Automatic welding device and welding process for composite bottom of cookware

Abstract

The present invention discloses an automatic welding device and welding process for a composite bottom of a cookware, comprising a pressing plate device and a supporting seat; a rotating assembly is provided on one side of the supporting seat, and a rivet assembly is provided on the other side; the rivet assembly comprises an upper template, a lower template and a rivet seat, the upper template is provided on the pressing plate device, and the lower template is movably provided on the rivet seat; a gear is provided on one side of the lower template, and a rack matching the gear is slidably provided on the rivet seat; the rotating assembly comprises a rotating frame and a frame body, the rotating frame is symmetrically provided with positioning rings, the rotating frame is provided with a strong magnetic block, the frame body is provided with a driving block, and the driving block is connected to the rack through a pull rope; the present invention provides a brazing device for a composite bottom of a cookware, by arranging the rivet assembly and the rotating assembly on the brazing device, the speed of the pot body circulation is improved, the welding efficiency is greatly improved, and the automation degree of the cookware welding is improved.

Description

Technical Field

[0001] The invention relates to the technical field of cookware production equipment, in particular to an automatic welding device and a welding process for a composite bottom of a cookware. Background Art

[0002] Composite bottom cookware is a kind of cookware commonly used in modern kitchens. Different composite bottoms are usually set to cooperate with induction cookers, improve wear resistance or improve heating uniformity. For example, in order to improve the wear resistance and heating uniformity of the cookware, the composite cookware is usually made of a stainless steel bottom with a middle copper layer or aluminum layer welded to the pot body. That is, the cookware adopts a pot body-copper plate-stainless steel bottom plate structure. The three-layer composite structure is brazed in a "sandwich" manner, and the layers are brazed into one by a brazing machine.

[0003] For example, Chinese patent number CN101559508B discloses a brazing machine for electric heating composite pot bottoms, which discloses the conventional structure of the brazing machine. In the process of brazing pots with the brazing machine, the following problems exist:

[0004] When brazing the cookware, the rough pot body needs to be placed on a support seat first, and then the brazing material and the copper plate and stainless steel base plate to be brazed are placed on the rough pot body and then heated and brazed. This process is relatively time-consuming. At the same time, the operating speed of the rough pot and the processed pot is low, which makes it difficult to improve the production efficiency of the cookware. Summary of the invention

[0005] The invention aims at the deficiencies in the prior art and provides an automatic welding device and a welding process for a composite bottom of a cookware.

[0006] In order to solve the above technical problems, the present invention solves them through the following technical solutions: an automatic welding device for a composite bottom of a cookware, comprising a pressing plate device and a supporting seat.

[0007] In the above scheme, preferably, a rotating assembly for rotating the pot body and cooperating with the supporting seat is provided on one side of the supporting seat, and a riveting assembly for merging the copper plate and the brazing material plate is provided on the other side;

[0008] The riveting assembly comprises an upper template, a lower template and a riveting seat, wherein the upper template is arranged on the pressing plate device, and the lower template is movably arranged on the riveting seat;

[0009] A gear is provided on one side of the lower template, and a rack matching the gear is slidably provided on the riveting seat;

[0010] The rotating assembly includes a rotating frame and a frame body, the rotating frame is symmetrically provided with a positioning ring for placing the pot body, the rotating frame is provided with a strong magnetic block corresponding to the position of the positioning ring, the frame body is provided with a driving block that cooperates with the strong magnetic block, and the driving block is connected to the rack through a pull rope.

[0011] In the above scheme, preferably, a guide rod is fixedly provided on the rack, a guide seat matching with the guide rod is provided on the riveting seat, and a rope plate connected with the rope is fixedly provided after the guide rod passes through the guide seat.

[0012] In the above scheme, preferably, a flip arm is provided on one side of the lower template, one end of the flip arm is fixed to the lower template, and the other end is provided with a rotating shaft, and the gear is fixed on the rotating shaft.

[0013] In the above scheme, preferably, both the upper template and the lower template are provided with ejector pins for riveting the brazing plate and the copper plate.

