CN115319474A

CN115319474A - Top skin processingequipment

Info

Publication number: CN115319474A
Application number: CN202211108657.0A
Authority: CN
Inventors: 洪新东; 邹湘衡; 陈波; 张鹏
Original assignee: Changsha Hengkai Intelligent Technology Co ltd
Current assignee: Changsha Hengkai Intelligent Technology Co ltd
Priority date: 2022-09-13
Filing date: 2022-09-13
Publication date: 2022-11-11
Anticipated expiration: 2042-09-13
Also published as: CN115319474B

Abstract

The invention provides a top skin processing device. The top skin processingequipment includes decoiler, welding host computer, blank pressing machine, plate shearing machine and the unloading transfer chain that sets gradually from the feeding to ejection of compact direction, the decoiler is used for carrying first and second top skin to the welding host computer, and the welding host computer is used for welding first top skin and second top skin interval and sets up the welding seam that forms and obtain welding top skin, and the blank pressing machine is used for carrying out the blank pressing to the edge at welding top skin both ends, and the plate shearing machine is used for behind the blank pressing welding top skin cuts off according to predetermineeing length and obtains target welding top skin, and the unloading transfer chain is used for carrying target welding top skin to next station. The top skin processing device provided by the invention can continuously complete the work of welding, edge pressing and cutting, has high working efficiency and good welding and edge pressing quality, and can greatly improve the existing processing technology of the top skin.

Description

Top skin processingequipment

Technical Field

The invention belongs to the technical field of top skin machining, and particularly relates to a top skin machining device.

Background

In recent decades, in the development of the passenger car manufacturing industry in China, the shape, the structure, the variety, the grade and the like of a client product are greatly improved, but in the manufacturing process, most passenger car manufacturers still adopt the traditional technological method to carry out production and are limited by the specification of equipment, and the problems of backward process, low efficiency, unstable quality, high labor intensity and the like exist in the existing top skin processing.

Because top covering width broad, integrated into one piece is comparatively difficult, mainly adopt concatenation welded mode at present, the top covering after the welding needs to roll the muscle and increase its intensity, its both sides need the hem, the border of passenger train top covering just can weld on the side wall skeleton like this, to the processing of passenger train top covering, roll the muscle on the muscle equipment of rolling earlier usually, then to the hem on the hem equipment, and in the hem, need the manual work to fix a position passenger train top covering, in order to prevent the position deviation of the muscle on the top covering behind the hem. At present, welding and edge pressing equipment are separately arranged, and the splicing welding mode in the prior art still has the defects of uncontrollable production quality and non-repeatable batch production; the blank pressing equipment has the defects of complicated working process and ineffective control of the processing precision.

Disclosure of Invention

The invention aims to provide a processing device for processing a top skin, which has the advantages of good welding quality, high edge pressing precision and the like and aims to overcome the problems in the prior art.

In order to achieve the purpose, the invention provides a top skin processing device which comprises an uncoiler, a welding host, a blank holder, a plate shearing machine and a blanking conveying line which are sequentially connected in the feeding-discharging direction, wherein:

the welding host is used for welding two first top skins and two second top skins which are arranged side by side at intervals and form welding seams, and comprises a supporting mechanism, a conveying roller way, a first driving mechanism and a welding mechanism, wherein the conveying roller way, the first driving mechanism and the welding mechanism are installed on the supporting mechanism; wherein: the method comprises the following steps that along a first direction, the conveying roller ways are divided into a left conveying roller way for conveying a first top skin and a right conveying roller way for conveying a second top skin, along a second direction, the conveying roller ways comprise a plurality of first conveying rollers, a plurality of second conveying rollers and a plurality of third conveying rollers which are sequentially arranged, and the first direction is vertical to the second direction; the first driving mechanism is connected with the second conveying roller and is used for driving the second conveying roller to rotate; the welding mechanism is arranged above the second conveying roller and used for welding the welding line to obtain a welding top skin;

the number of the uncoilers is two, wherein one uncoiler is used for conveying the first top skin to the left side conveying roller way, and the other uncoiler is used for conveying the second top skin to the right side conveying roller way;

the edge pressing machine is positioned at one end, far away from the uncoiler, of the third conveying roller, is used for pressing edges of two ends of the welding top skin, and comprises a base, a material supporting roller assembly, two edge pressing mechanisms and a second driving mechanism, wherein the material supporting roller assembly is mounted on the base, the two edge pressing mechanisms are respectively arranged on two sides of the material supporting roller assembly, the second driving mechanism is used for driving the edge pressing mechanisms to work, and the edge pressing mechanisms are used for pressing the edges of the welding top skin into a target shape;

the plate shearing machine is used for cutting off the welded top skin after edge pressing according to a preset length to obtain a target welded top skin;

and the blanking conveying line is used for conveying the cut target welding top skin to the next station.

In one specific embodiment, the uncoiler includes a frame, a feed drum mounted to the frame, an expansion sleeve mounted to the center of the feed drum, and a pneumatic pressure roller assembly connected to the frame and abutting the surface of the feed drum.

In a specific implementation mode, the supporting mechanism includes a base, two sets of first support piece, two sets of second support piece and two sets of third support piece that set up symmetrically that extend towards keeping away from the upper surface of base direction, and with the top frame that the relative interval of base set up, the both ends of top frame are connected with two sets of second support piece respectively, the base including be used for supporting first support piece, second support piece with third support piece's first base and with the second base that first base set up side by side, first actuating mechanism install in the second base.

In a specific embodiment, the intermediate position of the first nip roller and the second nip roller of the second transport rollers has a gap matching the weld; welding mechanism including all install in the wire reel of top frame, send a machine, two inter block interval set up compress tightly the subassembly and locate two compress tightly between the subassembly and be located the laser welder head of gap top, the wire reel is used for the storage welding wire, send a machine be used for with the welding wire of wire reel is carried extremely the welding seam, the laser welder head be used for sending laser beam and throw in the welding seam, compress tightly the subassembly include with the top frame is connected and the cover is located first the epaxial bearing in center of the first clamp roller of second transportation roller, locate the bearing inboard and with the linking bridge that the bearing is connected and install in linking bridge keeps away from the ramp plate of bearing one side, ramp plate is used for pushing down the top covering.

