Die set for bending metal plate of refrigerator shell

Abstract

The invention discloses a die set for refrigerator shell metal plate bending, and relates to the field of die equipment, the die set comprises a pressing die and a bottom die, a die strip is arranged at the stamping end of the bottom of the pressing die, the die strip and the pressing die are connected through a sliding clamping mechanism, and the sliding clamping mechanism comprises a sliding way assembly, a locking and limiting assembly and a switching assembly. According to the refrigerator shell metal plate bending device, the die strips on the pressing die can be switched, the replaced die strips can be brought back, the whole process is easy to operate, time is saved, the whole refrigerator shell metal plate bending intermittent duration is effectively shortened, and the bending machining efficiency can be improved.

Description

[0001] This application claims the priority of a Chinese patent application titled "A Die Set for Sheet Metal Bending of Refrigerator Shell" with the application number CN202411669663.2 filed with the Chinese Patent Office on November 21, 2024. The entire content thereof is incorporated herein by reference. Technical Field

[0002] The present invention relates to the technical field of die equipment, and particularly to a die set for sheet metal bending of refrigerator shells. Background Art

[0003] Sheet metal bending of refrigerator shells is an important process in the production of refrigerators. It involves the forming and fixing of sheet metal parts. During the bending process, the bending radius is also one of the important parameters of bending, also known as the bending R angle. Since the radius parameters of the bending R angles at different parts of the refrigerator shell are different, the R angle mold strips of the used dies are also different.

[0004] Existing bending dies, such as Chinese Patent Publication No.: CN211679592U, with the patent name "A Detachable Arc Bending Die", include "an upper die and a lower die. The upper die includes a base assembly and an R die head, and the base assembly is detachably connected to the R die head; the lower die is provided with a lower die groove that cooperates with one end of the R die head.

[0005] Although the existing bending die sets can achieve the disassembly and assembly of the R angle mold strips, their disadvantage is that their fixing method is locked by bolt parts. During the actual process of replacing the R angle mold strips each time, each bolt needs to be disassembled and then installed and fixed in sequence, which takes a long time in the whole process, thus delaying the intermittent time of the sheet metal bending of the entire refrigerator shell, and further affecting the bending processing efficiency. Therefore, to solve the above problems, we propose a die set for sheet metal bending of refrigerator shells. Summary of the Invention

[0006] The purpose of the present invention is to provide a die set for sheet metal bending of refrigerator shells to solve the above-mentioned deficiencies in the prior art.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] A die set for sheet metal bending of refrigerator shells includes a pressing die and a bottom die. A mold strip is provided at the stamping end position of the bottom of the pressing die, and the mold strip is connected to the pressing die through a sliding clamping mechanism. The sliding clamping mechanism includes:

[0009] A slideway assembly, which includes a slideway groove opened at the bottom of the pressing die, and the slideway groove can be slidably clamped with the mold strip;

[0010] A locking limit component, which includes a plurality of pressing members distributed along the length direction of the sliding card slot. An arm rod extending outside the die is fixed on the pressing member, and the pressing member can clamp and limit the die bar located in the sliding card slot in the locked state;

[0011] A switching component, which includes an extension rail flush-connected to the end of the bottom die. A connection boat unit is slidably installed on the extension rail. When the connection boat unit moves forward towards the die, it can replace the die bar on the die. When the connection boat unit moves backward away from the die, it will bring back the replaced die bar.

[0012] Preferably, inner rail grooves are formed on the groove wall surfaces of the sliding card slot, and side extension bars slidably adapted to the inner rail grooves are fixed on both sides of the die bar.

[0013] Preferably, the pressing member includes an installation opening formed on the side of the die. A vertically arranged wheel column is rotatably installed in the installation opening. One side of the wheel column is fixedly connected to the arm rod through spiral penetration. The end of the arm rod extending out of the wheel column constitutes a protruding part of the wheel column. When the arm rod is perpendicular to the side of the die, the pressing member is in the locked state.

[0014] Preferably, a recessed groove communicating with the installation opening is formed on the groove wall surface of the sliding card slot. An extrusion plate is fitted and installed in the recessed groove. One side of the extrusion plate can be pushed by the protruding part of the wheel column to squeeze the die bar. The extrusion plate and the protruding part of the wheel column are connected through a reset mechanism.

[0015] Preferably, the reset mechanism includes a receiving groove formed on the side surface of the extrusion plate. The receiving groove can be slidably adapted to the protruding part of the wheel column. A spiral groove is formed on the bottom wall surface of the receiving groove parallel to the horizontal plane. A sliding column connected to the protruding part is slidably clamped in the spiral groove.

