CN111702083A

CN111702083A - Intelligent temperature control system of hot stamping die

Info

Publication number: CN111702083A
Application number: CN201911140046.2A
Authority: CN
Inventors: 单忠德; 姜波; 孙福臻; 李永杰; 张泉达
Original assignee: Beijing Jike Guochuang Lightweight Science Research Institute Co Ltd
Current assignee: Beijing Jike Guochuang Lightweight Science Research Institute Co Ltd
Priority date: 2020-04-03
Filing date: 2020-04-03
Publication date: 2020-09-25
Anticipated expiration: 2040-04-03
Also published as: CN111702083B

Abstract

The invention provides an intelligent temperature control system for a hot stamping die, which comprises a temperature control system and a waterway system. The temperature control system is characterized in that a central controller collects information such as a pressure sensor, a temperature sensor, a flowmeter and the like, and controls a variable-frequency circulating pump and a flow control valve to change flow according to process requirements so as to realize temperature control; the waterway system comprises a heat-preservation water storage device, a cooling device, an air pressure tank, a water pipe accessory and the like. The invention has the advantages that the flow of the frozen water is controlled to be adjusted according to the process requirements according to the requirements of different stages of stamping, pressure maintaining, return stroke and the like on the temperature of the die in the hot stamping process; the invention realizes the temperature control of the upper die and the lower die in a partition way, and ensures the effectiveness of the cooling temperature of the upper die surface and the lower die surface of the stamping part; the water accumulator is arranged in a partitioning manner between the warm water area and the frozen water area, a communicating pipe is arranged between the two water areas, a filter screen is arranged in the communicating pipe to realize particle filtration, and the water accumulator plays a role in buffering the condition of sudden increase of inlet flow; the invention has the frequency conversion energy-saving effect.

Description

Intelligent temperature control system of hot stamping die

Technical Field

The invention mainly relates to the field of hot stamping and forming of plates, in particular to an intelligent temperature control system of a hot stamping die.

Background

The cooling effect of the die in the hot stamping process has a significant influence on the production quality and the production efficiency of the stamped parts. The cooling device of the die in the existing hot stamping technological process has single function, the cooling speed of the die cannot be regulated and controlled, and different requirements of different stages such as stamping, pressure maintaining, return stroke and the like on the temperature of the die in the novel hot stamping technological process cannot be met; in addition, the circulating pump adopts a power frequency circulating pump at present, and the circulating pump always runs at a fixed frequency in the whole production process, so that energy waste is caused, and the energy-saving effect cannot be achieved.

Disclosure of Invention

The invention provides an intelligent temperature control system for a hot stamping die, which solves the problem of different requirements on die temperature in different stages of stamping, pressure maintaining, return stroke and the like in the hot stamping process in the background technology, and increases the temperature control function of upper and lower die partitions.

The technical scheme of the invention is realized as follows: an intelligent temperature control system for a hot stamping die comprises a temperature control system and a waterway system. The temperature control system is characterized in that a central controller collects information of a pressure sensor, an inlet temperature sensor, a mold temperature sensor, an outlet temperature sensor and a flowmeter and sends control signals to a variable frequency circulating pump and a flow control valve for temperature control according to process requirements; the waterway system comprises a heat-preservation water accumulator, a cooling device, a variable-frequency circulating pump, a heat-preservation air pressure tank, a hot stamping die, a water pipe accessory and the like. The internal structure of the heat-preservation water accumulator is arranged by adopting a partition of a warm water area and a frozen water area; and a heat preservation layer partition plate is arranged between the warm water area and the frozen water area, the heat preservation layer partition plate is provided with a communicating pipe, the communicating pipe is communicated with the warm water area and the frozen water area, and a filter screen is arranged in the communicating pipe.

The invention has the beneficial effects that: according to different requirements of different stages such as stamping, pressure maintaining, return stroke and the like on the temperature of the die in the hot stamping process, the flow velocity and flow of the chilled water are controlled to adjust the temperature of the die according to the process requirements, so that the pressure maintaining time is effectively shortened, and the production efficiency is improved; meanwhile, the invention realizes the temperature control function of the upper die and the lower die in a partition way, and ensures the effectiveness of the cooling temperature of the upper die surface and the lower die surface of the stamping part, thereby ensuring the uniform and stable distribution of the internal tissues of the stamping part; the internal structure of the heat-preservation water accumulator adopts the partition arrangement of the warm water area and the frozen water area, so that the cooling efficiency of warm water can be improved, and the service life of the circulating pump is prolonged. The hot water area can realize the function of particle precipitation, the communicating pipe can realize the function of particle filtration, and the communicating pipe can play a role of buffering the condition of sudden increase of the inlet flow; meanwhile, the invention has the frequency conversion and energy saving effects.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Description of the components: 1. the device comprises a central controller 2, a heat preservation water storage device and refrigerating system 3, a variable frequency circulating pump 4, a heat preservation air pressure tank 5, a pressure sensor 6, an inlet temperature sensor 7, a flow control valve 8, a flowmeter 9, a mold temperature sensor 10, a hot stamping mold 11, an outlet temperature sensor 201, a warm water area 202, a chilled water area 203, a heat preservation partition plate 204, a communicating pipe 205, a cooling device 206 and a filter screen.

Detailed Description

For a better understanding and appreciation of the invention, it will be further described in connection with the accompanying drawings: an intelligent temperature control system for a hot stamping die comprises a temperature control system and a waterway system. The temperature control system is characterized in that a central controller (1) collects information of a pressure sensor (5), an inlet temperature sensor (6), a mold temperature sensor (9), an outlet temperature sensor (11) and a flowmeter (8) and sends control signals to a variable-frequency circulating pump (3) and a flow control valve (7) according to process requirements to control the temperature; the waterway system comprises a heat-preservation water accumulator, a cooling device (2), a variable-frequency circulating pump (3), a heat-preservation air pressure tank (4), a hot stamping die (10), a water pipe accessory and the like.

