Welding needle grinding device for welding vacuum flask

Abstract

The welding needle grinding device comprises a lifting frame, a welding table and an automatic grinding mechanism, the welding table is installed at the top end of the lifting frame, a groove is formed in the top of the welding table in a concave mode, a hole penetrating through the welding table is formed in the bottom face of the groove, and a lifting driving assembly is arranged on the lifting frame; the lifting driving assembly is connected with a welding needle, the welding needle is aligned to the open hole, the diameter of the open hole is larger than that of the welding needle, the welding needle is driven by the lifting driving assembly to ascend and descend along the Z axis, and the automatic grinding mechanism comprises a double-axis moving driving frame and a grinding wheel assembly. The double-shaft moving driving frame is located on one side of the welding table, the grinding wheel assembly is installed on the double-shaft moving driving frame and located above the welding table, the double-shaft moving driving frame drives the grinding wheel assembly to move in a reciprocating mode in the X-axis direction and the Y-axis direction, and the grinding wheel assembly conducts grinding through rotation of a grinding wheel. The welding pin polishing device realizes automatic polishing of the welding pin.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of thermos bottle production, and more particularly to a welding needle polishing device for thermos bottle welding. BACKGROUND

[0002] In the production of thermos bottles, the bottle body needs to be welded with a metal sheet at the bottom to cover the exhaust hole reserved for forming a vacuum sandwich. The welding of the bottle body and the metal sheet is usually carried out by resistance welding. Specifically, a welding needle is arranged on a welding table, a groove is arranged on the top of the welding table for positioning the bottle body and placing the metal sheet, and an opening is arranged at the bottom end of the groove. The welding needle is located in the opening, and the welding needle is connected with a lifting mechanism. The welding needle is driven to ascend through the opening and contact the metal sheet to realize welding.

[0003] When resistance welding is performed, high temperature is generated to cause oxidation or corrosion of the surface of the welding needle. The oxidation or corrosion of the surface of the welding needle can cause poor contact between the welding needle and the workpiece, affecting current transmission and welding quality. Therefore, the welding needle needs to be polished. In the related art, the welding needle is polished by manually holding a polishing device. In this way, the welding needle is polished by workers at intervals, which consumes a lot of human resources and has high labor intensity. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the problem that when the bottle body and the metal sheet of the thermos bottle are welded by resistance welding, the welding needle is polished by manually holding a polishing device, which consumes a lot of human resources and has high labor intensity, the application provides a welding needle polishing device for thermos bottle welding.

[0005] A welding needle polishing device for thermos bottle welding, comprising a lifting frame, a welding table, and an automatic polishing mechanism. The welding table is installed at the top end of the lifting frame. A groove is arranged on the top of the welding table, and an opening is arranged on the bottom surface of the groove. A lifting driving assembly is arranged on the lifting frame. The lifting driving assembly is connected with a welding needle. The welding needle is located in the opening, and the diameter of the opening is greater than the diameter of the welding needle. The lifting driving assembly drives the welding needle to ascend and descend along the Z-axis. The automatic polishing mechanism comprises a double-shaft moving driving frame and a grinding wheel assembly. The double-shaft moving driving frame is located on one side of the welding table, and the grinding wheel assembly is installed on the double-shaft moving driving frame and located above the welding table. The double-shaft moving driving frame drives the grinding wheel assembly to reciprocate along the X and Y axes. The grinding wheel assembly polishes by rotating the grinding wheel.

[0006] Preferably, the lifting driving assembly comprises a lifting platform, a first lead screw and a first servo motor, a Z-axis sliding rail parallel to the Z-axis is arranged on the lifting frame, a Z-axis sliding block is arranged on the Z-axis sliding rail in a sliding manner, the lifting platform is fixedly connected with the Z-axis sliding block, the bottom end of the welding needle is fixedly connected with the lifting platform, the first lead screw is rotationally connected with the lifting frame and is parallel to the Z-axis, the lifting platform is threadedly connected with the first lead screw, and the first servo motor is fixed on the lifting frame and connected with the first lead screw for driving the first lead screw to rotate.