[0016] Preferably, the top of each installation opening is communicated with the bottom of the inner rail groove. A through hole is formed on the top wall surface of the receiving groove. A pin rod is movably inserted in the through hole. A plurality of support roller wheels with evenly distributed gaps are movably installed at the bottom of the side extension bar. An inclined surface for supporting the bottom end of the pin rod is formed on the top surface of the protruding part. The pin rod can be supported by the inclined surface and extend into the inner rail groove to be clamped with the gap of the corresponding support roller wheel.

[0017] Preferably, the connection boat unit includes a slider that can reciprocate on the extension rail. A stop block is fixed at one end of the top of the slider. A limit groove is formed on one side of the stop block. A long frame body is fixed at one end of the slider close to the die. A protruding component capable of applying a force to deflect the arm rod is installed on the side surface of the long frame body away from the slider.

[0018] Preferably, the protruding component includes a mounting groove opened at the top of the long frame body, a transverse tube is hinged in the mounting groove, an inner shaft is rotatably installed in the transverse tube, a first notch is opened at one end of the transverse tube located inside the long frame body, a second notch is opened at one end of the transverse tube located outside the long frame body, a first rod body fixed perpendicularly to the inner shaft is inserted into the first notch, and a second rod body fixed perpendicularly to the inner shaft is inserted into the second notch.

[0019] Preferably, a supporting component cooperating with the protruding component is movably mounted at one end of the long frame body close to the slider, and the supporting component can form a supporting portion for supporting the mold strip in the long frame body together with the protruding component in a supporting state.

[0020] Preferably, the supporting assembly includes a support plate located in the long frame, a pivot rod is fixed to the middle of the plate surface of the support plate, both ends of the pivot rod are rotatably mounted on the inner wall surface of the long frame, a top plate is fixed to the top of the support plate facing the protruding assembly, and a bottom plate is fixed to the bottom of the support plate facing away from the protruding assembly, and the support plate, top plate and bottom plate form a Z-shaped plate structure in the long frame.

[0021] In the above technical scheme, the present invention provides a mold group for bending the sheet metal of a refrigerator shell, which enables the mold strip to be installed and connected at the bottom end of the die by setting a sliding mechanism composed of a slide assembly, a locking assembly and a switching assembly, so that the mold strip on the die can be switched by reciprocating the docking boat unit in the switching assembly on the bottom die and the extension rail, and the replaced mold strip can be brought back. The whole process is simple to operate, saves time, effectively shortens the interval time of the entire refrigerator shell sheet metal bending, and helps to improve the bending processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is an overall schematic diagram of a mold set for bending sheet metal of a refrigerator shell of the present invention;

[0024] Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle;

[0025] Figure 3 It is a schematic diagram of a mold bar of a mold set for bending sheet metal of a refrigerator shell of the present invention in a slide groove;

[0026] Figure 4This is a schematic diagram of the inner rail groove of a mold set for bending sheet metal of a refrigerator shell according to the present invention;

[0027] Figure 5 It is a schematic diagram of a partial cross-section of the bottom end of a die of a die set for bending sheet metal of a refrigerator shell according to the present invention;

[0028] Figure 6 For the present invention Figure 5 Enlarged view of point B in the middle;

[0029] Figure 7 This is a schematic diagram of the inclined portion of a mold set for bending sheet metal of a refrigerator shell of the present invention on the raised portion:

[0030] Figure 8 It is a schematic diagram of a supporting component of a mold set for bending sheet metal of a refrigerator shell in the present invention in a long frame;

[0031] Figure 9 The present invention is a schematic diagram of the relative positions of an extension rail of a mold set for bending sheet metal of a refrigerator shell and a pressing mold on a machine platform.

[0032] Description of reference numerals:

