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

Technical Field

[0001] The invention relates to the technical field of mold equipment, in particular to a mold group for bending sheet metal of a refrigerator shell. Background Art

[0002] Bending the sheet metal of the refrigerator shell is an important process in the refrigerator production process. It involves the forming and fixing of sheet metal parts. In the bending process, the bending radius is also one of the important bending parameters, also known as the bending R angle. Since the radius parameters of the bending R angle of different parts of the refrigerator shell are different, the R angle mold strips of the molds used are also different;

[0003] Existing bending molds such as China Patent Publication No.: CN211679592U, the name of the patent is "A detachable arc bending mold", the patent includes "an upper mold and a lower mold, the upper mold includes a base assembly and an R die head, the base assembly is detachably connected to the R die head; the lower mold is provided with a lower mold groove matching one end of the R die head;

[0004] Although the existing bending die set can realize the disassembly and assembly of the R-angle mold strip, its shortcoming is that its fixing method is locked by bolts. In the actual process of replacing the R-angle mold strip each time, each bolt needs to be removed and installed and fixed in turn. The whole process is time-consuming, which prolongs the interval time of the entire refrigerator shell sheet metal bending, thereby affecting the bending processing efficiency. Therefore, in order to solve the above problems, we propose a mold set for refrigerator shell sheet metal bending. Summary of the invention

[0005] The purpose of the present invention is to provide a mold set for bending sheet metal of a refrigerator shell to solve the deficiencies in the above-mentioned prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A mold set for bending sheet metal of a refrigerator shell, comprising a pressing mold and a bottom mold, wherein a mold strip is provided at the stamping end of the bottom of the pressing mold, and the mold strip and the pressing mold are connected by a sliding card mechanism, wherein the sliding card mechanism comprises:

[0008] A slideway assembly, comprising a slide slot provided at the bottom of the die, wherein the slide slot can be slidably engaged with the die strip;

[0009] The locking and limiting assembly includes a plurality of clamping members distributed along the length direction of the slide card slot, and an arm extending outward from the die is fixed to the clamping member, and the clamping member can clamp and limit the die strip located in the slide card slot in a locked state;

[0010] The switching assembly includes an extension rail flush with the end of the bottom mold, on which a docking boat unit is slidably mounted. The forward movement of the docking boat unit toward the die can replace the mold strip on the die, and the reverse movement of the docking boat unit away from the die can bring back the replaced mold strip.

[0011] Preferably, the groove wall surfaces of the sliding grooves are provided with inner rail grooves, and side extension strips slidably matched with the inner rail grooves are fixed on both sides of the mold strips.

[0012] Preferably, the clamping piece includes an installation opening opened on the side of the die, and a vertically arranged wheel column is rotatably installed in the installation opening. One side of the wheel column is spirally penetrated and fixed with an arm rod, and one end of the arm rod extending out of the wheel column constitutes a raised portion of the wheel column. When the arm rod is perpendicular to the side of the die, the clamping piece is in a locked state.

[0013] Preferably, a recessed groove connected to the mounting port is provided on the groove wall surface of the sliding groove, and an extrusion plate is adapted to be installed in the recessed groove. One side of the extrusion plate can be pushed by the raised portion of the wheel column and extruded with the mold strip, and the extrusion plate and the raised portion of the wheel column are connected by a reset mechanism.

[0014] Preferably, the reset mechanism includes a receiving groove opened on the side of the extrusion plate, and the receiving groove can be slidably adapted with the raised portion of the wheel column. A spiral groove is opened on the bottom wall of the receiving groove parallel to the horizontal plane, and a sliding column connected to the raised portion is slidably clamped in the spiral groove.

[0015] Preferably, the top of each of the mounting openings is communicated with the bottom of the inner rail groove, a through opening is provided on the top wall surface of the accommodating groove, a pin rod is movably inserted in the through opening, a plurality of support rollers with evenly spaced gaps are movably installed on the bottom of the side extension strip, and an inclined portion for supporting the bottom end of the pin rod is provided on the top surface of the raised portion, and the pin rod can extend into the inner rail groove and engage with the corresponding support roller gap under the support of the inclined portion.

[0016] Preferably, the docking boat unit includes a slider capable of reciprocating on an extension rail, a stop block is fixed to one end of the top of the slider, a limiting groove is provided on one side of the stop block, a long frame is fixed to one end of the slider close to the die, and a protruding component capable of applying force to the deflection of the arm is installed on the side surface of the end of the long frame away from the slider.

[0017] 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.

[0018] 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.

[0019] Preferably, a material drop opening is provided on the extension rail, and when the material drop opening coincides with the frame opening of the long frame body, the docking boat unit reaches the terminal position of the reverse movement.

[0020] 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

[0021] 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.

