CN112171167A - Multi-station workbench and welding method - Google Patents

Abstract

The invention discloses a multi-station workbench and a welding method, and belongs to the field of welding tools. This multistation workstation includes: the workpiece and the station frame are detachably connected, so that the workpiece and the ground form a preset angle, the height of a field can be utilized, and the problem that the occupied area of the existing production line is too large is solved.

Description

Multi-station workbench and welding method

Technical Field

The invention belongs to the field of welding tools, and particularly relates to a multi-station workbench and a welding method.

Background

The working method of the existing production line is to place a workpiece on a workbench parallel to the ground for processing, and when a plate with a large area is processed, the working method only occupies the length and width area of the field, does not utilize the height of the field, and has the problem of large occupied area.

Disclosure of Invention

The purpose of the invention is as follows: a multi-station workbench and a welding method are provided to solve the problems in the prior art.

The technical scheme is as follows: a multi-station table comprising: and the workpiece and the station frame are detachably connected, and the station frame and the workpiece form a preset included angle with the ground.

In a further embodiment, the multi-station workbench further comprises at least two rotary table devices fixedly connected with the ground, the station frames are fixedly connected with the rotary table devices, the rotary table devices drive the station frames to rotate to preset positions, and the processed station frames are rotated to preset angles through the rotary table devices, so that the processed workpieces can be rotated to the preset positions for cooling.

In a further embodiment, the multi-station workbench further comprises at least one exhaust device positioned on one side of the station frame, which is far away from the rotary table device, the exhaust device exhausts air to the direction of the station frame, and the air circulation on the surface of the workpiece can be improved by exhausting air to the direction of the station frame through the exhaust device, so that the cooling speed of the workpiece is increased.

In a further embodiment, the exhaust device is fixedly installed at the bottom end of the rotary table device, the exhaust device exhausts air from the rotary table device to the direction of the station frame, when the exhaust device exhausts air from the rotary table device to the direction of the station frame, the phenomenon that air flow directly presses a molten pool and slag when welding accessories are added on the surface of a workpiece can be avoided, and the cooling speed of the workpiece can be improved on the premise of ensuring the formation and stability of a welding seam.

In a further embodiment, the multistation workstation still includes the liquid cooling device with station frame fixed connection, the liquid cooling device include with station frame fixed connection's condenser pipe, it has the coolant liquid to flow in the condenser pipe, cools off the station frame and the work piece of cooling station through the condenser pipe, can be in the formation of assurance welding seam and the cooling rate of further improvement work piece under the prerequisite of stability.

In a further embodiment, at least two condensation pipes are fixedly mounted on the station frame, the condensation pipe of the station frame positioned on the cooling station is communicated with the condensation pipe of the station frame positioned on the welding station, cooling liquid in the condensation pipe flows from the station frame of the cooling station to the station frame of the welding station, the cooling liquid conveys heat of the station frame of the cooling station to the station frame of the construction station, and the cooling liquid with heat storage capacity stronger than that of air conveys the heat of the station frame of the cooling station to the station frame of the construction station, so that the preheating efficiency of workpieces of the construction station can be improved.

In a further embodiment, the bottom end of the station frame is also fixedly provided with at least two limiting devices, and the workpiece is abutted and matched with the limiting devices.

In a further embodiment, the multistation workstation still includes with station frame fixed connection's four at least clamping device, each fixed mounting in top and the bottom of station frame has two at least clamping device, clamping device include with station frame fixed connection's support, with support fixed connection's power supply to and with power supply fixed connection's briquetting, power supply drive briquetting is to station frame direction displacement, work piece and briquetting butt cooperation, can exert the clamp force to the work piece through power supply drive briquetting to station frame direction displacement, prevents that the work piece from receiving inertia to drop.

The welding method based on the multi-station workbench comprises the following steps: the three station frames are respectively the station frame of the dismounting station, the station frame of the welding station and the station frame of the cooling station.

And S1, after at least one workpiece is arranged on the station frame of the dismounting station, the station frame of the dismounting station is rotated to the welding station by using the rotary table device, and then a worker or a welding robot carries out welding work on the workpiece on the station frame of the welding station.