[0007] Preferably, the double-shaft moving driving frame comprises a frame body, a first moving platform, a second moving platform, a second lead screw, a second servo motor, a third lead screw and a third servo motor, an X-axis sliding rail is arranged on the frame body, the X-axis sliding rail is parallel to the X-axis and is provided with an X-axis sliding block in a sliding manner, the first moving platform is fixedly connected with the X-axis sliding block, the second lead screw is parallel to the X-axis and is rotationally connected with the frame body, the first moving platform is threadedly connected with the lead screw, the second servo motor is fixed on the frame body and connected with the second lead screw for driving the second lead screw to rotate, the first moving platform is provided with a Y-axis sliding rail, the Y-axis sliding rail is parallel to the Y-axis, the Y-axis sliding rail is provided with a Y-axis sliding block in a sliding manner, the second moving platform is fixed on the Y-axis sliding block, the third lead screw is rotationally connected with the first moving platform and is parallel to the Y-axis, the second moving platform is threadedly connected with the third lead screw, the third servo motor is fixed on the first moving platform and connected with the third lead screw for driving the third lead screw to rotate, and the grinding wheel assembly is mounted on the second moving platform.

[0008] Preferably, the grinding wheel assembly comprises a fourth servo motor, a connecting arm and a grinding wheel, the connecting arm is connected with the double-shaft moving driving frame at one end, the grinding wheel is provided with a rotating shaft penetrating through the axis center of the grinding wheel, the rotating shaft is rotationally connected with the end of the connecting arm away from the double-shaft moving driving frame, the grinding wheel is above the welding platform, the fourth servo motor is fixed on the double-shaft moving driving frame, a belt pulley is arranged on the fourth servo motor and the rotating shaft, and a transmission belt is sleeved on the two belt pulleys.

[0009] Preferably, the scrap blocking mechanism comprises a baffle, a connecting plate, a transverse sliding rail, a transverse sliding block, and a transverse driving member, the transverse sliding rail is arranged transversely on the side wall of the welding table, the transverse sliding block is in sliding connection with the transverse sliding rail, the connecting plate is arranged vertically and is fixedly connected with the transverse sliding block at the bottom end, the baffle is fixedly connected with the top end of the connecting plate and is arranged above the welding table, the baffle shields the top surface of the welding table and is provided with an avoiding hole, the avoiding hole is aligned with the opening and has a size matching that of the welding needle for allowing the welding needle to pass out and be close to the outer wall of the welding needle, and the transverse driving member is fixed to the side wall of the welding table and is connected with the connecting plate for driving the connecting plate to move along the length direction of the transverse sliding rail.

[0010] Preferably, one side of the baffle is connected with a scrap frame, and the opposite side of the baffle is connected with a blowing block, the blowing block is hollow inside and uniformly arranged with a plurality of air outlets on the side facing the scrap frame, one end of the blowing block is connected with a gas nozzle, the gas nozzle is in communication with the hollow inside of the blowing block, and the scrap frame is connected with a material guide pipe.

[0011] The application has the beneficial technical effects that the recess is used for positioning the bottle body, the lifting driving assembly is used for driving the welding needle to realize the lifting contact with the metal sheet, the welding needle is electrically connected with the external power supply to realize the electrification and generate the resistance heat at the contact position with the metal sheet to realize the welding. When the welding needle is polished, the welding needle is lifted by the lifting driving assembly to pass through the opening and the recess to the top of the welding table, the grinding wheel assembly is driven by the double-shaft moving driving frame to be close to the welding needle to polish the welding needle, the double-shaft moving driving frame is used for driving the grinding wheel assembly to move along the X and Y axes, and the lifting driving assembly is used for driving the welding needle to lift, so that the grinding wheel assembly polishes the welding needle in three-axis directions, the range of the polishing is wide, the manual operation is replaced by the machine to polish the welding needle, the labor intensity of the manual operation is reduced, the human resources are saved, the automatic polishing device can reduce the workers to contact the high-speed rotating polishing tool, the risk of injury is reduced, and the work safety is improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a whole structure schematic view of a welding needle polishing device for a thermos bottle welding.