[0014] In the above scheme, preferably, the support seat includes a lifting unit and a lifting platform, and the rotating frame is provided with a lifting hole that matches the lifting platform.

[0015] In the above scheme, preferably, a capsule is arranged between the rack and the guide seat, an adsorption hole connected to the capsule is arranged on the lower template, and the capsule is connected to the adsorption hole through a solenoid valve.

[0016] In the above solution, preferably, a proximity switch is provided on the lower template, and the proximity switch is electrically connected to the solenoid valve.

[0017] In the above solution, preferably, the solder plate is made of silver-based solder.

[0018] In the above scheme, preferably, a welding process of an automatic welding device for a composite bottom of a cookware is as follows:

[0019] S1: Place the pot body on the positioning ring away from the support seat, and put the brazing plate, copper plate, and brazing plate on the lower template in sequence, start the pressing device to press down, and then the upper template slides down and rivets the brazing plate on the upper and lower surfaces of the copper plate through the ejector pin;

[0020] S2: Start the rotating assembly and the lifting unit at the same time, lower the support seat to the bottom of the rotating frame, and the rotating assembly drives the rotating frame to rotate 180°, and rotates the positioning ring station for placing the pot body to the top of the support seat;

[0021] S3: While the rotating frame is rotating, the strong magnetic block absorbs the driving block so that the driving block pulls the guide rod to slide, and further drives the rack to drive the gear to flip, so that the lower template flips 180°. When the rotating frame rotates 180°, the assembly of the copper plate and the brazing plate in the lower template is flipped and placed above the pot body. At the same time, the strong magnetic block and the driving block are just disconnected, and the lower template is reset by rotating through the reset torsion spring or reset spring, and the driving block is also reset;

[0022] S4: Then, the stainless steel bottom plate is placed on the assembly of the copper plate and the brazing material plate, and the brazing material plate, copper plate, and brazing material plate for the next riveting are placed on the lower template in sequence, and the pressing plate device is started to press down. At the same time, the lifting platform on the support seat rises and abuts against the bottom surface of the pot body, and the heating component is started to heat and melt the brazing material plate to braze the pot body, the copper plate, and the stainless steel bottom plate into one body;

[0023] S5: In step S3, during the flipping process of the lower template driven by the rack, the rack slides and is stretched by the capsule to make the adsorption hole adsorb the copper plate. Then the lower template is flipped 180° and placed above the support seat. The proximity switch senses the pot body and triggers the solenoid valve to deflate, thereby making the adsorption hole detach from the adsorption of the copper plate, and the copper plate falls onto the pot body.

[0024] The beneficial effects of the present invention are as follows: the present invention provides a brazing device for a composite bottom of a cookware, and by arranging a riveting assembly and a rotating assembly on the brazing device, the speed of the circulation of the cookware body is improved, and at the same time, when the cookware body is circulated, the copper plate material to be brazed is automatically placed on the cookware body to be welded, which greatly improves the welding efficiency and the degree of automation of the cookware welding; and the riveting device saves the time spent on placing each layer of plate parts, saves labor, and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the main structure of the present invention.

[0026] Figure 2 It is a schematic diagram of the cross-sectional structure of the lower template of the riveting assembly of the present invention.

[0027] Figure 3 It is a schematic diagram of the structure of the pressure riveting assembly of the present invention.

[0028] Figure 4 It is a schematic diagram of the partially enlarged structure of location A of the present invention.

[0029] Figure 5 It is a schematic diagram of the three-dimensional structure of the upper template and the lower template of the present invention.

[0030] Figure 6 It is a schematic diagram of the three-dimensional structure of the ejector pin of the present invention.

[0031] Figure 7It is a schematic diagram of the three-dimensional structure of the driving rod and the wedge block of the present invention. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0033] Example 1: See Figure 1-Figure 7 .

