CN107931457B

CN107931457B - Synchronous riveting equipment for side edges and end edges of refrigerator inner containers

Info

Publication number: CN107931457B
Application number: CN201711188766.7A
Authority: CN
Inventors: 葛孝华; 王文青; 查雷
Original assignee: Anhui Kingpower Equipment and Mould Manufacture Co Ltd
Current assignee: Anhui Kingpower Equipment and Mould Manufacture Co Ltd
Priority date: 2017-11-24
Filing date: 2017-11-24
Publication date: 2023-10-17
Anticipated expiration: 2037-11-24
Also published as: CN107931457A

Abstract

The invention discloses side edge end edge synchronous riveting equipment of a refrigerator inner container, which comprises an inner container supporting mechanism, a double-side step riveting mechanism and an end edge riveting mechanism. The double-side step riveting mechanism and the end edge riveting mechanism are oppositely arranged. The inner container supporting mechanism is used for supporting the inner container of the refrigerator. The double-side step riveting mechanism comprises a double-side riveting mechanism and a mechanical arm mechanism. The mechanical arm mechanism comprises a mechanical arm. The mechanical arm can horizontally move, and longitudinally stretch. The double-sided riveting mechanism is arranged at the front end of the mechanical arm and comprises a roller bracket and a plurality of symmetrical pinch rollers arranged on two sides of the roller bracket. The end edge riveting mechanism comprises a horizontal edge riveting mechanism and a telescopic arm mechanism. The telescopic arm mechanism comprises a telescopic arm. The telescopic arm is longitudinally telescopic. The horizontal edge riveting mechanism is arranged at the front end of the telescopic arm. The horizontal edge riveting mechanism comprises a straight edge clamping mechanism, a straight edge pressing plate bending mechanism and a pressing plate driving mechanism.

Description

Synchronous riveting equipment for side edges and end edges of refrigerator inner containers

Technical Field

The invention relates to refrigerator liner production equipment.

Background

The refrigerator liner coaming is used for isolating the refrigerator liner and the refrigerating device. The liner coaming of the refrigerator is usually made of patterned aluminum plates. Generally, the refrigerator liner coaming is formed by riveting a U-shaped coaming made of two patterned aluminum plates to form a port-shaped coaming, and then riveting a bottom plate. The two U-shaped coamings are riveted one by one to form a port coaming, and then the port coamings are riveted with the Z-shaped bottom plate to form the refrigerator liner coamings with the step shape. In the prior art, the riveting between the two U-shaped coamings and the Z-shaped bottom plate is completed manually. The Z-shaped floor has a total of ten edges. Wherein two sidelines are bending lines, no riveting is needed, and the rest eight sidelines are all needed to be riveted. Obviously, it is not possible to rivet eight edges simultaneously, but it is necessary to rivet in steps. The invention relates to a device for such step riveting in a single station.

Disclosure of Invention

The invention aims to solve the problems that: the bottom plate of the refrigerator liner is riveted step by step.

In order to solve the problems, the invention adopts the following scheme:

the side edge synchronous riveting equipment for the refrigerator inner container comprises an inner container supporting mechanism, a double-side step riveting mechanism and an edge riveting mechanism; the double-side step riveting mechanism and the end edge riveting mechanism are oppositely arranged; the inner container supporting mechanism is used for supporting the inner container of the refrigerator and is positioned between the double-side step riveting mechanism and the end edge riveting mechanism and comprises a six-column frame supporting mechanism and a liftable cabinet opening table; the six-column frame body supporting mechanism comprises six upright posts; six upright posts are four-tall and two-short, and form a step-type frame body supporting mechanism; the transverse and longitudinal dimensions of the six-column frame body supporting mechanism are adjustable; the cabinet mouth table ring six-column type frame body supporting mechanism is arranged; the double-side step riveting mechanism comprises a double-side riveting mechanism and a mechanical arm mechanism; the mechanical arm mechanism comprises a mechanical arm; the mechanical arm can horizontally move horizontally and longitudinally stretch out and draw back; the double-sided riveting mechanism is arranged at the front end of the mechanical arm and comprises a roller bracket and a plurality of symmetrical pinch rollers arranged at two sides of the roller bracket; a plurality of pinch rollers arranged on two sides of the roller bracket form a rolling type flanging mechanism; the end edge riveting mechanism comprises a horizontal edge riveting mechanism and a telescopic arm mechanism; the telescopic arm mechanism comprises a telescopic arm; the telescopic arm is longitudinally telescopic; the horizontal edge riveting mechanism is arranged at the front end of the telescopic arm; the horizontal edge riveting mechanism comprises a straight edge clamping mechanism, a straight edge pressing plate bending mechanism and a pressing plate driving mechanism; the straight-side pressing plate bending mechanism comprises a straight-side pressing plate mould strip, a straight-side bending mould strip and a straight-side driving frame; the straight-side pressing plate mould strip is arranged below the straight-side driving frame through a spring column mechanism; the straight-side bending die strip is arranged below the straight-side driving frame through a die strip mounting plate; the straight-side pressing plate die strip is positioned in front of the straight-side bending die strip, and is parallel to and clung to the straight-side bending die strip; the straight edge clamping mechanism is positioned behind the straight edge bending die strip and is parallel to the straight edge bending die strip; the pressing plate driving mechanism comprises a driving cylinder; the driving cylinder is connected with the straight-edge driving frame.

Further, the straight edge clamping mechanism comprises a straight edge clamping gap, a straight edge clamping guide plate and a straight edge clamping fixture block; the straight edge clamping opening guide plate is positioned at the front end of the straight edge clamping opening mounting plate and forms an L-shaped structure with the straight edge clamping opening mounting plate; the straight edge clamping block is positioned in the L-shaped structure and is arranged at the front end of the straight edge clamping mounting plate; the straight edge clamping gap is a strip-shaped gap between the straight edge clamping block and the straight edge clamping guide plate, and the front end of the straight edge clamping gap is open; the straight edge clamping opening guide plate protrudes forwards than the straight edge clamping opening clamping block, so that a step-shaped notch is formed between the straight edge clamping opening guide plate and the straight edge clamping opening clamping block.

Further, the roll hemming mechanism includes: a first section pinch roller sleeve, a middle section pinch roller sleeve and a tail section pinch roller sleeve; the first section pinch roller sleeve, the middle section pinch roller sleeve and the tail section pinch roller sleeve are sequentially arranged front and back; the first-section pinch roller sleeve comprises at least three parallel pinch roller sets; the parallel pressing wheel group comprises an upper pressing wheel and a lower pressing wheel, wherein the axis of the upper pressing wheel and the axis of the lower pressing wheel are horizontal and parallel; the lower pressing wheel is positioned below the upper pressing wheel and comprises a conical surface; the cylindrical surface of the upper pressing wheel and the conical surface of the lower pressing wheel form an acute clamping opening; the cone angles of the conical surfaces of the lower pressing wheels are sequentially arranged from large to small; the middle section pinch roller sleeve comprises at least two middle section pinch rollers; the middle-section pinch roller comprises a conical surface part and a pressure plate part; the pressing plate is positioned at the outer side of the conical surface part; taper angles of the taper surfaces of the middle-section pinch rollers are sequentially arranged from small to large; the tail section pinch roller sleeve comprises at least one vertical pinch roller group; the vertical pinch roller group comprises a top pinch roller with a horizontal axis and a side pinch roller with a vertical axis; the side pressing wheel is positioned below the top pressing wheel axle center, and the side pressing wheel axle center and the top pressing wheel axle center are positioned on the same vertical plane; the cylindrical surface of the top pressing wheel and the cylindrical surface of the side pressing wheel form a right-angle clamping opening.

Further, six upright posts of the six-post frame body supporting mechanism are divided into three upright post groups: the first upright post group, the second upright post group and the third upright post group; each set of upright post group comprises two upright posts with the same height; the upright posts of the first upright post group and the second upright post group are high, and are high upright posts; the upright posts of the third upright post group are shorter than the upright posts of the first upright post group and the second upright post group, and are short upright posts; the first upright post group, the second upright post group and the third upright post group are sequentially arranged and positioned on a longitudinal central axis; two upright posts of the three upright post sets are respectively arranged at two sides of the longitudinal central axis and are symmetrical with the longitudinal central axis; the distances between the upright posts of the three upright post sets and the longitudinal central axis are the same; two high upright posts of the first upright post group are vertically arranged on the first longitudinal translation plate through a transverse adjusting mechanism; two upright posts of the second upright post group are vertically arranged on the longitudinal fixing plate through a transverse adjusting mechanism; two upright posts of the third upright post group are vertically arranged on the second longitudinal translation plate through a transverse adjusting mechanism; the three transverse adjusting mechanisms corresponding to the three sets of upright post groups are connected with synchronous spacing adjusting driving mechanisms; the synchronous spacing adjustment driving mechanism is used for driving each transverse adjustment mechanism and synchronizing the spacing of the upright posts adjusted by each transverse adjustment mechanism; the first longitudinal translation plate and the second longitudinal translation plate are arranged on longitudinal sliding rails parallel to the longitudinal central axis and are respectively connected with a longitudinal translation driving mechanism; the longitudinal translation driving mechanism is used for driving the first longitudinal translation plate or the second longitudinal translation plate to move along the longitudinal central axis.

