A CNC forming device for the labyrinth groove of the end of the refrigerator shell

Abstract

The present invention relates to the field of automated production, and in particular to a CNC forming device for a labyrinth groove type at the end of a refrigerator shell. The CNC forming device for a labyrinth groove type at the end of a refrigerator shell comprises: a bed, a conveying assembly, two sets of symmetrically installed single-side end folding assemblies, a pressing assembly, a side positioning assembly, and a front positioning assembly. The present invention can fold out complex grooves, and the bent sheet can be conveyed to the next station along the length direction of the sheet through a synchronous belt, or can be conveyed to the next station along the width direction through a gripper or a suction cup, providing more options for the layout of the production line.

Description

Technical Field

[0001] The invention relates to the field of automated production, and in particular to a numerical control molding device for a labyrinth groove at an end of a refrigerator shell. Background Art

[0002] With the development of manufacturing industry and the improvement of people's living standards in the past 30 years, people's demand for home appliances has continued to increase, and my country's refrigerator and freezer manufacturing industry has gradually grown from weak to strong. At present, the mainstream production technology of domestic freezer shells is to combine two plates (back plate and enclosure) into a mold. Therefore, in the processing of the freezer enclosure, it is necessary to process the two ends of the freezer enclosure into a "J"-shaped groove. When processing the end maze groove of the freezer enclosure, the traditional freezer shell production line uses a cylinder to drive the upper and lower molds to press the "J"-shaped groove into shape. The disadvantages of this method are:

[0003] (1) When the original sheet material of the refrigerator shell changes, the size of the extruded "X"-shaped groove changes greatly, and the consistency and reliability of the quality of the refrigerator shell cannot be guaranteed;

[0004] (2) The oil cylinder can only drive the mold to move in a single direction, so the shape and size of the pressed groove cannot be adjusted;

[0005] (3) The mold shape is single and solid, which cannot meet the customer's needs for flexible production of maze groove size and shape.

[0006] Therefore, a CNC forming device is needed that can be used to fold the edges of flat sheet materials into complex grooves. Summary of the invention

[0007] The technical problem to be solved by the present invention is: to provide a CNC forming device for the labyrinth groove type at the end of the refrigerator shell, which can fold out complex groove types. The bent sheet material can be transported to the next station along the length direction of the sheet material through a synchronous belt, or can be transported to the next station along the width direction through a gripper or a suction cup, providing more options for the layout of the production line.

[0008] The present invention provides a CNC forming device for a labyrinth groove type of a refrigerator shell end, comprising: a bed, a conveying assembly, two sets of symmetrically installed single-side end folding assemblies, a pressing assembly, a side positioning assembly and a rear push assembly, wherein:

[0009] The bed is movably connected to the single-side end folding assembly, and the single-side end folding assembly moves along the bed;

[0010] The conveying assembly is symmetrical in structure, and includes a fixed wheel frame assembly, a first movable wheel frame assembly, a second movable wheel frame assembly, a reduction motor, a sprocket assembly and a synchronous belt, wherein the fixed wheel frame assembly is symmetrically mounted on both sides of the bed; the first movable wheel frame assembly and the second movable wheel frame assembly are both mounted on the single-side end folding assembly and move with it; the reduction motor is mounted on the discharge side of the bed to provide power for the conveying assembly; the reduction motor transmits power to the synchronous belt wound along the fixed wheel frame assembly, the first movable wheel frame assembly and the second movable wheel frame assembly through the sprocket assembly connected thereto;