[0034] The invention discloses an automatic welding device for a composite bottom of a cookware, comprising a pressing plate device 1 and a supporting seat 2. The supporting seat 2 is a brazing seat on which a cookware body 101 is placed and a heating component is built in. The pressing plate device 1 is vertically lifted and lowered. When in use, the cookware body 101 is placed on the supporting seat 2, and then a copper plate 102 and a stainless steel bottom plate are placed on the cookware body 101. When placing, a brazing material plate 103 is placed between the copper plate 102 and the cookware body 101 and between the copper plate 102 and the stainless steel bottom plate. Then the pressing plate device 1 slides down vertically to press the bottom plate, and the supporting seat 2 is heated to press the cookware body 101, the copper plate 102 and the stainless steel bottom plate into one body to form a composite cookware bottom. This is the brazing process of the cookware brazing machine.

[0035] The stainless steel bottom plate is made of 430 stainless steel, which has magnetic properties and non-stop wear resistance, thereby improving the wear resistance of the composite pot bottom; the brazing material plate 103 is a circular thin sheet, and its thickness is preferably 0.1-1mm, and the specific parameters are determined according to the diameter of the composite pot bottom and the thickness of the copper plate 102 and the stainless steel bottom plate; the brazing material plate 103 is made of silver-based brazing material or copper-based brazing material;

[0036] In this embodiment, silver-based solder is taken as an example. Specifically, the metal element raw materials Ag, Cu, and Ga are mixed with the following components according to mass percentage: Ag 52%, Ga 5%, and Cu 43%; then the weighed Ag, Cu, and Ga raw materials are loaded into a graphite crucible, and smelted by vacuum induction melting under argon protection until the raw materials are completely melted. After the smelting is completed, the cooled solder ingot is obtained by cooling with the furnace. The solder ingot is placed on a sheet rolling machine for rolling cold deformation treatment, and the final rolling deformation is 60%-90%. The rolled solder is placed in a vacuum furnace for annealing treatment, and the annealed solder is cooled and cold rolled to a sheet solder with a thickness of 0.1 to 0.5 mm using a sheet rolling machine, so as to obtain a finished silver-based solder. A thicker sheet solder can be rolled according to actual conditions, and then the sheet solder is placed on a punch press to punch out a circular sheet for use in the present invention;

[0037] The composition ratio of Ag, Cu and Ga can be appropriately adjusted according to the material changes of the copper plate 102, the pot body 101 or the stainless steel bottom plate.

[0038] In order to increase the rotation speed of the pot body 101, a rotating assembly 3 for rotating the pot body 101 is provided on one side of the support seat 2. The rotating assembly 3 includes a rotating motor 301 and a rotating frame 302. The rotating frame 302 is fixed to the end of the rotating shaft of the rotating motor 301. A plurality of positioning rings 303 for placing the pot body 101 are evenly arranged on the rotating frame 302 around the circumference of the motor shaft. The pot body 101 is placed upside down on the positioning rings 303 when it is rotating. In this embodiment, two sets of positioning rings 303 are set as an example, that is, Figure 1 In the state shown, the two sets of positioning rings 303 are arranged at 180° around the circumference of the motor shaft.

[0039] In order to prevent the rotating frame 302 from interfering with the support base 2 during rotation, the support base 2 includes a lifting unit 201 for lifting and a lifting platform 202 arranged on the lifting unit 201. The lifting unit 201 is preferably an electric push rod. The lifting unit 201 can realize the lifting and lowering of the lifting platform 202. When the rotating frame 302 rotates, the lifting unit 201 lowers the lifting platform 202 so that the rotating frame 302 can pass through the lifting platform 202; a lifting hole 304 for the lifting platform 202 to pass through is correspondingly provided at the positioning ring 303 of the rotating frame 302. When the rotating frame 302 stops rotating, the lifting platform 202 can be lifted upward, and after passing through the lifting hole 304, it cooperates with the inverted pot body 101 on the positioning ring 303, so that the inner bottom surface of the pot body 101 contacts the top surface of the lifting platform 202, thereby facilitating the pressing of the pressing plate device 1.

