Multi-degree of freedom multi-pass off-axis wire feed clamp gas shroud module for electric arc additive manufacturing

Abstract

The present application relates to the technical field of electric arc additive equipment, and particularly relates to a multi-freedom multi-path side-shaft wire feeding clamp gas cover module for electric arc additive manufacturing, which comprises a fixing module for mounting and fixing a welding torch, and an arc-shaped adjusting through slot is formed in the fixing module; a clamping module is used for clamping a wire feeding nozzle and adjusting a wire feeding pose, and the clamping module is installed at the arc-shaped adjusting through slot of the fixing module; a gas cover module is used for inputting protective gas, and the gas cover module is connected with the fixing module. The present application adopts a detachable modular design, four modes of coordinated wire feeding of four wires, three wires, double wires and single wire are realized by increasing or decreasing the clamping module, the multi-freedom multi-wire interlaced angle adjustable and multi-directional additive manufacturing are satisfied, the present application is suitable for various electric arc additive manufacturing platforms, the wire feeding pose can be conveniently and flexibly adjusted, the side-shaft wire feeding clamp gas cover is beneficial to efficient protection of the cladding process, and the welding efficiency and the welding quality are improved, and the present application solves the problems that the prior art cannot realize flexible adjustment of multi-wire, multi-direction and interlaced angle and the cladding process has poor protection.

Description

Technical Field

[0001] This invention relates to the field of multi-wire arc additive manufacturing equipment technology, and in particular to a multi-degree-of-freedom, multi-path off-axis wire feeding fixture air cover module for arc additive manufacturing. Background Technology

[0002] Additive manufacturing (AM), commonly known as 3D printing, integrates computer-aided design, material processing and forming technologies. Based on digital model files, it uses software and CNC systems to deposit specialized metallic, non-metallic, and medical / biomaterials layer by layer through methods such as extrusion, sintering, melting, photopolymerization, and spraying to create physical objects. Arc additive manufacturing uses an electric arc to melt and drip metal wire, depositing it layer by layer to form a workpiece. Argon arc additive manufacturing is a metal additive manufacturing method that uses argon as a protective gas, a boom as an electrode, an electric arc as a heat source, and metal wire as filler. Due to its advantages such as the ability to form large structural parts, low manufacturing cost, and high material utilization, it is gradually becoming one of the most promising metal additive manufacturing technologies.

[0003] With the continuous development of arc additive manufacturing technology, single-wire arc additive manufacturing technology can no longer meet the application needs of modern industry for metal composite materials and functionally graded materials. Multi-wire composite arc additive manufacturing technology has gradually become the mainstream research direction. Wire feeding angle, the angle between multiple wires, the distance between the wire and the cladding layer, and the shielding gas are all important process parameters affecting the cladding quality. In order to meet the requirements of arc additive manufacturing for multi-wire processes, new wire feeding fixtures are constantly emerging. For example, the patent (Lei Weining, Xue Bing, Chen Shixin, et al. A wire feeding nozzle fixture based on an argon arc welding carriage and its cladding process [P]. Application No.: 201910618933.X) designed a double-wire wire feeding fixture. This fixture can feed two kinds of metal wires at the same time. Its structural design makes it easy to adjust the wire feeding angle and the wire feeding position. However, this fixture fixes the angle between the two wires to 180°, which cannot meet the current requirements for flexible and adjustable angles and multiple degrees of freedom between multiple wires.

[0004] In existing technologies, wire feeding fixtures are mainly concentrated on single-wire and double-wire types, making it impossible to add or remove wire feeding fixtures in real time. Furthermore, the angle between double wires is inconvenient to adjust or is fixed and cannot be adjusted, which cannot meet the requirements of multi-wire arc additive manufacturing processes for multiple wire feedings, multiple degrees of freedom, and flexible and adjustable wire feeding positions. In addition, the protective gas cover is usually fixedly set behind the additive forming process. Since there is always a gap between the welding torch and the rear protective gas cover, there is a problem in actual production where the molten pool directly below the arc has poor protection. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a multi-degree-of-freedom, multi-path off-axis wire feeding fixture gas cover module for arc additive manufacturing, which solves the problems of existing technologies such as the inability to add or remove wire feeding fixtures in real time, inconvenience in adjusting the angle between multiple wires or fixed and unadjustable angles, and inability to meet the requirements of high molten pool protection and multi-degree-of-freedom, multi-directional additive manufacturing, and flexible and adjustable wire feeding posture in multi-wire arc additive manufacturing.