Water of the water path system is stored and cooled in the heat preservation water storage device and the cooling device (2), low-temperature water is firstly conveyed to the heat preservation air pressure tank (4) by the variable frequency circulating pump (3) to be subjected to water pressure regulation, then water flow control is carried out through the flow control valves (7) of the upper die and the lower die respectively, the water flow enters the hot stamping die (10) to absorb die heat to form high-temperature water, and finally the water flows back to the heat preservation water storage device and the cooling device (2) to be circulated. The internal water storage structure of the heat preservation water storage device and the cooling device (2) is arranged by adopting the subareas of the warm water area (201) and the frozen water area (202); an insulating layer (203) is arranged between the warm water area and the chilled water area, the insulating layer (203) is provided with a communicating pipe (204), the communicating pipe is communicated with the warm water area (201) and the chilled water area (202), and a filter screen (206) is arranged in the communicating pipe; the cooling device (205) sucks the water in the warm water area (201), cools the water, and then flows to the frozen water area (202) for storage.

According to the requirements of a hot stamping process, when the temperature of a hot stamping die needs to be reduced rapidly, a central controller sends an instruction to increase the opening of a flow control valve, reduce the pressure of a chilled water outlet, increase the frequency of a variable frequency circulating pump, ensure constant pressure, increase the flow and perform efficient cooling; when slow cooling is needed, the central controller sends an instruction to reduce the opening of the flow control valve, the outlet pressure of the chilled water is increased, the frequency of the variable-frequency circulating pump is reduced, the flow is reduced, and slow cooling is carried out; when heat preservation is needed, the central controller sends an instruction to close the flow control valve, and the frequency of the variable-frequency circulating pump is to be the lowest or the pump is stopped to preserve heat. The heat preservation air pressure tank absorbs the energy impact generated by the change of the flow control valve and the variable frequency circulating pump, thereby achieving the effect of stabilizing the pressure.

Therefore, according to different requirements of different stages such as stamping, pressure maintaining, return stroke and the like on the temperature of the die in the hot stamping process, the flow rate and the flow rate of the chilled water are controlled in real time, so that the temperature of the die is adjusted according to the process requirements, the pressure maintaining time is effectively shortened, and the production efficiency is improved; meanwhile, the upper die and the lower die have a temperature control function in a partition mode, and the effectiveness of cooling temperature of the upper die surface and the lower die surface of the stamping part is guaranteed, so that the internal tissues of the stamping part are uniformly and stably distributed; meanwhile, the variable-frequency circulating pump collects the temperature change of the die through the controller, the flow of cooling water flowing in and out of the die is adjusted through the flow meter, the inlet pressure change caused by the change of the flow of the cooling water can be fed back to the controller, and the controller adjusts the output frequency of the variable-frequency circulating pump to enable the inlet pressure to return to the normal level, so that the purpose of saving energy is achieved.

Claims

1. An intelligent temperature control system for a hot stamping die comprises a temperature control system and a waterway system. The temperature control system is characterized by comprising a central controller (1), a pressure sensor (5), an inlet temperature sensor (6), a mold temperature sensor (9), an outlet temperature sensor (11), a flowmeter (8) and a flow control valve (7); the water path system comprises a heat-preservation water accumulator, a cooling device (2), a variable-frequency circulating pump (3), a heat-preservation air pressure tank (4), a hot stamping die (10), a water pipe accessory and the like, and is characterized in that a central controller (1) collects information of a pressure sensor (5), an inlet temperature sensor (6), a die temperature sensor (9), an outlet temperature sensor (11) and a flowmeter (7) and sends control signals to the variable-frequency circulating pump (3) and an upper die and lower die flow control valve (7) according to process requirements to adjust the flow of freezing water in a partition manner, so that the temperatures of the upper die and the lower die are effectively controlled in a partition manner; the low-temperature chilled water is conveyed to the heat-preservation air pressure tank (4) by the variable-frequency circulating pump to be subjected to water pressure regulation, so that the water pressure is ensured to be constant.

2. The intelligent temperature control system for the hot stamping die as claimed in claim 1, wherein the die temperature sensor (9) is disposed in the hot stamping die body, and can effectively detect the temperature of the feedback die in real time.

3. The intelligent temperature control system for the hot stamping die according to claim 1, wherein the variable frequency circulating pump (3) adopts a variable frequency control mode, the controller collects the temperature change of the die, the flow meter adjusts the flow rate of cooling water entering and exiting the die, the change of inlet pressure caused by the change of the flow rate of cooling water is fed back to the controller, and the controller adjusts the output frequency of the variable frequency circulating pump to return the inlet pressure to a normal level, thereby achieving the purpose of saving energy.

4. The intelligent temperature control system for the hot stamping die according to claim 1, wherein a heat-preservation air pressure tank (4) is arranged between the variable frequency circulating pump (3) and the hot stamping die (10), and the heat-preservation air pressure tank (4) can effectively absorb and release energy to ensure the stability of chilled water flow.

5. The intelligent temperature control system for the hot stamping die according to claim 1, wherein in the provided heat-preservation water reservoir and cooling device (2), the internal structure of the heat-preservation water reservoir is arranged by partitioning a warm water area (201) and a chilled water area (202); an insulating layer partition plate (203) is arranged between the warm water area and the chilled water area, a communicating pipe (204) is arranged on the insulating layer partition plate (203), the communicating pipe is communicated with the warm water area (201) and the chilled water area (202), and a filter screen (206) is arranged in the communicating pipe; the cooling device (205) sucks the water in the warm water area (201), cools the water, and then flows to the frozen water area (202) for storage.