And S2, after the welding work of the workpiece on the station frame of the welding station is finished, rotating the station frame of the welding station to a cooling station by using the rotary table device, and simultaneously rotating the station frame of the dismounting station to the welding station.

And S3, after the workpiece on the station frame of the cooling station is cooled for a preset time, rotating to the dismounting station and then replacing the workpiece on the station frame at the dismounting station.

And S4, in the cooling process of the workpiece, the welding work of the welding station is finished, the cooling time is less than the preset time, the station frame of the cooling station rotates to the dismounting station to continue cooling, and the workpiece on the station frame is replaced at the dismounting station after the total cooling time of the workpiece at the cooling station and the dismounting station exceeds the preset time.

And S5, exhausting the gas from the turntable device to the station frame by the gas exhausting device in the welding process.

And S6, in the welding process, the cooling liquid in the condensation pipe flows from the station frame of the cooling station to the station frame of the welding station, and the cooling liquid conveys the heat of the station frame of the cooling station to the station frame of the construction station.

Has the advantages that: the invention discloses a multi-station workbench and a welding method.

Drawings

Fig. 1 is an assembly schematic of the present invention.

Fig. 2 is a schematic view of the internal structure of the present invention.

Fig. 3 is a schematic view of the spacing device of the present invention.

Fig. 4 is a schematic view of the clamping device of the present invention.

Fig. 5 is a schematic view of the operating principle of the liquid cooling apparatus of the present invention.

FIG. 6 is a schematic partial cross-sectional view of a slew ring of the present invention.

The reference numerals shown in fig. 1 to 6 are: the device comprises a rotary table device 1, a station frame 2, a limiting device 3, a clamping device 4, an exhaust device 5, a liquid cooling device 6, a radiator 7, a base 11, a driving assembly 12, a frame 13, a mounting seat 31, a limiting block 32, an arc part 33, a support 41, a power source 42, a pressing block 43, a condensation pipe 61, a cylindrical shell 62, a rotary ring 63, a cold liquid cavity 64 and a hot liquid cavity 65.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.

The applicant finds that the existing production line has the working method that workpieces are placed on a workbench parallel to the ground to be machined during welding, and when a plate with a large area is machined, the working method only occupies the length and the width of the field, does not utilize the height of the field, and has the problem of large occupied area.

This multistation workstation includes: the device comprises a rotary table device 1, a station frame 2, a limiting device 3, a clamping device 4, an exhaust device 5, a liquid cooling device 6, a radiator 7, a base 11, a driving assembly 12, a frame 13, a mounting seat 31, a limiting block 32, an arc part 33, a support 41, a power source 42, a pressing block 43, a condensation pipe 61, a cylindrical shell 62, a rotary ring 63, a cold liquid cavity 64 and a hot liquid cavity 65.

The station frame 2 is fixedly connected with the ground, the workpiece is detachably connected with the station frame 2, and the station frame 2 and the workpiece form a preset included angle with the ground.

The working principle is as follows: through the detachable connection of the workpiece and the station frame 2, the workpiece and the ground are at a preset angle, the height of a field can be utilized, and the problem that the occupied area of the existing production line is too large is solved.

In a further embodiment, in the automatic production, due to the fact that the surface temperature of the workpiece is too high due to welding, the workpiece is cooled on a workbench for a preset time to be able to carry out the next process, and the problems of large occupied area and long working time exist.

In order to solve the problems, the multi-station workbench further comprises at least two station frames 1 fixedly connected with the ground, the station frames 2 are fixedly connected with the rotary table device 1, and the rotary table device 1 drives the station frames 2 to rotate to a preset position.

The processed station frame 2 is rotated to a preset angle through the turntable device 1, and the processed workpiece can be rotated to a preset position for cooling.

In a further embodiment, the stage apparatus comprises a base 11, a driving assembly 12 fixedly connected to the base 11, and a frame 13 fixedly connected to the driving assembly 12, the driving assembly 12 driving the frame 13 to rotate, wherein the driving assembly 12 is a servo motor or a stepping motor.

