1053 results about "Angle grinder" patented technology

The disclosure relates to a housing apparatus, in particular a hand-held power tool housing, for a hand-held power tool, in particular an angle grinder, with at least one handle housing which comprises at least one bow handle, with at least one motor housing which comprises a storage area in which a drive unit of the hand-held power tool can be disposed and which specifies an orientation of an axis of rotation of the drive unit, wherein, viewed in a direction parallel to the axis of rotation, the handle housing, in particular the bow handle, is disposed on the motor housing at least substantially entirely on a side of the motor housing facing away from a gearbox housing connection region of the motor housing, and with at least one battery pack interface for placement of at least one battery pack which is disposed on the handle housing on a side of the handle housing facing away from the bow handle.It is proposed that, viewed along a direction perpendicular to the axis of rotation, the bow handle projects largely beyond the motor housing.

The invention is suitable for the technical field of aluminum alloy welding, and provides an aluminum alloy pipeline welding device and a welding method thereof.The aluminum alloy pipeline welding device comprises a welding unit and a slow cooling unit; the welding unit comprises a supporting frame, a displacement air cylinder, a displacement sliding block, an electric telescopic rod, a rotating disc, a sliding rail, an electric sliding block, an adjusting piece and a welding gun. The slow cooling unit comprises a fixing plate, a fixing block, a telescopic air cylinder, a telescopic plate, an arc-shaped rail, an electric arc block, a heating plate and an electric heating wire. The four to-be-welded areas of the aluminum alloy pipeline and the flange are divided, the four to-be-welded areas do not make contact with spot welding on the formal welding path, welding operation continues after impurities on the surface of the spot welding area are ground through the angle grinder, and therefore the strength and the sealing performance of a welding seam are improved, and the welding efficiency is improved. And the welding quality of the welding position of the aluminum alloy pipeline and the flange is improved.

The invention discloses a device for polishing weld grooves of aluminum pipelines and containers in a module, which is characterized in that a horizontal clamping station and a vertical clamping station are arranged on a clamping platform, a lower rotating roller group is rotatably mounted on the clamping platform on the horizontal clamping station, a horizontal clamping support frame is fixedly mounted on the clamping platform, and a lower rotating roller group is rotatably mounted on the clamping platform on the vertical clamping station; an upper rotating roller set is installed on the horizontal clamping supporting frame in a lifting mode, and a clamping chuck is rotationally installed on the portion, located on the vertical clamping station, of the clamping platform. A grinding frame is fixedly installed on the grinding platform, a transverse driving sliding seat is installed on the grinding frame, a lifting driving sliding seat is installed on the transverse driving sliding seat in a sliding mode, a longitudinal driving sliding seat is installed on the lifting driving sliding seat in a sliding mode, and a connecting grinding rod is fixedly installed on the longitudinal driving sliding seat. An angle grinder is mounted at the free end of the connecting grinding rod through a sleeving structure; according to the polishing device, the pipeline can be clamped in the horizontal state and the vertical state at the same time, different polishing states are facilitated, meanwhile, the polishing position is adjusted, manual participation is reduced, and safety is improved.

A method for replacing the petal of a runner chamber of a vertical turbine unit and a device for measuring and grinding the runner chamber, the method comprises: making a new runner chamber, cutting the petals of the new runner chamber, processing the assembled petal body, preparing the petal body before installation, installing the petal body, grouting, and measuring and grinding the new runner chamber. The method realizes efficient replacement of the runner chamber and inspection of the inner wall of the runner chamber, and the parameters of the runner chamber are precisely controlled. The device comprises two cross-shaped brackets, a rotating shaft, two flange bearings, two sets of adjustment parts, a rotating frame, two limit studs, a measuring and grinding mechanism, four precision linear guide rails and a precision slide block; the new runner chamber in the vertical turbine unit is in a non-contact state with the cross-shaped bracket, and the cross-shaped bracket is welded with the guide blade bottom ring and the tailwater pipe in the vertical turbine unit; through the adjustment part, the axis of the rotating shaft coincides with the center line of the new runner chamber, and the flange bearing is positioned; the measuring head and the grinding head of the angle grinder point to the inner wall of the new runner chamber. The device has a reasonable structure and is easy to use.

