CN219966722U - Multi-wire arc additive manufacturing device - Google Patents

Abstract

The utility model discloses a multi-wire arc additive manufacturing device, which relates to the field of arc additive manufacturing and comprises an insulating cover, wherein a multi-wire mounting head is sleeved outside the insulating cover along the axial direction, a cooling device is sleeved inside the insulating cover, an arc generating mechanism is arranged at the axial center of the cooling device, and a tungsten needle of the arc generating mechanism extends to the outside of the multi-wire mounting head; the wire feeding holes with the number not less than 3 are uniformly distributed on the multi-wire mounting head in a surrounding manner through the insulating cover, the extension lines of the tungsten needles are intersected with the extension lines of the wire feeding holes at one point, and in the additive manufacturing process, a plurality of welding wires extend to an electric arc from different directions at the same angle, so that the problem of deposition melt channel anisotropy caused by the wire feeding direction during single-side wire feeding is effectively improved and even avoided, the coaxial wire feeding effect and additive manufacturing chemical structure regulation and control are realized, and in addition, the cooling device is internally provided with a cooling channel, so that the heat dissipation capacity of the device is effectively improved, and the service life of the device is ensured.

Description

Multi-wire arc additive manufacturing device

Technical Field

The utility model relates to the field of arc additive manufacturing, in particular to a multi-wire arc additive manufacturing device.

Background

Metal additive manufacturing technology has become one of the important developments in future manufacturing industries; metal fuse additive manufacturing is divided into three forms by energy source: laser fuse additive manufacturing, electron beam fuse additive manufacturing, and arc fuse additive manufacturing. The arc fuse additive manufacturing technology is increasingly applied to the fields of automobiles, ships, aerospace, and the like due to the characteristics of high material utilization rate, high deposition rate, short production period, low equipment cost and suitability for manufacturing metal parts with medium and low complexity; however, in the traditional arc additive manufacturing, only single wires of the same material are allowed to be fed for welding, and although many devices can realize welding of two welding wires at present, the welding wires are not fed into a molten pool at the same time, the welding wires need to be replaced continuously, and the additive efficiency is low.

Based on the above-mentioned problems, patent CN111347132a discloses a multi-wire TIG arc additive manufacturing device, which uses a fixing piece to fix a height adjusting piece on a TIG welding gun, and sets a plurality of wire feeding nozzles on the height adjusting piece, and the wire feeding nozzles synchronously feed wires during welding, so as to effectively improve additive manufacturing efficiency, however, in the prior art, the wire feeding nozzles are arranged in parallel on one side of an arc, in the additive manufacturing process, the welding gun and the additive direction need to be ensured to be consistent all the time, otherwise, the anisotropy of a melting channel seriously affects additive quality; patent CN112475539a discloses a multi-wire metal arc fuse additive manufacturing device, the device main body of which comprises a main container, a plurality of welding guns and a plurality of wire feeding pipes, wherein the welding guns are detachably arranged on the side wall of the main container, one wire feeding pipe is correspondingly arranged below each welding gun, and in the additive manufacturing process, the welding guns simultaneously perform fuse operation, and molten metal flows out under the flow guiding effect of the main container, however, in the prior art, as the welding guns are arranged in the main container, heat cannot be directly acted on a substrate or a previous cladding layer, so that the bonding performance of different cladding layers is affected, and the additive quality cannot be ensured; based on this, how to provide a multi-wire arc additive manufacturing device capable of improving or even avoiding the anisotropy of a melting channel on the premise of ensuring the quality of the additive is a technical problem to be solved by the person skilled in the art.

Disclosure of Invention

The utility model aims to solve the technical problems and provide a multi-wire arc additive manufacturing device, which can improve and even avoid the anisotropy of a melting channel on the premise of ensuring the additive quality by improving a multi-wire feeding head.

In order to achieve the above object, the present utility model provides the following solutions: the utility model provides a multi-wire electric arc additive manufacturing device which comprises a multi-wire mounting head, an insulating cover, a cooling device and an electric arc generating mechanism, wherein the multi-wire mounting head is sleeved outside the insulating cover along the axial direction; the multi-wire mounting head is uniformly provided with a plurality of wire feeding holes around the insulating cover, the number of the wire feeding holes is not less than 3, and the extension lines of the tungsten needles are intersected with the extension lines of the wire feeding holes at one point.