[0011] The single-side end folding assembly comprises a bending frame, a door-type frame, an upper pressing knife servo adjustment assembly, an upper pressing knife assembly, a pad knife, a bending knife assembly, a bending knife motion bracket, a horizontal servo adjustment assembly and a vertical servo adjustment assembly, wherein the door-type frame is mounted on the bending frame; the upper pressing knife servo motor in the upper pressing knife servo adjustment assembly is mounted on the door-type frame, the motor output shaft is connected to the upper pressing knife lead screw through a coupling, and the upper pressing knife screw nut is directly screwed on the upper pressing knife assembly; the upper pressing knife assembly comprises an upper pressing knife mounting frame, an automatic tool changing module, a tool changing motor and a reducer and an upper pressing knife, Among them, the upper pressure knife mounting frame is connected to the upper pressure knife nut, and the upper pressure knife mounting frame slides relatively on the door-type frame; the automatic tool changing module is screwed to the upper pressure knife mounting frame, and its central axis is directly connected to the tool changing motor and reducer, and the upper pressure knife is directly installed on the automatic tool changing module; the pad knife is screwed to the bending frame; the bending knife assembly includes a bending knife and a bending knife seat, and the bending knife is installed on the bending knife seat; the horizontal servo adjustment assembly includes a horizontal adjustment motor and reducer, a horizontal motor mounting seat, a horizontal lead screw support seat, a water The horizontal adjustment screw, the horizontal adjustment nut and the horizontal nut seat, wherein the horizontal adjustment motor and the reducer are installed on the bending knife motion bracket through the horizontal motor mounting seat, the horizontal screw support seat is installed on the horizontal motor mounting seat to provide support force for the horizontal adjustment screw, the horizontal adjustment nut is connected to the bending knife assembly through the horizontal nut seat, and the bending knife assembly moves relative to the bending knife motion bracket under the drive of the horizontal adjustment motor and the reducer; the vertical servo adjustment assembly includes a vertical adjustment motor and reducer, a vertical motor mounting seat, a vertical screw A rod support seat, a vertical adjustment screw, a vertical adjustment nut and a vertical nut seat, wherein the vertical adjustment motor and the reducer are installed on the bending machine frame through the vertical motor mounting seat, the vertical screw support seat is installed on the vertical motor mounting seat to provide support force for the vertical adjustment screw, the vertical adjustment nut is connected to the bending knife motion bracket through the vertical nut seat, and the bending knife motion bracket, driven by the vertical adjustment motor and the reducer, moves linearly along the guide rail d installed on the bending machine frame via the slider d installed on the back of the bending knife motion bracket;

[0012] The material pressing assembly comprises a material pressing support, a material pressing lower pad, a material pressing cylinder and a material pressing block, wherein the material pressing support is mounted on the bed, the material pressing lower pad and the material pressing cylinder are respectively mounted on the material pressing support one above and one below, and the material pressing block is connected to the connecting rod of the material pressing cylinder;

[0013] The side positioning assembly includes a side positioning baffle bracket, a side positioning baffle, a side push bracket, a side push cylinder support, a side push cylinder, a side push roller support and a side push roller, wherein the side positioning baffle bracket and the side push bracket are both mounted on the bending machine frame, the side positioning baffle is fixed to the side positioning baffle bracket, the side push cylinder support is mounted on the side push bracket, both ends of the side push cylinder are mounted on the side push cylinder support, the side push roller support is connected to the cylinder connector of the side push cylinder, the side push roller is mounted on the side push roller support, and driven by the side push cylinder, it performs linear motion along the guide rail e via the slider e;

[0014] The back-pushing assembly includes a back-pushing bracket, a back-pushing cylinder, a positioning tongue, a tongue connecting plate and a limiting rod, wherein the back-pushing bracket is installed on the side of the single-sided end folding assembly on the feeding side, the back-pushing cylinder is installed on the back-pushing bracket, the positioning tongue is connected to the cylinder connecting head of the back-pushing cylinder through the tongue connecting plate, the limiting rod is installed on the back-pushing bracket, and the position of the lower surface of the limiting rod is higher than the highest vertical edge of the sheet material.

[0015] Preferably, the bed is welded from I-beams and steel plates.

[0016] Preferably, a guide rail a and an adjustment component a are installed on the bed, and two groups of the servo adjustment components a are respectively connected to the bottom plate of the single-sided end folding component, so that the single-sided end folding component installed on both sides of the bed can make a linear motion along the guide rail a through sliders a installed on both sides of the lower surface of its bottom plate.

[0017] Preferably, the bending frame is a bottom frame welded from steel plates.

[0018] Preferably, the number and arrangement intervals of the synchronous belts are determined according to the height of the refrigerator.

[0019] Preferably, the number of the upper pressing knives in the upper pressing knife assembly is determined according to the process.

[0020] Preferably, the actions of the CNC forming equipment for the labyrinth groove at the end of the refrigerator shell are all controlled by PLC.

[0021] Preferably, a slider b is provided on the back of the upper pressing knife installation frame, a guide rail b is provided on the door-type frame, and the upper pressing knife servo motor drives the upper pressing knife installation frame to perform linear motion along the guide rail b.

[0022] Preferably, the bending knife assembly comprises a bending knife and a bending knife seat, and the bending knife is mounted on the bending knife seat;

[0023] The horizontal adjustment nut is connected to the bending knife seat through the horizontal nut seat.

[0024] Preferably, the bending knife assembly, driven by the horizontal adjustment motor and the reducer, moves linearly along a guide rail c installed on the bending knife motion bracket via a slider c installed on the lower surface of the bending knife seat.

