A lattice-type water-cooled arc additive platform with real-time temperature-stress-deformation control

Abstract

The present invention proposes a dot matrix water-cooled arc additive platform for real-time temperature-stress-deformation control. The platform body includes a detachable additive substrate, a dot matrix water-cooled pad, and a highly anti-deformation flexible workbench. It is provided with a corresponding water-cooled circulating pump, a flow valve, and a cooling water pipe, as well as a spring patch temperature sensor, a contact distance sensor, a strain gauge, a data acquisition box, and a computer that cooperate with the water cooling system. The computer monitors the temperature, stress, and deformation state of each working area of ​​the detachable additive substrate through sensors and data acquisition boxes, and independently controls the water-cooled circulating pump and flow valve corresponding to each area to adjust the water flow of the corresponding cooling water pipe, and takes away the heat in each area of ​​the detachable additive substrate through the water flow in the corresponding cooling water channel, so as to realize the real-time dot matrix water cooling operation of the detachable additive substrate, reduce deformation through heat dissipation cooling, and realize anti-deformation with the mechanical restraint of the highly anti-deformation flexible platform.

Description

Technical Field

[0001] The present invention belongs to the field of arc additive special platforms, and specifically relates to a lattice-type water-cooled arc additive platform capable of accurately regulating temperature, stress, and deformation in real time. Background Art

[0002] Arc-fused wire additive manufacturing is a type of metal additive manufacturing technology. Its principle is to use an electric arc as a heat source to melt the wire and then weld it layer by layer on the substrate according to a set path. It has the following advantages: (1) high forming efficiency; (2) high material utilization rate; (3) relatively few restrictions on part size; (4) the formed part is composed of all weld metal, with excellent mechanical properties and high density. This technology will become the main development direction leading the equipment manufacturing industry in the future. However, additive manufacturing is formed by layer-by-layer accumulation using the method of high-temperature liquid metal droplet transition. When adding larger components, as the number of weld layers increases during the forming process, the heat accumulation of the formed part is serious and the heat dissipation conditions become worse, making it more difficult to control the edge morphology and forming. Therefore, there are common problems in the deformation control and organization regulation of welded parts. Especially in the deformation control of large additive components, the existing rigid fixation or traditional water cooling is difficult to control the strain of welded parts and may even cause damage to the workbench.

[0003] Existing welding technology cannot fully meet the needs of arc additive. Chinese patent application CN201721679806.3 discloses a water cooling device for welding, and Chinese patent application CN201921874762.9 discloses a welding auxiliary device with cooling function. The above two platforms are only for the purpose of cooling component temperature, and only provide two component cooling methods. The heat accumulation of arc additive is more complicated, which is related to related materials, additive structure, and additive path. It has higher requirements for temperature, stress, and deformation. Therefore, designing a special arc additive platform that can accurately control temperature, stress, and deformation in real time is a problem that needs to be solved by technicians in this field. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] The present invention proposes a lattice-type water-cooled arc additive platform that can accurately control temperature, stress, and deformation in real time, so as to solve the technical problem of how to control temperature and stress through water cooling to control component deformation.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, the present invention proposes a lattice water-cooled arc additive platform for real-time and precise control of temperature-stress-deformation, the lattice water-cooled arc additive platform comprises a platform body, a water cooling system and a sensor system; wherein,

[0008] The main body of the platform is a three-layer structure, including a detachable additive substrate, a dot matrix water-cooling pad and a highly anti-deformation flexible workbench; the water cooling system includes a water-cooling circulation pump, a flow valve and a cooling water pipe; the sensing system includes a spring patch temperature sensor, a contact distance sensor, a strain gauge, a data acquisition box and a computer;

[0009] The upper surface of the dot matrix water cooling pad is provided with a plurality of spring patch temperature sensors and contact distance measuring sensors corresponding to each working area of ​​the detachable additive substrate, and is protected by a cover plate; the spring patch temperature sensors and contact distance measuring sensors are connected to a data acquisition box, and the data acquisition box is connected to a computer;

