CN109848511B

CN109848511B - Express cabinet welding process and welding production line

Info

Publication number: CN109848511B
Application number: CN201910070746.2A
Authority: CN
Inventors: 刘连成
Original assignee: Qingdao Yufang Robot Industry Co ltd
Current assignee: Qingdao Yufang Robot Industry Co ltd
Priority date: 2019-01-25
Filing date: 2019-01-25
Publication date: 2023-10-24
Anticipated expiration: 2039-01-25
Also published as: CN109848511A

Abstract

The invention discloses a welding process of an express cabinet, which relates to the technical field of express cabinet manufacturing, and the technical scheme is that the welding process comprises the steps of welding left and right partition plate sub-assemblies; welding keel partition plate sub-assemblies; welding an inner framework assembly; welding an outer frame; repair welding is carried out on the finished product of the previous working procedure; and performing gas-shielded arc welding repair welding on the repair welded finished product. The beneficial effects of the invention are as follows: the scheme provides a production process of an express cabinet and a corresponding production line, and mainly aims at the operation of a spot welding robot which is used as repair welding. The use of the spot welding robot saves energy better while releasing manual work. The technical blank that the spot welding robot is not used in the express cabinet generation process is filled.

Description

Express cabinet welding process and welding production line

Technical Field

The invention relates to the technical field of express cabinet manufacturing, in particular to an express cabinet welding process and a welding production line.

Background

With the wide application of electronic commerce, the business volume of the express industry reaches a new hot tide. However, the problem that the express delivery person needs to repeatedly deliver the express delivery person because the user is not at the receiving address also occurs, and as a solution to the problem, the user can conveniently obtain the articles of the express delivery as soon as possible, the delivery pressure of the express delivery person is relieved, and the express delivery cabinet is gradually distributed in each area.

However, for the production of express cabinets, no corresponding molding production line and spot welding production process exist at present.

Disclosure of Invention

In order to achieve the above-mentioned aim, the invention provides a express cabinet welding process aiming at the above-mentioned technical problems.

The technical scheme is that the express cabinet welding process comprises the following steps:

s1, welding parts of left and right baffle sub-assemblies: welding the middle partition plates vertically arranged in the middle of the express cabinet with the grid bottom plates one by using a welding robot of the first working procedure station; the middle partition plate comprises a left electromagnetic lock fixing plate and a right electromagnetic lock fixing plate which are symmetrically attached, and the grid bottom plate comprises a plurality of left grid bottom plates and right grid bottom plates;

the Zuo Gekou bottom plate is welded on one side of the electromagnetic lock left fixing plate to form a left partition plate sub-assembly welding piece, and the right grid bottom plate is welded on one side of the electromagnetic lock right fixing plate to form a right partition plate sub-assembly welding piece;

when the plate is positioned, a workpiece is manually taken, two fixing plates are inserted into process positioning holes, fixing blocks at two sides clamp the fixing plates, a cylinder clamping unit drives positioning pins to move and insert into fixing plate rivet holes to position, a manual feeding part inserts rivet holes corresponding to the grid bottom plates into the positioning pins, and welded left and right partition plate sub-assembly welding parts are conveyed to the next station;

s2, welding a keel partition plate sub-assembly: respectively splicing the welding pieces of the left and right partition plate sub-assemblies welded in the S1 on two sides of a keel welding piece positioned in the middle, splicing the rear partition plate to the rear side of the keel welding piece, and welding the splicing parts; conveying the welded keel partition plate sub-assembly to a next station;

s3, welding an inner framework assembly: respectively splicing the top plate, the base and the back plate of the cabinet body by the keel partition plate sub-assembly welded in the S2, and respectively welding the joint parts of the top plate, the base and the back plate; and conveying the completed inner frame assembly to a next station;

s4, welding an outer frame: splicing a top cover with a water guide groove on a top plate of the inner framework assembly welded in the step S3, respectively splicing left and right side plates on the symmetrical outer sides of the top cover, the bottom plate and the grid bottom plate, and respectively welding each combination; and transporting the finished part to the next station;

s5, repair welding is carried out on the finished product of the S4, and the joint edges of the left side plate and the right side plate which are not welded in the S4 and the Zuo Ge port bottom plate and the right grid port bottom plate and the joint edge positions of the left side plate and the right side plate and the back plate are repair welded;

s6, performing gas-shielded arc repair welding on the finished product of the step S5; the butt-welding device comprises a top cover, a top plate and a back plate, wherein the top cover is provided with a water guide groove at the top part of the butt-welding device, the butt-welding base is provided with a bottom plate, the butt-welding base is provided with a side plate and the water guide groove are provided with a butt-welding side plate, the butt-welding fixing plate is provided with a side plate lap joint part, and the butt-welding fixing plate is provided with a cross intersection position.

