阅读说明：本技术 一种冰箱u型箱壳的自动化成型方法 (Automatic forming method for U-shaped box shell of refrigerator ) 是由 王一风 张小磊 程文强 李志中 于 2021-07-19 设计创作，主要内容包括：本发明公开了一种冰箱U型箱壳的自动化成型方法,通过上料、伺服冲切、180度翻转、辊轧、在线检测、ZL成型及端折弯、U折弯、下料等步骤,实现冰箱U型箱壳的自动化成型生产,工艺简单,智能化程度好,生产效率高；生产的冰箱U型箱壳,通过其两侧的R型结构边板、卡槽型结构边板,以及两末端的R型结构边端板,实现与冰箱内胆的紧密贴合,组装方便,牢固性好,结构稳定,大大提高了冰箱的使用品质。(The invention discloses an automatic forming method of a U-shaped refrigerator shell of a refrigerator, which realizes the automatic forming production of the U-shaped refrigerator shell of the refrigerator through the steps of feeding, servo punching, 180-degree overturning, rolling, online detection, ZL forming, end bending, U bending, blanking and the like, and has the advantages of simple process, good intelligent degree and high production efficiency; the U-shaped case shell of the produced refrigerator is tightly attached to the inner container of the refrigerator through the R-shaped structure side plates, the clamping groove-shaped structure side plates and the R-shaped structure side end plates at two ends of the U-shaped case shell, the U-shaped case shell is convenient to assemble, good in firmness and stable in structure, and the use quality of the refrigerator is greatly improved.)

1. An automatic forming method of a U-shaped box shell of a refrigerator is characterized in that,

the U-shaped box shell is composed of a left shell (2), a top shell (1) and a right shell (3), wherein the left shell (2) and the right shell (3) are respectively positioned on two sides of the top shell (1) to form a U shape, R-shaped structure side plates (21) and clamping groove-shaped structure side plates (22) are respectively arranged on two sides of the top shell (1), the left shell (2) and the right shell (3), and R-shaped structure side end plates (23) are arranged at the tail ends of the left shell (2) and the right shell (3) of the U-shaped box shell;

the automatic forming method of the U-shaped box shell of the refrigerator comprises the following steps:

s1, feeding: carrying out automatic feeding on a raw material steel plate meeting the requirements of the size specification through an automatic feeding machine;

s2, servo punching: installing a plurality of small punching heads through a punching machine, and performing servo electric cylinder punching on a raw material steel plate subjected to automatic feeding to manufacture a punched finished plate, wherein the punched finished plate is a three-section type straight plate consisting of a left shell plate (20), a top shell plate (10) and a right shell plate (30);

s3, 180-degree overturning: turning the punched finished board by 180 degrees through a transition steering machine, and exchanging the front side and the back side;

s4, rolling: rolling the turned punched finished plate by a rolling mill, and respectively rolling two side edges of a left shell plate (20), a top shell plate (10) and a right shell plate (30) of the punched finished plate into an R-shaped structure side plate (21) and a clamping groove-shaped structure side plate (22);

s5, online detection: the quality of the rolled punched finished plate is detected on line by adopting a metal plate on-line detection technology;

s6, ZL forming and end bending: the method comprises the following steps of (1) detecting the joints of a clamping groove type structure side plate (22) of a top shell plate (10) of a punched finished plate meeting quality requirements and clamping groove type structure side plates (22) of a left shell plate (20) and a right shell plate (30) of the top shell plate, and performing ZL bending forming through a punching machine; then, end bending is carried out on the tail ends of a left shell plate (20) and a right shell plate (30) of the punched finished plate through a punching machine to form an R-shaped structure side end plate (23);

s7, U bending: bending and molding the die-cut finished plates subjected to ZL molding and end bending through a U bending machine, and respectively forming a left shell (2), a top shell (1) and a right shell (3) of a U-shaped box shell after bending a left shell plate (20), a top shell plate (10) and a right shell plate (30) to obtain the U-shaped molding box shell of the refrigerator;

s8, blanking: and (3) sucking and discharging by using an automatic discharging robot and a matched sucking disc, and feeding by using a conveying line, thereby completing the whole process of the automatic forming method of the U-shaped box shell of the refrigerator.

