A window corner weld grinding device

Abstract

The present invention relates to the technical field of weld grinding, and discloses a window corner weld grinding device, comprising a window frame; two grinding devices for grinding the welded portion of the window frame; an expansion mechanism for controlling the relative outward movement of the two grinding devices to position the window frame while also performing lateral displacement; and a pressure plate is provided between the two grinding devices. The window corner weld grinding device, through the cooperation between the expansion mechanism and the grinding device, enables the operator to directly control the two grinding devices to move to the weld of the window corner when pressing the entire device, and the gravity support of the entire device is carried on the window frame, without the operator having to manually hold it, making the grinding process more labor-saving, and when close to the vertical surface of the window frame, the two side grinding discs on the side can also be controlled to grind the weld in the flat position, thereby improving the overall grinding efficiency and making the operator's grinding process more simple, efficient, and labor-saving.

Description

Technical Field

[0001] The invention relates to the technical field of weld grinding, in particular to a window corner weld grinding device. Background Art

[0002] Aluminum alloy is the most widely used type of non-ferrous metal structural material in industry. It has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industries. With the rapid development of industrial economy, the demand for aluminum alloy welded structural parts is increasing. Aluminum alloy doors and windows refer to doors and windows made of aluminum alloy extruded profiles as frames, stiles and sashes. They are called aluminum alloy doors and windows, or aluminum doors and windows for short. Aluminum alloy doors and windows are made of aluminum alloy profiles through cutting and welding.

[0003] However, general aluminum alloy window frames will have a certain degree of welds when they are welded. During production, they need to be polished and then painted. In the existing technology, angle grinders are basically used for polishing. This polishing method is not easy to operate for window corners. The operator needs to hold the angle grinder and perform horizontal movement polishing on the window corners. In this method, the operator has to control the horizontal movement while bearing the weight of the angle grinder, which will cause unstable handholding. In addition, the operator polishes one side separately. This method will undoubtedly affect the polishing and requires too much experience from the operator. Therefore, a window corner weld polishing device is proposed to solve the above problems. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In response to the shortcomings of the existing technology, the present invention provides a window corner weld grinding device, which solves the problems in the existing technology that the window corner grinding method in the window frame is too simple, the operator is time-consuming and labor-intensive during the grinding operation, and the grinding efficiency is low.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a window corner weld grinding device, comprising a window frame; two grinding devices for grinding the welded portion of the window frame; an expansion mechanism for controlling the relative outward movement of the two grinding devices to position the window frame while also being able to perform lateral displacement; a pressure plate is provided between the two grinding devices, and the expansion mechanism comprises a rolling device, a moving device, a top pressing device and a lateral moving device; the rolling device is used to slide on the inner side surface of the window frame, the moving device is used to control the two grinding devices to expand and move them to the weld of the window corner, the lateral moving device is used to control the lateral movement of the grinding device, and the top pressing device is used to support and position the window frame.

[0008] Preferably, the rolling device includes a limiting rod, the bottom of the limiting rod is connected to a roller through an axial rod, a rolling ring is provided on the roller, and the rolling ring slides in the inner wall groove of the window frame, the limiting rod is connected to a transverse rod, and the limiting rod is slidably connected to the pressure plate.

[0009] Preferably, the moving device includes a flat plate, an oblique groove is provided on the flat plate, a sliding column is slidably connected in the oblique groove, the sliding column is connected to the pressure plate through a connecting piece, a transverse groove is provided on the flat plate, the transverse rod is slidably connected inside the transverse groove, the two grinding devices are respectively arranged on two flat plates, the bottom of the pressure plate is slidably connected to a T-block through a T-slot, the bottom of the T-block is connected to a guide rod, the guide rod is slidably connected to the inside of the flat plate, and a reset spring is sleeved on the surface of the guide rod.

[0010] Preferably, the pressing device includes a push rod, one end of which is connected to a contact slide, the other end of which is slidably connected to the inside of the flat plate, a positioning spring is provided inside the flat plate, and the left end of the positioning spring is connected to the right end of the push rod.

[0011] Preferably, the transverse shifting device includes a handle, which is rotatably connected to the pressure plate through a connecting piece, and both ends of the handle are connected to rolling gears, and the surface of the rolling gear is engaged with a transverse shifting tooth plate, and the transverse shifting tooth plate is fixed on the flat plate.

