CN112122425A

CN112122425A - Method for processing shell of electrical appliance box body

Info

Publication number: CN112122425A
Application number: CN202010981991.1A
Authority: CN
Inventors: 王六四; 王选明
Original assignee: Anhui Zhongju Mechanical And Electrical Equipment Co ltd
Current assignee: Anhui Zhongju Mechanical And Electrical Equipment Co ltd
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2020-12-25

Abstract

The invention belongs to the field of electric appliance production and processing equipment, and particularly relates to a method for processing an electric appliance box shell, which comprises the following steps: step 1: conveying the metal plate into a bending forming machine; step 2: adjusting the distance between the two bending units and the two ends of the metal plate; and step 3: bending for the first time; and 4, step 4: adjusting the distance between the two bending units and the two ends of the metal plate again; and 5: bending for the second time; step 6: conveying the box body to a shaping station and fixing; and 7: clamping corners at two ends of the top wall of the box body and a seam of the top wall of the box body; and 8: inserting the clamping strips on two turned edges on the inner side of the seam of the top wall of the box body; in the steps 3 and 5, at least one end of the metal plate is supported in the bending process. The invention avoids the collapse of the suspended wall section in the forming process, and simultaneously avoids the collapse of the top wall in the downstream transportation process of the box body after the box body is formed, thereby providing convenience for the subsequent processing of the box body.

Description

Method for processing shell of electrical appliance box body

Technical Field

The invention belongs to the field of electric appliance production and processing equipment, and particularly relates to a method for processing an electric appliance box body shell.

Background

The housing of the electrical equipment is generally processed by a sheet metal bending and forming process, as shown in fig. 1, a strip-shaped metal plate is firstly bent into a rectangular cylindrical body, and then other structural members are riveted at two ends of the cylindrical body to form a complete shell. However, in the prior art, due to process requirements, a longer cantilever section appears at the top in the box body bending and forming process, and the cantilever section can cause the top of the box body to collapse towards the middle, as shown in fig. 2, the surface of the box body can be deformed in the subsequent transfer processing process, and the collapsed box body in the subsequent processing process is not beneficial to installing other structural members in the box body, so that inconvenience is brought to the subsequent processing.

Disclosure of Invention

The invention aims to provide a method for processing an outer shell of an electric appliance box body, which can support a hanging wall section of the box body in the forming process of the outer shell and after forming, and avoid the formed box body from collapsing in the subsequent processing process.

The technical scheme adopted by the invention is as follows:

a processing method of an electric appliance box body shell comprises the following steps:

step 1: conveying the cut and flanged metal plate into a bending forming machine, wherein the bending forming machine comprises two bending units which are arranged back to back, each bending unit comprises a supporting platform, a pressing seat and a bending roller, the supporting platform is fixedly connected with a machine base, the pressing seat is arranged with the supporting platform in an opening and closing mode along the vertical direction, an inner module is arranged at the bottom of the pressing seat, the inner module is provided with an acute-angle corner, the bending roller is arranged on the machine base in a swinging mode along an axis parallel to a self roller shaft, the vertex of the acute-angle corner is located on the swinging axis of the bending roller when the pressing seat is pressed with the supporting platform in a pressing mode, the machine base is arranged on a machine frame in a sliding mode along the horizontal direction, and the sliding direction of the machine base is perpendicular;

step 2: one bending unit clamps the metal plate, the other bending unit slides along the horizontal direction, and the distance between the two bending units and the two ends of the metal plate is sequentially adjusted by adopting the mode;

and step 3: the two bending units are used for bending two ends of the metal plate for the first time respectively;

and 4, step 4: adjusting the distance from the two bending units to the two ends of the metal plate again by adopting the method in the step 2;

and 5: the two bending units are used for respectively bending two ends of the metal plate for the second time, so that the metal plate has a rectangular box body with two top walls, two side walls and a bottom wall in the stroke;

step 6: conveying the bent box body to a shaping station, and fixing the box body along the width direction and the length direction of the box body;

and 7: clamping corners at two ends of the top wall of the box body by using a box body supporting mechanism, and then clamping the joint of the top wall of the box body along the vertical direction to ensure that the top wall at the joint keeps a horizontal posture;

and 8: inserting the clamping strips on the two turned edges on the inner side of the seam of the top wall of the box body, and clamping and fixing the two turned edges by using the clamping strips;

and step 9: the box body supporting mechanism loosens the box body, and the box body is pre-shaped;

in the steps 3 and 5, a cantilever supporting mechanism is adopted to support at least one end of the metal plate in the bending process; the suspension arm supporting mechanism comprises a first swing arm and a second swing arm, wherein one end of the first swing arm is hinged with the frame, the other end of the first swing arm is hinged with one end of the second swing arm, hinged shafts at two ends of the first swing arm are parallel to each other, and the suspension arm supporting mechanism also comprises a swing arm driving mechanism which is assembled to drive the second swing arm to swing relative to the first swing arm and drive the first swing arm to swing relative to the frame; one end of the second swing arm, which is far away from the first swing arm, is provided with a clamping mechanism; the first swing arm and the second swing arm are positioned at the side of the bending machine, and the axis of a hinge shaft between the first swing arm and the second swing arm is arranged corresponding to a break angle of the surface of the box body during first bending; the axis of a hinge shaft between the first swing arm and the rack is arranged corresponding to a break angle when the surface of the box body is bent for the second time; when the bending unit bends for the first time, the swing arm driving mechanism drives the second swing arm to swing for 90 degrees, and when the bending unit bends for the second time, the swing arm driving mechanism drives the first swing arm to swing for 90 degrees;

in the step 7, the box body supporting mechanism comprises an outer supporting part and an inner supporting part, the outer supporting part comprises a horizontal top plate, the bottom surface of the horizontal top plate is attached to the top surface of the box body, extension parts which protrude downwards are arranged at two ends of the horizontal top plate, and the extension parts are attached to the upper ends of two side walls of the box body; the inner supporting part comprises right-angle supporting blocks which are abutted with the inner sides of corners at two ends of the top wall of the box body and horizontal supporting blocks which are abutted with the bottom surfaces at two sides of the seam of the top wall of the box body; the right-angle supporting block is movably arranged along the vertical direction and the horizontal direction, and the horizontal supporting block is movably arranged along the vertical direction; the inner supporting part further comprises a fixed seat and a lifting seat, the lifting seat is movably connected with the fixed seat along the vertical direction, the right-angle supporting block is movably connected with the lifting seat along the horizontal direction and the vertical direction, a linkage mechanism is arranged between the right-angle supporting block and the lifting seat, and the linkage mechanism is assembled to drive the right-angle supporting block to be ejected upwards towards two ends of the lifting seat when the lifting seat is lifted to a specified position relative to the fixed seat;

in the step 8, the clamping strip is made of an elastic metal material, the clamping strip comprises two symmetrically arranged clamping walls, one side of each clamping wall is connected into a whole through a connecting part, and the other sides of the two clamping walls are mutually folded.

A linkage control mechanism is arranged between the first swing arm and the second swing arm, the linkage control mechanism is assembled to enable the first swing arm to be relatively static with the frame when the swing arm driving mechanism drives the second swing arm to swing along a first direction, enable the second swing arm to be relatively static with the first swing arm when the swing arm driving mechanism drives the first swing arm to swing along the first direction, and enable the second swing arm to swing along a second direction relative to the first swing arm when the swing arm driving mechanism drives the first swing arm to swing along the second direction, and the first direction and the second direction are two rotating directions with parallel rotating axes and opposite rotating directions; the linkage control mechanism comprises a first rotating shaft and a second rotating shaft which are arranged in parallel, the first rotating shaft and the second rotating shaft are respectively and rotatably arranged at two ends of a first swing arm, the first rotating shaft is connected with the first swing arm through a first one-way bearing, and the second rotating shaft and the first swing arm form damping rotation fit; the first rotating shaft is connected with the rack through a second one-way bearing, and the first one-way bearing and the second one-way bearing are assembled to enable the first rotating shaft to rotate relative to the first swing arm and the rack only along a first direction; a third rotating shaft parallel to the first rotating shaft and the second rotating shaft is arranged on the first swing arm, a first chain wheel is arranged on the first rotating shaft, a second chain wheel is arranged on the third rotating shaft, the first chain wheel and the second chain wheel are in transmission fit through an annular chain, a first gear synchronously and rotatably connected with the second chain wheel is arranged on the third rotating shaft, a second gear meshed with the first gear is arranged on the second rotating shaft, a clutch mechanism is arranged between the second rotating shaft and the second swing arm, the clutch mechanism is assembled in a way that the clutch mechanism is separated when the swing arm driving mechanism drives the second swing arm to swing, so that the second swing arm and the second rotating shaft form relative rotation fit, and the clutch mechanism is closed when the swing arm driving mechanism is separated from the second swing arm, so that the second swing arm and the second rotating shaft are synchronously and rotatably connected; clutch device includes the square shaft with second pivot rigid coupling to and set up the picture peg on the second swing arm along the radial slip of second pivot, be equipped with U type groove on the picture peg, the width in U type groove is unanimous with the width between the two relative straight walls of square shaft, and the synchronous normal running fit of second swing arm and second pivot when U type groove is inserted on the square shaft, second swing arm and the relative normal running fit of second pivot when U type slot breaks away from with the square shaft.

