Resistance welding process for processing ice-making barrel

Abstract

The invention relates to the technical field of ice-making cylinder preparation, in particular to a resistance welding process for ice-making cylinder processing, which is characterized by comprising the following steps: S1, appearance detection, S2, preassembly, S3, assembly fixing, S4, roll welding positioning, S5, resistance welding and S6, blanking detection. After pressing, a roll welding mode is adopted for further fixing, when upper and lower large and small wheel roll welding electrodes compress a welding workpiece, a lower electrode moves along a spiral groove of an inner barrel body of the ice making barrel and releases electric energy, so that pipelines formed between an outer shell and the inner barrel body are seamlessly welded, a refrigerant uniformly passes through the pipelines, and the problem of blow-by between the pipelines is avoided; and the problem of poor refrigeration of the ice-making barrel is thoroughly solved.

Description

Technical Field

[0001] This invention relates to the field of ice-making drum manufacturing technology, and more specifically to a resistance welding process for ice-making drum processing. Background Technology

[0002] Most ice slush machines on the market are ice-making drums. Existing ice-making drums often simply press-fit the inner drum into the outer shell. Because the assembly dimensions of the outer drum and the inner drum cannot be guaranteed to be zero during manufacturing, gaps inevitably exist between them after assembly. During the ice-making process, the refrigerant will pass through the gap and directly enter the return pipe, resulting in a quality defect in some ice slush drums where half of the drum is frozen and the other half is not. Therefore, it is particularly important to design a resistance welding process for ice-making drum processing to solve the above problems. Summary of the Invention

[0003] To address the aforementioned problems, this invention presents a resistance welding process for ice-making cylinder manufacturing. After pressing, roll welding is used for further fixation. When the upper and lower rollers press the welding workpiece together, the lower electrode moves along the spiral groove of the inner cylinder of the ice-making cylinder and releases electrical energy, resulting in seamless welding of the pipeline formed between the outer shell and the inner cylinder. The refrigerant flows evenly through the pipeline, and there is no cross-contamination between the pipelines, thus completely solving the problem of poor cooling in the ice-making cylinder.

[0004] To solve the above-mentioned technical problems, the present invention provides a resistance welding process for ice-making cone processing, characterized by the following steps: S1: Visual inspection: The outer shell and inner cylinder of the ice maker are visually inspected to ensure that there are no defects on the surface; S2: Pre-assembly: The inner cylinder is inserted into the outer shell by press fitting to form an assembly to be welded; S3: Assembly fixing: Use roll welding fixtures to limit and fix the assembly; S4: Roll welding positioning: Start the roll welding machine set on the roll welding fixture, so that the large and small roller welding electrodes contact the outer wall of the outer shell and the inner wall of the inner cylinder of the assembly respectively. The large and small roller welding electrodes are widened electrodes. S5: Resistance welding: Using a roller welding fixture and a roller welding machine, the resistance welding of the outer shell and inner cylinder is completed while the assembly is rotating and moving forward. S6: Material Inspection: The welded assembly is removed from the welding fixture, and after cooling, it is sent to the real-time imaging system for imaging inspection.

[0005] Further, in step S1: after the appearance inspection, the surface is cleaned. First, the outer shell and inner cylinder are wiped with a clean wiping cloth, and then an air gun is used to blow air to clean the surface from all directions.

[0006] Furthermore, the real-time imaging system in step S6 is an X-ray real-time imaging system, which rotates the ice-making cylinder during the detection process and visually observes the overall assembly of the outer shell and inner cylinder through imaging.

[0007] Furthermore, the welding fixture in step S3 specifically consists of a fixture base plate, an assembly fixing fixture, an L-shaped frame, a rotary drive servo motor, and a translation mechanism. The L-shaped frame is connected to the fixture base plate through the translation mechanism, and the rotary drive servo motor is mounted on the side wall of the L-shaped frame, with its output shaft end passing through the L-shaped frame and connected to the assembly fixing fixture.

