CN111001725A

CN111001725A - Inner cylinder wall forming machine

Info

Publication number: CN111001725A
Application number: CN201911422540.8A
Authority: CN
Inventors: 王彬; 王海峰
Original assignee: Changfeng Wudao Intelligent Photoelectric Technology Co Ltd
Current assignee: Changfeng Wudao Intelligent Photoelectric Technology Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-04-14
Anticipated expiration: 2039-12-31
Also published as: CN111001725B

Abstract

The invention belongs to the technical field of assembly and manufacturing, and particularly relates to an inner cylinder wall forming machine which comprises a folding mechanism, a turnover mechanism, a seam buckling mechanism and a shaping mechanism, wherein the folding mechanism is used for bending two ends of a plane sheet into V-shaped bayonets and conveying the plane sheet to the turnover mechanism, the turnover mechanism is used for respectively overturning the two ends of the plane sheet for 180 degrees and butting the two ends at the seam buckling mechanism, the seam buckling mechanism is used for fixedly pressing and connecting the two ends of the plane sheet into annular cylinders, and the shaping mechanism is used for rolling the annular cylinders into cylinders. The rolling and seam buckling mechanisms of the cylindrical part are integrated, the processing sequence is adjusted, namely seam buckling is carried out first and then shaping is carried out, the defect that the thin-wall part is not suitable for conveying after being rolled is overcome, the automatic forming of the thin-wall cylindrical part is realized, the processing flow is simplified, and the production efficiency is improved.

Description

Inner cylinder wall forming machine

Technical Field

The invention belongs to the technical field of assembly and manufacturing, and particularly relates to an inner cylinder wall forming machine.

Background

The thin-wall cylindrical fittings such as the inner cylinder wall of a washing machine are generally processed by a process sequence of bending first and then buckling, namely, a plane sheet is rolled to form a certain radian, and then two ends of the plane sheet are riveted into a whole. The forming method has the defects that after the sheet is bent into an arc shape, the sheet still has great flexibility because two ends of the sheet are not connected, and the sheet can be deformed by slight shaking in the transfer process, so that the sheet cannot be accurately positioned, and the automatic transfer of the processing process cannot be realized, so that the processing of the parts at the present stage still depends on a great amount of manual operation.

Disclosure of Invention

The invention aims to provide an inner cylinder wall forming machine capable of improving forming efficiency.

The technical scheme adopted by the invention is as follows:

the inner cylinder wall forming machine comprises a flanging mechanism, a turnover mechanism, a seam buckling mechanism and a shaping mechanism, wherein the flanging mechanism is used for bending two ends of a plane sheet into V-shaped bayonets and conveying the plane sheet to the turnover mechanism, the turnover mechanism is used for respectively overturning 180 degrees of two ends of the plane sheet and enabling the two ends to be in butt joint at the seam buckling mechanism, the seam buckling mechanism is used for fixedly crimping the two ends of the plane sheet so as to enable the sheet to be connected into an annular cylinder material, and the shaping mechanism is used for rolling the annular cylinder material into a cylindrical shape.

The edge folding mechanism comprises a positioning conveying mechanism and a forming roller set, the positioning conveying mechanism comprises clamping units which are respectively arranged at two ends of the plane sheet, the regions to be bent at the two ends of the plane sheet are positioned at the outer sides of the two clamping units, the clamping units are movably arranged along the width direction of the plane sheet, and the forming roller set is positioned on the movable paths of the regions to be bent at the two ends of the plane sheet.

The plane sheet is provided with a first bending part and a second bending part after being bent by the forming roller set, the bending directions of the first bending part and the second bending part are opposite, the second bending part is positioned on the first bending part, the second bending part forms the V-shaped bayonet, and the bending angle of the first bending part is an obtuse angle; the forming roller set comprises a first roller set used for forming the first bending part and a second roller set used for forming the second bending part, the first roller set is positioned at the upstream of the second roller set, namely the first roller set contacts with the plane sheet before the second roller set, and the second roller set is obliquely arranged along the folding direction of the first bending part; the first roller set is composed of at least one pair of circular truncated cone-shaped pair rollers, the second roller set is composed of at least two pairs of V-shaped pair rollers, and the break angle of each V-shaped pair roller is gradually reduced along the conveying direction of the plane sheet.

The centre gripping unit is installed on the slip table that sets up along plane sheet width direction, be equipped with on slip table and the base sliding connection and the base and be used for driving the gliding electric jar of slip table or cylinder.