Preferably, in the step S1, the front sides of the Zuo Ge port bottom plate and the right port bottom plate, that is, the sides facing the front and the outer sides of the cabinet body are flush with the front end surfaces of the left electromagnetic lock fixing plate and the right electromagnetic lock fixing plate;

and each part of the grid bottom plate facing the outer side of the cabinet body is in spot welding with the left electromagnetic lock fixing plate and the right electromagnetic lock fixing plate.

Preferably, the specific step of S2 is that the left and right partition sub-assembly welding pieces are clamped by corresponding tools, the partition is manually spliced to the rear side of the keel welding pieces, the middle partition is inserted into a gap formed between the left and right grid bottom plates of the left and right partition sub-assembly welding pieces, the positioning pins are manually pushed to position each part, the keel welding pieces are manually inserted into the square hole type positioning pins on two sides of the tools, the keel welding pieces are positioned between the left and right fixing plates, and the middle partition, the keel welding pieces and the left and right partition sub-assembly welding pieces are spliced and clamped by the clamping of the tools, so that each spliced part is respectively welded.

Preferably, in the step S1, corresponding tool clamps are used for clamping the middle partition plate and the grid bottom plate, the tool clamps are combined with holes in the middle partition plate and the grid bottom plate in a pin positioning mode, and the clamping parts of the tool clamps are provided with electromagnets. Because as the express delivery cabinet, the baffle is comparatively more, and the board is high and thin, be 45 when last piece the angle and go up the piece, consequently use the pin location to add magnet supplementary assurance to go up the stability of piece through using the hole on the baffle of middle board.

Preferably, a sensor for detecting whether a workpiece is clamped or not is arranged at the clamping end of the tool clamp. The sensor is a proximity switch.

Preferably, in the step S3, the grid bottom plate is clamped and stabilized by a guide block corresponding to the position of the grid bottom plate, and one side of the guide block, which faces the grid bottom plate, is designed in a horn mouth shape.

Preferably, each step comprises a splicing station and a welding station, the splicing station and the welding station are switched through a positioner, a welding robot is used for welding at the welding station, and material conversion is carried out between each two steps through a carrying robot;

the spot welding and carrying process uses an IRB-6700 spot welding/carrying robot, and the arc welding process uses an IRB-2600 arc welding robot.

S1-S5 are all spot welding robot spot welding operations, and S6 is arc welding robot arc welding operations.

Preferably, the dimension length width height of the express cabinet welded by the process is as follows: 2132mm,898mm, 178 mm, and about 120kg; the movable end of the carrying robot is connected with the gripping apparatus, the gripping apparatus is arranged corresponding to the express cabinet, a connecting table is arranged between the gripping apparatus and the robot, one end of the connecting table is fixedly connected with the gripping apparatus, the other end of the connecting table is an inclined table surface, the inclined table surface is a round surface, the movable end of the carrying robot is eccentrically arranged with the inclined table surface, and the eccentric distance is 200mm.

The size of the express cabinet exceeds two meters, the clamp and the middle turntable are very limited in the arm exhibition and the load of the IRB-6700 spot welding/carrying robot, and therefore the load and the accessibility can be met by adopting an eccentric installation mode of the gripping apparatus. In addition, from the position of the welding spot, the welding gun types are SRTX-2C7636-LX4, SRTC-2C5776LX2, SRTC-2C5777LX2 and SRTX-2C7635-LX5.

The express cabinet welding production line comprises a logistics channel penetrating through the whole production line, and a plurality of working procedure stations arranged on one side of the logistics channel, wherein a transfer robot is arranged between each working procedure station, and finished products of each working procedure are transferred through the transfer robot;

each working procedure station comprises a feeding station, a position changing machine and a welding station which are sequentially arranged; the feeding station is close to the logistics channel, the welding station is far away from the logistics channel, and the position changer is arranged between the welding station and the feeding station;

the feeding station is communicated with the logistics channel, and the feeding station is provided with a sensor for sensing whether staff exists.

Preferably, the positioner is a triaxial positioner.

Preferably, the process stations are sequentially arranged along the logistics channel, a finished product outlet is arranged at one side of the process station at the tail end, the welding stations of the first five process stations comprise two electric welding robots, and the welding station of the sixth process station is provided with a plurality of arc welding robots;

and a grinding device is arranged at one side of each spot welding robot, and a gun cleaner is arranged at one side of each arc welding robot.

Preferably, the spot welding robot and the transfer robot are IRB-6700 spot welding/transfer robots, and the arc welding robot is an IRB-2600 arc welding robot.

Preferably, all stations correspondingly use tool clamps corresponding to the workpieces, and the clamping ends of the tool clamps are provided with electromagnets.