[0012] Preferably, the grinding device includes a driving motor, which is fixed to the flat plate via a connecting plate. The output end of the driving motor is fixedly connected to a driving shaft, and the bottom of the driving shaft is connected to a grinding wheel.

[0013] Preferably, the surface of the driving shaft is fixedly connected to the first gear, the surface of the first gear is meshed with the second gear, the side of the second gear is fixedly connected to the card shaft, the card shaft is slidably connected to pulley 1 through a key groove, the surface of pulley 1 is connected to pulley 2 through a toothed belt transmission, the interior of pulley 2 is connected to a side grinding plate through an axle rod, the side of pulley 2 is rotatably connected to a bracket, the bottom of the bracket is slidably connected to the card shaft through a key groove, the card shaft is rotatably connected to a connecting frame, and the right end of the connecting frame is connected to the transverse rod.

[0014] Preferably, a compression spring is sleeved on the surface of the clamping shaft, one end of the compression spring abuts against the side surface of the pulley, and the other end of the compression spring is connected to the end surface of the clamping shaft.

[0015] Preferably, the bottom of the first gear is rotatably connected to the bottom plate, and a rotating yielding device is provided on the bottom plate. The rotating yielding device includes a gear rack, and the gear rack is slidably connected to the bottom plate. A resistance rack is connected to the gear rack, and the side of the resistance rack is located inside the bottom plate and is connected to a compression spring. A large gear is meshed with the surface of the gear rack, and the large gear is fixedly connected to the bracket.

[0016] (3) Beneficial effects

[0017] Compared with the prior art, the present invention provides a window corner weld grinding device with the following beneficial effects:

[0018] 1. The window corner weld grinding equipment, through the mutual cooperation of the expansion mechanism and the grinding device, allows the operator to directly control the two grinding devices to move horizontally when pressing the entire device, and move the grinding wheel to the weld at the window corner. The gravity support of the entire device is carried on the window frame, and there is no need for the operator to manually hold it, making the grinding process more labor-saving. When approaching the vertical surface of the window frame, the rotary yielding device is used to rotate to control the two side grinding discs on the side to grind the welds in the flat position, thereby improving the overall grinding efficiency and making the operator's grinding process simpler, more efficient and labor-saving.

[0019] 2. The window corner weld grinding equipment uses a rolling device to slide the roller on the slot on the window frame where the glass should be installed, so as to bear the weight of the entire equipment without the operator's hands bearing the weight. The bottom surface of the roller is flush with the lower plane of the grinding wheel, which can also prevent the grinding wheel from over-grinding the window frame.

[0020] 3. The window corner weld grinding equipment can first position the entire window frame through the top pressure device, and then fix the grinding equipment. It can also provide a certain degree of thrust on the vertical surface of the window frame, and then detect the welding quality of the window frame to avoid the situation where the weld foot position is difficult to check after the grinding is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a window corner weld grinding device proposed by the present invention;

[0022] Figure 2 This is a schematic diagram of the expansion mechanism of a window fillet weld grinding device proposed by the present invention;

[0023] Figure 3 This is a schematic diagram of the flat plate structure of a window corner weld grinding device proposed by the present invention;

[0024] Figure 4 This is a schematic structural diagram of a transverse movement device for window fillet weld grinding equipment proposed by the present invention;

[0025] Figure 5 This is a schematic structural diagram of a grinding device for window fillet weld grinding equipment proposed by the present invention;

[0026] Figure 6 This is a schematic diagram of the position connection of two brackets of a window corner weld grinding device proposed by the present invention;

[0027] Figure 7 This is a structural schematic diagram of a rotary yielding device for window corner weld grinding equipment proposed by the present invention.