The working principle is as follows: in automatic production, because the welding leads to the work piece surface temperature too high, satisfying the condition of takt, set up four station frames 2, can modify the quantity of station frame 2 according to the takt, during operation place the work piece on station frame 2 by the robot tongs, the revolving stage rotates 90, wait that the tongs puts the work piece to the station once more, circulate in proper order, put the fan around the revolving stage, realize the natural wind cooling, the robot judges according to the cooling time, the work piece that the snatchs cooling time longest gets away gets into next process.

The workpiece is fixedly connected with the station frame 2, after the workpiece is welded on the station frame 2, the station frame 2 after being machined is rotated to a preset angle by the rotary table device 1, the machined workpiece is rotated to a preset position to be cooled, another workpiece is welded in the process of cooling the machined workpiece, the problems of large occupied area and long working time of the workpiece during cooling are solved, the station frame 2 and the workpiece form a preset included angle with the ground to be capable of utilizing the height direction of a field, and the problem of large occupied area of the workpiece during cooling is further solved.

The driving assembly 12 drives the frame 13 to rotate, so that the automation can be improved, and the labor intensity can be reduced.

In a further embodiment, the use of the turntable device 1 to rotate the station frame 2 to a predetermined position for natural cooling has a problem that the cooling time is excessively long.

In order to solve the problems, the multi-station workbench further comprises at least one air exhaust device 5 which is positioned on one side of the station frame 2 far away from the rotary table device 1, and the air exhaust device 5 exhausts air towards the station frame 2.

The exhaust device 5 exhausts air to the station frame 2 direction, so that the air circulation on the surface of the workpiece can be improved, and the cooling speed of the workpiece is increased.

In a further embodiment, venting from the outside to the station frame 2 tends to blow away the molten pool and slag, which is detrimental to weld formation and stability.

In order to solve the above problem, the air discharging device 5 is fixedly installed at the bottom end of the turntable device 1, and the air discharging device 5 discharges air from the turntable device 1 to the station frame 2.

The exhaust device 5 exhausts air from the rotary table device 1 to the station frame 2 direction, so that the phenomenon that air flow directly presses a molten pool and slag when welding accessories are added on the surface of a workpiece can be avoided, and the cooling speed of the workpiece can be improved on the premise of ensuring the formation and stability of a welding seam.

In a further embodiment, only increasing the air flow has the problem of low cooling efficiency due to poor air heat storage capacity, and when two workpieces are spliced and welded, the gas is exhausted from the turntable device 1 to the station frame 2, so that the molten pool and the slag are pressed, and the stability of the welding seam is reduced.

In order to solve the above problem, the multi-station workbench further comprises a liquid cooling device 6 fixedly connected with the station frame 2, the liquid cooling device 6 comprises a condensation pipe 61 fixedly connected with the station frame 2, cooling liquid flows in the condensation pipe 61, and the condensation pipe 61 is communicated with the radiator 7.

The cooling pipe 61 cools the station frame 2 of the cooling station and the workpiece, so that the cooling speed of the workpiece can be further improved on the premise of ensuring the formation and stability of a welding seam.

When two workpieces are spliced and welded, the cooling can be carried out by using the condensing pipe 61 only to ensure the formation and stability of the welding line.

When welding the attachment to the workpiece, the exhaust device 5 and the condensation duct 61 can be used together to increase the cooling rate.

In a further embodiment, the workpieces of the construction station are preheated in the welding process to obtain enough welding strength and stability, and the problem of low heat transfer efficiency caused by poor air heat storage capacity is solved although the heat on the machined workpieces can be transferred to the construction station only by increasing the air flow.

In order to solve the problems, at least two condensation pipes 61 are fixedly arranged on the station frame 2, the condensation pipe 61 of the station frame 2 positioned at the cooling station is communicated with the condensation pipe 61 of the station frame 2 positioned at the welding station, cooling liquid in the condensation pipe 61 flows from the station frame 2 of the cooling station to the station frame 2 of the welding station, and the cooling liquid conveys heat of the station frame 2 of the cooling station to the station frame 2 of the construction station.