The technical scheme provided by the embodiment of the invention has the beneficial effects that: the scheme provides a production process of an express cabinet and a corresponding production line, the types of the express cabinet which can be produced comprise self-lifting cabinets, nest-enlarging cabinets and the like, the spot welding robot is mainly operated, and the arc welding robot is used as repair welding. The use of the spot welding robot saves energy better while releasing manual work. The technical blank that the spot welding robot is not used in the express cabinet generation process is filled.

Drawings

Fig. 1 is a schematic overall structure of embodiment 2 of the present invention.

Fig. 2 is an enlarged view of a part of the first process of fig. 1.

Fig. 3 is an enlarged view of a portion of the last process of fig. 1.

FIG. 4 is a schematic diagram of a 2C7636-LX4 welding gun according to an embodiment of the invention.

Fig. 5 is a top view of fig. 4.

Fig. 6 is a right side view of fig. 4.

FIG. 7 is a schematic diagram of a 2C5777-LX2 welding gun according to an embodiment of the invention.

Fig. 8 is a top view of fig. 7.

Fig. 9 is a right side view of fig. 7.

FIG. 10 is a schematic diagram of a 2C7635-LX5 welding gun according to an embodiment of the invention.

Fig. 11 is a top view of fig. 10.

Fig. 12 is a right side view of fig. 10.

FIG. 13 is a schematic diagram of a 2C5776-LX2 welding gun according to an embodiment of the present invention.

Fig. 14 is a top view of fig. 13.

Fig. 15 is a right side view of fig. 13.

Wherein, the reference numerals are as follows: 41. 2C7636-LX4 static arm; 42. 2C7636-LX4 telescopic cylinder; 43. 2C7636-LX4 boom; 51. 2C5777-LX2 static arm; 52. 2C5777-LX2 telescopic cylinder; 53. 2C5777-LX2 boom; 61. 2C7635-LX5 static arm; 62. 2C7635-LX5 telescopic cylinder; 63. 2C7635-LX5 boom; 71. 2C5776-LX2 static arm; 72. 2C5776-LX2 telescopic cylinder; 73. 2C5776-LX2 boom.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. Of course, the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.

In the description of the invention, it should be understood that the terms "center," "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships that are based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the invention and simplify the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art in a specific case.

Example 1

The invention provides a welding process of an express cabinet, which comprises the following steps:

s1, welding parts of left and right baffle sub-assemblies: welding the middle partition plates and the grid bottom plates which are vertically arranged in the middle of the express cabinet one by using a welding robot A of a first working procedure station; the middle partition plate comprises a left electromagnetic lock fixing plate and a right electromagnetic lock fixing plate which are symmetrically attached, and the grid bottom plate comprises a plurality of left grid bottom plates and right grid bottom plates;

welding a left grid port bottom plate on one side of a left fixed plate of the electromagnetic lock, and welding a right grid port bottom plate on one side of a right fixed plate of the electromagnetic lock; the front side surfaces of the left grid opening bottom plate and the right grid opening bottom plate are flush with the front end surfaces of the left electromagnetic lock fixing plate and the right electromagnetic lock fixing plate;

the part of each grid bottom plate facing the outer side of the cabinet body is spot-welded with the left electromagnetic lock fixing plate and the right electromagnetic lock fixing plate;

in S1, corresponding fixture clamps are adopted for the middle partition plate, the grid bottom plate and the clamping, the fixture clamps are combined with holes in the middle partition plate and the grid bottom plate in a pin positioning mode, and an electromagnet is arranged at the clamping part of the fixture clamps. Because as the express delivery cabinet, the baffle is comparatively more, and the board is high and thin, be 45 when last piece the angle and go up the piece, consequently use the pin location to add magnet supplementary assurance to go up the stability of piece through using the hole on the baffle of middle board.

The process comprises the steps that firstly, the tooling of the S1 is turned to a 45-degree feeding position, all electromagnets are electrified at the moment, positioning pins of a fixed plate are ejected out, the tooling manually enters a feeding area, process pin holes of left and right fixed plates of an electromagnetic lock are inserted into corresponding positioning pins, and two ends of the tooling are pushed into auxiliary clamping mechanisms; then manually pressing a movable pin button of the fixed plate, inserting positioning pins of each positioning pin unit into corresponding rivet holes of the left and right fixed plates of the electromagnetic lock, and manually feeding a piece to insert rivet holes of the bottom plates of all the grid openings into the positioning pin holes; then people withdraw from the loading area, a starting button is shot down, and the tooling side pushes to clamp the left and right fixing plates of the electromagnetic lock with the bottom plates of all the grid openings; and (3) leveling the tool, transferring the tool into a welding area, and welding by a welding robot.