The turnover mechanism is arranged at the stroke tail end of the positioning and conveying mechanism and comprises two symmetrically arranged clamping parts, the clamping parts are rotationally arranged along a rotating shaft parallel to the width direction of the plane sheet, and the clamping parts are movably arranged in a plane perpendicular to the width direction of the plane sheet; the sheet feeding device also comprises a rotary driving unit for driving the clamping part to rotate, and a translation driving unit for driving the clamping part to move in a plane perpendicular to the width direction of the plane sheet.

The clamping part comprises a first supporting arm and a second supporting arm which are parallel to each other and are arranged at intervals, wherein one end of the first supporting arm and one end of the second supporting arm are fixedly connected into a whole, the other end of the first supporting arm and the other end of the second supporting arm are in a cantilever shape, a movable arm is arranged between the first supporting arm and the second supporting arm, a guide roller is further arranged on one side of the first supporting arm, which is opposite to the movable wall, and is connected with the first supporting arm in a rotating mode, the axis of the guide roller is parallel to the length direction of the first supporting arm, the movable arm is arranged in parallel with the first supporting arm and the second supporting arm, the movable arm is movably arranged in parallel with the first supporting arm and the second supporting arm along the relative direction of the first supporting arm and the second supporting arm, so that the movable arm and the guide roller form a clamping action, and a clamping driving unit for driving the movable.

The movable arm and the second supporting arm form sliding fit through the guide pin, an elastic unit is arranged between the movable arm and the second supporting arm, and the elastic unit is assembled in a way that the elastic force of the elastic unit can drive the movable arm to move in a direction away from the first supporting arm; the clamping driving unit comprises a wedge block arranged on one side of the movable arm facing the second supporting arm and a wedge driving block arranged between the movable arm and the second supporting arm, the wedge driving block is movably arranged along the length direction of the movable arm, the inclined plane of the wedge driving block is opposite to the inclined plane of the wedge block, and the wedge driving block is connected with a linear driving element arranged at one end of the second supporting arm through a connecting rod.

The tensioning mechanism comprises a pull pin hinged with the overhanging end of the second support arm, a hinged shaft of the pull pin is parallel to the width direction of the second support arm, a U-shaped notch corresponding to the position of the pull pin is arranged on the first support arm, a torsional spring is arranged between the pull pin and the second support arm, the torsional spring is assembled to enable the elasticity of the torsional spring to drive the pull pin to swing into the U-shaped notch, a T-shaped head is arranged at the end part of the pull pin, and the T-shaped head is blocked and connected with the end face of the U-shaped notch; and a pushing head is arranged at one end of the connecting rod, which is close to the overhanging end of the second supporting arm, and the pulling pin can be pushed to turn over simultaneously when the linear driving element drives the wedge-shaped driving block to be separated from the wedge-shaped block, so that the pulling pin is moved out of the U-shaped notch and avoids a gap between the first supporting arm and the movable arm.

The translation drive unit comprises a first electric cylinder and a second electric cylinder, the first electric cylinder is vertically arranged, the second electric cylinder is horizontally arranged, the first electric cylinder is fixedly connected with the base, the second electric cylinder is fixedly connected with a sliding block of the first electric cylinder, the clamping part is connected with the sliding block of the second electric cylinder, and the rotation drive unit is an electric joint arranged between the clamping part and the sliding block of the second electric cylinder.

The seam buckling mechanism comprises a seam buckling convex die and a seam buckling concave die, the seam buckling convex die and the seam buckling concave die are arranged oppositely along the vertical direction, at least one of the seam buckling convex die and the seam buckling concave die is arranged in a reciprocating mode along the vertical direction, and the turnover mechanism is assembled to enable a seam to be just positioned between the seam buckling concave die and the seam buckling convex die when the turnover mechanism turns over two ends of a planar sheet respectively by 180 degrees and enables the two ends to be in butt joint; the shaping mechanism comprises three shaping rollers arranged in parallel to the width direction of the plane sheet, when the plane sheet reaches the turnover mechanism, one shaping roller is positioned above the plane sheet, the other two shaping rollers are positioned below the plane sheet, the two shaping rollers below the other shaping roller are arranged in a reciprocating manner along the vertical direction, rotating shafts of the three shaping rollers are connected with a main shaft of a shaping motor through a transmission mechanism so as to drive the three shaping rollers to roll, and the rotating direction of the upper shaping roller is opposite to that of the two shaping rollers below the upper shaping roller; still include discharge mechanism, discharge mechanism includes the push pedal that is on a parallel with annular section of thick bamboo axis direction activity set up and is used for driving the cylinder of push pedal motion, discharge mechanism still includes the conveyer belt that the one end setting of push pedal was kept away from to annular section of thick bamboo.