[0028] In the figure: 1, window frame; 2, pressure plate; 3, expansion mechanism; 301, flat plate; 302, handle; 303, guide rod; 304, return spring; 305, sliding column; 306, T-block; 307, push rod; 308, contact slide; 309, positioning spring; 310, inclined groove; 311, transverse groove; 312, transverse rod; 313, limit rod; 314, roller; 315, rolling gear; 316, transverse gear plate; 4, opening Grinding device; 401, driving motor; 402, driving shaft; 403, grinding wheel; 404, first gear; 405, second gear; 406, pulley one; 407, pulley two; 408, side grinding disc; 409, clamping shaft; 410, extrusion spring; 411, connecting frame; 412, rotary yielding device; 4121, interference frame; 4122, gear frame; 4123, compression spring; 4124, large gear; 413, bracket. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figure 1-7 A window corner weld grinding device includes a window frame 1; two grinding devices 4, used to grind the welded part of the window frame 1; an expansion mechanism 3, used to control the two grinding devices 4 to move relative to each other outward to position the window frame 1 while also being able to move laterally; a pressure plate 2 is provided between the two grinding devices 4, and the expansion mechanism 3 includes a rolling device, a moving device, a top pressing device and a transverse moving device; the rolling device is used to slide on the inner side of the window frame 1, the moving device is used to control the two grinding devices 4 to expand and move them to the weld of the window corner, the transverse moving device is used to control the transverse movement of the grinding device 4, and the top pressing device is used to support and position the window frame 1 outward.

[0031] In this embodiment, the rolling device includes a limit rod 313, the bottom of which is rotatably connected to a roller 314 via an axle, a rolling ring being provided on the roller 314, which slides in a groove on the inner wall of the window frame 1, a transverse rod 312 being connected to the limit rod 313, and the limit rod 313 being slidably connected to the pressure plate 2. The moving device includes a flat plate 301, an inclined groove 310 being provided on the flat plate 301, a sliding column 305 being slidably connected in the inclined groove 310, the sliding column 305 being connected to the pressure plate 2 via a connecting piece, a transverse groove 311 being provided on the flat plate 301, and a transverse rod 312 being slidably connected in the interior of the transverse groove 311, two grinding devices 4 being respectively provided on the two flat plates 301, the rolling ring of the roller 314 being clamped in the glass mounting groove on the inner side of the window frame 1, and then the window frame 1 being fixed by an external fixing fixture, and the operator's other hand holding the handle 302 to control The downward movement of the pressing plate 2 will drive the sliding column 305 to slide in the inclined groove 310, and then drive the flat plate 301 to move outward. Through the symmetrical structure, the two flat plates 301 will expand outward synchronously at this time, thereby controlling the two rollers 314 at the bottom to roll on the inner side of the window frame 1. Therefore, the overall groove is used to limit the internal two-way rolling, without the operator's naked eye alignment, and the gravity of the entire grinding equipment is directly borne by the window frame 1, without the operator holding it in the air, which is more labor-saving and simple.

[0032] Furthermore, the bottom of the pressure plate 2 is slidably connected to a T-block 306 through a T-slot, the bottom of the T-block 306 is connected to a guide rod 303, the guide rod 303 is slidably connected to the inside of the flat plate 301, and a return spring 304 is sleeved on the surface of the guide rod 303.

[0033] Furthermore, the pressing device includes a push rod 307, one end of which is connected to a contact slide 308, and the other end of which is slidably connected to the inside of the flat plate 301. A positioning spring 309 is provided inside the flat plate 301, and the left end of the positioning spring 309 is connected to the right end of the push rod 307. When the two flat plates 301 are forced to expand and slide outward, the contact slide 308 on the push rod 307 is driven to abut against the inner side surface of the window frame 1, supporting the window frame 1. The elastic force of the positioning spring 309 is used to squeeze and apply a certain degree of thrust to the window frame 1. If the welding position of the window frame 1 becomes desoldered during the stress process, it indicates that there is a hidden danger in the welding of the window frame 1, such as desoldering or cold welding, and re-soldering is required. Therefore, it can also play a certain role in detection.

[0034] In addition, the transverse movement device includes a handle 302, which is rotatably connected to the pressure plate 2 via a connecting member. Rolling gears 315 are connected to both ends of the handle 302. A transverse gear plate 316 is meshed with the surface of the rolling gear 315, and the transverse gear plate 316 is fixed to the plate 301. If the position of the grinding wheel 403 remains fixed, the position of the window corner grinding will be an arc, which will cause defects. Therefore, a transverse movement device is provided. At this time, the operator can rotate the handle 302, thereby driving the rotation of the rolling gear 315. The mutual engagement between the gear and the teeth will drive the transverse gear plate 316 to move horizontally. The transverse movement of the transverse gear plate 316 will drive the plate 301 connected thereto to move left and right. At this time, the grinding device 4 will move horizontally, so the grinding process presents a two-way process of horizontal and horizontal movement, maintaining a linear grinding environment.