Each shaft of the triaxial positioner has a zero point defined by the user, in general, the position facing the manual loading is a zero point of one shaft, then when the product on the fixture is in a horizontal placement state, the product is a zero point of two triaxial, namely 0 degrees, 45 degrees and 45 degrees are angles relative to the horizontal position, and the product is turned more or less.

After the welding is finished, the step S2 is carried out, and the welded left and right partition plate sub-assembly welding pieces are conveyed to the next station;

s2, welding a keel partition plate sub-assembly: the welding pieces of the left and right baffle sub-assemblies on the left and right sides, which are welded in the S1, are respectively spliced on two sides of a keel welding piece positioned in the middle, and a rear baffle is spliced on the rear side of the keel welding piece and is used for welding each spliced part; conveying the welded keel partition plate sub-assembly to a next station;

s2, the electromagnetic lock left fixing plate and the electromagnetic lock right fixing plate welded in the S1 are placed on an S2 tool in a grabbing mode; the tooling clamps the left and right partition plate sub-assembly welding parts on the left and right sides, which are placed, and a person enters a part feeding area, manually feeds the rear partition plate, and manually pushes the positioning pin for positioning; manually inserting the keel welding pieces into square hole type positioning pins at two sides of the tool, manually pushing the positioning pins at two sides into positioning holes of left and right fixing plates of the electromagnetic lock; the person withdraws to take the start button down, the fixture clamps, and the welding pieces of the keel welding pieces, the rear partition plates and the left and right partition plate sub-assembly welded by the S1 are positioned and clamped; s2, turning the tool to 45 degrees, enabling a person to enter into the inspection and arrangement of the positions of the cross intersections of the keels and the grid bottom plate, removing the upper part area after the inspection and arrangement, shooting a start button, turning the tool flat and turning the tool into a welding area to weld the rear side of the middle keels and the front side of the grid thick partition plate, and respectively welding all the spliced positions;

after the completion, turning to step S3, and conveying the welded keel partition plate sub-assembly to a next station;

s3, welding an inner framework assembly: respectively splicing the top plate, the base and the back plate of the cabinet body by the keel partition plate sub-assembly welded in the S2, and respectively welding the joint parts of the top plate, the base and the back plate;

s3, the S2 area grabbing and placing robot grabs the keel partition plate sub-assembly piece welded by the S2 area grabbing and placing robot, moves the keel partition plate sub-assembly piece to a backboard workpiece placing table, and shoots and grabs the backboard under visual guidance; then putting the welded parts of the back plate and the keel partition sub-assembly together on an S3 tool, and discharging air by a tool swing arm positioning pin unit; manually entering a loading area, manually inserting a locating pin into place, withdrawing, then beating a starting button, loading air on a fixture, clamping, laterally pushing, inserting and clamping the joint edge position of a baffle plate and a rear back plate, and turning the fixture to a 45-degree loading position; then the manual upper part is inserted into the top plate and the base to a preset position and is pre-clamped; the starting button is shot down, the top plate is clamped with the base, the starting button is shot down again after the position of the base of the top plate is manually welded, and the tool is turned flat and is turned to a welding area for welding.

S4, after finishing, entering into a step, and conveying the finished inner frame assembly to a next station;

s4, welding an outer frame: splicing a top cover with a water guide groove on the top cover of the inner frame assembly welded in the step S3, symmetrically splicing side plates on the outer sides of the top cover, the bottom plate and the grid bottom plate, and respectively welding all the joints;

s4, specifically, grabbing and placing the inner framework assembly welded in the S3 to an S4 tool, and manually installing the left side plate of the cabinet body; then take start button, the outside presss from both sides tight left side board, and the frock is turned to 70 and goes up a position, and the manual work goes up a position again and puts into cabinet body right side board, inserts curb plate and top cap in to the exact position again with the guiding gutter, and the people withdraws to take start button down, and the frock is all pressed from both sides tight with right side board guiding gutter, and the frock is turned flat and is transferred into the welded zone, and welding robot welds.

After completion, the process proceeds to step S5.

S5, performing repair welding on the finished product of the S4; repairing welding the joint edges of the left side plate and the right side plate which are not welded in the S4 and the Zuo Ge port bottom plate and the right grid port bottom plate, and the joint edges of the left side plate and the right side plate and the back plate;

s6, performing gas-shielded arc welding repair welding on the finished product in the S5, wherein the gas-shielded arc welding repair welding comprises butt welding top cover and top plate and back plate joint edges with water guide grooves at the top, butt welding base and bottom plate joint edges, butt welding side plate and water guide groove joint edges, butt welding fixing plate and side plate joint parts and butt welding fixing plate cross intersection positions.

The clamping end of the tool clamp is provided with a sensor for detecting whether a workpiece is clamped or not. The sensor is a proximity switch.

