CN213729920U

CN213729920U - Jacking clamping rotating mechanism of welding system

Info

Publication number: CN213729920U
Application number: CN202021928090.8U
Authority: CN
Inventors: 董清; 周宗卓; 余其铭; 张立; 汪绪佳; 李伟
Original assignee: Hubei Hantai Intelligent Equipment Co ltd
Current assignee: Hubei Hantai Intelligent Equipment Co ltd
Priority date: 2019-08-06
Filing date: 2019-08-06
Publication date: 2021-07-20
Anticipated expiration: 2029-08-06
Also published as: CN211192495U; CN213729921U

Abstract

The utility model provides a tight rotary mechanism of jacking of welding system, the tight rotary mechanism of jacking is including unsteady joint, locating pin, rhombus round pin and anchor clamps drive joint, unsteady joint has unsteady joint spliced pole, unsteady joint spliced pole is used for butt joint, locking and fixes a position work piece holder's tray, the locating pin is used for the tray prepositioning with work piece holder, the rhombus round pin is used for the transmission moment of torsion, the anchor clamps drive joint can be connected with work piece holder's tight drive arrangement that presss from both sides to the tight work piece of drive clamp body removal clamp. The utility model discloses a jacking presss from both sides tight rotary mechanism can realize the jacking, press from both sides tightly, rotation function, can realize moreover with workpiece holder's reliable butt joint, the location is accurate, can also drive workpiece holder and press from both sides tight work piece and drive the work piece rotation.

Description

Jacking clamping rotating mechanism of welding system

The application is a divisional application of the Chinese utility model patent application with the name of "a welding system" and the patent number "201921261433.7".

Technical Field

The utility model relates to a laser welding field specifically relates to a tight rotary mechanism of jacking clamp of welding system.

Background

With the rapid development of industrial production and the continuous development of new materials, the requirements on the performance of welding structures are higher and higher compared with the traditional arc welding. Laser welding has the advantages of high energy density, deep penetration, high precision, strong adaptability, environmental protection and the like, and is widely applied to the technical fields of machinery, electronics, automobile manufacturing, aerospace and the like.

In the industries of machinery, automobile manufacturing and the like, complex disc or cylindrical parts, such as steel pistons, large-diameter forged gears, axles and other parts, are limited by processing conditions, the integral manufacturing has great difficulty, and the parts are connected by welding after being processed in a split mode. However, the tensile strength and fatigue strength of the welding seam are low by adopting the traditional electric arc welding, and a reliable nondestructive testing method is lacked. The laser welding has the advantages that the welding speed is high, the heat input is small, the influence area of a welding seam is small, the softening of the heat influence area is avoided, and the performance of a welding seam joint is equivalent to or superior to that of a base material; meanwhile, laser welding is less restricted by the space of the workpiece, and the adaptability is strong. Therefore, laser welding is becoming the main method for connecting and manufacturing workpieces such as pistons, gears and the like, and is widely applied in the technical fields of machinery, electronics, automobile manufacturing, aerospace and the like. However, the laser welding has high requirement on the positioning accuracy of the equipment, the welding rhythm is fast, and whether the tool fixture is designed in place directly influences the production efficiency and yield. The existing equipment and method can not meet the requirements of cylindrical and conical parts on efficiency, and have the defects of complex positioning, poor adaptability of the clamp and incapability of meeting the diversified requirements of the parts.

SUMMERY OF THE UTILITY MODEL

To the above defect or the improvement demand of prior art, the utility model aims at providing a welding system's work piece holder, jacking press from both sides tight rotary mechanism, welding system and welding method, fix a position accurate, select in a flexible way, efficient, the operation is reliable, degree of automation is high.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model provides a tight rotary mechanism of jacking of welding system which characterized in that, the tight rotary mechanism of jacking clamp includes that the joint that floats, locating pin and rhombus round pin, the joint that floats has the joint spliced pole that floats, the joint spliced pole that floats is used for butt joint, locking and fixes a position work piece holder's tray, the locating pin is used for prepositioning with work piece holder's tray, the rhombus round pin is used for the transmission moment of torsion.

