A fin steel strip butt welding machine

Abstract

The application discloses a fin steel strip butt welding machine, which comprises a rack arranged in grounding, a fixed seat and a supporting seat arranged oppositely on the rack, a fixed electrode and a fixed side steel strip pressing mechanism arranged on the top of the fixed seat, a first guide rail group arranged between the fixed seat and the supporting seat, a movable seat slidably arranged on the first guide rail group, a movable electrode and a movable side steel strip pressing mechanism arranged on the top of the movable seat, and a steel strip guide abutting plate arranged at the fixed electrode and the movable electrode respectively; an electrical system is electrically connected with the fixed electrode and the movable electrode, and is used for applying a welding current to heat and melt the butt joint end portions of two fin steel strips; a top position mechanism is in transmission connection with the movable seat, and is used for driving the movable seat to move towards the fixed seat by a preset feeding amount, so that the melted butt joint end portions of the two fin steel strips are extruded to each other and form a dense weld joint; and a weld joint polishing mechanism is used for polishing the upper and lower surfaces of the weld joint. The application has the advantages of good welding quality and high efficiency.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and specifically to a finned steel strip butt welding machine. Background Technology

[0002] Spiral finned tubes are widely used in boilers, heat exchangers, and other heat exchange equipment due to their high heat exchange efficiency and low flow resistance. The main processing method for spiral finned tubes involves shaping finned steel strips (the structure of which is as follows...) Figure 1 (As shown) The finned steel strip is spirally wound and welded to the outer wall of the heat exchange tube. During this process, the end of the finned steel strip coil needs to be butt-welded to the beginning of the next finned steel strip coil to obtain a continuous length of finned steel strip.

[0003] Currently, butt welding of finned steel strips is mostly performed manually using handheld welding torches for spot welding or using ordinary resistance welding machines. Existing welding methods have the following shortcomings: First, the welding quality is unstable: when welding manually, the welding of the finned steel strips depends on the operator's experience, which leads to poor welding consistency and unstable welding quality, affecting the finished product quality of the spiral finned tube.

[0004] Second, the welding efficiency is low: the manual completion of processes such as welding the finned steel strip and grinding the weld surface severely restricts production efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a finned steel strip butt welding machine that can improve the welding quality and efficiency of finned steel strip welding.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a finned steel strip butt welding machine, comprising a frame, an electrical system, a top-positioning mechanism, and a weld grinding mechanism, wherein the frame is grounded, and a fixed seat and a support seat are arranged on the frame in a left-right opposing manner. A fixed electrode is fixedly installed on the top of the fixed base, and a fixed side steel strip pressing mechanism is provided above the fixed electrode. The fixed side steel strip pressing mechanism is used to press one of the finned steel strips onto the fixed electrode. A first guide rail assembly running left and right is connected between the fixed base and the support base. A movable base is slidably arranged on the first guide rail assembly. The movable base is located between the fixed base and the support base. A movable electrode is fixedly installed on the top of the movable base. A movable side steel strip pressing mechanism that moves synchronously with the movable base is arranged above the movable electrode. The movable side steel strip pressing mechanism is used to press another finned steel strip onto the movable electrode. Two sets of steel strip guide plates are respectively set at the fixed electrode and the movable electrode to guide and position the finned steel strips placed on the corresponding electrodes so that the mating ends of the two finned steel strips can be aligned and abutted. The electrical system has two output terminals, which are electrically connected to a movable electrode and a fixed electrode, respectively, so as to apply welding current to the butt joint ends of the two finned steel strips through the fixed electrode and the movable electrode, so as to heat and melt the butt joint ends of the two finned steel strips. The top position mechanism is connected to the movable seat in a transmission manner, and is used to drive the movable seat to move towards the fixed seat by a preset feed amount, so that the melted butt joint ends of the two finned steel strips are pressed against each other and form a dense weld. The weld grinding mechanism is used to grind the upper and lower surfaces of the butt weld of the two finned steel strips.

