CN112589300A

CN112589300A - Laser welding wire feeding nozzle with automatic wire drawing function

Info

Publication number: CN112589300A
Application number: CN202011531373.3A
Authority: CN
Inventors: 张海华; 王鑫; 左玉强; 赵振杰; 董建建
Original assignee: Tianjin Ship Repair Technology Research Institute No 6313 Research Institute Of China Shipbuilding Industry Corp
Current assignee: Tianjin Ship Repair Technology Research Institute No 6313 Research Institute Of China Shipbuilding Industry Corp
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-04-02

Abstract

The invention discloses a laser welding wire feeding nozzle with an automatic wire drawing function, which comprises a wire penetrating rod, a fixed sleeve, an end cover, a spring, a copper nozzle and a sealing ring, wherein a threaded hole is formed in the middle of the front end of the wire penetrating rod and is in threaded connection with the rear end of the copper nozzle, the wire penetrating rod is sleeved in the fixed sleeve, the end cover is respectively fixed at the front end and the rear end of the fixed sleeve, the two ends of the wire penetrating rod respectively penetrate through the end cover, the sealing ring is arranged at the intersection part of the wire penetrating rod and the end cover, the spring is sleeved on one side of the front end of the wire penetrating rod, a preset gap is reserved between one side of the rear end and the end cover, a compressed air inlet is formed in the rear end cover, compressed air is blown into the preset gap space through the compressed air inlet, and the wire penetrating rod can move back and. The wire feeding nozzle can solve the technical problems of welding wire adhesion and welding wire tail melting and balling, and improves the quality stability and consistency of laser wire feeding welding.

Description

Laser welding wire feeding nozzle with automatic wire drawing function

Technical Field

The invention relates to a wire feeding nozzle, in particular to a wire feeding nozzle for laser welding.

Background

Laser welding has higher requirements on the width of a seam of a welding seam, the seam is difficult to realize by direct fusion welding when the width of the seam is more than 0.3mm, a wire feeding mode is required, but the laser wire feeding welding has some technical problems, such as adhesion between a welding wire and a welding bead during welding ending, incapability of continuous welding caused by melting and pilling at the tail of the welding wire and the like, the quality stability and consistency of the laser wire feeding welding are reduced, the wide popularization of the technology is limited, the method for realizing wire drawing by reversely rotating a wire feeding motor in the market at present is widely adopted, but the method has the conditions of untimely and unstable wire drawing due to the overlong wire feeding pipe, and the problems can not be thoroughly solved.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a laser welding wire feeding nozzle with an automatic wire drawing function, which improves the quality stability and consistency of laser wire feeding welding.

The invention relates to a laser welding wire feeding nozzle with an automatic wire drawing function, which comprises a wire penetrating rod, wherein a threaded hole is formed in the middle of the front end of the wire penetrating rod, the rear end of a copper nozzle is in threaded connection with the threaded hole, a wire penetrating hole is formed in the central shaft of the wire penetrating rod and the central shaft of the copper nozzle, the wire penetrating rod is sequentially divided into a front section rod, a middle section rod and a rear section rod from front to back, the diameters of cylinders of the front section rod and the rear section rod are consistent, the diameter of the front section rod is smaller than that of the middle section rod, the middle section rod of the wire penetrating rod is a cylinder section and a cone section which are sequentially arranged from front to back, the diameter of the front wall of the cone section is smaller than that of the rear wall of the cone section, the wire penetrating rod is sleeved in a fixing sleeve, and end covers are respectively fixed at the front end;

the front section rod and the rear section rod of the wire penetrating rod respectively penetrate through the end covers on the front side and the rear side, a sealing ring is arranged at the intersection part of the front section rod and the rear section rod of the wire penetrating rod and the end covers, a spring is sleeved on the front section rod between a front shaft shoulder of the wire penetrating rod formed by reducing the diameters of the front section rod and the middle section rod and the front end cover, a positioning shaft shoulder is arranged on the inner wall of a fixing sleeve at the position corresponding to the front shaft shoulder of the wire penetrating rod, and the outer side of the front shaft shoulder of the wire penetrating rod can be tightly pressed against the positioning shaft shoulder; when the shaft shoulder is in the position of compressing tightly the location shaft shoulder before the wire rod, middle section pole and fixed cover between connection structure be: a preset gap is reserved between the rear wall of the middle rod and the front wall of the end cover at the rear end, the shape of the inner wall of the fixing sleeve at the rear side of the positioning shaft shoulder in the length range of the middle rod is matched with the shape of the middle rod and is tightly contacted with the middle rod, and the diameter of the inner wall of the fixing sleeve at the position corresponding to the preset gap is consistent with the diameter of the rear end of the conical section;

