Dishwasher inner tank four rounded edge flanging machine

Abstract

The present invention relates to a four-rounded flanging machine for the inner tank of a dishwasher, which is composed of a clamping mechanism, a flanging mechanism, a shaping mechanism and a one-button shape-changing mechanism. A set of flanging mechanisms are respectively arranged on the fixed support and the movable support of the one-button shape-changing mechanism. The flanging mechanism on the fixed support is used to complete the flanging of the bottom plate side of the inner tank, and the flanging mechanism on the movable support is used to complete the flanging of the top plate side; the two top corners of each set of flanging mechanisms are respectively provided with shaping mechanisms installed on the fixed support or the movable support, and the two sets of shaping mechanisms on the movable support can move with the movement of the movable support; the four sets of clamping mechanisms are independent of each other and are respectively arranged at the top corners of the flanging mechanisms. The clamping mechanism clamps the inner tank through the inner support mold and the outer pressure mold, accurately locates the clamping position of the inner tank and provides accurate tooling needs, and provides flanging guarantee for the flanging process. The servo motor drives the movable support to move to switch the flanging production of different models of inner tanks, so as to realize one machine with multiple uses and compatibility with different product specifications.

Description

Technical Field

[0001] The invention relates to a sheet metal flanging machine for machine tools, in particular to a flanging machine for the four rounded corners of an inner tank of a dishwasher. Background Art

[0002] At present, people's living standards are constantly improving, consumers are getting younger, and consumers' inherent lifestyles are gradually changing. In the near future, dishwashers will be as popular as washing machines, refrigerators and air conditioners. At present, major home appliance giants are competing to launch new dishwashers, and the functions and appearance of the products have been greatly improved compared with the past. The new dishwasher needs to meet the requirements of consumers for freeing their hands, cleaning, small size and large internal space, and saving water and electricity. Dishwashers are expected to become a potential variety in the popularization of new products, and the dishwasher market will also become the main battlefield for major manufacturers.

[0003] Dishwasher market share in Europe and the United States is 70%, while in China it is only 2.5%. Judging from the market potential, the demand for dishwashers is entering a rapid growth stage. In order to meet the different needs of the dishwasher market, it is necessary to develop diversified dishwasher products. Combined with the actual situation of small traditional Chinese kitchens, it is necessary to develop a dishwasher with small dimensions and sufficient internal space.

[0004] A key step in dishwasher production is the inner tank flanging, which is the next process after the stainless steel inner tank is bitten by the biting machine. The original flanging machine can only flanging the left side, upper side and right side of the door opening. The rounded corners are blocked by a special block, and the back is bitten by the biting machine. The radius of the rounded corners is too large, and the large radius of the rounded corners reduces the effective use space inside the dishwasher.

[0005] Currently, there are two types of dishwasher inner tanks on the market: back biting process and back flanging process. When using the back biting process, there is no need to use a flanging machine. When using the back flanging process, you need to first use a flanging machine to flanging the four rounded corners of the inner tank, and then use the flanging inner tank to weld to the bottom plate.

[0006] At present, the flange forming equipment for dishwasher inner tanks is mainly a product from the Italian Merloni Company. One is a front flanging machine, which is characterized by only flanging the three sides at the front door opening position, and not flanging the rounded corners. When in use, the bitten inner tank is squared in the flanging machine mold cavity, and the inner tank is pressed by a hydraulic cylinder. The inner tank is firmly positioned and fixed, and the flanging cylinder is used to tighten it. The flanging slider pushes the flanging mold to move, and the dishwasher inner tank is flanging. Since the inner tank is a sheet metal part, the three sides after flanging will rebound under the action of internal stress. In order to ensure that the bending angle before and after the flanging is 90°, a shaping mechanism is used to flatten and shape the flipped edges again. After the bent edges rebound again, the angle can be controlled within the error range.

[0007] The original flanging machine can only flanging three sides on the front, and is only suitable for one type of inner tank. At present, most dishwasher inner tanks are in the form of a U-shaped middle plate that bites with the upper and lower cover plates to form an open inner cavity. Because the upper and lower cover plates need to bite with the U-shaped middle plate, the R fillet radius is too large due to the limitation of the diameter of the hemming wheel. In order to increase the internal space of the inner tank, the inner tank process is changed to flanging the back and welding it to the bottom plate. After the process is improved, the radius of the four fillets of the inner tank becomes smaller for dishwashers with the same appearance size, and the internal usable space of the dishwasher is increased. On this basis, the flanging process is innovatively improved, the clamping mechanism is separated, the flanging mechanisms are independent of each other, and the shaping mechanisms are independent of each other. It can achieve only the rounded corner position, and the four straight edges are not flanging. It can also change the shape with one button to complete the flanging process of various types of inner tanks. For details, see Figure 1 (a) and (b), in which: A is the four corners that need to be flanging, B is the right angle that has been flanging, C is the front of the liner, and D is the back of the liner. Therefore, it is necessary to develop a flanging machine that can flanging the four rounded corners on the back and is suitable for liner of various sizes. Summary of the invention