[0007] Furthermore, in the aforementioned finned steel strip butt welding machine, the structure of the fixed-side steel strip clamping mechanism includes: A fixed side pressure frame is provided, which consists of a first vertical arm fixedly installed on a fixed base and a first horizontal arm extending from the top of the first vertical arm to the top of the fixed electrode. A first threaded hole is provided on the first horizontal arm that passes through the first horizontal arm in a vertical direction. The first pressing block is located between the first cross arm and the fixed electrode, and a first groove is provided on the upper surface of the first pressing block; The first circular connecting block is movably embedded in the first groove of the first pressing block; The first pressure plate is fixedly installed above the first groove. A first through hole is provided on the upper surface of the first pressure plate, which extends into the first groove. The diameter of the first through hole is smaller than the diameter of the first circular connecting block to prevent the first circular connecting block from coming out of the first groove. The diameter of the first through hole is large enough to allow the fixed side clamping screw to pass through. A fixed-side clamping screw is inserted into the first threaded hole of the first cross arm and threadedly connected to the first threaded hole. The upper end of the fixed-side clamping screw extends upward from the first cross arm and is fixed with a first drive handle. The lower end of the fixed-side clamping screw extends downward from the first cross arm, passes through the first through hole, enters the first groove, and is fixedly connected to the first circular connecting block. When the first drive handle drives the fixed-side clamping screw to rotate, the first circular connecting block can drive the first pressure block to move downward toward or upward away from the fixed electrode.

[0008] Furthermore, in the aforementioned finned steel strip butt welding machine, the structure of the movable side steel strip clamping mechanism includes: The movable side pressure frame consists of a second vertical arm fixedly installed on a movable base and a second horizontal arm extending from the top of the second vertical arm directly above the movable electrode. A second threaded hole is provided on the second horizontal arm, which passes through the second horizontal arm in a vertical direction. The second pressure block is located between the second cross arm and the movable electrode, and a second groove is provided on the upper surface of the second pressure block; The second circular connecting block is movably embedded in the second groove of the second pressing block; The second pressure plate is fixedly installed above the second groove. A second through hole is provided on the upper surface of the second pressure plate, which extends into the second groove. The diameter of the second through hole is smaller than the diameter of the second circular connecting block to prevent the second circular connecting block from coming out of the second groove. The diameter of the second through hole is large enough to allow the movable side clamping screw to pass through. The movable side clamping screw passes through the second threaded hole of the second cross arm and is threadedly connected to the second threaded hole. The upper end of the movable side clamping screw extends upward from the second cross arm and is movably connected to the second drive handle. The lower end of the movable side clamping screw passes downward through the second cross arm, extends into the second groove through the second through hole, and is movably connected to the second circular connecting block. When the second drive handle drives the movable side clamping screw to rotate, the second pressure block can be driven to move downward toward or upward away from the movable electrode through the second circular connecting block.

[0009] Furthermore, in the aforementioned finned steel strip butt welding machine, the top positioning mechanism includes a top positioning push cylinder and a limit block; The cylinder body of the top-position propulsion cylinder is fixedly installed on the support base, and the piston rod of the top-position propulsion cylinder is fixedly connected to the movable base; The limiting block is disposed on the end face of the fixed seat facing the movable seat, and is used to limit the movement of the movable seat in the direction of the fixed seat.

[0010] Furthermore, in the aforementioned finned steel strip butt welding machine, the electrical system includes a transformer, the two output terminals of which are electrically connected to the fixed electrode and the movable electrode respectively, for applying welding current to the finned steel strip clamped between the two electrodes.

[0011] Furthermore, in the aforementioned finned steel strip butt welding machine, the weld grinding mechanism comprises: a support fixed to the frame; a second guide rail assembly arranged in a front-to-back direction on the support; a slide block slidably arranged on the second guide rail assembly; the slide block being driven by a front-to-back translational drive for driving its front-to-back movement; a third guide rail assembly arranged in a vertical direction on the slide block; two lifting seats slidably arranged on the third guide rail assembly; each lifting seat being driven by a lifting drive for adjusting its height; a reduction motor arranged on each lifting seat; a rotating shaft coaxially connected to the output shaft of each reduction motor; a grinding head coaxially fixedly mounted on the outer end of each rotating shaft; and two grinding heads arranged opposite each other vertically for grinding the upper and lower surfaces of the butt weld of the finned steel strip from the upper and lower sides respectively.

[0012] Furthermore, in the aforementioned finned steel strip butt welding machine, a steel strip shearing mechanism is also provided on the frame. The structure of the steel strip shearing mechanism includes: a blade holder, a blade, a handle, a torsion spring, and a connecting plate. One end of the blade along its length is hinged to the blade holder by a first pin, the other end of the blade along its length is hinged to one end of the connecting plate by a second pin, the other end of the connecting plate is hinged to the lower middle part of the handle by a third pin, and the lower end of the handle is hinged to the blade holder by a fourth pin. One end of the torsion spring is connected to the blade holder, and the other end of the torsion spring is connected to the connecting plate, which is used to drive the blade to return to its original position when the external force is removed. A shearing clearance groove for the blade to cut into is provided on the upper surface of the blade holder; A steel strip positioning plate is provided on the feed side of the tool holder.