2. The automatic forming method of U-shaped refrigerator shell as claimed in claim 1, wherein in the step of S5 online detection, the sheet metal online detection technique is to use LED light source to irradiate the punched finished sheet in a forward mode, the reflected light enters the camera and converts the optical image into digital signal, then the digital processing module is used to compare the digital signal, the standard is divided according to the preset quality defect of the sheet metal, so as to identify whether the sheet metal has defect, after the data comparison, the unqualified data is fed back to the system, and the adjusted parameters are verified for the second time by adjusting S4 rolling servo parameters until all the parameters are qualified and the quality of the rolled product is stable.

3. The automatic forming method of U-shaped case of refrigerator as claimed in claim 1, in the S2 servo punching step, a first shell side plate (210) and a second shell side plate (220) are respectively punched on two sides of the top shell plate (10), the left shell plate (20) and the right shell plate (30), small V-shaped notches are punched at the joints of the first shell side plate (210) of the top shell plate (10) and the first shell side plates (210) of the left shell plate (20) and the right shell plate (30) on the two sides, the joint of the second shell side plate (220) of the top shell plate (10) and the second shell side plates (220) of the left shell plate (20) and the right shell plate (30) at the two sides is punched with a large V-shaped notch, two casing sideboard two (220) in big V type breach are all die-cut to have the rectangular board, the both ends of die-cut production board all are provided with limit end plate (230).

4. The automatic forming method of U-shaped cabinet of refrigerator as claimed in claim 3, wherein in the S4 rolling step, the first shell side plate (210) of the top shell plate (10), the left shell plate (20) and the right shell plate (30) are all rolled into R-shaped structural side plate (21); r type structure sideboard (21), including connecting plate (211), R template (212), side board (213), one side of connecting plate (211), side board (213) is connected with two lower extreme border departments of R template (212) respectively, the opposite side of connecting plate (211) is connected with left casing board (20) or right casing board (30) one side, connecting plate (211), side board (213) all are perpendicular mutually with left casing board (20) and right casing board (30).

5. The automatic forming method of U-shaped case of refrigerator as claimed in claim 3, wherein in the S4 rolling step, the second shell side plates (220) of the top shell plate (10), the left shell plate (20) and the right shell plate (30) are rolled into the side plates (22) of the bayonet type structure; the side plate (22) with the clamping groove type structure comprises a first vertical plate (221), a second vertical plate (223), a horizontal plate (224), a third vertical plate (225) and a clamping side plate (226) which are sequentially connected end to end, wherein the first vertical plate (221), the second vertical plate (223) and the third vertical plate (225) are parallel to each other and are perpendicular to a left shell plate (20) and a right shell plate (30), the horizontal plate (224) is parallel to the left shell plate (20) and the right shell plate (30), one side edge of the first vertical plate (221) is connected with one side edge of the left shell plate (20) or the right shell plate (30), and the joint of the other side edge of the first vertical plate (221) and one side edge of the second vertical plate (223) adopts expansion treatment and forms a tubular expansion joint (222).

6. The automatic forming method of U-shaped refrigerator shell as claimed in claim 5, wherein in the S2 servo punching step, the two ends of the edge plate (230) at the four vertical corners of the punched product plate, the one ends of the first shell side plate (210) and the second shell side plate (220) are punched into a step-shaped structure.

7. The automatic forming method of the U-shaped cabinet of the refrigerator as claimed in claim 6, wherein in the step of S2 servo punching, the step structure of the second shell side plate (220) is punched with a notch (227) and a bolt mounting hole (2221), after the second shell side plate (220) is rolled into the side plate (22) of the snap groove type structure, the notch (227) is located on the second vertical plate (223), the bolt mounting hole (2221) is located on the first vertical plate (221), and the bolt mounting hole (2221) and the notch (227) are overlapped.

8. The automatic forming method of U-shaped refrigerator shell as claimed in claim 6, wherein in the S2 servo punching step, the punching head of the punching machine is provided with ten punching stations corresponding to P1-P10 for punching the finished plate, P1, P6 correspond to the joint of two side end plates (230) and the second housing side plate (220), P7, P10 are the joint of two side end plates (230) and the first housing side plate (210), and are all punched into a step-shaped structure; p3 and P4 correspond to two large V-shaped notches of the punched finished board respectively, P8 and P9 correspond to two small V-shaped notches of the punched finished board respectively, and P2 and P5 correspond to two shell side plates II (220) of the left shell plate (20) and the right shell plate (30) respectively and punch box shell fixing holes.

9. The automatic forming method of U-shaped refrigerator shell as claimed in claim 4, wherein in the step ZL forming and end bending at S6, the end plates (230) at the ends of the left and right shell plates (20, 30) of the punched finished plate are bent into R-shaped structure end plates (23), and the R-shaped structure end plates (23) are the same as the R-shaped structure end plates (21).