The swing arm driving mechanism comprises a driving shaft, the axis of the driving shaft is parallel to the axes of the first rotating shaft and the second rotating shaft, and the driving shaft is movably arranged between the first rotating shaft and the second rotating shaft; the end part of the driving shaft is provided with a strip-shaped driving block arranged along the radial direction of the driving shaft; a first meshing block coaxial with the first rotating shaft is arranged on the first swing arm, a second meshing block coaxial with the second rotating shaft is arranged on the second swing arm, a strip-shaped slot matched with the strip-shaped driving block is arranged on the end face of one side, opposite to the driving shaft, of the first meshing block, and a fan-shaped slot matched with the strip-shaped driving block is arranged on one side, opposite to the driving shaft, of the second meshing block; the driving shaft is coaxially and fixedly connected with the oscillating shaft of the bending roller; be equipped with first elastic unit between picture peg and the second swing arm, first elastic unit is assembled for its elasticity can order about the U type slot and the square shaft of picture peg and insert and close, still be equipped with cowl on the picture peg, can push away cowl and make the U type slot and the square shaft of picture peg break away from when the radial fan-shaped slot that inserts of second pivot is followed to the bar drive block.

The transmission ratio between the first gear and the second gear is 1: 1; the transmission ratio between the first chain wheel and the second chain wheel is 1: 1; a first limiting block used for limiting the swing angle of the first swing arm relative to the frame to be 0-90 degrees is arranged between the first swing arm and the frame; and a second limiting block used for limiting the swing angle of the second swing arm relative to the first swing arm to 0-90 degrees is arranged between the first swing arm and the second swing arm.

In the step 6, a transfer mechanism is adopted to convey the bent and formed box body to a shaping station, the transfer mechanism comprises a discharging frame and a discharging conveying roller, the transfer mechanism is positioned on one side, away from the cantilever supporting mechanism, of the bending unit, the discharging frame comprises a translation support and a lifting support, the translation support is movably arranged on a cross beam along a direction parallel to the bending roller, the lifting support is movably arranged on the translation support along the vertical direction, a driving element for driving the lifting support to vertically move is arranged on the translation support, a fork wall is arranged on the lifting support, the fork wall is arranged in a cantilever manner towards one side where the bending unit is positioned, a plurality of fork walls are arranged, the fork walls are respectively arranged below a top plate and a bottom plate of the formed box body, and the overhanging section of each fork wall is provided with an upwardly convex hook block; the lifting support is also provided with two guard plates which are arranged in parallel at intervals along the horizontal direction, and the two guard plates are respectively arranged corresponding to the outer sides of the two side walls of the molded box body; the discharging conveying roller is positioned below the translation path of the translation bracket.

In the step 8, the clamping strips are inserted by adopting an insertion mechanism, the insertion mechanism comprises a feeding groove, a sliding groove and a pushing mechanism, the feeding groove is used for stacking the clamping strips in parallel, and the two clamping walls of the clamping strips are stacked in the feeding groove with the folding ends upward; the feeding mechanism comprises a feeding groove, a sliding groove, a pushing mechanism and a pushing mechanism, wherein the sliding groove is positioned below the feeding groove, the sliding groove is arranged opposite to a seam area of the top wall of the box body along the width direction of the box body, a clamping strip at the lowest layer of the feeding groove can naturally fall into the sliding groove, the pushing mechanism comprises a pushing block arranged in the sliding groove, and the pushing block is driven by a driving element and reciprocates in the sliding groove; the right-angle supporting block is movably connected with the sliding seat along the vertical direction, the sliding seat is in sliding connection with the lifting seat along the horizontal direction, a wedge-shaped surface is arranged on the right-angle supporting block, wedge-shaped driving surfaces are arranged at two ends of the lifting seat, and when the sliding seat slides to the end part of the lifting seat, the wedge-shaped driving surfaces extrude the wedge-shaped surface to enable the right-angle supporting block to be lifted upwards relative to the sliding seat; a second elastic unit is arranged between the right-angle supporting block and the sliding seat, the second elastic unit is assembled to enable the elastic force of the second elastic unit to drive the right-angle supporting block to move downwards relative to the sliding seat, and when the sliding seat slides towards the direction far away from the end part of the lifting seat, the right-angle supporting block moves downwards relative to the sliding seat under the action of the second elastic unit; a third elastic unit is arranged between the sliding seat and the lifting seat, the third elastic unit is assembled to enable the elastic force of the third elastic unit to drive the sliding seat to slide towards the end part of the lifting seat, a locking mechanism is further arranged between the sliding seat and the lifting seat, the locking mechanism is assembled to enable the sliding seat to be locked at a station far away from the end part of the lifting plate when the sliding seat is located at the station, and the locking mechanism can release the sliding seat to enable the sliding seat to slide towards the end part of the lifting seat under the action of the third elastic unit when the lifting seat is lifted to a specified height; and the linkage resetting mechanism is assembled to drive the sliding seat to slide from the end part of the lifting seat to the inner side of the lifting seat to a station far away from the end part of the lifting plate when the lifting seat moves downwards from the specified height.

The locking mechanism comprises a round hole and a strip hole which are formed in the sliding seat and are communicated with each other, and a locking pin which is arranged on the lifting seat in a sliding mode along the vertical direction, the locking pin is inserted into the round hole and the strip hole, the width of the strip hole is smaller than that of the round hole, an annular groove is formed in the locking pin, the diameter of the locking pin is smaller than or equal to that of the round hole and larger than that of the strip hole, the diameter of the bottom of the annular groove is smaller than that of the strip hole, a fourth elastic unit is arranged between the locking pin and the lifting seat, the fourth elastic unit is assembled to enable the annular groove of the locking pin to be staggered with the strip hole and the round hole along the axial direction of the locking pin due to the elastic force of the fourth elastic unit, the unlocking driving mechanism is further included, and the unlocking driving mechanism is assembled; the unlocking driving mechanism comprises a lifting plate, the upper end of the locking pin is provided with a radial flange, the top surface of the lifting plate is in blocking connection with the bottom surface of the radial flange, the lifting plate is fixed on a horizontal supporting block, the horizontal supporting block is fixedly connected with a piston rod of a piston cylinder vertically arranged on a fixed seat, the bottom surface of the horizontal supporting block is in blocking connection with the top surface of a lifting seat, a fifth elastic unit is arranged between the horizontal supporting block and the lifting seat, the fifth elastic unit is assembled into a structure that the elastic force of the fifth elastic unit can drive the lifting seat to move upwards relative to the horizontal supporting block, a vertical guide pillar is arranged on the fixed seat, the lifting seat is in sliding fit with the vertical guide pillar, the top end of the vertical guide pillar is provided with a convex ring, the bottom surface of the convex ring is in blocking connection with; when the piston cylinder drives the horizontal supporting block to move upwards, the horizontal supporting block drives the lifting seat to move upwards synchronously through the fifth elastic unit, when the lifting seat is blocked with a convex ring at the upper end of the vertical guide pillar, the lifting seat is blocked by the convex ring to stop moving upwards, and when the horizontal supporting block continues to move upwards, the locking pin can be driven to slide upwards relative to the lifting seat so that the annular groove is aligned with the circular hole and the strip hole; the linkage resetting mechanism comprises a wedge block arranged on the sliding seat and a wedge-shaped driving block arranged on the fixed seat, wherein the wedge block and the wedge-shaped driving block are assembled to extrude the wedge block when the lifting seat is down, and the sliding seat slides to the direction far away from the end part of the lifting seat until the round hole is aligned to the vertical direction of the locking pin.

