CN111975190B

CN111975190B - Friction stir welding constant pressure structure device

Info

Publication number: CN111975190B
Application number: CN202010930397.XA
Authority: CN
Inventors: 雷勋发; 张新胜; 罗益
Original assignee: Hunan Kunding Cnc Technology Co ltd
Current assignee: Hunan Kunding Cnc Technology Co ltd
Priority date: 2020-09-07
Filing date: 2020-09-07
Publication date: 2022-03-18
Anticipated expiration: 2040-09-07
Also published as: CN111975190A

Abstract

The invention relates to the technical field of friction stir welding constant pressure structure devices, in particular to a friction stir welding constant pressure structure device which comprises a device main body, wherein the device main body comprises a lead screw, adjusting washers are fixedly arranged on two sides of the lead screw, a planar ball bearing is fixedly arranged at the top end of each adjusting washer, and a strain type pressure sensor is fixedly arranged at the top end of each planar ball bearing. Compared with a main shaft pressure sensor or other pressure bearing sensors, the main shaft pressure sensor or other pressure bearing sensors are simple in structure, low in cost, good in welding effect, free of a constant pressure system, large in welding accumulation and large in flash. The welding seam is straight and has no flash and burr after constant pressure welding, follow-up tracking is realized in the welding process, the pressing amount of the shaft shoulder of the stirring tool is automatically controlled according to the pressure value fed back by the sensor, the surface of a workpiece is more attractive, welding flash hardly exists, and the subsequent flash grinding process steps are reduced.

Description

Friction stir welding constant pressure structure device

Technical Field

The invention relates to the technical field of friction stir welding constant pressure structure devices, in particular to a friction stir welding constant pressure structure device.

Background

During friction stir welding, the pressure applied by the pin to the workpiece has a significant effect on the quality of the weld. In actual production, due to the fact that the surface of a welding seam is uneven and a workpiece deforms, the contact condition of the stirring pin and the workpiece is changed constantly during welding, and pressure is unstable. When the welding pressure is too small, the welded joint cannot form a compact structure, so that the strength of the joint is reduced; when the welding pressure is too large, the friction between the stirring needle and the workpiece generates too high heat, and the defects of holes, tunnels and the like are easily formed in the joints. Therefore, it is difficult for friction stir welding equipment without a pressure control function to obtain stable and reliable welding quality. Obviously, the pressure control function is crucial to ensure the quality of friction stir welding. At present, most of domestic friction stir welding machines have no related functions, and the pressure in the welding process cannot be effectively controlled.

Disclosure of Invention

The invention aims to provide a constant-pressure structural device for friction stir welding, which aims to solve the problems that stable and reliable welding quality is difficult to obtain by friction stir welding equipment without a pressure control function in the background art, and meanwhile, most of domestic friction stir welding machines have no related function and cannot effectively control the pressure in the welding process.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a friction stir welding constant pressure constructional device, includes the device main part, the device main part includes the lead screw, the all fixed mounting in both sides of lead screw has the adjusting washer, the top fixed mounting of adjusting washer has planar ball bearing, planar ball bearing's top fixed mounting has strain type pressure sensor, strain type pressure sensor's top is placed and is installed the bearing frame, the bottom of bearing frame is provided with coupling mechanism, coupling mechanism includes the connecting rod, the all fixed mounting in both sides of bearing frame bottom has the connecting rod, two the connecting rod is close to each other the all fixed mounting in one side has the slider, the spout has all been seted up to strain type pressure sensor's both sides, slider slidable mounting is to the inside of spout.

Preferably, the both sides of bearing frame all are provided with heat-proof mechanism, heat-proof mechanism includes the mounting groove, the mounting groove has all been seted up to the both sides of bearing frame, and every group the quantity of mounting groove is two, the installation piece is all inserted to the inside of mounting groove and is installed, both sides the installation piece is the all fixed mounting in one side of keeping away from each other has the heat insulating board.

Preferably, a first cavity is formed in one side, close to each other, of the mounting block and the mounting groove, and the adsorption magnets are embedded in the first cavity.

Preferably, one side of spout all is provided with fixed establishment, fixed establishment includes the second cavity, the second cavity has all been seted up to one side of spout, the inside fixed mounting that all has the spring of second cavity, the equal fixed mounting in one side of spring has spacing post, spacing hole has all been seted up to one side of slider.

Preferably, one side of the limiting column is inserted into the limiting hole, and the limiting column and the limiting hole are both arc-shaped.

Preferably, a ball is embedded into one side of the limiting column, and the ball is circular.