Preferably, the multi-wire mounting head is detachably connected with the insulating cover through a thread structure.

Preferably, a threaded water nozzle is arranged at the liquid inlet of the cooling device.

Preferably, the cooling channel is of a U-shaped structure and is arranged on one side of the mounting hole, and the liquid inlet channel and the liquid outlet channel of the cooling channel are parallel to the axis of the cooling device.

Preferably, the electric arc generating mechanism further comprises an air pipe joint, a quick joint, a jacking screw cap, a conducting nozzle and a tungsten electrode clamp for fixing the tungsten needle, which are coaxially connected in sequence, and the conducting nozzle is in threaded connection with the mounting hole.

Preferably, the wire feeding hole is detachably connected with a quick connector and a wire feeding nozzle, welding wires of different specifications are directly inserted into the wire feeding nozzle through the quick connector, and the inner diameter of the wire outlet end of the wire feeding nozzle is matched with the diameter of the welding wires.

Preferably, the mounting flange comprises a connecting rib, one end of the connecting rib is provided with a fixing hole and a locking assembly, the fixing hole is sleeved on the outer side of the insulating cover, and the locking assembly is used for locking the insulating cover.

Preferably, the mounting flange further comprises a support plate, one end, far away from the fixing hole, of the connecting rib is provided with a plurality of screw holes, and the connecting rib is connected with the support plate through screws.

Preferably, the mounting flange further comprises a support plate, and the connecting ribs and the support plate are of an integrated structure.

Preferably, the welding robot arm positioning device is characterized in that a plurality of positioning holes and positioning unthreaded holes are formed in the supporting plate, the supporting plate is fixedly connected with the welding robot arm through the positioning holes, and the positioning unthreaded holes correspond to unthreaded holes in the welding robot arm one by one.

Compared with the prior art, the utility model has the following technical effects:

1. the multi-wire arc additive manufacturing device comprises a multi-wire mounting head, a fixed seat and an arc generating mechanism, wherein the fixed seat is sleeved in the multi-wire mounting head, the arc generating mechanism is arranged at the axis position of the fixed seat, a tungsten needle of the arc generating mechanism extends to the outside of the multi-wire mounting head, a plurality of (not less than 3) wire feeding holes for welding wires to pass through are uniformly distributed on the multi-wire mounting head around the fixed seat, the extension lines of the tungsten needle and the extension lines of the wire feeding holes are intersected at one point, during welding, an arc is generated between the tungsten needle and a base material, the base material and a plurality of welding wires are melted, heat generated by the arc directly acts on the welding wires and the base material, the bonding quality of the base material and a cladding layer is effectively ensured, in addition, the plurality of welding wires extend to the arc from different directions, the problem of deposition melting channel anisotropy caused by wire feeding directions during single-side wire feeding is effectively improved, and the coaxial wire feeding effect and additive manufacturing chemical structure controllability can be realized.

2. The fixing seat comprises the insulating cover and the cooling device, wherein the insulating cover is arranged between the cooling device and the multi-wire mounting head, and the electric arc generating mechanism and the cooling device are insulated with the multi-wire mounting head together, so that the welding wire and the tungsten electrode are not in the same potential, and the tungsten electrode is electrified to heat and melt the welding wire, so that the welding wire is prevented from being directly inserted into a molten pool to form a short circuit; furthermore, it should be noted that: according to the utility model, the cooling channel for cooling medium circulation is arranged in the cooling device, so that the overall heat dissipation capacity of the device is effectively improved, the heat dissipation problem caused by arrangement of the multi-wire mounting head around the arc generating mechanism can be further solved, and the service life of the device is effectively ensured.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of a multi-wire arc additive manufacturing apparatus;

FIG. 2 is a front view of a multi-wire arc additive manufacturing apparatus;

FIG. 3 is a cross-sectional view of the multi-wire arc additive manufacturing apparatus B-B of FIG. 2;

FIG. 4 is a schematic view of a cooling device;

FIG. 5 is a top view of the cooling device;

fig. 6 (a) is a schematic structural view of an arc generating mechanism, and fig. 6 (b) is a sectional view of the arc generating mechanism in the direction C-C shown in fig. 6 (a);

FIG. 7 is a schematic view of the overall structure of the mounting flange;