[0013] The beneficial effects of implementing the above technical solution are as follows: (1) Two finned steel strips are clamped by fixed electrodes and movable electrodes respectively, and the butt welding of the finned steel strips is completed with the help of the top position mechanism. The welding process does not require manual intervention, which ensures the consistency and stability of the weld quality. At the same time, the integrated weld grinding mechanism can grind the upper and lower surfaces of the weld after welding, without the need for manual grinding, which greatly improves production efficiency.

[0014] (2) The top position mechanism adopts a structure of top position propulsion cylinder and limit block. The top position feed amount is precisely controlled by the distance between the limit block and the movable seat, which ensures the stability and consistency of the extrusion pressure in the top position stage of flash welding.

[0015] (3) The steel strip shearing mechanism can cut the ends of the finned steel strip before welding, eliminating the impact of uneven ends on welding quality, ensuring the flatness of the butt joint surface, and thus improving welding quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the finned steel strip.

[0017] Figure 2 This is a schematic diagram of the structure of a finned steel strip butt welding machine according to the present invention.

[0018] Figure 3 for Figure 2 A magnified view of a portion of the image.

[0019] Figure 4 for Figure 2 A schematic diagram of the structure viewed from the right.

[0020] Figure 5This is a schematic diagram of the weld grinding mechanism.

[0021] Figure 6 for Figure 2 A schematic diagram showing the positional relationship of the fixed seat, movable seat, support seat, limit block, and top cylinder as shown in a top-down view. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] For ease of description, let's use Figure 2 The left-hand direction is defined as "left". Figure 2 The right-hand direction is defined as "right". Figure 2 "Above" is defined as "above". Figure 2 The term "down" is defined as "below" and a coordinate system is established based on it to determine the directions "left", "right", "front", "back", "up" and "down". All directional terms in the invention involving the directions "front", "back", "left", "right", "up" and "down" are defined based on this direction.

[0024] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the finned steel strip butt welding machine includes a frame 1, an electrical system, a top-positioning mechanism, and a weld grinding mechanism. The frame 1 is grounded, and a fixed seat 2 and a support seat 3 arranged opposite each other on the frame 1 are provided. A fixed electrode 4 is fixedly installed on the top of the fixed base 2, and a fixed side steel strip pressing mechanism is provided above the fixed electrode 4. The fixed side steel strip pressing mechanism is used to press one of the finned steel strips 100 onto the fixed electrode 4.

[0025] In this example, such as Figure 3 As shown, the structure of the fixed-side steel strip clamping mechanism includes: The fixed side pressure frame consists of a first vertical arm 51 fixedly installed on the fixed base 2 and a first horizontal arm 52 extending from the top of the first vertical arm 51 directly above the fixed electrode 4. A first threaded hole is provided on the first horizontal arm 52 in a vertical direction. The first pressing block 53 is located between the first cross arm 52 and the fixed electrode 4, and a first groove is provided on the upper surface of the first pressing block 53. The first circular connecting block 57 is movably embedded in the first groove of the first pressing block 53; The first pressure plate 55 is fixedly installed above the first groove. A first through hole is provided on the upper surface of the first pressure plate 55, which extends into the first groove. The diameter of the first through hole is smaller than the diameter of the first circular connecting block 57 to prevent the first circular connecting block 57 from coming out of the first groove. The diameter of the first through hole is large enough to allow the fixed side clamping screw 56 to pass through. A fixed-side clamping screw 56 is inserted into the first threaded hole of the first cross arm 52 and threadedly connected to the first threaded hole. The upper end of the fixed-side clamping screw 56 extends upward from the first cross arm 52 and is fixed with a first drive handle 58. The lower end of the fixed-side clamping screw 56 extends downward from the first cross arm 52, passes through the first through hole, enters the first groove, and is fixedly connected to the first circular connecting block 57. When the first drive handle 58 drives the fixed-side clamping screw 56 to rotate, the first circular connecting block 57 can drive the first pressure block 53 to move downward toward or upward away from the fixed electrode 4.