The baffle wall is positioned on one side which is simultaneously adjacent to the side wall, the bottom wall and the top wall of the box body, one side of the horizontal top plate, which is far away from the baffle wall, is provided with a baffle strip which protrudes downwards, and the baffle strip is blocked and connected with a flanging on one side, which is far away from the baffle wall, of the top wall of the box body; the baffle wall is fixedly arranged on the rack, the external support and the internal support are both arranged on a movable support, and the movable support is movably arranged on the rack along the width direction of the box body; the inserting mechanism is positioned on one side of the box body, which is far away from the blocking wall, and the inserting mechanism is arranged on the movable support.

An avoidance groove is arranged at the position, corresponding to the seam of the top wall of the box body, of the horizontal supporting block, and when the horizontal supporting block is attached to the bottom surface of the top wall of the box body, the avoidance groove is in butt joint with the sliding groove to form a channel for the clamping strip to slide; a wedge block is arranged in a butt joint area of the avoiding groove and the sliding groove, the width of one end, close to the sliding groove, of the wedge block is larger than that of one end, close to the avoiding groove, of the wedge block, one end, facing the sliding groove, of the wedge block is in an arrow shape, the vertex of the arrow is located on the central line of the clamping strip, and when the clamping strip passes through the wedge block, the wedge block can prop open two clamping walls of the clamping strip; the wedge block is fixedly connected with the groove wall of the avoidance groove or the sliding groove.

The second elastic unit, the third elastic unit, the fourth elastic unit and the fifth elastic unit are compression springs; the piston cylinder is an air cylinder; the driving element is an electric cylinder, and the push block is fixed on a sliding block of the electric cylinder.

The invention has the technical effects that: according to the invention, the supporting mechanism is adopted to support the cantilever section in the bending and forming process of the box body shell, so that the collapse of the cantilever section in the forming process is avoided, meanwhile, the seam at the top wall of the box body is temporarily fixed by the pre-setting device after the box body is formed, the collapse of the top wall in the downstream transportation process of the box body is avoided, and convenience is provided for the subsequent processing of the box body.

Drawings

FIG. 1 is a schematic view of an electrical box forming process according to the present invention;

FIG. 2 is a schematic side view of a molded electrical box in the prior art;

FIG. 3 is a perspective view of an appliance housing molding system provided by an embodiment of the present invention;

FIG. 4 is a perspective view of a box bending machine provided in an embodiment of the present invention;

fig. 5 and 6 are schematic diagrams illustrating the operation of the bending unit according to the embodiment of the present invention;

fig. 7 is a schematic perspective view of a part of a bending machine according to an embodiment of the present invention, in which a bending unit on the right side is omitted;

fig. 8 is a schematic partial perspective view of a bending machine provided in accordance with an embodiment of the present invention;

FIG. 9 is an enlarged view of portion I of FIG. 8;

FIG. 10 is a perspective view of a hanging wall support mechanism provided by an embodiment of the present invention;

FIG. 11 is a front view of a hanging wall support mechanism provided by an embodiment of the present invention;

FIG. 12 is a cross-sectional view of a hanging wall support mechanism provided by an embodiment of the present invention;

FIG. 13 is a cross-sectional view of one state of a clutch mechanism provided by an embodiment of the present invention;

FIG. 14 is a cross-sectional view of another state of the clutch mechanism provided by the embodiment of the present invention;

fig. 15 is a partial perspective view of a bending machine provided in accordance with an embodiment of the present invention during a first bending;

fig. 16 is a partial perspective view of a bending machine provided in accordance with an embodiment of the present invention during a second bending;

FIG. 17 is a perspective view of an initial state of a cantilever support mechanism provided by an embodiment of the present invention;

FIG. 18 is a perspective view of a cantilever support mechanism provided in an embodiment of the present invention during a first bend;

FIG. 19 is a perspective view of a second bend in the cantilever support mechanism provided by an embodiment of the present invention;

FIG. 20 is a flowchart of a gripper mechanism action process provided by an embodiment of the present invention;

FIG. 21 is a perspective view of a pre-shaping apparatus provided by an embodiment of the present invention;

FIG. 22 is a perspective view of another perspective of the pre-forming apparatus provided in accordance with an embodiment of the present invention, with the outer supports, retaining walls and discharge conveyor rollers removed;

fig. 23 is a perspective view from another perspective of the state shown in fig. 22;

FIG. 24 is a top plan view of the condition shown in FIG. 22;

FIG. 25 is a sectional view A-A of FIG. 24;

FIG. 26 is a cross-sectional view B-B of FIG. 24;

FIG. 27 is an enlarged partial view I of FIG. 24;

FIG. 28 is a cross-sectional view C-C of FIG. 26;

fig. 29 is a perspective view of a discharge frame provided in an embodiment of the present invention.

Detailed Description

In order that the objects and advantages of the invention will be more clearly understood, the following description is given in conjunction with the accompanying examples. It is to be understood that the following text is merely illustrative of one or more specific embodiments of the invention and does not strictly limit the scope of the invention as specifically claimed.

Example 1

As shown in fig. 3, an electrical appliance housing forming system comprises a bending forming machine, a transfer mechanism and a pre-forming device, wherein the bending forming machine is used for bending a long strip metal plate 1 into an annular rectangular box housing, and a seam of the box housing is positioned on a top wall; the transfer mechanism is used for transferring the box body shell on the bending forming machine to the pre-forming device, and the pre-forming device is used for temporarily fixing the joint of the box body shell to prevent the top wall from collapsing. According to the invention, after the box body shell is bent and formed, the seam at the top wall of the box body is temporarily fixed by using the pre-setting device, so that the top wall of the box body is prevented from collapsing in the downstream transportation process, and convenience is provided for the subsequent processing of the box body.

Specifically, the bending forming machine comprises two bending units 10 which are arranged back to back, each bending unit 10 comprises a supporting table 14, a pressing seat 12 and a bending roller 11, the supporting table 14 is fixedly connected with the machine base, the pressing seat 12 is arranged on the supporting table 14 in an opening and closing mode along the vertical direction, an inner module 13 is arranged at the bottom of the pressing seat 12, the inner module 13 is provided with an acute-angle corner, the bending roller 11 is arranged on the machine base in a swinging mode along an axis parallel to a self roller shaft, the vertex of the acute-angle corner is located on the swinging axis of the bending roller 11 when the inner module 13 is pressed on the supporting table 14, the machine base is arranged on the machine base in a sliding mode along the horizontal direction, and the sliding direction of the machine base is perpendicular to the axis direction of the bending roller; the hanging wall supporting mechanism 20 is used for supporting a hanging wall section formed by bending the surface of a box body for two times in the same direction by 90 degrees, the hanging wall supporting mechanism 20 comprises a first swing arm 21 and a second swing arm 22, one end of the first swing arm 21 is hinged with the rack, the other end of the first swing arm is hinged with one end of the second swing arm 22, hinged shafts at two ends of the first swing arm 21 are parallel to each other, and the hanging wall supporting mechanism further comprises a swing arm driving mechanism which is assembled to drive the second swing arm 22 to swing relative to the first swing arm 21 and drive the first swing arm 21 to swing relative to the rack; one end of the second swing arm 22, which is far away from the first swing arm 21, is provided with a clamping mechanism 30; the first swing arm 21 and the second swing arm 22 are positioned at the side of the bending unit 10, and the axis of a hinge shaft between the first swing arm 21 and the second swing arm 22 is arranged corresponding to a bending angle of the surface of the box body during first bending; the axis of the hinge shaft between the first swing arm 21 and the frame is arranged corresponding to the bending angle of the surface of the box body during the second bending. According to the invention, the cantilever supporting mechanism 20 is additionally arranged beside the bending machine, so that the plate surface can be supported in the box body bending process, and the plate surface is prevented from collapsing after being bent.