[0022] Figure 1 It is an overall schematic diagram of a mold set for bending sheet metal of a refrigerator shell of the present invention;

[0023] Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle;

[0024] 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;

[0025] Figure 4 This 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;

[0026] Figure 5It 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;

[0027] Figure 6 For the present invention Figure 5 Enlarged view of point B in the middle;

[0028] 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:

[0029] 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;

[0030] Fig. 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.

[0031] Description of reference numerals:

[0032] 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

[0033] 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.

[0034] See also Figure 1-9 The embodiment of the present invention provides a mold set for bending a refrigerator shell sheet metal, comprising a die 1 and a bottom die 2, a mold strip 3 is provided at the stamping end of the bottom of the die 1, and the mold strip 3 is connected to the die 1 through a sliding mechanism, and the sliding mechanism comprises:

[0035] The slideway assembly 4 includes a slide slot 4.1 formed at the bottom of the die 1, and the slide slot 4.1 can be slidably engaged with the die strip 3;

[0036] The locking assembly 5 comprises a plurality of clamping members 5.1 distributed along the length direction of the slide slot 4.1, and an arm 5.2 extending outward from the die 1 is fixed to the clamping member 5.1. The clamping member 5.1 can clamp and limit the die strip 3 in the slide slot 4.1 in the locked state;

[0037] The switching assembly 6 comprises an extension rail 6.1 connected flush with the end of the bottom mold 2, on which a docking boat unit 6.2 is slidably mounted, and the docking boat unit 6.2 moves forward toward the die 1 to replace the mold strip 3 on the die 1, and moves backward away from the die 1 to bring back the replaced mold strip 3;

[0038] Specifically, the motion trajectory of the die 1 is a vertical reciprocating motion up and down, the bottom die 2 is a long strip-shaped die located directly below the die 1, the die strip 3 is located at the stamping end at the bottom of the bottom die 2, the die strip 3 is a strip structure whose length is adapted to the length of the bottom end of the die 1, different die strips 3 have different R angles, and the bending angles of the refrigerator shell after bending are also different. The length direction line of the die strip 3 during use is parallel to the horizontal plane, and the clamping member 5.1 has a locking state and an unlocking state. When the clamping member 5.1 is in the unlocking state, the die strip 3 can move along the slot length direction of the slide slot 4.1, and the clamping member 5.1 is in the locking state to clamp and limit the die strip 3 located in the slide slot 4.1, and the end of the extension rail 6.1 is flush with the end of the bottom die 2, and a driving unit 6.3 for controlling the reciprocating movement of the docking 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 straight rod motor;

[0039] In actual use, the mold strip 3 moves with the die 1 to stamp and bend the refrigerator shell on the bottom die 2. When the mold strip 3 on the die 1 needs to be replaced, the die 1 is in a raised state separated from the bottom die 2. At this time, the mold strip 3 to be replaced is placed on the docking boat unit 6.2. At this time, the mold strip 3 to be replaced moves forward with the docking boat unit 6.2.

[0040] During the forward movement on the barge unit 6.2, the barge unit 6.2 switches the pressing member 5.1 from the locked state to the unlocked state, and the mold strip 3 to be replaced applies a pushing force to the end of the mold strip 3 on the die 1, thereby squeezing the mold strip 3 on the die 1 out of the slide slot 4.1. At this time, the mold strip 3 to be replaced is located in the slide slot 4.1, and the mold strip 3 squeezed out of the slide slot 4.1 falls on the barge unit 6.2, and is brought back as the barge unit 6.2 moves in the reverse direction.

[0041] During the reverse movement on the barge unit 6.2, the barge unit 6.2 switches the clamping member 5.1 from the unlocked state to the locked state, so that the mold strip 3 just installed in the slide slot 4.1 can be limited and fixed, thereby completing the replacement of the mold strip 3 on the die 1. The whole process is simple to operate, saves time, effectively shortens the interval time of the entire refrigerator shell sheet metal bending, helps to improve the bending processing efficiency, and also improves the degree of automation.

[0042] In another embodiment provided by the present invention, the groove wall surface of the slide groove 4.1 is provided with an inner rail groove 4.2, and the inner rail groove 4.2 and the slide groove 4.1 form a T-shaped structure on the cross section of the die 1, and side extension bars 4.3 that are slidably matched with the inner rail groove 4.2 are fixed on both sides of the mold strip 3. In actual use, the mold strip 3 is aligned with the slide groove 4.1, and the inner rail groove 4.2 is aligned with the side extension bars 4.3, and then the mold strip 3 is horizontally moved and inserted into the slide groove 4.1, so that the mold strip 3 can be hung on the inner rail groove 4.2 through the side extension bars 4.3.