In a specific embodiment, the number of the second transportation rollers is two, and the first driving mechanism comprises a central shaft which is positioned between the two second transportation rollers and is arranged on the second supporting piece, a central gear which is arranged on the central shaft, two groups of driven gears which are in meshed connection with the central gear, and a welding power assembly which is used for driving the central shaft to rotate; every the second transportation roller corresponds a set of driven gear, every group driven gear including install in the first driven gear of the center pin of the first double-layered roller of second transportation roller with install in the second driven gear of the center pin of the second double-layered roller of second transportation roller, the second driven gear with the sun gear meshing is connected, first driven gear with the second driven gear meshing is connected, welding power component drive the center pin rotates, the center pin drives sun gear rotates, sun gear drives and is located its both sides and rather than two that the meshing is connected the second driven gear rotates, the second driven gear drives rather than the meshing is connected first driven gear rotates, thereby the drive the second transportation roller rotates.

In a specific implementation manner, the welding power assembly includes a first motor fixed to the second base, a first speed reducer in transmission connection with the first motor, a first driving wheel mounted on an output shaft of the first speed reducer, a first sprocket mounted on the second base and spaced from the first driving wheel, and a first chain surrounding the first driving wheel and the first sprocket, the first sprocket is mounted on the central shaft and spaced from the central gear, the first motor drives the first speed reducer, the first speed reducer drives the first driving wheel, the first driving wheel drives the first sprocket to rotate through the first chain, and the first sprocket drives the central shaft to rotate.

In a specific implementation manner, the welding host further includes an adjusting mechanism set disposed corresponding to the first transportation roller and the third transportation roller, the adjusting mechanism set includes two first adjusting mechanisms symmetrically disposed, each first adjusting mechanism includes an installation column fixedly connected to the first base and a first rotary screw rod disposed on the installation column, and the two top skins are sandwiched between the two first rotary screw rods of the adjusting mechanism set.

In a specific embodiment, the edge pressing mechanism comprises a sliding plate which is slidably mounted on the base, an extending plate which extends from the sliding plate to the direction away from the base, and a plurality of edge pressing components which are arranged on the extending plate at intervals; the edge pressing component comprises a first edge pressing roller and a second edge pressing roller, the first edge pressing roller and the second edge pressing roller are arranged at intervals to form gaps for clamping the top skin, and the second driving mechanism is installed on the sliding plate and connected with the first edge pressing roller and the second edge pressing roller.

In a specific implementation manner, the beading machine further comprises a hand-operated screw rod assembly for driving the sliding plate to slide, the hand-operated screw rod assembly comprises a screw rod unit, two sliding rails respectively arranged at two sides of the screw rod unit, and a sliding block which is arranged on the sliding rails and can slide along the sliding rails, and the sliding block is fixedly connected with the sliding plate.

In a specific implementation manner, the second driving mechanism comprises a blank pressing power assembly for providing power, two gear assemblies arranged corresponding to the two blank pressing mechanisms, and a power transmission assembly of which two ends are respectively connected with the two gear assemblies to transmit power, wherein the blank pressing power assembly is connected with one of the gear assemblies and transmits the power to the other gear assembly through the power transmission assembly;

the gear assembly comprises N gear sets, transmission gears which are positioned between every two adjacent gear sets and are in meshed connection with the two adjacent gear sets, and a first transmission shaft and a second transmission shaft which are arranged on the base, the gear sets comprise two first gears and two second gears which are in meshed connection, the first gears are arranged on the shafts of the first edge pressing rollers, the second gears are arranged on the shafts of the second edge pressing rollers, the second gears are in meshed connection with the transmission gears, the number of the transmission gears is N-1, one of the transmission gears is connected with the power assembly, and N is an integer larger than 2; n-1 transmission gears are respectively arranged on the first transmission shaft and the second transmission shafts; the first transmission shaft is a telescopic transmission shaft, and the first transmission shaft of one of the gear assemblies is connected with the power assembly.

The beneficial effects of the invention at least comprise:

1. the invention provides a top skin processing device which comprises an uncoiler, a welding host, a blank holder, a plate shearing machine and a blanking conveying line which are sequentially arranged from a feeding direction to a discharging direction, wherein the welding host comprises a supporting mechanism, a conveying roller way, a first driving mechanism and a welding mechanism, the conveying roller way is arranged on the supporting mechanism and comprises a first conveying roller, a second conveying roller and a third conveying roller, the first conveying roller, the second conveying roller and the third conveying roller are sequentially arranged along the feeding direction to the discharging direction, the second conveying roller is arranged on a welding area, the first driving mechanism is connected with the second conveying roller, and the welding mechanism is arranged on the welding area; the edge pressing machine comprises a base, a material supporting roller assembly arranged on the base, two edge pressing mechanisms arranged on two sides of the material supporting roller assembly respectively, and a second driving mechanism used for driving the edge pressing mechanisms to work, wherein the edge pressing mechanisms are used for pressing the edge of the welding top skin into a target shape; like this, send first top covering and second top covering to the first transportation roller of welding host computer through the decoiler, get into the third transportation roller after the welding is accomplished, then reentry the beading machine carries out the blank pressing to the welding top covering that obtains after the welding, cuts off through the plate shearing machine after the blank pressing is accomplished and obtains target welding top covering, and target welding top covering is carried to next station through the unloading transfer chain, can accomplish the work of welding, blank pressing and cutting off in succession through a covering processingequipment, and work efficiency is high, and welding, blank pressing are of high quality, can improve the processing technology of current top covering greatly.

2. The edge pressing mechanism comprises an extension plate and a plurality of edge pressing components, wherein the extension plate is slidably mounted on the base sliding plate, the extension plate extends from the sliding plate to the direction far away from the base, and the edge pressing components are arranged on the extension plate at intervals; therefore, because the sliding plate is slidably mounted on the base, the distance between the two edge pressing mechanisms can be adjusted, the top skin with different width sizes can be compatible, and the production cost is reduced.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.