[0010] The high-deformation-resistant flexible workbench is fixed on the bearing chassis, the lattice water-cooling pad is arranged on the top of the high-deformation-resistant flexible workbench, and the detachable additive substrate is located above the lattice water-cooling pad; the detachable additive substrate is connected to the bottom bolt through-hole of the high-deformation-resistant flexible workbench through the substrate fixing bolts, the lattice water-cooling pad is provided with through-holes only for the substrate fixing bolts to pass through, and the lattice water-cooling pad does not play a rigid fixing role on the detachable additive substrate;

[0011] A plurality of strain gauges corresponding to the working areas of the detachable additive substrate are fixed on the lower surface of the highly anti-deformation flexible workbench, the strain gauges are connected to a data acquisition box, and the data acquisition box is connected to a computer;

[0012] A plurality of cooling water channels corresponding to the working areas of the detachable additive substrate are arranged inside the lattice water-cooling pad, and a plurality of reserved water inlets and outlets are arranged in the high-deformation-resistant flexible workbench, and the position of each reserved water inlet and outlet corresponds to the interface position of each cooling water channel; each cooling water channel is connected to a cooling water pipe, one end of each cooling water pipe is connected to a water-cooling circulation pump, and the other end passes through the high-deformation-resistant flexible workbench through the reserved water inlet and outlet, and is connected to the cooling water channel inside the lattice water-cooling pad; each cooling water pipe is provided with a flow valve, the flow valve is connected to a computer, and the water-cooling circulation pump is connected to the computer through a water-cooling circulation pump lead;

[0013] The computer obtains the real-time deformation and temperature curve of each working area of ​​the detachable additive substrate during the working process according to the data acquisition box and the temperature sensors, distance measuring sensors and strain gauges independently arranged in each working area, monitors the temperature, stress and deformation state of each working area of ​​the detachable additive substrate, and adjusts the water flow of each cooling water pipe respectively by controlling the water cooling circulation pump and flow valve switch corresponding to each working area, thereby realizing the real-time dot matrix water cooling operation of the detachable additive substrate.

[0014] Furthermore, the working area of ​​the detachable additive substrate is divided into m×n sub-areas with side lengths of 100 to 300 mm.

[0015] Furthermore, the spring patch temperature sensor is used to monitor the temperature of the detachable additive substrate, and can expand and contract through the spring after the detachable additive substrate is deformed, so that the sensor continues to maintain a close fit with the lower surface of the detachable additive substrate, thereby accurately collecting the temperature and deformation data of the detachable additive substrate.

[0016] Furthermore, the cover plate is provided with lead grooves for the temperature sensor and the distance measuring sensor.

[0017] Furthermore, the distribution mode of the cooling water channels is determined according to the plate thickness of the lattice water-cooling pad. When the plate thickness is greater than or equal to 200 mm, the cooling water channels are vertically distributed. When the plate thickness is less than 200 mm, the cooling water channels are horizontally distributed.

[0018] Furthermore, the working area of ​​the highly anti-deformation flexible workbench is divided into a plurality of sub-areas, and a strain gauge and a reserved water inlet and outlet are arranged on the lower surface of each sub-area.

[0019] Furthermore, the bearing chassis is made of a highly anti-deformation steel material, and the lattice-type water-cooling pad is made of a copper or aluminum material.

[0020] Furthermore, the lattice water-cooling pad and the highly anti-deformation flexible workbench are connected and fixed by using a mortise and tenon or latch structure.

[0021] Furthermore, an auxiliary strain gauge is provided on the side of the connection structure between the dot matrix water-cooling pad and the high-resistance deformation flexible workbench, and the vertical stress and strain of the high-resistance deformation flexible workbench are monitored in real time with the assistance of a data acquisition box.