[0040] In order to fix the copper plate 102, the pot body 101 and the brazing plate 103 between the stainless steel bottom plate and the copper plate 102 into one body, so as to facilitate the placement of the copper plate 102 on the pot body 101, in this embodiment, a rivet assembly 4 for fixing the brazing plate 103 on both sides of the copper plate 102 is provided on the other side of the support seat 2, the rivet assembly 4 comprises an upper template 401 and a lower template 402, the pressing plate device 1 comprises a lower pressing plate 104 and a pressing unit connected thereto, the pressing unit is preferably a cylinder or an electric push rod, the lower pressing plate 104 is fixedly provided with a pressing plate device 1 on one side corresponding to the support seat 2, and an upper template 401 is fixed on the other side, that is, the upper template 401 is vertically pressed down by the same pressing unit as the pressing plate device 1, so that while the pressing plate device 1 is brazing the pot body 101 on the support seat 2, the copper plate 102 and the brazing plate 103 on the lower template 402 are pressed into one body by the downward pressure of the upper template 401.

[0041] The upper template 401 and the lower template 402 are both provided with ejector pins 403. When in use, the stacking order of the brazing plate 103-copper plate 102-brazing plate 103 is placed on the lower template 402 from bottom to top, and then after the upper template 401 is pressed down and matched with the lower template 402, the brazing plate 103 is riveted to the upper and lower surfaces of the copper plate 102 through the ejector pins 403 to form a whole, and then the integrated copper plate 102 and the brazing plate 103 combination are placed on the pot body 101, and then the stainless steel bottom plate is placed on the top, and after the pressing and matching of the pressing plate device 1 and the support seat 2, the above-mentioned stainless steel bottom plate-copper plate-pot body are pressed into one.

[0042] In order to automatically place the pressed copper plate 102 and the brazing plate 103 as a whole on the pot body 101 to improve the circulation efficiency, the riveting assembly 4 also includes a riveting seat 404, and the lower template 402 is flippably arranged on the riveting seat 404. The lower template 402 is provided with a flip arm 405 on the side close to the support seat 2, and the flip arm 405 is provided with a rotating shaft 406. The lower template 402 is rotatably arranged on the riveting seat 404 through the rotating shaft 406. The rotating shaft 406 is fixed with a gear 407. The riveting seat 404 is slidably provided with a rack 408 that drives the lower template 402 to flip and meshes with the gear 407. Figure 1 As shown, when the rack 408 slides vertically upward, the gear 407 can be driven to rotate around the fulcrum on the left side of the rivet seat 404, so that the lower template 402 is flipped toward the side of the support seat 2, and then after the lower template 402 is flipped 180°, the copper plate 102 pressed into one with the solder plate 103 on the lower template 402 is placed on the pot body 101 on the support seat 2, realizing the automatic placement of the copper plate 102 and the solder plate 103.

[0043] The rivet seat 404 is provided with a guide seat 409 for guiding the rack 408. The upper end of the rack 408 is meshed with the gear 407, and the lower end is fixed with a guide rod 410. The guide rod 410 slides through the guide seat 409. After the lower end of the guide rod 410 guides and passes through the guide seat 409, a pull rope plate 411 is fixedly provided. The pull rope plate 411 is provided with a pull rope 412 for driving the guide rod 410 to slide. That is, when the pull rope 412 is pulled upward, it can drive the guide rod 410 to slide, and further drive the rack 408 to slide upward and then drive the gear 407 to rotate, thereby realizing the flipping of the lower template 402.

[0044] The rotating assembly 3 includes a driving assembly 5 arranged below the rotating frame 302, and the driving assembly 5 is used to cooperate with the pull rope 412 and pull the pull rope 412 to flip the lower mold 402. Specifically, the driving assembly 5 includes a frame body 501 and a driving block 502, and the driving block 502 is connected to the pull rope 412, that is, one end of the pull rope 412 is passed through the guide seat 409 and then fixedly connected to the pull rope plate 411, and the other end is passed through the frame body 501 and then fixedly connected to the driving block 502. A pull rope sleeve 503 that cooperates with the pull rope 412 is provided between the frame body 501 and the guide seat 409. When the driving block 502 is driven, the rack 408 can be driven to slide through the pull rope 412 to drive the lower mold plate 402 to flip.

