivery pipe flange outside the oil tank. Connect the oil pump inlet to the oil tank to form a closed-loop quenching oil circulation system. After the internal spray quenching furnace body is fixed, subsequent mass production can begin.

[0022] When hoisting the workpiece, remove the movable pins (40) on both sides of the lifting device, open the centering clamp (42), insert the step on one side of the bottom of the blind hole of the workpiece between the cover plate (36) and the connecting plate (39), close the centering clamp (42), insert the movable pins (40), hook the crane hook into the lifting ring (35), and start the crane to hoist the workpiece to the upper end of the inward spray quenching furnace body. The application of this lifting device avoids the problem of needing to weld a lifting ring to the upper end of the workpiece while ensuring the quenching effect of the workpiece.

[0023] After the workpiece is hoisted to the upper part of the internal spray quenching furnace, it begins to fall. With the cooperation of six guide plates at the lower end of the workpiece lifting clamp (42), it can quickly enter the furnace even when the hoisting operation is swaying. At the same time, it can also ensure the concentric positioning of the workpiece opening end and the oil spray nozzle (47), ensuring the concentricity of the workpiece and the oil spray nozzle 47. After falling into place, the workpiece opening end covers the oil spray nozzle (47), and the crane hook is disengaged using the auxiliary tool. The lifting ring (35) is completely exposed in the oil tank, and the rest of the workpiece is immersed in the quenching oil in the furnace body along with the workpiece. When quenching begins, the oil spray nozzle (47) sprays oil upward to expel the air in the blind hole. The quenching oil inside the furnace body flows into the oil tank through the flow hole (45), realizing the efficient circulation of quenching oil.

[0024] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A deep blind hole workpiece quenching apparatus comprising an internal injection quenching furnace body, characterized in that: The inner spray quenching furnace body comprises a guide ring (44), a spray nozzle (47) and a furnace body frame (48); the guide ring (44) is fixed on the top of the furnace body frame (48), the spray nozzle (47) is in the furnace body frame (48), and the opening end of the deep blind hole workpiece is arranged concentrically with the spray nozzle (47); the side wall of the furnace body frame (48) is provided with a through hole (45) for circulating quenching oil.

2. The deep blind hole workpiece quenching device of claim 1, wherein: The spray nozzle (47) is connected with an oil delivery pipe (46), and the oil delivery pipe (46) is connected with an external oil pump.

3. The deep blind hole workpiece quenching apparatus of claim 1, wherein: The top of the furnace body frame (48) is fixed with a furnace body lifting ring (43).

4. The deep blind hole workpiece quenching apparatus according to any one of claims 1-3, wherein: The lifting device further comprises a cover plate (36), a clamping plate (38), a connecting plate (39) and a guide clamp (42); the clamping plate (38) is fixed between the cover plate (36) and the connecting plate (39), one end of the guide clamp (42) is hinged to the connecting plate (39) through a pin shaft (41), and the other end is fixed with the connecting plate through a movable bolt (40).

5. The deep blind hole workpiece quenching apparatus of claim 4, wherein: The lower end of the guide clamp is provided with a guide plate matched with the steps of the workpiece.

6. The deep blind hole workpiece quenching apparatus of claim 4, wherein: The center of the cover plate (36) is fixed with a lifting ring (35).

7. The deep blind hole workpiece quenching apparatus of claim 5, wherein: Two guide clamps (42) are symmetrically arranged at the two ends of the connecting plate.

8. The deep blind hole workpiece quenching apparatus of claim 2, wherein: The inner spray quenching furnace body is arranged in an oil tank, an oil inlet end of an external oil pump is connected with the oil tank, and a closed-loop quenching oil circulation system is formed.

9. The deep blind hole workpiece quenching apparatus of claim 4, wherein: The inner diameter of the guide ring (44) is gap-fitted with the outer diameter of the guide clamp (42) of the lifting device.

10. The deep blind hole workpiece quenching apparatus of claim 4, wherein: The movable bolt (40) is a quick-release bolt, and the surface is plated with a rust-proof coating.

Images