[0022] Furthermore, the cover plate is packaged by friction stir welding.

[0023] (III) Beneficial effects

[0024] The present invention proposes a lattice water-cooled arc additive platform for real-time temperature-stress-deformation regulation, comprising a detachable additive substrate, a lattice water-cooled pad, a highly anti-deformation flexible workbench, a cover plate, a spring patch temperature sensor, a contact distance sensor, a strain gauge, a data acquisition box, a water-cooled circulating pump, a flow valve, a cooling water pipe, a bearing chassis and a computer.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. It adopts a unique three-layer structure: a detachable additive substrate-a lattice water-cooling pad-a highly anti-deformation flexible workbench; and each layer of the laminated structure is replaceable. The detachable additive substrate selects a suitable substrate according to its material, plate thickness, opening position, etc.; the lattice water-cooling pad is divided into several working areas, and each area is equipped with cooling water channels with different distribution methods according to the thickness of the water-cooling pad. The computer combines the monitoring data of each area and controls it in real time, using running water to take away the heat of the additive process to achieve cooling; the highly anti-deformation flexible workbench and the bearing chassis form a supporting platform, which is provided with bolt through holes to rigidly fix the additive substrate. The deformation of the water-cooling pad is precisely controlled by the lattice method and the mechanical constraints of the highly anti-deformation flexible platform to achieve anti-deformation of the additive substrate.

[0027] 2. The working area is divided into m×n sub-areas with a side length of 100 to 300 mm. Each sub-area is equipped with a cooling water channel. Circulating water cooling is achieved through the reserved cooling holes opened on the workbench and the cooling water channels in the dot matrix water cooling pad. The strain gauges at the bottom of the workbench and the spring temperature sensors and contact distance sensors on the upper surface of the dot matrix water cooling pad can collect the real-time deformation and temperature curves of each point in the working process and transmit them to the computer. In conjunction with the monitoring and simulation control system, the temperature, stress and deformation state of each sub-area can be independently regulated by adjusting the water flow rate, completing real-time and precise control of the partitions, and realizing dot matrix water cooling precise control of temperature, stress and deformation.

[0028] 3. After the substrate is deformed, the spring patch temperature sensor can continue to fit closely due to the expansion and contraction of the spring, accurately collecting data and reducing errors.

[0029] 4. The cover of the dot matrix water cooling pad is packaged by stir friction welding, which has higher sealing and durability.

[0030] 5. It can realize local temperature and stress control, and can adjust the water flow in real time through the computer to realize adaptive temperature control and deformation control, so as to cooperate with the data acquisition box to regulate the temperature and control the deformation; according to the tissue needs and the characteristics of the thermal cycle curve, it can assist in realizing tissue regulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the lattice water-cooled arc additive platform of the present invention;

[0032] Figure 2 This is a schematic diagram of sensor wiring in the present invention;

[0033] Figure 3 This is a schematic diagram of the sensor installation in the present invention;

[0034] Figure 4 It is a schematic diagram of the cooling water channel arrangement in the present invention;

[0035] Figure 5 Schematic diagram of the cooling water channel structure in the present invention: (a) meandering horizontal water channel, (b) spiral horizontal water channel, (c) vertical water channel;

[0036] Figure 6 Schematic diagram of the working area division of the high anti-deformation flexible workbench in the present invention: (a) overall area, (b) local area;

[0037] Figure 7 Schematic diagram of the connection structure between the dot matrix water cooling pad and the highly anti-deformation flexible workbench in the present invention: (a) mortise and tenon connection, (b) latch structure connection.