And S3, corresponding to the position of the grid bottom plate, adopting a guide block to clamp and stabilize the grid bottom plate, and adopting a horn mouth type design on one side of the guide block, which faces the grid bottom plate.

Each step comprises a splicing station and a welding station, the splicing station and the welding station are switched through a positioner, a welding robot is used for welding at the welding station, and material conversion is carried out between each two steps through a carrying robot;

the spot welding and carrying process uses an IRB-6700 spot welding/carrying robot, and the arc welding process uses an IRB-2600 arc welding robot. The first five steps of the scheme are all spot welding, and the last step is arc welding.

The express cabinet welded by the process is respectively provided with the following dimensions: 2132mm,898mm, 178 mm, and about 120kg; the movable end of the carrying robot is connected with the gripping apparatus, the gripping apparatus is arranged corresponding to the express cabinet, a connecting table is arranged between the gripping apparatus and the robot, one end of the connecting table is fixedly connected with the gripping apparatus, the other end of the connecting table is an inclined table surface, the inclined table surface is a round surface, the movable end of the carrying robot is eccentrically arranged with the inclined table surface, and the eccentric distance is 200mm.

The size of the express cabinet exceeds two meters, the clamp and the middle turntable are very limited in the arm exhibition and the load of the IRB-6700 spot welding/carrying robot, and therefore the load and the accessibility can be met by adopting an eccentric installation mode of the gripping apparatus. In addition, from the position of welding spots, welding guns on the market cannot weld to the welding spots, and are realized by adopting non-standard welding guns.

All stations correspondingly use tool clamps corresponding to the workpieces, and the clamping ends of the tool clamps are provided with electromagnets.

For the scheme, most links of the process are spot welding. From the energy efficiency aspect: the arc welding is the most widely used welding method in industrial production, and the principle of the arc welding is that heat generated by arc discharge (commonly known as arc combustion) is utilized to melt a welding rod and a workpiece mutually and form a welding line after condensation, so that a welding process of a firm joint is obtained, the energy consumption is high, the workpiece is assembled into a lap joint and is tightly pressed between two electrodes, and the base metal of the pressed part of the electrode is melted by low voltage, high current and short time resistance heat to form a welding process of a nugget welding point. The energy efficiency is smaller.

Environmentally, the method comprises the following steps: in the arc welding process, the generated gas and smoke dust have toxicity. Particularly manganese oxide, carbon monoxide gas, etc., and vapor formed by vaporization of metal. The generated toxic gas has great influence on human body, arc welding staff needs to perform work type physical examination regularly, under the extremely severe large environment of the current environmental protection inspection for companies, the front five steps of the resistor assembly line adopt spot welding, the sixth step adopts arc welding, the sixth step is a pure automatic station, no human participation is needed, a dust collection device is additionally arranged outside the sixth step, and substances harmful to human body and environment are basically not generated.

From the personnel cost: the arc welding process needs to be re-taught at intervals (teaching: robot track re-writing), manual polishing is needed after arc welding, and it is known that polishing staff after arc welding before assembly line is far more than those needed in the previous processes, the polishing work environment is very poor, staff wages are relatively high, and fluidity is also high.

To sum up: the traditional arc welding process is changed into resistance spot welding, and the energy consumption of companies, the environment and the labor cost of later polishing are improved.

Example 2

Referring to fig. 1, an express cabinet welding production line comprises a logistics channel penetrating through the whole production line and a plurality of working procedure stations arranged on one side of the logistics channel, wherein a transfer robot is arranged between each working procedure station, and finished products of each working procedure are transferred through the transfer robot;

each working procedure station comprises a feeding station, a position changing machine and a welding station which are sequentially arranged; the feeding station is close to the logistics channel, the welding station is far away from the logistics channel, and a position shifter is arranged between the welding station and the feeding station;

the material loading station is communicated with the logistics channel, and the material loading station is provided with a sensor for sensing whether staff exists.

The position changing machine is a triaxial position changing machine.

Six working procedure stations are sequentially arranged along the logistics channel, a finished product outlet is arranged at one side of the working procedure station positioned at the tail end, the welding stations of the first five working procedure stations comprise two electric welding robots, and a plurality of arc welding robots are arranged at the welding station of the sixth working procedure station;

one side of each spot welding robot is provided with a coping device, and one side of each arc welding robot is provided with a gun cleaner.

The spot welding robot and the transfer robot are IRB-6700 spot welding/transfer robots, and the arc welding robot is IRB-2600 arc welding robot.

The scheme provides an operation mode of an express cabinet welding production line. The pipeline is compared with the traditional process under the condition of the same workload,

personnel comparison:

traditional arc welding: in a single working position, two persons work for about 45 cabinets in 8 hours, in addition, two additional persons are required to assemble the keel assembly by riveting, and about 10-12 persons are required to produce 200 pieces in 8 hours in a single shift.