The heat of the station frame 2 of the cooling station is conveyed to the direction of the station frame 2 of the construction station through the cooling liquid with the heat storage capacity stronger than that of air, so that the preheating efficiency of the workpiece of the construction station can be increased.

In a further embodiment, when the connection between the condensation pipe 61 and the heat sink 7 in the conventional connection method is rotated, the pipeline cannot freely rotate along with the turntable device 1, and the turntable device 1 needs to be reset after rotating for one circle, which causes a problem of complex operation.

In order to solve the above problem, the multi-station workbench further comprises a rotary liquid-changing device fixedly connected with the turntable device 1, the rotary liquid-changing device comprises a cylindrical shell 62 fixedly connected with the turntable device 1, and a rotary ring 63 sleeved outside the cylindrical shell 62, the rotary ring 63 is hermetically connected with the cylindrical shell 62, the station frame 2 is fixedly connected with the rotary ring 63, the cylindrical shell 62 comprises a cold liquid cavity 64 communicated with the liquid outlet end of the radiator 7 and a hot liquid cavity 65 communicated with the liquid inlet end of the radiator 7, a liquid outlet communicated with the cold liquid cavity 64 and a liquid return port communicated with the hot liquid cavity 65 are formed in the outer side of the cylindrical shell 62, the liquid outlet of the cylindrical shell 62 is communicated with a liquid inlet of the condensation pipe 61 of the station frame 2 of the cooling station, and the liquid return port of the cylindrical shell 62 is communicated with a liquid outlet of the condensation pipe 61 of the station frame 2 of the welding station.

When the rotary table device 1 works, the station frame 2 and the rotary ring 63 are driven to rotate for a preset angle around the central axis of the cylindrical shell 62, so that the condensing pipe 61 of the station frame 2 of the original welding station replaces the condensing pipe 61 of the station frame 2 of the cooling station to be communicated with the liquid outlet of the cylindrical shell 62.

The swivel ring 63 seals the liquid outlet and the liquid return opening of the cylindrical housing 62 when the turntable device 1 is in operation.

In a further embodiment, the condenser pipes 61 of two adjacent station frames 2 are communicated through a one-way valve, so that the cooling liquid is prevented from flowing back to the cooling station.

Through the cooperation of the revolving ring 63 and the cylindrical shell 62 of the rotary liquid changing device, the rotary table device 1, the condensation pipe 61 and the station frame 2 can be rotated at any angle, and the cooling liquid can be circulated only when the rotary table device 1 rotates to a preset angle.

In further embodiment, still fixed mounting has two at least stop device 3 in the bottom of station frame 2, and the work piece cooperates with the 3 butt of stop device, stop device 3 include with station frame 2 fixed connection's mount pad 31 to and with mount pad 31 fixed connection's stopper 32, the work piece cooperates with stopper 32 butt.

In a further embodiment, one end, close to the workpiece, of the limiting block 32 is fixedly provided with an arc portion 33, and the limiting block 32 is made to be arc-shaped, so that the workpiece is ensured to slide downwards due to gravity, and the workpiece is not easy to rub when the workpiece is grabbed by a manipulator.

In a further embodiment, the workpiece can be restrained by the abutting engagement of the restraining device 3 with the workpiece, but the workpiece is easily dropped by inertia when the turntable is rotated.

In order to solve the above problems, the multi-station workbench further comprises at least four clamping devices 4 fixedly connected with the station frame 2, at least two clamping devices 4 are respectively and fixedly installed at the top end and the bottom end of the station frame 2, each clamping device 4 comprises a support 41 fixedly connected with the station frame 2, a power source 42 fixedly connected with the support 41, and a pressing block 43 fixedly connected with the power source 42, the power source 42 drives the pressing block 43 to move towards the station frame 2, the workpiece is abutted and matched with the pressing block 43,

in a further embodiment, the power source 42 is a pneumatic arm, and the pressing block 43 is screwed to the pneumatic arm, and the pneumatic arm drives the pressing block 43 to rotate to apply a clamping force to the workpiece.