[0013] Figure 2 It is a connecting structure schematic view of a welding table and a scrap blocking assembly.

[0014] Reference numerals: 1, lifting frame; 11, lifting drive assembly; 111, lifting platform; 112, first lead screw; 113, first servo motor; 12, welding needle; 13, Z-axis sliding rail; 14, Z-axis sliding block; 2, welding platform; 3, automatic polishing mechanism; 31, double-shaft moving drive frame; 311, frame body; 3111, X-axis sliding rail; 3112, X-axis sliding block; 312, first moving platform; 3121, Y-axis sliding rail; 3122, Y-axis sliding block; 313, second moving platform; 314, second servo motor; 315, third lead screw; 316, third servo motor; 32, grinding wheel assembly; 321, fourth servo motor; 322, connecting arm; 323, grinding wheel; 324, transmission belt; 4, scrap blocking mechanism; 41, baffle; 411, avoiding hole; 42, connecting plate; 43, transverse sliding rail; 44, transverse sliding block; 45, transverse driving piece; 46, scrap frame; 461, material guide pipe; 47, air blowing block; 471, air outlet hole; 472, air nozzle. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0016] Reference Figure 1The utility model provides a thermos bottle welding is with welding needle polishing device, including lifting frame 1, welding station 2, automatic polishing mechanism 3, welding station 2 installs at the top of lifting frame 1, and the top recessed groove of welding station 2 is set up and is set up in the bottom surface of recessed groove the aperture that goes through its itself, and the bottle body is realized accurate placement through the realization positioning bottle body of recessed groove, and the metal sheet is placed in the aperture, and lifting frame 1 is provided with lifting drive assembly 11, and welding needle 12 is connected to lifting drive assembly 11, and welding needle 12 is aligned aperture and the diameter of aperture is greater than the diameter of welding needle 12, and welding needle 12 is driven along Z axle and is lifted through lifting drive assembly 11, and welding needle 12 is driven and goes up through the aperture and realizes welding needle 12 contact to the metal sheet when welding, and welding needle 12 is electrically connected to external power supply and realizes electrification and generates resistance heat at the contact of metal sheet and realizes the welding fixation of bottle body and metal sheet, and the material of welding needle 12 can be selected as pure copper, copper alloy, black copper alloy, chromium copper alloy. Automatic polishing mechanism 3 includes double-shaft mobile drive frame 31 and grinding wheel assembly 32, and double-shaft mobile drive frame 31 is at the side of welding station 2 and grinding wheel assembly 32 is installed on double-shaft mobile drive frame 31 and is above welding station 2, and grinding wheel assembly 32 is driven and reciprocates along X, Y axle direction through double-shaft mobile drive frame 31, and grinding wheel assembly 32 is polished through grinding wheel rotation, and welding needle 12 is driven and goes up through the aperture and recessed groove and comes out to the top of welding station 2 by lifting drive assembly 11 when welding needle 12 is polished, and grinding wheel assembly 32 is driven and is close to welding needle 12 through double-shaft mobile drive frame 31 and is polished to welding needle 12, and double-shaft mobile drive frame 31 realizes the drive of grinding wheel assembly 32 along X, Y axle and then cooperates lifting drive assembly 11 and drives welding needle 12 to lift, and grinding wheel assembly 32 is polished in three axle directions, and the polishing range of welding needle 12 is wide, and manual operation is replaced by machine and is polished to welding needle 12, reduces the labor intensity of manual work, and it is convenient to save human resources, and automatic polishing equipment can reduce the worker and contact high-speed rotating polishing tool, reduces the risk of injury, improves work safety.