[0008] The present invention is a new type of inner liner manufacturing process for an inner liner whose four rounded corners on the back need to be flanging, which is then welded to the bottom plate after flanging. At the same time, it solves the production problem of one flanging machine changing the model with one button and being compatible with the inner liner of multiple models of dishwashers, and proposes a new four-rounded corner flanging machine for dishwasher inner liner. The flanging machine is simple to install, has few wearing parts, is convenient to maintain, has a long service life, has a low investment cost, and has a high flanging efficiency.

[0009] To achieve the above-mentioned purpose, the technical solution of the present invention is: a four-corner flanging machine for the inner tank of a dishwasher, composed of a pressing mechanism, a flanging mechanism, a shaping mechanism and a one-button shape-changing mechanism, wherein a set of flanging mechanisms are respectively arranged on the fixed support and the movable support of the one-button shape-changing mechanism, the flanging mechanism on the fixed support is used to complete the flanging of the bottom plate side of the inner tank, and the flanging mechanism on the movable support is used to complete the flanging of the top plate side; the two top corners of each set of flanging mechanisms are respectively provided with shaping mechanisms installed on the fixed support or the movable support, and the two sets of shaping mechanisms on the movable support can move with the movement of the movable support; the four sets of pressing mechanisms are independent of each other and are respectively arranged at the top corners of the flanging mechanisms, the pressing mechanisms clamp the inner tank through the internal support mold and the external pressure mold, accurately locate the clamping position of the inner tank and provide accurate tooling requirements, thereby providing flanging guarantee for the flanging process.

[0010] Furthermore, the clamping mechanism is composed of a positioning cylinder with guide columns, a copper pressure block, an internal support mold, an external pressure mold, a sliding pressure plate, a support base and a hydraulic cylinder. A copper pressure block is provided at the rear end of the internal support mold, and the copper pressure block is connected to the positioning cylinder with guide columns. An external pressure mold is provided below the rear end of the internal support mold, and the external pressure mold is connected to the sliding pressure plate in the support base. The sliding pressure plate is connected to a hydraulic cylinder fixed on the support base.

[0011] Furthermore, the flanging mechanism is composed of a flanging mold, a flanging hydraulic cylinder, a thrust slide, a thrust slide guide key, a thrust slide pressure plate, a slider pressure plate, a slider and a slider guide key. The thrust slide guide key is respectively fixed on a movable bracket and a fixed bracket. The thrust slide pressure plate fixes the thrust slide between the slider pressure plate and the movable bracket and between the slider pressure plate and the fixed bracket, respectively, and the thrust slide can slide along the guide key. The thrust slide is fixedly connected to the piston rod of the flanging hydraulic cylinder. The slider guide key is fixedly connected to the inner supporting mold. The slider pressure plate fixes the slider between the slider pressure plate and the inner supporting mold and enables the slider to slide along the guide key. The flanging mold is fastened to the slider.

[0012] Furthermore, the flanging hydraulic cylinder extends out to drive the thrust slide to move in the direction of the thrust guide key, and the thrust slide drives the slider to move. The slider moves in the direction of the slider guide key, and the flanging mold flips the four rounded corners of the dishwasher inner tank by 90 degrees. The flanging hydraulic cylinder retracts after extending into position, and the thrust slide pulls the slider and the flanging mold back into position.

[0013] Furthermore, the shaping mechanism consists of a shaping mold, a cylinder fixing seat, a self-lubricating bearing, a guide column and a shaping hydraulic cylinder. The two ends of the cylinder fixing seat are slidably connected to the guide columns through self-lubricating bearings. The upper end of the guide column is fixedly connected to the shaping mold, and the middle of the bottom of the shaping mold is fixedly connected to the piston rod of the shaping hydraulic cylinder installed on the cylinder fixing seat.

[0014] Furthermore, the self-lubricating bearing is fixed in the oil cylinder fixing seat through a pressure plate, and the hydraulic oil cylinder is installed on the oil cylinder fixing seat through bolts.