[0033] 1. Pressing die; 2. Bottom die; 3. Die strip; 4. Slideway assembly; 4.1. Slide slot; 4.2. Inner rail slot; 4.3. Side extension strip; 4.4. Support roller; 5. Locking assembly; 5.1. Pressing piece; 5.11. Mounting port; 5.12. Wheel column; 5.13. Concave groove; 5.14. Extrusion plate; 5.2. Arm; 6. Switching assembly; 6.1. Extension rail; 6.2. Docking boat unit; 6.21. Sliding block; 6.22. Stopper; 6.23. Limiting groove; 6.24. Long frame; 6.3. Driving unit; 7. Raised portion; 8. Resetting mechanism; 8.1. Accommodating groove; 8.2. Convolute groove; 8.3. Sliding column; 8.4. Through hole; 8.5. Pin rod; 8.6. Inclined portion; 9. Protruding component; 9.1. Mounting groove; 9.2. Horizontal tube; 9.3. Inner shaft; 9.4. First notch; 9.5. Second notch; 9.6. First rod body; 9.7. Second rod body; 9.8. Protruding shaft column; 10. Supporting component; 10.1. Support plate; 10.2. Rotating shaft rod; 10.3. Top plate; 10.4. Bottom plate; 11. Blanking opening. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0035] See also Figures 1-9, a die set for bending the sheet metal of a refrigerator housing provided by an embodiment of the present invention includes a pressing die 1 and a bottom die 2. A die bar 3 is provided at the stamping end of the bottom of the pressing die 1. The die bar 3 is connected to the pressing die 1 through a sliding clamping mechanism. The sliding clamping mechanism includes:

[0036] A slideway assembly 4, which includes a slideway groove 4.1 opened at the bottom of the pressing die 1. The slideway groove 4.1 can be slidably clamped with the die bar 3;

[0037] A locking and limiting assembly 5, which includes a plurality of pressing members 5.1 distributed along the length direction of the slideway groove 4.1. An arm rod 5.2 extending outside the pressing die 1 is fixed on the pressing member 5.1. The pressing member 5.1 can clamp and limit the die bar 3 located in the slideway groove 4.1 in the locked state;

[0038] A switching assembly 6, which includes an extension rail 6.1 connected flush with the end of the bottom die 2. A connecting boat unit 6.2 is slidably installed on the extension rail 6.1. When the connecting boat unit 6.2 moves forward towards the pressing die 1, it can replace the die bar 3 on the pressing die 1. When the connecting boat unit 6.2 moves backward away from the pressing die 1, it will bring back the replaced die bar 3;

[0039] Specifically, the movement trajectory of the pressing die 1 is a reciprocating movement in the vertical direction. The bottom die 2 is a long strip-shaped die located directly below the pressing die 1. The die bar 3 is located at the stamping end of the bottom of the bottom die 2. The die bar 3 is a block structure with a length adapted to the bottom end length of the pressing die 1. The R angles of different die bars 3 are different, and the bending angles of the refrigerator housing after bending are also different. The length direction line of the die bar 3 is parallel to the horizontal plane during use. The pressing member 5.1 has a locked state and an unlocked state. When the pressing member 5.1 is in the unlocked state, the die bar 3 can move along the length direction of the slideway groove 4.1. When the pressing member 5.1 is in the locked state, it can clamp and limit the die bar 3 located in the slideway groove 4.1. The end of the extension rail 6.1 is connected flush with the end of the bottom die 2. A driving unit 6.3 for controlling the reciprocating movement of the connecting boat unit 6.2 is fixed on the extension rail 6.1. The driving unit 6.3 can be a linear driving device such as a telescopic cylinder or a linear rod motor;

[0040] During actual use, the die bar 3 moves with the pressing die 1 to stamp and bend the refrigerator housing on the bottom die 2. When it is necessary to replace the die bar 3 on the pressing die 1, at this time, the pressing die 1 is in the raised state separated from the bottom die 2. At this time, the die bar 3 to be replaced is placed on the connecting boat unit 6.2. At this time, the die bar 3 to be replaced moves forward with the connecting boat unit 6.2;

[0041] During the forward movement of the barge unit 6.2, the barge unit 6.2 switches the pressing member 5.1 from the locked state to the unlocked state. The die bar 3 to be replaced applies an extrusion force to the end of the die bar 3 on the press die 1, thereby extruding the die bar 3 on the press die 1 from the sliding slot 4.1. At this time, the die bar 3 to be replaced is located in the sliding slot 4.1, while the die bar 3 extruded from the sliding slot 4.1 falls on the barge unit 6.2 and is thus brought back as the barge unit 6.2 moves in the reverse direction.

[0042] During the reverse movement of the barge unit 6.2, the barge unit 6.2 switches the pressing member 5.1 from the unlocked state to the locked state, so that the die bar 3 just installed in the sliding slot 4.1 can be limited and fixed, thus completing the replacement of the die bar 3 on the press die 1. The whole process is simple to operate, saves time, effectively shortens the intermittent time of the sheet metal bending of the entire refrigerator housing, helps to improve the bending processing efficiency, and also improves the degree of automation.