FIG. 8 is a top view of the mounting flange;

the welding wire welding device comprises 1, a mounting flange, 1-1, a fixing hole, 1-2, a through hole, 1-3, a strip hole, 1-4, a positioning hole, 1-5, a positioning unthreaded hole, 2, an electric arc generating mechanism, 2-1, an air pipe connector, 2-2, a first quick connector, 2-3, a tightening nut, 2-4, a conducting nozzle, 2-5, a tungsten electrode clamp, 2-6, a tungsten needle, 3, a threaded water nozzle, 4, a fixing seat, 4-1, an insulating cover, 4-2, a cooling device, 4-3, a mounting hole, 4-4, a cooling channel, 4-5, a side hole, 4-6, a tail part 5, a multi-wire mounting head, 5-1, a wire feeding hole, 5-2, a second quick connector, 5-3, a wire feeding nozzle and 6 and welding wires.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.

Example 1:

fig. 1 and 2 show a multi-wire arc additive manufacturing device in the present embodiment, which comprises a mounting flange 1, an arc generating mechanism 2, a fixing seat 4 and a multi-wire mounting head 5.

Wherein, as shown in fig. 7 and 8, mounting flange 1 includes backup pad and splice bar, and the backup pad passes through screw connection with the splice bar in this embodiment, specifically, is 90 distribution between backup pad and the splice bar, is provided with a plurality of screw holes on the terminal surface of one end of splice bar towards the backup pad, and the backup pad corresponds the position and is provided with a plurality of through-holes, and the screw passes through-hole screw in screw hole, and then realizes fixing between backup pad and the splice bar.

As shown in fig. 7, a plurality of positioning holes 1-4 are formed in one end of the support plate far away from the connecting rib, the whole device can be fixed on a robot arm through the positioning holes 1-4 (in this embodiment, a KUKA six-axis robot arm is adopted), in addition, 2 groups of positioning light holes 1-5 are further formed in the support plate, the setting positions of the positioning light holes 1-5 are in one-to-one correspondence with the light holes on the robot arm, and when the positioning light holes are installed, the light holes 1-5 of the upper group and the lower group are aligned with the light holes of the KUKA six-axis robot in a concentric mode so as to maintain the precision of the whole multi-wire device.

As shown in fig. 7 and 8, a fixing hole 1-1 and a locking component are arranged at one end of the connecting rib, which is far away from the supporting plate, the locking component in the embodiment is a screw and a strip hole 1-3, one end of the strip hole 1-3 is communicated with the fixing hole 1-1, the other end extends towards the supporting plate, screw holes and through holes 1-2 are respectively arranged on two long sides of the strip hole 1-3, wherein the through holes 1-2 are arranged on the long sides at the outer side, the screw holes are arranged on the long sides at the inner side, during installation, the fixing hole 1-1 is sleeved on the outer side of the fixing seat 4, and then the screw is screwed to clamp the fixing seat 4.

As shown in fig. 6, the arc generating mechanism 2 in this embodiment includes an air pipe connector 2-1, a first quick connector 2-2, a tightening nut 2-3, a conductive nozzle 2-4, a tungsten electrode clip 2-5 and a tungsten needle 2-6 which are coaxially connected in sequence, wherein the air pipe connector 2-1 is directly inserted into the first quick connector 2-2, the air pipe connector 2-1 is used for accessing a protective gas, and the protective gas and a TIG arc tungsten electrode are coaxially transmitted; the first quick connector 2-2 is arranged at one end of the jacking screw cap 2-3 in a rotating way, so that the tungsten electrode needle is convenient to detach and replace, the other end of the jacking screw cap 2-3 is connected with one end of the conductive nozzle 2-4, and the conductive nozzle 2-4 is screwed at the mounting hole 4-3 in the cooling device 4-2 through threads; the other end of the conducting nozzle 2-4 is inserted into a tungsten electrode clamp 2-5, and a tungsten needle 2-6 is inserted into the tungsten electrode clamp 2-5; it should be noted that: in the embodiment, the conducting nozzle 2-4, the tungsten electrode clamp 2-5 and the tungsten electrode are all made of red copper so as to be convenient for conducting electricity.