[0015] Furthermore, the one-key changeover mechanism is composed of a fixed support, a servo motor, a movable support, a base, a linear guide, a screw nut, a ball screw, and a bearing seat. The fixed support is installed on the manual feeding side of the base, and the movable support is installed on the non-manual side of the base through a linear guide and a sliding shoe. The servo motor, linear guide, bearing seat and screw are installed on the flanging machine base. The middle of the movable support is connected to the screw and the nut, and the screw is connected to the servo motor. The servo motor drives the screw to rotate, thereby driving the movable support to move forward and backward. The servo motor controls the movable support to stay at different positions, which is used to meet the production needs of different types of inner liners and realize one-key changeover of different types of inner liners of the flanging machine.

[0016] The beneficial effects of the present invention are:

[0017] The four-corner flanging machine of the present invention mainly comprises a pressing mechanism, a flanging mechanism, a shaping mechanism and a one-button type changing mechanism, etc. The four-corner flanging of the inner tank of the dishwasher is completed through the steps of loading → pressing mechanism → flanging mechanism → shaping mechanism → pressing mechanism → unloading.

[0018] When another type of liner needs to be produced, and the incoming material sensor senses that there is no liner on the flanging machine, the liner of the type to be produced can be selected on the LCD touch screen. After pressing the button, the servo motor drives the screw to rotate, and the mobile bracket moves to the position of the size of the liner of that type. The four-corner flanging machine can continue the flanging cycle to produce the liner quickly and efficiently.

[0019] The servo motor drives the mobile bracket to switch the production of different types of liner flanges, so that one machine can be used for multiple purposes and be compatible with different product specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the inner liner structure where the four rounded corners on the back need to be flanging;

[0021] Among them: (a) is a small-sized liner, (b) is a large-sized liner;

[0022] Figure 2 It is a schematic diagram of the overall structure of the flanging machine of the present invention;

[0023] Figure 3 is a schematic diagram of the clamping mechanism;

[0024] Figure 4 It is a schematic diagram of the flanging mechanism;

[0025] Figure 5 It is a schematic diagram of the shaping mechanism;

[0026] Figure 6 It is a schematic diagram of a one-key type-changing mechanism. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] like Figures 2 to 6 As shown, a machine for flanging the four rounded corners of a dishwasher inner tank is composed of a pressing mechanism 1, a flanging mechanism 2, a shaping mechanism 3 and a one-key shape-changing mechanism 4. The mechanisms circulate continuously to flanging the inner tank.

[0029] A set of flanging mechanisms 2 is arranged on the fixed support of the one-button shape-changing mechanism 4, and another set of flanging mechanisms 2 is arranged on the movable support. The flanging mechanism 2 on the fixed support can complete the flanging of the bottom plate side of the inner liner, and the flanging mechanism 2 on the movable support can complete the flanging of the top plate side. The two sets of flanging mechanisms 2 are independently driven by two cylinders. When the two cylinders are extended into place respectively, the flanging of the four rounded corners of the inner liner is completed, the two cylinders are retracted, and after the induction switch senses that the cylinders are retracted into place, the shaping mechanism can be activated.

[0030] Two sets of shaping mechanisms 3 are installed on the fixed support of the one-key shaping mechanism 4, and two sets of shaping mechanisms 3 are installed on the movable support of the one-key shaping mechanism 4, and are respectively located at the top corners of the flanging mechanism 2. The two sets of shaping mechanisms 3 on the movable support can move with the movement of the movable support. The shaping cylinder extends out to flatten the rounded corners, and then the shaping cylinder retracts. After the induction switch receives the retracted signal, the shaping mechanism ends the action, the clamping cylinder retracts, and after the clamping mechanism induction switch receives the retracted signal, the actions of various mechanisms of the equipment are locked, and manual unloading can be completed.

[0031] The four sets of clamping mechanisms 1 are independent of each other and are respectively set at the top corners of the flanging mechanism 2. There is no synchronization requirement for the extension of the oil cylinder during normal clamping. The extension of the clamping oil cylinder is completed after the four sets of induction switches receive the clamping in place signal. The clamping mechanism clamps the liner through the internal support mold and the external pressure mold, accurately locates the clamping position of the liner and provides accurate tooling requirements, providing flanging guarantee for the flanging process.

[0032] A one-button type-changing mechanism 4 drives the mobile bracket to stay at different workstations through a servo motor, so as to meet the production needs of different types of liners, has a simple structure, and is convenient and fast to switch.