The invention has the technical effects that: the rolling and seam buckling mechanisms of the cylindrical part are integrated, the processing sequence is adjusted, namely seam buckling is carried out first and then shaping is carried out, the defect that the thin-wall part is not suitable for conveying after being rolled is overcome, the automatic forming of the thin-wall cylindrical part is realized, the processing flow is simplified, and the production efficiency is improved.

Drawings

Fig. 1 is a perspective view of an inner tub wall forming machine of a washing machine according to an embodiment of the present invention;

fig. 2 is a top view of a washing machine inner tub wall forming machine according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is a cross-sectional view B-B of FIG. 2;

FIG. 5 is a front view of a forming roll stack provided by an embodiment of the present invention;

FIG. 6 is a schematic diagram of a process for butt joining two ends of a planar sheet provided by an embodiment of the present invention;

fig. 7 is a sectional view of a clamping state of a clamping portion provided by an embodiment of the present invention;

FIG. 8 is a cross-sectional view of a released condition of the clamping portion provided by an embodiment of the present invention;

FIG. 9 is a front view of a buckle mechanism and a fairing mechanism provided by an embodiment of the invention;

FIG. 10 is a front view of another embodiment of a buttoning mechanism and a sizing mechanism provided in accordance with 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. It should be noted that the width direction in the present invention refers to a direction parallel to the axis of the cylinder after the planar sheet is formed into the cylinder.

Example 1

As shown in fig. 1 and 2, an inner cylinder wall forming machine includes a folding mechanism 20, a turnover mechanism 30, a seam buckling mechanism 40, and a shaping mechanism 50, where the folding mechanism 20 is used to bend two ends of a planar sheet 1 into V-shaped bayonets and convey the planar sheet 1 to the turnover mechanism 30, the turnover mechanism 30 is used to respectively turn over two ends of the planar sheet 1 by 180 ° and butt-joint the two ends at the seam buckling mechanism 40, the seam buckling mechanism 40 is used to press and fix two ends of the planar sheet 1 so as to connect the sheet into a circular cylinder 2, and the shaping mechanism 50 is used to roll the circular cylinder 2 into a circular cylinder. The rolling and seam buckling mechanism 40 of the cylindrical part is integrated, the processing sequence is adjusted, namely seam buckling is carried out first and then shaping is carried out, the defect that the thin-wall part is not suitable for conveying after rolling is overcome, the automatic forming of the thin-wall cylindrical part is realized, the processing flow is simplified, and the production efficiency is improved.

Preferably, as shown in fig. 1, 2, 3, and 5, the folding mechanism 20 includes a positioning and conveying mechanism and a forming roller set 22, the positioning and conveying mechanism includes clamping units 21 respectively disposed at two ends of the planar sheet 1, the regions to be bent at two ends of the planar sheet 1 are located outside the two clamping units 21, the clamping units 21 are movably disposed along the width direction of the planar sheet 1, and the forming roller set 22 is located on a moving path of the regions to be bent at two ends of the planar sheet 1. According to the invention, a rolling bending mode is adopted to replace stamping bending in the prior art, and the bayonets at two ends can be automatically bent and shaped in the process of conveying the planar sheet 1 to the turnover mechanism 30, so that the equipment structure is simplified, the equipment cost is reduced, and the processing efficiency is improved.