Drawings

Fig. 1 is a schematic perspective view of an angle of a top skin processing apparatus according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of an angle of an uncoiler of the top skin processing apparatus according to an embodiment of the present invention;

fig. 3 is a schematic perspective view of a welding main machine of the top skin processing apparatus according to an embodiment of the present invention;

FIG. 4 is an enlarged view of portion A of FIG. 3;

fig. 5 is a schematic perspective view of another angle of the welding host of the top skin processing apparatus according to an embodiment of the present invention;

fig. 6 is a front view of a welding host of the top skin processing apparatus according to an embodiment of the present invention;

FIG. 7 is an enlarged view of portion B of FIG. 6;

fig. 8 is a schematic partial structural view of a welding area of a welding host of the top skin processing apparatus according to an embodiment of the present invention;

FIG. 9 is a schematic view of an angle of a blankholder of a top skin processing apparatus according to an embodiment of the present invention;

FIG. 10 is an enlarged view of portion C of FIG. 9;

fig. 11 is a schematic front view illustrating the connection of the slide plate of the edger of the top skin processing apparatus to other components according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram illustrating a connection between a sliding plate and a hand screw assembly of a beader of the top skin processing apparatus according to an embodiment of the present invention;

FIG. 13 is a schematic illustration of a perspective view of an adjustable blankholder module of a blankholder of a top skin processing apparatus according to an embodiment of the present disclosure;

FIG. 14 is a cross-sectional view of the adjustable hold-down die set of FIG. 13;

FIG. 15 is a schematic diagram of a portion of the adjustable hold-down die set shown in FIG. 13.

Description of the reference numerals:

Detailed Description

Embodiments of the invention will be described in detail below with reference to the accompanying drawings, but the invention can be defined and covered by the claims in many different embodiments.

Referring to fig. 1, the present invention provides a top skin processing apparatus 100, configured to weld two first top skins and two second top skins that are arranged side by side at an interval and form a weld, and perform edge pressing and cutting separation on the welded top skins to obtain target welded top skins that meet technical indexes.

The top skin processing device 100 comprises an uncoiler 10, a welding host 20, a beading machine 30, a plate shearing machine 40 and a blanking conveying line 50 which are sequentially arranged in the direction from feeding to discharging, wherein the uncoiler 10 is used for providing a first top skin and a second top skin, the welding host 20 is used for welding a welding seam and obtaining a welding top skin, the beading machine 30 is used for pressing the edge of the welding top skin into a target shape, the plate shearing machine 40 is used for cutting the welding top skin after beading according to a preset length to obtain a target welding top skin, and the blanking conveying line 50 is used for conveying the target welding top skin to a next station.

Referring to fig. 2, the number of the uncoilers 10 is two, wherein one uncoiler is used for conveying the first top skin, and the other uncoiler is used for conveying the second top skin. The uncoiler 10 comprises a frame 11, a feed drum 12 mounted on the frame 11, an expansion sleeve assembly 13 mounted at the center of the feed drum 12, and a pneumatic pressure roller device 14 connected with the frame 11 and abutted against the surface of the feed drum 12.

The top skin is fixed by adopting the expansion sleeve assembly, and the central mandrel of the expansion sleeve assembly rotates to drive the connecting rod mechanism to be unfolded so as to be compatible with the top skins of different specifications.

In the embodiment, the expansion sleeve mechanism adopts a manual expansion mode, the diameter expansion and contraction range is phi 450-phi 550, and the coil stock can be prevented from being unwound by arranging the pneumatic compression roller device 14.

Referring to fig. 3 to 8, the welding host 20 includes a supporting mechanism 21, a conveying roller 22, a first driving mechanism 23, a welding mechanism 24, and a first spiral elevator 25. The supporting mechanism 21 plays a role in supporting and fixing other components, the transportation roller way 22 is used for transporting a first top skin and a second top skin simultaneously, the first driving mechanism 23 is used for driving the transportation roller way 22, the welding mechanism 24 is used for welding the welding seam, and the first spiral elevator 25 is used for adjusting the distance between an upper clamping roller and a lower clamping roller of the transportation rail 22.

The supporting mechanism 21 includes a base 211, two sets of symmetrically arranged first supporting members 212, two sets of symmetrically arranged second supporting members 213, two sets of symmetrically arranged third supporting members 214, and a top frame 215 opposite to the base 211, wherein the two sets of symmetrically arranged first supporting members 212, the two sets of symmetrically arranged second supporting members 213, and the two sets of symmetrically arranged third supporting members 214 extend from the upper surface of the base 211 to the direction away from the base 211, and two ends of the top frame 215 are respectively connected with the two sets of second supporting members 213.

The base 211 includes a first base 2111 for supporting the first support 212, the second support 213, and the third support 214, and a second base 2112 arranged side by side with the first base 2111, and the first driving mechanism 23 is mounted on the second base 2112.

The base 211 mainly plays a supporting role, and the structure of the base is not limited, so that other elements such as the transport roller 22 and the first driving mechanism 23 can be stably supported.

The first support 212, the second support 213 and the third support 214 are arranged at intervals along the top skin transport direction, and are used for installing the transport roller way 22. In the present embodiment, the number of the first supporting members 212 per group is three, the number of the second supporting members 213 per group is one, and the number of the third supporting members 214 per group is three. The first support 212 includes a column 2121 fixedly connected to the base 211, a first mounting plate 2122 fixed to a side of the column 2121 away from the base 211, a side plate 2123 extending from the first mounting plate 2122 in a direction away from the column 2121, and a second mounting plate 2124 disposed opposite to the first mounting plate 2122 and fixedly connected to the side plate 2123.

The second supporting member 213 is a bearing plate, and is used for mounting the driving mechanism 23 and the conveying roller table 22. In this embodiment, the height of the second supporting member 213 is greater than the sum of the heights of the upright 2121 and the side plate 2123, that is, the upper surface of the second supporting member 213 and the upper surface of the second mounting plate 2124 are located on different planes, and the upper surface of the second supporting member 213 is higher than the upper surface of the second mounting plate 2124.

The third support 214 and the first support 212 are identical in structure. The structure is the same, meaning that the third 213 also includes a column fixedly connected to the base 11, a first mounting plate fixed to a side of the column away from the base 11, a side plate extending from the first mounting plate in a direction away from the column, and a second mounting plate disposed opposite to the first mounting plate and fixedly connected to the side plate, and no reference numeral is described here.

The top frame 215 comprises a cross beam 2151, two ends of which are respectively arranged on the two second supporting members 213, a cover plate 2152 which is covered at one end of the cross beam 2151 and is arranged opposite to the second supporting members, a dust-proof plate 2153 which is covered above the second transportation roller 222 of the transportation roller table 22 and is connected with the cover plate 2152, a cover plate 2154 which is positioned at one side of the dust-proof plate 2153 close to the second transportation roller 222 and is connected with the dust-proof plate 12153, and a supporting plate 2155 which is connected with the cover plate 2154 and the cross beam 2151; the cover plate 2152 is located below the dust-proof plate 2153, the cover plate 2154 is clamped between the dust-proof plate 2153 and the support plate 2155, the number of the second supporting members 213 is two, and correspondingly, the number of the cover plate 2152, the number of the dust-proof plate 2153, the number of the cover plate 2154 and the number of the support plate 2155 are two and are arranged at intervals.