Furthermore, the jacking clamping and rotating mechanism further comprises a clamp driving joint, and the clamp driving joint can be connected with a clamping driving device of the workpiece clamp so as to drive the clamp body to move to clamp the workpiece.

Further, the jacking clamping and rotating mechanism further comprises: the robot comprises a vertical moving device and a rotary driving device, wherein the vertical moving device is a single-shaft robot, and the rotary driving device is a motor.

Compared with the prior art, the beneficial effects of the utility model reside in at least:

the utility model discloses a work piece holder fixes a position accurately, selects in a flexible way, can adapt to the work piece of equidimension not. The utility model discloses a jacking presss from both sides tight rotary mechanism can realize the jacking, press from both sides tightly, rotation function, can realize moreover with workpiece holder's reliable butt joint, the location is accurate, can also drive workpiece holder and press from both sides tight work piece and drive the work piece rotation. The positioning adopts a modular structure, and all the procedures are coordinated and ordered. According to the characteristics of welding materials, a preheating procedure before welding can be added, the welding performance of the materials can be improved, and a cleaning procedure can be added, so that the welding quality can be ensured. The rotary worktable can be set to multiple stations, can adapt to welding processes with different rhythms, and can adapt to a welding period by setting the number of stations. The welding efficiency is high, the operation is reliable, the streamlined operation can be realized, and the automation degree is high.

Drawings

Fig. 1 is an overall schematic view of the welding system of the present invention.

Fig. 2 is the welding workbench schematic diagram inside the welding system of the present invention.

Fig. 3 is the structural schematic diagram of the rotary worktable of the welding system of the utility model.

Fig. 4 is a schematic structural view of the welding robot of the present invention.

Fig. 5 is a schematic structural view of the workpiece holder of the present invention.

Fig. 6 is the schematic view of the jacking clamping and rotating mechanism of the present invention.

Fig. 7 is a schematic view of a piston workpiece.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. The interpretation of such words should be made at the discretion of the person skilled in the art. For example, "above … …" and "below … …" are to be understood as referring to the positional relationship of the main structure or structures of the component or the like in the initial state, which may be broken during the movement. "… … is disposed on … …" should be understood to refer to the approximate connection of the components, not necessarily above. For the expression convenience, the utility model discloses the term "X axle", "R axle" and "Z axle" be virtual axle, "X axle" and "R axle" along the horizontal direction, "Z axle" along vertical direction, "X axle", "R axle" and "Z axle" two liang of mutually perpendicular, constitute rectangular coordinate system.

In the present invention, unless otherwise explicitly specified or limited, the terms "set", "mounted", "connected", "fixed", and the like are to be understood broadly from the perspective of a person skilled in the art of standing, and may be, for example, fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Fig. 1 is an overall schematic view of a welding system. Fig. 2 is a schematic view of a work table and a welding robot inside a welding system. Referring to fig. 1 and 2, the welding system includes a laser generator and power supply (not shown), a cooling system (not shown), a welding shielding gas station (not shown), an electrical control system 2, a pneumatic lubrication system 3, a whole frame and protection system 4, a rotary table 50, a welding robot 60, a work holder 70, and a jacking clamping rotation mechanism 80. The workpiece fixture 70 is arranged on the rotary workbench 50, when a workpiece rotates to a welding station, the jacking clamping rotating mechanism 80 moves upwards to penetrate through the rotary workbench 50 to be in butt joint with the workpiece fixture 70, the jacking clamping rotating mechanism 80 continues to move upwards and drives the workpiece fixture 70 to clamp the workpiece, the workpiece is lifted to a welding designated position, and the welding robot 60 welds the workpiece.

As shown in fig. 3, the rotary table 50 is mainly composed of a turntable 502, a dust cap 503, a shaft 504, a torque transmitter 505, a connecting disc 506, a support bearing 507, a mounting bracket 508, a gear 509, a bearing block 510, a speed reducer 511, a torque limiter 512, and a mounting base 513. The workholding fixture 70 is mounted on the turntable 502, and the speed reducer 512 is mounted on the mounting base 513, and the speed reducer can be driven by a motor, and transmits power to the gear 509 through the torque limiter 512. The gear is fixedly connected with the shaft 504, the lower end of the shaft 504 is rotatably mounted on a bearing seat 510 through a bearing, the upper end of the shaft 504 is connected with a connecting disc 506 through a torque transmitter 505, and the connecting disc 506 is fixedly connected with the turntable 502. A support bearing 507 is arranged below the connecting disc, the support bearing 507 is arranged between the mounting rack 508 and the connecting disc 506, and the connecting disc and the turntable are supported. The shaft 504 transfers power to the connection pad through the torque transmitter, driving the turntable to rotate. The top end of the shaft is also provided with a dust cover 503 which can effectively prevent impurities such as dust from entering the rotating shaft.