[0043] In another embodiment provided by the present invention, inner rail grooves 4.2 are provided on the groove wall surfaces of the sliding slot 4.1. The inner rail grooves 4.2 and the sliding slot 4.1 form a T-shaped structure in the cross-section of the press die 1. Side extension strips 4.3 slidably adapted to the inner rail grooves 4.2 are fixed on both sides of the die bar 3. In actual use, the die bar 3 is aligned with the sliding slot 4.1, and at the same time, the inner rail grooves 4.2 are aligned with the side extension strips 4.3, and then the die bar 3 is horizontally moved and inserted into the sliding slot 4.1, so that the die bar 3 can be suspended by hanging on the inner rail grooves 4.2 through the side extension strips 4.3.

[0044] In still another embodiment provided by the present invention, the pressing member 5.1 includes a mounting opening 5.11 provided on the side surface of the press die 1. The mounting opening 5.11 is vertically communicated with the sliding slot 4.1. A vertically arranged wheel column 5.12 is rotatably installed in the mounting opening 5.11. The wheel column 5.12 can rotate axially. One side of the wheel column 5.12 is fixedly penetrated by a spiral arm rod 5.2. The axis of the arm rod 5.2 is perpendicular to the axis of the wheel column 5.12. The end of the arm rod 5.2 extending out of the wheel column 5.12 constitutes a convex portion 7 of the wheel column 5.12.

[0045] In actual use, the arm rod 5.2 can deflect with the wheel column 5.12 as the center. When the arm rod 5.2 is perpendicular to the groove side wall surface of the sliding slot 4.1, the convex portion 7 is at the position closest to the sliding slot 4.1. When the arm rod 5.2 is perpendicular to the side surface of the press die 1, the pressing member 5.1 is in the locked state. At this time, the die bar 3 is subjected to the extrusion force applied by the convex portion 7 in the sliding slot 4.1, so that the die bar 3 can be clamped and locked in the sliding slot 4.1.

[0046] Another embodiment provided by the present invention is that a recessed groove 5.13 communicating with the mounting opening 5.11 is formed on the groove wall surface of the sliding card slot 4.1. An extrusion plate 5.14 is adaptively installed in the recessed groove 5.13. The plate surface of the extrusion plate 5.14 is flush with the groove wall surface of the sliding card slot 4.1. One side of the extrusion plate 5.14 can be pushed by the protruding part 7 of the wheel column 5.12 to be extruded against the die bar 3, increasing the contact area when the die bar 3 is extruded. The extrusion plate 5.14 and the protruding part 7 of the wheel column 5.12 are connected by a reset mechanism 8;

[0047] Among them, the reset mechanism 8 includes a receiving groove 8.1 formed on the side surface of the extrusion plate 5.14. The groove body trace line of the receiving groove 8.1 coincides with the movement trace of the protruding part 7. The receiving groove 8.1 can be slidably adapted to the protruding part 7 of the wheel column 5.12. A spiral groove 8.2 is formed on the groove bottom wall surface of the receiving groove 8.1 parallel to the horizontal plane. The extension line of the spiral trace line of the spiral groove 8.2 is an Archimedean spiral. A sliding column 8.3 connected to the protruding part 7 is slidably clamped in the spiral groove 8.2. The axis line of the sliding column 8.3 is parallel to the axis line of the wheel column 5.12;

[0048] During actual use, when the arm rod 5.2 deflects in a direction perpendicular to the groove side wall surface of the sliding card slot 4.1, at this time, the end of the protruding part 7 applies an extrusion force to the receiving groove 8.1, so that the extrusion plate 5.14 extends out of the recessed groove 5.13 and is extruded against the die bar 3. When the arm rod 5.2 deflects in a direction parallel to the groove side wall surface of the sliding card slot 4.1, at this time, the protruding part 7 pulls the extrusion plate 5.14 back to the recessed groove 5.13 along the spiral groove 8.2 through the sliding column 8.3, so that the extrusion plate 5.14 is disengaged from the die bar 3, thereby canceling the extrusion force on the die bar 3 located in the sliding card slot 4.1.