[0025] Compared with the prior art, the CNC forming equipment for the labyrinth groove of the refrigerator shell end of the present invention is servo-controlled throughout the short side bending process of the refrigerator shell, and the bending action is accurate and reliable. The design of the positioning and pressing components also ensures the reliability and consistency of the sheet processing effect. The bent sheet can be conveyed to the next station along the length direction of the sheet through a synchronous belt, or conveyed to the next station along the width direction through a gripper or suction cup, providing more options for the layout of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 An isometric view of a CNC machine for forming a labyrinth groove pattern for a freezer case end cap;

[0027] Figure 2 A cross-sectional view showing a single-side end fold assembly;

[0028] Figure 3 An isometric view showing a single-sided end fold assembly;

[0029] Figure 4 A schematic diagram showing the structure of a pressing assembly;

[0030] Figure 5 A schematic diagram showing the structure of a side positioning assembly;

[0031] Figure 6 A schematic diagram showing the structure of the pushback assembly;

[0032] Figure 7 It shows the schematic diagram of assembling the enclosure and back panel of the refrigerator;

[0033] Figure 8 A partial enlarged view showing the bending shape of the end of the refrigerator enclosure. DETAILED DESCRIPTION

[0034] In order to further understand the present invention, the embodiments of the present invention are described below in conjunction with examples, but it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the present invention.

[0035] The embodiment of the present invention discloses a CNC forming device for a labyrinth groove type of a refrigerator shell end, comprising: a bed 1, a conveying assembly 2, two sets of symmetrically installed single-side end folding assemblies 3, a pressing assembly 4, a side positioning assembly 5 and a rear push assembly 6, wherein:

[0036] The bed 1 is movably connected to the single-side end folding assembly 3, and the single-side end folding assembly 3 moves along the bed 1;

[0037] The conveying assembly 2 is symmetrical in structure, and includes a fixed wheel frame assembly 10, a first movable wheel frame assembly 11, a second movable wheel frame assembly 12, a reduction motor 13, a sprocket assembly 14 and a synchronous belt 15, wherein the fixed wheel frame assembly 10 is symmetrically mounted on both sides of the bed 1; the first movable wheel frame assembly 11 and the second movable wheel frame assembly 12 are both mounted on the single-side end folding assembly 3 and move with it; the reduction motor 13 is mounted on the discharge side of the bed 1 to provide power for the conveying assembly 2; the reduction motor 13 transmits power to the synchronous belt 15 wound along the fixed wheel frame assembly 10, the first movable wheel frame assembly 11 and the second movable wheel frame assembly 12 through the sprocket assembly 14 connected thereto;

[0038] The single-side end folding assembly 3 includes a bending frame 16, a door-type frame 17, an upper pressing knife servo adjustment assembly 18, an upper pressing knife assembly 19, a pad knife 20, a bending knife assembly 21, a bending knife motion bracket 22, a horizontal servo adjustment assembly 23 and a vertical servo adjustment assembly 24. The door-type frame 17 is installed on the bending frame 16; the upper pressing knife servo motor 25 in the upper pressing knife servo adjustment assembly 18 is installed on the door-type frame 17, and the motor output shaft is connected to the upper pressing knife lead screw 27 through a coupling 26, and the upper pressing knife nut 28 is directly screwed on the upper pressing knife assembly 19; the upper pressing knife assembly 19 includes an upper pressing knife mounting frame 29, an automatic tool changing module 30, a tool changing motor and reducer 31 and upper pressing knife 32, wherein the upper pressing knife mounting frame 29 is connected to the upper pressing knife nut 28, and the upper pressing knife mounting frame 29 slides relatively on the door-type frame 17; the automatic tool changing module 30 is screwed to the upper pressing knife mounting frame 29, and its central axis 35 is directly connected to the tool changing motor and reducer 31, and the upper pressing knife 32 is directly mounted on the automatic tool changing module 30; the pad knife 20 is screwed to the bending frame 16; the bending knife assembly 21 includes a bending knife 36 and a bending knife seat 37, and the bending knife 36 is mounted on the bending knife seat 37; the horizontal servo adjustment assembly 23 includes a horizontal adjustment motor and reducer 38, A horizontal motor mounting seat 39, a horizontal screw support seat 40, a horizontal adjustment screw 41, a horizontal adjustment nut 42 and a horizontal nut seat 43, wherein the horizontal adjustment motor and reducer 38 are installed on the bending knife motion bracket 22 through the horizontal motor mounting seat 39, the horizontal screw support seat 40 is installed on the horizontal motor mounting seat 39 to provide support force for the horizontal adjustment screw 41, the horizontal adjustment nut 42 is connected to the bending knife assembly 21 through the horizontal nut seat 43, and the bending knife assembly 21 moves relative to the bending knife motion bracket 22 under the drive of the horizontal adjustment motor and reducer 38; the vertical servo adjustment assembly 24 includes a vertical adjustment The whole motor and reducer 46, the vertical motor mounting seat 47, the vertical screw support seat 48, the vertical adjustment screw 49, the vertical adjustment nut 50 and the vertical nut seat 51, wherein the vertical adjustment motor and reducer 46 are installed on the bending frame 16 through the vertical motor mounting seat 47, the vertical screw support seat 48 is installed on the vertical motor mounting seat 47 to provide support force for the vertical adjustment screw 49, the vertical adjustment nut 50 is connected to the bending knife motion bracket 22 through the vertical nut seat 51, and the bending knife motion bracket 22 is driven by the vertical adjustment motor and reducer 46, and moves linearly along the guide rail d 53 installed on the bending frame 16 via the slider d 52 installed on the back of the bending knife motion bracket 22;