[0006] The present invention solves the above-mentioned technical problems through the following technical means:

[0007] A multi-degree-of-freedom, multi-path bypass wire feeding fixture gas shroud module for arc additive manufacturing includes:

[0008] A fixing module is used to install and fix the welding gun, and the fixing module is provided with an arc-shaped adjustment groove.

[0009] A clamping module is used to clamp the wire feeding nozzle and adjust the wire feeding position. The clamping module is installed in the arc-shaped adjustment slot of the fixed module and can slide along the circumference of the fixed module.

[0010] The gas hood module is used to input protective gas, and the gas hood module is connected to the fixing module.

[0011] Furthermore, the clamping module includes a connecting plate, an adjusting plate, and a thread nozzle fixing assembly. The connecting plate and the adjusting plate are slidably connected, and the adjusting plate and the thread nozzle fixing assembly are slidably connected.

[0012] Furthermore, the connecting plate is provided with a transverse adjustment groove, the adjustment plate is provided with a longitudinal adjustment groove, one end of the adjustment plate passes through the transverse adjustment groove, and a first limiting bolt passes through the longitudinal adjustment groove. The first limiting bolt also passes through the transverse adjustment groove.

[0013] Furthermore, the other end of the adjusting plate is provided with an arc-shaped adjusting hole, the threaded nozzle fixing assembly is provided with a first threaded hole and a first mounting hole for clamping the threaded nozzle, a second limiting bolt is threadedly connected in the first threaded hole, a sliding block is fixed on the threaded nozzle fixing assembly, one end of the sliding block passes through the arc-shaped adjusting hole and is limited and fixed by the second limiting bolt.

[0014] Furthermore, one end of the connecting plate is provided with a second threaded hole, and a third limiting bolt is threaded into the second threaded hole. One end of the connecting plate passes through the arc-shaped adjusting groove and is limited and fixed by the third limiting bolt.

[0015] Furthermore, a second mounting hole for holding the welding gun is provided in the middle of the fixing module, and a third threaded hole is also provided on the fixing module, in which a fourth limiting bolt is threadedly connected.

[0016] Furthermore, the arc-shaped adjustment channel includes a first arc-shaped adjustment channel and a second arc-shaped adjustment channel arranged symmetrically on an axis.

[0017] Furthermore, the air hood module includes a housing, a perforated plate, and an air inlet. The air inlet is installed on the housing and communicates with the inside of the housing. One end of the housing is connected to the fixing module, and the other end is connected to the perforated plate.

[0018] Furthermore, a first mounting plate is fixed on the fixing module, and a second mounting plate is fixed on the housing. The first mounting plate and the second mounting plate are connected. A fourth threaded hole is formed on the first mounting plate, and a fifth threaded hole is formed on the second mounting plate at the position corresponding to the fourth threaded hole.

[0019] This invention discloses a multi-degree-of-freedom, multi-path off-axis wire feeding fixture gas hood module for arc additive manufacturing. It adopts a detachable modular design, with the clamping module installed in an arc-shaped adjustment slot. This allows for real-time addition and removal of the clamping module to adjust wire feeding, and also enables adjustment of the angle between two or more wires by moving the clamping module within the arc-shaped adjustment slot. The operation is simple and convenient, meeting the requirements of multi-wire arc additive manufacturing processes for multiple degrees of freedom and flexible adjustment of wire feeding posture. This multi-degree-of-freedom, multi-path off-axis wire feeding fixture gas hood module for arc additive manufacturing can achieve coordinated wire feeding in four modes: four-wire, three-wire, two-wire, and single-wire, by adding or removing clamping modules. It satisfies the requirements of adjustable angles between multiple wires and multi-directional additive manufacturing, and can accurately and reliably feed wire. The invention provides convenient and flexible adjustment of the wire feeding posture, solving the problem that existing technologies cannot flexibly adjust multiple wires, multiple directions, and the angle between wires. The co-moving gas cover module in the multi-degree-of-freedom multi-path off-axis wire feeding fixture gas cover module for arc additive manufacturing facilitates efficient protection of the cladding process, improving welding efficiency and quality. This invention's multi-degree-of-freedom multi-path off-axis wire feeding fixture gas cover module for arc additive manufacturing allows the welding torch and wire nozzle to maintain a forward wire feeding state throughout the additive manufacturing process by pre-setting the angle between multiple wires, thus achieving multi-directional additive manufacturing. It solves the problem of the welding torch not being able to rotate on a three-axis platform and avoids the problem of vibration caused by the robot rotating the welding torch, which affects accuracy. It is applicable to various arc additive manufacturing platforms. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the multi-degree-of-freedom multi-path off-axis wire feeding fixture air cover module for arc additive manufacturing of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the multi-degree-of-freedom multi-path off-axis wire feeding fixture air cover module for arc additive manufacturing of the present invention.