[0008] Furthermore, the assembly fixing fixture includes a U-shaped fixing clamp, a limiting clamp, a spring, a cam, and a cam rotation drive motor. A limiting clamp is movably connected to the upper and lower sides of the right end of the U-shaped fixing clamp, with the two limiting clamps facing each other. The end of the limiting clamp facing the ice-making cylinder assembly has an arc-shaped groove matching the outer wall of the outer shell. A cam is installed in each of the upper and lower ends of the U-shaped fixing clamp. The cam is driven to rotate by the cam rotation drive motor. A groove for placing the spring is opened on each of the upper and lower end faces of the U-shaped fixing clamp. One end of the spring is connected to the inner wall of the limiting clamp, and the other end is connected to the groove. Under the action of the spring, the limiting clamp cooperates with the right end face of the U-shaped fixing clamp to limit and clamp the folded outer edge of the outer shell in the ice-making cylinder assembly. The rotation of the cam pushes the limiting clamp to separate it from the outer wall and the folded outer edge of the outer shell in the ice-making cylinder assembly.

[0009] Furthermore, a protrusion structure is provided on the inner wall of the limiting clamp at the end facing the outer edge of the fold, and the protrusion structure matches the positioning groove opened on the outer edge of the fold.

[0010] Two locking cylinders are installed on the left end face of the convex-shaped fixing bracket. The two locking cylinders are set one above the other and face the two limiting clamps. The output shaft of the locking cylinder is connected to the locking rod. The limiting clamp has a locking hole at the position relative to the locking rod. The locking rod extends into the locking hole under the push of the locking cylinder to lock the limiting clamp.

[0011] Furthermore, the translation mechanism includes a lead screw, a slide rail, a slider, a lead screw rotation drive servo motor, and a lead screw connecting cylinder. The lead screw rotation drive servo motor is installed on the top left end of the tooling base plate, and its output shaft is connected to the horizontally arranged lead screw. A slide rail is fixed on each of the front and rear sides of the tooling base plate. The slide rail is parallel to the lead screw. The L-shaped frame is connected to the slide rail and the lead screw respectively through the slider fixed at the bottom and the lead screw connecting cylinder. A threaded through hole matching the lead screw is opened between the left and right ends of the lead screw connecting cylinder.

[0012] Furthermore, the roll welding machine in step S4 specifically includes a roll welding host fixed to the top right end of the tooling base plate, a large wheel electrode, and a small wheel electrode. The large wheel electrode and the small wheel electrode are arranged one above the other and rotated by the first drive shaft and the second drive shaft, respectively. Both the first drive shaft and the second drive shaft are hollow shafts. The roll welding host is electrically connected to the large wheel electrode and the small wheel electrode through wires arranged inside the first drive shaft and the second drive shaft, respectively.

[0013] Furthermore, the roll welding host is equipped with a large wheel rotation drive mechanism and a small wheel rotation drive mechanism. The first drive shaft and the second drive shaft extend into the roll welding host and are connected to the large wheel rotation drive mechanism and the small wheel rotation drive mechanism, respectively. The large wheel rotation drive mechanism and the small wheel rotation drive mechanism are both connected to the roll welding host through a lifting mechanism.

[0014] With the above structure, the present invention has the following beneficial effects: This invention further fixes the ice maker by roll welding after pressing. When the upper and lower rollers press the welding workpiece together, the lower electrode moves along the spiral groove of the inner cylinder of the ice maker and releases electrical energy, so that the pipeline formed between the outer shell and the inner cylinder is seamlessly welded. The refrigerant passes through the pipeline evenly, and there is no problem of gas leakage between the pipelines, which completely solves the problem of poor cooling of the ice maker.

[0015] This invention employs widened large and small roller welding electrodes. This design prevents damage to the surface of the ice-making drum during the welding process, thus increasing its practicality.

[0016] 3. The assembly fixing fixture in this invention can quickly complete the assembly and disassembly of the ice-making cylinder assembly, greatly improving processing efficiency. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a structural diagram of the roll welding fixture and roll welding machine.