Along first direction, the transportation rollgang 22 is distinguished to be divided into the left side transportation rollgang of carrying first top skin and the right side transportation rollgang of carrying second top skin, along the second direction, the transportation rollgang 22 is including the first transportation roller 221, the second that set gradually fortune rollgang 222 and third transportation roller 223, first direction with second direction mutually perpendicular, in this embodiment, first direction is the width direction that fig. 1 shows, the second direction is that fig. 1 shows length side is the same.

The first conveying roller 221, the second conveying roller 222 and the third conveying roller 223 comprise a first clamping roller and a second clamping roller which are arranged at intervals up and down, and two first top skins and two second top skins to be welded are clamped between the first clamping roller and the second clamping roller and move simultaneously.

The transport table 22 serves for positioning and guiding.

In this embodiment, the number of the first transportation rollers 221 is three, the number of the second movable transportation rollers 222 is two, the number of the third transportation rollers 223 is three, and the three first transportation rollers 221, the two second transportation rollers 222, and the three third transportation rollers 223 are sequentially arranged along the feeding and discharging direction, so as to form the transportation roller table 22 for transporting the top skin to complete feeding, welding, and discharging of the welding host 20.

Both ends of the first transportation roller 221 are respectively mounted to the side plates 2123 of the first support member 212, both ends of the second transportation roller 222 are respectively mounted to the second support member 213, and both ends of the third transportation roller 23 are respectively mounted to the side plates of the third support member 214.

Preferably, the first and second rollers of the first, second and

third transport rollers

221, 222 and 223 are provided with concave seams 224 formed by inward sinking from the outer surface, the concave seams 224 match with the welding seam, and the welding can be ensured to be smoother by arranging the concave seams 224. The matching of the concave seam 224 and the weld seam does not mean that the width of the concave seam is the same as the width of the weld seam, but means that the two are matched in position (the orthographic projection of the weld seam to the base completely falls into the concave seam), the width of the weld seam is smaller than or equal to the width of the concave seam 224, in the embodiment, the width of the weld seam is smaller than 0.5mm, and the width of the concave seam 24 is preferably 0.5mm.

Preferably, the transportation roller table 22 further includes a protective shell 225 covering the first nip roller of the first transportation roller 221 and the third transportation roller 223, and the protective shell 225 is fixedly connected to the second mounting plate of the first support member 212 or the second mounting plate of the third support member 214. The protective shell 225 can protect the dust and other impurities from falling into the roller way 20 and prevent the dust and other impurities from affecting the operation of the roller way, and can also protect the safety of operators.

The first driving mechanism 23 comprises a central shaft 231 which is positioned between the two second transportation rollers 222 and is arranged on the second support 213, a central gear 232 which is arranged on the central shaft 231, two groups of driven gears 233 which are in meshed connection with the central gear 232, and a welding power assembly 234 which is used for driving the central shaft 231 to rotate; each second transportation roller 222 corresponds to a group of driven gears 233, each group of driven gears 233 comprises a first driven gear 2331 mounted on the shaft of the first pinch roller of the second transportation roller 222 and a second driven gear 2332 mounted on the shaft of the second pinch roller of the second transportation roller 222, the second driven gear 2332 is in meshed connection with the central gear 232, the first driven gear 2331 is in meshed connection with the second driven gear 2332, the welding power assembly 234 drives the central shaft 231 to rotate, the central shaft 231 drives the central gear 232 to rotate, the central gear 232 drives two second driven gears 2332 which are positioned at two sides of the central gear and in meshed connection with the central gear 232 to rotate, and the second driven gear 2332 drives the first driven gear 2331 which is in meshed connection with the central gear to rotate.

In this embodiment, the central shaft 231 is installed at the second support 213 near the second base 2112, the central shaft 231 passes through the second support 213, and the central gear 232 is installed at one end of the central shaft 231 near the second base 2112.

The number of the sun gear 232 is one, the number of the first driven gear 2331 and the number of the second driven gear 2332 are four, each of the second transport rollers 222 is provided with two first driven gears 2331 and two second driven gears 2332, specifically, two ends of a first pinch roller of the second transport roller 222 are provided with one first driven gear 2331, and two ends of a second pinch roller of the second transport roller 222 are provided with one second driven gear 2332.

The welding power assembly 234 includes a first motor 2341 fixed on the second base 2112, a first speed reducer 2342 in transmission connection with the first motor 2341, a first driving wheel 2343 installed on an output shaft of the first speed reducer 2342, a first chain wheel 2344 installed on the central shaft 231 and arranged at an interval with the first driving wheel 2343, and a first chain 2345 surrounding the first driving wheel 2343 and the first chain wheel 2344, wherein the first motor 2341 drives the first speed reducer 2342, the first speed reducer 2342 drives the first driving wheel 2343, the first driving wheel 2343 drives the first chain wheel 2344 to rotate through the first chain 2345, and the first chain wheel 2344 drives the central shaft 231 to rotate.

In this embodiment, the first chain wheel 2344 is disposed on the side of the central gear 232 away from the second supporting member 213, that is, the central gear 232 is located between the second supporting member 213 and the first chain wheel 2344.

The first drive mechanism 23 operates as follows: the first motor 2341 drives the first speed reducer 2342, the first speed reducer 2342 drives the first driving wheel 2343, the first driving wheel 2343 drives the first chain wheel 2344 through the first chain 2345, the first chain wheel 2344 drives the central gear 232 through the central shaft 231, the central gear 232 drives the second driven gear 2332, and the second driven gear 2332 drives the first driven gear 2331; the first driven gear 2331 is mounted on the shaft of the first nip roller of the second transport roller 222, and the second driven gear 2332 is mounted on the shaft of the second nip roller of the second transport roller 222, so that the second transport roller 222 can be driven.

The welding mechanism 24 includes a wire reel 241, a wire feeder 242, two sets of pressing assemblies 243 spaced apart from each other, and a laser welding head 244 disposed between the two pressing assemblies 243 and above the weld joint, all of which are mounted to the top frame 215.