[0017] Refer to Figure 1Further, the lifting driving assembly 11 comprises a lifting platform 111, a first screw rod 112 and a first servo motor 113. A Z-axis sliding rail 13 parallel to the Z-axis is arranged on the lifting frame 1. A Z-axis sliding block 14 is slidably arranged on the Z-axis sliding rail 13. The lifting platform 111 is fixedly connected with the Z-axis sliding block 14. The bottom end of the welding needle 12 is fixedly connected with the lifting platform 111. The first screw rod 112 is rotatably connected with the lifting frame 1 and is parallel to the Z-axis. The lifting platform 111 is threadedly connected with the first screw rod 112. The first servo motor 113 is fixed on the lifting frame 1 and is connected with the first screw rod 112 (not shown in the figure). The first screw rod 112 is driven to rotate in the forward and reverse directions by the first servo motor 113. The forward and reverse rotation of the first screw rod 112 drives the lifting platform 111 to lift along the Z-axis. The lifting of the lifting platform 111 drives the welding needle 12 to lift. The lifting precision of the lifting platform 111 is high by the cooperation of the screw rod and the servo motor. The lifting stroke of the lifting platform 111 is controlled. The displacement of the welding needle 12 is controllable. The accurate polishing is facilitated during polishing.

[0018] With reference to Figure 1, further, the double-shaft moving drive frame 31 comprises a frame body 311, a first moving table 312, a second moving table 313, a second lead screw, a second servo motor 314, a third lead screw 315, and a third servo motor 316; the frame body 311 is provided with X-axis sliding rails 3111 parallel to the X-axis, the number of the X-axis sliding rails 3111 is two, and X-axis sliding blocks 3112 are slidingly connected to the two X-axis sliding rails 3111; the first moving table 312 is fixedly connected to the two X-axis sliding blocks 3112; the second lead screw is located between the two X-axis sliding rails 3111 and is rotationally connected to the frame body 311; the second lead screw is parallel to the X-axis and is threadedly connected to the first moving table 312; the second servo motor 314 is fixed to the frame body 311 and is connected to the second lead screw; the second servo motor 314 is configured to drive the lead screw to rotate in opposite directions, so that the second lead screw drives the first moving table 312 to reciprocally move along the X-axis direction; the displacement of the first moving table 312 is controllable and has high precision; the first moving table 312 is provided with Y-axis sliding rails 3121 parallel to the Y-axis, and the number of the Y-axis sliding rails 3121 is two; Y-axis sliding blocks 3122 are slidingly arranged on the two Y-axis sliding rails 3121; the second moving table 313 is fixedly connected to the two Y-axis sliding blocks 3122; the third lead screw 315 is located between the two Y-axis sliding rails 3121 and is threadedly connected to the second moving table 313; the third servo motor 316 is fixed to the first moving table 312 and is connected to the third lead screw 315; the third servo motor 316 is configured to drive the third lead screw 315 to rotate in opposite directions, so that the second moving table 313 is driven to reciprocally move along the Y-axis direction; the displacement of the second moving table 313 is controllable and has high precision; the grinding wheel assembly 32 is installed on the second moving table 313; the first moving table 312 is configured to reciprocally move along the X-axis direction, so that the second moving table 313 and the grinding wheel assembly 32 are driven to reciprocally move along the X-axis direction; the second moving table 313 is configured to reciprocally move along the Y-axis direction, so that the grinding wheel assembly 32 is driven to reciprocally move along the Y-axis direction; the grinding wheel assembly 32 has controllable displacement and high displacement precision, which facilitates the control of the grinding amount of the welding needle 12 during grinding and the driving of the welding needle 12 to ascend and descend by the lifting drive assembly 11, so that the welding needle 12 can be ground in three-axis directions, and the grinding range is wide.

[0019] With reference to Figure 1Further, the grinding wheel assembly 32 comprises a fourth servo motor 321, a connecting arm 322, a grinding wheel 323, a transmission belt 324, one end of the connecting arm 322 is connected with the second moving table 313, the grinding wheel 323 is provided with a rotating shaft penetrating through the axis thereof, the rotating shaft is rotationally connected with the end of the connecting arm 322 away from the second moving table 313, the connecting arm 322 is parallel to the X-axis, the grinding wheel 323 is above the welding table 2, the fourth servo motor 321 is fixed on the second moving table 313, and the fourth servo motor 321 and the rotating shaft are both provided with pulleys, the transmission belt 324 is sleeved on the two pulleys, the fourth servo motor 321 drives the pulley provided thereon to rotate, so as to drive the transmission belt 324 to transmit, thereby driving the pulley provided on the rotating shaft to rotate, the pulley rotationally drives the rotating shaft to rotate, and the rotating shaft rotationally drives the grinding wheel 323 to rotate, and the grinding wheel 323 is in contact with the welding needle 12 during rotation to polish the welding needle 12.