[0019] Figure 2 Structural diagram of the fixture for fixing the assembly.

[0020] Figure 3 for Figure 2 A magnified view of A in the middle.

[0021] Figure 4 This is a structural diagram of the ice-making container assembly. Detailed Implementation

[0022] The technical solution of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be noted that certain terms indicating orientation or positional relationships are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0024] In the description of this invention, it should be noted that the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] The present invention will be further described in detail below through specific embodiments.

[0026] This invention provides a resistance welding process for ice cone manufacturing, specifically including the following steps: S1: Visual inspection: The outer shell and inner cylinder of the ice maker are visually inspected to ensure that there are no defects on the surface; S2: Pre-assembly: The inner cylinder is inserted into the outer shell by press fitting to form an assembly to be welded; S3: Assembly fixing: Use roll welding fixtures to limit and fix the assembly; S4: Roll welding positioning: Start the roll welding machine set on the roll welding fixture, so that the large and small roller welding electrodes contact the outer wall of the outer shell and the inner wall of the inner cylinder of the assembly respectively. The large and small roller welding electrodes are widened electrodes. S5: Resistance welding: Using a roller welding fixture and a roller welding machine, the resistance welding of the outer shell and inner cylinder is completed while the assembly is rotating and moving forward. S6: Material Inspection: The welded assembly is removed from the welding fixture, and after cooling, it is sent to the real-time imaging system for imaging inspection.

[0027] This invention further fixes the ice maker by roll welding after pressing. When the upper and lower roller welding electrodes press the workpiece together, the lower electrode moves along the spiral groove of the inner cylinder of the ice maker and releases electrical energy, so that the pipeline formed between the outer shell and the inner cylinder is seamlessly welded. The refrigerant passes through the pipeline evenly, and there is no problem of air leakage between the pipelines, which completely solves the problem of poor cooling of the ice maker. In addition, this invention uses widened roller welding electrodes. This design will not damage the surface of the ice maker during the roll welding process, which increases its practicality.

[0028] Step S1 above: After visual inspection, clean the surface. First, wipe the outer shell and inner cylinder with a clean cloth, and then use an air gun to blow air to clean the surface from all directions.

[0029] The real-time imaging system in step S6 above is an X-ray real-time imaging system. During the detection process, the ice-making cylinder is rotated, and the overall assembly of the outer shell and inner cylinder is observed intuitively through imaging. like Figure 1 The specific components of the roll welding fixture in step S3 are a fixture base plate 1, an assembly fixing fixture, an L-shaped frame 6, a rotary drive servo motor 7, and a translation mechanism. The L-shaped frame is connected to the fixture base plate through the translation mechanism. The rotary drive servo motor is mounted on the side wall of the L-shaped frame and its output shaft end passes through the L-shaped frame and is connected to the assembly fixing fixture.

[0030] like Figure 2 , Figure 3 and Figure 4 The assembly fixing fixture shown includes a U-shaped fixing clamp 8, a limiting clamp 15, a spring 19, a cam 17, and a cam rotation drive motor. A limiting clamp is movably connected to the upper and lower sides of the right end of the U-shaped fixing clamp, and the two limiting clamps are arranged opposite each other. The end of the limiting clamp facing the ice cylinder assembly has an arc-shaped groove that matches the outer wall of the outer shell. A cam is installed in the upper and lower ends of the U-shaped fixing clamp. The cam is driven to rotate by the cam rotation drive motor. A groove for placing the spring is opened on the upper and lower end faces of the U-shaped fixing clamp. One end of the spring is connected to the inner wall of the limiting clamp, and the other end is connected to the groove. Under the action of the spring, the limiting clamp cooperates with the right end face of the U-shaped fixing clamp to limit and clamp the folded outer edge 5-1 of the outer shell of the ice cylinder assembly 5. The rotation of the cam pushes the limiting clamp to separate it from the outer wall and the folded outer edge of the outer shell of the ice cylinder assembly 5. The assembly fixing fixture in this invention can quickly complete the assembly and disassembly of the ice maker assembly, greatly improving processing efficiency.