Specifically, the rotary table 50 further has a limit locking device 515 (see fig. 2). The rotary worktable is a multi-station rotary worktable and at least comprises a feeding station and a welding station. An external robot or a manual work loads a workpiece into a feeding station of the rotary workbench, the rotary workbench is driven by the speed reducer to rotate to reach a welding station, and meanwhile, the limiting locking device 515 of the workbench is started to lock the rotary workbench, so that accurate positioning is realized. After the corresponding process is completed, the limiting locking device 515 is unlocked, and the turntable is rotated to the next station. Specifically, the limiting locking device 515 includes a limiting block 5151, a lock catch 5152, and a lock hole 5153. When the turntable reaches a designated station, the limiting block 5151 limits the rotation of the turntable, and the lock catch 5152 is inserted into the lock hole 5153 to complete positioning and locking. When the corresponding process is finished, the lock catch is unlocked, the rotary workbench rotates, and the turntable rotates to the next station. The multi-station rotary exchange workbench is provided with a torque transmitter and a torque limiter, so that overload can be avoided.

As shown in fig. 2 and 4, the welding robot 60 includes a three-axis robot 601 movable at least along the X axis, along the Z axis, and rotating about the R axis, and a laser welding head 602. The welding robot 60 may be an X-axis mobile robot, a Z-axis mobile robot, or an R-axis rotary robot.

As shown in fig. 5, the work holder 70 includes a pallet 701, a work support base 702, a clamping and centering device, and a manual centering device. The clamping and centering device comprises a clamping driving device 703 and a clamp body 704. In the figure the workpiece 7 is a piston. The workpiece clamp further comprises a manual aligning device, the manual aligning device comprises a fixed seat 705 and an aligning nut 706, the fixed seat and the aligning nut are arranged around the clamping and centering device, and the aligning nut is arranged on the fixed seat and connected with the clamping and centering device. The tray 701 is placed on the rotary table 502 of the rotary workbench 50, the corresponding station on the rotary table 502 is provided with a tray positioning pin, the bottom of the tray 701 is provided with a positioning hole, the positioning hole of the tray corresponds to the tray positioning pin, the horizontal position of the tray is positioned, and the tray is prevented from shifting when the rotary workbench rotates.

Specifically, the supporting seat is disposed on the tray, the clamping driving device is disposed below the supporting seat, the clamp body is disposed above the supporting seat, the clamping driving device is connected to the clamp body through a connecting element, and the clamping driving device and the clamp body are fixedly connected through an L-shaped connecting frame 707 in this embodiment. The fixture body has an automatic centering structure. In this embodiment, the clamp body has symmetrical V-shaped openings arranged oppositely. The clamping driving device is provided with a connecting joint which is butted with a clamp driving joint (arranged on the jacking clamping rotating mechanism 80), the clamping driving device can be an air cylinder or a hydraulic cylinder, driving force (air pressure and hydraulic pressure) is provided through the clamp driving joint, and under the driving of the clamping driving device, the V-shaped clamps which are oppositely arranged are close to the middle, so that the cylindrical workpiece is automatically clamped and centered. The automatic centering device of the clamp body can be arranged according to the shape of the workpiece. If the workpiece is conical in shape, a corresponding conical surface opening may be provided. The manual aligning device comprises a fixed seat and an aligning nut, the fixed seat and the aligning nut are arranged around the clamping and centering device, and the aligning nut is arranged on the fixed seat and connected with the clamping and centering device. When the equipment is debugged, the position of the clamp is adjusted through the manual centering device. Specifically, the self-aligning nut is rotated to finely adjust the initial positions of the clamp driving device 703 and the clamp body 704.