As shown in fig. 3, the fixing seat 4 in this embodiment includes an insulating cover 4-1 and a cooling device 4-2, wherein the insulating cover 4-1 made of polytetrafluoroethylene is sleeved on the outer side of the cooling device 4-2 and is in threaded connection with the multi-wire mounting head 5, and it should be noted that: by arranging the insulating cover 4-1 between the multi-wire mounting head 5 and the cooling device 4-2, the electric arc generating mechanism 2 and the cooling device 4-2 are insulated with the multi-wire mounting head 5 together, so that the welding wire and the tungsten electrode are not in the same potential, and the tungsten electrode is electrified to heat and melt the welding wire, thereby avoiding the welding wire from being directly inserted into a molten pool to form a short circuit. In addition, the insulating cover 4-1 in this embodiment is a stepped boss structure, and one end with a smaller diameter is provided with external threads for fixation.

As shown in fig. 4 and 5, the cooling device 4-2 in this embodiment is made of red copper, the axis position of the cooling device is provided with a mounting hole 4-3, an internal thread is arranged in the mounting hole 4-3, one side of the mounting hole 4-3 is provided with a cooling channel 4-4, the cooling channel 4-4 in this embodiment is of a U-shaped structure, and the cooling device comprises a liquid inlet channel, a liquid outlet channel and a liquid guide channel which communicates the two channels, wherein the liquid guide channel is positioned in the cooling device 4-2, and the liquid inlet channel and the liquid outlet channel are arranged parallel to the axis of the cooling device 4-2; in addition, the liquid inlet of the cooling channel 4-4 is provided with the threaded water nozzle 3, when in use, the liquid injection pipeline containing the cable is connected into the threaded water nozzle 3, so that not only can liquid be fed for cooling, but also the power supply of the TIG welding machine can be connected into the cooling device 4-2 and the electric arc generating mechanism 2, and the cooling liquid flows into the liquid outlet through the liquid guide channel so as to achieve the effect of cooling the electric arc generating mechanism 2; because the liquid guide channel is disposed inside the cooling device 4-2, for convenience in processing, the cooling device 4-2 in this embodiment is further provided with a side hole 4-5, the side hole 4-5 is coaxial with the liquid guide channel, and is used as an intervention channel of a processing device, and in order to avoid leakage of the position of the side hole 4-5, a plug (not shown in the figure) is further provided to plug the side hole 4-5.

In addition, the cooling device 4-2 in this embodiment is provided with a tail portion 4-6, and the tail portion 4-6 is provided with a clamping groove for realizing the clamping connection between the cooling device 4-2 and the insulating cover 4-1, and in addition, the tail portion 4-6 extends to the outside of the multi-wire mounting head 5, so that the protective gas acting on the molten pool is more concentrated, and the protective effect of the protective gas is improved.

As shown in fig. 3, the multi-wire mounting head 5 in this embodiment is provided with a central hole along the axial direction, an internal thread is arranged in the central hole, the fixing seat 4 is detachably arranged in the central hole through a thread structure, in addition, a plurality of wire feeding holes 5-1 are uniformly distributed around the fixing seat 4 on the multi-wire mounting head 5, the number of the wire feeding holes 5-1 can be increased or decreased as required, but not less than 3, in this embodiment, 4 wire feeding holes 5-1 are sequentially provided with a second quick connector 5-2 and a wire feeding nozzle 5-3 along the wire outlet direction, and the second quick connector 5-2 enables welding wires 6 with different specifications and types to be directly inserted into the wire feeding nozzle 5-3 through the second quick connector 5-2, and the disassembly is convenient; it should be noted that: on the one hand, the wire feeding nozzle 5-3 is easy to be worn in the working process under the influence of the working environment, and the wire feeding nozzle 5-3 is detachably arranged in the wire feeding channel in the embodiment, so that the maintenance of the wire feeding nozzle 5-3 is facilitated; on the other hand, during operation, welding wires 6 with different specifications are selected according to different process parameters, the second quick connector 5-2 is detachably arranged in a wire feeding channel, the wire feeding nozzles 5-3 and the welding wires 6 with different specifications are convenient to detach and replace, when the multi-wire mounting head 5 in the embodiment is used, the graphite wire feeding barrel is directly inserted into the wire feeding hole 5-1 through the second quick connector 5-2, the welding wires 6 are gathered around the tungsten needle 2-6 through the wire feeding nozzles 5-3 in the wire feeding hole 5-1, the incidence angle of each group of welding wires 6 and the multi-wire mounting head 5 in the central direction is 45-70 degrees, the incidence angle can be adjusted through the use of the multi-wire mounting head 5 with different dip angles of the wire feeding holes 5-1, in addition, the diameter of the multi-wire welding shell is 100mm, the center distance between the four wire feeding holes 5-1 is 13-14mm, and the multi-wire mounting shell and the wire feeding nozzle 5-3 are all made of red copper.