[0026] A first guide rail group 6 running left and right is connected between the fixed base 2 and the support base 3. The first guide rail group 6 is composed of several first guide rails. A movable base 7 is slidably arranged on the first guide rail group 6. The movable base 7 is located between the fixed base 2 and the support base 3. A movable electrode 8 is fixedly installed on the top of the movable base 7. A movable side steel strip pressing mechanism that moves synchronously with the movable base 7 is arranged above the movable electrode 8. The movable side steel strip pressing mechanism is used to press another finned steel strip 100 onto the movable electrode 8.

[0027] In this embodiment, the side of the first pressure block 53 is a first vertical plane, and the side of the first vertical arm 51 facing the first pressure block 53 is a first sidewall adapted to the first vertical plane. The first vertical plane is in contact with the first sidewall. When the first drive handle 58 drives the fixed side clamping screw 56 to rotate to drive the first pressure block 53 to rise and fall, the first pressure block 53 slides up and down along the first sidewall of the first vertical arm 51 through the first vertical plane. The first pressure block 53 is limited by the surface cooperation between the first vertical plane and the first sidewall, so as to prevent the first pressure block 53 from rotating synchronously with the fixed side clamping screw 56.

[0028] In this embodiment, as Figure 3 As shown, the structure of the movable side steel strip clamping mechanism includes: The movable side pressure frame consists of a second vertical arm 102 fixedly installed on the movable seat 7 and a second horizontal arm 103 extending from the top of the second vertical arm 102 directly above the movable electrode 8. A second threaded hole is provided on the second horizontal arm 103 in a vertical direction. The second pressing block 104 is located between the second cross arm 103 and the movable electrode 8, and a second groove is provided on the upper surface of the second pressing block 104. The second circular connecting block 108 is movably embedded in the second groove of the second pressing block 104; The second pressure plate 106 is fixedly installed above the second groove. A second through hole is provided on the upper surface of the second pressure plate 106, which extends into the second groove. The diameter of the second through hole is smaller than the diameter of the second circular connecting block 108 to prevent the second circular connecting block 108 from coming out of the second groove. The diameter of the second through hole is large enough to allow the movable side clamping screw 107 to pass through. The movable side clamping screw 107 passes through the second threaded hole of the second cross arm 103 and is threadedly connected to the second threaded hole. The upper end of the movable side clamping screw 107 extends upward from the second cross arm 103 and is movably connected to the second drive handle 109. The lower end of the movable side clamping screw 107 passes downward through the second cross arm, extends into the second groove through the second through hole, and is movably connected to the second circular connecting block 108. When the second drive handle 109 drives the movable side clamping screw 107 to rotate, the second circular connecting block 108 can drive the second pressure block 104 to move downward toward or upward away from the movable electrode 8.

[0029] In this embodiment, the side of the second pressure block 104 is a second vertical plane, and the side of the second vertical arm 102 facing the second pressure block 104 is a second sidewall adapted to the second vertical plane. The second vertical plane fits against the second sidewall. When the second drive handle 109 drives the movable side clamping screw 107 to rotate to drive the second pressure block 104 to rise and fall, the second pressure block 104 slides up and down along the second sidewall through the second vertical platform. The second pressure block 104 is limited by the surface-to-surface cooperation between the second vertical plane and the second sidewall to prevent the second pressure block 104 from rotating synchronously with the movable side clamping screw 107.

[0030] Two sets of steel strip guide plates 11 are respectively set at the fixed electrode 4 and the movable electrode 8, and are used to guide and position the finned steel strips 100 placed on the corresponding electrodes so that the mating ends of the two finned steel strips 100 can be aligned and abutted. The electrical system has two output terminals, which are electrically connected to a movable electrode 8 and a fixed electrode 4, respectively. These terminals apply welding current to the mating ends of the two finned steel strips 100 via the fixed electrode 4 and the movable electrode 8, causing the mating ends of the two finned steel strips 100 to heat and melt. In this embodiment, the electrical system includes a transformer, whose two output terminals are electrically connected to the fixed electrode 4 and the movable electrode 8, respectively, for applying welding current to the finned steel strip 100 sandwiched between the two electrodes.

[0031] The top position mechanism is connected to the movable seat 7 for driving the movable seat 7 to move towards the fixed seat 2 by a preset feed amount, so that the melted butt joint ends of the two finned steel strips 100 are pressed against each other and form a dense weld.