As shown in fig. 6, the main structure of the jacking-clamping rotary mechanism 80 is disposed below the rotary table 50. Below the pallet of the work holder 70, a through hole is provided on the turntable 502 of the rotary table, through which the jacking clamping rotary mechanism 80 is butted against the pallet. The jacking clamping and rotating mechanism 80 mainly comprises a vertical moving device 802, a floating joint 803, a floating joint connecting column 8031, a clamp driving joint 804, a positioning pin 805, a supporting device 806, a rotating driving device 807, a hollow shaft 808, a rotating joint 809, a diamond pin 810 and a butt joint plate 811. The vertical moving device 802 drives the jacking clamping rotating mechanism 80 to move up and down. The floating joint 803 of the jacking clamping rotating mechanism is provided with a floating joint connecting column 8031, the tray is provided with a butt joint hole which is in butt joint with the floating joint connecting column 8031, and the floating joint 803 can realize the automatic centering of the workpiece clamp. The floating joint connection post 8031 interfaces and locks the pallet of the work holder. Two clamp driving joints 804 of the jacking clamping rotating mechanism are symmetrically arranged on the butt joint plate 811 and are respectively connected with the clamping driving device 703 of the workpiece clamp, so that the clamp body 704 is driven to move to clamp the workpiece. Two positioning pins 805 are provided on one side of the docking plate 811. The floating joint connecting column is used for pre-positioning the floating joint connecting column with a tray of a workpiece clamp, and prevents the floating joint and the workpiece clamp from being damaged due to the fact that butt joint cannot be achieved when errors are large. The diamond pins 810 are disposed on the opposite side from the two locating pins 805, and the diamond pins 810 and the two locating pins 805 are distributed around the floating joint connection column 8031. The floating joint 803, the clamp driving joint 804, the positioning pin 805, the diamond pin 810, the butt joint plate 811 and the like form a quick pallet clamping device, so that butt joint, clamping and quick butt joint separation of a workpiece clamp pallet are completed, and quick change is completed. Specifically, the vertical moving device 802 of the jacking clamping rotating mechanism is a single-axis robot, and the rotating driving device 807 is a motor. The rotation driving device 807 provides a rotation driving force for the jacking and clamping rotation mechanism 80 to drive the workpiece holder and the workpiece to rotate. The hollow hole of hollow shaft is used for threading and walk the pipe, and rotary joint is used for connecting trachea or hydraulic pressure pipe to when the mechanism is rotatory, the pipeline twists into a group, damages the pipeline. When the tray clamping and quick-changing device works, the jacking clamping rotating mechanism is started, the single-shaft robot ascends, and the tray clamping and quick-changing device is automatically butted with the workpiece clamp and locks the tray of the workpiece clamp. Specifically, the two positioning pins are pre-positioned with the tray of the workpiece fixture, the floating joint connecting column of the jacking clamping rotating mechanism is in butt joint with the butt joint hole of the workpiece fixture, and meanwhile, the tray of the workpiece fixture is positioned, clamped and locked to complete automatic centering. The diamond-shaped pins also complete the positioning with the pallet of the workholding fixture and transmit torque. The clamp driving joint of the jacking clamping rotating mechanism is also in butt joint with the workpiece clamp, and the clamping driving device of the workpiece clamp drives the clamp body to move to clamp the workpiece through air pressure or oil pressure. And the single-shaft robot is lifted to reach the specified welding position and is accurately positioned. The rotation driving device drives the workpiece clamp and the workpiece to rotate.

The operation of the welding system will be described in its entirety with reference to the welding of a split piston as an example.

As shown in FIG. 7, the piston 100 is comprised of two parts, including a piston crown 101 and a piston skirt 102. After the piston crown is assembled to the piston skirt, laser welding is performed on the crown 103 and the outer circumference 104, respectively, to form the piston as a whole.

An external robot or a worker loads the assembled workpiece into a feeding station of a rotary worktable, the rotary worktable is driven by a speed reducer to rotate to reach a welding station, and meanwhile, a limiting locking device of the worktable is started to lock the turntable, so that accurate positioning is realized.

