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CN-122007950-A - Milling device and method for metal plate manufacturing equipment

CN122007950ACN 122007950 ACN122007950 ACN 122007950ACN-122007950-A

Abstract

The invention discloses a milling device and a milling method for metal plate manufacturing equipment, wherein the milling device comprises a milling machine, a low-temperature phase-change positioning mechanism is arranged on the milling machine and comprises a positioning table, a plurality of uniformly distributed diversion trenches are formed in the top surface of the positioning table, a heatable supporting bar is fixedly arranged between every two diversion trenches, two airflow sealing guide assemblies with adjustable intervals are arranged on the positioning table, and two rubber strips are arranged on opposite side walls of the two airflow sealing guide assemblies. According to the invention, by means of a low-temperature phase-change clamping technology, the workpiece is fixed by utilizing the zero stress adsorption of the ice layer and is in a low-temperature brittleness state, so that the internal stress is synchronously released along with the cutting of the material in the milling process, and the rebound deformation after the machining is completed is radically eliminated.

Inventors

  • CHEN ZIXUAN

Assignees

  • 东莞市华轩智能科技有限公司

Dates

Publication Date
20260512
Application Date
20260409

Claims (8)

  1. 1. The milling device for the metal plate manufacturing equipment comprises a milling machine (100), and is characterized in that a low-temperature phase-change positioning mechanism (200) is arranged on the milling machine (100), the low-temperature phase-change positioning mechanism (200) comprises a positioning table (1), a plurality of evenly distributed guide grooves (2) are formed in the top surface of the positioning table (1), a heatable support bar (3) is fixedly arranged between every two guide grooves (2), two airflow sealing guide assemblies (4) with adjustable intervals are arranged on the positioning table (1), and two rubber strips (5) are arranged on opposite side walls of the two airflow sealing guide assemblies (4) and used for being attached to the side walls of the metal plate to avoid gas overflow in the airflow sealing guide assemblies (4); One of the air flow sealing guide assemblies (4) is communicated with the cold nitrogen supply unit and is used for introducing cold nitrogen into the plurality of guide grooves (2), and the other air flow sealing guide assembly (4) is communicated with the nitrogen recovery unit and is used for sucking and recovering nitrogen flowing through the guide grooves (2) under negative pressure.
  2. 2. The milling device for the metal plate manufacturing equipment is characterized in that a plurality of counter bores (11) are formed in the side wall of the positioning table (1), the counter bores (11) are located below the guide grooves (2), the counter bores (11) and the guide grooves (2) are arranged in an orthogonal mode, a plurality of guide holes are vertically formed in the bottom of the guide grooves (2), piston grooves (12) which are communicated with each other are formed between the guide holes and the counter bores (11), lifting rods (13) are sleeved on the inner walls of the guide holes in a sliding mode, pistons (14) which are sleeved on the inner walls of the piston grooves (12) in a sliding mode are fixedly connected to the bottoms of the lifting rods (13), the top faces of the pistons (14) are in blocking connection with the piston grooves (12) and the end faces of the connecting portions, hydraulic oil is filled in the piston grooves (12) located below the pistons (14) in the counter bores (11), control valves (15) are connected to the ports of the guide grooves (2), the control valves (15) are communicated with the pumping hydraulic oil, the pumping pump and the hydraulic oil, cooling air can flow through the lifting rods, and the lifting rods (13) can be cooled down, and the lifting rods (13) can be driven by the lifting and cooling air.
  3. 3. The milling device for the sheet metal piece manufacturing equipment according to claim 1, wherein the heatable supporting bar (3) is made of a heat conducting metal material, and an electric heating rod (31) is embedded in the heatable supporting bar (3).