Preferably, the clamping mechanism 30 includes a fixing plate 32 fixedly connected to the second swing arm 22 and a clamping plate 31 rotatably connected to the second swing arm 22, the clamping plate 31 is long, and the length direction of the clamping plate 31 is horizontally arranged and perpendicular to the second swing arm 22; a balancing weight 33 is fixedly connected to the rotating shaft of the clamping plate 31; when the second swing arm 22 is in the initial station of the horizontal state, the clamping plate 31 and the fixing plate 32 are respectively arranged on the upper side and the lower side of the surface of the box body which is not bent, and the clamping plate 31 is in the overhanging state under the action of the balancing weight 33 and is separated from the surface of the box body; when the surface of the box body is bent for the first time, the second swing arm 22 swings to a vertical posture, the clamping plate 31 swings towards the direction close to the fixing plate 32 relative to the second swing arm 22 under the action of the balancing weight 33 and the surface of the box body is clamped tightly; when the surface of the box body is bent for the second time, the first swing arm 21 swings to a vertical posture, the second swing arm 22 is static relative to the first swing arm 21 and swings to a horizontal posture relative to the rack, and in the process, the clamping plate 31 always abuts against the surface of the box body and the fixing plate 32 under the action of the balancing weight 33; a first swing rod 34 and a second swing rod 36 are fixedly connected to a rotating shaft of the clamping plate 31, and a first pin shaft 35 and a second pin shaft 37 are respectively arranged on the first swing rod 34 and the second swing rod 36; the lifting block 15 is positioned below the first pin shaft 35 and is blocked with the first pin shaft 35 when the first swing arm 21 swings to a vertical posture, and at the moment, the lifting block 15 is lifted upwards to drive the rotating shaft of the clamping plate 31 to rotate and enable the gravity center of the balancing weight 33 to pass through the upper part of the axis of the rotating shaft of the clamping plate 31; when the second swing arm 22 is reset to the initial station, the top block 38 is blocked with the second pin 37 and the top block 38 pushes the rotating shaft of the clamping plate 31 to rotate, so that the gravity center of the counterweight 33 passes over the axial center of the rotating shaft of the clamping plate 31 again, and the counterweight 33 is reset; the lifting block 15 is fixedly connected with the pressing seat 12.

Further, a linkage control mechanism is arranged between the first swing arm 21 and the second swing arm 22, the linkage control mechanism is configured such that the first swing arm 21 is relatively stationary with the frame when the swing arm driving mechanism drives the second swing arm 22 to swing in the first direction, the second swing arm 22 is relatively stationary with the first swing arm 21 when the swing arm driving mechanism drives the first swing arm 21 to swing in the first direction, and the second swing arm 22 can simultaneously swing in the second direction with respect to the first swing arm 21 when the swing arm driving mechanism drives the first swing arm 21 to swing in the second direction, the first direction and the second direction are two rotation directions with parallel rotation axes and opposite rotation directions, taking fig. 11 as an example, the counterclockwise direction in fig. 11 is the first direction, and the clockwise direction is the second direction; the linkage control mechanism comprises a first rotating shaft 23 and a second rotating shaft 24 which are arranged in parallel, the first rotating shaft 23 and the second rotating shaft 24 are respectively and rotatably arranged at two ends of the first swing arm 21, wherein the first rotating shaft 23 is connected with the first swing arm 21 through a first one-way bearing 233, and the second rotating shaft 24 and the first swing arm 21 form damping rotation fit; the first rotating shaft 23 is in turn connected to the frame by a second one-way bearing 232, the first one-way bearing 233 and the second one-way bearing 232 being assembled such that the first rotating shaft 23 can only rotate in a first direction relative to the first swing arm 21 and the frame; a third rotating shaft 25 parallel to the first rotating shaft 23 and the second rotating shaft 24 is arranged on the first swing arm 21, a first chain wheel 231 is arranged on the first rotating shaft 23, a second chain wheel 251 is arranged on the third rotating shaft 25, the first chain wheel 231 and the second chain wheel 251 are in transmission fit through an annular chain 26, a first gear 252 synchronously and rotatably connected with the second chain wheel 251 is arranged on the third rotating shaft 25, a second gear 241 meshed with the first gear 252 is arranged on the second rotating shaft 24, a clutch mechanism is arranged between the second rotating shaft 24 and the second swing arm 22, and the clutch mechanism is assembled to be separated when the swing arm driving mechanism drives the second swing arm 22 to swing, so that the second swing arm 22 and the second rotating shaft 24 form relative rotation fit, and is closed when the swing arm driving mechanism is separated from the second swing arm 22, so that the second swing arm 22 and the second rotating shaft 24 are synchronously and rotatably connected; when the first swing arm 21 swings upwards, the first rotating shaft 23 rotates synchronously with the first swing arm 21 under the action of the first one-way bearing 233, at this time, the first chain wheel 231 is static relative to the first swing arm 21, so that the second rotating shaft 24 is not driven to rotate relative to the first swing arm 21, and when the first swing arm 21 swings downwards, the first rotating shaft 23 keeps static relative to the frame under the action of the second one-way bearing 232, and simultaneously forms relative rotation with the first swing arm 21, at this time, the second rotating shaft 24 is driven to rotate relative to the first swing arm 21 under the transmission of the chain wheel and the gear, so that the second swing arm 22 is driven to swing relative to the first swing arm 21, and in this process, the simultaneous resetting of the first swing arm 21 and the second swing arm 22 is realized, the swing arm driving mechanism does not need to move again to drive the second swing arm 22 to reset separately, so that the action flow is simplified, and. The clutch mechanism comprises a square shaft 242 fixedly connected with the second rotating shaft 24 and an inserting plate 223 arranged on the second swing arm 22 in a sliding mode along the radial direction of the second rotating shaft 24, a U-shaped groove is formed in the inserting plate 223, the width of the U-shaped groove is consistent with the width between two opposite walls of the square shaft 242, the second swing arm 22 is in synchronous rotating fit with the second rotating shaft 24 when the U-shaped groove is inserted in the square shaft 242, and the second swing arm 22 is in relative rotating fit with the second rotating shaft 24 when the U-shaped groove is separated from the square shaft 242; the swing arm driving mechanism comprises a driving shaft 27, the axis of the driving shaft 27 is parallel to the axes of the first rotating shaft 23 and the second rotating shaft 24, and the driving shaft 27 is movably arranged between the first rotating shaft 23 and the second rotating shaft 24; the end part of the driving shaft 27 is provided with a strip-shaped driving block 271 arranged along the radial direction of the driving shaft 27; a first meshing block 211 coaxial with the first rotating shaft 23 is arranged on the first swing arm 21, a second meshing block 221 coaxial with the second rotating shaft 24 is arranged on the second swing arm 22, a strip-shaped slot 212 matched with the strip-shaped driving block 271 is arranged on the end surface of one side, opposite to the driving shaft 27, of the first meshing block 211, and a fan-shaped slot 242 matched with the strip-shaped driving block 271 is arranged on one side, opposite to the driving shaft 27, of the second meshing block 221; the driving shaft 27 is coaxially and fixedly connected with the swinging shaft of the bending roller 11, so that the bending unit 10 can realize the switching of the stations of the swinging arm driving mechanism in the process of adjusting the distance; a first elastic unit 225 is arranged between the insertion plate 223 and the second swing arm 22, the first elastic unit 225 is assembled such that the elastic force of the first elastic unit 225 can drive the U-shaped insertion slot of the insertion plate 223 to be inserted into the square shaft 242, and an arc-shaped baffle 224 is further arranged on the insertion plate 223, and when the strip-shaped driving block 271 is inserted into the fan-shaped insertion slot 242 along the radial direction of the second rotating shaft 24, the arc-shaped baffle 224 can be pushed and the U-shaped insertion slot of the insertion plate 223 can be separated from the square shaft 242.

Preferably, the transmission ratio between the first gear 252 and the second gear 241 is 1: 1; the transmission ratio between the first sprocket 231 and the second sprocket 251 is 1: 1; a first limiting block used for limiting the swing angle of the first swing arm 21 relative to the frame to 0-90 degrees is arranged between the first swing arm 21 and the frame; a second limiting block used for limiting the swing angle of the second swing arm 22 relative to the first swing arm 21 to be 0-90 degrees is arranged between the first swing arm 21 and the second swing arm 22.

