CN-117464160-B - Friction stir welding equipment capable of adjusting rotating speed in grading manner for thick plates

CN117464160BCN 117464160 BCN117464160 BCN 117464160BCN-117464160-B

Abstract

The invention provides friction stir welding equipment for graded rotation speed adjustment of thick plates, which comprises a welding equipment body, wherein a split stirring needle is arranged at the front end of the welding equipment body, at least a first rotating device and a second rotating device are arranged in the welding equipment body, the split stirring needle at least comprises a first stirring needle and a second stirring needle, the first rotating device and the second rotating device respectively correspondingly drive the first stirring needle and the second stirring needle, sealing grooves are formed in the connecting positions of the first stirring needle and the second stirring needle, and sealing balls are matched between the first stirring needle and the second stirring needle through the sealing grooves to realize relative rotation. According to the invention, the split stirring pin is matched with at least two sets of rotating devices, so that the rotation speeds of the stirring pins of each segment of the split stirring pin are different, the input heat of the plate along the thickness direction is uniform, and the welding defect caused by nonuniform heat input during thick plate welding can be effectively solved.

Inventors

LI BEIBEI
TONG YANJUN
WANG JINGFENG
HU JIANXIANG
LI GUOQIANG
LIN SONG
OUYANG YUANWEN
LIU XIAOWEI

Assignees

合肥工业大学

Dates

Publication Date: 20260512
Application Date: 20231201

Claims (7)

1. The friction stir welding equipment for the thick plate adjustable rotating speed in a grading manner is characterized by comprising a welding equipment body (1), wherein a split stirring needle (3) is arranged at the front end of the welding equipment body (1), at least a first rotating device and a second rotating device are arranged in the welding equipment body, the split stirring needle (3) at least comprises a first stirring needle (301) and a second stirring needle (303), and the first rotating device and the second rotating device respectively correspondingly drive the first stirring needle (301), The second stirring pin (303), the junction of first stirring pin (301) and second stirring pin (303) all is equipped with sealed recess (304), be used for realizing relative rotation through sealed recess (304) cooperation sealed ball (302) between first stirring pin (301) and the second stirring pin (303), first rotary device is including fixed first stirring pin fixed top section of thick bamboo (4) of installing in welding equipment body (1), first stirring pin fixed top section of thick bamboo (4) bottom rotates and is connected with first rotary drum (8), has cup jointed first rotary drum big conical gear (11) on first rotary drum (8), fixed mounting has first motor (7) in welding equipment body (1), first motor (7) are used for driving first rotary drum (8) rotation through the meshing of first rotary drum small conical gear (12) with first rotary drum big conical gear (11), the bottom of first rotary drum (8) bear and rotate and connect in welding equipment body (1) bottom and pass through transition device (2) connection first stirring pin fixed top (5) of installing in second rotary drum (1), the second rotating cylinder (9) is sleeved with a second rotating cylinder big conical gear (13), a second motor (6) is fixedly arranged in the welding equipment body (1), a rotating shaft of the second motor (6) penetrates through a side wall hole (401) of the first stirring pin fixed type top cylinder (4) and is meshed with the second rotating cylinder big conical gear (13) through a second rotating cylinder small conical gear (14) to drive the second rotating cylinder (9) to rotate, the second rotating cylinder (9) and the first rotating cylinder (8) are coaxially arranged and fixed in a left-right circumferential limit mode through a rotating fixed bearing (15), the bottom end of the second rotating cylinder (9) is fixedly connected with a second stirring pin (303) through a transition device (2), the transition device (2) comprises a cylinder type transition shaft (201) and a rod type transition shaft (202), the cylinder type transition shaft (201) and the first rotating cylinder (8) are connected through a large flange plate (204) through bolts, the rod type transition shaft (202) and the second rotating cylinder (9) are connected with a small flange plate (205) through a rod type transition shaft (201) and a right-side transition shaft (201) through a left-right circumferential limit bearing (16) in a fixed mode, the two stirring needles can rotate relatively, the cylinder type transition shaft (201) is connected with the first stirring needle (301) through a cylinder type transition shaft threaded column (203), and the rod type transition shaft (202) is connected with the second stirring needle (303) through threads.
2. The friction stir welding equipment for the thick plate adjustable rotating speed in a grading manner is characterized in that annular ball grooves are formed in the top end of the first rotating cylinder (8) and the bottom end of the first stirring pin fixed type top cylinder (4), balls are placed in the annular ball grooves and can not move up and down by means of relative rotation of the balls, annular ball grooves are formed in the top end of the second rotating cylinder (9) and the bottom end of the second stirring pin fixed type top cylinder (5), balls are placed in the annular ball grooves and can not move up and down by means of relative rotation of the balls, and balls are placed between the annular ball grooves in the lower wall of the first rotating cylinder (8) and the annular ball grooves formed in the inner bottom of the welding equipment body (1).
3. The friction stir welding equipment for the thick plate graded rotation speed adjustment according to claim 1, further comprising a clamping plate device (10), wherein the clamping plate device (10) comprises a clamping plate (1011) and a clamping plate base (1008), the clamping plate base (1008) is fixedly connected with the inner wall of the welding equipment body (1), the number of the clamping plates (1011) is two, the clamping plates are oppositely arranged and realize relative sliding clamping through two parallel sliding clamping grooves (1010) on the clamping plate base (1008), annular ball sliding grooves (1009) are formed in the side walls of the clamping plates (1011) and the first rotating cylinder (8), balls are arranged on the side walls of the clamping plates (1011), and when the first rotating cylinder (8) is clamped through the two clamping plates (1011) adjustment, the relative rotation of the first rotating cylinder (8) can be realized through the balls.
4. The friction stir welding equipment for the thick plate graded rotation speed adjustment according to claim 3, further comprising an adjusting bolt (1006) and a limit bolt base (1007), wherein the limit bolt base (1007) is connected with a clamp plate base (1008) through bolts, the adjusting bolt (1006) is fixed with the side surface of the limit bolt base (1007) through threads and is used for driving and adjusting one clamping plate (1011) to move left and right along a sliding clamping groove (1010), the upper end and the lower end of the two clamping plates (1011) are respectively provided with a first parallel transmission rectangular rack (1003) and a second transmission rectangular rack (1004), the first transmission rectangular rack (1003) and the second transmission rectangular rack (1004) are respectively meshed with a straight gear (1005) arranged on the clamp plate base (1008), the first transmission rectangular rack (1003) and the second transmission rectangular rack (1004) are respectively fixedly connected with the two clamping plates (1011) through hexagonal nuts (1001) and fixing bolts (1002), and when the adjusting bolt (1006) is used for adjusting, the two clamping plates (1011) are respectively provided with a first rectangular transmission rectangular rack (1003), a second rectangular rack (1005) and a second transmission rectangular rack (1005) through a space.
5. Friction stir welding equipment with graduated speed regulation for thick plates according to claim 3, characterized in that the clamping means (10) are placed one each at intervals up and down the first rotating cylinder (8).
6. The friction stir welding equipment for the graded rotation speed adjustment of thick plates according to claim 1, wherein the welding equipment body (1) is a box-type shell, and is formed by welding a left side wall (101), a right side wall (102), a front side wall, a rear side wall, a top plate (103) and a bottom plate (104).
7. The friction stir welding equipment for the thick plate with the rotating speed capable of being adjusted in a grading manner according to claim 1, wherein the split stirring pin (3) is conical, the first stirring pin (301) is located at the root part, and the second stirring pin (303) is located at the tip part.