  4. 4. The milling device for the sheet metal piece manufacturing equipment is characterized in that the airflow sealing guide assembly (4) comprises a rectangular shell (41) with an opening at the bottom, the bottom end face of the rectangular shell (41) is in sliding sealing connection with the top faces of all the heatable support bars (3), guide adjusting assemblies (42) are arranged at two ends of the rectangular shell (41), a plurality of adjusting valve assemblies (43) are arranged on the side walls of the rectangular shell, the adjusting valve assemblies are used for opening and closing a passage of a guide groove (2) below the rectangular shell (41), and an interface (44) communicated with the inside of the rectangular shell is arranged at the top of the rectangular shell (41).
  5. 5. A milling device for metal plate manufacturing equipment is characterized in that the guide adjusting component (42) comprises two rectangular blocks (421) fixedly installed at two ends of a rectangular shell (41), a transverse rod (422) is connected to one side wall of one rectangular block (421) in a sliding penetrating mode, two first installing blocks (423) are fixedly connected to two ends of the transverse rod (422), the two first installing blocks (423) are fixedly installed on the side wall of a positioning table (1), a screw rod (424) is connected to the side wall of the other rectangular block (421) in a penetrating mode in a threaded mode, a second installing block (425) fixedly installed on the side wall of the positioning table (1) is connected to one end of the screw rod (424) in a penetrating mode in a rotating mode, and a first motor (426) fixedly installed on the side wall of the positioning table (1) is connected to the other end of the screw rod in a penetrating mode, and the first motor (426) drives the two guide adjusting components (42) to move oppositely and away from each other through the screw rod (424).
  6. 6. A metal sheet manufacturing equipment milling device is characterized in that the regulating valve assembly (43) comprises a second motor (431) fixedly installed on the side wall of a rectangular shell (41), the output end of the second motor (431) is connected with a threaded rod (432) in a shaft mode, one end, far away from the second motor (431), of the threaded rod (432) is fixedly connected with a baffle (433), the outer wall of the threaded rod (432) is connected with a connecting plate (434) in a threaded mode, the side wall, close to the bottom, of the connecting plate (434) is fixedly provided with a sliding block (435), the outer wall of the bottom of the sliding block (435) is in sliding sealing connection with the inner wall of a guide groove (2), the side wall of the sliding block (435) is in sliding sealing connection with the side wall of a heatable supporting bar (3), the top surface of the sliding block (435) is in sliding sealing connection with the end face of the bottom of the rectangular shell (41), and when the top surface of the sliding block (435) is attached to the end faces of two sides of an opening of the rectangular shell (41), gas in the rectangular shell (41) flows out of the guide groove (2) from the rectangular shell (435) to be positioned in different metal sheet widths.
  7. 7. The milling device of the sheet metal piece manufacturing equipment of claim 4, wherein the side wall of the rubber strip (5) is fixedly connected with the side wall of the rectangular shell (41), and the bottom surface of the rubber strip (5) is in sliding sealing connection with the top surface of the heatable supporting strip (3).
  8. 8. A method of using a milling device of a sheet metal piece manufacturing apparatus, using a sheet metal piece manufacturing apparatus as claimed in any one of claims 1 to 6, comprising the steps of: s1, placing a metal plate on a positioning table (1), moving two airflow sealing guide assemblies (4) in opposite directions, and tightly attaching two rubber strips (5) to the side wall of the metal plate; S2, starting a cold nitrogen supply unit to introduce cold nitrogen into each diversion trench through one airflow sealing and guiding assembly (4), and starting a nitrogen recovery unit to suck and recover the cold nitrogen flowing through the diversion trench through the other airflow sealing and guiding assembly (4) under negative pressure to form a closed loop circulation loop; when the temperature of the top surface of the positioning table (1) is lower than the ambient dew point temperature, condensing water vapor between the top surface of the positioning table and the bottom surface of the metal plate to form an ice layer, and fixing the metal plate on the top surface of the positioning table; S3, starting a milling machine (100) to mill the metal plate; and S4, after milling, closing the cold nitrogen supply unit, stopping introducing cold nitrogen, and electrifying and heating the heatable support bar (3) to enable the temperature of the top surface of the positioning table to rise to be higher than the freezing point, melting the ice layer, and releasing the metal plate.

