Search

CN-122012895-A - Tempering heat preservation furnace for watch parts

CN122012895ACN 122012895 ACN122012895 ACN 122012895ACN-122012895-A

Abstract

The application relates to the field of tempering and heat preservation of parts, in particular to a tempering and heat preservation furnace for watch parts. The furnace comprises a furnace core component, a furnace body component, an oxygen isolation component and a temperature control component. The heating cavity of the furnace core component is in a vertical cylinder shape, a carrier tower of a multi-layer stacked part box is arranged in the cavity, the furnace body component comprises a shell, a heat insulation interlayer and a heating furnace liner, the oxygen insulation component realizes oxygen insulation through an air supply pipe and an exhaust pipe, and the temperature control component can accurately control the temperature. And a positioning piece, a sealing structure, a bearing and positioning structure, a circulating fan, a heat preservation layer and the like are also arranged. The application can effectively temper and preserve heat the watch parts, avoid oxidation by good sealing and temperature control, and uniformly heat by using the circulating fan, and meanwhile, the multi-layer structure can improve the treatment efficiency and ensure the technical effect of tempering quality.

Inventors

  • PENG YINGYING

Assignees

  • 上海靖和实业有限公司

Dates

Publication Date
20260512
Application Date
20260324

Claims (10)

  1. 1. A tempering furnace for watch parts, comprising: The furnace core assembly comprises a heated cavity (1), a cavity cover (2) and a carrier tower, wherein the heated cavity (1) is of a vertical cylindrical structure, the cavity cover (2) is matched with an opening at the top of the heated cavity (1), the carrier tower comprises a plurality of part boxes (3) which are arranged in a stacked mode along the vertical direction, and the carrier tower is arranged in the heated cavity (1); The furnace body assembly comprises a shell (6), a heat-insulating interlayer (7) and a heating furnace liner (8), wherein the shell (6) is of a vertical cylindrical structure, the wall of the shell (6) is provided with an inner cavity, the heat-insulating interlayer (7) is arranged in the inner cavity of the wall of the shell (6), the heating cavity (1) is at least partially contained in the shell (6), the heating furnace liner (8) is arranged in the shell (6) and is coaxially arranged with the shell (6), and the heating furnace liner (8) is electrically connected with an external power supply; The oxygen isolation assembly comprises an air supply pipe (9) and an exhaust pipe (10), wherein the exhaust pipe (10) is arranged at the top of the cavity cover (2), one end of the exhaust pipe (10) penetrates through the cavity cover (2) and is communicated with the heated cavity (1), the other end of the exhaust pipe is provided with an exhaust one-way valve, one end of the air supply pipe (9) is communicated with a fuel storage tank, the other end of the air supply pipe penetrates through the bottom of the heated cavity (1) and is communicated with the heated cavity (1), and the air supply pipe (9) is at least partially accommodated in the shell (6) and is internally provided with ethanol or methanol; The temperature control assembly comprises a thermocouple (11), a temperature controller and a solid-state relay, wherein the thermocouple (11) is fixedly connected with the shell (6), a measuring head of the thermocouple (11) penetrates through the shell (6) and stretches into the shell (6), the temperature controller is electrically connected with an external power supply, the temperature controller is in signal connection with the thermocouple (11), a control circuit of the temperature controller is in signal connection with an input circuit of the solid-state relay, and an output circuit of the solid-state relay is connected in series between the heating furnace liner (8) and the external power supply.
  2. 2. The tempering heat preservation furnace according to claim 1, wherein a positioning piece (4) is arranged between any two adjacent part boxes (3), the positioning piece (4) comprises a limiting check ring (401) and a positioning ring (402) arranged at the center of the inner wall of the limiting check ring (401), the inner diameter of the limiting check ring (401) is matched with the outer diameter of the part boxes (3), the outer diameter of the limiting check ring (401) is smaller than the inner diameter of the heated cavity (1), the annular width ‌ of the positioning ring (402) is matched with the thickness of the side wall of the part box (3), and a plurality of vent holes are formed in the bottom wall of the part box (3).