[0035] In addition, the grinding device 4 includes a drive motor 401, which is fixed to the flat plate 301 via a connecting plate. The output end of the drive motor 401 is fixedly connected to a drive shaft 402, and the bottom of the drive shaft 402 is connected to a grinding wheel 403. The high-speed rotation of the drive motor 401 drives the synchronous rotation of the grinding wheel 403, thereby grinding the position of the weld.

[0036] It is worth noting that the surface of the drive shaft 402 is fixedly connected to the first gear 404, the surface of the first gear 404 is meshed with the second gear 405, the side of the second gear 405 is fixedly connected to the clamping shaft 409, the clamping shaft 409 is slidably connected to the pulley 1 406 through a keyway, the surface of the pulley 1 406 is connected to the pulley 2 407 through a toothed belt transmission, the interior of the pulley 2 407 is connected to the side grinding plate 408 through an axis, the side of the pulley 2 407 is rotatably connected to the bracket 413, the bottom of the bracket 413 is slidably connected to the clamping shaft 409 through a keyway, the clamping shaft 409 is rotatably connected to the connecting frame 411, and the right end of the connecting frame 411 is connected to the transverse rod 312. In order to improve the overall grinding efficiency, the side of the window frame 1 is ground. When the drive shaft 402 rotates, the engagement of the bevel gear will drive the rotation of the card shaft 409, and the card shaft 409 will drive the rotation of the pulley 406 through the keyway connection, and then drive the side grinding plate 408 to rotate through the transmission connection of the toothed belt. The side grinding plate 408 is set to grind the side.

[0037] It's worth noting that a compression spring 410 is sleeved onto the surface of the clamping shaft 409. One end of the compression spring 410 abuts the side of pulley 1 406, while the other end is connected to the end face of the clamping shaft 409. The use of two symmetrical compression springs 410 provides a compressive force to maintain the relative position of pulley 1 406, preventing misalignment. Because the side grinding disc 408 doesn't need to move laterally when the grinding wheel 403 moves laterally, the two compression springs 410 prevent pulley 1 406 from shifting when the clamping shaft 409 is subjected to force.

[0038] It is worth mentioning that the bottom of the first gear 404 is rotatably connected to the bottom plate, and a rotating yielding device 412 is provided on the bottom plate. The rotating yielding device 412 includes a gear rack 4122, and the gear rack 4122 is slidably connected to the bottom plate. A resistance rack 4121 is connected to the gear rack 4122, and the side of the resistance rack 4121 is located inside the bottom plate and is connected to a compression spring 4123. The surface of the gear rack 4122 is meshed with a large gear 4124, and the large gear 4124 is fixedly connected to the bracket 413. When the grinding device 4 expands and moves, it will drive the base plate to move synchronously, and the movement of the base plate will drive the synchronous movement of the contact frame 4121, and then it will abut against the vertical side of the window frame 1. After continuing to move, it will control the gear frame 4122 connected to the contact frame 4121 to move horizontally. After the gears are engaged, it will drive the large gear 4124 to rotate, and then drive the bracket 413 to rotate in a circle around the card shaft 409, and then rotate the two side grinding discs 408 to the side weld position of the window frame 1, realizing the effect of rotational grinding, so that the overall three-sided synchronous grinding is achieved.

[0039] The electrical components mentioned in this article are all connected to an external main controller and 220V AC power, and the main controller can be a conventional known device that serves as a control device for a computer or the like.