Further, the transverse adjusting mechanism comprises a transverse screw rod and a transverse sliding rail; the bottoms of two upright posts of the upright post group are respectively erected on a transverse sliding rail through sliding blocks; the transverse screw rod is provided with forward and reverse threads and is parallel to the transverse sliding rail; the bottoms of the two upright posts of the upright post group are respectively connected with the forward threads and the reverse threads of the transverse screw rod through the screw sleeves, so that the two upright posts of the upright post group can be driven to move in opposite directions on the transverse sliding rail when the transverse screw rod rotates; the synchronous interval adjustment driving mechanism comprises a first vertical petal shaft transmission mechanism, a second vertical petal shaft transmission mechanism, a third vertical petal shaft transmission mechanism, a petal shaft and a width adjustment motor; the first vertical petal shaft transmission mechanism, the second vertical petal shaft transmission mechanism and the third vertical petal shaft transmission mechanism are arranged on the petal shaft and can move along the petal shaft; the petal shaft is perpendicular to the transverse screw rod of the transverse adjusting mechanism; the petal shaft is connected with a transverse screw rod of a transverse adjusting mechanism corresponding to the three sets of upright post groups through a first vertical petal shaft transmission mechanism, a second vertical petal shaft transmission mechanism and a third vertical petal shaft transmission mechanism respectively; the petal shaft is connected with a width adjusting motor.

Further, an adjustable bridge plate chain is arranged between the top ends of the two upright posts of the third upright post group; an adjustable bridge plate chain is arranged between the top ends of the two upright posts on the same side of the first upright post group and the second upright post group; one end of the adjustable bridge plate chain is fixed at the top end of one upright post, and the other end of the adjustable bridge plate chain bypasses an arc-shaped supporting block arranged on the other upright post and is connected with a bridge chain pulling mechanism; the portion of the adjustable bridge plate link chain between the two upright posts is horizontal and does not sag due to slackening.

Further, the adjustable bridge plate chain is formed by sequentially connecting chain link blocks in series; the chain link block consists of a table panel, a clamping plate and a serial connection part; the serial connection part consists of two shaft hole plates; the two ends of the shaft hole plate are respectively provided with a first shaft hole and a second shaft hole; the shaft hole plate is provided with a bending part, so that the shaft hole plate is zigzag; the two shaft hole plates are oppositely arranged, so that the axes of the first shaft holes of the two shaft hole plates are overlapped, the axes of the second shaft holes of the two shaft hole plates are overlapped, and the first shaft holes on the two shaft hole plates of the serial connection part of the chain link blocks can be clamped on the inner sides of the second shaft holes on the two shaft hole plates of the serial connection part of the adjacent chain link blocks; the first shaft holes on the two shaft hole plates of the chain link block are connected with the second shaft holes on the two shaft hole plates of the adjacent chain link block through bearings, and the two adjacent chain link blocks can rotate around the axle center of the bearings; the clamping plates are arranged on the side edges of the two shaft hole plates and are parallel to the axle center of the first shaft hole; the deck plate is arranged on the clamping plate and is parallel to the axis of the first shaft hole; the widths of the table panel and the clamping plate are the same as the axle center distance of the first axle hole and the second axle hole on the axle hole plate; the table top board and the clamping plate are arranged in a staggered mode, so that a zigzag structure is formed between the table top board and the clamping plate.

Further, the mechanical arm mechanism further comprises a mechanical arm translation plate and a mechanical arm transverse beam; the mechanical arm and the mechanical arm transverse beam are horizontally arranged and mutually perpendicular; the mechanical arm translation plate is arranged on the mechanical arm transverse beam through the mechanical arm transverse translation mechanism, so that the mechanical arm translation plate can translate along the mechanical arm transverse beam; the mechanical arm is installed on the mechanical arm translation plate through the mechanical arm longitudinal translation mechanism, so that the mechanical arm can longitudinally stretch and retract along the mechanical arm.

Further, the mechanical arm transverse translation mechanism comprises a mechanical arm transverse guide rail mechanism and a mechanical arm transverse driving mechanism; the mechanical arm transverse guide rail mechanism comprises a mechanical arm transverse top sliding rail and a mechanical arm transverse side sliding rail; the mechanical arm transverse driving mechanism comprises a mechanical arm transverse rack, a mechanical arm transverse driving gear and a mechanical arm transverse motor; the mechanical arm transverse top sliding rail, the mechanical arm transverse side sliding rail and the mechanical arm transverse rack are arranged along the direction of the mechanical arm transverse beam and are horizontally arranged; the mechanical arm transverse top sliding rail and the mechanical arm transverse rack are positioned on the top surface of the mechanical arm transverse beam; the mechanical arm transverse side sliding rail is positioned on the side surface of the mechanical arm transverse beam; the bottom of the mechanical arm translation plate is erected on a mechanical arm transverse top sliding rail through a mechanical arm transverse top sliding block, and the mechanical arm transverse side sliding block is erected on a mechanical arm transverse side sliding rail and is horizontally arranged; the mechanical arm transverse motor is arranged on the mechanical arm translation plate; the mechanical arm transverse driving gear is arranged below the mechanical arm translation plate, meshed with the mechanical arm transverse rack and connected with the mechanical arm transverse motor; the mechanical arm longitudinal translation mechanism comprises a mechanical arm longitudinal guide rail mechanism and a mechanical arm longitudinal driving mechanism; the mechanical arm longitudinal guide rail mechanism comprises a mechanical arm longitudinal guide rail; the mechanical arm longitudinal driving mechanism comprises a mechanical arm longitudinal rack, a mechanical arm longitudinal driving gear and a mechanical arm longitudinal motor; the mechanical arm is provided with two longitudinal sliding rails which are respectively arranged at two sides of the mechanical arm; the mechanical arm is suspended and erected on a mechanical arm longitudinal suspension sliding block arranged on the mechanical arm longitudinal suspension frame through mechanical arm longitudinal sliding rails at two sides; the mechanical arm longitudinal suspension frame is arranged on the mechanical arm translation plate; the mechanical arm longitudinal rack is arranged below the mechanical arm and meshed with a mechanical arm longitudinal driving gear arranged on the mechanical arm translation plate; the mechanical arm longitudinal motor is arranged below the mechanical arm translation plate and is connected with the mechanical arm longitudinal driving gear.

Further, the telescopic arm mechanism comprises a telescopic arm mounting plate and a telescopic arm transverse beam; the telescopic arm transverse beam is horizontally arranged; the telescopic arm mounting plate is mounted on the telescopic arm transverse beam; the telescopic arm is horizontally arranged on the telescopic arm mounting plate through the telescopic driving mechanism and is vertical to the transverse beam of the telescopic arm; the telescopic arm transverse beam is horizontally arranged on the support column through the lifting mechanism; the lifting mechanism comprises a lifting connecting frame, a lifting sliding rail, a lifting motor, a lifting synchronous shaft and a lifting rack; the lifting connecting frames are two; the two lifting connecting frames are high and are respectively erected on the support column through vertically arranged lifting sliding rails; two ends of the lifting synchronous shaft are respectively erected on the lifting connecting frame, and the middle of the lifting synchronous shaft is connected with the lifting motor; the lifting rack is vertically arranged on the support column; lifting gears meshed with the lifting racks are arranged at two ends of the lifting synchronous shaft; the two ends of the telescopic arm transverse beam are arranged on the lifting connecting frame.

The invention has the following technical effects: the invention realizes simultaneous riveting of the side edges of the large coaming and the end edges of the small coaming. The riveting acting force directions of the two parts are different, and the inner container supporting mechanism cannot be subjected to overlapped acting force, so that stress yielding deformation of the six-column type frame supporting mechanism can be reduced, and the yield can be improved.

Drawings

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

Fig. 2 is a schematic structural view of a liner supporting mechanism according to an embodiment of the present invention.

Fig. 3 and 4 are schematic structural views of a six-column frame supporting mechanism according to an embodiment of the present invention from different angles.

Fig. 5 is a schematic structural view of the lateral adjustment mechanism and the synchronous spacing adjustment driving mechanism in the six-column frame body supporting mechanism.

Fig. 6 is a schematic view of an installation structure of an adjustable bridge plate link chain in an embodiment of the present invention. Fig. 7 is an enlarged view of the upper right corner portion of fig. 6. Fig. 8 is a schematic view of the structure of fig. 7 with the adjustable bridge plate links removed.

Fig. 9 and 10 are schematic views of a portion of a link block of an adjustable bridge plate link chain. Fig. 9 shows a state in which the adjustable bridge link is straightened, and fig. 10 shows a state in which the one-way bend is bent.

Fig. 11 is a bottom perspective view of the link block. FIG. 12 is a schematic side dimension of a link block.

Fig. 13 is a schematic view of the overall structure of the end edge riveting mechanism.

Fig. 14 is a schematic view of the overall structure of the double-sided step-rivet mechanism.

Fig. 15 and 16 are longitudinal and transverse views, respectively, of a robotic arm mechanism in a double sided step rivet mechanism.

Fig. 17 is a schematic structural view of a horizontal edge riveting mechanism.

Fig. 18, 19, 20 and 21 are schematic diagrams illustrating the operation of the horizontal edge riveting mechanism according to the embodiment of the present invention. Fig. 19 further includes a schematic structural diagram of the straight edge clipping mechanism.

Fig. 22 is a schematic structural view of a double-sided rivet mechanism.

Fig. 23, 24 and 25 are three parallel pinch roller sets of the first segment pinch roller assembly in a double sided rivet mechanism, respectively.

Figures 26 and 27 are two middle pinch rollers of a middle pinch roller assembly in a double sided rivet mechanism, respectively.

Figure 28 is a vertical pinch roller set in the tail pinch roller assembly of the double sided edge rivet mechanism.

Fig. 29 is a schematic view of a riveted portion of a liner of a refrigerator according to an embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings.

Fig. 29 shows a reverse-buckling refrigerator liner, wherein 5991 is a Z-shaped bottom plate, 5992 is a U-shaped large coaming, and 5993 is a U-shaped small coaming. The U-shaped large coaming 5992 and the U-shaped small coaming 5993 are mutually riveted to form a port coaming, and then the port coaming is riveted with the Z-shaped bottom plate 5991 to form the refrigerator liner. The side edge synchronous riveting equipment of the refrigerator liner is used for riveting a side edge angle line 5996 between a Z-shaped bottom plate 5991 and a U-shaped large coaming 5992 and simultaneously riveting an end edge angle line 5994 between the Z-shaped bottom plate 5991 and a U-shaped small coaming 5993. There are two side corner lines 5996.