[0032] In this embodiment, as Figure 6 As shown, the top positioning mechanism includes a top positioning push cylinder 121 and a limit block 122; The cylinder body of the top-position propulsion cylinder 121 is fixedly installed on the support base 3, and the piston rod of the top-position propulsion cylinder 121 is fixedly connected to the movable base 7. The limiting block 122 is disposed on the end face of the fixed seat 2 facing the movable seat 7, and is used to limit the movement of the movable seat 7 in the direction of the fixed seat 2; The distance h between the limiting block 122 and the movable seat 7 is the preset feed amount for the top position operation. During the process of the top position push cylinder 121 moving the movable seat 7 to abut against the limiting block 122, the melted butt joint ends of the two finned steel strips are squeezed against each other and form a dense weld.

[0033] The weld grinding mechanism is used to grind the upper and lower surfaces of the butt weld of the two finned steel strips; in this embodiment, as... Figure 5 As shown, the structure of the weld grinding mechanism includes: a bracket 13 fixed to the frame 1; a second guide rail group 14 arranged on the bracket 13, the second guide rail group 14 being composed of several second guide rails; a slide block 15 slidably arranged on the second guide rail group 14; the slide block 15 being connected to a forward and backward translational drive component 31 for driving its forward and backward movement; in this embodiment, the forward and backward translational drive component 31 is a translational drive cylinder, the cylinder body of the translational drive cylinder being fixed to the bracket 13, and the piston rod of the translational drive cylinder being fixedly connected to the slide block 15; the slide block A vertically oriented third guide rail group 16 is provided on the slide 15. Two lifting seats 17 are slidably arranged on the third guide rail group 16. Each lifting seat 17 is connected to a lifting drive component 18 for adjusting its height. A reduction motor 19 is provided on each lifting seat 17. The output shaft of each reduction motor 19 is coaxially connected to a rotating shaft 20. A grinding head 21 is coaxially fixedly mounted on the outer end of each rotating shaft 20. The two grinding heads 21 are arranged vertically opposite each other and are used to grind the upper and lower surfaces of the butt weld of the finned steel strip 100 from the upper and lower sides respectively. In this embodiment, the lifting drive component corresponding to each lifting seat 17 is a lifting cylinder. The cylinder body of the lifting cylinder is fixed to the slide 15. The piston rod of the lifting cylinder is fixedly connected to the corresponding lifting seat 17. The extension and retraction of the piston rod of the lifting cylinder drives the corresponding lifting seat 17 to rise or fall, thereby synchronously driving the corresponding grinding head 21 to move closer to or away from the other grinding head 21.

[0034] A steel strip shearing mechanism is also provided on the frame 1. The structure of the steel strip shearing mechanism includes: a blade holder 22, a blade 23, a handle 24, a torsion spring 25, and a connecting plate 26. One end of the blade 23 along its length is hinged to the tool holder 22 via a first pin 27, and the other end of the blade 23 along its length is hinged to one end of the connecting plate 26 via a second pin 28. The other end of the connecting plate 26 is hinged to the lower middle part of the handle 24 via a third pin 29. The lower end of the handle 24 is hinged to the tool holder 22 via a fourth pin 30. One end of the torsion spring 25 is connected to the blade holder 22, and the other end of the torsion spring 25 is connected to the connecting plate 26, which is used to drive the blade 23 to return to its original position when the external force is removed. A shearing clearance groove for the blade 23 to cut into is provided on the upper surface of the blade holder 22; A steel strip positioning plate 32 is provided on the feed side of the tool holder 22.

[0035] In practical applications, a positioning mark 123 is also provided on the frame 1 between the fixed seat 2 and the movable seat 7. Before welding, after the worker places the two finned steel strips 100 on the fixed electrode 4 and the movable electrode 8 respectively, the docking ends of the two finned steel strips 100 can be aligned with the positioning mark 123. Then, the fixed side steel strip pressing mechanism and the movable side steel strip pressing mechanism press the corresponding finned steel strips 100 on the fixed electrode 4 and the movable electrode 8 respectively, thereby positioning the initial position of the docking ends of the two finned steel strips.