[0040] The working principle is that first, the entire device needs to be placed inside the window frame 1, and the roller 314 is clamped in the glass installation groove on the inner side of the window frame 1. Then, the window frame 1 is fixed with an external fixing clamp, or the operator can directly use the hand to hold it to a vertical state. Then, the operator's other hand holds the handle 302 to control its downward pressure, thereby driving the downward movement of the pressure plate 2. The downward movement of the pressure plate 2 will drive the sliding column 305 to slide in the inclined groove 310, thereby driving the flat plate 301 to move outward. Through the symmetrical structure set up, the two flat plates 301 will expand outward synchronously at this time, thereby controlling the two rollers 314 at the bottom to roll on the inner side of the window frame 1, and the flat plate 301 Under synchronous movement, the contact slide 308 on the push rod 307 will also be driven to abut against the inner side surface of the window frame 1 to support the window frame 1, and the elastic force of the positioning spring 309 will be used to squeeze and apply a certain degree of thrust to the window frame 1. If the welding position of the window frame 1 is desoldered during the force-bearing process, it means that there is a hidden danger in the welding of the window frame 1, such as desoldering or cold welding, and re-welding is required. Therefore, it can also play a certain degree of detection effect. When the flat plate 301 moves laterally and outward, it will drive the entire grinding device 4 to move, and move the grinding wheel 403 to the weld position of the window corner. Then, the drive motor 401 is started, and the high-speed rotation of the grinding wheel 403 is driven by the drive of the motor to perform the grinding operation. If the position of the grinding wheel 403 is always kept fixed, the position of the window corner grinding will be an arc shape, which is a defect. Therefore, a transverse movement device is provided. At this time, the operator can rotate the handle 302, thereby driving the rotation of the rolling gear 315. The mutual engagement of the gear and the teeth will drive the transverse movement of the transverse tooth plate 316, and the transverse movement of the transverse tooth plate 316 will drive the connected plate 301 to move left and right, thereby achieving transverse movement of a certain distance. The length of the sliding column 305 is long, so the plate 301 will not interfere with the pressure plate 2 when moving, and when the plate 301 moves, the entire T-block 306 will slide at the bottom of the pressure plate 2, so there will be no interference. The reset spring 304 is provided so that when the operator releases the handle 302, that is, after the downward pressure is released, the equipment will be elastically lifted by the two reset springs 304 and reset. Therefore, when the plate 301 moves laterally, the grinding wheel 403 on the entire grinding device 4 will be driven to move laterally, so the grinding process presents a horizontal and horizontal bidirectional process, maintaining a linear grinding environment.In order to improve the overall grinding efficiency, a grinding device is provided for the side of the window frame 1. When the drive shaft 402 rotates, the engagement of the bevel gear will drive the rotation of the card shaft 409, and the card shaft 409 will drive the rotation of the pulley 406 through the keyway connection, and then drive the side grinding sheet 408 to rotate through the transmission connection of the toothed belt. The side grinding sheet 408 is provided for grinding the side, but in the initial stage, the side grinding sheet 408 is in a retracted state, because in the retracted state, the entire grinding device is convenient to be placed directly on the window On the window frame 1, when the grinding device 4 expands and moves, it will drive the base plate to move synchronously, and the movement of the base plate will drive the synchronous movement of the contact frame 4121, and then it will abut against the vertical side of the window frame 1. After that, it will continue to move, which will control the gear frame 4122 connected to the contact frame 4121 to move horizontally. After the gears are engaged, it will drive the rotation of the large gear 4124, and then drive the bracket 413 to rotate in a circular shape of the clamping shaft 409, and then rotate and shift the two side grinding discs 408 to the side weld position of the window frame 1, achieving the effect of rotary grinding. The clamping shaft 409 is a keyway structure, so even if the grinding device 4 moves horizontally, the pulley 1 406 will slide on the clamping shaft 409 and keep it rotating. Therefore, when grinding the side, the lateral movement of the equipment will not cause interference, and the two symmetrically structured extrusion springs 410 will provide extrusion elastic force to control the pulley 1 406 to always maintain the relative position to avoid cross-positioning. Therefore, the overall principle is that the operator presses down with his hand and rotates a certain component, which will control the relative movement of the grinding device 4 to the weld position to be ground. Under the condition of synchronous movement and pressure, the side grinding parts will also be controlled to unfold, and the window corner position of the window frame 1 will be synchronously ground on three sides, thereby improving the overall grinding efficiency and facilitating the operator's actual operation.