  3. 3. Tempering heat preservation oven according to claim 2, characterized in, that the carrier tower comprises at least three of the parts cassettes (3), wherein parts cassettes (3) at the top of the carrier tower and parts cassettes (3) at the bottom are used for holding scrap parts, and the remaining parts cassettes (3) are used for holding new parts to be tempered.
  4. 4. The tempering heat preservation furnace according to claim 1, wherein a supporting outer edge (101) is arranged at a position, close to the top, of the outer wall of the heated cavity (1), a supporting groove (102) is arranged at the bottom of the supporting outer edge (101), a first high-temperature-resistant pressing ring is arranged in the supporting groove (102) and is used for being in sealing fit with a cavity opening of the shell (6).
  5. 5. The tempering and holding furnace according to claim 4, wherein a cover groove (201) is formed in the bottom of the cavity cover (2), a second high-temperature-resistant pressing ring is arranged in the cover groove (201) and is used for forming sealing fit with an opening of the heated cavity (1), a sealing piece (202) is arranged below the cavity cover (2), the sealing piece (202) is fixedly connected with the cavity cover (2), a third high-temperature-resistant Wen Yajuan is arranged on the periphery of the sealing piece (202), the third high-temperature-resistant pressing ring is used for forming sealing fit with the inner wall of the heated cavity (1), and one end, far away from the exhaust one-way valve, of the exhaust pipe (10) penetrates through the sealing piece (202).
  6. 6. The tempering furnace according to claim 5, wherein a plurality of buffer sheets (203) are arranged below the sealing sheet (202) at intervals, the outer diameter of the buffer sheets (203) is smaller than the inner diameter of the heated cavity (1) and larger than three fourths of the inner diameter of the heated cavity (1), and the buffer sheets (203) are fixedly connected with the cavity cover (2).
  7. 7. The tempering and heat preserving furnace according to claim 1, wherein a furnace pipe bearing ring (601) is arranged at a position, close to the bottom, of the inner wall of the shell (6), a furnace pipe positioning ring (602) is arranged above the furnace pipe bearing ring (601), the furnace pipe bearing ring (601) is used for bearing the bottom of the heating furnace pipe (8), the inner diameter of the furnace pipe bearing ring (601) is matched with the inner diameter of the heating furnace pipe (8), the inner diameter of the furnace pipe positioning ring (602) is matched with the outer diameter of the heating furnace pipe (8), and a heat preserving gas layer is formed between the outer wall of the heating furnace pipe (8) and the inner wall of the shell (6).
  8. 8. The tempering furnace according to claim 1, wherein the furnace body assembly further comprises a circulating fan (12) and a driving motor (13), the circulating fan (12) comprises a wind bowl (1201) and blades (1202), the blades (1202) are fixedly connected with the inner wall of the wind bowl (1201), an opening of the wind bowl (1201) faces to the upper side of the shell (6), the wind bowl (1201) and the shell (6) are coaxially arranged, the driving motor (13) is arranged at the bottom of the shell (6), a shaft coupling (14) is arranged on an output shaft of the driving motor (13), and the shaft coupling (14) penetrates through the bottom of the shell (6) and is fixedly connected with the bottom wall of the wind bowl (1201).
  9. 9. The tempering heat preservation furnace according to claim 8, wherein the furnace body assembly further comprises a first heat preservation layer (15), the first heat preservation layer (15) is of a vertical round sleeve-shaped structure, the outer diameter of the first heat preservation layer (15) is smaller than the inner diameter of the heating furnace liner (8), the inner diameter of the first heat preservation layer (15) is larger than the outer diameter of the heating cavity (1), a turbulent flow closing-in is arranged at the bottom of the first heat preservation layer (15), a frame groove (603) is arranged at the inner wall of the shell (6), and a mounting frame (1501) matched with the frame groove (603) is arranged at the top of the outer wall of the first heat preservation layer (15).
  10. 10. The tempering heat preservation furnace according to claim 8, wherein the furnace body assembly further comprises a second heat preservation layer (16), the second heat preservation layer (16) is arranged in the shell (6) and is close to the bottom wall of the shell (6), fireproof cotton is filled between the second heat preservation layer (16) and the bottom wall of the shell (6), and avoidance holes for the passing of the coupling (14) are formed in the second heat preservation layer (16) and the fireproof cotton.