Description

Milling device and method for metal plate manufacturing equipment Technical Field The invention relates to the technical field of machining, in particular to a milling device and a milling method for metal plate manufacturing equipment. Background When the metal plate, especially the thin-wall plate, is milled, the traditional clamping mode generally adopts mechanical pressing plates, flat tongs and the like to fix the workpiece. The common defects of the modes are that the clamping force can lead the plate to generate elastic deformation and stress concentration, the clamping force is removed after the processing is finished, the residual stress in the workpiece is released, the rebound deformation is caused, and the processing precision is seriously affected. Research shows that under the point support clamping mode, the thin plate piece is subjected to the combined action of cutting force, cutting heat and clamping force, the workpiece is deformed due to the release of residual stress after machining, and the machining deformation is difficult to control due to the coupling relation of complex factors. Therefore, how to realize reliable fixing of the plate under the condition of zero clamping stress, and to improve cutting processing and promote internal stress release by synchronously utilizing low-temperature conditions is a technical problem to be solved in the art, so we propose a milling device and a milling method for metal plate manufacturing equipment. Disclosure of Invention The invention aims to solve the problems that the clamping force of the existing mechanical clamping causes elastic deformation of a plate and residual stress is released after machining to cause rebound deformation, and provides a milling device and a milling method for metal plate manufacturing equipment. In order to achieve the aim, the milling device of the metal plate manufacturing equipment adopts the following technical scheme that the milling device comprises a milling machine, wherein a low-temperature phase-change positioning mechanism is arranged on the milling machine and comprises a positioning table, a plurality of uniformly distributed diversion trenches are formed in the top surface of the positioning table, a heatable supporting bar is fixedly arranged between every two diversion trenches, two airflow sealing guide assemblies with adjustable spacing are arranged on the positioning table, two rubber strips are arranged on opposite side walls of the two airflow sealing guide assemblies and are used for being attached to the side walls of the metal plate, and gas in the airflow sealing guide assemblies is prevented from overflowing; One of the air flow sealing guide assemblies is communicated with the cold nitrogen supply unit and is used for introducing cold nitrogen into the plurality of guide grooves, and the other air flow sealing guide assembly is communicated with the nitrogen recovery unit and is used for sucking and recovering nitrogen flowing through the guide grooves under negative pressure. Preferably, the side wall of the positioning table is provided with a plurality of counter bores, the counter bores are positioned below the plurality of guide grooves, the counter bores and the guide grooves are arranged in an orthogonal mode, the bottom of each guide groove is vertically provided with a plurality of guide holes, piston grooves which are communicated with each other are formed between the guide holes and the counter bores, the inner wall of each guide hole is slidably sleeved with a lifting rod, the bottom of each lifting rod is fixedly connected with a piston which is slidably sleeved on the inner wall of each piston groove, the top surface of each piston is matched with the piston groove in a blocking mode, the end face of each connecting part is in blocking mode, hydraulic oil is filled in each piston groove positioned below each piston, a control valve is connected to a port of each guide groove, the control valve is communicated with a hydraulic oil pumping and injecting pump, the piston and the lifting rods are driven to lift through pumping and injecting hydraulic oil, and after the lifting rods are vertically lifted, turbulent flow can be carried out on flowing gas, and the cooling effect of cold nitrogen is enhanced. Preferably, the heatable support bar is made of heat-conducting metal, and an electric heating rod is embedded in the heatable support bar. Preferably, the airflow sealing guide assembly comprises a rectangular shell with an opening at the bottom, the bottom end face of the rectangular shell is in sliding sealing connection with the top faces of all the heatable support bars, guide adjusting assemblies are installed at two ends of the rectangular shell, a plurality of adjusting valve assemblies are installed on the side walls of the rectangular shell and used for opening and closing a channel of a diversion trench below the rectangular shell, and an interface communicated wi