The wire reel 241 is used for storing welding wire and is connected to the wire feeder 242 through the welding wire, and in this embodiment, the wire reel 241 is mounted on the support plate 2155 of the top frame 214.

The wire feeder 242 is used for feeding the welding wire from the wire reel 241 to the welding seam, and in this embodiment, the wire feeder 242 is mounted on the support plate 2155 of the top frame 215.

The pressing assembly 243 includes a bearing 2431 connected to the cover plate 2154 and sleeved on the shaft of the first clamping roller of the first one of the second transportation rollers, a connecting bracket 2432 disposed inside the bearing 2431 and connected to the bearing 2431, and a slanted pressing plate 2433 installed at a side of the connecting bracket 2432 away from the bearing 2431, wherein the slanted pressing plate 2433 is used for pressing the first top skin and the second top skin. In the present embodiment, the first one of the second transport rollers 222 refers to a second transport roller closer to the first transport roller 221 of the two second transport rollers 222.

In the welding process, the two inclined pressing plates 2433 are respectively abutted against two sides of the welding line, so that the workpiece is prevented from being warped and deformed in the welding process.

In this embodiment, the welding mechanism 24 is a laser wire filler welder, and in other embodiments, the laser wire filler welder may be replaced with a MIG welder.

The first screw elevator 25 is connected to the first nip roller of the second power transmission roller 222, and is used for adjusting the gap width between the first nip roller and the second nip roller of the second transmission roller 222. Two ends of the second transportation roller 222 are respectively provided with the first spiral lifters, meanwhile, the middle part of the first transportation roller 222 is provided with the two first spiral lifters which are symmetrically arranged, and the first spiral lifter arranged at the middle part and the first spiral lifter arranged at the adjacent end part share one hand handle.

Preferably, the welding host 20 further includes an adjusting mechanism set for guiding and positioning, the adjusting mechanism set includes two first adjusting mechanisms 26 symmetrically arranged, and the first top skin and the second top skin are sandwiched between the two first adjusting mechanisms 26. Two adjacent first conveying rollers 221 and two adjacent third conveying rollers 223 are respectively provided with one first adjusting mechanism group therebetween. In this embodiment, the number of the first transportation roller 221 and the third transportation roller 223 is three, and accordingly, the number of the first adjusting mechanism groups corresponding to the first transportation roller 221 is two, and the number of the first adjusting mechanism groups corresponding to the third transportation roller 223 is two.

The first adjusting mechanism 26 includes a mounting column 261 fixedly connected to the first base 211 and located outside the upright 2121, and a first rotating screw 262 fixedly connected to the mounting column 261, and a first top skin and a second top skin arranged side by side are sandwiched between the side catch wheels of the two first rotating screws 262. The first top skin and the second top skin of different widths can be compatible by adjusting the first rotary screw 262.

Referring to fig. 9 to 15, the edge pressing machine 30 includes a base 31, a material supporting roller assembly 32, an edge pressing mechanism 33, a hand screw assembly 34, a second driving mechanism 35, a second screw elevator 36, a second adjusting mechanism 37, a pressing cylinder assembly 38, and an adjustable edge pressing module 39.

The base 31 supports and mounts other elements, and the specific structure is not limited, and in this embodiment, the base 31 is a frame-shaped structure.

The material supporting roller assembly 32 comprises two rows of supporting columns 321 which are arranged at intervals and fixedly connected with the base 31 and two groups of material supporting rollers 322 which are respectively arranged at two rows of supporting columns 321 far away from one end of the base 31, the number of the supporting columns 321 is two, the number of the material supporting rollers 322 is two, namely, each row of the supporting columns 321 supports one group of the material supporting rollers 322, and a welding top skin is transported to the next station through the material supporting rollers 22.

The material supporting roller 322 comprises a first part material supporting roller 3221 located in a feeding area of the beading machine 30 and a second part material supporting roller 3222 located in a beading area of the beading machine 30, and the two beading mechanisms 33 are respectively arranged at the outer sides of the two second part material supporting rollers 3222. It should be noted that the material supporting roller 22 is an integral body, and for convenience of description, the material supporting roller 322 is artificially divided into two parts; in addition, the outer side of the second part material supporting rollers 3222 refers to the side of one second part material supporting roller far away from the other second part material supporting roller.

In this embodiment, the first material supporting roller 3221 is adjacent to the welding host 20, and the second material supporting roller 3222 is adjacent to the plate shearing machine 40.

The number of the edge pressing mechanisms 33 is two, the two edge pressing mechanisms 33 are respectively arranged at the outer sides of the two second partial material supporting rollers 3222 and are slidably mounted on the base 31, that is, the distance between the two edge pressing mechanisms 33 is adjustable.

The two beading mechanisms 33 are arranged symmetrically about the central axis of the beading machine 30, which is oriented parallel to the top skin transport direction.

The edge pressing mechanism 33 includes a sliding plate 331 slidably attached to the base 31, an extension plate 332 extending from the sliding plate 331 in a direction away from the base 31, and a plurality of edge pressing members 333 provided at intervals on the extension plate 332.

The sliding plate 331 is a plate-shaped structure, and is used for carrying the extension plate 332, the plurality of edge pressing components 333 and the second driving mechanism 35, and can drive the above components to slide integrally, and the edge pressing mechanism 33 can change the distance between the edge pressing mechanism 33 and another edge pressing mechanism 33 through the sliding of the sliding plate 331, so that top skins with different width dimensions can be processed compatibly. Under normal conditions, the positions of the two edge pressing mechanisms 33 are adjusted simultaneously, and the adjustment amounts are the same, for example, if the distance between the welding top skin to be processed and the two existing edge pressing mechanisms 33 is smaller than 4 cm, the two edge pressing mechanisms 33 slide to the inner side by 2 cm respectively, and are convenient to be matched with other stations.

The extension plate 332 has a plate-shaped structure, and is used for mounting the blank holder 333 and the second driving mechanism 35.

The number of the blank holder parts 333 is plural, and the blank holder parts are provided to the extension plate 332 at intervals along the length direction of the extension plate 332, which is the same as the transport direction of the welded top skin. In this embodiment, the number of the blank holding members 333 is four, and in other embodiments, the number of the blank holding members 333 may be three, five, or the like.