The present utility model provides a dual-purpose protective cover for an angle grinder, used for solving the problem of being inconvenient to frequently disassemble and assemble cover plates of existing angle grinders. The dual-purpose protective cover comprises a first protective cover and a connecting part; the first protective cover comprises a semicircular or fan-shaped base and a surrounding edge arranged on the edge of the base, and the surrounding edge extends towards one side of the base at a set length; an arc-shaped notch used for allowing a rotating shaft of an external angle grinder to pass through is further formed in the circle center part of the base; an extending part protruding towards the side away from the surrounding edge is arranged at the notch of the base; the connecting part used for connecting the angle grinder is fixedly arranged on the extending part of the base; the dual-purpose protective cover further comprises a second protective cover; the second protective cover is fixedly arranged on the side of the surrounding edge away from the base; and the second protective cover is in a truncated small circle shape. The present utility model has the following advantages: first, chippings can be effectively prevented from flying away from the side surface of the protective cover; second, the interference of the second protective cover on a material needing angle grinding during angle grinding is reduced, and the operation is convenient; and third, the present solution has simple structure and low costs, and achieves easy industrial processing.

The invention belongs to the technical field of surface strengthening, and particularly relates to an aluminum alloy friction stir welding seam fatigue-free method based on rolling strengthening. The method comprises the following steps: (1) carrying out a microhardness test and a tensile test on an aluminum alloy matrix to obtain the hardness and tensile strength of the matrix; and (2) friction stir welding is conducted. The tensile strength after friction stir welding is not lower than 65% of the fatigue strength of a base body by adjusting friction stir welding process parameters; and (3) the surface of the friction stir welding part is treated. The surface of the welding seam is polished through an angle grinder and abrasive paper, so that the surface roughness of the welding seam reaches about Ra1.2 microns; and (4) rolling surface strengthening is carried out. Surface strengthening process parameters are adjusted, so that the surface hardness of a heat affected zone of the weld joint subjected to surface strengthening is not lower than the surface hardness of a matrix, the surface roughness Ra is not higher than 0.5 mu m, and the surface residual compressive stress is not lower than 100 MPa; and (5) carrying out a fatigue test.

The invention provides a high-precision positioning rotary table assembly of an electric grinder grinding head polishing machine, and belongs to the technical field of electric angle grinder grinding head manufacturing. The problems that high-automation station switching equipment is not developed for an existing grinding head polishing machine, and meanwhile high precision and concise performance need to be guaranteed are solved. The device comprises a base internally provided with a cavity, a disc-shaped rotary table rotationally arranged above the base through a center shaft, and a switching driving piece arranged in the cavity and used for providing rotation of the rotary table. Six stations are arranged above the base and sequentially comprise the feeding station, the forward polishing station, the turn-over station, the reverse polishing station, the discharging station and the positioning station in the clockwise direction. Compared with the prior art, the rotary table assembly is extremely high in positioning precision, a detection station is independently arranged, and precise positioning detection after station switching is achieved through a laser detector.

The invention discloses a steel formwork surface treatment robot based on magnetic adsorption wall climbing, and belongs to the technical field of polishing and cleaning, the steel formwork surface treatment robot comprises a walking chassis and a polishing head, the polishing head is composed of a support, a flexible screw-down mechanism and an angle grinder, the support is arranged on the walking chassis, and the angle grinder is arranged on the support through the flexible screw-down mechanism; the flexible pressing mechanism is composed of a vertical frame, a U-shaped supporting plate, a triangular groove frame, an H-shaped double-fork arm, an adjustable damping spring and a connecting plate. The vertical frame is connected with the U-shaped supporting plate so as to clamp the angle grinder. The triangular groove frame is hinged to the U-shaped supporting plate through a fourth hinge shaft. The H-shaped two-fork arm is rotationally connected with the connecting plate and is hinged with the two vertical frames through a second hinge shaft and a third hinge shaft respectively; the two ends of the adjustable damping spring are hinged to the fifth hinge shaft and the connecting plate correspondingly, and the connecting plate is fixedly connected to the support. The first hinge shaft and the second hinge shaft of the triangular groove frame are rotationally connected to the support. According to the robot, efficient and stable automatic grinding and cleaning operation can be achieved in the complex construction environment, and the risk and cost of manual operation are reduced.

The invention provides electric grinder grinding head turn-over polishing equipment accurate in positioning, and belongs to the technical field of electric angle grinder grinding head manufacturing. The polishing device solves the problem that special polishing equipment with good positioning performance and good coordination for the grinding head of the electric grinder urgently needs to be developed in the existing market. The full-automatic polishing machine comprises a rack, a rotary table component, a material taking component, a discharging component, a positioning detection component, a forward polishing component, a reverse polishing component and a face turning component, the rotary table component is provided with six stations, and the six stations are the feeding station, the forward polishing station, the face turning station, the reverse polishing station, the discharging station and the positioning station in sequence in the clockwise direction. Compared with the prior art, the polishing device has extremely high automation capacity and precision performance, and the front face and the back face of the grinding head can be automatically subjected to polishing operation with high connection performance and accurate positioning.