[0038] In the figure: 1. Highly resistant to deformation flexible workbench; 2. Dot matrix water cooling pad; 3. Removable additive substrate; 4. Spring patch temperature sensor; 5. Contact distance sensor; 6. Strain gauge; 7. Data acquisition box; 8. Water cooling circulation pump; 9. Water cooling circulation pump lead wire; 10. Strain gauge lead wire; 11. Temperature sensor and distance sensor lead wire; 12. Flow valve; 13. Cooling water pipe; 14. Load-bearing chassis; 15. Computer; 16. Reserved water inlet and outlet at the bottom; 17. Bottom bolt perforation; 18. Temperature sensor and distance sensor lead wire groove. DETAILED DESCRIPTION

[0039] In order to make the purpose, content and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples.

[0040] This embodiment proposes a lattice-type water-cooled arc additive platform for real-time temperature-stress-deformation control, and its structure is as follows: Figure 1 As shown, it mainly includes a highly resistant deformation flexible workbench 1, a dot matrix water-cooling pad 2, a detachable additive substrate 3, a spring patch temperature sensor 4, a contact distance sensor 5, a strain gauge 6, a data acquisition box 7, a strain gauge lead 10, a temperature sensor and a distance sensor lead 11, a water-cooling circulation pump 8, a water-cooling circulation pump lead 9, a flow valve 12, a cooling water pipe 13, a load-bearing chassis 14 and a computer 15.

[0041] The main body of this platform is a three-layer structure, including: a detachable additive substrate 3, a lattice water-cooling pad 2, and a highly anti-deformation flexible workbench 1; and is equipped with a corresponding water cooling system, including: a water-cooling circulation pump 8, a water-cooling circulation pump lead 9, a flow valve 12 and a cooling water pipe 13; and a sensing system that cooperates with the water cooling system, including: a spring patch temperature sensor 4, a contact distance sensor 5, a strain gauge 6, a data acquisition box 7, a strain gauge lead 10, a temperature sensor and a distance sensor lead 11 and a computer 15.

[0042] The upper surface of the dot matrix water cooling pad 2 is provided with a plurality of spring patch temperature sensors 4 and contact distance measuring sensors 5 corresponding to the working areas of the detachable additive substrate 3, and is protected by a cover plate packaged by stir friction welding. The cover plate is provided with lead grooves 18 for the temperature sensor and the distance measuring sensor, such as Figure 2 As shown, the temperature sensor and distance sensor lead wire 11 is wired along the temperature sensor and distance sensor lead wire groove 18 and connected to the data acquisition box 7 , and the data acquisition box 7 is connected to the external computer 15 .

[0043] The highly anti-deformation flexible workbench 1 is welded on the bearing chassis 14 to form a supporting platform, the lattice water-cooling pad 2 is arranged on the top of the highly anti-deformation flexible workbench 1, and the detachable additive substrate 3 is located above the lattice water-cooling pad 2. The detachable additive substrate 3 is connected to the bottom bolt through-hole 17 of the highly anti-deformation flexible workbench 1 through the substrate fixing bolts, and the lattice water-cooling pad 2 is provided with through-holes only for the substrate fixing bolts to pass through, and the lattice water-cooling pad 2 does not play a rigid fixing role on the detachable additive substrate 3.

[0044] like Figure 3 As shown, the spring patch temperature sensor 4 can monitor the temperature of the detachable additive substrate 3, and can expand and contract the spring after the detachable additive substrate 3 is deformed, so that the sensor and the lower surface of the detachable additive substrate 3 continue to be closely fitted, accurately collecting the temperature and deformation data of the detachable additive substrate 3 and reducing errors. The data measured by the contact distance sensor 5 can be combined with other sensor data for simulation to monitor the working state of the detachable additive substrate 3.

[0045] A plurality of strain gauges 6 corresponding to the working areas of the detachable additive substrate 3 are fixed to the lower surface of the highly deformation-resistant flexible workbench 1 . The strain gauges 6 are connected to a data acquisition box 7 via strain gauge leads 10 , and the data acquisition box 7 is connected to an external computer 15 .