Preferably, the transfer mechanism comprises a discharging frame 40 and a discharging conveying roller 50, the transfer mechanism is located on one side of the bending unit 10 away from the suspended wall supporting mechanism 20, the discharging frame 40 comprises a translation bracket 42 and a lifting bracket 43, the translation bracket 42 is movably arranged on a cross beam 41 along a direction parallel to the bending roller, the lifting bracket 43 is movably arranged on the translation bracket 42 along the vertical direction, a driving element for driving the lifting bracket 43 to vertically move is arranged on the translation bracket 42, a fork wall 44 is arranged on the lifting bracket 43, the fork wall 44 is arranged in a suspended manner towards one side of the bending unit 10, the fork walls 44 are provided with a plurality of parts, the fork walls 44 are respectively arranged below a top plate and a bottom plate of the formed box body, and a suspended section of the fork wall 44 is provided with an upward convex hook block 45; two guard plates 46 which are arranged in parallel at intervals along the horizontal direction are further arranged on the lifting support 43, and the two guard plates 46 are respectively arranged corresponding to the outer sides of two side walls of the molded box body; the discharge conveyor roller 50 is located below the translation path of the translation carriage 42. After the box body is bent and formed, the translation support 42 translates towards the box body, the fork wall 44 extends to the lower portion of the top wall and the bottom wall of the box body, then the lifting support 43 is lifted, the fork wall 44 supports the box body for one end distance and enables the hook block 45 to hook the edge of the box body, then the translation support 42 moves towards the direction far away from the bending unit 10, and then the box body is placed on the discharging conveying roller 50, so that the discharging operation of the box body from the bending forming machine is realized.

The pre-shaping device is positioned on the conveying path of the discharging conveying roller 50; specifically, the pre-shaping device comprises a clamping strip 91, a box body supporting mechanism and an inserting mechanism 90, wherein the clamping strip 91 is made of elastic metal materials, the clamping strip 91 comprises two symmetrically arranged clamping walls, one side of each of the two clamping walls is connected into a whole through a connecting part, and the other side of each of the two clamping walls is mutually folded; the box body supporting mechanism comprises an outer supporting part 60 and an inner supporting part 80, the outer supporting part 60 comprises a horizontal top plate, the bottom surface of the horizontal top plate is attached to the top surface of the box body, two ends of the horizontal top plate are provided with extending parts which protrude downwards, and the extending parts are attached to the upper ends of two side walls of the box body; the inner supporting part 80 comprises a right-angle supporting block 85 which is abutted with the inner sides of the corners at the two ends of the top wall of the box body and a horizontal supporting block 83 which is abutted with the bottom surfaces at the two sides of the seam of the top wall of the box body; the right-angle supporting block 85 is movably arranged along the vertical direction and the horizontal direction, and the horizontal supporting block 83 is movably arranged along the vertical direction; the inner support part 80 further comprises a fixed seat 81 and a lifting seat 82, the lifting seat 82 is movably connected with the fixed seat 81 along the vertical direction, the right-angle supporting block 85 is movably connected with the lifting seat 82 along the horizontal direction and the vertical direction, a linkage mechanism is arranged between the right-angle supporting block 85 and the lifting seat 82, and the linkage mechanism is assembled to drive the right-angle supporting block 85 to be ejected upwards towards two ends of the lifting seat 82 when the lifting seat 82 is lifted to a specified position relative to the fixed seat 81; the box body structure is characterized by further comprising a blocking wall 70, wherein the blocking wall 70 is positioned on one side which is adjacent to the side wall, the bottom wall and the top wall of the box body at the same time, one side of the horizontal top plate, which is far away from the blocking wall 70, is provided with a blocking strip which protrudes downwards, and the blocking strip is blocked and connected with a flanging on one side, which is far away from the blocking wall 70, of the top wall of the box body; the cooperation of the retaining wall 70 and the retaining strip enables positioning in the width direction of the box. The blocking wall 70 is fixedly arranged on the frame, the external support and the internal support are both arranged on a movable bracket 96, and the movable bracket 96 is movably arranged on the frame along the width direction of the box body; the inserting mechanism 90 is positioned on one side of the box body, which is far away from the blocking wall 70, and the inserting mechanism 90 is arranged on a movable bracket 96; the inserting mechanism 90 comprises a feeding groove 92, a sliding groove 93 and a pushing mechanism, the feeding groove 92 is used for stacking the clamping strip 91 in parallel, and the clamping strip 91 is stacked in the feeding groove 92 with two clamping walls with the closing ends facing upwards; the sliding groove 93 is positioned below the feeding groove 92, the sliding groove 93 is arranged opposite to the seam area of the top wall of the box body along the width direction of the box body, the clamping strip 91 at the lowest layer of the feeding groove 92 can naturally fall into the sliding groove 93, the pushing mechanism comprises a pushing block 94 arranged in the sliding groove 93, and the pushing block 94 is driven by a driving element 95 and reciprocates in the sliding groove 93; the box body supporting mechanism provided by the invention can clamp corners between the top wall and the side walls of the box body from the inner side and the outer side, simultaneously clamp a joint area of the top wall of the box body, insert the clamping strip 91 on the flanging at the joint by using the inserting mechanism 90, and clamp the two flanging by using the clamping strip 91 to realize temporary fixation of the joint, so that the top wall can form a whole, the structural strength is better, the box body is prevented from collapsing and deforming, and convenience is provided for subsequent processing. In addition, the box body supporting mechanism is inserted into the box body from the position which is lower than the center of the box body, and then the top wall of the box body is gradually lifted upwards, so that the collapsed box body can be righted, and the clamping strips 91 are ensured to be accurately inserted in place. An avoiding groove 831 is formed in the position, corresponding to the seam of the top wall of the box body, of the horizontal supporting block 83, and when the horizontal supporting block 83 is attached to the bottom surface of the top wall of the box body, the avoiding groove 831 is in butt joint with the sliding groove 93 to form a channel for the clamping strip 91 to slide; a wedge 97 is arranged in the butt joint area of the avoidance groove 831 and the sliding groove 93, the width of one end, close to the sliding groove 93, of the wedge 97 is larger than that of one end, close to the avoidance groove 831, of the wedge 97, one end, facing the sliding groove 93, of the wedge 97 is in an arrow shape, the vertex of the arrow is located on the central line of the clamping strip 91, and when the clamping strip 91 passes through the wedge 97, the wedge 97 can stretch out two clamping walls of the clamping strip 91 so that flanging can enter between the two clamping walls; the wedge 97 is fixedly connected with the groove wall of the avoiding groove 831 or the sliding groove 93.

Preferably, the right-angle supporting block 85 is movably connected with the sliding base 84 in the vertical direction, the sliding base 84 is slidably connected with the lifting base 82 in the horizontal direction, a wedge-shaped surface 852 is arranged on the right-angle supporting block 85, wedge-shaped driving surfaces 822 are arranged at two ends of the lifting base 82, and when the sliding base 84 slides towards the end of the lifting base 82, the wedge-shaped driving surfaces 822 press the wedge-shaped surface 852 to lift the right-angle supporting block 85 upwards relative to the sliding base 84; a second elastic unit 851 is arranged between the right-angle supporting block 85 and the sliding seat 84, the second elastic unit 851 is assembled in such a way that the elastic force of the second elastic unit 851 can drive the right-angle supporting block 85 to move downwards relative to the sliding seat 84, and the right-angle supporting block 85 moves downwards relative to the sliding seat 84 under the action of the second elastic unit 851 when the sliding seat 84 slides away from the end of the lifting seat 82; a third elastic unit 841 is arranged between the sliding seat 84 and the lifting seat 82, the third elastic unit 841 is assembled to enable the elastic force of the third elastic unit 841 to drive the sliding seat 84 to slide towards the end of the lifting seat 82, a locking mechanism is further arranged between the sliding seat 84 and the lifting seat 82, the locking mechanism is assembled to enable the sliding seat 84 to be locked at a station far away from the end of the lifting plate when the sliding seat 84 is at the station, and the locking mechanism can release the sliding seat 84 to enable the sliding seat 84 to slide towards the end of the lifting seat 82 under the action of the third elastic unit 841 when the lifting seat 82 is lifted to a specified height; a linkage resetting mechanism which is assembled to drive the sliding seat 84 to slide from the end part of the lifting seat 82 to the inner side of the lifting seat 82 to a station far away from the end part of the lifting plate when the lifting seat 82 moves downwards from the specified height; according to the invention, the right-angle supporting block 85 is lifted upwards for a distance along with the lifting seat 82, the sliding seat 84 is locked by the locking mechanism in the lifting process, the right-angle supporting block 85 is prevented from popping out towards two sides, friction between the right-angle supporting block 85 and the inner wall of the box body is further avoided, the locking mechanism can be automatically triggered to unlock after the right-angle supporting block is lifted to a specified height, the sliding seat 84 pops out towards two sides under the action of the third elastic unit 841, the right-angle supporting block 85 pops out obliquely upwards under the action of the wedge-shaped driving surface 822 and the wedge-shaped surface 852, so that the right-angle supporting block 85 is attached to the corner of the box body along an oblique path.