The utility model discloses an angle grinder. The angle grinder comprises a shell; the output shaft is arranged to be capable of rotating relative to the shell; the motor is arranged to drive the output shaft to rotate; the transmission assembly is arranged to realize power transmission between the motor and the output shaft; the housing includes: a head configured to mount the output shaft; the battery pack combination part is arranged to be detachably combined with the battery pack; the connecting part is connected with the head part and the battery pack combining part in the transverse direction; the connecting part comprises a motor shell part which is arranged to contain at least part of the motor, and the motor is at least partially arranged in the motor shell part in the transverse direction; and the handle part is arranged to be held by a user. While a user holds the angle grinder conveniently, the output power of the angle grinder is guaranteed, the use comfort is improved, and therefore the working efficiency is guaranteed.

The utility model belongs to the technical field of gear ring machining, and particularly relates to gear ring polishing and deburring equipment which comprises a rack serving as a connecting base frame, a supporting component connected to the rack and a motor installed at the bottom of the rack, the output end of the motor is connected with the input end of a transmission, and the transmission is connected to the outer side of the rack. The output end of the transmission is connected with the rotating seat, the rotating seat is rotationally connected to the top of the rack, the clamping seat is arranged at the top of the rotating seat, the angle grinding component is connected to the rack and grinds a gear ring arranged on the clamping seat, the motor drives the rotating seat to rotate from the top of the rack, the gear ring arranged on the clamping seat rotates at a constant speed, and the grinding efficiency is improved while subsequent uniform grinding is facilitated. The first air cylinder drives the angle grinder connected to the outer side of the first movable plate to horizontally move along the outer side of the support, then the height of the angle grinder is changed, the position of an angle grinding piece is conveniently adjusted, and follow-up angle grinding operation is facilitated.

The utility model relates to the technical field of steel structure machining, in particular to a groove grinding device for steel plate welding, which comprises a handle, a grinding wheel and a semicircular baffle disc, a driving part for driving the grinding wheel to rotate is arranged in the handle, and the semicircular baffle disc is mounted between the handle and the grinding wheel and positioned on one side, close to the handle, of the grinding wheel. A movable blocking cover is detachably installed at the opening end of the semicircular blocking disc, material blocking ripping fences are arranged on the outer contours of the movable blocking cover and the semicircular blocking disc, the end faces of the sides, close to the grinding wheel, of the material blocking ripping fences do not exceed the non-working face of the grinding wheel, and a plurality of magnets used for attracting steel scraps are arranged on the surfaces of the sides, close to the grinding wheel, of the movable blocking cover and the semicircular blocking disc. The problems that when a bevel slope of a traditional steel plate is polished before welding, a worker needs to hold an angle grinder by hand for operation, waste chips generated during polishing are likely to splash to the worker, the worker is damaged, and potential safety hazards exist are solved.

The utility model belongs to the technical field of electrolytic aluminum, and discloses a multifunctional tail end ferrophosphorus cleaning mechanism which comprises a rack, a guide rail is installed on the rack and slidably connected with a floating base, an outer ring of the guide rail is sleeved with a compression spring, and the floating base moves in the axis direction of the guide rail to change the compression amount of the compression spring. The floating base is connected with the angle grinder body through the fixing support, a rotating shaft of the angle grinder body is connected with the vibrating wheel, a rotating shaft base outer ring of the angle grinder body is connected with the vibrating support, the vibrating support is connected with the bolt in a threaded mode, and the bolt is provided with a threaded section and a positioning section in the axial direction. The positioning section is inserted into a scraper knife base, the scraper knife base is provided with a positioning hole matched with the positioning section, the scraper knife base is provided with a vibration cavity used for being matched with a vibration wheel, the vibration wheel is located in the vibration cavity, the vibration wheel strikes the cavity wall of the vibration cavity when rotating, a vibration column is arranged on the surface of the scraper knife base, and the vibration column of the scraper knife base is inserted into a semicircular scraper knife. The vibration column transmits vibration striking from the vibration wheel to the semicircular scraper knife.