The synchronous riveting equipment for the side edges and the end edges of the refrigerator liner in the embodiment, as shown in fig. 1, comprises a liner supporting mechanism 501, a double-side step riveting mechanism and an end edge riveting mechanism. The double sided step rivet mechanism includes a double sided rivet mechanism 506 and a robotic arm mechanism. The robotic arm mechanism includes a robotic arm 411. The mechanical arm 411 is horizontally translatable and longitudinally retractable. A double sided rivet mechanism 506 is mounted at the front end of the robot arm 411. The end edge riveting mechanism includes a horizontal edge riveting mechanism 505 and a telescopic arm mechanism. The telescopic arm mechanism includes a telescopic arm 511. Telescoping arm 511 is longitudinally telescoping. The horizontal edge riveting mechanism 505 is mounted at the front end of the telescopic arm 511. The opposite arrangement of the double-sided step rivet mechanism and the end edge rivet mechanism means that the telescopic arm 511 and the mechanical arm 411 are parallel to each other and the front ends are opposite. The liner supporting mechanism 501 is used for supporting the liner of the refrigerator, and is located between the double-side step riveting mechanism and the end edge riveting mechanism, as shown in fig. 2, and comprises a six-column frame supporting mechanism 13 and a liftable cabinet opening table 111. The six-column frame body supporting mechanism 13 includes six columns. Six stand columns are four tall and two short, and form a step-type frame body supporting mechanism. The six-column frame support mechanism 13 is adjustable in lateral and longitudinal dimensions. The cabinet opening table 111 is provided with a six-column frame body supporting mechanism 13. When the refrigerator liner is placed on the liner supporting mechanism 501, the refrigerator liner is sleeved on the six-column frame body supporting mechanism 13 in a back-off mode, and the opening of the refrigerator liner is supported by the opening table 111.

The specific structure of the six-column frame support mechanism 13 is shown in fig. 2, 3, 4, and 5. The six columns of the six-column frame body supporting mechanism 13 are divided into three sets of column groups, and each set of column groups comprises two columns with the same height. The three sets of upright post groups are respectively: the first upright post group, the second upright post group and the third upright post group. The first column set and the second column set are tall columns 1331. The third set of posts is shorter than the first and second sets of posts, being short posts 1332. That is, the six posts of the six-post frame support mechanism 13 include four tall posts 1331 and two short posts 1332. The first upright post group, the second upright post group and the third upright post group are sequentially arranged and are positioned on the longitudinal central axis. The two stand columns of the three stand column groups are respectively arranged on two sides of the longitudinal central axis and are symmetrical with the longitudinal central axis, the spacing between the two stand columns of the three stand column groups is the same, and a step-shaped structure is formed at the tops of the six stand columns, so that the Z-shaped base plate can be matched.

The two tall posts 1331 of the first post set are vertically disposed on the first longitudinal translation plate 1313 by a lateral adjustment mechanism. Two tall posts 1331 of the second post set are vertically disposed on the longitudinal fixation plate 1317 by a lateral adjustment mechanism. Two short posts 1332 of the third post set are vertically disposed on second longitudinal translation plate 1316 by a lateral adjustment mechanism. The first longitudinal translation plate 1313 and the second longitudinal translation plate 1316 are horizontally mounted on a longitudinal slide rail 1311 parallel to the longitudinal central axis by a slider, and are respectively connected with a longitudinal translation driving mechanism: a first longitudinal translation drive mechanism and a second longitudinal translation drive mechanism. The longitudinal rails 1311 are horizontally mounted on the bottom plate 1300. The bottom plate 1300 is horizontally fixed to the support base 110. The support frame base 110 is mounted to the station base 500.

The first and second longitudinal translation driving mechanisms are respectively used for driving the first and second longitudinal translation plates 1313 and 1316 to move along the longitudinal central axis. The first longitudinal translation drive mechanism includes a first longitudinal drive motor 1310 and a first longitudinal screw 1312. The first longitudinal screw 1312 is located on the longitudinal centerline and is connected to a first longitudinal drive motor 1310. The first longitudinal screw 1312 is connected to a first longitudinal translation plate 1313 by a wire sleeve. Thus, the first longitudinal driving motor 1310 drives the first longitudinal screw 1312 to rotate, and the first longitudinal translation plate 1313 is driven to translate on the longitudinal slide 1311 by the threaded engagement between the first longitudinal screw 1312 and the wire sleeve at the bottom of the first longitudinal translation plate 1313. The second longitudinal translation drive mechanism includes a second longitudinal drive motor 1314 and a second longitudinal lead screw 1315. A second longitudinal screw 1315 is located on the longitudinal centerline and is connected to a second longitudinal drive motor 1314. The second longitudinal screw 1315 is connected to a second longitudinal translation plate 1316 by a wire sleeve. Thus, the second longitudinal driving motor 1314 drives the second longitudinal screw 1315 to rotate, and the second longitudinal screw 1316 is driven to translate on the longitudinal slide 1311 by the threaded engagement between the second longitudinal screw 1315 and the wire sleeve at the bottom of the second longitudinal translation plate 1316. When the first longitudinal translation driving mechanism and the second longitudinal translation driving mechanism drive the first longitudinal translation plate 1313 and the second longitudinal translation plate 1316 to move respectively, the two columns of the first column group on the first longitudinal translation plate 1313 and the two columns of the third column group on the second longitudinal translation plate 1316 move relative to the two columns of the second column group, so that the longitudinal distance between the column groups is adjusted, that is, the longitudinal dimension of the six-column frame supporting mechanism 13 is adjusted.

The transverse adjusting mechanism is used for adjusting the distance between two upright posts in the upright post group, so as to adjust the transverse dimension of the six-post type frame body supporting mechanism 13. The three transverse adjusting mechanisms corresponding to the three sets of upright post groups are connected with synchronous spacing adjusting driving mechanisms. The synchronous spacing adjustment driving mechanism is used for driving each transverse adjustment mechanism and enabling each transverse adjustment mechanism to adjust the spacing of the upright posts synchronously. The synchronous pitch adjustment drive mechanism includes a first vertical petal-axis transmission mechanism 1301, a second vertical petal-axis transmission mechanism 1302, a third vertical petal-axis transmission mechanism 1303, a petal axis 1304, and a width adjustment motor 1305. The lateral adjustment mechanism, as shown in fig. 7, includes a lateral lead screw 1321 and a lateral slide rail 1322. The bottoms of the two upright posts of the upright post group are respectively vertically erected on the transverse sliding rail 1322 through the sliding blocks 1323. The transverse sliding rails 1322 corresponding to the three sets of upright posts are respectively and horizontally erected on the first longitudinal translation plate 1313, the longitudinal fixing plate 1317 and the second longitudinal translation plate 1316. The transverse slide 1322 is perpendicular to the longitudinal slide 1311. The transverse screw 1321 is provided with forward and reverse threads, which are parallel to the transverse slide rails 1322. The bottoms of the two columns of the column groups are respectively connected with the forward threads and the reverse threads of the transverse screw rod 1321 through the screw sleeves, so that when the transverse screw rod 1321 rotates, the two columns of the corresponding column groups can be driven to move on the transverse sliding rail 1322 in opposite directions. The first, second, and third vertical petal-axis transmission mechanisms 1301, 1302, and 1303 are provided on the petal axis 1304, and are movable along the petal axis 1304. The petal axle 1304 is parallel to the longitudinal rails 1311 and perpendicular to the lateral lead screw 1321 of the lateral adjustment mechanism. The petal shaft 1304 is connected with a transverse screw 1321 of a transverse adjusting mechanism corresponding to the three sets of upright posts through a first vertical petal shaft transmission mechanism 1301, a second vertical petal shaft transmission mechanism 1302 and a third vertical petal shaft transmission mechanism 1303 respectively. The petal shaft 1304 is connected with a width adjusting motor 1305. Thus, when the width adjusting motor 1305 drives the petal shaft 1304 to rotate, the petal shaft 1304 drives the transverse screw 1321 of the transverse adjusting mechanism corresponding to the three sets of upright posts to rotate through the first vertical petal shaft transmission mechanism 1301, the second vertical petal shaft transmission mechanism 1302 and the third vertical petal shaft transmission mechanism 1303, respectively, thereby adjusting the spacing between two upright posts of the three sets of upright posts. Petal shaft 1304 is the same as the spline shaft in CN 105798180A.