[0041] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

Claims

1. A window corner weld grinding device, characterized in that: include Window frame (1); Two grinding devices (4) for grinding the welded parts of the window frame (1); An expansion mechanism (3) is used to control the relative outward movement of the two grinding devices (4) to position the window frame (1) and simultaneously perform lateral displacement; A pressure plate (2) is provided between the two grinding devices (4), and the expansion mechanism (3) includes a rolling device, a moving device, a pressing device and a transverse moving device; The rolling device is used to slide on the inner side of the window frame (1), the moving device is used to control the two grinding devices (4) to unfold and move them to the weld of the window corner, the transverse movement device is used to control the grinding device (4) to move transversely, and the pressing device is used to support and position the window frame (1). The rolling device comprises a limiting rod (313), the bottom of the limiting rod (313) is connected to a roller (314) through a shaft, the roller (314) is provided with a rolling ring, the rolling ring slides in the inner wall slot of the window frame (1), the limiting rod (313) is connected to a transverse rod (312), and the limiting rod (313) is slidably connected to the pressure plate (2); The moving device comprises a flat plate (301), an inclined groove (310) is provided on the flat plate (301), a sliding column (305) is slidably connected in the inclined groove (310), the sliding column (305) is connected to the pressing plate (2) through a connecting piece, a transverse groove (311) is provided on the flat plate (301), the transverse rod (312) is slidably connected inside the transverse groove (311), the two grinding devices (4) are respectively arranged on the two flat plates (301), the bottom of the pressing plate (2) is slidably connected to a T-shaped block (306) through a T-shaped groove, the bottom of the T-shaped block (306) is connected to a guide rod (303), the guide rod (303) is slidably connected inside the flat plate (301), and a return spring (304) is sleeved on the surface of the guide rod (303); The pressing device includes a push rod (307), one end of the push rod (307) is connected to a contact slide plate (308), the other end of the push rod (307) is slidably connected to the inside of the flat plate (301), a positioning spring (309) is provided inside the flat plate (301), and the left end of the positioning spring (309) is connected to the right end of the push rod (307); The transverse shifting device comprises a handle (302), the handle (302) being rotatably connected to the pressure plate (2) via a connecting piece, and rolling gears (315) being connected to both ends of the handle (302), and a transverse shifting tooth plate (316) being engaged on the surface of the rolling gear (315), and the transverse shifting tooth plate (316) being fixed to the flat plate (301).

2. The window corner weld grinding device according to claim 1, characterized in that: The grinding device (4) comprises a driving motor (401), the driving motor (401) being fixed to the flat plate (301) via a connecting plate, the output end of the driving motor (401) being fixedly connected to a driving shaft (402), and the bottom of the driving shaft (402) being connected to a grinding wheel (403).

3. The window corner weld grinding device according to claim 2, characterized in that: The surface of the driving shaft (402) is fixedly connected to a first gear (404), the surface of the first gear (404) is meshed with a second gear (405), the side of the second gear (405) is fixedly connected to a clamping shaft (409), the clamping shaft (409) is slidably connected to a pulley 1 (406) via a keyway, the surface of the pulley 1 (406) is connected to a pulley 2 (407) via a toothed belt transmission, the interior of the pulley 2 (407) is connected to a side grinding plate (408) via an axle rod, the side of the pulley 2 (407) is rotatably connected to a bracket (413), the bottom of the bracket (413) is slidably connected to the clamping shaft (409) via a keyway, the clamping shaft (409) is rotatably connected to a connecting frame (411), and the right end of the connecting frame (411) is connected to the transverse rod (312).

4. The window corner weld grinding device according to claim 3, characterized in that: The surface of the clamping shaft (409) is sleeved with an extrusion spring (410), one end of the extrusion spring (410) abuts against the side surface of the pulley (406), and the other end of the extrusion spring (410) is connected to the end surface of the clamping shaft (409).

5. The window corner weld grinding device according to claim 4, characterized in that: The bottom of the first gear (404) is rotatably connected to a bottom plate, and a rotational yielding device (412) is provided on the bottom plate. The rotational yielding device (412) includes a gear rack (4122), and the gear rack (4122) is slidably connected to the bottom plate. A resistance rack (4121) is connected to the gear rack (4122), and the side of the resistance rack (4121) is located inside the bottom plate and is connected to a compression spring (4123). A large gear (4124) is meshed with the surface of the gear rack (4122), and the large gear (4124) is fixedly connected to the bracket (413).

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