the end cover at the rear end is provided with a compressed air inlet, compressed air is blown into a preset gap space through the compressed air inlet, and the wire penetrating rod can move back and forth in the fixed sleeve under the action of the compressed air and the spring.

The invention has the beneficial effects that:

1. the technical problems of welding wire adhesion and welding wire tail melting and pilling can be solved, and the quality stability and consistency of laser wire feeding welding are improved;

2. the reaction is sensitive, and the spinning effect is good;

3. the method is realized without adopting an electric control mode, and the cost is low.

Drawings

Fig. 1 is a schematic structural diagram of a laser welding wire feeding nozzle with an automatic wire drawing function according to the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

The laser welding wire feeding nozzle with the automatic wire drawing function comprises a wire feeding rod 1, wherein a threaded hole is formed in the middle of the front end (in the direction A in the drawing) of the wire feeding rod 1, the rear end of a copper nozzle 5 is in threaded connection with the threaded hole, and the copper nozzle 5 can be replaced at any time after being burnt after being used for a long time. The rear end (B direction in the figure) of the threading rod 1 is connected with a wire feeding pipe (not shown in the figure) through screw threads. And a wire feeding hole is formed in the central shaft of the wire feeding rod 1 and the copper nozzle, and a welding wire enters the wire feeding hole in the center of the wire feeding rod 1 through the wire feeding pipe and is fed to a welding part through the copper nozzle 5 to realize laser wire feeding welding.

The utility model discloses a lead screw, including lead screw 1, preceding section pole, middle section pole, cone section 7, lead screw 1, preceding section pole and back end pole, lead screw 1 is divided into anterior section pole, middle section pole and back end pole in proper order after to in the past, wherein the cylinder diameter of anterior section pole and back end pole is unanimous and anterior section pole diameter is less than the diameter of middle section pole, the middle section pole of lead screw 1 be cylinder section and cone section 7 that set gradually after to in the past, the antetheca diameter of cone section 7 be less than the back wall diameter of cone section 7, 1 cover of lead screw in fixed cover 2 the front end and the rear end of fixed cover.

The front section rod and the rear section rod of the threading rod 1 respectively penetrate through the end covers 3 on the front side and the rear side, and sealing rings are arranged at the intersection parts of the front section rod and the rear section rod of the threading rod 1 and the end covers 3. A spring 4 is sleeved on the front section rod between the front shaft shoulder of the wire penetrating rod formed by reducing the diameter of the front section rod and the middle section rod and the front end cover, a positioning shaft shoulder is arranged on the inner wall of the fixing sleeve 2 corresponding to the front shaft shoulder of the wire penetrating rod, and the outer side of the front shaft shoulder of the wire penetrating rod can be tightly pressed against the positioning shaft shoulder; when the shaft shoulder is in the position of compressing tightly the location shaft shoulder before the wire rod, middle section pole and fixed cover 2 between connection structure be: a preset gap is reserved between the rear wall of the middle rod and the front wall of the end cover 3 at the rear end, the shape of the inner wall of the fixing sleeve 2 at the rear side of the positioning shaft shoulder in the length range of the middle rod is matched with the shape of the middle rod and is in close contact with the middle rod, and the diameter of the inner wall of the fixing sleeve 2 at the position corresponding to the preset gap is consistent with the diameter of the rear end of the conical section 7. The conical section is in close contact with the conical surface on the inner side of the fixed sleeve 2 under the pushing of compressed air, so that the lead screw 1 can be kept stable and does not shake in the wire feeding process, and the welding stability is improved.

The end cover 3 at the rear end is provided with a compressed air inlet through which compressed air is blown into a preset gap space, and the wire penetrating rod 1 can move back and forth in the fixed sleeve 2 under the action of the compressed air and the spring 4.