The hold-down part 333 comprises a first hold-down roller 3331 and a second hold-down roller 3332 which are arranged at intervals up and down, gaps for holding the welding top skin are formed between the first hold-down roller 3331 and the second hold-down roller 3332 at intervals, and the first hold-down roller 3331 is located on one side, far away from the base 31, of the second hold-down roller 3332.

The shape design of the first edge pressing roller 3331 and the second edge pressing roller 3332 is related to the target shape to be pressed, in this example, two edges of the thin plate are required to be pressed into inclined edges inclined towards the direction of the base 31, and the inclined angle is 10 degrees, which is an included angle between the inclined edge and the plane where the main body part of the top skin is located.

First blank holder roller 3331 with second blank holder roller 3332 is integrated into one piece structure, for the shape of conveniently describing both, artificially will first blank holder roller 3331 with the main part and the extension that are connected are all distinguished to second blank holder roller 3332, just first blank holder roller 3331's extension with second blank holder roller 3332's extension all is close to extend board 332. In this embodiment, the main body of the first blankholder 3331 and the main body of the second blankholder 3331 are both cylindrical structures, the extension part of the first blankholder 3331 and the extension part of the second blankholder 3331 are both truncated cone-shaped structures, the extension part of the first blankholder 3331 gradually increases from the main body to the direction of the extension plate 332, the extension part of the second blankholder 3332 gradually decreases from the main body to the direction of the extension plate 332, and the extension part of the first blankholder 3331 and the extension part of the second blankholder 3331 are matched with each other to press the edge of the welded top skin into a beveled edge inclined toward the direction of the base 31.

Specifically, in this embodiment, the angle of the beveled edge to be pressed is 10 degrees, and accordingly, the included angle between the generatrix and the axis of the extension portion of the first edge pressing roller 3331 and the extension portion of the second edge pressing roller 3331 is 10 degrees, and if the angle of the beveled edge to be pressed is 15 degrees, and accordingly, the included angle between the generatrix and the axis of the extension portion of the first edge pressing roller 3331 and the extension portion of the second edge pressing roller 3331 is 15 degrees, that is, the shape of the extension portion of the first edge pressing roller 3331 and the shape of the extension portion of the second edge pressing roller 3331 are related to the shape of the beveled edge to be pressed.

The hand-operated screw rod assembly 34 is disposed on one side of the sliding plate 31 facing the base 11, and is configured to drive the sliding plate 31 to slide, and includes a screw rod unit 341, two sliding rails 342 respectively disposed on two sides of the screw rod unit, and a sliding block 343 mounted on the sliding rails 342 and capable of sliding along the sliding rails 342, where the sliding block 343 is fixedly connected to the sliding plate 331, and the sliding plate 331 slides along the sliding rails 342. The lead screw is screwed through the hand wheel of the hand lead screw unit 341 so as to drive the sliding plate 331 to slide along the sliding rail 342 through the lead screw nut.

The second driving mechanism 35 is used for driving the two edge pressing mechanisms 33. The second driving mechanism 35 is attached to the slide plate 331 so as to be slidable together with the slide plate 331.

The second driving mechanism 35 includes a blank pressing power assembly 353 for providing power, two gear assemblies 351 arranged corresponding to the two blank pressing mechanisms 33, and a power transmission assembly 352 having two ends respectively connected to the two gear assemblies 351 to transmit power, wherein the blank pressing power assembly 353 is connected to one of the gear assemblies 351 and transmits power to the other gear assembly 351 through the power transmission assembly 352.

In this embodiment, only one power module 353 is provided and the driving of the other binder mechanism 33 is transmitted by the power transmission module 352, but in other embodiments, two power modules 353 may be provided for two binder mechanisms 33, and in this case, the power transmission module 352 may not be provided.

The gear assembly 351 includes N gear sets 3511, a transmission gear 3512 located between two adjacent gear sets 3511 and engaged with two adjacent gear sets 3511, a first bearing seat 3513 fixedly connected with the base 31, a plurality of second bearing seats 3514 fixedly connected with the base 31 and arranged at intervals, a first transmission shaft 3515 with two ends respectively penetrating through the first bearing seat 3513 and the extension plate 332, and a plurality of second transmission shafts 3516 with two ends respectively penetrating through the second bearing seats 3514 and the extension plate 332, wherein the number of the transmission gears 3512 is N-1, one first transmission shaft 3515 is connected with the power assembly 353, and N is an integer greater than 2.

In this embodiment, the first transmission shaft 3515 is a telescopic transmission shaft so that the distance between the two sliding plates 31 can be adjusted.

The gear set 3511 comprises an upper gear and a lower gear which are connected in a meshing manner, the upper gear is mounted on a shaft of the first edge pressing roller 3331, the lower gear is mounted on a shaft of the second edge pressing roller 3332, and the lower gear is connected with the transmission gear 412 in a meshing manner. Note that the upper and lower tables herein show the orientation of the binder 30 in the working state.

In this embodiment, the number of the edge pressing members 333 of each edge pressing mechanism 33 is four, and correspondingly, the number of the gear sets 3511 of each gear assembly 351 is four, the upper gears of the four gear sets 3511 are respectively mounted on the shafts of the first edge pressing rollers 331 of the four edge pressing members 33, the lower gears of the four gear sets 3511 are respectively mounted on the shafts of the second edge pressing rollers 332 of the four edge pressing members 33, and the first edge pressing rollers 331 and the second edge pressing rollers 332 are driven to rotate by the upper gears and the lower gears.

The number of the gear sets 3511 of each gear assembly 351 is four, correspondingly, the number of the transmission gears 3512 is three, one transmission gear 3512 is arranged between every two gear sets 3511, and the transmission gears 3512 are in meshed connection with the lower gears on two sides of the transmission gears 3512. Accordingly, the number of the first transmission shafts 3515 is one, the number of the second transmission shafts 3516 is two, and three transmission gears 3512 are respectively mounted on one first transmission shaft 3515 and two second transmission shafts 3516.

For convenience of description and understanding, the four gear sets 3511 are respectively divided into a first gear set, a second gear set, a third gear set and a fourth gear set along the conveying direction of the top cover; the three transmission gears 3512 are divided into a first transmission gear, a second transmission gear and a third transmission gear, the second transmission gear is installed on the first transmission shaft 415, and the first transmission gear and the third transmission gear are respectively installed on the two second transmission shafts 416.