[0045] The driving block 502 is a magnetic block, and a strong magnetic block 305 cooperating with the driving block 502 is provided on the rotating frame 302. In this embodiment, two sets of positioning rings 303 are provided, and two strong magnetic blocks 305 need to be provided, that is, one is provided at the corresponding position of the rotating frame 302 and the positioning ring 303. When the rotating frame 302 rotates 180°, the strong magnetic block 305 attracted to the driving block 502 is disengaged, and then the driving block 502 is reset and re-adsorbed with the strong magnetic block 305 located above the reset driving block 502, that is, when the rotating frame 302 rotates one station (when the pot body 101 is circulated), ), the driving block 502 absorbs the strong magnetic block 305, rotates and pulls the pull rope 412 to make the rack 408 slide, and then the lower template 402 is flipped. After the lower template 402 is flipped, the assembly of the copper plate 102 and the brazing plate 103 is placed on the new pot body 101 after circulation, which is used for the next brazing; in order to realize the reset of the driving block 502, a reset spring can be set between the pull rope plate 411 and the guide seat 409, and a reset torsion spring can also be set between the rotating shaft 406 and the rivet seat 404. This is a conventional design used by technicians in this field to reset the mechanical structure, and will not be elaborated on here.

[0046] In order to ensure that the assembly of the copper plate 102 and the solder plate 103 after riveting is detached from the lower template 402 after flipping 180°, and also to prevent the copper plate 102 from falling during the flipping process, an adsorption component is provided on the riveting seat 404, and the adsorption component includes a capsule 8 and an adsorption hole 9 provided on the lower template 402. The capsule 8 is provided between the rack 408 and the guide seat 409, and the adsorption holes 9 are provided on both sides of the lower template 402. The capsule 8 is connected to the adsorption holes 9 through an electromagnetic valve 10. When the rack 408 slides upward, the capsule 8 can be stretched to generate adsorption force, so that the adsorption holes 9 adsorb the copper plate 102.

[0047] A proximity switch 11 is provided on the upper end surface of the lower template 402, and the proximity switch 11 is electrically connected to the solenoid valve 10. When the lower template 402 is flipped 180°, the proximity switch 11 detects the pot body 101, and the solenoid valve 10 is powered off, so that the capsule 8 is deflated, and the adsorption hole 9 is separated from the adsorption of the copper plate 102, so that the combined rivet of the copper plate 102 and the brazing plate 103 falls onto the pot body 101 as a whole for the next step of brazing.

[0048] A welding process of an automatic welding device for a composite bottom of a cookware: The process is as follows:

[0049] S1: Place the pot body 101 on the positioning ring 303 away from the support seat 2, and put the brazing plate 103-copper plate 102-brazing plate 103 on the lower template 402 in sequence, start the pressing plate device 1 to press down, and then the upper template 401 slides down and the brazing plate 103 is riveted to the upper and lower surfaces of the copper plate 102 through the ejector pin 403;

[0050] S2: Start the rotating assembly 3 and the lifting unit 201 at the same time, lower the support seat 2 to below the rotating frame 302, and the rotating assembly 3 drives the rotating frame 302 to rotate 180°, and rotate the positioning ring 303 where the pot body 101 is placed to above the support seat 2;

[0051] S3: While the rotating frame 302 is rotating, the strong magnetic block 305 adsorbs the driving block 502 so that the driving block 502 pulls the guide rod 410 to slide, and further drives the rack 408 to drive the gear 407 to flip, so that the lower template 402 flips 180°. After the rotating frame 302 rotates 180°, the assembly of the copper plate 102 and the solder plate 103 in the lower template 402 is flipped and placed above the pot body 1. At the same time, the strong magnetic block 305 and the driving block 502 are just disconnected, and the lower template 402 is reset by the reset torsion spring or the reset spring, and the driving block 502 is also reset;

[0052] S4: Then, the stainless steel bottom plate is placed on the assembly of the copper plate 102 and the brazing plate 103, and the brazing plate 103-copper plate 102-brazing plate 103 for the next riveting are placed on the lower template 402 in sequence, the pressing plate device 1 is started to press down, and at the same time, the lifting platform 202 on the support seat 2 rises and abuts against the inner bottom surface of the pot body 101, and the heating component is started, and the pot body 101, the copper plate 102 and the stainless steel bottom plate are brazed into one by heating and melting the brazing plate 103;

[0053] S5: In step S3, during the flipping process of the lower template 402 driven by the rack 408, the rack 408 slides and is stretched by the capsule 8 to make the adsorption hole 9 adsorb the copper plate 102. Then, the lower template 402 is flipped 180° and placed above the support seat 2. The proximity switch 11 senses the pot body 101 and triggers the solenoid valve 10 to deflate, so that the adsorption hole 9 is separated from the adsorption of the copper plate 102, and the copper plate 102 falls onto the pot body 101.