[0036] The working principle of this invention is as follows: Before welding, the finned steel strip 100 to be welded is first fed into the space between the blade 23 and the blade holder 22 along the steel strip positioning plate 32. The steel strip positioning plate 32 provides lateral guidance for the feeding of the finned steel strip 100 to ensure that the finned steel strip 100 is perpendicular to the cutting edge direction of the blade 23 during shearing. Then, the handle 24 is pressed down, and the handle 24 drives the blade 23 to rotate downward around the first pin 27 through the connecting plate 26 to cut into the shearing clearance groove, cutting off the end of the finned steel strip 100 to obtain a neat butt joint surface. After releasing the handle 24, the torsion spring 25 drives the blade 23 to return to its original position through the connecting plate 26. The butt joint ends of the two finned steel strips 100 to be welded are sheared in the above manner.

[0037] Next, the two finned steel strips 100 with their ends already cut flat are fed to the fixed electrode 4 and the movable electrode 8 respectively along the corresponding steel strip guide plates 11. The steel strip guide plates 11 provide lateral guidance for the feeding of the finned steel strips 100. After the mating end faces of the two finned steel strips 100 come into contact with each other, the left and right positions of the two finned steel strips 100 are finely adjusted so that the mating point of the two finned steel strips 100 is aligned with the reference mark 123.

[0038] Subsequently, rotating the first drive handle 58 drives the fixed-side clamping screw 56 to rotate, which in turn drives the first pressure block 53 to move downward through the first circular connecting block 57, pressing one of the finned steel strips 100 onto the fixed electrode 4; similarly, rotating the second drive handle 109 drives the movable-side clamping screw 107 to rotate, which in turn drives the second pressure block 104 to move downward through the second circular connecting block 108, pressing the other finned steel strip 100 onto the movable electrode 8.

[0039] After the pressing is completed, the transformer in the electrical system applies welding current to the two finned steel strips 100 through the fixed electrode 4 and the movable electrode 8. Since the mating end faces of the two finned steel strips 100 are in contact with each other and the current density at the contact point is extremely high, a high temperature is generated instantly, causing the metal at the contact point to melt and explode, forming a continuous spark flash phenomenon. The oxide scale and impurities on the mating end face are splashed out with the molten droplets and discharged. At the same time, the mating ends of the two finned steel strips 100 are continuously heated. After the butt joint ends of the two finned steel strips 100 are heated and melted, the top-positioning propulsion cylinder 121 quickly drives the movable seat 7 to move towards the fixed seat 2 until it abuts against the limiting block 122. Using the distance h between the limiting block 122 and the movable seat 7 as the preset top-positioning feed amount, a top-positioning force is applied to the melted butt joint ends of the two finned steel strips 100, so that the liquid metal and residual impurities are squeezed out of the joint. The pressure is maintained for a period of time, so that the joint cools and solidifies under pressure, forming a dense butt weld.

[0040] After welding is completed, the second drive handle 109 is rotated to drive the movable side clamping screw 107 to rotate, which drives the second pressure block 104 to move upward through the second circular connecting block 108, so as to loosen the finned steel strip 100 on the movable electrode 8; the top position push cylinder 121 drives the movable seat 7 to move backward a distance away from the fixed seat 2, so as to leave working space on both sides of the weld for the two grinding heads 21 to extend into. Then, the second drive handle 109 is rotated again to drive the movable side clamping screw 107 to rotate, which drives the second pressure block 104 to move downward through the second circular connecting block 108, so as to press the finned steel strip 100 back onto the movable electrode 8.

[0041] Next, the translation drive cylinder drives the slide block 15 to move forward along the second guide rail assembly 14, causing the two grinding heads 21 to extend into the working space, positioning them on the upper and lower sides of the finned steel strip weld seam, respectively. Since the length of the grinding heads 21 is much greater than the width of the finned steel strip 100, when the two grinding heads 21 move to the upper and lower sides of the weld seam, their length is sufficient to completely cover the weld seam width. Therefore, precise positioning of the extension amount of the translation drive cylinder is not required to ensure the grinding effect.

[0042] Subsequently, the two lifting cylinders drive the corresponding lifting seats 17 to move towards each other along the third guide rail group 16, so that the two grinding heads 21 clamp the weld surface from the upper and lower sides respectively; then the two reduction motors 19 drive the grinding heads 21 to rotate through the corresponding rotating shafts 20, and grind the upper and lower surfaces of the weld at the same time, thereby removing the weld beads and burrs on the upper and lower surfaces of the weld.

[0043] After grinding is completed, the two lifting cylinders drive the corresponding lifting seats 17 to move in the opposite direction along the third guide rail group 16, so that the two grinding heads 21 are separated from the weld surface; the translation drive cylinder drives the slide 15 to move backward along the second guide rail group 14 to reset, and the two grinding heads 21 exit the working space.