[0039] The press assembly 4 includes a press support 54, a press lower pad 55, a press cylinder 56 and a press block 57, wherein the press support 54 is installed on the bed 1, the press lower pad 55 and the press cylinder 56 are installed on the press support 54 one above and one below respectively, and the press block 57 is connected to the connecting rod of the press cylinder 56;

[0040] The side positioning assembly 5 includes a side positioning baffle bracket 58, a side positioning baffle 59, a side push bracket 60, a side push cylinder support 61, a side push cylinder 62, a side push roller support 63 and a side push roller 64, wherein the side positioning baffle bracket 58 and the side push bracket 60 are both mounted on the bending machine frame 16, the side positioning baffle 59 is fixed on the side positioning baffle bracket 58, the side push cylinder support 61 is mounted on the side push bracket 60, both ends of the side push cylinder 62 are mounted on the side push cylinder support 61, the side push roller support 63 is connected to the cylinder connector of the side push cylinder 62, and the side push roller 64 is mounted on the side push roller support 63, and driven by the side push cylinder 62, it moves linearly along the guide rail e66 via the slider e 65;

[0041] The back-pushing assembly 6 includes a back-pushing bracket 67, a back-pushing cylinder 68, a positioning tongue 69, a tongue connecting plate 70 and a limiting rod 71, wherein the back-pushing bracket 67 is installed on the side of the single-sided end folding assembly 3 on the feeding side, the back-pushing cylinder 68 is installed on the back-pushing bracket 67, the positioning tongue 69 is connected to the cylinder connecting head of the back-pushing cylinder 68 through the tongue connecting plate 70, the limiting rod 71 is installed on the back-pushing bracket 67, and the position of the lower surface of the limiting rod 71 is higher than the highest vertical edge of the sheet material.

[0042] In order to further understand the present invention, the present invention is described in detail below in conjunction with the embodiments, and the protection scope of the present invention is not limited by the following embodiments.

[0043] Example 1

[0044] A CNC forming device for a labyrinth groove of a refrigerator shell end, comprising a bed 1, a conveying assembly 2, two sets of symmetrically installed single-side end folding assemblies 3, a pressing assembly 4, a side positioning assembly 5 and a rear push assembly 6, wherein:

[0045] The bed 1 is welded from an I-beam and a steel plate, and a guide rail a (7) is installed on it. Two sets of servo adjustment components a 8 are symmetrically installed on the bottom plate of the bed 1. The two sets of servo adjustment components a 8 are respectively connected to the bottom plate of the single-side end folding component 3, so that the single-side end folding components 3 installed on both sides of the bed 1 can move linearly along the guide rail a 7 through sliders a 9 installed on both sides of the lower surface of the bottom plate;

[0046] The conveying assembly 2 is symmetrical in structure, and includes a fixed wheel frame assembly 10, a first movable wheel frame assembly 11, a second movable wheel frame assembly 12, a reduction motor 13, a sprocket assembly 14 and a synchronous belt 15, wherein the fixed wheel frame assembly 10 is symmetrically mounted on both sides of the bed 1; the first movable wheel frame assembly 11 and the second movable wheel frame assembly 12 are both mounted on the single-side end folding assembly 3 and move with it; the reduction motor 13 is mounted on the discharge side of the bed 1 to provide power for the conveying assembly 2; the reduction motor 13 transmits power to the synchronous belt 15 wound along the fixed wheel frame assembly 10, the first movable wheel frame assembly 11 and the second movable wheel frame assembly 12 through the sprocket assembly 14 connected thereto;