[0020] With reference to Figure 1 And Figure 2 Further, the welding needle polishing device for thermos bottle welding further comprises a scrap blocking mechanism 4, the scrap blocking mechanism 4 comprises a baffle 41, a connecting plate 42, a transverse sliding rail 43, a transverse sliding block 44 and a transverse driving member 45, the transverse sliding rail 43 is transversely arranged on the side wall of the welding table 2 and is parallel to the Y-axis, the transverse sliding block 44 is slidingly connected with the transverse sliding rail 43, the connecting plate 42 is vertically arranged and the bottom end thereof is fixedly connected with the transverse sliding block 44, the combination of the transverse sliding rail 43 and the transverse sliding block 44 is two groups of parallel arrangements, so that the sliding of the connecting plate 42 is more stable, the baffle 41 is fixedly connected with the top end of the connecting plate 42, the baffle 41 is above the welding table 2, the baffle 41 shields the top surface of the welding table 2, the baffle 41 is provided with an avoiding hole 411, the avoiding hole 411 is aligned with the hole, the size of the avoiding hole 411 matches the size of the welding needle 12 for the welding needle 12 to pass out and be close to the outer wall of the welding needle 12, and the transverse driving member 45 is fixed on the side wall of the welding table 2 and is connected with the connecting plate 42 for driving the connecting plate 42 to move along the Y-axis direction, the connecting plate 42 drives the baffle to move along the Y-axis direction, so that the baffle is dislocated with the top surface of the welding table 2, and the transverse driving member 45 is preferably a pneumatic cylinder. When the welding needle 12 is welded, the baffle is in a position shielding the top surface of the welding table 2, the welding needle 12 is driven by the lifting driving assembly 11 to ascend, the part of the welding needle 12 that needs to be polished passes out the top end of the baffle 41 through the avoiding hole 411, so that the scrap generated during polishing of the welding needle 12 is blocked by the baffle 41 and is not easy to fall into the groove arranged on the welding table 2, thereby reducing the influence on the positioning of the bottle body.

[0021] With reference to Figure 2Further, one side of the baffle 41 is connected with a scrap frame 46, and the other side of the baffle 41 is connected with a blowing block 47. The blowing block 47 is hollow inside and uniformly arranged with a plurality of air outlet holes 471 on the side facing the scrap frame 46. One end of the blowing block 47 is connected with an air nozzle 472, and the air nozzle 472 is communicated with the hollow inside of the blowing block 47. The scrap frame 46 is communicated with a material guide pipe 461. The air nozzle 472 is connected with an external blowing device. The external blowing device supplies air to the blowing block 47. The air is dispersed and blown out from the air outlet holes 471. The polishing scrap falling on the baffle 41 is blown into the scrap frame 46. The scrap frame 46 can be connected with a dust collecting bag or a dust collection device through the material guide pipe 461. The scrap falling into the scrap frame 46 is guided into the dust collecting bag or the dust collection device through the material guide pipe 461 for collection. This structure reduces the manual cleaning of the baffle 41 and reduces the labor intensity of workers.

[0022] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A flask welding needle polishing device for welding a flask, characterized by: Including the lifting frame, the welding table, the automatic polishing mechanism, the welding table is installed in the lifting frame top, the welding table top recess is provided with the recess and is equipped with the opening which penetrates its own in the recess bottom surface, the lifting frame is provided with lifting drive assembly, the lifting drive assembly is connected with the welding pin, the welding pin is located the opening and the opening diameter is greater than the welding pin diameter, through the lifting drive assembly drive the welding pin along the Z axis lifting, the automatic polishing mechanism includes double shaft movement drive frame and grinding wheel assembly, the double shaft movement drive frame is in one side of the welding table and the grinding wheel assembly is installed on the double shaft movement drive frame and is above the welding table, through the double shaft movement drive frame drive the grinding wheel assembly reciprocating movement along the X, Y axis direction, the grinding wheel assembly is polished through the grinding wheel rotation.