And (3) pipeline: 4 persons.

At present, the mobility of production type workers is very high, and the payroll treatment is higher than that of other workshops. The pipeline solves the most headache problem of the management layer.

Example 3

The repair welding process which is the same as the fifth process is added between the fifth process and the sixth process on the basis of the embodiment 1 and the embodiment 2, and the efficiency of the whole process can be further improved.

Example 4

In combination with example 1 and example 2, the following optimization was performed on the basis of both.

In terms of simulation:

the length, width and height of the size of the express cabinet nest welded on the production line are respectively as follows: 2132mm,898mm, 178 mm, and about 120kg; the movable end of the carrying robot is connected with the gripping apparatus, the gripping apparatus is arranged corresponding to the express cabinet, a connecting table is arranged between the gripping apparatus and the robot, one end of the connecting table is fixedly connected with the gripping apparatus, the other end of the connecting table is an inclined table surface, the inclined table surface is a round surface, the movable end of the carrying robot is eccentrically arranged with the inclined table surface, and the eccentric distance is 200mm.

The size of the express cabinet exceeds two meters, the clamp and the middle turntable are very limited in the arm exhibition and the load of the IRB-6700 spot welding/carrying robot, and therefore the load and the accessibility can be met by adopting an eccentric installation mode of the gripping apparatus.

Referring to FIGS. 4-7, from the point of view of the solder joint, a solder gun model number SRTX-2C7636-LX4, SRTC-2C5776LX2, SRTC-2C5777LX2, SRTX-2C7635-LX5 is selected.

Welding the cabinet body and the bottom plate: the design of the special-shaped true welding gun simulates a gun inlet and outlet path, the welding gun is designed according to the cabinet body, and the maximum practical opening of the gun inlet and outlet is about 210 mm, so that the gun inlet and outlet does not interfere with the tool and the cabinet body, and welding of welding spots is realized.

Optimizing welding beats: and moving welding spots with longer working procedures to other sequences so as to realize the purpose of uniformly distributing the welding spots, wherein the welding beat of the express cabinet is 120 seconds, and if the scheme is applied to a nest-enlarging cabinet body, the beat is corrected to 150 seconds.

Carrying out spot welding on limit welding spots: because of the limit of the welding posture of the welding point robot, the axis of the positioner 1 is rotated by 45 degrees for welding. Such as: two repair welding spots on the inner side of the water guide groove of the cabinet body cannot be welded, and one shaft rotates to 45 degrees to realize welding.

In the PLC aspect.

Welding interference problem: the welding equipment is distributed and required differently along with the welding process points and extends over the whole welding area, so that electromagnetic interference caused by welding is everywhere.

The bus cable and the shielding function of the shielding layer of the power cable are effectively utilized. The field bus cables are usually shielded cables, which are frequently started and are typically selected by the frequency-changing transmission device. And during the type selection, a reliable cable is selected, and the integrity of the shielding layer is ensured.

Transmission equipment interference problem: the transmission equipment generates a large amount of high-frequency electromagnetic waves in the starting, stopping, running and speed regulation processes, so that interference is formed, and a nearby field control system is polluted.

A hardware filtering circuit is additionally arranged, and a hardware filtering circuit such as an input-output reactance is additionally arranged in a power loop of occasions such as frequent starting and frequency conversion, so that the harmonic wave, surge and peak current of a main power supply are reduced, the anti-interference performance of a control system is improved, and the stability of the system is ensured. Such as: and the HT2320-3-L8-H1 power filter of Hui Bodu is connected into the main control cabinet, namely the MPC cabinet, so as to realize the filtering of the main control cabinet power. And a CW4L2-30A-R filter of OMNICOM is accessed into a positioner control cabinet to realize the filtering of transmission equipment.

Power cable interference problem: nearby power plants such as: the power supply cables of a welding transformer, an air-purifying system motor and the like have high rated current due to high power of power equipment, and especially the instantaneous current can be up to 6-11 times of the rated current during starting, so that large current impact can be generated in a short time.

The method comprises the following steps:

1. the bus equipment is far away from the interference source, and the bus cable and the power cable are respectively paved. The magnitude of interference of the power equipment and the power cable on the control site to the field bus is inversely proportional to the square of the distance, namely the larger the distance is, the faster the interference attenuation is. The field bus equipment needs to be far away from power equipment such as a motor, a transformer and the like as far as possible;

2. and the field bus cable laying and the power cable laying are respectively carried out, so that at least layered bridge arrangement is realized.

3. And setting a proper communication rate. The overall length of the fieldbus network is inversely related to the communication rate, and generally the longer the overall length of the network, the lower the communication rate needs to be.