[0054] Example 2: See Figure 1-Figure 7 .

[0055] The present embodiment is a further improvement on the embodiment 1. Specifically, the present embodiment optimizes the specific structure of the rivet assembly 4, so that the copper plate 102 and the brazing plate 103 are more secure after being pressed into one body. At the same time, when the cookware is brazed, the welding between the copper plate 102 and the stainless steel bottom plate and the pot body 101 is more secure after the brazing plate 103 melts.

[0056] The upper mold plate 401 and the lower mold plate 402 are both provided with a plurality of ejector pins 403 which are symmetrical and obliquely slidable. Figure 3-Figure 4 As shown, in this embodiment, the setting form and driving sliding form of the ejector pin 403 in the upper template 401 and the lower template 402 are the same. Therefore, taking the setting structure of the ejector pin 403 in the lower template 402 as an example, the lower template 402 is provided with a plurality of sliding holes 413 cooperating with the ejector pin 403, and the ejector pins 403 on both sides are symmetrically arranged along the neutral plane of the lower template 402, and the ejector pin direction is inclined upward from bottom to top toward the side away from the neutral plane of the lower template 402, that is, when the ejector pin 403 is ejected, it can be obliquely inserted into the solder plate 103 and the copper plate 102.

[0057] The lower template 402 is provided with a sliding plate 6 for driving the ejector 403 to slide. The sliding plate 6 and the ejector 403 are connected by a connecting rod 601. The two ends of the connecting rod 601 are rotatably connected to the lower end of the ejector 403 and the supporting feet on the upper end surface of the sliding plate 6 through a rotating pin. When the sliding plate 6 slides upward, the ejector 403 can be driven by the connecting rod 601 to slide obliquely along the sliding hole 413 and inserted into the solder plate 103 and the copper plate 102.

[0058] A sliding cavity 602 matched with the sliding plate 6 is provided in the lower template 402, and a first spring 603 for resetting the sliding plate 6 is provided between the sliding plate 6 and the sliding cavity 602. Driving rods 604 for driving the sliding plate 6 to slide vertically are symmetrically provided on both sides of the lower template 402. One end of the driving rod 604 transversely passes through the wall of the lower template 402 and is placed outside the lower template 402, and the other end is provided with a wedge block 605 matched with the sliding plate 6. A driving inclined surface 606 is provided on the wedge block 605. When the driving rod 604 drives the inclined block 605 to slide toward the neutral surface of the lower template 402, the driving inclined surface 606 can be used to squeeze the sliding plate 6, so that the sliding plate 6 slides upward and then compresses the first spring 603, so that the ejector pin 403 is inserted into the solder plate 103 and the copper plate 102.

[0059] In order to make the rivet assembly 4 slide down through the upper template 401 and cooperate with the lower template 402, the copper plate 102 and the brazing material plate 103 are riveted, in this embodiment, a positioning seat 7 that cooperates with the rivet seat 404 is provided, and the rivet seat 404 is slidably arranged on the positioning seat 7 through the positioning rod 701, and a second spring 704 is arranged between the rivet seat 404 and the positioning seat 7, and the positioning rod 701 is preferably a non-round rod, and the positioning seat 7 is provided with a positioning hole that cooperates with the positioning rod 701, that is, the positioning hole is a non-round hole that cooperates with the positioning rod 701; the locating seat 7 is symmetrically provided with extrusion rods 702 that cooperate with the driving rod 604 on both sides, and the extrusion rods 702 are provided with transition inclined surfaces 703. When the upper template 401 slides down and combines with the lower template 402, the whole Continue to slide down, so that the rivet seat 404 slides down as a whole and compresses the second spring 704. During the sliding process, the driving rod 604 passes through the transition inclined surface 703 and is squeezed to slide to the neutral surface of the lower template 402, so that the driving inclined surface 606 slides and squeezes the sliding plate 6, and further drives the ejector pin 403 to push upward, thereby obliquely riveting the brazing plate 103 and the copper plate 102; the operation condition of the ejector pin 403 in the upper template 401 is in a mirror-symmetrical state with the lower template 402, that is, the ejector pin 403 in the upper template 401 pushes downward to rivet the brazing plate 103 above the copper plate 102 and the copper plate 102, thereby completing the simultaneous riveting of the upper and lower surfaces of the copper plate 102; preferably, the rivet seat 404 is provided with a through hole 705 for the extrusion rod 702 to pass through.