10. The method as claimed in claim 3, wherein the long laths of the second shell side panel (220) of the left and right shell panels (20, 30) are punched into the first Z-shaped laminated plate (228) by the punching machine, the long laths of the second shell side panel (220) of the top shell panel (10) are punched into the second L-shaped laminated plate (229) by the punching machine, and the first Z-shaped laminated plate (228) and the second L-shaped laminated plate (229) are laminated together after the U-bending at step S7 in the process of forming ZL at step S6.

Technical Field

The invention relates to the technical field of refrigerator equipment manufacturing, in particular to an automatic forming method of a U-shaped box shell of a refrigerator.

Background

The refrigerator shell is generally made by sheet metal forming of sheet metal, including comprehensive cold machining processes such as shearing, punching/cutting/compounding and folding, and has the disadvantages of complex process and higher requirement on intelligent degree. At present, the defects of low intelligent degree and low production efficiency exist in the refrigerator shell due to the structural limitation and the restriction of a process forming production line, the produced refrigerator shell also has the defects of poor fitting degree with a refrigerator liner, difficult combination, poor firmness, unstable structure and easy bubble leakage, and the use quality of the refrigerator is greatly reduced. Meanwhile, the physical properties of the metal plates can be changed due to different original manufacturers, the change of the parameters can influence the precision after forming in actual production, and the forming production line of the existing refrigerator shell is inconvenient to adjust the production parameters, so that the product quality is influenced.

Disclosure of Invention

The invention aims to: provides an automatic forming method of a U-shaped box shell of a refrigerator, which aims to solve the defects.

In order to achieve the above purpose, the invention provides the following technical scheme:

an automatic forming method of a U-shaped case shell of a refrigerator comprises a left shell, a top shell and a right shell, wherein the left shell and the right shell are respectively positioned on two sides of the top shell to form a U shape;

the automatic forming method of the U-shaped box shell of the refrigerator comprises the following steps:

s1, feeding: carrying out automatic feeding on a raw material steel plate meeting the requirements of the size specification through an automatic feeding machine;

s2, servo punching: installing a plurality of small punching heads through a punching machine, and performing servo electric cylinder punching on a raw material steel plate subjected to automatic feeding to manufacture a punched finished plate, wherein the punched finished plate is a three-section type straight plate consisting of a left shell plate, a top shell plate and a right shell plate;

s3, 180-degree overturning: turning the punched finished board by 180 degrees through a transition steering machine, and exchanging the front side and the back side;

s4, rolling: rolling the turned punched finished plate by a rolling mill, and respectively rolling two side edges of a left shell plate, a top shell plate and a right shell plate of the punched finished plate into an R-shaped structure side plate and a clamping groove-shaped structure side plate;

s5, online detection: the quality of the rolled punched finished plate is detected on line by adopting a metal plate on-line detection technology;

s6, ZL forming and end bending: the joint between the slot type structure side plate of the top shell plate of the punched finished board which meets the quality requirement and the slot type structure side plates of the left shell plate and the right shell plate of the punched finished board is subjected to Z bending and L bending forming by a punching machine; then, end bending is carried out on the tail ends of the left shell plate and the right shell plate of the punched finished plate through a punching machine to form an R-shaped structure edge end plate;

s7, U bending: bending and molding the die-cut finished plates subjected to ZL molding and end bending through a U bending machine, and respectively forming a left shell, a top shell and a right shell of a U-shaped box shell after bending the left shell plate, the top shell and the right shell plate to obtain the U-shaped molding box shell of the refrigerator;

s8, blanking: and (3) sucking and discharging by using an automatic discharging robot and a matched sucking disc, and feeding by using a conveying line, thereby completing the whole process of the automatic forming method of the U-shaped box shell of the refrigerator.

Preferably, in the step of S5 online inspection, the sheet metal online inspection technique is to use an LED light source to irradiate the die-cut finished sheet in a forward illumination mode, reflect light into a camera, convert an optical image into a digital signal, perform comparison processing by a digital processing module, classify a standard according to a preset quality defect of the sheet metal, thereby identifying whether the sheet metal has a defect, feed back unqualified data to the system after data comparison, and perform secondary verification on the adjusted parameters by adjusting S4 rolling servo parameters until all the parameters are qualified and the quality of the rolled product is stable.