Preferably, the locking mechanism comprises a circular hole and a strip hole which are arranged on the sliding seat 84 and are communicated with each other, and a locking pin 844 arranged on the lifting seat 82 in a sliding manner along the vertical direction, wherein circular holes and strip holes are formed in a locking plate 843 fixedly connected with the sliding seat 84, the locking pin 844 is inserted into the circular holes and the strip holes, the width of the strip holes is smaller than that of the circular holes, an annular groove 845 is arranged on the locking pin 844, the diameter of the locking pin 844 is smaller than or equal to the diameter of the circular holes and larger than that of the strip holes, the diameter of the groove bottom of the annular groove 845 is smaller than that of the strip holes, a fourth elastic unit 846 is arranged between the locking pin 844 and the lifting seat 82, the fourth elastic unit 846 is assembled to enable the elastic force of the fourth elastic unit 846 to drive the annular groove 845 of the locking pin 844 to be staggered with the circular holes and the circular holes along the axial direction of the locking pin 844, and the fourth elastic unit further comprises an unlocking driving mechanism which is assembled to enable the locking pin 844 to be driven to slide and enable the annular groove 845 to be flush with the circular holes and the circular holes when the lifting seat 82 is lifted to a specified position; the unlocking driving mechanism includes a lifting plate 832, an upper end of the locking pin 844 is provided to a radial flange, the top surface of the lifting plate 832 is blocked and connected with the bottom surface of the radial flange, the lifting plate 832 is fixed on the horizontal supporting block 83, the horizontal supporting block 83 is fixedly connected with the piston rod of the piston cylinder 86 vertically arranged on the fixed seat 81, the bottom surface of the horizontal supporting block 83 is blocked and connected with the top surface of the lifting seat 82, and a fifth elastic unit 821 is provided between the horizontal support block 83 and the elevation base 82, the fifth elastic unit 821 is assembled such that its elastic force can drive the elevation base 82 to move upward with respect to the horizontal support block 83, the fixed seat 81 is provided with a vertical guide post 811, the lifting seat 82 and the vertical guide post 811 form sliding fit, the top end of the vertical guide post 811 is provided with a convex ring, the bottom surface of the convex ring is blocked and connected with the top surface of the lifting seat 82, when the bottom surface of the convex ring is attached to the top surface of the lifting seat 82, the lifting seat 82 is just at the designated height; when piston cylinder 86 drive horizontal support block 83 went upward, horizontal support block 83 passed through fifth elastic element 821 and drives lift seat 82 and go upward in step, thereby lift seat 82 was blockked by the bulge loop and stops going upward when lift seat 82 kept off with vertical guide pillar 811 upper end bulge loop, thereby horizontal support block 83 can drive locking pin 844 when continuing to go upward and upwards slide for lift seat 82 and make annular groove 845 and round hole and a hole parallel and level, locking pin 844 loses the effect of blockking with slide 84 this moment, and then make slide 84 pop out under the spring action.

Specifically, the linkage resetting mechanism includes a wedge 842 arranged on the sliding seat 84 and a wedge driving block 812 arranged on the fixed seat 81, and the wedge 842 and the wedge driving block 812 are assembled such that when the lifting seat 82 moves downward, the wedge driving block 812 can extrude the wedge 842 and make the sliding seat 84 slide in a direction away from the end of the lifting seat 82 until the circular hole is opposite to the locking pin 844 in the vertical direction. When the horizontal supporting block 83 goes down, the locking pin 844 is released firstly, and at this time, because the locking pin 844 is located in the strip hole, the step surface of the annular groove 845 of the locking pin 844 abuts against the edge of the strip hole under the action of elastic force, and along with the continuous downward movement of the horizontal supporting block 83, the lifting seat 82 is driven to go down, at this time, the sliding seat 84 slides towards the direction far away from the edge of the lifting seat 82 under the action of the wedge-shaped block 842 and the wedge-shaped driving block 812, and when the circular hole is right opposite to the locking pin 844, the locking pin 844 is inserted into the circular hole under the action of the elastic force, and then the sliding seat 84 is.

Preferably, the second elastic unit 851, the third elastic unit 841, the fourth elastic unit 846 and the fifth elastic unit 821 are compression springs; the piston cylinder 86 is an air cylinder; the driving element 95 is an electric cylinder, and the push block 94 is fixed on a slide block of the electric cylinder.

Example 2

A method for processing an electric appliance box body shell by adopting the electric appliance shell forming system in embodiment 1 comprises the following steps:

step 1: conveying the cut and flanged metal plate 1 into a bending forming machine;

step 2: one bending unit 10 clamps the metal plate 1, the other bending unit 10 slides along the horizontal direction, and the distance between the two bending units 10 and the two ends of the metal plate 1 is sequentially adjusted by adopting the mode;

and step 3: the two bending units 10 respectively bend two ends of the metal plate 1 for the first time;

and 4, step 4: adjusting the distance between the two bending units 10 and the two ends of the metal plate 1 again by adopting the method in the step 2;

and 5: the two bending units 10 respectively bend the two ends of the metal plate 1 for the second time, so that the metal plate 1 has a rectangular box body with two top walls, two side walls and a bottom wall in the stroke;

and 8: inserting the clamping strips 91 on the two turned edges on the inner side of the seam of the top wall of the box body, and clamping and fixing the two turned edges by using the clamping strips 91;

in the steps 3 and 5, a cantilever supporting mechanism 20 is adopted to support at least one end of the metal plate 1 in the bending process;

in the step 6, the box body after bending forming is conveyed to a shaping station by a transfer mechanism;

in the step 8, the clamping strip 91 is inserted by the insertion mechanism 90.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are generally practiced in the art without specific recitation or limitation.

Claims

1. A method for processing an outer shell of an electric appliance box body is characterized by comprising the following steps: the method comprises the following steps:

step 1: conveying the cut and flanged metal plate (1) into a bending forming machine, wherein the bending forming machine comprises two bending units (10) which are arranged back to back, each bending unit (10) comprises a supporting platform (14), a pressing seat (12) and a bending roller (11), the supporting platform (14) is fixedly connected with a machine base, the pressing seat (12) is arranged on the supporting platform (14) in an opening and closing mode along the vertical direction, an inner module (13) is arranged at the bottom of the pressing seat (12), the inner module (13) is provided with an acute-angle corner, the bending roller (11) is arranged on the machine base in a swinging mode along an axis parallel to a self roller shaft, when the inner module (13) is pressed on the supporting platform (14), the vertex of the acute-angle corner is located on the swinging axis of the bending roller (11), the machine base is arranged on the machine base in a sliding mode along the horizontal direction, and the sliding direction of the machine base is perpendicular to the axis direction of the bending roller;

step 2: one bending unit (10) clamps the metal plate (1), the other bending unit (10) slides along the horizontal direction, and the distance between the two bending units (10) and the two ends of the metal plate (1) is sequentially adjusted by adopting the mode;

and step 3: the two bending units (10) respectively bend two ends of the metal plate (1) for the first time;

and 4, step 4: adjusting the distance between the two bending units (10) and the two ends of the metal plate (1) again by adopting the method in the step 2;

and 5: the two bending units (10) respectively bend two ends of the metal plate (1) for the second time, so that the metal plate (1) has a rectangular box body with two top walls, two side walls and a bottom wall in the stroke;

and 8: inserting the clamping strips (91) on the two flanges on the inner side of the seam of the top wall of the box body, and clamping and fixing the two flanges by using the clamping strips (91);

in the steps 3 and 5, a cantilever supporting mechanism (20) is adopted to support at least one end of the metal plate (1) in the bending process; the suspension wall supporting mechanism (20) comprises a first swing arm (21) and a second swing arm (22), one end of the first swing arm (21) is hinged with the rack, the other end of the first swing arm is hinged with one end of the second swing arm (22), hinged shafts at two ends of the first swing arm (21) are parallel to each other, and the suspension wall supporting mechanism further comprises a swing arm driving mechanism which is assembled to drive the second swing arm (22) to swing relative to the first swing arm (21) and drive the first swing arm (21) to swing relative to the rack; a clamping mechanism (30) is arranged at one end, far away from the first swing arm (21), of the second swing arm (22); the first swing arm (21) and the second swing arm (22) are positioned at the side of the bending unit (10), and the axis of a hinge shaft between the first swing arm (21) and the second swing arm (22) is arranged corresponding to a bending angle of the surface of the box body during first bending; the axis of a hinge shaft between the first swing arm (21) and the rack is arranged corresponding to a break angle when the surface of the box body is bent for the second time; when the bending unit (10) bends for the first time, the swing arm driving mechanism drives the second swing arm (22) to swing for 90 degrees, and when the bending unit (10) bends for the second time, the swing arm driving mechanism drives the first swing arm (21) to swing for 90 degrees;