As shown in fig. 5. The plane sheet 1 is provided with a first bending part and a second bending part after being bent by the forming roller set 22, the bending directions of the first bending part and the second bending part are opposite, the second bending part is positioned on the first bending part, the second bending part forms the V-shaped bayonets, the bending angle of the first bending part is an obtuse angle, and the reverse bending design enables bayonets at two ends to be turned over for 180 degrees and the vertex angles of the bayonets at two ends to be mutually staggered when opposite to each other, so that the two bayonets can be automatically occluded under the guidance of respective inclined planes by simply driving the two bayonets to be close to each other by the turnover mechanism 30, as shown in fig. 6, the turnover mechanism 30 is prevented from executing a large amount of complex actions, and the equipment structure and the action flow are; the forming roller set 22 includes a first roller set 221 for forming the first bend and a second roller set 222 for forming the second bend, the first roller set 221 is located upstream of the second roller set 222, that is, the first roller set 221 contacts the planar sheet 1 before the second roller set 222, and the second roller set 222 is disposed to be inclined in accordance with the folding direction of the first bend; the first roller set 221 is composed of at least one pair of circular truncated cone-shaped counter rollers, the second roller set 222 is composed of at least two pairs of V-shaped counter rollers, and the break angle of each V-shaped counter roller is gradually reduced along the conveying direction of the planar sheet 1. Because the bending amplitude of the bayonet is larger, the invention adopts a plurality of pairs of V-shaped double rollers to gradually bend the bayonet and finally bend the bayonet into a designed angle, thereby avoiding the deformation of the sheet caused by one-step forming and improving the forming quality.

Preferably, as shown in fig. 3, the clamping unit 21 is mounted on a sliding table 211 arranged along the width direction of the planar sheet 1, the sliding table 211 is slidably connected with a slide rail 212 arranged on the base 10, and an electric cylinder or an air cylinder for driving the sliding table 211 to slide is arranged on the base 10.

Preferably, as shown in fig. 1, 2 and 3, the turnover mechanism 30 is disposed at the end of the stroke of the positioning and conveying mechanism, the turnover mechanism 30 includes two symmetrically disposed clamping portions 31, the clamping portions 31 are rotatably disposed along a rotating shaft parallel to the width direction of the planar sheet 1, and the clamping portions 31 are movably disposed in a plane perpendicular to the width direction of the planar sheet 1; further included are a rotary drive unit 32 for driving the rotation of the grip portion 31, and a translation drive unit 33 for driving the grip portion 31 to move in a plane perpendicular to the width direction of the planar sheet 1. According to the invention, the two ends of the plane sheet 1 are clamped by the clamping part 31 so as to determine the positions of bayonets at the two ends, and three degrees of freedom of rotation, longitudinal translation and transverse translation are designed for the clamping part 31, so that the clamping part 31 can drive the two ends of the sheet to turn over and can translate the two ends to a specified position to realize butt joint, the structure is simple, the control is easy, and the quick butt joint of the two ends of the plane sheet 1 is realized.

Preferably, as shown in fig. 7 and 8, the clamping portion 31 includes a first supporting arm 311 and a second supporting arm 312 which are parallel to each other and spaced apart from each other, one end of the first support arm 311 and one end of the second support arm 312 are fixedly connected into a whole, the other end is in a suspension shape, a movable arm 313 is arranged between the first support arm 311 and the second support arm 312, a guide roller 314 is further disposed on the side of the first support arm 311 opposite to the movable wall, the guide roller 314 is rotatably connected with the first support arm 311, and the axis of the guide roller 314 is parallel to the length direction of the first support arm 311, the movable arm 313 is arranged parallel to the first support arm 311 and the second support arm 312, the movable arm 313 is movably arranged along the opposite direction of the first support arm 311 and the second support arm 312, so that the movable arm 313 and the guide roller 314 form a clamping action, the clamping portion 31 is provided with a clamping driving unit for driving the movable arm 313 to move along the opposite direction of the first support arm 311 and the second support arm 312. The invention adopts the strip-shaped clamping to clamp the whole width direction of the plane sheet material 1, on one hand, the accurate positioning of two wide edges of the sheet material is realized, on the other hand, the sheet material can be prevented from wrinkling in the overturning and moving processes, and the appearance quality of the tube material is improved.

Preferably, the movable arm 313 is in sliding fit with the second support arm 312 through a guide pin 3131, and an elastic unit 3132 is disposed between the movable arm 313 and the second support arm 312, the elastic unit 3132 is configured such that an elastic force thereof can drive the movable arm 313 to move away from the first support arm 311, and the elastic unit 3132 is a compression spring; the clamping driving unit comprises a wedge-shaped block 315 arranged on one side of the movable arm 313 facing the second supporting arm 312 and a wedge-shaped driving block 316 arranged between the movable arm 313 and the second supporting arm 312, the wedge-shaped driving block 316 is movably arranged along the length direction of the movable arm 313, the inclined surface of the wedge-shaped driving block 316 is opposite to the inclined surface of the wedge-shaped block 315, and the wedge-shaped driving block 316 is connected with a linear driving element arranged at one end of the second supporting arm 312 through a connecting rod 317. The invention adopts a wedge block type structure to drive the movable arm 313 to clamp, on one hand, the action of each section in the length direction of the movable arm 313 can be ensured to be consistent, and on the other hand, the stress of each section of the movable arm 313 can be ensured to be uniform.