The power source 42 may also be a linear motion mechanism such as a screw mechanism, an air cylinder or a hydraulic cylinder, and drives the pressing block 43 to perform a linear motion in the direction of the workpiece, so as to apply a clamping force to the workpiece.

Through the rotation of pressure arm, realize pressing from both sides tightly the work piece, carry out spacingly to the work piece, ensure the state of putting of work piece.

The welding method based on the multi-station workbench comprises the following steps: at least three station frames 2 fixedly connected with the rotary table device 1, wherein the station frames 2 are distributed around the circumference of the central shaft of the rotary table device 1, and the three station frames 2 are respectively the station frame 2 of the dismounting station, the station frame 2 of the welding station and the station frame 2 of the cooling station.

And S1, after at least one workpiece is arranged on the station frame 2 of the dismounting station, the station frame 2 of the dismounting station is rotated to a welding station by using the rotary table device 1, and then a worker or a welding robot carries out welding work on the workpiece on the station frame 2 of the welding station.

And S2, after the welding work of the workpiece on the station frame 2 of the welding station is finished, rotating the station frame 2 of the welding station to a cooling station by using the rotary table device 1, and simultaneously rotating the station frame 2 of the dismounting station to the welding station.

And S3, after the workpiece on the station frame 2 of the cooling station is cooled for a preset time, rotating to the dismounting station and then replacing the workpiece on the station frame 2 at the dismounting station.

And S4, in the process of cooling the workpiece, the welding work of the welding station is finished, the cooling time is less than the preset time, the station frame 2 of the cooling station rotates to the dismounting station to continue cooling, the total cooling time of the workpiece at the cooling station and the dismounting station exceeds the preset time, the workpiece on the station frame 2 is replaced at the dismounting station, and when the total cooling time of the workpiece at the cooling station and the dismounting station does not exceed the preset time, the rotary table device and the welding robot stop the welding work to wait for the cooling time and inform the worker to mount the station frame.

S5, during the welding process, the air discharging device 5 discharges air from the turntable device 1 toward the station frame 2.

And S6, in the welding process, the cooling liquid in the condensation pipe 61 flows from the station frame 2 of the cooling station to the station frame 2 of the welding station, and the cooling liquid conveys the heat of the station frame 2 of the cooling station to the station frame 2 of the construction station.

In a further embodiment, the rotary table device 1, at least two station frames 2 arranged along the circumferential direction of the rotary table device 1, and a workpiece positioning portion provided on the station frames 2 for fixing a workpiece.

The station frame 2 extends from the bottom end of the turntable device 1 to the top end, and the extending direction of the station frame 2 and the extending direction of the center line of the turntable device 1 have a predetermined angle.

In the working state, the station frame 2 can rotate along the central line of the turntable device 1 by a preset angle.

The workpiece positioning part comprises at least two limiting devices 3 fixedly connected with the bottom end of the station frame 2.

The workpiece positioning portion further comprises at least four clamping devices 4 fixedly connected with the station frame 2.

The station frame 2 extends from the bottom end of the rotary table device 1 to the top end direction, a preset angle exists between the extending direction of the station frame 2 and the extending direction of the central line of the rotary table device 1, the height direction of a field can be utilized, and the problem that the occupied area of a workpiece is large in cooling is further solved.

In a further embodiment, in the above-mentioned manner of rotating the central shaft, if the weight of the workpiece on the station frame 2 is asymmetric or the driving assembly vibrates during operation, the coordinate point of the workpiece on the station frame may be shifted, which may cause an inaccurate positioning of the welding coordinate point.

In order to solve the above problem, the turntable device 1 is provided with an annular rail, the station frame 2 is matched with the annular rail, and the station frame is driven by the driving assembly to rotate for a preset angle along the central line of the turntable device.

The turntable device 1 may be used as a base on which an endless track is provided. Different from the mode of rotating through the central shaft, the rotation can be realized by arranging a circumferential rotating mechanism. The driving component is fixedly connected with the workpiece frame 2, and the driving component is an electric motor such as a servo motor or a stepping motor.