Description

Friction stir welding equipment capable of adjusting rotating speed in grading manner for thick plates Technical Field The invention relates to the technical field of friction stir welding, in particular to friction stir welding equipment capable of adjusting rotating speed of thick plates in a grading manner. Background Friction stir welding is a technology which utilizes the intense friction generated between a stirring head shaft shoulder rotating at a high speed and a stirring pin and a welded workpiece to generate heat, so that the temperature of a connecting part is increased, and softened materials are subjected to plastic flow under the drive of the stirring pin, and finally the connection is formed. Since the technology has been invented, the welded joint has excellent mechanical properties and small welding deformation, and has become an industrial and practical solid phase connection technology capable of replacing fusion welding technology in the structural manufacture of nonferrous metals, particularly aluminum alloy and the like. At present, stirring heads adopted by friction stir welding are various in types, but most stirring heads are designed integrally, and the whole stirring heads can only work at the same rotating speed in a rotating mode. The diameter of the root of the stirring pin is larger, the diameter of the tip of the stirring pin is smaller, the stirring pin is conical and is different from the contact area of the stirring pin and the plate, the heat input quantity of the plate in the thickness direction is uneven at the same rotation speed, and the uneven heat input quantity is further aggravated by friction heat generation between the shaft shoulder and the surface of the plate. Particularly for thick plate welding, the uneven heat input quantity leads to insufficient stirring and incomplete penetration at the bottom of the plate, and the defect problem is easy to occur. Disclosure of Invention In order to solve the problems, the invention aims to provide friction stir welding equipment capable of adjusting the rotating speed of thick plates in a grading manner, and the split stirring pin is provided with at least two sets of rotating devices, so that the rotating speeds of the stirring pins of the split stirring pin are different, the input heat of the plate in the thickness direction is uniform, and the welding defect caused by nonuniform heat input during thick plate welding can be effectively solved. In order to achieve the above purpose, the technical scheme of the invention is realized as follows: The utility model provides a friction stir welding equipment to thick plate scalable regulation rotational speed, includes the welding equipment body, welding equipment body front end is equipped with split type stirring needle, and inside is provided with first rotating device and second rotating device at least, split type stirring needle includes first stirring needle and second stirring needle at least, first rotating device and second rotating device correspond respectively drive first stirring needle, second stirring needle, the junction of first stirring needle and second stirring needle all is equipped with sealed recess, is used for realizing relative rotation through sealed ball of sealed recess cooperation between first stirring needle and the second stirring needle. Further, the first rotating device comprises a first stirring pin fixed type top cylinder fixedly installed in the welding equipment body, the bottom end of the first stirring pin fixed type top cylinder is rotationally connected with a first rotating cylinder, a first rotating cylinder big conical gear is sleeved on the first rotating cylinder, a first motor is fixedly installed in the welding equipment body, the first motor is meshed with the first rotating cylinder big conical gear through a first rotating cylinder small conical gear and is used for driving the first rotating cylinder to rotate, and the bottom end of the first rotating cylinder is borne and rotationally connected to the bottom in the welding equipment body and is in driving connection with the first stirring pin through a transition device. Further, the second rotating device comprises a second stirring pin fixed type top cylinder fixedly installed in the welding equipment body, a second rotating cylinder is rotatably connected to the bottom end of the second stirring pin fixed type top cylinder, a second rotating cylinder big conical gear is sleeved on the second rotating cylinder, a second motor is fixedly installed in the welding equipment body, a rotating shaft of the second motor penetrates through a side wall hole of the first stirring pin fixed type top cylinder to be matched with a second rotating cylinder small conical gear to be meshed with the second rotating cylinder big conical gear so as to drive the second rotating cylinder to rotate, the second rotating cylinder and the first rotating cylinder are coaxially placed, the