Furthermore, the overhanging ends of the first support arm 311 and the second support arm 312 are provided with tensioning mechanisms, each tensioning mechanism comprises a pull pin 318 hinged to the overhanging end of the second support arm 312, a hinged shaft of each tensioning mechanism is parallel to the width direction of the second support arm 312, the first support arm 311 is provided with a U-shaped notch 3111 corresponding to the position of the pull pin 318, a torsion spring is arranged between the pull pin 318 and the second support arm 312, the torsion spring is assembled such that the elasticity of the torsion spring can drive the pull pin 318 to swing into the U-shaped notch 3111, the end of the pull pin 318 is provided with a T-shaped head, and the T-shaped head is blocked with the end surface of the U-shaped notch 3111; a pushing head 319 is disposed at one end of the connecting rod 317 close to the overhanging end of the second support arm 312, and when the linear driving element drives the wedge-shaped driving block 316 to separate from the wedge-shaped block 315, the pulling pin 318 can be pushed to turn over at the same time, so that the pulling pin 318 moves out of the U-shaped notch 3111 and avoids the gap between the first support arm 311 and the movable arm 313. Since at least one end of the holding portion 31 of the present invention needs to leave a passage for the planar sheet 1 to move in and out, the first support arm 311 and the second support arm 312 can only be configured as cantilevered structures, but this structural form has a drawback in that the cantilevered end thereof is easily subjected to flexural deformation during the holding, and therefore, the present invention designs the tensioning mechanism at the cantilevered end thereof, and the tensioning mechanism is in a released state during the movement of the planar sheet 1 into and out of the holding portion 31, as shown in fig. 8, when the planar sheet 1 can freely move in and out, and the tensioning mechanism is in a tensioned state when the movable arm 313 is held after the planar sheet 1 is moved into the holding portion 31, as shown in fig. 7, when the cantilevered ends of the first support arm 311 and the second support arm 312 are structurally strengthened. In addition, the invention sets the state switching action of the tensioning mechanism and the clamping action of the movable arm 313 in a linkage manner, thereby simplifying the control flow.

It should be noted that, in the present invention, the structure of the clamping unit 21 is the same as that of the clamping portion 31, and therefore, the detailed structure thereof is not described again, and the discharge port side of the clamping unit 21, i.e., the side where the tensioning mechanism is located, is disposed opposite to the side where the tensioning mechanism of the clamping portion 31 is located.

Preferably, as shown in fig. 4, the translation driving unit 33 includes a first electric cylinder 331 vertically disposed and a second electric cylinder 332 horizontally disposed, the first electric cylinder 331 is fixed to the base 10, the second electric cylinder 332 is fixed to a slider of the first electric cylinder 331, the clamping portion 31 is connected to a slider of the second electric cylinder 332, and the rotation driving unit 32 is an electric joint disposed between the clamping portion 31 and the slider of the second electric cylinder 332.

Preferably, as shown in fig. 9 and 10, the seaming mechanism 40 includes a seaming punch 42 and a seaming die 41, the seaming punch 42 and the seaming die 41 are arranged opposite to each other in the vertical direction, and at least one of the two is arranged in a reciprocating manner in the vertical direction, the turnover mechanism 30 is configured such that when the turnover mechanism turns over two ends of the planar sheet 1 by 180 ° respectively and makes the two ends abut against each other, the seam is just between the seaming die 41 and the seaming punch 42; the shaping mechanism 50 comprises three shaping rollers 51 arranged in parallel to the width direction of the plane sheet 1, when the plane sheet 1 reaches the turnover mechanism 30, one shaping roller 51 is positioned above the plane sheet 1, the other two shaping rollers 51 are positioned below the plane sheet 1, the two shaping rollers 51 below are driven by a piston cylinder to reciprocate along the vertical direction, the rotating shafts of the three shaping rollers 51 are connected with the main shaft of a shaping motor through a transmission mechanism to drive the three shaping rollers 51 to roll, and the rotating direction of the upper shaping roller 51 is opposite to that of the two shaping rollers 51 below; the automatic discharging device further comprises a discharging mechanism 60, wherein the discharging mechanism 60 comprises a push plate 61 movably arranged in parallel with the axial direction of the annular cylinder 2 and an air cylinder 62 used for driving the push plate 61 to move, and the discharging mechanism 60 further comprises a conveying belt 63 arranged at one end, far away from the push plate 61, of the annular cylinder 2.