The power assembly 353 is connected with the first transmission shaft 3515, the first transmission shaft 3515 drives a second transmission gear, and the second transmission gear drives lower gears of a second gear set and a third gear set which are positioned on two sides of the second transmission gear. The second gear of the second gear set drives the upper gear of the second gear set and the first transmission gear which are in meshed connection with the second gear set, the first transmission gear drives the lower gear of the first gear set which is in meshed connection with the first transmission gear, and the lower gear of the first gear set drives the upper gear of the first gear set which is in meshed connection with the first transmission gear; the second gear of the third gear set drives a lower gear of the third gear set and the third transmission gear which are in meshed connection with the second gear, the third transmission gear drives a lower gear of a fourth gear set which is in meshed connection with the third transmission gear, and the lower gear of the fourth gear set drives an upper gear of the fourth gear set which is in meshed connection with the fourth transmission gear.

The power transmission assembly 352 comprises two couplers 3521 and a connecting shaft 3522, two ends of the connecting shaft 3522 are respectively connected with one ends of the two couplers 3521, and the other ends of the two couplers 3521 are respectively connected with first transmission shafts 3515 of the two gear assemblies 351.

The power provided by the blank holder power assembly 353 can be transmitted by providing the power transmission assembly 352.

The blank pressing power assembly 353 comprises a second motor 3531 mounted on the base 31, a second speed reducer 3532 in transmission connection with the second motor 3531, a second driving wheel 3533 mounted on an output shaft of the second speed reducer 3532, a second sprocket 3534 mounted on the first driving shaft 3515 and spaced from the second driving wheel 3533, and a second chain 3535 wound around the second driving wheel 3533 and the second sprocket 3534, wherein the second motor 3531 drives the second speed reducer 3532, the second speed reducer 3532 drives the second driving wheel 3533, the second driving wheel 3533 drives the second sprocket 3534 to rotate through the second chain 3535, and the second sprocket 3534 drives the first driving shaft 3515 to rotate.

The second spiral elevator 36 is connected with the first edge pressing roller 3331 to adjust the width of a gap between the first edge pressing roller 331 and the second edge pressing roller 332, is compatible with welding top skins with different thicknesses, and is convenient to adjust when the edge pressing machine works and a clamping plate phenomenon occurs.

In this embodiment, the total number of the beading members 333 is 8, 4 beading members 333 are respectively disposed on each beading mechanism 33, correspondingly, the number of the second spiral lifters 36 is 8, and one second spiral lifter 36 is correspondingly disposed on each beading member 333.

The second adjusting mechanism 37 includes the support frame 371 and install in two second rotary screw rods 372 of the support frame 371, the support frame 371 include two with the perpendicular roof beam 3711 of base 31 fixed connection, and both ends respectively with two perpendicular roof beam 3711 fixed connection's crossbeam 3722, two the second rotary screw rod 372 is installed respectively in two perpendicular roof beams 3711, the second rotary screw rod 372 plays the effect of direction and location, and the welding top skin clamp is located two between the side fender wheel of the second rotary screw rod 372.

The number of the material pressing cylinder assemblies 38 is two, and the two material pressing cylinder assemblies 38 are mounted on the cross beam 3722 at intervals and used for flattening and welding the top skin.

The adjustable edge pressing template 39 is arranged on one side of the second part material supporting roller 3222 far away from the first part material supporting roller 3221, and is used for ensuring consistency of edge pressing angles of the top skin.

The adjustable blank holder module 39 comprises a mounting frame 391 having a receiving space, a blank holder wheel assembly 392 mounted on one side of the mounting frame 391 facing the material supporting roller assembly, and a shape correcting assembly 393 received in the receiving space, wherein the mounting frame 391 is fixedly connected with the extension board 332.

The mounting frame 391 includes a bottom plate 3911, a top plate 3912 opposite to the bottom plate 3911, and a vertical plate 3913 installed on a side surface of the bottom plate 3911 and having two ends connected to the bottom plate 3911 and the top plate 3912, wherein an arc-shaped angle adjusting hole is opened in the vertical plate 3913.

The number of the blank holder wheel assemblies 392 is two, and the two blank holder wheel assemblies 392 are arranged at intervals along the length direction of the vertical plates 3913 to form gaps for clamping the top skin.

The blank holder wheel assembly 392 comprises a blank holder bearing block 3921, a blank holder bearing 3922, a blank holder transmission shaft 3923, a blank holder wheel 3924 and a bearing end cover 39239, the blank holder bearing block 3921 is fixedly connected with a bottom plate 3911 or a top plate 3912 of the mounting frame 391, the blank holder bearing 3922 is mounted on the bearing block 3921, the transmission shaft 3923 is rotatably connected with the blank holder bearing 3922, the blank holder wheel 3924 is sleeved on the transmission shaft 3923 and can rotate together with the transmission shaft 3923, and the bearing end cover 3925 is mounted at one end, far away from the blank holder wheel 3924, of the blank holder bearing block 3921.

The school shape subassembly 393 includes side pressure axle 3931, the cover is located the outer installation bearing 3932 of side pressure axle 3931, the cover is located the outer side pinch roller 3933 of first bearing 3932, with side pressure axle 3931 fixed connection's connecting plate 3934, certainly connecting plate 3934 is kept away from the one end of side pressure axle 3931 is to keeping away from blank pressing wheel subassembly 392 direction vertical bending extension's regulating plate 3935, and be used for with regulating plate 3935 with the regulating part that first side plate 3913 is connected, the blank pressing of top skin with side pinch roller 3933 orientation the face butt of bottom plate 3911, the one end of regulating part is passed angle regulation hole with regulating plate 3935 is connected just the regulating part can be followed the angle regulation hole removes to change the contained angle of side pressure axle 3931 and horizontal plane, the contained angle is the folding angle degree of blank pressing.

The quantity of regulating part is two, the regulating part includes bolt and nut, two screw holes have been seted up to correspondence on the regulating plate 3935, two the one end of bolt is passed the different positions in angle modulation hole are inserted in the screw hole, two the nut is installed respectively in two the other end of bolt will first curb plate 3913 with regulating plate 3935 fastening connection.

When the contained angle of side pressure axle 3931 and horizontal plane needs to be adjusted, loosen the nut, make the bolt remove along the angle adjustment hole, the bolt can drive the regulating plate rather than being connected and rotate together, and the regulating plate can drive side pressure axle 3931 and rotate together, and then has changed the contained angle of side pressure axle 3931 and horizontal plane, works as when the contained angle is predetermined bending angle, again with the nut install in the head of bolt, will first curb plate 3913 with regulating plate 3935 fixed connection.