[0033] like Figure 3 As shown, the clamping mechanism 1 is composed of a positioning cylinder 201 with a guide column, a copper pressing block 202, an inner supporting mold 203, an outer pressing mold 204, a sliding pressing plate 205, a supporting base 206 and a hydraulic cylinder 207. A copper pressing block 202 is provided at the rear end of the inner supporting mold 203, and the copper pressing block 202 is connected to the positioning cylinder 201 with a guide column. An outer pressing mold 204 is provided below the rear end of the inner supporting mold 203, and the outer pressing mold 204 is connected to the sliding pressing plate 205 in the supporting base 206. The sliding pressing plate 205 is connected to the hydraulic cylinder 207 fixed on the supporting base 206. When the liner is placed in the inner cavity of the flanging machine, the copper pressure block fixed on the positioning cylinder with guide pins will position and press the four right-angled sides of the liner. The copper block positioning can effectively prevent the external pressing mold from pressing the right-angled sides into wrinkles during the pressing process. The hydraulic cylinder drives the sliding pressure plate to slide in the support base. The pressure of the external pressure mold will firmly fix the liner on the internal support mold. When the sensor senses that the hydraulic cylinder has moved into place, the cylinder maintains pressure, and the pressing mechanism is in a pressing state, waiting for the flanging mechanism to execute the next process.

[0034] like Figure 4As shown, the flanging mechanism is composed of a flanging die 301, a flanging hydraulic cylinder 302, a thrust slide 303, a thrust slide guide key 304, a thrust slide pressure plate 305, a slider pressure plate 306, a slider 307 and a slider guide key 308. First, the thrust slide guide key 304 is fixed to the mobile bracket and the fixed bracket respectively with screws, and then the thrust slide plate 305 is used to fix the thrust slide 303 between the slider plate 306 and the mobile bracket and between the slider plate 306 and the fixed support. After the installation is completed, it is ensured that the thrust slide 303 can slide along the thrust slide guide key 304, and the thrust slide 303 cannot fall off from the fixed support and the mobile support. The thrust slide 303 is fixedly connected to the piston rod of the flanging hydraulic cylinder 302, and then the slider guide key 308 is fixed to the inner support mold with screws, and then the slider plate 306 is used to fix the slider 307 between the slider plate 306 and the inner support mold. After the installation is completed, it is ensured that the slider 307 can slide along the slider guide key 308, and the slider 307 cannot fall off from the inner support mold and the mobile support. Finally, the flanging mold 301 is firmly fastened to the slider 307 with screws.

[0035] After receiving the signal from the clamping sensor, the flanging hydraulic cylinder extends out to drive the thrust slide to move in the direction of the thrust guide key. The thrust slide drives the flanging slider to move, and the flanging slider moves in the direction of the guide key. The flanging mold flips the four rounded corners of the dishwasher inner tank 90 degrees. The flanging cylinder extends into place, and the hydraulic cylinder retracts after the sensor senses that it is in place. The flanging thrust slide pulls the flanging slider and the flanging mold back into place. After the sensor senses that it is retracted into place, the entire machine mechanism waits for the next process.

[0036] like Figure 5 As shown, the shaping mechanism is composed of a shaping mold 401, a cylinder fixing seat 402, a self-lubricating bearing 403, a guide column 404, a pressure plate 405 and a shaping hydraulic cylinder 406. The self-lubricating bearing 403 is installed in the cylinder fixing seat 402, the self-lubricating bearing 403 is fixed in the cylinder fixing seat 402 by using the pressure plate 405, the shaping hydraulic cylinder 406 is installed on the cylinder fixing seat 402 by using bolts, the two sides of the shaping mold 401 are fixed on the guide column 404 by using bolts, and the middle part is fixed on the shaping hydraulic cylinder 406.

[0037] After receiving the signal that the previous process is completed, the hydraulic cylinder extends out and drives the shaping mold to press the four rounded corners of the inner liner that have been flipped. The pressure is maintained for 2 seconds after pressing, and then the hydraulic cylinder retracts. After the sensor senses that the shaping cylinder has retracted into place, it provides a signal to the pressing cylinder, and the pressing cylinder retracts, and the flanging of the four rounded corners of the inner liner is completed.

[0038] like Figure 6As shown, the one-key changeover mechanism is composed of a fixed support 501, a servo motor 502, a mobile support 503, a base 504, a linear guide 505, a nut 506, a screw 507, a bearing seat 508, etc. The fixed support 501 is installed on the manual feeding side of the base 504, and the linear guide 505 is installed on the non-manual side. The mobile support 503 is fixed to the sliding shoe of the linear guide 505 with bolts, and the servo motor 502, the linear guide 505, the bearing seat 508, the screw 507 and the nut 506 are installed on the base 504. Then, the middle of the mobile support 503 is connected with the screw 507 and the nut 506. The servo motor 502 drives the screw 507 to rotate, and the mobile support 503 moves forward and backward. The servo motor 502 controls the mobile support 503 to stay at different positions, which can meet the production needs of different types of liners and realize the one-key changeover of different types of liners of the flanging machine.

