CN-224227129-U - Continuous heat treatment device for large-batch metal fasteners

Abstract

The utility model discloses a continuous heat treatment device for a large number of metal fasteners, which comprises a heat treatment frame and a first conveying mechanism, wherein a pre-cooling frame is fixedly connected between two adjacent heat treatment frames, a second conveying mechanism is arranged at the inner bottom side of the pre-cooling frame, feed inlets are formed in both sides of the pre-cooling frame, first grooves are formed in both sides of the pre-cooling frame, a support is fixedly connected in the first grooves, a guide fan is rotationally connected to the support, the pre-cooling frame is fixedly connected with an air duct on the first grooves, a liquid nitrogen bottle is arranged at one side of the air duct, an electric control valve is fixedly connected at one side of an outlet of the liquid nitrogen bottle, one end of the electric control valve is fixedly connected with a pipe fitting, and one end of the pipe fitting is communicated with the air duct.

Inventors

• LIU YUERONG
• LI NING
• WANG GUOQIANG

Assignees

• 连云港天舒热处理科技有限公司

Dates

Publication Date

20260512

Application Date

20250526

Claims (5)

1. 1. The utility model provides a continuous heat treatment device of large batch metal fastener, includes heat treatment frame (1) and first transport mechanism (2), its characterized in that, two are adjacent fixedly connected with precooling frame (3) between heat treatment frame (1), precooling frame (3) interior bottom is provided with second transport mechanism (4), feed inlet (5) have all been seted up to precooling frame (3) both sides, first recess (6) have all been seted up to precooling frame (3) both sides, fixedly connected with support in first recess (6), it is connected with air guide fan (7) to rotate on the support, precooling frame (3) are located fixedly connected with air duct (8) on first recess (6), air duct (8) one side are provided with liquid nitrogen bottle (9), liquid nitrogen bottle (9) export one side fixedly connected with automatically controlled valve (10), automatically controlled valve (10) one side fixedly connected with pipe fitting, pipe fitting one end communicates with each other with air duct (8), air duct (8) one side fixedly connected with nitrogen concentration sensor (13), air duct (8) are located first recess (6) fixedly connected with air duct (8) on one side, and two air duct (12) fixedly connected with air duct (12) are located between the relative air duct (12).
2. 2. A continuous heat treatment device for large-scale metal fasteners according to claim 1, characterized in that the two sides of the pre-cooling frame (3) are fixedly connected with fixing plates (14), and the fixing plates (14) are positioned between the first conveying mechanism (2) and the second conveying mechanism (4).
3. 3. A continuous heat treatment device for large-scale metal fasteners according to claim 2, characterized in that a support plate (15) is arranged in the second conveying mechanism (4), and the support plate (15) is fixedly connected in the pre-cooling frame (3).
4. 4. A continuous heat treatment device for large-scale metal fasteners according to claim 3, wherein the upper end of the pre-cooling frame (3) is fixedly connected with an electric push rod (16), the output end of the electric push rod (16) is fixedly connected with a sealing plate (17), and the sealing plate (17) corresponds to the feeding port (5).
5. 5. The continuous heat treatment device for large-batch metal fasteners according to claim 4, wherein the pre-cooling frame (3) is fixedly connected with an air guide cover (18) at one side of the first groove (6), an inclined plate (19) is fixedly connected in the air guide cover (18), and through holes are uniformly formed in the inclined plate (19).

Description

Continuous heat treatment device for large-batch metal fasteners Technical Field The utility model relates to the technical field of heat treatment of metal fasteners, in particular to a continuous heat treatment device for a large number of metal fasteners. Background The metal fastener firstly needs to pass through a heating zone, then austenitizing is completed at a precisely controlled temperature, then the metal fastener enters a quenching tank for rapid cooling to form a martensitic structure, then surface residues are cleaned and removed, finally quenching stress is eliminated in a tempering furnace, mechanical properties are adjusted, and the quality of products can be improved by batch treatment of the metal fastener. According to the continuous heat treatment device of large-batch metal fasteners, which is described in the Chinese patent publication No. CN220977087U, the pulling plate is pulled to drive the connecting rod, the connecting rod can drive the sliding block when moving fruit juice, the sliding block slides along the inner wall of the guide rail, the supporting plate can be driven when the sliding block moves, the supporting plate plays a role in temporarily supporting a workpiece, the supporting plate moves and can drive the anti-slip pad, the anti-slip pad plays a role in preventing the workpiece from slipping on the surface of the supporting plate, the connecting rod can drive the circular plate in the moving process, the circular plate can drive the limiting plate on the surface in the moving process, the connecting rod is pressed until the supporting plate is regulated to a specified position, the connecting rod is pulled at the moment, the limiting plate can be inserted along the surface of the rectangular hole until the limiting plate is clamped into the inner wall of the rectangular hole to stop, and the limiting plate plays a role in temporarily fixing the supporting plate. The conventional continuous heat treatment device for the metal fastener generally comprises key modules such as heating, conveying, cooling, drying and the like in the actual heat treatment process, and the production efficiency and the heat treatment quality are improved by adopting an automatic design, however, the metal fastener is generally higher in temperature in the heat treatment process, and severe heat stress can be caused due to overlarge temperature difference between the surface and the core part, so that the workpiece is deformed, cracks are generated, and the quality of the workpiece is affected. Disclosure of utility model Aiming at the defects in the prior art, the utility model provides a continuous heat treatment device for large-batch metal fasteners, which is used for reducing the deformation and crack phenomena of workpieces and improving the quality of the workpieces. The technical scheme includes that the continuous heat treatment device for large-scale metal fasteners comprises a heat treatment frame and a first conveying mechanism, a pre-cooling frame is fixedly connected between two adjacent heat treatment frames, a second conveying mechanism is arranged at the inner bottom side of the pre-cooling frame, feeding holes are formed in two sides of the pre-cooling frame, first grooves are formed in two sides of the pre-cooling frame, a support is fixedly connected in the first grooves, a guide fan is rotationally connected to the support, the pre-cooling frame is fixedly connected with an air duct on the first grooves, a liquid nitrogen bottle is arranged at one side of the air duct, an electric control valve is fixedly connected at one side of an outlet of the liquid nitrogen bottle, a pipe fitting is fixedly connected at one side of the electric control valve, one end of the pipe fitting is communicated with the air duct, a nitrogen concentration sensor is fixedly connected at one side of the air duct, air inlet pipes are uniformly and fixedly connected with air inlet pipes between the two opposite connecting plates, the upper ends of the pre-cooling frame are fixedly connected with a water cooling frame, and the air inlet pipes are positioned in the water cooling frame. As a preferable technical scheme of the utility model, the two sides of the pre-cooling frame are fixedly connected with the fixing plates, and the fixing plates are positioned between the first conveying mechanism and the second conveying mechanism, so that the translation of the metal fastener can be facilitated by arranging the fixing plates. As a preferable technical scheme of the utility model, the second conveying mechanism is internally provided with the supporting plate, the supporting plate is fixedly connected in the pre-cooling frame, and further support can be provided for the metal fastener by arranging the supporting plate. As an optimized technical scheme of the utility model, the upper end of the pre-cooling frame is fixedly connected with the electric push rod, the output end of the electric push ro