And starting the jacking clamping rotating mechanism, lifting the single-shaft robot, automatically butting the tray clamping quick-change device with the workpiece clamp and locking the tray of the workpiece clamp, and automatically butting the clamp driving joint to prepare for providing power for a clamping driving device of the workpiece clamp, such as compressed air or hydraulic oil. The floating joint of the jacking clamping rotating mechanism can ensure that the workpiece clamp and the jacking clamping rotating mechanism can be reliably butted within 8 mm of deviation. The single-shaft robot continues to rise, so that the workpiece clamp is separated from the turntable, rises to reach the specified welding position and is accurately positioned.

The clamp driving joint provides power for the tightening driving device to drive the clamp body to clamp the workpiece and enable the workpiece to be automatically centered.

The X-axis robot and the Z-axis robot of the welding robot are started, the laser welding head is aligned to the top surface to be welded of the heated workpiece, the rotary driving device of the jacking clamping and rotating mechanism drives the workpiece to rotate for a circle, and meanwhile, the laser generator and the power supply are started to weld the top of the workpiece. And blowing protective gas to the welding seam while welding the workpiece. In the welding process, because the radial runout error requirement of the workpiece is very high, a manual centering device (used during equipment debugging) and a clamping centering device are arranged, the clamping centering device can be finely adjusted during equipment debugging through the manual centering device, then the clamping centering device can automatically center the workpiece, the workpiece can adapt to workpieces with different diameters, and the adaptability is high.

After the top surface of the workpiece is welded, an R-axis rotating robot, an X-axis robot and a Z-axis robot of the welding robot are started, a laser welding head is aligned to the circumferential surface of the workpiece to be welded, a rotary driving device of the jacking clamping rotating mechanism drives the workpiece to rotate for a circle, and meanwhile, a laser generator and a power supply are started to weld the outer circumference of the workpiece.

After welding, the laser welding robot and the jacking clamping rotating mechanism return, the tray clamping quick-changing device is separated from the workpiece fixture and returns, and then the next cycle is started.

The utility model discloses a welding method includes the step:

the workpiece enters a feeding station of the rotary workbench;

rotating a turntable of the rotary worktable to enable the workpiece to reach a welding station;

the jacking clamping rotating mechanism ascends, is butted with the workpiece clamp and locks the workpiece clamp;

the clamping driving device drives the clamp body to clamp the workpiece and enables the workpiece to be automatically centered;

the jacking clamping rotating mechanism drives the workpiece clamp to ascend to reach a designated position;

a rotary driving device of the jacking clamping rotating mechanism drives the workpiece to rotate;

and carrying out laser welding on the workpiece.

Specifically, the welding method further includes: when the jacking clamping rotating mechanism ascends to be in butt joint with the workpiece clamp and the workpiece clamp is locked, the clamp driving joint of the jacking clamping rotating mechanism is in butt joint with the workpiece clamp, the clamp driving joint provides power for the clamping driving device of the workpiece clamp, and the clamp body is driven to clamp the workpiece.

Specifically, the welding method further includes: positioning pins of the jacking clamping rotating mechanism and a tray of the workpiece clamp are pre-positioned; a floating joint connecting column of the jacking clamping rotating mechanism is butted with a butt joint hole of the workpiece clamp, and a tray of the workpiece clamp is positioned and locked; the diamond-shaped pins also complete the positioning with the pallet of the workholding fixture and transmit torque.

It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a tight rotary mechanism of jacking of welding system which characterized in that, the tight rotary mechanism of jacking clamp includes that the joint that floats, locating pin and rhombus round pin, the joint that floats has the joint spliced pole that floats, the joint spliced pole that floats is used for butt joint, locking and fixes a position work piece holder's tray, the locating pin is used for prepositioning with work piece holder's tray, the rhombus round pin is used for the transmission moment of torsion.

2. The jacking and clamping rotary mechanism of the welding system of claim 1, further comprising a clamp driving joint, wherein the clamp driving joint is connectable with a clamping driving device of the workpiece clamp so as to drive the clamp body to move to clamp the workpiece.

3. The jacking-clamping and rotating mechanism of a welding system of claim 1, further comprising: the robot comprises a vertical moving device and a rotary driving device, wherein the vertical moving device is a single-shaft robot, and the rotary driving device is a motor.