[0022] Figure 3This is a schematic diagram of the structure of Embodiment 3 of the multi-degree-of-freedom multi-path off-axis wire feeding fixture air cover module for arc additive manufacturing of the present invention;

[0023] Figure 4 This is an enlarged structural schematic diagram of the fixing module in the gas cover module of the multi-degree-of-freedom multi-path off-axis wire feeding fixture for arc additive manufacturing of the present invention;

[0024] Figure 5 This is a schematic diagram of the clamping module in the gas cover module of the multi-degree-of-freedom multi-path off-axis wire feeding fixture for arc additive manufacturing of the present invention;

[0025] Figure 6 This is an enlarged structural schematic diagram of the nozzle fixing component in the air cover module of the multi-degree-of-freedom multi-path off-axis wire feeding fixture for arc additive manufacturing of the present invention.

[0026] Figure 7 This is an enlarged structural schematic diagram of the air cover module in the multi-degree-of-freedom multi-path off-axis wire feeding fixture air cover module for electric arc additive manufacturing of the present invention;

[0027] The components include: a fixing module 1, a connecting plate 2, an adjusting plate 3, a threaded nozzle fixing assembly 4, a housing 5, a perforated plate 6, an air inlet 7, a threaded nozzle 8, a welding torch 9, a second mounting hole 10, a first arc-shaped adjusting groove 11, a fourth threaded hole 12, a first mounting plate 13, a third threaded hole 14, a second arc-shaped adjusting groove 15, a second threaded hole 16, a transverse adjusting groove 17, a longitudinal adjusting groove 18, a first mounting hole 19, a sliding block 20, an arc-shaped adjusting hole 21, a second mounting plate 22, a fifth threaded hole 23, a clamping module 24, an air cover module 25, and a first threaded hole 26. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Unless otherwise specified in the following examples, the conditions are as per standard conditions or the manufacturer's recommendations. Raw materials, equipment, or instruments whose manufacturers are not specified are all commercially available products.

[0030] Example 1

[0031] Please refer to Figure 1 This embodiment of a multi-degree-of-freedom, multi-path off-axis wire feeding fixture gas cover module for arc additive manufacturing includes a fixing module 1 and a clamping module 24. Please refer to... Figure 4The fixing module 1 is used to install and fix the welding torch 9. The fixing module 1 has an arc-shaped adjustment slot, preferably two arc-shaped adjustment slots, namely a first arc-shaped adjustment slot 11 and a second arc-shaped adjustment slot 15 arranged symmetrically on an axis. Both the first arc-shaped adjustment slot 11 and the second arc-shaped adjustment slot 15 are used to connect the clamping module 24 and adjust the angle between the multi-wires. To install and fix the welding torch 9, a second mounting hole 10 for clamping the welding torch 9 is provided in the middle of the fixing module 1. A third threaded hole 14 is also provided on the side of the fixing module 1, and a fourth limiting bolt is threaded into the third threaded hole 14 for fixing the welding torch 9.

[0032] Please refer to Figure 5 The clamping module 24 is used to clamp the wire feeding nozzle 8 and adjust the wire feeding position. In this embodiment, there are 4 clamping modules 24. All 4 clamping modules 24 are installed at the arc-shaped adjustment slot of the fixed module 1 and can slide around the fixed module 1.

[0033] The clamping module 24 includes a connecting plate 2, an adjusting plate 3, and a nozzle fixing assembly 4. The connecting plate 2 and the adjusting plate 3 are slidably connected, and the adjusting plate 3 and the nozzle fixing assembly 4 are also slidably connected. Specifically, the connecting plate 2 has a transverse adjusting groove 17, and the adjusting plate 3 has a longitudinal adjusting groove 18. One end of the adjusting plate 3 slides through the transverse adjusting groove 17, and a first limiting bolt passes through the longitudinal adjusting groove 18. The first limiting bolt also passes through the transverse adjusting groove 17. One end of the adjusting plate 3 slides in the transverse adjusting groove 17 and is limited by the first limiting bolt to adjust the position of the nozzle relative to the welding torch 9. One end of the connecting plate 2 has a second threaded hole 16, and a third limiting bolt is threaded into the second threaded hole 16. One end of the connecting plate 2 passes through the arc-shaped adjusting groove and is limited and fixed by the third limiting bolt.