[0044] Finally, rotate the second drive handle 109 to drive the movable side clamping screw 107 to rotate, which in turn drives the second pressure block 104 to move upward through the second circular connecting block 108, thereby loosening the finned steel strip 100 on the movable electrode 8; at the same time, rotate the first drive handle 58 to drive the fixed side clamping screw 56 to rotate, which in turn drives the first pressure block 53 to move upward through the first circular connecting block 57, thereby loosening the finned steel strip 100 on the fixed electrode 4. At this point, the welded and polished finned steel strip 100 can be removed.

[0045] Throughout the welding and grinding process, frame 1 is always reliably grounded through the grounding system. When the equipment leaks current or malfunctions, the fault current can be conducted to the ground through the grounding path, effectively avoiding the risk of electric shock to operators and ensuring the safe operation of the equipment.

[0046] The advantages of this invention are: (1) Two finned steel strips are clamped by fixed electrodes and movable electrodes respectively, and the butt welding of the finned steel strips is completed with the help of the top position mechanism. The welding process does not require manual intervention, which ensures the consistency and stability of the weld quality. At the same time, the integrated weld grinding mechanism can grind the upper and lower surfaces of the weld after welding, without the need for manual grinding, which greatly improves production efficiency.

[0047] (2) The top position mechanism adopts a structure of top position propulsion cylinder and limit block. The top position feed amount is precisely controlled by the distance between the limit block and the movable seat, which ensures the stability and consistency of the extrusion pressure in the top position stage of flash welding.

[0048] (3) The steel strip shearing mechanism can cut the ends of the finned steel strip before welding, eliminating the impact of uneven ends on welding quality, ensuring the flatness of the butt joint surface, and thus improving welding quality.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any modifications or equivalent changes made based on the technical essence of the present invention shall still fall within the scope of protection claimed by the present invention.

Claims

1. A finned steel strip butt welding machine, characterized in that: It includes a frame, an electrical system, a top-mounting mechanism, and a weld grinding mechanism. The frame is grounded, and fixed seats and support seats are arranged opposite each other on the frame. A fixed electrode is fixedly installed on the top of the fixed base, and a fixed side steel strip pressing mechanism is provided above the fixed electrode. The fixed side steel strip pressing mechanism is used to press one of the finned steel strips onto the fixed electrode. A first guide rail assembly running left and right is connected between the fixed base and the support base. A movable base is slidably arranged on the first guide rail assembly. The movable base is located between the fixed base and the support base. A movable electrode is fixedly installed on the top of the movable base. A movable side steel strip pressing mechanism that moves synchronously with the movable base is arranged above the movable electrode. The movable side steel strip pressing mechanism is used to press another finned steel strip onto the movable electrode. Two sets of steel strip guide plates are respectively set at the fixed electrode and the movable electrode to guide and position the finned steel strips placed on the corresponding electrodes so that the mating ends of the two finned steel strips can be aligned and abutted. The electrical system has two output terminals, which are electrically connected to a movable electrode and a fixed electrode, respectively, so as to apply welding current to the butt joint ends of the two finned steel strips through the fixed electrode and the movable electrode, so as to heat and melt the butt joint ends of the two finned steel strips. The top position mechanism is connected to the movable seat in a transmission manner, and is used to drive the movable seat to move towards the fixed seat by a preset feed amount, so that the melted butt joint ends of the two finned steel strips are pressed against each other and form a dense weld. The weld grinding mechanism is used to grind the upper and lower surfaces of the butt weld of the two finned steel strips.

2. The finned steel strip butt welding machine according to claim 1, characterized in that: The structure of the fixed-side steel strip clamping mechanism includes: A fixed side pressure frame is provided, which consists of a first vertical arm fixedly installed on a fixed base and a first horizontal arm extending from the top of the first vertical arm to the top of the fixed electrode. A first threaded hole is provided on the first horizontal arm that passes through the first horizontal arm in a vertical direction. The first pressing block is located between the first cross arm and the fixed electrode, and a first groove is provided on the upper surface of the first pressing block; The first circular connecting block is movably embedded in the first groove of the first pressing block; The first pressure plate is fixedly installed above the first groove. A first through hole is provided on the upper surface of the first pressure plate, which extends into the first groove. The diameter of the first through hole is smaller than the diameter of the first circular connecting block to prevent the first circular connecting block from coming out of the first groove. The diameter of the first through hole is large enough to allow the fixed side clamping screw to pass through. A fixed-side clamping screw is inserted into the first threaded hole of the first cross arm and threadedly connected to the first threaded hole. The upper end of the fixed-side clamping screw extends upward from the first cross arm and is fixed with a first drive handle. The lower end of the fixed-side clamping screw extends downward from the first cross arm, passes through the first through hole, enters the first groove, and is fixedly connected to the first circular connecting block. When the first drive handle drives the fixed-side clamping screw to rotate, the first pressure block can be driven downward toward or upward away from the fixed electrode through the first circular connecting block.