[0046] The lattice water cooling pad 2 is provided with a plurality of cooling water channels corresponding to each working area of ​​the detachable additive substrate 3, and the highly anti-deformation flexible workbench 1 is provided with a plurality of reserved water inlets and outlets 16. The position of each reserved water inlet and outlet 16 corresponds to the interface position of each cooling water channel, such as Figure 4 shown.

[0047] The cooling water channel distribution mode is determined according to the plate thickness of the dot matrix water cooling pad 2. If the plate thickness is greater than or equal to 200 mm, the cooling water channel inside the dot matrix water cooling pad 2 is vertically distributed. If the plate thickness is less than 200 mm, the cooling water channel inside the dot matrix water cooling pad 2 is horizontally distributed. Figure 5 shown.

[0048] Each cooling water channel is connected to a cooling water pipe 13. One end of each cooling water pipe 13 is connected to the water cooling circulation pump 8, and the other end passes through the high anti-deformation flexible workbench 1 through the reserved water inlet and outlet 16, and is connected to the cooling water channel inside the lattice water cooling pad 2. Each cooling water pipe 13 is provided with a flow valve 12, and the flow valve 12 is connected to the computer 15. The water cooling circulation pump 8 is connected to the computer 15 through the water cooling circulation pump lead 9.

[0049] In this example, according to each working area of ​​the detachable additive substrate 3, the working area of ​​the highly anti-deformation flexible workbench 1 is divided into m×n sub-areas with a side length of 100 to 300 mm, and a strain gauge 6 and a reserved water inlet and outlet 16 are provided on the lower surface of each sub-area of ​​the highly anti-deformation flexible workbench 1. Figure 6 As shown in (a) and (b).

[0050] In this embodiment, the support frame 14 is made of high-deformation-resistant steel material, and the lattice water-cooling pad 2 is made of copper or aluminum material. The lattice water-cooling pad 2 and the high-deformation-resistant flexible workbench 1 are connected and fixed by a mortise and tenon or latch structure, such as Figure 7 As shown in (a) and (b), an auxiliary strain gauge is provided on the side of the connecting structure, and the vertical stress and strain of the high deformation resistance flexible workbench 1 are monitored in real time through the data acquisition box 7.

[0051] When the lattice water-cooled arc additive platform of the present invention is working, the computer 15 obtains the real-time deformation and temperature curve of each working area of ​​the detachable additive substrate 3 during the working process based on the data collected by the data acquisition box 7, monitors the temperature, stress, deformation and other states of the detachable additive substrate 3, and adjusts the water flow of each cooling water pipe 13 by controlling the switch of the water-cooling circulation pump 8 and the flow valve 12 corresponding to each working area. The heat of the detachable additive substrate 3 is taken away by the water flow in the cooling water channel, thereby realizing the real-time lattice water cooling operation of the detachable additive substrate 3, completing the heat dissipation and cooling operation in the additive process, reducing deformation through heat dissipation and cooling, and realizing anti-deformation with the mechanical constraint of the high deformation resistance flexible platform.