[0043] In another embodiment provided by the present invention, the pressing member 5.1 includes a mounting opening 5.11 opened on the side of the die 1, the mounting opening 5.11 is vertically connected to the slide slot 4.1, a vertically arranged wheel column 5.12 is rotatably mounted in the mounting opening 5.11, the wheel column 5.12 can rotate axially, one side of the wheel column 5.12 is spirally penetrated and fixed with the arm 5.2, the axis of the arm 5.2 is perpendicular to the axis of the wheel column 5.12, and one end of the arm 5.2 extending out of the wheel column 5.12 forms a protrusion 7 of the wheel column 5.12;

[0044] In actual use, the arm 5.2 can deflect with the wheel column 5.12 as the center. When the arm 5.2 is perpendicular to the side wall of the slide groove 4.1, the protrusion 7 is at the position closest to the slide groove 4.1. When the arm 5.2 is perpendicular to the side of the die 1, the clamping member 5.1 is in a locked state. At this time, the mold strip 3 is subjected to the extrusion force applied by the protrusion 7 in the slide groove 4.1, so that the mold strip 3 is clamped and locked in the slide groove 4.1.

[0045] In another embodiment provided by the present invention, a recessed groove 5.13 communicating with the mounting opening 5.11 is provided on the groove wall surface of the slide card groove 4.1, and an extrusion plate 5.14 is adapted to be installed in the recessed groove 5.13, and the plate surface of the extrusion plate 5.14 is flush with the groove wall surface of the slide card groove 4.1, and one side of the extrusion plate 5.14 can be pushed by the raised portion 7 of the wheel column 5.12 and extruded with the mold strip 3, thereby increasing the contact area of ​​the mold strip 3 when being extruded, and the extrusion plate 5.14 is connected to the raised portion 7 of the wheel column 5.12 through a reset mechanism 8;

[0046] The reset mechanism 8 includes a receiving groove 8.1 provided on the side of the extrusion plate 5.14, the groove body trajectory of the receiving groove 8.1 coincides with the motion trajectory of the protrusion 7, the receiving groove 8.1 can be slidably matched with the protrusion 7 of the wheel column 5.12, a spiral groove 8.2 is provided on the groove bottom wall surface of the receiving groove 8.1 parallel to the horizontal plane, the spiral trajectory line of the spiral groove 8.2 is extended to the Archimedean spiral line, a sliding column 8.3 connected to the protrusion 7 is slidably clamped in the spiral groove 8.2, and the axis of the sliding column 8.3 is parallel to the axis of the wheel column 5.12;

[0047] In actual use, when the arm 5.2 is deflected in a direction perpendicular to the side wall of the slide slot 4.1, the end of the protrusion 7 applies an extrusion force to the accommodating slot 8.1, so that the extrusion plate 5.14 extends out of the recessed slot 5.13 and is extruded with the mold strip 3. When the arm 5.2 is deflected in a direction parallel to the side wall of the slide slot 4.1, the protrusion 7 pulls the extrusion plate 5.14 back to the recessed slot 5.13 along the spiral slot 8.2 through the slide column 8.3, so that the extrusion plate 5.14 is separated from the mold strip 3, thereby canceling the extrusion force of the mold strip 3 in the slide slot 4.1.

[0048] In another embodiment provided by the present invention, the top of each mounting opening 5.11 is connected to the bottom of the inner rail groove 4.2, a through opening 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 opening 8.4, the axis of the pin rod 8.5 is parallel to the axis of the wheel column 5.12, a plurality of support rollers 4.4 with uniform gap distribution are movably installed at the bottom of the side extension bar 4.3, the axis of the support rollers 4.4 is skewed and perpendicular to the length direction line of the side extension bar 4.3, the top surface of the raised portion 7 is provided with an inclined portion 8.6 for supporting the bottom end of the pin rod 8.5, the top of the recessed groove 5.13 is connected to the bottom of the inner rail groove 4.2, and the pin rod 8.5 can be extended into the inner rail groove 4.2 and snapped into the corresponding gap of the support roller 4.4 under the support of the inclined portion 8.6;

[0049] 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.

[0050] 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;

[0051] 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.

[0052] In actual use, the mold strip 3 to be replaced is placed on the top of the slider 6.21, and the end of the mold strip 3 to be replaced is engaged with the limit groove 6.23, so that the mold strip 3 to be replaced and the mold strip 3 in the slide slot 4.1 are kept in the same plane state, and at the same time, the mold strip 3 to be replaced is aligned with the end extension line of the mold strip 3 in the slide slot 4.1, thereby completing the preparation work of replacing the mold strip 3;