in the step 7, the box body supporting mechanism comprises an outer supporting part (60) and an inner supporting part (80), the outer supporting part (60) comprises a horizontal top plate, the bottom surface of the horizontal top plate is attached to the top surface of the box body, two ends of the horizontal top plate are provided with extending parts which protrude downwards, and the extending parts are attached to the upper ends of two side walls of the box body; the inner supporting part (80) comprises a right-angle supporting block (85) which is abutted against the inner sides of the corners at the two ends of the top wall of the box body and a horizontal supporting block (83) which is abutted against the bottom surfaces at the two sides of the seam of the top wall of the box body; the right-angle supporting block (85) is movably arranged along the vertical direction and the horizontal direction, and the horizontal supporting block (83) is movably arranged along the vertical direction; the inner supporting part (80) further comprises a fixed seat (81) and a lifting seat (82), the lifting seat (82) is movably connected with the fixed seat (81) along the vertical direction, the right-angle supporting block (85) is movably connected with the lifting seat (82) along the horizontal direction and the vertical direction, a linkage mechanism is arranged between the right-angle supporting block (85) and the lifting seat (82), and the linkage mechanism is assembled to drive the right-angle supporting block (85) to be ejected upwards in an inclined mode towards two ends of the lifting seat (82) when the lifting seat (82) is lifted to a specified position relative to the fixed seat (81);

in the step 8, the clamping strip (91) is made of an elastic metal material, the clamping strip (91) comprises two symmetrically arranged clamping walls, one side of each clamping wall is connected into a whole through a connecting part, and the other sides of the two clamping walls are mutually furled.

2. The processing method of the outer shell of the electric appliance box body as claimed in claim 1, characterized in that: a linkage control mechanism is arranged between the first swing arm (21) and the second swing arm (22), the linkage control mechanism is assembled to enable the first swing arm (21) and the rack to be relatively static when the swing arm driving mechanism drives the second swing arm (22) to swing along a first direction, enable the second swing arm (22) and the first swing arm (21) to be relatively static when the swing arm driving mechanism drives the first swing arm (21) to swing along the first direction, and enable the second swing arm (22) to swing along a second direction relative to the first swing arm (21) when the swing arm driving mechanism drives the first swing arm (21) to swing along the second direction, and the first direction and the second direction are two rotating directions with parallel rotating axes and opposite rotating directions; the linkage control mechanism comprises a first rotating shaft (23) and a second rotating shaft (24) which are arranged in parallel, the first rotating shaft (23) and the second rotating shaft (24) are respectively and rotatably arranged at two ends of a first swing arm (21), the first rotating shaft (23) is connected with the first swing arm (21) through a first one-way bearing (233), and the second rotating shaft (24) and the first swing arm (21) form damping rotation fit; the first rotating shaft (23) is connected with the frame through a second one-way bearing (232), and the first one-way bearing (233) and the second one-way bearing (232) are assembled to enable the first rotating shaft (23) to rotate relative to the first swing arm (21) and the frame only along a first direction; a third rotating shaft (25) which is parallel to the first rotating shaft (23) and the second rotating shaft (24) is arranged on the first swing arm (21), a first chain wheel (231) is arranged on the first rotating shaft (23), a second chain wheel (251) is arranged on the third rotating shaft (25), the first chain wheel (231) is in transmission fit with the second chain wheel (251) through an annular chain (26), a first gear (252) which is synchronously and rotatably connected with the second chain wheel (251) is arranged on the third rotating shaft (25), a second gear (241) which is meshed with the first gear (252) is arranged on the second rotating shaft (24), a clutch mechanism is arranged between the second rotating shaft (24) and the second swing arm (22), the clutch mechanism is assembled to be separated when the swing arm driving mechanism drives the second swing arm (22) to swing, so that the second swing arm (22) and the second rotating shaft (24) form relative rotation fit, and the clutch mechanism is closed when the swing arm driving mechanism is separated from the second swing arm (22), the second swing arm (22) is synchronously and rotationally connected with the second rotating shaft (24); clutch device includes square shaft (242) with second pivot (24) rigid coupling to and picture peg (223) of setting on second swing arm (22) along the radial slip of second pivot (24), be equipped with U type groove on picture peg (223), the width in U type groove is unanimous with the width between the two-phase relative straight wall of square shaft (242), and second swing arm (22) and the synchronous normal running fit of second pivot (24) when U type groove is inserted on square shaft (242), second swing arm (22) and the relative normal running fit of second pivot (24) when U type slot breaks away from with square shaft (242).

3. The processing method of the outer shell of the electric appliance box body as claimed in claim 2, characterized in that: the swing arm driving mechanism comprises a driving shaft (27), the axis of the driving shaft (27) is parallel to the axes of the first rotating shaft (23) and the second rotating shaft (24), and the driving shaft (27) is movably arranged between the first rotating shaft (23) and the second rotating shaft (24); the end part of the driving shaft (27) is provided with a strip-shaped driving block (271) arranged along the radial direction of the driving shaft (27); a first meshing block (211) coaxial with the first rotating shaft (23) is arranged on the first swing arm (21), a second meshing block (221) coaxial with the second rotating shaft (24) is arranged on the second swing arm (22), a bar-shaped slot (212) matched with the bar-shaped driving block (271) is arranged on the end face of one side, opposite to the driving shaft (27), of the first meshing block (211), and a fan-shaped slot (242) matched with the bar-shaped driving block (271) is arranged on one side, opposite to the driving shaft (27), of the second meshing block (221); the driving shaft (27) is coaxially and fixedly connected with the swinging shaft of the bending roller (11); be equipped with first elastic element (225) between picture peg (223) and second swing arm (22), first elastic element (225) are assembled for its elasticity can drive the U type slot and the square shaft (242) of picture peg (223) and insert and close, still be equipped with cowl (224) on picture peg (223), can push away cowl (224) and make the U type slot and the square shaft (242) of picture peg (223) break away from when radial insertion fan-shaped slot (242) of second pivot (24) are followed in bar driving block (271).

4. The processing method of the outer shell of the electric appliance box body as claimed in claim 3, characterized in that: the transmission ratio between the first gear (252) and the second gear (241) is 1: 1; the transmission ratio between the first chain wheel (231) and the second chain wheel (251) is 1: 1; a first limiting block used for limiting the swing angle of the first swing arm (21) relative to the frame to be 0-90 degrees is arranged between the first swing arm (21) and the frame; and a second limiting block used for limiting the swing angle of the second swing arm (22) relative to the first swing arm (21) to be 0-90 degrees is arranged between the first swing arm (21) and the second swing arm (22).

5. The processing method of the outer shell of the electric appliance box body as claimed in claim 4, characterized in that: in the step 6, the box body after being bent and formed is conveyed to a forming station by adopting a transfer mechanism, the transfer mechanism comprises a discharging frame (40) and a discharging conveying roller (50), the transfer mechanism is positioned on one side, away from the suspended wall supporting mechanism (20), of the bending unit (10), the discharging frame (40) comprises a translation support (42) and a lifting support (43), the translation support (42) is movably arranged on a cross beam (41) along the direction parallel to the bending roller, the lifting support (43) is movably arranged on the translation support (42) along the vertical direction, a driving element (95) for driving the lifting support (43) to vertically move is arranged on the translation support (42), a fork wall (44) is arranged on the lifting support (43), the fork wall (44) is arranged in a manner of overhanging towards one side where the bending unit (10) is positioned, a plurality of fork walls (44) are arranged, and the fork walls (44) are respectively arranged below a top plate and a bottom plate of the box body after being formed, the overhanging section of the fork wall (44) is provided with a hook block (45) protruding upwards; two guard plates (46) which are arranged in parallel at intervals along the horizontal direction are further arranged on the lifting support (43), and the two guard plates (46) are respectively arranged corresponding to the outer sides of two side walls of the formed box body; the discharge conveyor roller (50) is located below the translation path of the translation carriage (42).