The cabinet opening table 111 is provided with a ring column, that is, a column hole is provided on the cabinet opening table 111, as shown in fig. 2. Six upright posts of the six-post frame body supporting mechanism 13 respectively pass through the corresponding upright post holes. The cabinet opening table 111 is connected with a cabinet opening table lifting mechanism, and is lifted and adjustable through the cabinet opening table lifting mechanism. The cabinet opening table lifting mechanism is used for driving the cabinet opening table 111 to lift and comprises a chain 112, a motor 113 and four sets of wire rod column sleeve mechanisms. The screw post sleeve mechanism includes a screw sleeve post 121, a screw post 122, a drive gear 123, and two clamping gears 124. The silk fibroin column 121 is vertically installed on the support frame base 110. The screw post 122 is vertically disposed within the socket hole of the socket post 121. Four screw rod column sleeve mechanisms are respectively positioned at four corners of the support frame base 110. The cabinet opening table 111 is mounted on the top end of the screw rod column 122 and is horizontally arranged. The cabinet opening table 111 is a square plate body, and four corners of the square plate body respectively correspond to one set of wire rod column sleeve mechanism. A horizontal gear cabinet 125 is mounted on top of the silk sleeve column 121. The drive gear 123 is mounted on the screw post 122 above the gear cabinet 125. Two clamping gears 124 are mounted on the gear cabinet 125 on either side of the drive gear 123. The driving gear 123 can be rotated in synchronization with the screw post 122. When the driving gear 123 rotates, the screw rod 122 is driven to rotate. The rotating screw rod column 122 drives the screw rod column 122 to lift through the screw thread action between the screw rod column 122 and the screw sleeve column 121, so that the cabinet opening table 111 is driven to lift. The motor 113 is mounted on the support frame base 110 and is connected with a driving gear 114. Two transition gears 115 are provided on the table on which the driving gear 114 is mounted. The drive gear 123, the clamping gear 124, the drive gear 114, and the transition gear 115 are all located at the same height. The chain 112 crosses around the drive gear 114, the transition gear 115, the drive gear 123 and the clamping gear 124. Wherein, at the driving gear 114 and the transition gears 115, the chain 112 bypasses the driving gear 114 and the two transition gears 115 so that the chain 112 is in an omega structure and simultaneously meshes with the driving gear 114 and the two transition gears 115. At the drive gear 123 and the clamp gear 124, the chain 112 is clamped between the drive gear 123 and the clamp gear 124, and simultaneously meshes with the drive gear 123 and the clamp gear 124. Therefore, when the motor 113 drives the driving gear 114 to rotate, the chain 112 rotates and moves along with the driving gear, so as to drive the driving gears 123 of the screw rod column sleeve mechanisms to rotate, and the cabinet opening table 111 is driven to lift by the threaded engagement action between the screw rod column 122 and the screw sleeve column 121.

When the refrigerator liner is reversely buckled and sleeved on the six-column frame body supporting mechanism 13, the end corner line 5994 in fig. 29 is positioned between the top ends of the two columns of the third column group, and the side corner line 5996 is positioned between the top ends of the two columns on the same side of the first column group and the second column group. The end edge riveting mechanism faces to the top ends of the two upright posts of the third upright post group. An adjustable bridge plate chain 14 is arranged between the top ends of the two upright posts facing the third upright post group. An adjustable bridge plate link 14 is installed between the top ends of the two upright posts on the same side of the first upright post group and the second upright post group corresponding to the side corner line 5996. The adjustable bridge plate link chain 14 is used to provide support for the end edge riveting mechanism and the double sided step riveting mechanism during riveting. The adjustable bridge plate link 14 of fig. 3 and 4 is positioned between the top ends of the two columns of the second column set and between the two columns on the same side of the first column set and the second column set. Although the adjustable bridge plate links 14 at the top ends of the two columns of the third column set are not shown, this is not to be construed as an obstacle to the understanding of those skilled in the art. One end of the adjustable bridge plate link 14 is fixed at the top end of one upright, and the other end bypasses an arc-shaped supporting block 1413 arranged on the other upright to be connected with a bridge link pulling mechanism. The bridge chain pulling mechanism is used for pulling one end of the adjustable bridge plate chain 14 to straighten the adjustable bridge plate chain 14 when the distance between the two upright posts is adjusted, so that the length of the part of the adjustable bridge plate chain 14 between the upright posts can be adjusted synchronously with the adjustment of the distance between the upright posts, and the part of the adjustable bridge plate chain 14 between the two upright posts can be kept horizontal all the time. The adjustable bridge plate link chain 14 is a one-way bending chain. The adjustable bridge plate link 14 has a one-way bending function so that the horizontal portion of the adjustable bridge plate link 14 between the two uprights can arch upwardly due to slackening, but cannot sag due to slackening, thereby providing sufficient physical strength support for the riveting of the end edge riveting mechanism.

The specific construction of the adjustable bridge plate link chain 14 is shown in fig. 6, 7, 8, 9, 10, 11, and 12. As shown in fig. 6, the two tall posts 1331 are two posts of the first post set, respectively. The bottoms of the two high upright posts 1331 are respectively vertically erected on the transverse slide rail 1322 through the sliding blocks 1323, so that the two high upright posts 1331 can move on the transverse slide rail 1322, and the distance between the two high upright posts is adjusted. As shown in fig. 6, 7 and 8, each of the two high posts 1331 is a column having an L-shaped cross section. Wherein, the top of the right high upright 1331 is provided with a horizontal first top plate 1411, and the top of the left high upright 1331 is provided with a horizontal second top plate 1451. The top surface of the second top plate 1451 is level with the top surface of the first top plate 1411. The first top plate 1411 is provided with a wedge-shaped support block 1412 toward the inner side of the second top plate 1451. The wedge-shaped support block 1412 has a top surface that is level with the top surface of the first top plate 1411. An arc-shaped support block 1413 is mounted below the wedge-shaped support block 1412. The arc-shaped supporting block 1413 is fixed to the right high upright 1331. A chain channel 1415 is provided between the arcuate support block 1413 and the wedge support block 1412. The arc-shaped supporting block 1413 has an arc surface in a direction toward the wedge-shaped supporting block 1412. One end of the adjustable bridge plate link 14 is secured to a second top plate 1451. The other end bypasses the arc surface on the arc-shaped supporting block 1413 and passes through the chain channel 1415 to be installed on the right high upright 1331 through the bridge chain pulling mechanism. The bridge chain pulling mechanism is used to straighten the adjustable bridge plate chain 14 at one end of the adjustable bridge plate chain 14 when the spacing between the two tall posts 1331 is adjusted.

In this embodiment, the bridge chain pulling mechanism is a rodless cylinder 143 vertically provided on a high upright 1331 on the right side. The rodless cylinder 143 is vertically provided inside the L-shaped cylinder. A piston slide 1431 of the rodless cylinder 143 is fixed to one end of the adjustable bridge plate link 14. When the adjustable bridge plate link 14 is pulled taut and straightened by the bridge pulling mechanism, the portion of the adjustable bridge plate link 14 between the two tall posts 1331 remains horizontal, and the portion of the adjustable bridge plate link 14 between the arcuate support blocks 1413 provided on the right tall post 1331 and the piston slide blocks 1431 remains vertical. When the portion of the adjustable bridge plate link 14 between the two tall posts 1331 is held horizontal, its top surface is flush with the top surfaces of the first and second top plates 1411, 1451. The gap of the arc-shaped connecting part of the top end of the adjustable bridge plate link 14 positioned on the right side high upright 1331 is compensated by the wedge-shaped supporting blocks 1412, so that the two high uprights 1331 have horizontal supporting surfaces. The horizontal support surface is comprised of the top surface of the first top plate 1411, the top surface of the second top plate 1451, the top surface of the horizontal portion of the adjustable bridge chain 14, and the top surface of the wedge support block 1412.

The structure of the adjustable bridge plate link chain 14 is formed by sequentially connecting link blocks in series as shown in fig. 9, 10, 11 and 12. The link block is composed of a deck plate 1421, a detent plate 1422, and a series connection. The link block composed of the deck plate 1421, the detent plate 1422 and the serial portion is integrally processed of stainless steel. The serial connection part is composed of two shaft hole plates 143. The shaft hole plate 143 has a first shaft hole 1431 and a second shaft hole 1432 at both ends thereof, respectively. The shaft hole plate 143 is provided with a bending portion 1433 so that the shaft hole plate 143 is zigzag. The two shaft holes 143 are oppositely arranged, so that the axes of the first shaft holes 1431 of the two shaft holes 143 are coincident, the axes of the second shaft holes 1432 of the two shaft holes 143 are coincident, and the axes of the first shaft holes 1431 are parallel to the axes of the second shaft holes 1432. The first shaft holes 1431 of the two shaft holes 143 of the serial portion of the link block can be caught inside the second shaft holes 1432 of the two shaft holes 143 of the serial portion of the other link block. When the first shaft holes 1431 on the two shaft holes 143 of the serial connection part of the link blocks are clamped inside the second shaft holes 1432 on the two shaft holes 143 of the serial connection part of the other link block and are connected through the bearing 144, the serial connection between the two link blocks is realized. The plurality of link blocks are connected in series between each other to form the adjustable bridge plate link 14 of this embodiment. Adjacent two link blocks can rotate about the axis of the bearing 144 connecting the two link blocks, thereby enabling the adjustable bridge plate link 14 to bend unidirectionally. The retaining plate 1422 is mounted on the side edges of the two shaft hole plates 143 and is parallel to the axis of the first shaft hole 1431. The deck plate 1421 is mounted on the detent plate 1422 and is parallel to the axis of the first shaft hole 1431. Specifically, the plane formed by the axes of the first shaft hole 1431 and the second shaft hole 1432 of the link block is parallel to the top surfaces of the deck plate 1421 and the detent plate 1422. As shown in fig. 12, the first shaft hole 1431 and the second shaft hole 1432 have a center distance L1, the detent plate 1422 has a width L2, and the deck plate 1421 has a width L3. The axial distance L1 of the first shaft hole 1431 and the second shaft hole 1432, the width L2 of the detent plate 1422, and the width L3 of the deck plate 1421 are the same, that is, l1=l2=l3. The deck plate 1421 and the detent plate 1422 are arranged in a staggered manner, so that a zigzag structure is formed between the deck plate 1421 and the detent plate 1422. The offset distance between the deck plate 1421 and the detent plate 1422 is half the width of the deck plate 1421, i.e., L4 in fig. 12 is the offset distance between the deck plate 1421 and the detent plate 1422, l1=l2=l3=2×l4. The staggered deck plate 1421 and the clamping plate 1422 enable two adjacent chain link blocks to rotate in one direction only, and the two adjacent chain link blocks are clamped by the staggered deck plate 1421 and the clamping plate 1422 and cannot be bent when rotating in opposite directions, so that the adjustable bridge plate chain 14 can be bent in one direction only.