[0049] Another embodiment provided by the present invention is that the top of each mounting opening 5.11 communicates with the bottom of the inner rail groove 4.2. A through opening 8.4 is formed on the groove top wall surface of the receiving groove 8.1. A pin rod 8.5 is movably inserted in the through opening 8.4. The axis line of the pin rod 8.5 is parallel to the axis line of the wheel column 5.12. A plurality of support roller wheels 4.4 with evenly distributed gaps are movably installed at the bottom of the side extension strip 4.3. The axis line of the support roller wheels 4.4 is skew perpendicular to the length direction line of the side extension strip 4.3. An inclined surface part 8.6 for supporting the bottom end of the pin rod 8.5 is formed on the top surface of the protruding part 7. The top of the recessed groove 5.13 communicates with the bottom of the inner rail groove 4.2. The pin rod 8.5 can be inserted into the inner rail groove 4.2 and is clamped in the gap with the corresponding support roller wheel 4.4 under the support of the inclined surface part 8.6;

[0050] In actual use, when the arm 5.2 is perpendicular to the side wall of the slide slot 4.1, the bottom end of the pin 8.5 contacts the inclined surface 8.6. Under the support of the inclined surface 8.6, the pin 8.5 moves axially upward. Since the top of the recessed slot 5.13 is connected to the bottom of the inner rail slot 4.2, the top of the pin 8.5 extends into the inner rail slot 4.2, so that the top of the pin 8.5 is engaged in the gap of the support roller 4.4, thereby further limiting the lateral extension. The movement of the strip 4.3 in the length direction in the inner rail groove 4.2 indirectly limits the movement of the mold strip 3 in the length direction in the slide card groove 4.1, playing an auxiliary limit locking effect. Similarly, when the arm 5.2 moves in a direction parallel to the groove side wall surface of the slide card groove 4.1, the inclined portion 8.6 is separated from the pin rod 8.5 as the protrusion 7 moves, so that the top end of the pin rod 8.5 falls back into the through hole 8.4, thereby canceling the length direction restriction of the side extension strip 4.3 in the inner rail groove 4.2.

[0051] In another embodiment provided by the present invention, the docking boat unit 6.2 includes a slider 6.21 capable of reciprocating on the extension rail 6.1, a stopper 6.22 is fixed to one end of the top of the slider 6.21, a limiting groove 6.23 is provided on one side of the stopper 6.22, a long frame 6.24 is fixed to one end of the slider 6.21 close to the die 1, the height and width of the long frame 6.24 are the same as the height and width of the slider 6.21, and a protruding component 9 capable of exerting a force on the deflection of the arm 5.2 is installed on the side surface of the end of the long frame 6.24 away from the slider 6.21;

[0052] Among them, the protruding component 9 includes a mounting groove 9.1 opened at the top of the long frame 6.24, and a transverse tube 9.2 is hinged in the mounting groove 9.1. Specifically, convex shaft columns 9.8 rotatably mounted with the groove wall of the mounting groove 9.1 are fixed on both sides of the outside of the transverse tube 9.2. The axis of the convex shaft column 9.8 is parallel to the length direction of the long frame 6.24, and the deflection surface formed by the deflection of the transverse tube 9.2 is perpendicular to the length direction line of the slider 6.21. An inner shaft 9.3 is rotatably mounted in the transverse tube 9.2, and the axis of the inner shaft 9.3 coincides with the axis of the transverse tube 9.2. A first notch 9.4 is opened at one end of the transverse tube 9.2 located in the long frame 6.24, and the transverse tube 9.2 is provided with a plurality of grooves. A second notch 9.5 is provided at one end of the tube 9.2 located outside the long frame 6.24. The opening directions of the first notch 9.4 and the second notch 9.5 are consistent. A first rod 9.6 fixed perpendicularly to the inner shaft 9.3 is inserted into the first notch 9.4. A second rod 9.7 fixed perpendicularly to the inner shaft 9.3 is inserted into the second notch 9.5. The first rod 9.6 is parallel to the second rod 9.7. Both the first rod 9.6 and the second rod 9.7 are perpendicular to the inner shaft 9.3. The length of the first rod 9.6 is much smaller than the length of the second rod 9.7. The first rod 9.6 constitutes a supporting portion at the bottom of the long frame 6.24.

[0053] During actual use, the die bar 3 to be replaced is placed on the top of the slider 6.21, and the end of the die bar 3 to be replaced is clamped with the limit groove 6.23, so as to keep the die bar 3 to be replaced and the die bar 3 in the sliding groove 4.1 in the same plane state, and at the same time, the extension lines of the ends of the die bar 3 to be replaced and the die bar 3 in the sliding groove 4.1 are aligned, thus completing the preparation work of the die bar 3 to be replaced;