Description

Tempering heat preservation furnace for watch parts Technical Field The application relates to the field of tempering and heat preservation of parts, in particular to a tempering and heat preservation furnace for watch parts. Background Tempering heat preservation is a key procedure for processing precise parts of the watch, and is positioned at a core position in a chain of the whole watch manufacturing industry, and the fine quality difference of the tempering heat preservation can be amplified in the subsequent watch assembling, debugging and long-term use processes, so that the accuracy and durability of the watch in time running are affected. In recent years, as the requirements of consumers on the quality and the functions of watches are continuously improved, the watch market is also faced with unprecedented development opportunities, which makes the importance of tempering heat preservation technology in the field of watch manufacturing increasingly remarkable. It not only relates to the quality of a single watch part, but also affects the level of development and market competitiveness of the whole watch industry. In tempering and heat-preserving treatment of watch parts in the related art, common tempering furnace equipment is generally adopted for eliminating internal stress after quenching, stabilizing metal structures and sizes and improving toughness of parts. These devices typically heat through simple resistance wires, lack accurate temperature control means, and can only be roughly judged and adjusted by the experience of the operator. In terms of sealing, the sealing is carried out only by a common cover and a gasket, and a stable vacuum environment is difficult to form. For the placement of parts, scientific and reasonable layout planning is not available, and the parts are stacked together at will. In addition, in the process of forming vacuum, complex equipment and complicated operation procedures are often required, and the production cost and the operation difficulty are increased. However, these conventional techniques have significant drawbacks. Because the temperature control precision is low, the temperature in the furnace is easy to be uneven, so that the parts are heated unevenly in the tempering process, and the problems of size deformation and uneven hardness are further solved. The sealing is poor, so that the stable anaerobic environment required by tempering cannot be effectively maintained, parts are easy to oxidize, a large amount of heat is lost, and the energy utilization rate is low. The unreasonable layout of the parts also aggravates the phenomenon of uneven temperature and affects the tempering quality of the parts. In addition, the complex anaerobic environment forming process increases equipment cost and operation complexity, reduces production efficiency, and cannot meet the increasing demands of watch precision machining. Disclosure of Invention In order to overcome the technical problems, the application provides a tempering heat preservation furnace for watch parts. The tempering heat preservation furnace for watch parts provided by the application adopts the following technical scheme: the tempering heat preservation furnace for the watch parts comprises a furnace core assembly, wherein the furnace core assembly comprises a heated cavity, a cavity cover and a carrier tower, the heated cavity is of a vertical cylindrical structure, the cavity cover is matched with an opening at the top of the heated cavity, the carrier tower comprises a plurality of part boxes which are arranged in a stacked mode along the vertical direction, and the carrier tower is arranged in the heated cavity; The furnace body assembly comprises a shell, a heat-insulating interlayer and a heating furnace liner, wherein the shell is of a vertical cylindrical structure, the wall of the shell is provided with an inner cavity, the heat-insulating interlayer is arranged in the inner cavity of the wall of the shell, the heating cavity is at least partially contained in the shell, the heating furnace liner is arranged in the shell and is coaxially arranged with the shell, and the heating furnace liner is electrically connected with an external power supply; The oxygen isolation assembly comprises an air supply pipe and an exhaust pipe, the exhaust pipe is arranged at the top of the cavity cover, one end of the exhaust pipe penetrates through the cavity cover and is communicated with the heated cavity, the other end of the exhaust pipe is provided with an exhaust one-way valve, one end of the air supply pipe is communicated with a fuel storage tank, the other end of the air supply pipe penetrates through the bottom of the heated cavity and is communicated with the heated cavity, the air supply pipe is at least partially accommodated in the shell, and ethanol or methanol is stored in the fuel storage tank; The temperature control assembly comprises a thermocouple, a temperature controller and a sol