Preferably, a sealing ring is arranged between the front end of the middle rod and the fixed sleeve 2.

During the use, fixed cover 2 outside is fixed in on the laser welding head, fixed cover 2 both ends have end cover 3 and sealing washer 6 to carry out the space and seal, fixed cover 2 inside front side installation spring 4 for will wear lead screw 1 to push away to the rear side when stopping the welding and realize taking out the silk rapidly, fixed cover 2 inside rear side leaves certain space, leaves the compressed air entry on this side end cover 3 simultaneously, be used for will wearing lead screw 1 to push away to the front side through compressed air in welding process, realize stably sending a silk.

According to the invention, the welding wire moves towards the A direction and the B direction through two opposite acting forces of compressed air and the spring 4, so that rapid wire drawing is realized, the technical problems of welding wire adhesion and welding wire tail melting and pilling in laser wire feeding welding are solved, and the quality stability and consistency of the laser wire feeding welding are improved.

The invention realizes the drawing back of the welding wire through the spring 4, and has sensitive reaction, rapid drawing and stable effect.

The wire penetrating rod 1 is pushed by compressed air to pre-tighten the spring 4, the acting force is continuous and stable, and the wire feeding stability in the welding process can be ensured.

The use method of the wire feeding nozzle comprises the following steps:

fixed cover 2 of sending the silk mouth is fixed in on the laser welding head through fixture, aims at welding position with copper nozzle 5, will wear 1 rear end of lead screw and send the silk pipe of silk machine to link to each other, lets in compressed air into the compressed air entry, and compressed air opens when sending a silk welding, wears lead screw 1 to A direction removal and send a silk welding, and compressed air closes when stopping the welding, and spring 4 will wear lead screw 1 to push to the B direction, realizes taking out the silk.

Claims

1. A laser welding wire feed nozzle with automatic wire drawing function is characterized in that: comprising a threading rod, a threaded hole is opened in the middle of the front end of the threading rod, and the rear end of the copper nozzle is threadedly connected with the threaded hole , a threading hole is opened at the central axis of the threading rod and the copper nozzle, and the threading rod is divided into a front-section rod, a middle-section rod and a rear-section rod in turn from front to back, wherein the front-section rod and the rear-section rod are divided into The diameter of the cylinder is the same and the diameter of the front rod is smaller than the diameter of the middle rod. The middle rod of the threading rod is a cylindrical section and a cone section arranged in sequence from front to back, and the diameter of the front wall of the cone section is smaller than the rear wall of the cone section. diameter, the threading rod is sheathed in a fixed sleeve, and end caps are respectively fixed at the front end and the rear end of the fixed sleeve;

The front rod and the rear rod of the threading rod pass through the end covers on the front and rear sides respectively, and a sealing ring is provided at the intersection of the front rod and the rear rod of the threading rod and the end cover. A spring is sleeved on the front rod between the front shoulder of the threading rod and the front end cover formed by the diameter reduction of the front rod and the middle rod, and the inner wall of the fixed sleeve corresponding to the front shoulder of the thread rod is provided with Positioning shoulder, the outer side of the front shoulder of the screw rod can press the positioning shoulder; when the front shoulder of the screw rod is in the position of pressing the positioning shoulder, the middle rod and the fixed sleeve are connected. The connection structure is as follows: a predetermined gap is left between the rear wall of the middle rod and the front wall of the end cover at the rear end, and the shape of the inner wall of the fixing sleeve on the rear side of the positioning shoulder within the length of the middle rod is the same as the shape of the inner wall. The shape of the middle rod is consistent and in close contact, and the inner wall diameter of the fixing sleeve at the position corresponding to the predetermined gap is consistent with the diameter of the rear end of the conical section;

A compressed air inlet is opened on the end cover at the rear end, the compressed air is blown into the predetermined clearance space through the compressed air inlet, and the threading rod can move back and forth in the fixed sleeve under the action of the compressed air and the spring.

2 . The laser welding wire feed nozzle with automatic wire drawing function according to claim 1 , wherein a sealing ring is arranged between the front end of the middle rod and the fixing sleeve. 3 .