[0060] After the pressing is completed, the upper template 401 is reset by lifting the lower pressing plate 104, and the lower template 402 is reset by the second spring 704. During the reset process, the driving rod 604 is disengaged from the extrusion rod 702, so that the sliding plate 6 slides and resets under the action of the first spring 603. When the sliding plate 6 slides and resets, the ejector pin 403 is pulled by the connecting rod 601 to break away from the contact with the copper plate 102 after riveting, completing the demolding process.

[0061] A welding process of an automatic welding device for a composite bottom of a cookware, the process is as follows:

[0062] S1: Place the brazing plate 103-copper plate 102-brazing plate 103 on the lower template 402 in sequence, then start the pressing plate device 1 to slide the lower pressing plate 103 downward, driving the upper template 401 to slide downward;

[0063] S2: After the upper mold plate 401 is combined with the lower mold plate 402, the brazing plate 103-copper plate 102-brazing plate 103 are pressed tightly, and the riveting seat 404 is simultaneously driven to slide downward to compress the second spring 705;

[0064] S3: When the upper template 401 and the lower template 402 are sliding downward, the driving rod 604 thereon contacts the transition slope 703, and the driving rod 604 slides toward the neutral plane of the template under the pressure of the driving slope 703, thereby pressing the sliding plate 6 to slide toward the surface of the copper plate 102 through the driving slope 606 on the wedge block 605;

[0065] S4: After the sliding plate 6 slides, the connecting rod 601 squeezes the ejector pin 403, so that the ejector pin 403 is obliquely inserted into the brazing plate 103 and the copper plate 102 along the sliding hole 413, and the brazing plate 103 is deformed and embedded in the copper plate 102, completing the riveting of the brazing plate 103 and the copper plate 102. At the same time, pinholes are left on the surface of the copper plate 102, so that the brazing plate 103 can flow into the pinholes after being hot-melted, thereby strengthening the riveting strength between the copper plate 102, the pot body 101 and the stainless steel bottom plate;

[0066] S5: After the pressing is completed, the upper template 401 is lifted up and reset, and the lower template 402 is reset upward under the action of the second spring 704. The ejector pin 403 is separated from the solder plate 103 and the copper plate 102 during the reset process of the sliding plate 6 by the elastic force of the first spring 603.

[0067] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic welding device for a composite bottom of a cookware, comprising a pressing plate device (1) and a supporting seat (2), characterized in that: A rotating assembly (3) for rotating the pot body (101) and cooperating with the supporting seat (2) is provided on one side of the supporting seat (2), and a riveting assembly (4) for combining the copper plate (102) and the brazing material plate (103) is provided on the other side; The riveting assembly (4) comprises an upper template (401), a lower template (402) and a riveting seat (404); the upper template (401) is arranged on the pressure plate device (1), and the lower template (402) is movably arranged on the riveting seat (404); A gear (407) is provided on one side of the lower template (402), and a rack (408) matching with the gear (407) is slidably provided on the riveting seat (404); The rotating assembly (3) comprises a rotating frame (302) and a frame body (501); a positioning ring (303) for placing the pot body (101) is symmetrically provided on the rotating frame (302); a strong magnetic block (305) corresponding to the position of the positioning ring (303) is provided on the rotating frame (302); a driving block (502) matched with the strong magnetic block (305) is provided on the frame body (501); and the driving block (502) is connected to the rack (408) via a pull rope (412); A guide rod (410) is fixedly provided on the rack (408), a guide seat (409) matching the guide rod (410) is provided on the riveting seat (404), and a rope pulling plate (411) connected to the rope (412) is fixedly provided on the guide rod (410) after the guide rod (410) passes through the guide seat (409); A flip arm (405) is provided on one side of the lower template (402); one end of the flip arm (405) is fixed to the lower template (402); and the other end of the flip arm (405) is provided with a rotating shaft (406); the gear (407) is fixed on the rotating shaft (406); The upper mold plate (401) and the lower mold plate (402) are both provided with ejector pins (403) for riveting the brazing material plate (103) and the copper plate (102).