In this embodiment, the deck plate 1421 and the detent plate 1422 are plate bodies having a thickness of not less than 0.8 cm, so that the adjustable bridge plate link 14 has sufficient physical strength. And the deck plate 1421 has a square structure. It will be apparent that the top surface of the horizontal portion between the uprights of the adjustable bridge deck chain 14 is stitched together from deck plates 1421 of the individual link blocks. Because the deck plate 1421 is square in configuration, the edges of the spliced deck plate 1421 of each link block have a rectangular square edge. The long straight square right-angle edge is required by the end edge riveting mechanism to rivet the end corner line of the Z-shaped bottom plate of the refrigerator liner. The common unidirectional bending chain does not have a right-angle edge, but can not be used for providing support when the end edge riveting mechanism rivets the end corner line of the Z-shaped bottom plate of the refrigerator liner. In addition, hollow holes 146 are provided in the middle of the deck plate 1421 and the detent plate 1422. The hollowed-out holes 146 are used for saving material cost on the premise of not reducing the physical strength of the plate body.

In the adjustable bridge plate link chain 14 of this embodiment, due to the clamping action of the dislocation structure formed by the deck plate 1421 and the clamping plate 1422, when the adjustable bridge plate link chain 14 is tensioned by the bridge chain pulling mechanism, the upright posts cannot move. The adjustable bridge plate link 14 of this embodiment can thus serve to strengthen the support between the uprights.

The double-sided step-by-step rivet mechanism, as shown in fig. 1 and 13, includes a double-sided rivet mechanism 506 and a robotic arm mechanism. The mechanical arm mechanism, as shown in fig. 1 and 13, includes a mechanical arm 411, a mechanical arm translation plate 412, and a mechanical arm transverse beam 413. The robot arm 411 is longitudinally and horizontally arranged, and the robot arm transverse beam 413 is transversely and horizontally arranged, so that the robot arm 411 and the robot arm transverse beam 413 are mutually perpendicular. The robot transverse beam 413 is mounted on a robot support column 4140. The robot support column 4140 is mounted to the station base 500. The arm translation plate 412 is mounted on the arm transverse beam 413 by an arm transverse translation mechanism such that the arm translation plate 412 can translate along the arm transverse beam 413. The mechanical arm 411 is mounted on the mechanical arm translation plate 412 through a mechanical arm longitudinal translation mechanism, so that the mechanical arm 411 can longitudinally expand and contract along the mechanical arm 411. Thereby enabling the robotic arm 411 to be translatable laterally and retractable longitudinally. The specific structure of the robot arm mechanism is shown in fig. 15 and 16.

The mechanical arm transverse translation mechanism comprises a mechanical arm transverse guide rail mechanism and a mechanical arm transverse driving mechanism. The robot lateral rail mechanism includes a robot lateral top rail 4131 and a robot lateral side rail 4132. The arm transverse drive mechanism includes an arm transverse rack 4133, an arm transverse drive gear 4134, and an arm transverse motor 4135. The arm transverse top slide 4131, the arm transverse side slide 4132, and the arm transverse rack 4133 are all disposed along the orientation of the arm transverse beam 413 and are disposed horizontally. The arm transverse top slide 4131 and the arm transverse rack 4133 are located on the top surface of the arm transverse beam 413. The arm transverse side rails 4132 are located on the sides of the arm transverse beam 413. The arm translation plate 412 is horizontally disposed, with the bottom being mounted on the arm lateral top slide 4131 by the arm lateral top slide 4121 and on the arm lateral side slide 4132 by the arm lateral side slide 4122. The arm lateral side blocks 4122 are mounted on the arm lateral suspension 4123 below the arm translation plate 412. The robot transverse motor 4135 is mounted on the robot translation plate 412. The arm transverse drive gear 4134 is mounted below the arm translation plate 412, engages the arm transverse rack 4133, and is coupled to the arm transverse motor 4135. Thus, the mechanical arm transverse motor 4135 drives the mechanical arm transverse driving gear 4134 to rotate, and drives the mechanical arm translation plate 412 to translate transversely along the mechanical arm transverse top sliding rail 4131 and the mechanical arm transverse side sliding rail 4132 through the meshing action between the mechanical arm transverse driving gear 4134 and the mechanical arm transverse rack 4133. To prevent the arm translation plate 412 from moving out of the arm transverse beam 413, transverse stoppers 4136 are provided at both ends of the arm transverse beam 413. In addition, in the present embodiment, the mechanical arm transverse rack 4133 is an oblique rack; the arm transverse drive gear 4134 is an oblique tooth gear.

The mechanical arm longitudinal translation mechanism comprises a mechanical arm longitudinal guide rail mechanism and a mechanical arm longitudinal driving mechanism. The arm longitudinal rail mechanism includes an arm longitudinal rail 4111. The arm longitudinal driving mechanism includes an arm longitudinal rack 4114, an arm longitudinal driving gear 4115, and an arm longitudinal motor 4116. The mechanical arm longitudinal sliding rails 4111 are two and are respectively arranged at two sides of the mechanical arm 411. The mechanical arm 411 is suspended and erected on a mechanical arm longitudinal suspension sliding block 4112 arranged on a mechanical arm longitudinal suspension frame 4113 through mechanical arm longitudinal sliding rails 4111 on two sides. The arm longitudinal suspension 4113 is mounted on the arm translation plate 412. The suspension mounting manner of the mechanical arm 411 enables a gap to be arranged between the bottom of the mechanical arm 411 and the mechanical arm translation plate 412. The gap is used to mount the arm longitudinal rack 4114 and the arm longitudinal drive gear 4115. The mechanical arm longitudinal rack 4114 is disposed below the mechanical arm 411, and is meshed with a mechanical arm longitudinal driving gear 4115 mounted on the mechanical arm translation plate 412. The arm longitudinal motor 4116 is mounted below the arm translation plate 412 and is connected to the arm longitudinal drive gear 4115. Therefore, the mechanical arm longitudinal motor 4116 drives the mechanical arm longitudinal driving gear 4115 to rotate, and drives the mechanical arm 411 to extend and retract in the longitudinal direction through the meshing action between the mechanical arm longitudinal driving gear 4115 and the mechanical arm longitudinal rack 4114. In order to prevent the mechanical arm 411 from moving out of the mechanical arm translation plate 412, two ends of the mechanical arm 411 are provided with longitudinal limiting blocks 4117. In addition, in the present embodiment, the mechanical arm longitudinal rack 4114 is an oblique rack; the arm longitudinal drive gear 4115 is an oblique tooth gear.

The end edge riveting mechanism, as shown in fig. 13, includes a horizontal edge riveting mechanism 505 and a telescopic arm mechanism. The telescopic arm mechanism comprises a telescopic arm 511, a telescopic arm mounting plate 512 and a telescopic arm transverse frame beam 513. The telescoping arm cross beam 513 is mounted horizontally on two telescoping arm support columns 514 by a lifting mechanism. The telescoping arm support column 514 stands on the station base 500. The telescoping arm mounting plate 512 is secured in the middle of the telescoping arm transverse frame beam 513. The telescopic arm 511 is mounted on the telescopic arm mounting plate 512 through a longitudinal telescopic mechanism, so that the telescopic arm 511 can longitudinally extend and retract. The horizontal edge riveting mechanism 505 is mounted at the front end of the telescopic arm 511. The longitudinal telescopic mechanism between the telescopic arm 511 and the telescopic arm mounting plate 512 is identical to the mechanical arm longitudinal translation mechanism between the mechanical arm 411 and the mechanical arm translation plate 412, and the description thereof is omitted.

The lifting mechanism comprises a lifting connecting frame 5141, a lifting sliding rail 5142, a lifting motor 5143, a lifting synchronous shaft 5145 and a lifting rack 5147. The lifting connection frames 5141 are two and respectively correspond to the two support columns 514. The two lifting connection frames 5141 are high, and are respectively erected on the two telescopic arm support columns 514 through vertically arranged lifting sliding rails 5142. The two ends of the lifting synchronizing shaft 5145 are respectively erected on the lifting connecting frame 5141, and the middle is connected with the lifting motor 5143 through the speed reducer 5144. The lifting racks 5147 have two. The two lifting racks 5147 are respectively and vertically arranged on the two telescopic arm support columns 514 and positioned on the inner side of the lifting slide rail 5142. Lifting gears 5146 meshed with the lifting racks 5147 are arranged at two ends of the lifting synchronous shaft 5145. The lifting gear 5146 can rotate in synchronization with the lifting synchronizing shaft 5145. The telescopic arm transverse beam 513 is mounted on the lifting connection 5141 at both ends. Therefore, when the lifting motor 5143 drives the lifting synchronizing shaft 5145 to rotate, the two lifting gears 5146 at two ends of the lifting synchronizing shaft 5145 synchronously rotate, and the lifting connecting frame 5141, the lifting motor 5143 and the lifting synchronizing shaft 5145 are driven to synchronously lift by the meshing action between the lifting gears 5146 and the lifting racks 5147, so that the telescopic arm transverse beam 513 is driven to lift. The lifting and lowering of the telescoping arm cross beam 513 allows the height of the horizontal edge riveting mechanism 505 to be adjustable.

The horizontal edge riveting mechanism 505, as shown in fig. 17, includes a straight edge pinching mechanism 531, a straight edge pressing plate bending mechanism, a pressing plate driving mechanism, and a bracket 534. Bracket 534 is mounted to the front end of telescoping arm 511 by bottom mounting plate 5341. Thereby, the horizontal edge riveting mechanism 505 is driven to move back and forth when the telescopic arm 511 is telescopic. The straight edge clipping mechanism 531 is mounted on the front side edge of the bottom mounting plate 5341. The straight edge platen bending mechanism is mounted on the front side of the bracket 534 and includes a straight edge platen die bar 5321, a straight edge bending die bar 5322 and a straight edge drive frame 5323. The straight edge platen die bar 5321 is mounted under the straight edge drive frame 5323 by a spring post mechanism 5324. The straight edge bending die 5322 is mounted below the straight edge driving frame 5323 by a die mounting plate 5325. The straight edge platen die 5321 is located before the straight edge bending die 5322 and is parallel to and in close contact with the straight edge bending die 5322. The straight edge clipping mechanism 531 is located behind the straight edge bending die strip 5322 and parallel to the straight edge bending die strip 5322. The straight-side driving rack 5323 is connected to the driving cylinder 5331 through a cylinder connection plate 5332. The driving cylinder 5331 and the cylinder connection plate 5332 constitute a platen driving mechanism.