Preferably, an angle scale mark is arranged on the vertical plate 3913 corresponding to the angle adjusting hole.

By providing sizing assembly 393, consistency of the top skin hold-down angle is ensured.

The plate shearing machine 40 is a hydraulic swing type plate shearing machine, has the model of QC12Y-4 x 3200, and is used for cutting off the welded top skin after edge pressing according to a preset length so as to meet production requirements.

The blanking conveying line 50 is used for conveying the cut welding top skin to the next station.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions and substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims

1. The utility model provides a top covering processingequipment which characterized in that, along feeding to ejection of compact direction, includes according to establishing decoiler, welding host computer, beading machine, plate shearing machine and the unloading transfer chain that connects the setting, wherein:

2. The top skin machining device according to claim 1, wherein the uncoiler includes a frame, a feed drum mounted to the frame, an expansion sleeve mounted at a center of the feed drum, and a pneumatic pressure roller assembly connected to the frame and abutting a surface of the feed drum.

3. The top skin processing apparatus according to claim 1, wherein the support mechanism includes a base, two sets of first support members symmetrically disposed extending from an upper surface of the base in a direction away from the base, two sets of second support members symmetrically disposed and two sets of third support members symmetrically disposed, and a top frame spaced opposite to the base, two ends of the top frame are respectively connected to the two sets of second support members, the base includes a first base for supporting the first support members, the second support members, and the third support members, and a second base disposed side by side with the first base, and a first driving mechanism is mounted to the second base.

4. The top skin processing apparatus of claim 3, wherein an intermediate position of each of a first nip roller and a second nip roller of the plurality of second transport rollers has a gap that matches the weld; welding mechanism including all install in the wire reel of top frame, send a machine, two inter block interval set up compress tightly the subassembly and locate two compress tightly between the subassembly and be located the laser welder head of gap top, the wire reel is used for the storage welding wire, send a machine be used for with the welding wire of wire reel is carried extremely the welding seam, the laser welder head be used for sending laser beam and throw in the welding seam, compress tightly the subassembly include with the top frame is connected and the cover is located first the epaxial bearing in center of the first clamp roller of second transportation roller, locate the bearing inboard and with the linking bridge that the bearing is connected and install in linking bridge keeps away from the ramp plate of bearing one side, ramp plate is used for pushing down the top covering.

5. The top skin processing apparatus according to claim 4, wherein the number of the second transportation rollers is two, and the first driving mechanism includes a central shaft disposed between the two second transportation rollers and mounted on the second support member, a central gear mounted on the central shaft, two sets of driven gears engaged with the central gear, and a welding power assembly for driving the central shaft to rotate; every the second transportation roller corresponds a set of driven gear, every group driven gear including install in the first driven gear of the center pin of the first double-layered roller of second transportation roller with install in the second driven gear of the center pin of the second double-layered roller of second transportation roller, the second driven gear with the sun gear meshing is connected, first driven gear with the second driven gear meshing is connected, welding power component drive the center pin rotates, the center pin drives sun gear rotates, sun gear drives and is located its both sides and rather than two that the meshing is connected the second driven gear rotates, the second driven gear drives rather than the meshing is connected first driven gear rotates, thereby the drive the second transportation roller rotates.

6. The top skin processing apparatus of claim 5, wherein the welding power assembly includes a first motor fixed to the second base, a first speed reducer in transmission connection with the first motor, a first driving wheel mounted on an output shaft of the first speed reducer, a first sprocket mounted on the second base and spaced from the first driving wheel, and a first chain wound around the first driving wheel and the first sprocket, the first sprocket being mounted on the central shaft and spaced from the central gear, the first motor driving the first speed reducer, the first speed reducer driving the first driving wheel, the first driving wheel driving the first sprocket to rotate via the first chain, the first sprocket driving the central shaft to rotate.

7. The top skin machining device according to claim 3, wherein the welding host further includes an adjusting mechanism group disposed corresponding to the first transport roller and the third transport roller, the adjusting mechanism group includes two first adjusting mechanisms disposed symmetrically, the first adjusting mechanisms include mounting posts fixedly connected to the first base and first rotary lead screws disposed on the mounting posts, and the two top skins are sandwiched between the two first rotary lead screws of the adjusting mechanism group.

8. The top skin machining device of claim 1, wherein the hold-down mechanism includes a slide plate slidably mounted to the base, an extension plate extending from the slide plate in a direction away from the base, and a plurality of hold-down members spaced apart from the extension plate; the edge pressing component comprises a first edge pressing roller and a second edge pressing roller, the first edge pressing roller and the second edge pressing roller are arranged at intervals to form gaps for clamping the top skin, and the second driving mechanism is installed on the sliding plate and connected with the first edge pressing roller and the second edge pressing roller.

9. The top skin processing apparatus of claim 8, wherein the edge press further comprises a hand-operated lead screw assembly for driving the sliding plate to slide, the hand-operated lead screw assembly comprises a lead screw unit, two sliding rails respectively disposed at two sides of the lead screw unit, and a sliding block mounted on the sliding rails and capable of sliding along the sliding rails, and the sliding block is fixedly connected to the sliding plate.

10. The top skin processing apparatus according to claim 8 or 9, wherein the second driving mechanism includes a blank pressing power assembly for providing power, two gear assemblies disposed corresponding to the two blank pressing mechanisms, and a power transmission assembly having two ends respectively connected to the two gear assemblies to transmit power, the blank pressing power assembly being connected to one of the gear assemblies and transmitting power to the other gear assembly through the power transmission assembly;

the gear assembly comprises N gear sets, transmission gears which are positioned between every two adjacent gear sets and are in meshed connection with the two adjacent gear sets, and a first transmission shaft and a second transmission shaft which are arranged on the base, the gear sets comprise two first gears and two second gears which are in meshed connection, the first gears are arranged on shafts of the first edge pressing rollers, the second gears are arranged on shafts of the second edge pressing rollers, the second gears are in meshed connection with the transmission gears, the number of the transmission gears is N-1, one of the transmission gears is connected with the power assembly, and N is an integer larger than 2; n-1 transmission gears are respectively arranged on the first transmission shaft and the second transmission shafts; the first transmission shaft is a telescopic transmission shaft, and the first transmission shaft of one of the gear assemblies is connected with the power assembly.