[0052] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A lattice water-cooled arc additive platform for real-time temperature-stress-deformation control, characterized in that: The lattice water-cooled arc additive platform includes a platform body, a water-cooling system and a sensor system; wherein, The platform body is a three-layer structure, including a detachable additive substrate, a lattice water-cooling pad and a highly anti-deformation flexible workbench; the water cooling system includes a water-cooling circulation pump, a flow valve and a cooling water pipe; the sensing system includes a spring patch temperature sensor, a contact distance sensor, a strain gauge, a data acquisition box and a computer; The upper surface of the dot matrix water cooling pad is provided with a plurality of spring patch temperature sensors and contact distance measuring sensors corresponding to each working area of ​​the detachable additive substrate, and is protected by a cover plate; the spring patch temperature sensor and the contact distance measuring sensor are connected to a data acquisition box, and the data acquisition box is connected to a computer; the spring patch temperature sensor is used to monitor the temperature of the detachable additive substrate, and can be extended and retracted by the spring after the detachable additive substrate is deformed, so that the sensor and the lower surface of the detachable additive substrate continue to be closely fitted, and the temperature and deformation data of the detachable additive substrate are accurately collected; The highly anti-deformation flexible workbench is fixed on the bearing chassis, the lattice water-cooling pad is arranged on the top of the highly anti-deformation flexible workbench, and the detachable additive substrate is located above the lattice water-cooling pad; the detachable additive substrate is connected to the bottom bolt through-hole of the highly anti-deformation flexible workbench through the substrate fixing bolts, the lattice water-cooling pad is provided with through-holes only for the substrate fixing bolts to pass through, and the lattice water-cooling pad does not play a rigid fixing role on the detachable additive substrate; the working area of ​​the highly anti-deformation flexible workbench is divided into a plurality of sub-areas, and a strain gauge and a reserved water inlet and outlet are arranged on the lower surface of each sub-area; A plurality of strain gauges corresponding to the working areas of the detachable additive substrate are fixed on the lower surface of the highly anti-deformation flexible workbench, and the strain gauges are connected to a data acquisition box, and the data acquisition box is connected to a computer; A plurality of cooling water channels corresponding to the working areas of the detachable additive substrate are arranged inside the lattice water-cooling pad, and a plurality of reserved water inlets and outlets are arranged in the highly anti-deformation flexible workbench, and the position of each reserved water inlet and outlet corresponds to the interface position of each cooling water channel; each cooling water channel is connected to a cooling water pipe, one end of each cooling water pipe is connected to a water-cooling circulation pump, and the other end passes through the highly anti-deformation flexible workbench through the reserved water inlet and outlet, and is connected to the cooling water channel inside the lattice water-cooling pad; each cooling water pipe is provided with a flow control valve, the flow control valve is connected to a computer, and the water-cooling circulation pump is connected to the computer through a water-cooling circulation pump lead; The computer obtains the real-time deformation and temperature curve of each working area of ​​the detachable additive substrate during the working process according to the data acquisition box and the temperature sensors, distance measuring sensors and strain gauges independently arranged in each working area, monitors the temperature, stress and deformation state of each working area of ​​the detachable additive substrate in real time, and adjusts the water flow of each cooling water pipe respectively by controlling the water cooling circulation pump and flow control valve switch corresponding to each working area, so as to realize the real-time dot matrix water cooling operation of the detachable additive substrate.

2. The lattice water-cooled arc additive platform according to claim 1, characterized in that: The working area of ​​the detachable additive substrate is divided into m×n sub-areas with side lengths of 100 to 300 mm.

3. The lattice water-cooled arc additive platform according to claim 1, characterized in that: The cover plate is provided with a temperature sensor and a distance sensor lead groove.

4. The lattice water-cooled arc additive platform according to claim 1, characterized in that: The cooling water channel distribution mode is determined according to the plate thickness of the dot matrix water cooling pad. When the plate thickness is greater than or equal to 200 mm, the cooling water channel is vertically distributed. When the plate thickness is less than 200 mm, the cooling water channel is horizontally distributed.

5. The lattice water-cooled arc additive platform according to claim 1, characterized in that: The bearing chassis is made of high-deformation-resistant steel material, and the lattice-type water-cooling pad is made of copper or aluminum material.

6. The lattice water-cooled arc additive platform according to claim 1, characterized in that: The lattice water-cooling pad and the highly anti-deformation flexible workbench are connected and fixed by using a mortise and tenon or latch structure.

7. The lattice water-cooled arc additive platform according to claim 1, characterized in that: An auxiliary strain gauge is provided on the side of the connection structure between the dot matrix water-cooling pad and the high-resistance deformation flexible workbench, and a data acquisition box is used to assist in real-time monitoring of the vertical stress and strain of the high-resistance deformation flexible workbench.

8. The lattice water-cooled arc additive platform according to claim 1, characterized in that: The cover plate is packaged by friction stir welding.

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