[0031] like Figure 3 The inner wall of the limiting clamp plate facing the outer edge of the fold is provided with a protrusion structure 16, which matches the positioning groove formed on the outer edge of the fold. This design ensures that the ice-making cylinder assembly rotates synchronously with the assembly fixing clamp.

[0032] like Figure 3 Two locking cylinders 14 are installed on the left end face of the convex-shaped fixing bracket shown. The two locking cylinders are positioned one above the other and directly opposite the two limiting clamping plates. The output shaft ends of the locking cylinders are connected to locking rods 18. Locking holes are opened on the limiting clamping plates relative to the locking rods. The locking rods are pushed into the locking holes by the locking cylinders to lock the limiting clamping plates. This structure of the present invention can limit the limiting clamping plates after clamping, preventing them from opening accidentally.

[0033] like Figure 2 The translation mechanism shown includes a lead screw 11, a slide rail 10, a slider 13, a lead screw rotation drive servo motor 9, and a lead screw connecting cylinder 12. The lead screw rotation drive servo motor is installed on the top left end of the tooling base plate, and its output shaft is connected to the horizontally arranged lead screw. A slide rail is fixed on each of the front and rear sides of the tooling base plate. The slide rail is parallel to the lead screw. The L-shaped frame is connected to the slide rail and the lead screw respectively through the slider fixed at the bottom and the lead screw connecting cylinder. A threaded through hole matching the lead screw is opened between the left and right ends of the lead screw connecting cylinder.

[0034] like Figure 2 The roller welding machine in step S4 specifically includes a roller welding host 2, a large roller electrode 3, and a small roller electrode 4, which are fixed to the top right end of the tooling base plate. The large roller electrode and the small roller electrode are arranged one above the other and rotated by the first drive shaft and the second drive shaft, respectively. Both the first drive shaft and the second drive shaft are hollow shafts. The roller welding host is electrically connected to the large roller electrode and the small roller electrode through wires arranged inside the first drive shaft and the second drive shaft, respectively.

[0035] The aforementioned roll welding host is equipped with a large wheel rotation drive mechanism and a small wheel rotation drive mechanism. The first drive shaft and the second drive shaft extend into the roll welding host and are connected to the large wheel rotation drive mechanism and the small wheel rotation drive mechanism, respectively. The large wheel rotation drive mechanism and the small wheel rotation drive mechanism are both connected to the roll welding host through a lifting mechanism.

[0036] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A resistance welding process for processing ice cones, characterized in that: Specifically, the following steps are included: S1: Visual inspection: The outer shell and inner cylinder of the ice maker are visually inspected to ensure that there are no defects on the surface; S2: Pre-assembly: The inner cylinder is inserted into the outer shell by press fitting to form an assembly to be welded; S3: Assembly fixing: Use roll welding fixtures to limit and fix the assembly; S4: Roll welding positioning: Start the roll welding machine set on the roll welding fixture, so that the large and small roller welding electrodes contact the outer wall of the outer shell and the inner wall of the inner cylinder of the assembly respectively. The large and small roller welding electrodes are widened electrodes. S5: Resistance welding: Using a roller welding fixture and a roller welding machine, the resistance welding of the outer shell and inner cylinder is completed while the assembly is rotating and moving forward. S6: Material Inspection: The welded assembly is removed from the welding fixture, and after cooling, it is sent to the real-time imaging system for imaging inspection.

2. The resistance welding process for ice-making cone processing according to claim 1, characterized in that: Step S1: After visual inspection, the surface is cleaned. First, the outer shell and inner cylinder are wiped with a clean cloth, and then an air gun is used to blow air through the surface for all-round cleaning.

3. The resistance welding process for ice-making cone processing according to claim 1, characterized in that: The real-time imaging system in step S6 is an X-ray real-time imaging system. During the detection process, the ice-making cylinder is rotated, and the assembly of the outer shell and inner cylinder is observed intuitively through imaging.