Example 2

A cylindrical material forming method using the forming machine comprises the following steps:

step 1: blanking, namely cutting the metal strip into rectangular plane sheets 1;

step 2: embossing, namely stamping a concave-convex structure and a mounting hole on the planar sheet 1 according to design requirements;

and step 3: folding, namely conveying the planar sheet 1 to a folding mechanism 20, and bending two ends of the planar sheet 1 into V-shaped bayonets by using the folding mechanism 20;

and 4, step 4: turning, namely conveying the edge-folded planar sheet 1 to a turning mechanism 30, turning two ends of the planar sheet 1 by 180 degrees by using the turning mechanism 30, and transferring the V-shaped bayonets at the two ends to a seam fastening mechanism 40 for fastening;

and 5: performing seam buckling, namely riveting the buckling area of the V-shaped bayonet by using a seam buckling mechanism 40, and fixedly connecting two ends of a plane sheet material 1 to form an annular cylindrical material 2;

step 6: shaping, namely loosening the turnover mechanism 30, clamping the annular cylindrical material 2 by using a shaping roller 51, and driving the shaping roller 51 to rotate to enable the annular cylindrical material 2 to rotate for at least 360 degrees;

and 7: and (5) discharging, namely moving the shaped cylindrical material out of the shaping mechanism 50, and finishing the cylindrical material shaping.

In the step 3, the specific method for folding the edge comprises the following steps: the planar sheet 1 is conveyed to a positioning conveying mechanism, two clamping units 21 of the positioning conveying mechanism clamp two ends of the planar sheet 1, bending regions are reserved at the two ends, and then the positioning conveying mechanism carries the planar sheet 1 to translate along the width direction of the planar sheet, so that the reserved regions at the two ends of the planar sheet sequentially pass through a first roller group 221 and a second roller group 222.

In the step 4, the specific method of turning over is as follows: after the positioning and conveying mechanism carries the planar sheet 1 to pass through the first roller set 221 and the second roller set, the planar sheet 1 is conveyed into the two clamping portions 31 of the turnover mechanism 30, at the moment, the positioning and conveying mechanism loosens the planar sheet 1, meanwhile, the two clamping portions 31 clamp the planar sheet 1, then the translation driving unit 33 drives the two clamping portions 31 to move towards the centers of the two clamping portions, and meanwhile, the rotation driving unit 32 drives the two clamping portions 31 to rotate reversely, so that the two ends of the planar sheet 1 are turned upwards; when the two clamping portions 31 are respectively turned over by 180 degrees, the translation driving unit 33 keeps the two clamping portions 31 at the same height, then the translation driving unit 33 drives the two clamping portions 31 to mutually approach to each other for a distance and then to be away from each other to enable the V-shaped bayonets at the two ends of the plane piece to be mutually overlapped, and then the translation driving unit 33 drives the two clamping portions 31 to mutually depart from each other for a distance to enable the two V-shaped bayonets to be mutually engaged.

In the step 6, after the two clamping portions 31 of the turnover mechanism 30 are loosened, the two guide rollers 314 are always attached to the inner wall of the annular cylindrical material 2 to guide the annular cylindrical material 2 to rotate.

In step 4, while the positioning and conveying mechanism feeds the flat sheet 1 into the two clamping portions 31 of the reversing mechanism 30, the pull pin 318 is separated from the U-shaped notch 3111.

In the step 7, the device further comprises a discharging mechanism 60, wherein the discharging mechanism 60 comprises a push plate 61 movably arranged in parallel to the axial direction of the annular cylinder 2 and an air cylinder 62 for driving the push plate 61 to move, and the discharging mechanism 60 further comprises a conveying belt 63 arranged at one end of the annular cylinder 2 far away from the push plate 61; after the shaping of the annular cylinder 2 is finished, the cylinder 62 ejects the push plate 61, the cylinder is pushed to the conveying belt 63 by the push plate 61, and the conveying belt 63 conveys the cylinder downstream to finish the unloading action.