Preferably, in the step of S2 servo punching, a first shell side plate and a second shell side plate are respectively punched on two sides of the top shell plate, the left shell plate and the right shell plate, a small V-shaped notch is punched at a joint of the first shell side plate of the top shell plate and the first shell side plates of the left shell plate and the right shell plate on the two sides, a large V-shaped notch is punched at a joint of the second shell side plate of the top shell plate and the second shell side plates of the left shell plate and the right shell plate on the two sides, long strips are punched on the two shell side plates in the large V-shaped notch, and end plates are arranged at two ends of the punched finished product plate;

preferably, in the rolling step of S4, the first shell side plates of the top shell plate, the left shell plate and the right shell plate are all rolled into R-shaped structural side plates; the R-shaped structure side plate comprises a first connecting plate, an R-shaped plate and a side plate, wherein one side of the first connecting plate and one side of the side plate are respectively connected with the edges of the two lower ends of the R-shaped plate, the other side of the first connecting plate is connected with one side edge of the left shell plate or the right shell plate, and the first connecting plate and the side plate are perpendicular to the left shell plate and the right shell plate.

Preferably, in the S4 rolling step, the second shell side plates of the top shell plate, the left shell plate and the right shell plate are rolled into the side plates of the bayonet type structure; the clamping groove type structure side plate comprises a first vertical plate, a second vertical plate, a horizontal plate, a third vertical plate and a clamping side plate which are sequentially connected end to end, wherein the first vertical plate, the second vertical plate and the three vertical plates are parallel to each other and are perpendicular to a left shell plate and a right shell plate, the horizontal plate is parallel to the left shell plate and the right shell plate, one side edge of each vertical plate is connected with one side edge of the left shell plate or the right shell plate, and the other side edge of each vertical plate and the connection position of one side edge of the second vertical plate adopt expansion treatment to form a tubular expansion joint.

Preferably, in the S2 servo punching step, both ends of the edge plates at the four vertical corners of the punched finished plate, and one end of the first shell edge plate and one end of the second shell edge plate are all punched into a step-shaped structure.

Preferably, in the step punching step of S2, a notch and a bolt mounting hole are punched at the step-shaped structure of the second side plate of the housing, after the two side plates of the housing are rolled into the side plate of the slot-shaped structure, the notch is located on the second vertical plate, the bolt mounting hole is located on the first vertical plate, and the bolt mounting hole and the notch are overlapped together.

Preferably, in the S2 servo punching step, ten punching heads of the punching machine are provided, which correspond to ten punching stations P1-P10 for punching the finished board respectively, P1 and P6 correspond to joints between two side end plates and a second housing side plate respectively, and P7 and P10 are joints between two side end plates and a first housing side plate respectively, and are all punched into a step-shaped structure; p3 and P4 correspond to two large V-shaped notches of the punched finished board respectively, P8 and P9 correspond to two small V-shaped notches of the punched finished board respectively, and P2 and P5 correspond to two shell side plates II of the left shell plate and the right shell plate respectively and punch box shell fixing holes.

Preferably, in the ZL forming and end bending process of step S6, the edge end plate ends at the ends of the left shell plate and the right shell plate of the die-cut finished plate are bent into R-shaped structure edge end plates, where the R-shaped structure edge end plates have the same structure as the R-shaped structure edge plates.

Preferably, in the process of ZL forming and end bending in the step S6, the long laths on the second shell side plates of the left shell plate and the right shell plate are all punched into the first Z-shaped laminated slab by a punch, the long laths on the second shell side plate of the top shell plate are punched into the second L-shaped laminated slab by a punch, and the first Z-shaped laminated slab and the second L-shaped laminated slab are laminated together after U bending in the step S7.

The invention has the beneficial effects that:

the automatic forming method of the U-shaped box shell of the refrigerator is simple in process, realizes automatic forming production of the U-shaped box shell of the refrigerator through the steps of feeding, servo punching, 180-degree overturning, rolling, online detection, ZL forming, end bending, U bending, blanking and the like, and is good in intelligent degree and high in production efficiency; the rolled product can be detected on line through rolling and on-line detection, and rolling parameters can be adjusted in time, so that the product quality is improved, and the operation is convenient; the U-shaped case shell of the produced refrigerator is tightly attached to the inner container of the refrigerator through the R-shaped structure side plates, the clamping groove-shaped structure side plates and the R-shaped structure side end plates at two ends of the U-shaped case shell, the U-shaped case shell is convenient to assemble, good in firmness and stable in structure, and the use quality of the refrigerator is greatly improved.