The drive assembly drives the workpiece frame 2 to rotate about the central axis. For example, at least one annular slide rail can be arranged at the bottom, the top, the middle or the like, the frame is pushed by the driving assembly to rotate along the slide rail by a preset angle, and different station frames are fixedly connected.

Can also provide the holding power for the station frame through the circular orbit, solve if work piece weight asymmetry on the station frame, or when producing the vibration in the drive assembly working process, all can make work piece coordinate point appear the skew on the station frame, cause the inaccurate problem of welding coordinate point location. The welding precision and the bearing capacity of the station frame are improved.

In a further embodiment, the workstation frames are rotated k x (360/N) each time, where N is the number of workstation frames and k is a natural number.

Claims (9)

1. A multi-station table, comprising: and the workpiece and the station frame are detachably connected, and the station frame and the workpiece form a preset included angle with the ground.

2. A multi-station workbench according to claim 1, further comprising at least two turret means fixedly connected to the ground, said at least two station frames being fixedly connected to said turret means, said turret means driving said at least two station frames to rotate to a predetermined position.

3. A multi-station table according to claim 2, further comprising at least one air exhaust means located on a side of the station frame remote from the turret means, said air exhaust means exhausting air towards the station frame.

4. A multi-station table according to claim 3, wherein said air exhaust means is fixedly mounted to the lower end of the turret means, said air exhaust means exhausting air from the turret means towards the station frame.

5. A multi-station workbench according to claim 1, further comprising a liquid cooling device fixedly connected to the station frame, wherein the liquid cooling device comprises a condenser tube fixedly connected to the station frame, and a cooling liquid flows in the condenser tube.

6. A multi-station workbench according to claim 1, wherein at least two condensation pipes are fixedly arranged on the station frame, the condensation pipe of the station frame at the cooling station is communicated with the condensation pipe of the station frame at the welding station, the cooling liquid in the condensation pipe flows from the station frame at the cooling station to the station frame at the welding station, and the cooling liquid conveys the heat of the station frame at the cooling station to the station frame at the construction station.

7. A multi-station workbench according to claim 1, wherein at least two limiting devices are fixedly mounted at the bottom end of the station frame, and the workpiece is in abutting fit with the limiting devices.

8. A multi-station workbench according to claim 1, further comprising at least four clamping devices fixedly connected with the station frame, wherein at least two clamping devices are fixedly mounted at each of the top end and the bottom end of the station frame, each clamping device comprises a support fixedly connected with the station frame, a power source fixedly connected with the support, and a pressing block fixedly connected with the power source, the power source drives the pressing block to move towards the station frame, and the workpiece is abutted and matched with the pressing block.

9. The welding method of the multi-station workbench according to any one of claims 4 to 8, comprising: the three station frames are respectively a station frame of a dismounting station, a station frame of a welding station and a station frame of a cooling station;

s1, after at least one workpiece is installed on the station frame of the dismounting station, the station frame of the dismounting station is rotated to a welding station by using a rotary table device, and then a worker or a welding robot carries out welding work on the workpiece on the station frame of the welding station;

s2, after the welding work of the workpiece on the station frame of the welding station is completed, the station frame of the welding station is rotated to a cooling station by using a rotary table device, and meanwhile, the station frame of the dismounting station is rotated to the welding station;

s3, after the workpiece on the station frame of the cooling station is cooled for a preset time, rotating to the disassembling and assembling station and then replacing the workpiece on the station frame at the disassembling and assembling station;

s4, in the cooling process of the workpiece, the welding work of the welding station is finished, the cooling time is less than the preset time, the station frame of the cooling station rotates to the dismounting station to continue cooling, and the workpiece on the station frame is replaced at the dismounting station after the total cooling time of the workpiece at the cooling station and the dismounting station exceeds the preset time;

s5, in the welding process, the exhaust device exhausts air from the turntable device to the direction of the station frame;

and S6, in the welding process, the cooling liquid in the condensation pipe flows from the station frame of the cooling station to the station frame of the welding station, and the cooling liquid conveys the heat of the station frame of the cooling station to the station frame of the construction station.

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