[0054] At this time, there is no die bar 3 in the long frame body 6.24, and the supporting part on the bottom of the long frame body 6.24 is not under pressure. Since the weight of the first rod body 9.6 is less than the weight of the second rod body 9.7, one end of the horizontal pipe 9.2 located outside the long frame body 6.24 is in a downward inclined state. At this time, the second rod body 9.7 deflects outward with the horizontal pipe 9.2. Then, when the long frame body 6.24 moves forward toward the positive direction of the die pressing 1 along with the slider 6.21, at this time, the arm rod 5.2 is perpendicular to the groove side wall surface of the sliding groove 4.1, that is, the pressing part 5.1 is in a locked state of clamping and limiting the die bar 3 in the sliding groove 4.1. As the long frame body 6.24 moves forward, the second rod body 9.7 and the arm rod 5.2 are pushed against each other. Under the mutual acting force between the two, the second rod body 9.7 remains unchanged under the supporting action of the wall surface of the second notch 9.5, while the arm rod 5.2 deflects in a direction horizontal to the groove side wall surface of the sliding groove 4.1. This deflection is the positive deflection of the arm rod 5.2, so that the arm rod 5.2 avoids in the collision, and at the same time, the pressing part 5.1 is switched from the locked state to the unlocked state;

[0055] After all the pressing parts 5.1 are switched to the unlocked state, at this time, as the long frame body 6.24 continues to move forward, the die bar 3 to be replaced on the top of the slider 6.21 applies an extrusion force to the end of the die bar 3 in the sliding groove 4.1, so as to extrude the die bar 3 in the sliding groove 4.1, and the stop block 6.22 provides a supporting force in the horizontal direction for the die bar 3 to be replaced during the pushing process;

[0056] After all the die bars 3 in the sliding groove 4.1 are pushed out, at this time, the die bar 3 to be replaced is located in the sliding groove 4.1, and the extruded die bar 3 falls into the long frame body 6.24, so as to contact the supporting part at the bottom of the long frame body 6.24. The extruded die bar 3 generates a pressure on the first rod body 9.6, so that the originally inclined horizontal pipe 9.2 returns to the horizontal state. At this time, the second rod body 9.7 deflects inward with the horizontal pipe 9.2, and at this time, the long frame body 6.24 moves backward along with the slider 6.21;

[0057] During the reverse movement of the long box body 6.24 along with the slider 6.21, the stop block 6.22 separates from the die bar 3, and the second rod body 9.7 is squeezed against the arm lever 5.2 in the unlocked state, so that the arm lever 5.2 returns to a state perpendicular to the groove side wall surface of the sliding groove 4.1. This deflection is the reverse deflection of the arm lever 5.2.

[0058] As the slider 6.21 continues to move in the reverse direction, when the arm lever 5.2 returns to a state perpendicular to the groove side wall surface of the sliding groove 4.1, at this time the arm lever 5.2 reaches the maximum deflection angle, that is, the pressing member 5.1 switches from the unlocked state to the locked state. As the slider 6.21 continues to move in the reverse direction, at this time the second rod body 9.7 deflects downward around the axis of the inner shaft 9.3 under the reaction force of the arm lever 5.2, and the second rod body 9.7 is in an avoidance state. During the downward deflection process of the second rod body 9.7, the second rod body 9.7 drives the first rod body 9.6 to tilt upward in the long box body 6.24 through the inner shaft 9.3. Since the extruded die bar 3 falls into the long box body 6.24, at this time the die bar 3 located in the long box body 6.24 rises due to the tilting of the first rod body 9.6.

[0059] As the slider 6.21 continues to move in the reverse direction, when the deflected second rod body 9.7 passes over the arm lever 5.2, the arm lever 5.2 no longer exerts a force on the second rod body 9.7. At this time, the die bar 3 that has been tilted upward and raised begins to fall back, so as to restore the downwardly deflected second rod body 9.7 to the initial state through the inner shaft 9.3. It should be particularly noted that the initial state is the state in which the second rod body 9.7 can be squeezed against the arm lever 5.2 in the unlocked state. As the slider 6.21 continues to move in the reverse direction, until the slider 6.21 and the long box body 6.24 completely leave the stamping area of the press die 1, thus completing the replacement of the die bar 3 on the press die 1.

[0060] In short, the feeding position structure composed of the stop block 6.22 and the limit groove 6.23 is arranged on the docking boat unit 6.2. The feeding position structure is used to place the die bar 3 to be replaced and installed. And the docking boat unit 6.2 is also provided with a return material position structure composed of the long box body 6.24. The convex component 9 is installed on the long box body 6.24. The convex component 9 can switch the pressing member 5.1 on the press die 1 from the locked state to the unlocked state during the forward movement of the docking boat unit 6.2 towards the press die 1, so as to facilitate the pushing and disassembling of the die bar 3 on the press die 1. The convex component 9 can switch the pressing member 5.1 on the press die 1 from the unlocked state to the locked state during the reverse movement of the docking boat unit 6.2 away from the press die 1, which is convenient for fastening the replaced die bar 3 on the press die 1. The whole process is simple and convenient.