Drawings

FIG. 1: the process flow diagram of the invention;

FIG. 2: the invention is a schematic structural diagram of a punched finished plate;

FIG. 3: the invention discloses a structural schematic diagram of a U-shaped box shell of a refrigerator;

FIG. 4: the structure at A in FIG. 3 is enlarged;

FIG. 5: the structure at B in FIG. 3 is enlarged;

FIG. 6: the structure at C in FIG. 3 is enlarged;

FIG. 7: the structure at D is enlarged in FIG. 3.

Detailed Description

The following description of the embodiments of the present invention is made with reference to the accompanying drawings 1 to 7:

as shown in fig. 1-7, an automatic forming method for a U-shaped refrigerator case of a refrigerator comprises the steps of feeding, servo punching, 180-degree turning, rolling, online detection, ZL forming, end bending, U bending, blanking and the like, and realizes automatic forming production of the U-shaped refrigerator case of the refrigerator.

The U-shaped refrigerator shell consists of a left shell 2, a top shell 1 and a right shell 3, wherein the left shell 2 and the right shell 3 are respectively positioned on two sides of the top shell 1 to form a U shape, two sides of the top shell 1, the left shell 2 and the right shell 3 are respectively provided with an R-shaped structure side plate 21 and a clamping groove-shaped structure side plate 22, and the tail ends of the left shell 2 and the right shell 3 of the U-shaped refrigerator shell are provided with R-shaped structure side plates 23;

the automatic forming method of the U-shaped box shell of the refrigerator specifically comprises the following steps:

s1, feeding: and carrying out automatic feeding on the raw material steel plate meeting the requirements of the size specification through an automatic feeding machine.

S2, servo punching: and installing a plurality of small punching heads through a punching machine, and punching the raw material steel plate subjected to automatic feeding by using a servo electric cylinder to manufacture a punched finished plate.

In the servo punching step, the punched finished plate is a three-section straight plate consisting of a left shell plate 20, a top shell plate 10 and a right shell plate 30. Top shell board 10, left shell body board 20, and the both sides of right shell body board 30 are equallyd divide do not die-cut have casing sideboard a 210, casing sideboard two 220, the junction of casing sideboard a 210 of top shell board 10 and the left shell body board 20 of both sides, the casing sideboard a 210 of right shell body board 30 is all die-cut to have little V type breach, the casing sideboard two 220 of top shell board 10 and the left shell body board 20 of both sides, the junction of casing sideboard two 220 of right shell body board 30 is all die-cut to have big V type breach, all die-cut long lath on two casing sideboard two 220 in big V type breach, the both ends of die-cut finished product board all are provided with limit end plate 230. Two ends of the edge end plate 230 at four vertical corners of the finished plate, one end of the first shell edge plate 210 and one end of the second shell edge plate 220 are all punched into a step-shaped structure.

In the S2 servo blanking step, a notch 227 and a bolt mounting hole 2221 are blanked at the step-shaped structure of the second casing side plate 220, after the second casing side plate 220 is rolled into the side plate 22 with the snap-in groove structure, the notch 227 is located on the second vertical plate 223, the bolt mounting hole 2221 is located on the first vertical plate 221, and the bolt mounting hole 2221 and the notch 227 are overlapped.

In the servo punching step, ten punching heads of the punching machine are arranged and respectively correspond to ten punching stations P1-P10 for punching finished boards, P1 and P6 respectively correspond to the joints of the two side end plates 230 and the shell side plate II 220, and P7 and P10 respectively correspond to the joints of the two side end plates 230 and the shell side plate I210 and are both punched into a step-shaped structure; the P3 and the P4 correspond to two large V-shaped notches of the punched finished board respectively, the P8 and the P9 correspond to two small V-shaped notches of the punched finished board respectively, and the P2 and the P5 correspond to the two second shell side plates 220 of the left shell plate 20 and the right shell plate 30 respectively and punch a box shell fixing hole.

S3, 180-degree overturning: turning the punched finished board by 180 degrees through a transition steering machine, and exchanging the front side and the back side;

s4, rolling: rolling the turned punched finished plate by a rolling mill, and respectively rolling two side edges of a left shell plate 20, a top shell plate 10 and a right shell plate 30 of the punched finished plate into an R-shaped structural side plate 21 and a clamping groove-shaped structural side plate 22;

in the rolling step, the first shell side plates 210 of the top shell plate 10, the left shell plate 20 and the right shell plate 30 are all rolled into the R-shaped structural side plate 21. The R-shaped structure side plate 21 comprises a first connecting plate 211, an R-shaped plate 212 and a side plate 213, one side of the first connecting plate 211 and one side of the side plate 213 are respectively connected with the edges of the two lower ends of the R-shaped plate 212, the other side of the first connecting plate 211 is connected with one side of the left shell body plate 20 or the right shell body plate 30, and the first connecting plate 211 and the side plate 213 are perpendicular to the left shell body plate 20 and the right shell body plate 30.