[0047] The single-side end folding assembly 3 includes a bending frame 16, a door-shaped frame 17, an upper pressing knife servo adjustment assembly 18, an upper pressing knife assembly 19, a pad knife 20, a bending knife assembly 21, a bending knife motion bracket 22, a horizontal servo adjustment assembly 23 and a vertical servo adjustment assembly 24, wherein the bending frame 16 is a bottom frame welded from steel plates; the door-shaped frame 17 is installed on the bending frame 16; the upper pressing knife servo motor 25 in the upper pressing knife servo adjustment assembly 18 is installed The upper press knife assembly 19 is installed on the door-type frame 17, the motor output shaft is connected to the upper press knife lead screw 27 through the coupling 26, and the upper press knife screw nut 28 is directly screwed on the upper press knife assembly 19; the upper press knife assembly 19 includes an upper press knife mounting frame 29, an automatic tool changing module 30, a tool changing motor and a reducer 31 and an upper press knife 32, wherein the upper press knife mounting frame 29 is connected to the upper press knife screw nut 28, and driven by the upper press knife servo motor 25, the slider b 33 installed on the back thereof is moved along the guide rail b installed on the door-type frame 17 34 makes linear motion, the automatic tool changing module 30 is screwed with the upper pressure knife mounting frame 29, the central axis 35 is directly connected with the tool changing motor and reducer 31, and the upper pressure knife 32 is directly mounted on the automatic tool changing module 30; the pad knife 20 is screwed on the bending frame 16; the bending knife assembly 21 includes a bending knife 36 and a bending knife seat 37, and the bending knife 36 is mounted on the bending knife seat 37; the horizontal servo adjustment assembly 23 includes a horizontal adjustment motor and reducer 38, a horizontal motor mounting seat 39, a horizontal lead screw support seat 40, a horizontal adjustment Lead screw 41, horizontal adjustment screw nut 42 and horizontal screw nut seat 43, wherein the horizontal adjustment motor and reducer 38 are installed on the bending knife motion bracket 22 through the horizontal motor mounting seat 39, the horizontal screw support seat 40 is installed on the horizontal motor mounting seat 39 to provide support force for the horizontal adjustment screw 41, the horizontal adjustment screw nut 42 is connected to the bending knife seat 37 through the horizontal screw nut seat 43, and the bending knife assembly 21, driven by the horizontal adjustment motor and reducer 38, moves linearly along the guide rail c 45 installed on the bending knife motion bracket 22 via the slider c 44 installed on the lower surface of the bending knife seat 37;The vertical servo adjustment assembly 24 includes a vertical adjustment motor and reducer 46, a vertical motor mounting seat 47, a vertical screw support seat 48, a vertical adjustment screw 49, a vertical adjustment nut 50 and a vertical nut seat 51, wherein the vertical adjustment motor and reducer 46 is mounted on the bending frame 16 through the vertical motor mounting seat 47, the vertical screw support seat 48 is mounted on the vertical motor mounting seat 47 to provide support force for the vertical adjustment screw 49, the vertical adjustment nut 50 is connected to the bending knife motion bracket 22 through the vertical nut seat 51, and the bending knife motion bracket 22, driven by the vertical adjustment motor and reducer 46, moves linearly along the guide rail d53 installed on the bending frame 16 via the slider d52 installed on the back of the bending knife motion bracket 22;

[0048] The press assembly 4 includes a press support 54, a press lower pad 55, a press cylinder 56 and a press block 57, wherein the press support 54 is installed on the bed 1, the press lower pad 55 and the press cylinder 56 are installed on the press support 54 one above and one below respectively, and the press block 57 is connected to the connecting rod of the press cylinder 56;

[0049] The side positioning assembly 5 includes a side positioning baffle bracket 58, a side positioning baffle 59, a side push bracket 60, a side push cylinder support 61, a side push cylinder 62, a side push roller support 63 and a side push roller 64, wherein the side positioning baffle bracket 58 and the side push bracket 60 are both mounted on the bending machine frame 16, the side positioning baffle 59 is fixed on the side positioning baffle bracket 58, the side push cylinder support 61 is mounted on the side push bracket 60, both ends of the side push cylinder 62 are mounted on the side push cylinder support 61, the side push roller support 63 is connected to the cylinder connector of the side push cylinder 62, and the side push roller 64 is mounted on the side push roller support 63, and driven by the side push cylinder 62, it moves linearly along the guide rail e 66 via the slider e 65;

[0050] The back-pushing assembly 6 includes a back-pushing bracket 67, a back-pushing cylinder 68, a positioning tongue 69, a tongue connecting plate 70 and a limiting rod 71, wherein the back-pushing bracket 67 is installed on the side of the single-sided end folding assembly 3 on the feeding side, the back-pushing cylinder 68 is installed on the back-pushing bracket 67, the positioning tongue 69 is connected to the cylinder connecting head of the back-pushing cylinder 68 through the tongue connecting plate 70, the limiting rod 71 is installed on the back-pushing bracket 67, and the position of the lower surface of the limiting rod 71 is higher than the highest vertical edge of the sheet material.

[0051] The number and arrangement interval of the synchronous belts 15 are determined according to the height of the refrigerator.

[0052] The number of the upper pressing blades 32 in the upper pressing blade assembly 19 is determined according to the process.

[0053] The actions of the CNC forming equipment for the labyrinth groove at the end of the refrigerator shell are all controlled by PLC.