2. The automatic welding device for composite bottom of a cookware according to claim 1, characterized in that: The support seat (2) comprises a lifting unit (201) and a lifting platform (202), and the rotating frame (302) is provided with a lifting hole (304) that matches the lifting platform (202).

3. The automatic welding device for composite bottom of a cookware according to claim 1, characterized in that: A capsule (8) is provided between the rack (408) and the guide seat (409), and an adsorption hole (9) connected to the capsule (8) is provided on the lower template (402), and the capsule (8) is connected to the adsorption hole (9) via a solenoid valve (10).

4. The automatic welding device for composite bottom of a cookware according to claim 3, characterized in that: The lower template (402) is provided with a proximity switch (11), and the proximity switch (11) is electrically connected to the solenoid valve (10).

5. The automatic welding device for composite bottom of a cookware according to claim 1, characterized in that: The material of the solder plate (103) is silver-based solder.

6. The welding process of the automatic welding device for the composite bottom of a cookware according to claim 4, characterized in that: The process is as follows: S1: placing the pot body (101) on the positioning ring (303) on the side away from the support seat (2), and placing the brazing plate (103) - the copper plate (102) - the brazing plate (103) on the lower template (402) in sequence, and starting the pressing plate device (1) to press down, so that the upper template (401) slides down and the brazing plate (103) is riveted to the upper and lower surfaces of the copper plate (102) through the ejector pin (403); S2: starting the rotating assembly (3) and the lifting unit (201) at the same time, lowering the support seat (2) to below the rotating frame (302); the rotating assembly (3) drives the rotating frame (302) to rotate 180 degrees, and rotating the positioning ring (303) on which the pot body (101) is placed to above the support seat (2); S3: while the rotating frame (302) is rotating, the strong magnetic block (305) adsorbs the driving block (502) so that the driving block (502) pulls the guide rod (410) to slide, and further drives the rack (408) to drive the gear (407) to flip, so that the lower template (402) flips 180 degrees. After the rotating frame (302) rotates 180 degrees, the assembly of the copper plate (102) and the solder plate (103) in the lower template (402) is flipped and placed above the pot body (101). At the same time, the strong magnetic block (305) and the driving block (502) are just disconnected, and the lower template (402) is reset by rotating through the reset torsion spring or the reset spring, and the driving block (502) is also reset; S4: Then, the stainless steel bottom plate is placed on the assembly of the copper plate (102) and the brazing plate (103), and the brazing plate (103) - copper plate (102) - brazing plate (103) to be used for the next riveting operation are placed on the lower template (402) in sequence, and the pressing plate device (1) is started to press down, and at the same time, the lifting platform (202) on the support seat (2) rises and abuts against the inner bottom surface of the pot body (101), and the built-in heating component of the support seat (2) is started, and the pot body (101) and the copper plate (102) and the stainless steel bottom plate are brazed into one by heating and melting the brazing plate (103); In step S3, during the flipping process of the lower template (402) driven by the rack (408), the rack (408) slides and is stretched by the capsule (8) to allow the adsorption hole (9) to adsorb the copper plate (102). Subsequently, the lower template (402) flips 180 degrees and is placed above the support seat (2). The proximity switch (11) senses the pot body (101) and triggers the solenoid valve (10) to deflate, thereby causing the adsorption hole (9) to be separated from the adsorption of the copper plate (102), and the copper plate (102) then falls onto the pot body (101).

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