4. The repeater is additionally arranged, the network signal is amplified, and the network length is prolonged; optical cable communication is adopted; control system and cable arrangement and laying are combined with the process, etc.

Interference problem of power supply system: if the waveform distortion and the higher harmonic waves of the power frequency power supply are not isolated or filtered, the waveform distortion and the higher harmonic waves enter a control system through the surface of a power supply system, and the whole field bus is affected by the surface of the power supply system.

An isolation transformer and a stabilized voltage supply are additionally arranged. Interference from the power frequency power supply is prevented, and meanwhile interference caused by unstable power supply of a power supply loop is reduced.

Unstable problem caused by poor grounding: and the ground is reliably grounded. Ensuring the normal operation and personal safety of the equipment and simultaneously inhibiting electromagnetic interference. The field bus is grounded by a single point ground and a multi-point ground. Typically, single point grounding may be employed at operating frequencies below 1 MHZ. Such as: when using shielded cables for low frequency transmission of signals, the shielding of each branch is connected to the shielding of the trunk and finally concentrated at a point for grounding (i.e. single point grounding). According to the low-frequency field wire-determining standard, only one point of grounding is allowed on the whole cable, no grounding is allowed at any end of the bus, and the shielding layer cannot be used as a power wire. When the working frequency of the line field bus is above 10MHz, the line field bus can be grounded by multiple points or can be used in a mixed mode, and the specific situation is designed according to the characteristics of the selected field bus and the actual engineering.

The detail design aspect of the production line:

safety problem is guaranteed in tongs hovering: the gripper clamp is pneumatically clamped, and can fall off once the air is cut off. The safety of the gripper gripping member is ensured by adopting a self-locking structure and applying a pressure maintaining valve.

The welding spot copper-adding plate has a bump phenomenon: instead, the elastic sheet is indirectly connected with the copper plate, so that the problem of protruding points is solved.

Deformation problem of the water guide groove after welding: the upper and lower compressing blocks of a water guide groove are respectively added on two sides of the top cover to support a fixed size.

Example 5

Referring to fig. 4 to 6, on the basis of embodiment 4, when the nest-enlarging cabinet in the express cabinet is welded:

two spot welding robots are arranged in sequence, and the welding gun types are as follows: SRTX-2C7636-LX4;

two spot welding robots are arranged in the second order, and the welding gun types are respectively: SRTC-2C5777-LX2, SRTX-2C7636-LX4;

three-sequence two spot welding robots are arranged, and the welding gun types are all: SRTX-2C7636-LX4;

four-sequence two spot welding robots are arranged, and the welding gun types are all: SRTX-2C7635-LX5;

five-step setting two spot welding robots, and using welding gun types to respectively: SRTX-2C7635-LX5, SRTX-2C7636-LX4;

at least two arc welding robots are arranged in a six-sequence mode.

Referring to fig. 4, 5 and 6, a welding gun of the model SRTX-2C7636-LX4, a stationary arm 41 of 2C7636-LX4 extends in parallel with the movable end of a telescopic cylinder 42 of 2C7636-LX4, a stationary electrode is perpendicular to the axial extension line of the telescopic cylinder 42 of 2C7636-LX4, a bending rod bending towards the stationary arm 41 of 2C7636-LX4 is arranged at the rear part of the movable arm 43 of 2C7636-LX4, the end part of the bending rod is hinged below the rear part of the stationary arm 41 of 2C7636-LX4, and the bending part of the bending rod is hinged with the movable end of the telescopic cylinder 42 of 2C7636-LX 4. The 2C7636-LX4 movable arm 43 is pushed by the 2C7636-LX4 telescopic cylinder 42 to rotate and open by taking the hinge joint at the rear end of the movable arm 43 as the center of a circle, so that the movable electrode on the 2C7636-LX4 movable arm 43 is contacted and separated from the static electrode of the 2C7636-LX4 static arm 41.

Referring to fig. 7, 8 and 9, the welding gun of the model SRTC-2C5777-LX2 is configured such that the rear portion of the 2C5777-LX2 static arm 51 is bent toward the 2C5777-LX2 telescopic cylinder 52, the front portion is parallel to the axis of the movable end of the 2C5777-LX2 telescopic cylinder 52, and the electrostatic electrode at the end of the 2C5777-LX2 static arm 51 is disposed toward the movable end of the 2C5777-LX2 telescopic cylinder 52 and coaxial with the movable end of the 2C5777-LX2 telescopic cylinder 52, i.e., coaxial with the 2C5777-LX2 boom 53 disposed at the movable end of the 2C5777-LX2 telescopic cylinder 52. The movable electrode at the front end of the movable arm 53 of the 2C5777-LX2 is driven to touch the static electrode by stretching and retracting the movable end of the telescopic cylinder 52 of the 2C5777-LX 2.