[0054] refer to Figure 1 , 2 And 3. In the refrigerator production line, the sheet material is transported from the previous station along the material feeding direction from left to right to the CNC forming equipment used for the labyrinth groove of the refrigerator shell end, completing the bending process of the labyrinth groove of the front and rear ends of the sheet material.

[0055] During the conveying process, the reduction motor 13 in the conveying assembly 2 is activated, and the reduction motor 13 transmits power to the synchronous belt 15 wound along the fixed wheel frame assembly 10, the first movable wheel frame assembly 11, and the second movable wheel frame assembly 12 through the sprocket assembly 14 connected thereto, so as to realize the conveying action of the sheet material. According to the model of the refrigerator currently produced, the reduction motor 13 conveys the sheet material to a preset position, at which time the reduction motor 13 is deactivated to complete the feeding of the sheet material.

[0056] refer to Figure 1 and Figure 5 , activate the side push cylinder 62, retract the cylinder rod of the side push cylinder 62, and drive the side push roller 64 through the slider e 65 and the guide rail e 66 to move linearly in the direction of the side positioning baffle 59 under the drive of the cylinder connector, so that the side edge of the sheet material is pressed against the side positioning baffle 59 under the push of the side push roller 64, thereby completing the side positioning of the sheet material.

[0057] refer to Figure 1 , Figure 2 and Figure 6 The push-back assembly 6 is installed on the side of the single-side end folding assembly 3 on the feeding side. When the sheet enters the CNC forming equipment for the labyrinth groove type of the refrigerator shell end, and passes through the push-back assembly 6, the push-back cylinder 68 is in a retracted state. At this time, the positioning tongue 69 hits the limit rod 71 during its retraction process, thereby presenting a lifted state, and the position of the lower surface of the limit rod 71 is higher than the highest vertical edge height of the sheet, so it will not interfere with the feeding process. When the sheet completes the side positioning, the push-back cylinder 68 is activated, which drives the positioning tongue 69 to be pushed forward. In the process of the push-back cylinder 68 being pushed into place, the positioning tongue 69 is affected by gravity to become a vertical state, pushing the rear end edge of the sheet forward until the front end edge of the sheet abuts against the blade face vertical surface of the bending knife 36 in the raised state, completing the positioning of the sheet.

[0058] refer to Figure 1 and Figure 4At this time, the pressing cylinder 56 is activated, and the pressing block 57 moves downward under the drive of the pressing cylinder 56, pressing the sheet material onto the pressing lower pad 55, and then the side push cylinder 62 and the rear push cylinder 68 are reset, and the bending knife 36 returns to the preset position, completing all the positioning actions of the sheet material.

[0059] refer to Figures 1 to 3 , the upper press knife servo motor 25 in the upper press knife servo adjustment assembly 18 is activated, which drives the upper press knife assembly 19 through the upper press knife lead screw 27 and the upper press knife screw nut 28 to move downward along the guide rail b 34 installed on the door-type frame 17 via the slider b 33 installed on the back thereof, until the upper press knife 32 installed on the automatic tool change module 30 presses the sheet material onto the pad knife 20, and then the upper press knife servo motor 25 is deactivated. According to the bending labyrinth groove type, the horizontal servo adjustment assembly 23 and the vertical servo adjustment assembly 24 are activated alternately or simultaneously to drive the bending knife 36 to move along any preset trajectory. Specifically, when the horizontal servo adjustment component 23 is enabled, the horizontal adjustment motor and the reducer 38 work, so that the horizontal adjustment screw 41 converts the rotational motion of the motor shaft into the linear motion of the horizontal adjustment nut 42, and the bending knife seat 37 is connected to the horizontal adjustment nut 42 through the horizontal nut seat 43. The bending knife 36 is installed on the bending knife seat 37, so the bending knife 36 can achieve horizontal movement along the guide rail d 45 installed on the bending knife motion bracket 22 through the slider d 44 installed on the lower surface of the bending knife seat 37; when the vertical servo adjustment component 24 is enabled, the vertical adjustment motor and the reducer 46 work, so that the vertical adjustment screw 49 converts the rotational motion of the motor shaft into the linear motion of the vertical adjustment nut 50, and the bending knife motion bracket 22 is connected to the vertical adjustment nut 50 through the vertical nut seat 51, so the bending knife motion bracket 22 can achieve horizontal movement along the guide rail d 45 installed on the bending machine frame 16 through the slider d 52 installed on the back thereof. 53 realizes vertical movement.

[0060] The entire bending action of the bending knife 36 is completed by activating the horizontal servo adjustment assembly 23 and the vertical servo adjustment assembly 24 alternately or simultaneously.