[0053] At this time, there is no mold strip 3 in the long frame 6.24, and the supporting part on the bottom of the long frame 6.24 is not subjected to pressure. Since the weight of the first rod 9.6 is less than that of the second rod 9.7, the end of the cross tube 9.2 located outside the long frame 6.24 is in a downward tilted state. At this time, the second rod 9.7 tilts outward with the cross tube 9.2. Then, when the long frame 6.24 moves toward the die 1 along with the slider 6.21, the arm 5.2 is in a vertical state with the side wall of the slide slot 4.1, that is, the pressing member 5.1 is in the state of being opposite to the slide slot 4.1. 1 realizes the locking state of clamping limit, the second rod body 9.7 moves with the positive direction of the long frame body 6.24, so that the second rod body 9.7 and the arm 5.2 are squeezed and pushed, and under the interaction force between the two, the second rod body 9.7 remains unchanged under the support of the wall of the second notch 9.5, and the arm 5.2 deflects in the direction that is horizontal to the groove side wall of the sliding groove 4.1, and the deflection is the positive deflection of the arm 5.2, so that the arm 5.2 avoids in the collision, and at the same time, the pressing member 5.1 is switched from the locked state to the unlocked state;

[0054] When all the pressing members 5.1 are switched to the unlocked state, as the long frame 6.24 continues to move forward, the mold strip 3 to be replaced at the top of the slider 6.21 applies a squeezing force to the end of the mold strip 3 in the slide slot 4.1, thereby squeezing the mold strip 3 in the slide slot 4.1, and the stopper 6.22 provides a horizontal support force for the mold strip 3 to be replaced during the squeezing process;

[0055] When all the mold strips 3 in the slide slot 4.1 are pushed out, the mold strips 3 to be replaced are located in the slide slot 4.1, and the extruded mold strips 3 fall into the long frame 6.24, thereby contacting the supporting portion at the bottom of the long frame 6.24. The extruded mold strips 3 exert pressure on the first rod 9.6, so that the originally inclined transverse tube 9.2 is restored to a horizontal state. At this time, the second rod 9.7 tilts and deflects inward along with the transverse tube 9.2, and the long frame 6.24 moves in the opposite direction along with the slider 6.21.

[0056] When the long frame 6.24 moves in the reverse direction with the slider 6.21, the stopper 6.22 separates from the mold strip 3, and the second rod 9.7 pushes against the arm 5.2 in the unlocked state, so that the arm 5.2 is restored to a state perpendicular to the side wall of the slide slot 4.1. This deflection is the reverse deflection of the arm 5.2.

[0057] As the slider 6.21 continues to move in the reverse direction, when the arm 5.2 is restored to a state perpendicular to the side wall of the slide slot 4.1, the arm 5.2 reaches the maximum deflection angle, that is, the clamping member 5.1 switches from the unlocked state to the locked state. As the slider 6.21 continues to move in the reverse direction, the second rod 9.7 is deflected by the downward pressure around the axis of the inner shaft 9.3 under the reaction force of the arm 5.2, and the second rod 9.7 is in an avoidance state. During the downward pressure and deflection of the second rod 9.7, the second rod 9.7 drives the first rod 9.6 to rise and tilt in the long frame 6.24 through the inner shaft 9.3, and the extruded mold strip 3 falls into the long frame 6.24. At this time, the mold strip 3 located in the long frame 6.24 is lifted by the first rod 9.6.

[0058] As the slider 6.21 continues to move in the reverse direction, when the deflected second rod 9.7 passes over the arm 5.2, the arm 5.2 no longer applies force to the second rod 9.7, and the raised mold strip 3 begins to fall back, thereby restoring the deflected second rod 9.7 to its initial state through the inner shaft 9.3. It should be noted that the initial state is a state in which the second rod 9.7 can be squeezed and pushed by the arm 5.2 in the unlocked state, and as the slider 6.21 continues to move in the reverse direction, until the slider 6.21 and the long frame 6.24 are completely separated from the stamping area of ​​the die 1, the die strip 3 on the die 1 is replaced;

[0059] In short, a loading position structure composed of a block 6.22 and a limit groove 6.23 is provided on the docking boat unit 6.2, and the loading position structure is used to place the mold strip 3 to be replaced and installed, and a return position structure composed of a long frame 6.24 is also provided on the docking boat unit 6.2, wherein the long frame 6.24 is also installed with a protruding component 9, and the protruding component 9 can switch the clamping piece 5.1 on the die 1 from a locked state to an unlocked state during the forward movement of the docking boat unit 6.2 toward the die 1, so as to facilitate the pushing and disassembly of the mold strip 3 on the die 1, and the protruding component 9 can switch the clamping piece 5.1 on the die 1 from an unlocked state to a locked state during the reverse movement of the docking boat unit 6.2 away from the die 1, so as to facilitate the tightening of the replaced mold strip 3 on the die 1, and the whole process is simple and convenient.

[0060] 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.

[0061] 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;

[0062] 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;

[0063] 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.

[0064] 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) formed 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 extension rail (6.1) is provided with a blanking opening (11), and when the blanking opening (11) coincides with the frame opening of the long frame (6.24), the docking boat unit (6.2) reaches the terminal position of the reverse movement.

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