Referring to fig. 10, 11 and 12, a welding gun of the type SRTX-2C7635-LX5, the rear portion of the 2C7635-LX5 stationary arm 61 is bent away from the 2C7635-LX5 telescopic cylinder 62, the middle portion is parallel to the axis of the 2C7635-LX5 telescopic cylinder 62, the front portion is bent toward the 2C7635-LX5 telescopic cylinder 62, and the center line of the front portion is perpendicular to the center line of the middle portion. The rear part of the 2C7635-LX5 movable arm 63 is provided with a bending rod which bends towards the rear part of the 2C7635-LX5 static arm 61, the rear end part of the bending rod is hinged below the 2C7635-LX5 static arm 61, and the bending rod is hinged at the movable end of the 2C7635-LX5 telescopic cylinder 62. The movable end of the 2C7635-LX5 telescopic cylinder 62 stretches to push the 2C7635-LX5 movable arm 63 to rotate and open by taking the hinged position of the rear end of the movable arm 63 as the circle center, so that the movable electrode on the 2C7635-LX5 movable arm 63 is contacted with and separated from the static electrode of the 2C7635-LX5 static arm 61.

Example 6

Referring to fig. 4 to 15, on the basis of embodiment 4, when the self-lifting cabinet in the express cabinet is welded:

five-step setting three spot welding robots, wherein the welding gun types are respectively: SRTX-2C7635-LX5, SRTX-2C7636-LX4, SRTC-2C5776-LX2;

at least two arc welding robots are arranged in a six-sequence mode.

Referring to fig. 13, unlike example 5, a welding gun of the type SRTC-2C5776-LX2 is additionally used in the fifth step, the rear part of the 2C5776-LX2 static arm 71 is parallel to the axis of the 2C5776-LX2 telescopic cylinder 72, the front part is toward the 2C5776-LX2 telescopic cylinder, the middle line of the front part is blown to the middle line of the rear part, the electrostatic electrode is disposed toward the movable end of the 2C5776-LX2 telescopic cylinder, the 2C5776-LX2 movable arm 73 is fixedly disposed at the front end of the movable end of the 2C5776-LX2 telescopic cylinder, and the static electrode is coaxial with the electric electrode.

The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

1. The express cabinet welding process is characterized by comprising the following steps of:

s1, welding parts of left and right baffle sub-assemblies: welding a middle partition plate and a grid bottom plate which are vertically arranged in the middle of the express cabinet one by one; the middle partition plate comprises a left electromagnetic lock fixing plate and a right electromagnetic lock fixing plate which are symmetrically attached, and the grid bottom plate comprises a plurality of left grid bottom plates and right grid bottom plates;

conveying welded left and right partition plate sub-assembly welding pieces to a next station;

s6, performing gas-shielded arc repair welding on the finished product of the step S5; and butt welding the top part of the water guide groove, the top cover and the back plate, butt welding the base and the bottom plate, butt welding the side plate and the water guide groove, butt welding the joint of the fixing plate and the side plate, and butt welding the cross intersection position of the fixing plate.

2. The express cabinet welding process according to claim 1, wherein in the step S1, corresponding tool clamps are used for clamping the middle partition plate and the grid bottom plate, the tool clamps are combined with holes in the middle partition plate and the grid bottom plate in a pin positioning mode, and an electromagnet is arranged at a clamping part of the tool clamps.

3. The express cabinet welding process according to claim 2, wherein a sensor for detecting whether a workpiece is clamped is arranged at the clamping end of the tool clamp.

4. The express cabinet welding process according to claim 1, wherein in the step S3, the grid bottom plate is clamped and stabilized by a guide block corresponding to the grid bottom plate, and one side of the guide block, which faces the grid bottom plate, is designed in a horn mouth shape.

5. The express cabinet welding process according to claim 1, wherein each step comprises a splicing station and a welding station, the splicing station and the welding station are switched through a positioner, welding is performed at the welding station by using a welding robot, and material conversion is performed between each two steps through a transfer robot;

the spot welding and carrying steps use IRB-6700 spot welding/carrying robots, and the arc welding steps use IRB-2600 arc welding robots;

6. The express cabinet welding process according to claim 5, wherein the express cabinet welded by the process has the dimensions of length, width and height of 2132mm,898mm and 178 mm respectively and has a weight of 120kg; the movable end of the carrying robot is connected with the gripping apparatus, the gripping apparatus is arranged corresponding to the express cabinet, a connecting table is arranged between the gripping apparatus and the robot, one end of the connecting table is fixedly connected with the gripping apparatus, the other end of the connecting table is an inclined table surface, the inclined table surface is a round surface, the movable end of the carrying robot is eccentrically arranged with the inclined table surface, and the eccentric distance is 200mm.