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. An inner cylinder wall forming machine is characterized in that: the sheet bending and stitching device comprises a folding mechanism (20), a turning mechanism (30), a stitching mechanism (40) and a shaping mechanism (50), wherein the folding mechanism (20) is used for bending two ends of a plane sheet (1) into V-shaped bayonets and conveying the plane sheet (1) to the turning mechanism (30), the turning mechanism (30) is used for respectively turning the two ends of the plane sheet (11) for 180 degrees and enabling the two ends to be in butt joint at the stitching mechanism (40), the stitching mechanism (40) is used for fixedly crimping the two ends of the plane sheet (1) to enable the sheet to be connected into an annular cylinder (2), and the shaping mechanism (51) is used for rolling the annular cylinder (2) into a cylinder shape.

2. The inner cylindrical wall forming machine according to claim 1, wherein: the folding mechanism (20) comprises a positioning conveying mechanism and a forming roller set (22), the positioning conveying mechanism comprises clamping units (21) which are respectively arranged at two ends of the plane sheet (1), the regions to be bent at the two ends of the plane sheet (1) are located on the outer sides of the two clamping units (21), the clamping units (21) are movably arranged along the width direction of the plane sheet (1), and the forming roller set (22) is located on the movable paths of the regions to be bent at the two ends of the plane sheet (1).

3. The inner cylindrical wall forming machine according to claim 2, wherein: the plane sheet (21) is provided with a first bending part and a second bending part after being bent by the forming roller set (22), the bending directions of the first bending part and the second bending part are opposite, the second bending part is positioned on the first bending part, the second bending part forms the V-shaped bayonet, and the bending angle of the first bending part is an obtuse angle; the forming roller set (22) comprises a first roller set (222) for forming a first bending part and a second roller set (222) for forming a second bending part, the first roller set (221) is positioned at the upstream of the second roller set (222), namely the first roller set (221) is in contact with the plane sheet (1) before the second roller set (222), and the second roller set (222) is obliquely arranged along the folding direction of the first bending part; the first roller set (221) is composed of at least one pair of circular truncated cone-shaped roller pairs, the second roller set (222) is composed of at least two pairs of V-shaped roller pairs, and the break angle of each V-shaped roller pair is gradually reduced along the conveying direction of the plane sheet (1).

4. The inner cylindrical wall forming machine according to claim 3, wherein: the clamping unit (21) is installed on a sliding table (211) arranged along the width direction of the plane sheet (1), and the sliding table (211) is connected with the base (10) in a sliding mode and provided with an electric cylinder or an air cylinder (62) used for driving the sliding table (211) to slide on the base (10).

5. The inner cylindrical wall forming machine according to claim 2, wherein: the turnover mechanism (30) is arranged at the stroke tail end of the positioning and conveying mechanism, the turnover mechanism (30) comprises two symmetrically arranged clamping parts (31), the clamping parts (31) are rotationally arranged along a rotating shaft parallel to the width direction of the plane sheet (1), and the clamping parts (31) are movably arranged in a plane vertical to the width direction of the plane sheet (1); the sheet material conveying device further comprises a rotary driving unit (32) for driving the clamping part (31) to rotate, and a translation driving unit (33) for driving the clamping part (31) to move in a plane perpendicular to the width direction of the plane sheet material (1).

6. The inner cylindrical wall forming machine according to claim 5, wherein: the clamping part (31) comprises a first supporting arm (311) and a second supporting arm (312) which are parallel to each other and arranged at intervals, wherein one end of the first supporting arm (311) and one end of the second supporting arm (312) are fixedly connected into a whole, the other end of the first supporting arm is in a suspension extending shape, a movable arm (313) is arranged between the first supporting arm (311) and the second supporting arm (312), a guide roller (314) is further arranged on one side, opposite to the movable wall, of the first supporting arm (311), the guide roller (314) is rotatably connected with the first supporting arm (311), the axis of the guide roller (314) is parallel to the length direction of the first supporting arm (311), the movable arm (313) is arranged in parallel to the first supporting arm (311) and the second supporting arm (312), and the movable arm (313) is movably arranged along the opposite direction of the first supporting arm (311) and the second supporting arm (312) to enable the movable arm (313) to form a clamping action with the guide roller (314), and a clamping driving unit for driving the movable arm (313) to move along the opposite direction of the first support arm (311) and the second support arm (312) is arranged on the clamping part (31).