The straight edge pinching mechanism 531 has a structure including a straight edge pinching gap 5311, a straight edge pinching guide plate 5312, and a straight edge pinching block 5313, as shown in fig. 19. The straight edge clamping guide plate 5312 is located at the front end of the straight edge clamping mounting plate 5314, and forms an L-shaped structure with the straight edge clamping mounting plate 5314. The straight edge nip mounting plate 5314 may be the bottom mounting plate 5341 itself or may be a strip-shaped plate body mounted on the front end of the bottom mounting plate 5341. The straight edge jaw block 5313 is located inside the L-shaped structure and mounted at the front end of the straight edge jaw mounting plate 5314. The straight-side nip gap 5311 is a strip-like gap between the straight-side nip block 5313 and the straight-side nip guide plate 5312, and the front end is open. The width of the straight edge nip gap 5311, that is, the distance between the top surface of the straight edge nip block 5313 and the bottom surface of the straight edge nip guide plate 5312 in fig. 19 is 3 to 6 mm. The front end face of the straight edge clipping guide plate 5312 is provided with a guide inclined plane 5315. The straight edge jaw guide plate 5312 protrudes forward of the straight edge jaw clamp block 5313 such that a step-like gap 5316 is provided between the straight edge jaw guide plate 5312 and the straight edge jaw clamp block 5313.

The working principle of the straight edge riveting mechanism 505 in this embodiment is shown in fig. 18, 19, 20 and 21. In fig. 18, 19, 20, 21, 3901 is a base plate, that is, a Z-shaped base plate 5991 in fig. 29; 3902 is a coaming, that is, a U-shaped small coaming 5993 or a port coaming in FIG. 29; 4903 is a bottom plate bending edge; 4904 is a coaming bending edge; 1901 is a right angle support block. The floor fold 4903 and the coaming fold 4904 are both 90 degree folds. When the refrigerator liner port-shaped coaming and the bottom plate are placed on the liner supporting mechanism, the refrigerator liner port-shaped coaming is shown in figure 18. The right angle support block 1901 is a component of the liner support mechanism, in this embodiment the adjustable bridge plate link 14 described above. Bottom plate 3901 is perpendicular to shroud 3902. First, the edge portion of the bottom plate 3901, the coaming folded edge 404, and the bottom plate folded edge 4903 are caught in the straight edge nip gap 5311 of the straight edge nip mechanism 531 by the forward movement of the straight edge rivet mechanism 505, as shown in fig. 19. Since the width of the straight edge nip gap 5311 is smaller than the width of the floor crimping 4903. Therefore, when the bottom plate bending edge 4903 is clamped into the straight edge clamping gap 5311, the bottom plate bending edge 4903 is further bent, so that after the edge portion of the bottom plate 3901, the coaming bending edge 404 and the bottom plate bending edge 4903 are integrally clamped into the straight edge clamping gap 5311, the edge portion of the bottom plate 3901, the coaming fillet bending edge 4904 and the bottom plate fillet bending edge 4903 are overlapped to form a three-layer edge structure 4905 as shown in fig. 20. Then, after a certain distance of backward movement, the three-layer edge structure 4905 leaves the straight edge clamping mechanism 531, and the straight edge pressing plate bending mechanism is used for further pressing plate bending. When the straight-side pressing plate bending mechanism works, the straight-side pressing plate die 5321 and the straight-side bending die 5322 are firstly pressed towards the right-angle supporting block 1901 by driving of the air cylinder. At this time, the straight edge platen die 5321 is directed against the right angle support block 1901, and the straight edge bending die 5322 is directed against the three-layer edge structure 4905. When the straight edge pressing mold strip 5321 presses on the right angle support block 1901 and continues to press down, the spring column mechanism 5324 contracts, so that the straight edge pressing mold strip 5321 is clamped on the right angle support block 1901, and the straight edge bending mold strip 5322 presses the three-layer edge structure 4905, so that the three-layer edge structure 4905 is bent, a corner four-layer riveting structure 4906 as shown in fig. 21 is formed, and riveting is completed.

In the above process, the forward and backward movement of the straight edge pinching mechanism 531 is achieved by the longitudinal expansion and contraction of the expansion arm 511. As can be seen from the above working principle, when the end edge riveting mechanism performs riveting, the acting force on the six-column frame body supporting mechanism is mainly the longitudinal acting force of the straight edge clamping mechanism 531 when clamping the edge portion of the bottom plate 3901, the coaming bending edge 404 and the bottom plate bending edge 4903, and the straight edge pressing plate bending mechanism is not considered.

The double-sided rivet mechanism 506, as shown in fig. 22, includes a roller bracket 508 and a plurality of pinch rollers mounted on both sides of the roller bracket 508 and symmetrically left and right. The pinch rollers arranged on two sides of the roller bracket 508 form a rolling type flanging mechanism. The roll hemming mechanism can be seen in the roll hemmer in CN 104785598A. In this embodiment, the rolling hemming mechanism is divided into three sets of pinch roller assemblies: first section pinch roller external member, middle section pinch roller external member and tail section pinch roller external member. The first section pinch roller sleeve, the middle section pinch roller sleeve and the tail section pinch roller sleeve are sequentially arranged front and back.

The first-segment pinch roller assembly includes three parallel pinch roller sets 5401, 5402, 5403. Parallel puck stack 5401, 5402, 5403 includes upper puck 5411 and lower puck 5412 as shown in figures 23, 24, and 25, respectively. The upper and lower pressing wheels 5411 and 5412 are installed at both sides of the roller bracket 508 through horizontal rotation shafts, and are bilaterally symmetrical with respect to the center line of the roller bracket 508. Lower puck 5412 is positioned below upper puck 5411. The axes of upper puck 5411 and lower puck 5412 are parallel and lie in the same vertical plane. Lower puck 5412 includes a tapered surface 5413. The tip of the tapered surface 5413 is located outside. The cylindrical surface of the upper pinch roller 5411 and the conical surface 5413 of the lower pinch roller 5412 form an acute nip. As shown in fig. 18 and 23, the acute-angle nip is used for further bending the floor bending edge 4903. When bending, the cylindrical surface of the upper pressing wheel 5411 presses on the bottom plate 3901 to play a role in supporting the pressing plate, and the conical surface 5413 of the lower pressing wheel 5412 acts on the bottom plate bending edge 4903 to bend. The cone angles of the cone 5413 of each lower puck 5412 are arranged in a series from large to small. In this embodiment, the cone angles of the cone 5413 of the three lower pressing wheels 5412 are 120 degrees, 60 degrees and 0 degrees, respectively, that is, the cone angles of the cone 5413 of the three lower pressing wheels 5412 are 60 degrees, 30 degrees and 0 degrees respectively with the horizontal axis. The cone angle of the cone 5413 of the lower pinch roller 5412 of the third parallel pinch roller set 5403 is 0 degrees, which means that the cone 5413 of the lower pinch roller 5412 of the parallel pinch roller set 5403 is cylindrical. The taper angles of the tapered surfaces 5413 of the respective lower pinch rollers 5412 are arranged in order from large to small, such that the base plate crimping edges 4903 are progressively crimped as they pass through the respective parallel pinch roller sets until they are crimped into a three-layered edge configuration 4905 as shown in fig. 20. That is, the first-segment pinch roller sleeve is used for further bending the bottom plate bending edge 4903, so that the bottom plate bending edge 4903 is bent into a three-layer edge structure 4905 on the side corner line 5996 of the refrigerator liner. In this embodiment, the first-segment pinch roller assembly includes three parallel pinch roller sets, and those skilled in the art will appreciate that the first-segment pinch roller assembly may include four, five, or more parallel pinch roller sets.

The midsection pinch roller assembly includes two midsection pinch rollers 5404, 5405. As shown in fig. 26 and 27, the middle-stage pinch rollers 5404 and 5405 include a main body 5421, a tapered surface 5422, and a platen 5423. The middle-section pressing wheels 5404 and 5405 are arranged on two sides of the roller bracket 508 through horizontal rotating shafts, and are symmetrical left and right by taking the central line of the roller bracket 508 as a center. The main body 5421 is positioned inside, the tapered surface 5422 is positioned outside the main body 5421, and the pressing plate 5423 is positioned outside the tapered surface 5422. The taper point of the tapered surface portion 5422 is located outside. The cylindrical surface of the pressing plate 5423 and the tapered surface 5422 form an obtuse angle nip. The obtuse-angle nip is used to further bend the three-layer edge structure 4905 as shown in fig. 20 and 26. When bending, the cylindrical surface of the pressing plate 5423 presses against the bottom plate 3901 to function as a pressing plate, and the tapered surface 5422 acts on the three-layer edge structure 4905 to bend. Taper angles of the tapered surface portions 5422 of the respective middle-stage pinch rollers are arranged in order from small to large. In this embodiment, the taper angles of the tapered surface portions 5422 of the middle-stage pressing wheels 5404 and 5405 are respectively 60 degrees and 120 degrees, that is, the taper angles of the tapered surface portions 5422 of the middle-stage pressing wheels 5404 and 5405 are respectively 30 degrees and 60 degrees with the horizontal axis, so that the three-layer edge structure 4905 is gradually bent and gradually approaches the corner four-layer riveting structure 4906 shown in fig. 21 when passing through each middle-stage pressing wheel. That is, the middle pinch roller assembly is used for bending the three-layer edge structure 4905, and gradually approaches the four-layer riveting structure 4906 at the corners. In this embodiment, the midsection puck assembly includes two midsection pucks, and those skilled in the art will appreciate that the midsection puck assembly may also include three, four, or more midsection pucks.