The working principle of the multi-wire arc additive manufacturing device in the embodiment is as follows:

four groups of TIG arc welders are respectively connected with four groups of wire feeding nozzles 5-3, proper technological parameters are set, synchronous wire feeding signals of the wire feeding machines are given, the four wire feeding machines can independently alternate wire feeding clockwise or anticlockwise, wire feeding can also be synchronously carried out, and welding wires 6 with different components and sizes can be selected according to the components of a piece to be welded to realize additive manufacturing; the welding wires 6 with different components can be set to realize the adjustment of alloy components in additive manufacturing through TIG electric arc at the same or different wire feeding speeds; in the additive manufacturing process, the arc is extremely stable under inert protective gas, and the protective gas and the tungsten needle 2-6 are coaxially discharged at the moment to protect a molten pool from being oxidized; the device has the advantages of simple structure, small volume, easy disassembly, maintenance and convenient use, and the welding wire 6 simultaneously works in the molten pool.

Example 2:

unlike embodiment 1, the support plate and the connecting rib are integrally formed in this embodiment.

The principles and embodiments of the present utility model have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present utility model; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In summary, the present description should not be construed as limiting the utility model.

Claims (10)

1. The multi-wire arc additive manufacturing device is characterized by comprising a multi-wire mounting head, an insulating cover, a cooling device and an arc generating mechanism, wherein the multi-wire mounting head is sleeved outside the insulating cover along the axial direction, the cooling device is sleeved inside the insulating cover, a cooling channel is arranged inside the cooling device, a mounting hole is formed in the axial position of the cooling device, the arc generating mechanism is arranged in the mounting hole, and a tungsten needle of the arc generating mechanism extends to the outside of the multi-wire mounting head; the multi-wire mounting head is uniformly provided with a plurality of wire feeding holes around the insulating cover, the number of the wire feeding holes is not less than 3, and the extension lines of the tungsten needles are intersected with the extension lines of the wire feeding holes at one point.

2. The apparatus of claim 1, wherein the multi-wire arc additive manufacturing head is detachably connected to the insulating cover by a screw structure.

3. A multi-wire arc additive manufacturing device according to claim 1 or 2, wherein a screw-threaded water nozzle is provided at the liquid inlet of the cooling device.

4. A multi-wire arc additive manufacturing apparatus according to claim 3, wherein the cooling channel has a U-shaped structure, which is disposed at one side of the mounting hole, and the liquid inlet channel and the liquid outlet channel of the cooling channel are disposed parallel to the axis of the cooling device.

5. The multi-wire arc additive manufacturing device according to claim 4, wherein the arc generating mechanism further comprises an air pipe joint, a quick joint, a tightening nut, a contact tip and a tungsten electrode clamp for fixing the tungsten needle, which are coaxially connected in sequence, and the contact tip is in threaded connection with the mounting hole.

6. The multi-wire arc additive manufacturing device according to claim 1, wherein a quick connector and a wire feeding nozzle are detachably connected in the wire feeding hole, welding wires of different specifications are directly inserted into the wire feeding nozzle through the quick connector, and the inner diameter of the wire outlet end of the wire feeding nozzle is matched with the diameter of the welding wires.

7. The multi-wire arc additive manufacturing device according to claim 1, further comprising a mounting flange, wherein the mounting flange comprises a connecting rib, one end of the connecting rib is provided with a fixing hole and a locking assembly, the fixing hole is sleeved on the outer side of the insulating cover, and the locking assembly is used for locking the insulating cover.

8. The multi-wire arc additive manufacturing device according to claim 7, wherein the mounting flange further comprises a support plate, one end, away from the fixing hole, of the connecting rib is provided with a plurality of screw holes, and the connecting rib is connected with the support plate through screws.

9. The apparatus of claim 7, wherein the mounting flange further comprises a support plate, the connecting ribs and the support plate being integrally formed.

10. The multi-wire arc additive manufacturing device according to claim 8 or 9, wherein a plurality of positioning holes and positioning unthreaded holes are formed in the supporting plate, the supporting plate is fixedly connected with the welding robot arm through the positioning holes, and the positioning unthreaded holes are in one-to-one correspondence with unthreaded holes in the welding robot arm.