[0034] Please refer to Figure 6 The other end of the adjusting plate 3 is provided with an arc-shaped adjusting hole 21. The threaded nozzle fixing assembly 4 is provided with a first threaded hole 26 and a first mounting hole 19 for clamping the threaded nozzle 8. A second limiting bolt is threaded into the first threaded hole 26. A sliding block 20 is fixed on the threaded nozzle fixing assembly 4. One end of the sliding block 20 passes through the arc-shaped adjusting hole 21 and is limited and fixed by the second limiting bolt. The angle of the clamped threaded nozzle 8 relative to the welding gun 9 is adjusted by sliding the sliding block 20 in the arc-shaped adjusting hole 21.

[0035] Please refer to Figure 7The automatic wire feeding fixture in this embodiment also includes a gas shield module 25 for inputting protective gas. The gas shield module 25 is connected to the fixing module 1, and the gas shield module 25 and the fixing module 1 are coaxially arranged. The coaxially moving gas shield is beneficial for efficiently protecting the cladding process, and is beneficial for improving welding efficiency and welding quality. The gas shield module 25 includes a housing 5, a perforated plate 6, and a gas inlet 7. The gas inlet 7 is installed on the housing 5 and communicates with the inside of the housing 5. One end of the housing 5 is connected to the fixing module 1, and the other end is connected to the perforated plate 6.

[0036] A first mounting plate 13 is fixed on the fixed module 1, and a second mounting plate 22 is fixed on the housing 5. The first mounting plate 13 and the second mounting plate 22 are connected. A fourth threaded hole 12 is provided on the first mounting plate 13, and a fifth threaded hole 23 is provided on the second mounting plate 22 at the position corresponding to the fourth threaded hole 12. Screws or bolts are threaded into the fourth threaded hole 12 and the fifth threaded hole 23 to connect the fixed module 1 and the air cover module 25 together.

[0037] When two pairs of clamping modules 24 are installed in the first arc-shaped adjustment channel 11 and the second arc-shaped adjustment channel 15 respectively, the angle between two adjacent wires can be adjusted from 10° to 180°. When three clamping modules 24 are installed in the first arc-shaped adjustment channel 11 (or the second arc-shaped adjustment channel 15) and one clamping module 24 is installed in the second arc-shaped adjustment channel 15 (or the first arc-shaped adjustment channel 11), the angle between two adjacent wires can be adjusted from 10° to 180°. When all four clamping modules 24 are installed in the first arc-shaped adjustment channel 11 (or the second arc-shaped adjustment channel 15), the angle between two adjacent wires can be adjusted from 10° to 120°.

[0038] According to the formula for calculating spatial degrees of freedom: F=6n-5P5-4P4-3P3-2P2-P1, where F represents the degrees of freedom of the mechanism, n represents the number of moving components, P5 represents only 1 degree of freedom with 5 constraints; P4 represents only 2 degrees of freedom with 4 constraints; P3 represents 3 constraints; P2 represents 2 constraints; and P1 represents 1 constraint. In the multi-degree-of-freedom multi-path off-axis wire feeding clamp air cover module for arc additive manufacturing in this embodiment, each clamping module of the multi-degree-of-freedom multi-path off-axis wire feeding clamp air cover module has 2 P5 pairs and 1 P3 pair. Therefore, the spatial degrees of freedom are calculated as follows: F=6*(1+3*4)-5*(2*4)-3*(1*4)=26, which can realize 26 spatial degrees of freedom.

[0039] Example 2

[0040] Please refer to Figure 2The main difference between this embodiment of a multi-degree-of-freedom multi-path off-axis wire feeding clamp air cover module for arc additive manufacturing and the above-mentioned Example 1 is that only three clamping modules 24 for adjusting the wire feeding posture and clamping the wire are used.

[0041] In this embodiment, when two clamping groups are simultaneously installed in the first arc-shaped adjustment channel 11 (or the second arc-shaped adjustment channel) and one clamping module 24 is installed in the second arc-shaped adjustment channel 15 (or the first arc-shaped adjustment channel 11), the angle between two adjacent wires can be adjusted from 10° to 180°. When all three clamping groups are simultaneously installed in the first arc-shaped adjustment channel 11 (or the second arc-shaped adjustment channel), the angle between two adjacent wires can be adjusted from 10° to 130°.

[0042] In the multi-degree-of-freedom multi-path off-axis wire feeding clamp air cover module for arc additive manufacturing in this embodiment, each clamping module of the multi-degree-of-freedom multi-path off-axis wire feeding clamp air cover module has 2 P5 pairs and 1 P3 pair. Therefore, the spatial degrees of freedom are calculated as follows: F3=6*(1+3*3)-5*(2*3)-3*(1*3)=21, which can realize 21 spatial degrees of freedom.