2. The welding needle polishing device for thermos bottle welding according to claim 1, characterized in that: The lifting drive assembly includes lifting platform, first screw rod, first servo motor, the lifting frame is provided with Z axis sliding rail parallel to Z axis, the Z axis sliding rail is provided with Z axis sliding block, the lifting platform is connected with the Z axis sliding block and is fixed, the bottom end of the welding pin is connected with the lifting platform and is fixed, the first screw rod is rotationally connected with the lifting frame and is parallel to Z axis, the lifting platform is threadedly connected with the first screw rod, the first servo motor is fixed on the lifting frame and is connected with the first screw rod for driving the first screw rod rotation.

3. The welding needle polishing device for thermos bottle welding according to claim 1, characterized in that: The double shaft movement drive frame includes frame body, first moving platform, second moving platform, second screw rod, second servo motor, third screw rod and third servo motor, the frame body is provided with X axis sliding rail, the X axis sliding rail is parallel to the X axis and is provided with X axis sliding block, the first moving platform is fixedly connected to the X axis sliding block, the second screw rod is parallel to the X axis and is rotationally connected with the frame body, the first moving platform is threadedly connected with the screw rod, the second servo motor is fixed on the frame body and is connected with the second screw rod for driving the second screw rod rotation, the first moving platform is provided with Y axis sliding rail, the Y axis sliding rail is parallel to Y axis, the Y axis sliding rail is provided with Y axis sliding block, the second moving platform is fixed on the Y axis sliding block, the third screw rod is rotationally connected with the first moving platform and is parallel to Y axis, the second moving platform is threadedly connected with the third screw rod, the third servo motor is fixed on the first moving platform and is connected with the third screw rod for driving the third screw rod rotation, the grinding wheel assembly is installed on the second moving platform.

4. The welding needle polishing device for thermos bottle welding according to claim 1, characterized in that: The grinding wheel assembly includes fourth servo motor, connecting arm, grinding wheel and transmission belt, one end of the connecting arm is connected with the double shaft movement drive frame, the grinding wheel is provided with rotating shaft penetrating its axis, the rotating shaft is rotationally connected with one end of the connecting arm away from the double shaft movement drive frame, the grinding wheel is above the welding table, the fourth servo motor is fixed on the double shaft movement drive frame, the fourth servo motor and the rotating shaft are provided with pulley, the transmission belt is sleeved on two pulleys.

5. The bottle welding needle polishing device according to claim 1, characterized in that: Also include the scrap blocking mechanism, the scrap blocking mechanism includes a baffle, connecting plate, transverse slide rail, transverse slider, transverse drive, the transverse slide rail is horizontally arranged in the side wall of the welding table, the transverse slider is slidingly connected with the transverse slide rail, the connecting plate is vertically arranged and the bottom end is fixedly connected with the transverse slider, the baffle is connected and fixed with the top end of the connecting plate, and the baffle is above the welding table, the baffle shields the top surface of the welding table and the baffle is provided with an avoiding hole, the avoiding hole is aligned with the opening, and the size of the avoiding hole matches the size of the welding needle for the welding needle to pass out and close to the outer wall of the welding needle, the transverse drive is fixed to the side wall of the welding table and connected with the connecting plate for driving the connecting plate to move along the length direction of the transverse slide rail.

6. The welding needle polishing device for thermos bottle welding according to claim 5, characterized in that: One side of the baffle is connected with a scrap frame, and the other side of the baffle is connected with a blowing block, the blowing block is hollow inside and uniformly arranged with a plurality of air outlets on the side facing the scrap frame, one end of the blowing block is connected with a gas nozzle, the gas nozzle communicates with the hollow inside of the blowing block, and the scrap frame is communicated with a material guide pipe.

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