In the rolling step, the second shell side plates 220 of the top shell plate 10, the left shell plate 20 and the right shell plate 30 are rolled into the side plates 22 with the notch-shaped structures. The side plate 22 with the slot-type structure comprises a first vertical plate 221, a second vertical plate 223, a horizontal plate 224, a third vertical plate 225 and a clamping side plate 226 which are sequentially connected end to end, wherein the first vertical plate 221, the second vertical plate 223 and the third vertical plate 225 are parallel to each other and are perpendicular to the left shell plate 20 and the right shell plate 30, the horizontal plate 224 is parallel to the left shell plate 20 and the right shell plate 30, one side edge of the first vertical plate 221 is connected with one side edge of the left shell plate 20 or the right shell plate 30, and the joint of the other side edge of the first vertical plate 221 and one side edge of the second vertical plate 223 is subjected to expansion treatment to form a tubular expansion joint 222.

S5, online detection: and (3) carrying out online detection on the quality of the rolled punched finished plate by adopting a metal plate online detection technology.

In the online detection step, an LED light source is utilized to irradiate the punched finished plate in a front-lighting mode, reflected light enters a camera, an optical image is converted into a digital signal, the digital signal is compared by a digital processing module, the standard is divided according to the preset quality defect of the metal plate, whether the metal plate has defects is identified, unqualified data is fed back to a system after data comparison, and secondary verification is carried out on the adjusted parameters by adjusting S4 rolling servo parameters until all the parameters are qualified and the quality of the rolled product is stable.

S6, ZL forming and end bending: the joint between the clamping groove type structure side plate 22 of the top shell plate 10 of the punching finished plate meeting the quality requirement and the clamping groove type structure side plate 22 of the left shell plate 20 and the right shell plate 30 is subjected to ZL bending forming by a punching machine; and then, end bending is carried out on the tail ends of the left shell plate 20 and the right shell plate 30 of the punched finished plate through a punching machine to form an R-shaped structure side end plate 23.

In the ZL forming and end bending process in this step, the end plates 230 at the ends of the left shell plate 20 and the right shell plate 30 of the punched finished plate are bent into the R-shaped structure end plate 23, and the R-shaped structure end plate 23 and the R-shaped structure end plate 21 have the same structure. Meanwhile, the long strips on the second shell side plate 220 of the left shell plate 20 and the right shell plate 30 are punched and formed into the first Z-shaped laminated plate 228 by a punching machine, and the long strips on the second shell side plate 220 of the top shell plate 10 are punched and formed into the second L-shaped laminated plate 229 by the punching machine.

S7, U bending: bending and molding the die-cut product plates with ZL molded and bent ends by a U bending machine, bending the left shell plate 20, the top shell plate 10 and the right shell plate 30 to form a left shell 2, a top shell 1 and a right shell 3 of a U-shaped box shell respectively so as to manufacture the U-shaped molding box shell of the refrigerator, and folding the Z-shaped laminated plate I228 and the L-shaped laminated plate II 229 together after U bending.

S8, blanking: and (3) sucking and discharging by using an automatic discharging robot and a matched sucking disc, and feeding by using a conveying line, thereby completing the whole process of the automatic forming method of the U-shaped box shell of the refrigerator.

The automatic forming method of the U-shaped box shell of the refrigerator is simple in process, realizes automatic forming production of the U-shaped box shell of the refrigerator through the steps of feeding, servo punching, 180-degree overturning, rolling, online detection, ZL forming, end bending, U bending, blanking and the like, and is good in intelligent degree and high in production efficiency; the rolled product can be detected on line through rolling and on-line detection, and rolling parameters can be adjusted in time, so that the product quality is improved, and the operation is convenient; the U-shaped case shell of the produced refrigerator is tightly attached to the inner container of the refrigerator through the R-shaped structure side plates, the clamping groove-shaped structure side plates and the R-shaped structure side end plates at two ends of the U-shaped case shell, the U-shaped case shell is convenient to assemble, good in firmness and stable in structure, and the use quality of the refrigerator is greatly improved.

The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to adopt such insubstantial modifications of the inventive concept and solution, or to apply the inventive concept and solution directly to other applications without such modifications.