7. The inner cylindrical wall forming machine according to claim 3, wherein: the movable arm (313) is in sliding fit with the second support arm (312) through a guide pin (3131), an elastic unit (3132) is arranged between the movable arm (313) and the second support arm (312), and the elastic unit (3132) is assembled in a way that the elastic force of the elastic unit can drive the movable arm (313) to move towards a direction away from the first support arm (311); the clamping driving unit comprises a wedge block (315) arranged on one side of the movable arm (313) facing the second supporting arm (312), and a wedge driving block (316) arranged between the movable arm (313) and the second supporting arm (312), wherein the wedge driving block (316) is movably arranged along the length direction of the movable arm (313), the inclined surface of the wedge driving block (316) is oppositely arranged with the inclined surface of the wedge block (315), and the wedge driving block (316) is connected with a linear driving element arranged at one end of the second supporting arm (312) through a connecting rod (317).

8. The inner cylindrical wall forming machine according to claim 2, wherein: the overhanging ends of the first supporting arm (311) and the second supporting arm (312) are provided with tensioning mechanisms, each tensioning mechanism comprises a pull pin (318) hinged to the overhanging end of the second supporting arm (312), a hinged shaft of each tensioning mechanism is parallel to the width direction of the second supporting arm (312), a U-shaped notch (3111) corresponding to the pull pin (318) is arranged on the first supporting arm (311), a torsion spring is arranged between the pull pin (318) and the second supporting arm (312), the torsion spring is assembled to enable the elastic force of the torsion spring to drive the pull pin (318) to swing into the U-shaped notch (3111), a T-shaped head is arranged at the end part of the pull pin (318), and the T-shaped head is blocked with the end surface of the U-shaped notch (3111); one end of the connecting rod (317), which is close to the overhanging end of the second support arm (312), is provided with a push head (319), and when the linear driving element drives the wedge-shaped driving block (316) to be separated from the wedge-shaped block (315), the pull pin (318) can be pushed to turn over at the same time, so that the pull pin (318) moves out of the U-shaped notch (3111) and avoids a gap between the first support arm (311) and the movable arm (313).

9. The inner cylindrical wall forming machine according to claim 1, wherein: the translation driving unit (33) comprises a first electric cylinder (331) and a second electric cylinder (332), the first electric cylinder (331) is vertically arranged, the second electric cylinder (332) is horizontally arranged, the first electric cylinder (331) is fixedly connected with the base (10), the second electric cylinder (332) is fixedly connected with a sliding block of the first electric cylinder (331), the clamping portion (31) is connected with a sliding block of the second electric cylinder (332), and the rotation driving unit (32) is an electric joint arranged between the clamping portion (31) and the sliding block of the second electric cylinder (332).

10. The inner cylindrical wall forming machine according to claim 1, wherein: the seam buckling mechanism (40) comprises a seam buckling convex die (42) and a seam buckling concave die (41), the seam buckling convex die (42) and the seam buckling concave die (41) are oppositely arranged along the vertical direction, at least one of the seam buckling convex die and the seam buckling concave die is arranged in a reciprocating mode along the vertical direction, and the turnover mechanism (30) is assembled to enable a seam to be just positioned between the seam buckling concave die (41) and the seam buckling convex die (42) when the turnover mechanism turns over two ends of a plane sheet (1) for 180 degrees respectively and enables the two ends to be in butt joint; the shaping mechanism (50) comprises three shaping rollers (51) arranged in parallel to the width direction of the plane sheet (1), when the plane sheet (1) reaches the turnover mechanism (30), one shaping roller (51) is positioned above the plane sheet (1), the other two shaping rollers (51) are positioned below the plane sheet (1), the two shaping rollers (51) below are arranged in a reciprocating mode along the vertical direction, the rotating shafts of the three shaping rollers (51) are connected with the main shaft of a shaping motor through a transmission mechanism to drive the three shaping rollers (51) to roll, and the rotating direction of the upper shaping roller (51) is opposite to that of the two shaping rollers (51) below; still include discharge mechanism (60), discharge mechanism (60) are including being on a parallel with annular section of thick bamboo (2) axis direction activity set up push pedal (61) and being used for driving cylinder (62) of push pedal (61) motion, discharge mechanism (60) still include annular section of thick bamboo (2) keep away from conveyer belt (63) that the one end of push pedal (61) set up.