4. The resistance welding process for ice-making cone processing according to claim 1, characterized in that: The specific components of the roll welding fixture in step S3 are a fixture base plate (1), an assembly fixing fixture, an L-shaped frame (6), a rotary drive servo motor (7), and a translation mechanism. The L-shaped frame is connected to the fixture base plate through the translation mechanism. The rotary drive servo motor is mounted on the side wall of the L-shaped frame and its output shaft end passes through the L-shaped frame and is connected to the assembly fixing fixture.

5. The resistance welding process for ice-making cone processing according to claim 4, characterized in that: The assembly fixing fixture includes a U-shaped fixing clamp (8), a limiting clamp (15), a spring (19), a cam (17), and a cam rotation drive motor. A limiting clamp is movably connected to the upper and lower sides of the right end of the U-shaped fixing clamp. The two limiting clamps are arranged opposite to each other. An arc-shaped groove matching the outer wall of the outer shell is opened at the end of the limiting clamp facing the ice cylinder assembly. A cam is installed in the upper and lower ends of the U-shaped fixing clamp. The cam is driven to rotate by the cam rotation drive motor. A groove for placing the spring is opened on the upper and lower end faces of the U-shaped fixing clamp. One end of the spring is connected to the inner wall of the limiting clamp, and the other end is connected to the groove. Under the action of the spring, the limiting clamp cooperates with the right end face of the U-shaped fixing clamp to limit and clamp the folded outer edge (5-1) of the outer shell in the ice cylinder assembly (5). The rotation of the cam pushes the limiting clamp to separate it from the outer wall and the folded outer edge of the outer shell in the ice cylinder assembly (5).

6. The resistance welding process for ice-making cone processing according to claim 5, characterized in that: The inner wall of the limiting clamp facing the outer edge of the fold is provided with a protrusion structure (16), which matches the positioning groove opened on the outer edge of the fold.

7. The resistance welding process for ice-making cone processing according to claim 5, characterized in that: Two locking cylinders (14) are installed on the left end face of the convex-shaped fixing bracket. The two locking cylinders are set one above the other and face the two limiting clamps. The output shaft of the locking cylinder is connected to the locking rod (18). The limiting clamp is provided with a locking hole at the position of the locking rod. The locking rod is pushed into the locking hole by the locking cylinder to lock the limiting clamp.

8. The resistance welding process for ice-making cone processing according to claim 4, characterized in that: The translation mechanism includes a lead screw (11), a slide rail (10), a slider (13), a lead screw rotation drive servo motor (9), and a lead screw connecting cylinder (12). The lead screw rotation drive servo motor is installed on the top left end of the tooling base plate, and its output shaft is connected to the horizontally set lead screw. A slide rail is fixed on each of the tooling base plates on the front and rear sides of the lead screw. The slide rail is parallel to the lead screw. The L-shaped frame is connected to the slide rail and the lead screw respectively through the slider fixed at the bottom and the lead screw connecting cylinder. A threaded through hole matching the lead screw is opened between the left and right ends of the lead screw connecting cylinder.

9. The resistance welding process for ice-making cone processing according to claim 4, characterized in that: The roller welding machine in step S4 specifically includes a roller welding host (2), a large roller electrode (3), and a small roller electrode (4) fixed on the top right end of the tooling base plate. The large roller electrode and the small roller electrode are set one above the other and rotated by the first drive shaft and the second drive shaft respectively. The first drive shaft and the second drive shaft are both hollow shafts. The roller welding host is electrically connected to the large roller electrode and the small roller electrode respectively through wires arranged inside the first drive shaft and the second drive shaft.

10. The resistance welding process for ice-making cone processing according to claim 9, characterized in that: The roll welding host is equipped with a large wheel rotation drive mechanism and a small wheel rotation drive mechanism. The first drive shaft and the second drive shaft extend into the roll welding host and are connected to the large wheel rotation drive mechanism and the small wheel rotation drive mechanism, respectively. The large wheel rotation drive mechanism and the small wheel rotation drive mechanism are both connected to the roll welding host through a lifting mechanism.

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