Compared with the prior art, the invention has the beneficial effects that:

1. through being provided with coupling mechanism and bearing frame, compare in main shaft pressure sensor or other pressure bearing sensor simple structure, the cost is lower, and welding effect is good, and it is many to have no constant pressure system welding tumor, and the overlap is big. The welding line is straight and has no flash or burr after constant pressure welding, follow-up tracking is realized in the welding process, the pressing amount of the shaft shoulder of the stirring tool is automatically controlled according to the pressure value fed back by a sensor, the surface of a workpiece is more attractive, welding flashes hardly exist, subsequent flash grinding process steps are reduced, personnel intervention is not needed in the whole welding process, unmanned operation is realized, a pressure limit range is set, the problem that the pressing amount of a stirring head is too large due to manual or misoperation is effectively solved, the protection effect on welding equipment is achieved, a constant pressure control system is integrated in an operation system, the system collects the welding pressure in real time according to a developed friction stir welding pressure collection facility, the pressing amount is corrected in real time, and the welding pressure is kept at a constant value. This constant pressure control system can be through maintaining the pressure value with friction stir welding in-process at the instruction value, no steady state error, and response speed is fast, and the overshoot is minimum, can effectively reduce the ageing lag problem, utilizes slider slidable mounting to the inside of spout simultaneously, can make things convenient for the staff to install the bearing frame.

2. Through being provided with fixed establishment, utilize spacing post to insert to the inside in spacing hole to can be with the firm inside of fixing at the spout of slider, thereby can prevent that gliding phenomenon from appearing in the spout, increased the fastness of structure, made things convenient for staff's use.

Drawings

FIG. 1 is a schematic sectional elevation view of the structure of the present invention;

FIG. 2 is a partial schematic view of the present invention;

FIG. 3 is a schematic top view of the structure of the present invention;

FIG. 4 is an enlarged view of a portion of the structure at A in FIG. 2 according to the present invention;

fig. 5 is an enlarged view of a portion of the structure at B in fig. 2 according to the present invention.

In the figure: 1. a device main body; 110. a screw rod; 111. an adjusting washer; 112. a flat ball bearing; 113. a strain gauge pressure sensor; 114. a bearing seat; 2. a connecting mechanism; 210. a connecting rod; 211. a slider; 212. a chute; 3. a heat insulation mechanism; 310. mounting grooves; 311. mounting blocks; 312. a heat insulation plate; 313. a first cavity; 314. adsorbing a magnet; 4. a fixing mechanism; 410. a second cavity; 411. a spring; 412. a limiting column; 413. a limiting hole; 414. and a ball.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, an embodiment of the present invention is shown:

a friction stir welding constant pressure structure device comprises a device body 1, the device body 1 comprises a screw rod 110, both sides of the screw rod 110 are fixedly provided with adjusting washers 111, the top end of each adjusting washer 111 is fixedly provided with a planar ball bearing 112, the top end of each planar ball bearing 112 is fixedly provided with a strain type pressure sensor 113, the top end of each strain type pressure sensor 113 is provided with a bearing seat 114, the bottom end of each bearing seat 114 is provided with a connecting mechanism 2, each connecting mechanism 2 comprises a connecting rod 210, both sides of the bottom end of each bearing seat 114 are fixedly provided with connecting rods 210, one sides of the two connecting rods 210 close to each other are fixedly provided with sliding blocks 211, both sides of each strain type pressure sensor 113 are provided with sliding grooves 212, the sliding blocks 211 are slidably arranged inside the sliding grooves 212, compared with a main shaft pressure sensor or other pressure bearing sensors, the structure is simple, the cost is lower, the welding effect is good, the welding of no constant pressure system has more accumulated tumors and large flash. The welding line is straight and has no flash or burr after constant pressure welding, follow-up tracking is realized in the welding process, the pressing amount of the shaft shoulder of the stirring tool is automatically controlled according to the pressure value fed back by a sensor, the surface of a workpiece is more attractive, welding flashes hardly exist, subsequent flash grinding process steps are reduced, personnel intervention is not needed in the whole welding process, unmanned operation is realized, a pressure limit range is set, the problem that the pressing amount of a stirring head is too large due to manual or misoperation is effectively solved, the protection effect on welding equipment is achieved, a constant pressure control system is integrated in an operation system, the system collects the welding pressure in real time according to a developed friction stir welding pressure collection facility, the pressing amount is corrected in real time, and the welding pressure is kept at a constant value. This constant pressure control system can be through maintaining the pressure value with friction stir welding in-process at the instruction value, no steady state error, and response speed is fast, and the overshoot is minimum, can effectively reduce the ageing lag problem, utilizes slider 211 slidable mounting to the inside of spout 212 simultaneously, can make things convenient for the staff to install bearing frame 114.

Further, the both sides of bearing frame 114 all are provided with thermal-insulated mechanism 3, thermal-insulated mechanism 3 includes mounting groove 310, mounting groove 310 has all been seted up to the both sides of bearing frame 114, and the quantity of every group mounting groove 310 is two, mounting block 311 is all inserted to install in mounting groove 310's inside, the equal fixed mounting in one side that both sides mounting block 311 kept away from each other has heat insulating board 312, utilize heat insulating board 312, can play thermal-insulated effect to bearing frame 114 both sides, thereby prevent that bearing frame 114 from receiving the damage because higher temperature, the life of bearing frame 114 has been prolonged.