[0061] Subsequently, the bending knife 36 is moved to a position where the material is not affected, and the upper pressing knife servo adjustment assembly 18 is activated to reverse the upper pressing knife servo motor 25, so that the upper pressing knife 32 is lifted to the initial position. The pressing cylinder 56 is deactivated to reset the pressing block 57. The reduction motor 13 is continuously activated to continue to convey the sheet material to the next station along its length direction.

[0062] In other embodiments, a plurality of upper pressing knives 32 may be installed on the automatic tool changing module 30. When a different upper pressing knife 32 is needed, the tool changing motor and reducer 31 are activated, and the central axis of the automatic tool changing module 30 directly connected thereto starts to rotate under the drive of the motor shaft. When the required upper pressing knife 32 rotates to the 6 o'clock position, the tool changing motor and reducer 31 are deactivated. The shapes of each upper pressing knife 32 installed on the automatic tool changing module 30 are different, which provides more forming parameters for the folding of the bending labyrinth groove.

[0063] The back plate and the enclosure plate of the refrigerator prepared by the present invention are as follows: Figure 7 and 8 shown.

[0064] The above embodiments are only used to help understand the method and core idea of ​​the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0065] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A CNC forming device for the labyrinth groove of the end of a refrigerator shell, characterized in that: include: A bed (1), a conveying assembly (2), two sets of symmetrically installed single-side end folding assemblies (3), a material pressing assembly (4), a side positioning assembly (5) and a rear push assembly (6), wherein: The bed (1) is movably connected to the single-side end folding assembly (3), and the single-side end folding assembly (3) moves along the bed (1); The conveying assembly (2) is symmetrical in structure, and comprises a fixed wheel frame assembly (10), a first movable wheel frame assembly (11), a second movable wheel frame assembly (12), a reduction motor (13), a sprocket assembly (14) and a synchronous belt (15), wherein the fixed wheel frame assembly (10) is symmetrically mounted on both sides of the bed (1); the first movable wheel frame assembly (11) and the second movable wheel frame assembly (12) are both mounted on the single-side end folding assembly (3) and move therewith; the reduction motor (13) is mounted on the discharge side of the bed (1) to provide power for the conveying assembly (2); the reduction motor (13) transmits power to the synchronous belt (15) wound along the fixed wheel frame assembly (10), the first movable wheel frame assembly (11) and the second movable wheel frame assembly (12) through the sprocket assembly (14) connected thereto; The single-side end folding assembly (3) comprises a bending frame (16), a door-shaped frame (17), an upper pressing knife servo adjustment assembly (18), an upper pressing knife assembly (19), a pad knife (20), a bending knife assembly (21), a bending knife motion bracket (22), a horizontal servo adjustment assembly (23) and a vertical servo adjustment assembly (24), wherein the door-shaped frame (17) is mounted on the bending frame (16); an upper pressing knife servo motor (25) in the upper pressing knife servo adjustment assembly (18) is mounted on the door-shaped frame (17), and the motor output shaft is connected to the upper pressing knife thread through a coupling (26). The upper pressure knife assembly (19) is connected to a lever (27), and an upper pressure knife nut (28) is directly screwed on the upper pressure knife assembly (19); the upper pressure knife assembly (19) comprises an upper pressure knife mounting frame (29), an automatic knife changing module (30), a knife changing motor and a reducer (31) and an upper pressure knife (32), wherein the upper pressure knife mounting frame (29) is connected to the upper pressure knife nut (28), and the upper pressure knife mounting frame (29) slides relatively on the door-shaped frame (17); the automatic knife changing module (30) is screwed on the upper pressure knife mounting frame (29), and its central axis (35) is connected to the knife changing motor. The upper pressing knife (32) is directly connected to the automatic knife changing module (30); the pad knife (20) is screwed on the bending machine frame (16); the bending knife assembly (21) includes a bending knife (36) and a bending knife seat (37), and the bending knife (36) is installed on the bending knife seat (37); the horizontal servo adjustment assembly (23) includes a horizontal adjustment motor and a reducer (38), a horizontal motor mounting seat (39), a horizontal screw support seat (40), a horizontal adjustment screw (41), a horizontal adjustment nut (42) and a horizontal A nut seat (43), wherein the horizontal adjustment motor and reducer (38) are mounted on the bending knife motion bracket (22) via the horizontal motor mounting seat (39), the horizontal screw support seat (40) is mounted on the horizontal motor mounting seat (39) to provide support force for the horizontal adjustment screw (41), the horizontal adjustment nut (42) is connected to the bending knife assembly (21) via the horizontal nut seat (43), and the bending knife assembly (21) moves relative to the bending knife motion bracket (22) under the drive of the horizontal adjustment motor and reducer (38);The vertical servo adjustment assembly (24) comprises a vertical adjustment motor and reducer (46), a vertical motor mounting seat (47), a vertical screw support seat (48), a vertical adjustment screw (49), a vertical adjustment nut (50) and a vertical nut seat (51), wherein the vertical adjustment motor and reducer (46) is mounted on the bending frame (16) via the vertical motor mounting seat (47), the vertical screw support seat (48) is mounted on the vertical motor mounting seat (47) to provide support force for the vertical adjustment screw (49), and the vertical adjustment nut (50) is mounted on the vertical screw The female seat (51) is connected to the bending knife motion bracket (22), and the bending knife motion bracket (22) is driven by the vertical adjustment motor and the reducer (46) to perform linear motion along the guide rail d (53) installed on the bending machine frame (16) via a slider d (52) installed on the back of the bending knife motion bracket (22); a slider b (33) is provided on the back of the upper pressing knife mounting frame (29), and a guide rail b (34) is provided on the door-type frame (17); the upper pressing knife servo motor (25) drives the upper pressing knife mounting frame (29) to perform linear motion along the guide rail b (34); The material pressing assembly (4) comprises a material pressing support (54), a material pressing lower pad (55), a material pressing cylinder (56) and a material pressing block (57), wherein the material pressing support (54) is mounted on the bed (1), the material pressing lower pad (55) and the material pressing cylinder (56) are respectively mounted on the material pressing support (54) one above and one below, and the material pressing block (57) is connected to a connecting rod of the material pressing cylinder (56); The side positioning assembly (5) comprises a side positioning baffle bracket (58), a side positioning baffle (59), a side push bracket (60), a side push cylinder support (61), a side push cylinder (62), a side push roller support (63) and a side push roller (64), wherein the side positioning baffle bracket (58) and the side push bracket (60) are both mounted on the bending machine frame (16), and the side positioning baffle (59) is fixed on the side positioning baffle bracket (58). The side thrust cylinder support (61) is mounted on the side thrust bracket (60), both ends of the side thrust cylinder (62) are mounted on the side thrust cylinder support (61), the side thrust roller support (63) is connected to the cylinder connector of the side thrust cylinder (62), the side thrust roller (64) is mounted on the side thrust roller support (63), and driven by the side thrust cylinder (62), it moves linearly along the guide rail e (66) via the slider e (65); The push-back assembly (6) comprises a push-back bracket (67), a push-back cylinder (68), a positioning tongue (69), a tongue connecting plate (70) and a limiting rod (71), wherein the push-back bracket (67) is mounted on the side of the single-side end folding assembly (3) on the feeding side, the push-back cylinder (68) is mounted on the push-back bracket (67), the positioning tongue (69) is connected to the cylinder connecting head of the push-back cylinder (68) through the tongue connecting plate (70), the limiting rod (71) is mounted on the push-back bracket (67), and the position of the lower surface of the limiting rod (71) is higher than the highest vertical edge of the sheet material; The actions of the CNC forming equipment for the labyrinth groove at the end of the refrigerator shell are all controlled by PLC.