Claims

1. A machine for flanging the four rounded corners of a dishwasher liner, which is composed of a pressing mechanism, a flanging mechanism, a shaping mechanism and a one-button shape-changing mechanism, and is characterized by: A set of flanging mechanisms are respectively arranged on the fixed support and the movable support of the one-key changing mechanism. The flanging mechanism on the fixed support is used to complete the flanging on the bottom plate side of the inner liner, and the flanging mechanism on the movable support is used to complete the flanging on the top plate side; each set of flanging mechanisms is respectively provided with a shaping mechanism installed on the fixed support or the movable support at the two top corners, and the two sets of shaping mechanisms on the movable support can move with the movement of the movable support; the four sets of clamping mechanisms are independent of each other and are respectively arranged at the top corners of the flanging mechanisms. The clamping mechanism clamps the inner liner through the internal support mold and the external pressure mold, accurately locates the clamping position of the inner liner and provides accurate tooling requirements, and provides flanging guarantee for the flanging process; the shaping mechanism is composed of a shaping mold, a cylinder fixed seat, a self-lubricating bearing, a guide column and a shaping hydraulic cylinder, and the two ends of the cylinder fixed seat are respectively connected by self-lubricating bearings for sliding A guide column, wherein the upper end of the guide column is fixedly connected to the shaping mold, and the middle of the lower side of the shaping mold is fixedly connected to the piston rod of the shaping hydraulic cylinder installed on the cylinder fixing seat; the one-key mold changing mechanism is composed of a fixed support, a servo motor, a movable support, a base, a linear guide rail, a screw nut, a ball screw, and a bearing seat. The fixed support is installed on the manual feeding side of the base, and the movable support is installed on the non-manual side of the base through a linear guide rail and a sliding shoe. The servo motor, linear guide rail, bearing seat and screw are installed on the flanging machine base, and the middle of the movable support is connected to the screw and nut, and the screw is connected to the servo motor. The servo motor drives the screw to rotate, thereby driving the movable support to move forward and backward. The servo motor controls the movable support to stay at different positions, which is used to meet the production needs of different types of inner liners and realize one-key mold changing of different types of inner liners of the flanging machine.

2. The dishwasher inner tank four-corner flanging machine according to claim 1, characterized in that: The clamping mechanism consists of a positioning cylinder with guide columns, a copper pressure block, an internal support mold, an external pressure mold, a sliding pressure plate, a support base and a hydraulic cylinder. A copper pressure block is provided at the rear end of the internal support mold, and the copper pressure block is connected to the positioning cylinder with guide columns. An external pressure mold is provided below the rear end of the internal support mold, and the external pressure mold is connected to the sliding pressure plate in the support base. The sliding pressure plate is connected to a hydraulic cylinder fixed on the support base.

3. The dishwasher inner tank four-corner flanging machine according to claim 1, characterized in that: The flanging mechanism is composed of a flanging mold, a flanging hydraulic cylinder, a thrust slide, a thrust slide guide key, a thrust slide pressure plate, a slider pressure plate, a slider and a slider guide key. The thrust slide guide key is respectively fixed on a movable bracket and a fixed bracket. The thrust slide pressure plate fixes the thrust slide between the slider pressure plate and the movable bracket and between the slider pressure plate and the fixed bracket, respectively, and the thrust slide can slide along the guide key. The thrust slide is fixedly connected to the piston rod of the flanging hydraulic cylinder. The slider guide key is fixedly connected to the inner supporting mold. The slider pressure plate fixes the slider between the slider pressure plate and the inner supporting mold and enables the slider to slide along the guide key. The flanging mold is fastened to the slider.

4. The dishwasher inner tank four-corner flanging machine according to claim 3, characterized in that: The flanging hydraulic cylinder extends out to drive the thrust slide to move in the direction of the thrust guide key, and the thrust slide drives the slider to move. The slider moves in the direction of the slider guide key, and the flanging mold flips the four rounded corners of the dishwasher inner tank by 90 degrees. The flanging hydraulic cylinder retracts after extending into position, and the thrust slide pulls the slider and the flanging mold back into position.

5. The dishwasher inner tank four-corner flanging machine according to claim 1, characterized in that: The self-lubricating bearing is fixed in the oil cylinder fixing seat through a pressure plate, and the hydraulic oil cylinder is installed on the oil cylinder fixing seat through bolts.

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