6. The processing method of the outer shell of the electric appliance box body as claimed in claim 1, characterized in that: in the step 8, the clamping strips (91) are inserted by an inserting mechanism (90), the inserting mechanism (90) comprises a feeding groove (92), a sliding groove (93) and a pushing mechanism, the feeding groove (92) is used for stacking the clamping strips (91) in parallel, and the two clamping walls of the clamping strips (91) have the closing ends facing upwards and are stacked in the feeding groove (92); the feeding mechanism comprises a feeding groove (92), a sliding groove (93), a clamping strip (91) at the lowest layer of the feeding groove (92) and a pushing block (94), wherein the sliding groove (93) is located below the feeding groove (92), the sliding groove (93) is arranged opposite to a seam area of the top wall of the box body along the width direction of the box body, the clamping strip (91) at the lowest layer of the feeding groove (92) can naturally fall into the sliding groove (93), the pushing mechanism comprises the pushing block (94) arranged in the sliding groove (93), and the pushing block (94) is driven by a driving element; the right-angle supporting block (85) is movably connected with the sliding seat (84) along the vertical direction, the sliding seat (84) is in sliding connection with the lifting seat (82) along the horizontal direction, a wedge-shaped surface (852) is arranged on the right-angle supporting block (85), wedge-shaped driving surfaces (822) are arranged at two ends of the lifting seat (82), and when the sliding seat (84) slides towards the end of the lifting seat (82), the wedge-shaped driving surfaces (822) extrude the wedge-shaped surface (852) to enable the right-angle supporting block (85) to be lifted upwards relative to the sliding seat (84); a second elastic unit (851) is arranged between the right-angle supporting block (85) and the sliding seat (84), the second elastic unit (851) is assembled in a way that the elastic force of the second elastic unit can drive the right-angle supporting block (85) to move downwards relative to the sliding seat (84), and the right-angle supporting block (85) moves downwards relative to the sliding seat (84) under the action of the second elastic unit (851) when the sliding seat (84) slides in a direction away from the end part of the lifting seat (82); a third elastic unit (841) is arranged between the sliding seat (84) and the lifting seat (82), the third elastic unit (841) is assembled to enable the sliding seat (84) to slide towards the end part of the lifting seat (82) under the action of elastic force, a locking mechanism is further arranged between the sliding seat (84) and the lifting seat (82), the locking mechanism is assembled to enable the sliding seat (84) to be locked at a station far away from the end part of the lifting plate (832) when the sliding seat (84) is at the station, and the locking mechanism can release the sliding seat (84) to enable the sliding seat (84) to slide towards the end part of the lifting seat (82) under the action of the third elastic unit (841) when the lifting seat (82) is lifted to a specified height; and the linkage resetting mechanism is assembled to drive the sliding seat (84) to slide from the end part of the lifting seat (82) to the inner side of the lifting seat (82) to the working position far away from the end part of the lifting plate (832) when the lifting seat (82) moves downwards from the specified height.

7. The processing method of the outer shell of the electric appliance box body as claimed in claim 6, characterized in that: the locking mechanism comprises a round hole and a strip hole which are formed in the sliding seat (84) and are communicated with each other, and a locking pin (844) which is arranged on the lifting seat (82) in a sliding mode along the vertical direction, wherein the locking pin (844) is inserted into the round hole and the strip hole, the width of the strip hole is smaller than the diameter of the round hole, an annular groove (845) is formed in the locking pin (844), the diameter of the locking pin (844) is smaller than or equal to the diameter of the round hole and larger than the width of the strip hole, the diameter of the bottom of the annular groove (845) is smaller than the, a fourth elastic unit (846) is arranged between the locking pin (844) and the lifting seat (82), the fourth elastic unit (846) is assembled to be a structure that the elastic force of the fourth elastic unit (846) can drive the annular groove (845) of the locking pin (844) to be staggered with the circular hole and the circular hole along the axial direction of the locking pin (844), and the fourth elastic unit further comprises an unlocking driving mechanism, and the unlocking driving mechanism is assembled to be capable of driving the locking pin (844) to slide and enabling the annular groove (845) to be flush with the circular hole and the circular hole when the lifting seat (82) is lifted to a specified position; the unlocking driving mechanism comprises a lifting plate (832), the upper end of a locking pin (844) is arranged on a radial flange, the top surface of the lifting plate (832) is in blocking connection with the bottom surface of the radial flange, the lifting plate (832) is fixed on a horizontal supporting block (83), the horizontal supporting block (83) is fixedly connected with a piston rod of a piston cylinder (86) vertically arranged on a fixed seat (81), the bottom surface of the horizontal supporting block (83) is in blocking connection with the top surface of a lifting seat (82), a fifth elastic unit (821) is arranged between the horizontal supporting block (83) and the lifting seat (82), the fifth elastic unit (821) is assembled to enable the elastic force of the fifth elastic unit to drive the lifting seat (82) to move upwards relative to the horizontal supporting block (83), a vertical guide pillar (811) is arranged on the fixed seat (81), the lifting seat (82) is in sliding fit with the vertical guide pillar (811), and a convex ring is arranged at the, the bottom surface of the convex ring is blocked and connected with the top surface of the lifting seat (82), and the lifting seat (82) is just positioned at the designated height when the bottom surface of the convex ring is attached to the top surface of the lifting seat (82); when the piston cylinder (86) drives the horizontal supporting block (83) to move upwards, the horizontal supporting block (83) drives the lifting seat (82) to move upwards synchronously through the fifth elastic unit (821), when the lifting seat (82) is blocked and connected with a convex ring at the upper end of the vertical guide pillar (811), the lifting seat (82) is blocked by the convex ring to stop moving upwards, and when the horizontal supporting block (83) continues to move upwards, the locking pin (844) can be driven to slide upwards relative to the lifting seat (82), so that the annular groove (845) is flush with the circular hole and the strip hole; the linkage resetting mechanism comprises a wedge block (842) arranged on a sliding seat (84) and a wedge driving block (812) arranged on a fixed seat (81), wherein the wedge block (842) and the wedge driving block (812) are assembled to extrude the wedge block (842) and enable the sliding seat (84) to slide until a round hole is aligned to a vertical direction along with a locking pin (844) when the lifting seat (82) moves downwards, and the wedge driving block (812) is far away from the end part of the lifting seat (82).

8. The processing method of the outer shell of the electric appliance box body as claimed in claim 7, characterized in that: the box body is characterized by further comprising a blocking wall (70), wherein the blocking wall (70) is positioned on one side which is adjacent to the side wall, the bottom wall and the top wall of the box body at the same time, one side of the horizontal top plate, which is far away from the blocking wall (70), is provided with a blocking strip which protrudes downwards, and the blocking strip is blocked and connected with a flanging on one side, which is far away from the blocking wall (70), of the top wall of the box body; the baffle wall (70) is fixedly arranged on the rack, the external support and the internal support are both arranged on a movable support (96), and the movable support (96) is movably arranged on the rack along the width direction of the box body; the inserting mechanism (90) is positioned on one side of the box body, which is far away from the blocking wall (70), and the inserting mechanism (90) is installed on the movable support (96).

9. The processing method of the outer shell of the electric appliance box body as claimed in claim 8, characterized in that: an avoiding groove (831) is formed in the position, corresponding to the seam of the top wall of the box body, of the horizontal supporting block (83), and when the horizontal supporting block (83) is attached to the bottom surface of the top wall of the box body, the avoiding groove (831) is in butt joint with the sliding groove (93) to form a channel for the clamping strip (91) to slide; a wedge block (97) is arranged in a butt joint area of the avoiding groove (831) and the sliding groove (93), the width of one end, close to the sliding groove (93), of the wedge block (97) is larger than that of one end, close to the avoiding groove (831), of the wedge block (97), one end, facing the sliding groove (93), of the wedge block (97) is in an arrow shape, the vertex of the arrow is located on the central line of the clamping strip (91), and when the clamping strip (91) passes through the wedge block (97), the wedge block (97) can prop open two clamping walls of the clamping strip (91); the wedge block (97) is fixedly connected with the groove wall of the avoidance groove (831) or the sliding groove (93).

10. The processing method of the outer shell of the electric appliance box body as claimed in claim 9, characterized in that: the second elastic unit (851), the third elastic unit (841), the fourth elastic unit (846) and the fifth elastic unit (821) are all compression springs; the piston cylinder (86) is a cylinder; the driving element (95) is an electric cylinder, and the push block (94) is fixed on a sliding block of the electric cylinder.