3. The finned steel strip butt welding machine according to claim 1, characterized in that: The structure of the movable side steel strip clamping mechanism includes: The movable side pressure frame consists of a second vertical arm fixedly installed on a movable base and a second horizontal arm extending from the top of the second vertical arm directly above the movable electrode. A second threaded hole is provided on the second horizontal arm, which passes through the second horizontal arm in a vertical direction. The second pressure block is located between the second cross arm and the movable electrode, and a second groove is provided on the upper surface of the second pressure block; The second circular connecting block is movably embedded in the second groove of the second pressing block; The second pressure plate is fixedly installed above the second groove. A second through hole is provided on the upper surface of the second pressure plate, which extends into the second groove. The diameter of the second through hole is smaller than the diameter of the second circular connecting block to prevent the second circular connecting block from coming out of the second groove. The diameter of the second through hole is large enough to allow the movable side clamping screw to pass through. The movable side clamping screw passes through the second threaded hole of the second cross arm and is threadedly connected to the second threaded hole. The upper end of the movable side clamping screw extends upward from the second cross arm and is movably connected to the second drive handle. The lower end of the movable side clamping screw passes downward through the second cross arm, extends into the second groove through the second through hole, and is movably connected to the second circular connecting block. When the second drive handle drives the movable side clamping screw to rotate, the second pressure block can be driven to move downward toward or upward away from the movable electrode through the second circular connecting block.

4. The finned steel strip butt welding machine according to claim 1, characterized in that: The top positioning mechanism includes a top positioning thrust cylinder and a limit block; The cylinder body of the top-position propulsion cylinder is fixedly installed on the support base, and the piston rod of the top-position propulsion cylinder is fixedly connected to the movable base; The limiting block is disposed on the end face of the fixed seat facing the movable seat, and is used to limit the movement of the movable seat in the direction of the fixed seat.

5. The finned steel strip butt welding machine according to claim 1, characterized in that: The electrical system includes a transformer, the two output terminals of which are electrically connected to the fixed electrode and the movable electrode, respectively, for applying welding current to the finned steel strip held between the two electrodes.

6. The finned steel strip butt welding machine according to claim 1, characterized in that: The weld grinding mechanism includes: a support fixed to the frame; a second guide rail assembly with a front-to-back orientation on the support; a slide block slidably mounted on the second guide rail assembly; the slide block being driven by a front-to-back translational drive for driving its front-to-back movement; a third guide rail assembly with a vertical orientation on the slide block; two lifting seats slidably mounted on the third guide rail assembly; each lifting seat being driven by a lifting drive for adjusting its height; a reduction motor mounted on each lifting seat; a rotating shaft coaxially connected to the output shaft of each reduction motor; a grinding head coaxially fixedly mounted on the outer end of each rotating shaft; and two grinding heads arranged opposite each other, used to grind the upper and lower surfaces of the butt weld of the finned steel strip from the upper and lower sides respectively.

7. The finned steel strip butt welding machine according to claim 1, characterized in that: A steel strip shearing mechanism is also provided on the frame. The structure of the steel strip shearing mechanism includes: a blade holder, a blade, a handle, a torsion spring, and a connecting plate. One end of the blade along its length is hinged to the blade holder by a first pin, the other end of the blade along its length is hinged to one end of the connecting plate by a second pin, the other end of the connecting plate is hinged to the lower middle part of the handle by a third pin, and the lower end of the handle is hinged to the blade holder by a fourth pin. One end of the torsion spring is connected to the blade holder, and the other end of the torsion spring is connected to the connecting plate, which is used to drive the blade to return to its original position when the external force is removed. A shearing clearance groove for the blade to cut into is provided on the upper surface of the blade holder, and a steel strip positioning plate is provided on the feed side of the blade holder.

Images