[0043] Example 3

[0044] Please refer to Figure 3 The main difference between this embodiment of a multi-degree-of-freedom multi-path off-axis wire feeding clamp air cover module for arc additive manufacturing and the above-mentioned Example 1 and Example 2 is that it only uses two clamping modules 24 for adjusting the wire feeding posture and clamping the wire feeding nozzle 8.

[0045] In this embodiment, when one clamping module 24 is installed in the first arc-shaped adjustment channel 11 (or the second arc-shaped adjustment channel 15) and the other clamping module 24 is installed in the second arc-shaped adjustment channel (or the first arc-shaped adjustment channel), the angle between two adjacent wires can be adjusted from 10° to 180°. When both clamping modules 24 are installed in the first arc-shaped adjustment channel 11 (or the second arc-shaped adjustment channel 15) at the same time, the angle between two adjacent wires can be adjusted from 10° to 140°.

[0046] In this embodiment of the multi-degree-of-freedom multi-path off-axis wire feeding clamp gas hood module for arc additive manufacturing, each clamping module of the multi-degree-of-freedom multi-path off-axis wire feeding clamp gas hood module has 2 P5 pairs and 1 P3 pair. Therefore, the spatial degrees of freedom are calculated as follows: F2 = 6*(1+3*2)-5*(2*2)-3*(1*2)=16, which can realize 16 spatial degrees of freedom. The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention. The technologies, shapes, and structural parts not described in detail in the present invention are all known technologies.

Claims

1. A multi-degree-of-freedom, multi-path bypass wire feeding fixture air cover module for arc additive manufacturing, characterized in that, include: A fixing module is used to install and fix the welding gun, and the fixing module is provided with an arc-shaped adjustment groove. A clamping module is used to clamp the wire feeding nozzle and adjust its position. The clamping module is installed in the arc-shaped adjustment slot of a fixed module and can slide circumferentially along the fixed module. The clamping module includes a connecting plate, an adjusting plate, and a wire feeding nozzle fixing assembly. The connecting plate and the adjusting plate are slidably connected, and the adjusting plate and the wire feeding nozzle fixing assembly are also slidably connected. The connecting plate has a transverse adjustment slot, and the adjusting plate has a longitudinal adjustment slot. One end of the adjusting plate passes through the transverse adjustment slot, and a first limiting bolt passes through the longitudinal adjustment slot, also passing through the transverse adjustment slot. The other end of the adjusting plate has an arc-shaped adjustment hole. The wire feeding nozzle fixing assembly has a first threaded hole and a first mounting hole for clamping the wire feeding nozzle. A second limiting bolt is threaded into the first threaded hole. A sliding block is fixed to the wire feeding nozzle fixing assembly, and one end of the sliding block passes through the arc-shaped adjustment hole and is limited and fixed by the second limiting bolt. A gas shield module is used to input protective gas. The gas shield module is connected to a fixing module. The gas shield module includes a housing, a perforated plate, and a gas inlet. The gas inlet is installed on the housing and communicates with the inside of the housing. One end of the housing is connected to the fixing module, and the other end is connected to the perforated plate. A first mounting plate is fixed on the fixing module, and a second mounting plate is fixed on the housing. The first mounting plate and the second mounting plate are connected. A fourth threaded hole is opened on the first mounting plate, and a fifth threaded hole is opened on the second mounting plate corresponding to the position of the fourth threaded hole.

2. The multi-degree-of-freedom, multi-path off-axis wire feeding fixture gas cover module for arc additive manufacturing according to claim 1, characterized in that, One end of the connecting plate is provided with a second threaded hole, and a third limiting bolt is threaded into the second threaded hole. One end of the connecting plate passes through the arc-shaped adjusting groove and is limited and fixed by the third limiting bolt.

3. The multi-degree-of-freedom, multi-path off-axis wire feeding fixture air cover module for arc additive manufacturing according to claim 1, characterized in that, The fixing module has a second mounting hole for holding the welding gun in the middle position, and a third threaded hole is also provided on the fixing module, in which a fourth limiting bolt is threadedly connected.

4. The multi-degree-of-freedom, multi-path off-axis wire feeding fixture air cover module for arc additive manufacturing according to claim 1, characterized in that, The arc-shaped adjustment channel includes a first arc-shaped adjustment channel and a second arc-shaped adjustment channel arranged symmetrically on an axis.

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