Further, first cavity 313 has all been seted up to the one side that installation piece 311 and mounting groove 310 are close to each other, and adsorption magnet 314 is installed all to the inside embedding of first cavity 313, utilizes the adsorption effect that adsorption magnet 314 produced to can be with the firm fixing at mounting groove 310 of installation piece 311, increased the fastness of structure, prevented that installation piece 311 from dropping from the inside of mounting groove 310.

Further, one side of spout 212 all is provided with fixed establishment 4, fixed establishment 4 includes second cavity 410, second cavity 410 has all been seted up to one side of spout 212, the inside fixed mounting that all has spring 411 of second cavity 410, the inside fixed mounting that all has spacing post 412 of one side of spring 411, spacing hole 413 has all been seted up to one side of slider 211, the inside of installing to spacing hole 413 is inserted to one side of spacing post 412, and one side of spacing post 412 and spacing hole 413 all are the arc, utilize spacing post 412 to insert the inside to spacing hole 413, thereby can be with the firm inside of fixing at spout 212 of slider 211, thereby can prevent that gliding phenomenon from appearing in spout 212, the fastness of structure has further been increased, the use of staff has been made things convenient for.

Furthermore, the balls 414 are embedded in one side of the limiting column 412, and the balls 414 are circular in shape, so that when the limiting column 412 is extruded, the balls 414 roll, thereby reducing the friction force on the limiting column 412 and prolonging the service life of the limiting column 412.

The working principle is as follows: when the worker uses the device body 1, the bearing seat 114 needs to be installed, and the bearing seat 114 can be slid downward on the outer side of the screw rod 110, so that the slider 211 is slidably installed inside the sliding groove 212, and the installation of the bearing seat 114 can be completed.

When slider 211 slides to the inside bottom of spout 212, utilize spring 411's inertia to can play spacing post 412 to the inside of spacing hole 413, thereby with the firm inside of fixing at spout 212 of slider 211, the staff can insert the inside of installation piece 311 to mounting groove 310 simultaneously, thereby can install heat insulating board 312 to the both sides of bearing frame 114, play the thermal-insulated effect to bearing frame 114.

Meanwhile, a bearing seat 114 is added on the structure of the screw rod 110, the pressure applied to the stirring head in the welding process is transmitted to the bearing seat 114 through the screw rod 110, and the bearing seat 114 is added between the screw rod 110 and the strain type pressure sensor 113. The bearing seat 114 transmits the measured pressure to the system through analog quantity, and the system completes post-processing work to achieve the effect of constant-pressure welding of friction stir welding. For convenience of installation and adjustment, the adjusting washer 111 is designed to adjust the gap during assembly.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a friction stir welding constant pressure constructional device, includes device main part (1), its characterized in that: the device main body (1) comprises a screw rod (110), adjusting washers (111) are fixedly arranged on both sides of the screw rod (110), a plane ball bearing (112) is fixedly arranged at the top end of the adjusting washer (111), a strain type pressure sensor (113) is fixedly arranged at the top end of the plane ball bearing (112), a bearing seat (114) is arranged at the top end of the strain type pressure sensor (113), the bottom end of the bearing seat (114) is provided with a connecting mechanism (2), the connecting mechanism (2) comprises a connecting rod (210), connecting rods (210) are fixedly arranged on both sides of the bottom end of the bearing seat (114), sliding blocks (211) are fixedly arranged on the sides, close to each other, of the two connecting rods (210), sliding grooves (212) are formed in two sides of the strain type pressure sensor (113), and the sliding block (211) is installed inside the sliding grooves (212) in a sliding mode;

the heat insulation mechanism (3) is arranged on each of two sides of the bearing seat (114), each heat insulation mechanism (3) comprises a mounting groove (310), the mounting grooves (310) are formed in the two sides of the bearing seat (114), the number of the mounting grooves (310) in each group is two, mounting blocks (311) are inserted into the mounting grooves (310), and heat insulation plates (312) are fixedly mounted on the sides, far away from each other, of the mounting blocks (311) on the two sides;

a first cavity (313) is formed in one side, close to each other, of the mounting block (311) and the mounting groove (310), and an adsorption magnet (314) is embedded in the first cavity (313);

one side of each sliding groove (212) is provided with a fixing mechanism (4), each fixing mechanism (4) comprises a second cavity (410), one side of each sliding groove (212) is provided with the second cavity (410), the interior of each second cavity (410) is fixedly provided with a spring (411), one side of each spring (411) is fixedly provided with a limiting column (412), and one side of each sliding block (211) is provided with a limiting hole (413);

one side of the limiting column (412) is inserted into the limiting hole (413), and both one side of the limiting column (412) and the limiting hole (413) are arc-shaped;

the ball (414) is embedded and installed on one side of the limiting column (412), and the shape of the ball (414) is circular.