The tail section pinch roller assembly comprises a vertical pinch roller group. The vertical pinch roller set, as shown in fig. 28, includes a top pinch roller 5406 and a side pinch roller 5407. The top pressing wheel 5406 is installed on two sides of the roller support 508 through a horizontal rotating shaft, and is symmetric about the center line of the roller support 508. The side pressing wheels 5407 are installed on two sides of the roller support 508 through vertical rotating shafts, and are symmetrical left and right by taking the center line of the roller support 508 as a center line. The vertical rotation shaft of the side pinch roller 5407 is mounted on the side pinch roller bracket 5409. The side wheel bracket 5409 is installed at a side of the roller bracket 508. The side pressure wheel 5407 is located below the top pressure wheel 5406 axle center, and the side pressure wheel 5407 axle center and the top pressure wheel 5406 axle center are located on same vertical plane, so that the right angle clamp is constituteed to the cylinder of top pressure wheel 5406 and the cylinder of side pressure wheel 5407. After the side corner line 5996 of the refrigerator liner passes through the middle-section pinch roller sleeve, a shape close to the corner four-layer riveting structure 4906 is formed. The right angle grip, as shown in fig. 21 and 28, is used to further shape the press plate of the near corner four layer rivet structure 4906. When the pressing plate is shaped, the cylindrical surface of the pressing wheel 5406 presses on the bottom plate 3901 to play a role of the pressing plate. In this embodiment, the tail puck assembly includes one vertical puck set, and those skilled in the art will appreciate that the tail puck assembly may include two, three, or more vertical puck sets.

The pinch rollers in the double sided riveting mechanism 506 are left-right symmetric, so that double sided side corner lines 5996 can be riveted. The pinch roller on the left side of the double sided rivet mechanism 506 rivets the right side corner line 5996. The pinch roller on the right side of the double sided rivet mechanism 506 rivets the left side corner line 5996. The riveting switching of the left and right side corner lines 5996 is achieved by the lateral translation of the robotic arm 411.

In addition, it should be noted that the pinch roller in the dual-sided rivet mechanism 506 of the present embodiment is not connected to the power system, that is, the pinch roller is not connected to the motor. When riveting, the whole double-side riveting mechanism 506 moves back and forth through longitudinal translation and expansion and contraction of the mechanical arm 411. When the double-side riveting mechanism 506 moves forwards, friction force between the pinch roller which clings to the plate material and the plate material drives the pinch roller to rotate, and meanwhile, bending and riveting of side corner lines are realized through the pressure action of the pinch roller on the plate material. In short, when riveting, the pinch roller of the double-side riveting mechanism 506 is tightly clung to the plate material and rolls forward once, so that the riveting of the side corner line can be completed. In addition, the pinch rollers of the double-sided rivet mechanism 506 are similar to the upper and lower hemming rollers of the rolling hemmer disclosed in patent document CN 104785598A, but compared to the rolling hemmer in CN 104785598A, the pinch rollers of the double-sided rivet mechanism 506 of the present embodiment are not connected to a motor, but realize hemming by longitudinal translational telescoping of the mechanical arm 411.

In addition, when the double-sided riveting mechanism 506 performs riveting, the acting force of the six-column frame supporting mechanism is mainly a lateral acting force, and is perpendicular to the longitudinal acting force of the end-sided riveting mechanism.

Claims

1. The synchronous riveting equipment for the side edges and the end edges of the refrigerator inner container is characterized by comprising an inner container supporting mechanism (501), a double-side step riveting mechanism and an end edge riveting mechanism; the double-side step riveting mechanism and the end edge riveting mechanism are oppositely arranged; the inner container supporting mechanism (501) is used for supporting the inner container of the refrigerator and is positioned between the double-side step riveting mechanism and the end edge riveting mechanism and comprises a six-column frame supporting mechanism (13) and a liftable cabinet opening table (111); the six-column frame body supporting mechanism (13) comprises six upright columns; six upright posts are four-tall and two-short, and form a step-type frame body supporting mechanism; the transverse and longitudinal dimensions of the six-column frame body supporting mechanism (13) are adjustable; the cabinet opening table (111) is provided with a six-column frame body supporting mechanism (13); the double-side step riveting mechanism comprises a double-side riveting mechanism (506) and a mechanical arm mechanism; the mechanical arm mechanism comprises a mechanical arm (411); the mechanical arm (411) can horizontally translate and longitudinally expand and contract; the double-sided riveting mechanism (506) is arranged at the front end of the mechanical arm (411) and comprises a roller bracket (508) and a plurality of symmetrical pinch rollers arranged at two sides of the roller bracket (508); a plurality of pinch rollers arranged on two sides of the roller bracket (508) form a rolling type flanging mechanism; the end edge riveting mechanism comprises a horizontal edge riveting mechanism (505) and a telescopic arm mechanism; the telescopic arm mechanism comprises a telescopic arm (511); the telescopic arm (511) is longitudinally telescopic; the horizontal edge riveting mechanism (505) is arranged at the front end of the telescopic arm (511); the horizontal edge riveting mechanism (505) comprises a straight edge clamping mechanism (531), a straight edge pressing plate bending mechanism and a pressing plate driving mechanism; the straight-side pressing plate bending mechanism comprises a straight-side pressing plate die strip (5321), a straight-side bending die strip (5322) and a straight-side driving frame (5323); the straight-side pressing plate mould strip (5321) is arranged below the straight-side driving frame (5323) through a spring column mechanism (5324); the straight-edge bending die strip (5322) is arranged below the straight-edge driving frame (5323) through a die strip mounting plate (5325); the straight-side pressing plate die strip (5321) is positioned in front of the straight-side bending die strip (5322) and is parallel to and clung to the straight-side bending die strip (5322); the straight edge clamping mechanism (531) is positioned behind the straight edge bending die strip (5322) and is parallel to the straight edge bending die strip (5322); the pressing plate driving mechanism comprises a driving cylinder; the driving cylinder is connected with a straight-edge driving frame (5323); the straight edge clamping mechanism (531) comprises a straight edge clamping gap (5311), a straight edge clamping guide plate (5312) and a straight edge clamping block (5313); the straight edge clamping guide plate (5312) is positioned at the front end of the straight edge clamping mounting plate (5314) and forms an L-shaped structure with the straight edge clamping mounting plate (5314); the straight edge clamping block (5313) is positioned in the L-shaped structure and is arranged at the front end of the straight edge clamping mounting plate (5314); the straight edge clamping gap (5311) is a strip-shaped gap between the straight edge clamping block (5313) and the straight edge clamping guide plate (5312), and the front end of the straight edge clamping gap is open; the straight edge clamping opening guide plate (5312) protrudes forwards than the straight edge clamping opening clamping block (5313), so that a step-shaped gap (5316) is formed between the straight edge clamping opening guide plate (5312) and the straight edge clamping opening clamping block (5313); the rolling type flanging mechanism comprises: a first section pinch roller sleeve, a middle section pinch roller sleeve and a tail section pinch roller sleeve; the first section pinch roller sleeve, the middle section pinch roller sleeve and the tail section pinch roller sleeve are sequentially arranged front and back; the first-section pinch roller sleeve comprises at least three parallel pinch roller sets; the parallel pressing wheel group comprises an upper pressing wheel and a lower pressing wheel, wherein the axis of the upper pressing wheel and the axis of the lower pressing wheel are horizontal and parallel; the lower pressing wheel is positioned below the upper pressing wheel and comprises a conical surface; the cylindrical surface of the upper pressing wheel and the conical surface of the lower pressing wheel form an acute clamping opening; the cone angles of the conical surfaces of the lower pressing wheels are sequentially arranged from large to small; the middle section pinch roller sleeve comprises at least two middle section pinch rollers; the middle-section pinch roller comprises a cone surface part (5422) and a pressure plate part (5423); the pressing plate part (5423) is positioned outside the cone part (5422); taper angles of the conical surface parts (5422) of the middle-section pinch rollers are sequentially arranged from small to large; the tail section pinch roller sleeve comprises at least one vertical pinch roller group; the vertical pinch roller group comprises a top pinch roller (5406) with a horizontal axis and a side pinch roller (5407) with a vertical axis; the side pressing wheel (5407) is positioned below the axle center of the top pressing wheel (5406), and the axle center of the side pressing wheel (5407) and the axle center of the top pressing wheel (5406) are positioned on the same vertical plane; the cylindrical surface of the top pressing wheel (5406) and the cylindrical surface of the side pressing wheel (5407) form a right-angle clamping opening; six upright posts of the six-post frame body supporting mechanism (13) are divided into three upright post groups: the first upright post group, the second upright post group and the third upright post group; each set of upright post group comprises two upright posts with the same height; the upright posts of the first upright post group and the second upright post group are high, and are high upright posts; the upright posts of the third upright post group are shorter than the upright posts of the first upright post group and the second upright post group, and are short upright posts; the first upright post group, the second upright post group and the third upright post group are sequentially arranged and positioned on a longitudinal central axis; two upright posts of the three upright post sets are respectively arranged at two sides of the longitudinal central axis and are symmetrical with the longitudinal central axis; the distances between the upright posts of the three upright post sets and the longitudinal central axis are the same; two high upright posts of the first upright post group are vertically arranged on the first longitudinal translation plate through a transverse adjusting mechanism; two upright posts of the second upright post group are vertically arranged on the longitudinal fixing plate through a transverse adjusting mechanism; two upright posts of the third upright post group are vertically arranged on the second longitudinal translation plate through a transverse adjusting mechanism; the three transverse adjusting mechanisms corresponding to the three sets of upright post groups are connected with synchronous spacing adjusting driving mechanisms; the synchronous spacing adjustment driving mechanism is used for driving each transverse adjustment mechanism and synchronizing the spacing of the upright posts adjusted by each transverse adjustment mechanism; the first longitudinal translation plate and the second longitudinal translation plate are arranged on longitudinal sliding rails parallel to the longitudinal central axis and are respectively connected with a longitudinal translation driving mechanism; the longitudinal translation driving mechanism is used for driving the first longitudinal translation plate or the second longitudinal translation plate to move along the longitudinal central axis.