[0061] In another embodiment provided by the present invention, a support assembly 10 cooperating with the protruding assembly 9 is movably mounted on one end of the long frame 6.24 close to the slider 6.21. The support assembly 10 can form a support portion supporting the mold strip 3 in the long frame 6.24 together with the protruding assembly 9 in a supporting state.

[0062] Furthermore, a blanking opening 11 is provided on the extension rail 6.1, and the blanking opening 11 is a long strip opening. When the blanking opening 11 coincides with the frame opening of the long frame body 6.24, the docking boat unit 6.2 reaches the end position of the reverse movement;

[0063] The supporting assembly 10 includes a support plate 10.1 located in the long frame 6.24, a rotating shaft rod 10.2 is fixed to the middle of the plate surface of the support plate 10.1, both ends of the rotating shaft rod 10.2 are rotatably mounted on the inner wall surface of the long frame 6.24, the axis of the rotating shaft rod 10.2 is perpendicular to the length direction line of the long frame 6.24, and the axis of the rotating shaft rod 10.2 is parallel to the horizontal plane, a top plate 10.3 is fixed to the side of the top of the support plate 10.1 facing the protruding assembly 9, and a bottom plate 10.4 is fixed to the side of the bottom of the support plate 10.1 facing away from the protruding assembly 9, and the support plate 10.1, the top plate 10.3 and the bottom plate 10.4 form a Z-shaped plate structure in the long frame 6.24, wherein the top plate 10.3 is located in the long frame 6.24, and the bottom plate 10.4 is located in the blanking port 11;

[0064] In actual use, the support plate 10.1 is in a vertical state in a natural state. Preferably, a torsion spring is provided between the rotating shaft rod 10.2 and the long frame body 6.24 to keep the support plate 10.1 in a vertical state. When the extruded mold strip 3 falls into the long frame body 6.24, one end of the extruded mold strip 3 contacts the supporting portion at the bottom of the long frame body 6.24, and the other end of the extruded mold strip 3 contacts the top of the support plate 10.1, so that the two ends of the extruded mold strip 3 are They are all supported in the long frame 6.24. When the slider 6.21 and the long frame 6.24 are completely separated from the stamping area of ​​the die 1, the bottom plate 10.4 located in the blanking port 11 is squeezed with the end of the blanking port 11, so that the support plate 10.1 is offset away from the mold strip 3. At this time, one end of the mold strip 3 loses its supporting force and slides obliquely into the blanking port 11, thereby completing the release of the extruded mold strip 3 from the long frame 6.24, which is convenient for the subsequent placement and movement of the mold strip 3.

[0065] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A mold set for bending sheet metal of a refrigerator shell, comprising a pressing mold (1) and a bottom mold (2), wherein a mold strip (3) is provided at the stamping end position of the bottom of the pressing mold (1), characterized in that: The mold strip (3) and the die (1) are connected via a sliding mechanism, and the sliding mechanism comprises: A slideway assembly (4), comprising a slide groove (4.1) provided at the bottom of the die (1), wherein the slide groove (4.1) can be slidably engaged with the die strip (3); A locking component (5) comprising a plurality of clamping members (5.1) distributed along the length direction of the slide slot (4.1), an arm (5.2) extending outward from the die (1) being fixed to the clamping member (5.1), and the clamping member (5.1) can clamp and limit the die strip (3) located in the slide slot (4.1) in a locked state; The switching assembly (6) comprises an extension rail (6.1) connected flush with the end of the bottom mold (2), and a docking boat unit (6.2) is slidably mounted on the extension rail (6.1). The forward movement of the docking boat unit (6.2) toward the die (1) can replace the mold strip (3) on the die (1), and the reverse movement of the docking boat unit (6.2) away from the die (1) can bring back the replaced mold strip (3).

2. A mold set for bending sheet metal of a refrigerator shell according to claim 1, characterized in that: The groove wall surface of the sliding groove (4.1) is provided with an inner rail groove (4.2), and side extension strips (4.3) slidingly matched with the inner rail groove (4.2) are fixed on both sides of the mold strip (3).