2. The CNC forming equipment for the labyrinth groove of the refrigerator shell end according to claim 1, characterized in that: The bed (1) is welded from I-beams and steel plates.

3. The CNC forming equipment for the labyrinth groove of the refrigerator shell end according to claim 2, characterized in that: A guide rail a (7) and an adjustment assembly a (8) are installed on the bed (1), and two groups of the servo adjustment assemblies a (8) are respectively connected to the bottom plate of the single-sided end folding assembly (3), so that the single-sided end folding assembly (3) installed on both sides of the bed (1) can move linearly along the guide rail a (7) through sliders a (9) installed on both sides of the lower surface of the bottom plate.

4. The CNC forming equipment for the labyrinth groove of the refrigerator shell end according to claim 1, characterized in that: The bending machine frame (16) is a bottom frame welded from steel plates.

5. The CNC forming equipment for the labyrinth groove of the refrigerator shell end according to claim 1, characterized in that: The number and arrangement interval of the synchronous belts (15) are determined according to the height of the refrigerator.

6. The CNC forming equipment for the labyrinth groove of the refrigerator shell end according to claim 1, characterized in that: The number of the upper pressing knives (32) in the upper pressing knife assembly (19) is determined according to the process.

7. The CNC forming equipment for the labyrinth groove of the refrigerator shell end according to claim 1, characterized in that: The horizontal adjustment nut (42) is connected to the bending knife seat (37) via the horizontal nut seat (43).

8. The CNC forming equipment for the labyrinth groove of the refrigerator shell end according to claim 1, characterized in that: Driven by the horizontal adjustment motor and the reducer (38), the bending knife assembly (21) moves linearly along a guide rail c (45) installed on the bending knife motion bracket (22) via a slider c (44) installed on the lower surface of the bending knife seat (37).

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