2. The refrigerator liner side edge synchronous riveting device according to claim 1, wherein the transverse adjusting mechanism comprises a transverse screw rod (1321) and a transverse sliding rail (1322); the bottoms of the two upright posts of the upright post group are respectively erected on a transverse sliding rail (1322) through sliding blocks; the transverse screw rod (1321) is provided with forward and reverse threads and is parallel to the transverse sliding rail (1322); the bottoms of the two upright posts of the upright post group are respectively connected with the forward threads and the reverse threads of the transverse screw rod (1321) through screw sleeves, so that the two upright posts of the upright post group can be driven to move on the transverse sliding rail (1322) in opposite directions when the transverse screw rod (1321) rotates; the synchronous interval adjustment driving mechanism comprises a first vertical petal shaft transmission mechanism (1301), a second vertical petal shaft transmission mechanism (1302), a third vertical petal shaft transmission mechanism (1303), a petal shaft (1304) and a width adjustment motor (1305); the first vertical petal shaft transmission mechanism (1301), the second vertical petal shaft transmission mechanism (1302) and the third vertical petal shaft transmission mechanism (1303) are arranged on the petal shaft (1304) and can move along the petal shaft (1304); the petal shaft (1304) is perpendicular to a transverse screw rod (1321) of the transverse adjusting mechanism; the petal shaft (1304) is connected with a transverse screw rod (1321) of a transverse adjusting mechanism corresponding to the three sets of upright post groups through a first vertical petal shaft transmission mechanism (1301), a second vertical petal shaft transmission mechanism (1302) and a third vertical petal shaft transmission mechanism (1303) respectively; the petal shaft (1304) is connected with a width adjusting motor (1305).

3. The refrigerator liner side edge synchronous riveting device according to claim 1, wherein an adjustable bridge plate chain is arranged between the top ends of two upright posts of the third upright post group; an adjustable bridge plate chain is arranged between the top ends of the two upright posts on the same side of the first upright post group and the second upright post group; one end of the adjustable bridge plate chain is fixed at the top end of one upright post, and the other end of the adjustable bridge plate chain bypasses an arc-shaped supporting block (1413) arranged on the other upright post and is connected with a bridge chain pulling mechanism; the portion of the adjustable bridge plate link chain between the two upright posts is horizontal and does not sag due to slackening.

4. The refrigerator liner side edge synchronous riveting device according to claim 3, wherein the adjustable bridge plate chain is formed by sequentially connecting chain link blocks in series; the chain link block consists of a table panel (1421), a clamping plate (1422) and a serial part; the serial connection part consists of two shaft hole plates (143); the two ends of the shaft hole plate (143) are respectively provided with a first shaft hole (1431) and a second shaft hole (1432); the shaft hole plate (143) is provided with a bending part (1433) so that the shaft hole plate (143) is zigzag; the two shaft holes (143) are oppositely arranged, so that the axes of the first shaft holes (1431) of the two shaft holes (143) are overlapped, the axes of the second shaft holes (1432) of the two shaft holes (143) are overlapped, and the first shaft holes (1431) on the two shaft holes (143) of the serial connection part of the chain link blocks can be clamped on the inner sides of the second shaft holes (1432) on the two shaft holes (143) of the serial connection part of the adjacent chain link blocks; the first shaft holes (1431) on the two shaft holes (143) of the chain link blocks are connected with the second shaft holes (1432) on the two shaft holes (143) of the adjacent chain link blocks through the bearing (144), and the two adjacent chain link blocks can rotate around the axle center of the bearing (144); the clamping plates (1422) are arranged on the side edges of the two shaft hole plates (143) and are parallel to the axle center of the first shaft hole (1431); the table top board (1421) is arranged on the clamping plate (1422) and is parallel to the axle center of the first axle hole (1431); the widths of the table top plate (1421) and the clamping plate (1422) are the same as the axle center distances of a first axle hole (1431) and a second axle hole (1432) on the axle hole plate (143); the deck plate (1421) and the clamping plate (1422) are arranged in a staggered mode, so that a zigzag structure is formed between the deck plate (1421) and the clamping plate (1422).

5. The refrigerator liner side edge synchronous riveting device according to claim 1, wherein the mechanical arm mechanism further comprises a mechanical arm translation plate (412) and a mechanical arm transverse beam (413); the mechanical arm (411) and the mechanical arm transverse beam (413) are horizontally arranged and mutually perpendicular; the mechanical arm translation plate (412) is arranged on the mechanical arm transverse beam (413) through a mechanical arm transverse translation mechanism, so that the mechanical arm translation plate (412) can translate along the mechanical arm transverse beam (413); the mechanical arm (411) is mounted on the mechanical arm translation plate (412) through a mechanical arm longitudinal translation mechanism, so that the mechanical arm (411) can longitudinally stretch and retract along the mechanical arm (411).

6. The refrigerator liner side edge synchronous riveting device according to claim 5, wherein the mechanical arm transverse translation mechanism comprises a mechanical arm transverse guide rail mechanism and a mechanical arm transverse driving mechanism; the mechanical arm transverse guide rail mechanism comprises a mechanical arm transverse top sliding rail (4131) and a mechanical arm transverse side sliding rail (4132); the mechanical arm transverse driving mechanism comprises a mechanical arm transverse rack (4133), a mechanical arm transverse driving gear (4134) and a mechanical arm transverse motor (4135); the mechanical arm transverse top sliding rail (4131), the mechanical arm transverse side sliding rail (4132) and the mechanical arm transverse rack (4133) are arranged along the direction of the mechanical arm transverse beam (413) and are horizontally arranged; the mechanical arm transverse top sliding rail (4131) and the mechanical arm transverse rack (4133) are positioned on the top surface of the mechanical arm transverse beam (413); the mechanical arm transverse side sliding rail (4132) is positioned on the side surface of the mechanical arm transverse beam (413); the bottom of the mechanical arm translation plate (412) is erected on a mechanical arm transverse top sliding rail (4131) through a mechanical arm transverse top sliding block (4121), and a mechanical arm transverse side sliding block (4122) is erected on a mechanical arm transverse side sliding rail (4132) and is horizontally arranged; the mechanical arm transverse motor (4135) is arranged on the mechanical arm translation plate (412); the mechanical arm transverse driving gear (4134) is arranged below the mechanical arm translation plate (412), is meshed with the mechanical arm transverse rack (4133) and is connected with the mechanical arm transverse motor (4135); the mechanical arm longitudinal translation mechanism comprises a mechanical arm longitudinal guide rail mechanism and a mechanical arm longitudinal driving mechanism; the mechanical arm longitudinal guide rail mechanism comprises a mechanical arm longitudinal slide rail (4111); the mechanical arm longitudinal driving mechanism comprises a mechanical arm longitudinal rack (4114), a mechanical arm longitudinal driving gear (4115) and a mechanical arm longitudinal motor (4116); the mechanical arm longitudinal slide rails (4111) are respectively arranged at two sides of the mechanical arm (411); the mechanical arm (411) is suspended and erected on a mechanical arm longitudinal suspension sliding block (4112) arranged on a mechanical arm longitudinal suspension frame (4113) through mechanical arm longitudinal sliding rails (4111) at two sides; the mechanical arm longitudinal suspension frame (4113) is arranged on the mechanical arm translation plate (412); the mechanical arm longitudinal rack (4114) is arranged below the mechanical arm (411) and meshed with a mechanical arm longitudinal driving gear (4115) arranged on the mechanical arm translation plate (412); the mechanical arm longitudinal motor (4116) is arranged below the mechanical arm translation plate (412) and is connected with the mechanical arm longitudinal driving gear (4115).

7. The refrigerator liner side end edge synchronous riveting apparatus of claim 1, wherein the telescopic arm mechanism comprises a telescopic arm mounting plate (512) and a telescopic arm transverse beam (513); the telescopic arm transverse beam (513) is horizontally arranged; a telescopic arm mounting plate (512) mounted on the telescopic arm transverse beam (513); the telescopic arm (511) is horizontally arranged on the telescopic arm mounting plate (512) through a telescopic driving mechanism and is perpendicular to the telescopic arm transverse beam (513); the telescopic arm transverse beam (513) is horizontally arranged on the telescopic arm support column (514) through a lifting mechanism; the lifting mechanism comprises a lifting connecting frame (5141), a lifting sliding rail (5142), a lifting motor (5143), a lifting synchronous shaft (5145) and a lifting rack (5147); the lifting connecting frames (5141) are two; the two lifting connecting frames (5141) are high and are respectively erected on the telescopic arm support column (514) through vertically arranged lifting sliding rails (5142); two ends of the lifting synchronous shaft (5145) are respectively erected on the lifting connecting frame (5141), and the middle of the lifting synchronous shaft is connected with the lifting motor (5143); the lifting rack (5147) is vertically arranged on the telescopic arm support column (514); lifting gears (5146) meshed with the lifting racks (5147) are arranged at two ends of the lifting synchronous shaft (5145); the two ends of the telescopic arm transverse beam (513) are arranged on the lifting connecting frame (5141).