3. A mold set for bending sheet metal of a refrigerator shell according to claim 2, characterized in that: The clamping member (5.1) comprises a mounting opening (5.11) opened on the side of the die (1), a vertically arranged wheel column (5.12) being rotatably mounted in the mounting opening (5.11), one side of the wheel column (5.12) being spirally penetrated and fixed to an arm (5.2), an end of the arm (5.2) extending out of the wheel column (5.12) constituting a raised portion (7) of the wheel column (5.12), and when the arm (5.2) and the side of the die (1) are perpendicular, the clamping member (5.1) is in a locked state.

4. A mold set for bending sheet metal of a refrigerator shell according to claim 3, characterized in that: A recessed groove (5.13) communicating with the mounting opening (5.11) is provided on the groove wall of the sliding groove (4.1), and an extrusion plate (5.14) is fitted and installed in the recessed groove (5.13). One side of the extrusion plate (5.14) can be pushed by the raised portion (7) of the wheel column (5.12) to be extruded with the mold strip (3), and the extrusion plate (5.14) and the raised portion (7) of the wheel column (5.12) are connected via a reset mechanism (8).

5. A mold set for bending sheet metal of a refrigerator shell according to claim 4, characterized in that: The reset mechanism (8) comprises a receiving groove (8.1) provided on the side of the extrusion plate (5.14), the receiving groove (8.1) being able to slidably match with the raised portion (7) of the wheel column (5.12), a spiral groove (8.2) being provided on the groove wall surface of the receiving groove (8.1) parallel to the horizontal plane, and a sliding column (8.3) connected to the raised portion (7) being slidably engaged in the spiral groove (8.2).

6. A mold set for bending sheet metal of a refrigerator shell according to claim 5, characterized in that: The top of each mounting opening (5.11) is connected to the bottom of the inner rail groove (4.2); a through hole (8.4) is provided on the top wall of the accommodating groove (8.1); a pin rod (8.5) is movably inserted in the through hole (8.4); a plurality of support rollers (4.4) with uniform gap distribution are movably installed at the bottom of the side extension bar (4.3); a sloped portion (8.6) supporting the bottom end of the pin rod (8.5) is provided on the top surface of the protruding portion (7); and the pin rod (8.5) can extend into the inner rail groove (4.2) and engage with the corresponding support roller (4.4) gap under the support of the sloped portion (8.6).

7. A mold set for bending sheet metal of a refrigerator shell according to claim 6, characterized in that: The docking boat unit (6.2) comprises a slider (6.21) capable of reciprocating on the extension rail (6.1), a stopper (6.22) being fixed to one end of the top of the slider (6.21), a limiting groove (6.23) being provided on one side of the stopper (6.22), a long frame (6.24) being fixed to one end of the slider (6.21) close to the die (1), and a protruding component (9) capable of exerting a force on the deflection of the arm (5.2) being installed on the side surface of one end of the long frame (6.24) away from the slider (6.21).

8. The mold set for bending sheet metal of a refrigerator shell according to claim 7, characterized in that: The protruding component (9) comprises a mounting groove (9.1) provided at the top of the long frame (6.24), a transverse tube (9.2) being hinged in the mounting groove (9.1), an inner shaft (9.3) being rotatably installed in the transverse tube (9.2), a first notch (9.4) being provided at one end of the transverse tube (9.2) located inside the long frame (6.24), a second notch (9.5) being provided at one end of the transverse tube (9.2) located outside the long frame (6.24), a first rod body (9.6) being vertically fixed to the inner shaft (9.3) being inserted into the first notch (9.4), and a second rod body (9.7) being vertically fixed to the inner shaft (9.3) being inserted into the second notch (9.5).

9. A mold set for bending sheet metal of a refrigerator shell according to claim 8, characterized in that: A supporting assembly (10) that cooperates with the protruding assembly (9) is movably mounted on one end of the long frame (6.24) close to the slider (6.21); the supporting assembly (10) can form a supporting portion that supports the mold strip (3) in the long frame (6.24) together with the protruding assembly (9) in a supporting state.

10. A mold set for bending sheet metal of a refrigerator shell according to claim 9, characterized in that: The supporting assembly (10) comprises a support plate (10.1) located in the long frame (6.24); a rotating shaft rod (10.2) is fixed in the middle of the plate surface of the support plate (10.1); both ends of the rotating shaft rod (10.2) are rotatably mounted on the inner wall surface of the long frame (6.24); a top plate (10.3) is fixed on the top of the support plate (10.1) facing the protruding assembly (9); a bottom plate (10.4) is fixed on the bottom of the support plate (10.1) facing away from the protruding assembly (9); the support plate (10.1), the top plate (10.3) and the bottom plate (10.4) form a Z-shaped plate structure in the long frame (6.24).

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