The utility model discloses an angle grinder and an electric tool. The angle grinder comprises a shell; the output shaft is arranged to be capable of rotating relative to the shell; the motor is arranged to drive the output shaft to rotate; the transmission assembly is used for realizing power transmission between the motor and the output shaft; the housing includes: a head configured to mount the output shaft; the battery pack combination part is arranged to be detachably combined with the battery pack; the connecting part is used for connecting the head part and the battery pack combining part along the transverse direction; the connecting part comprises a motor shell part which is arranged to accommodate at least part of the motor, and the motor is at least partially arranged in the motor shell part in the transverse direction; the handle part is arranged to be held by a user; in the transverse direction, the handle part is arranged between the motor shell part and the battery pack combination part, and the difference value between the perimeter of the motor shell part and the perimeter of the handle part is larger than or equal to 62 mm. The diameter of the handle part can be effectively reduced, so that a user can hold the handle conveniently, and the use comfort is improved.

The invention provides a 60NiTi alloy high-purity preparation and rolling forming method. The 60NiTi alloy high-purity preparation and rolling forming method comprises the steps that firstly, raw material treatment is conducted, wherein the surface of a raw material is cleaned; step 2, vacuum induction suspension smelting; step 3, annealing treatment; step 4, pretreatment before rolling; fifthly, rolling forming is carried out; and sixthly, the sheath is removed, specifically, the sheath is cut off through an angle grinder, and the internal 60NiTi alloy plate is obtained. According to the method, a low-C-content high-quality cast ingot is prepared through a vacuum suspension smelting process of vacuum-pulsed magnetic field composite degassing, and a rolling forming process is adjusted according to the millisecond-level rapid precipitation characteristic of a Ni4Ti3 phase in the alloy and the metal flowing behavior in the plastic forming process; the problems that in the alloy rapid forming process, hard phase rapid precipitation and recrystallization are difficult are solved, the defects of non-uniform crystal grains, transverse cracks, longitudinal cracks and crocodile opening type cracks in the rolling process are avoided, and the 60NiTi alloy rolled plate uniform in microstructure and excellent in comprehensive performance is obtained.

The utility model belongs to the technical field of angle grinders, and particularly relates to an angle grinder convenient to adjust, which comprises a base, a support table, an angle grinder and a sanding disc, a grinding device is arranged on the left side of the angle grinder, and the grinding device comprises a dust removal unit, an adjusting unit and a protection unit. According to the angle grinder convenient to adjust, the dust removal unit is arranged, an exhaust fan is started, dust generated during grinding is sucked into the collecting box through an exhaust inlet and a connecting pipe to be collected, and therefore the situation that a worker inhales much dust to damage the body is prevented, and the problem that in the background technology, in the grinding process of metal and stone, in the prior art, the dust is prone to falling off is solved. By arranging a protection unit, when the angle grinder is not used, two half protection covers are installed on the left side and the right side of a sanding disc and are fixed through nuts, the situation that the worker touches the sanding disc by mistake is avoided, and the working efficiency is improved. And the side face of the sanding disc is prevented from scratching workers.

1. The name of the product of this design: Multi-purpose angle grinder milling wheel. 2. Purpose of this design product: used for milling wheels on angle grinders. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the key points of the design: Design 1 Stereoscopic drawing 1. 5. Designate Design 1 as the base design.

The invention provides chip angle grinding equipment and a grinding method, the chip angle grinding equipment comprises an angle grinding base and an angle grinding body, and a first roller and a second roller are connected with a grinding belt in a winding manner. The angle grinder body drives the first rolling wheel and the second rolling wheel to rotate synchronously, so that the grinding belt can continuously and stably grind the side face of the chip. And through cooperation of the first rolling wheel and the second rolling wheel, the grinding belt can uniformly distribute grinding force on a large contact area, and the grinding efficiency is improved. The angle grinder base is adopted as an integral supporting structure, and the angle grinder body and the workbench are mounted on the angle grinder base, so that the whole equipment is compact in structure, small in occupied space and convenient to integrate into a production line. The grinding belt is adopted for grinding, compared with a rigid grinding wheel, the contact face of the grinding belt is good in flexibility, grinding force can be distributed more evenly, the risk that chips are damaged due to impact or stress concentration is reduced, and therefore the yield of chip machining is effectively increased.

The utility model discloses a device for processing a hook spring workpiece, the hook spring is a C-shaped structural member formed by folding a steel belt and stamping, the device comprises a bottom plate, a workpiece positioning seat and a support frame, the workpiece positioning seat and the support frame are arranged on the bottom plate, the workpiece positioning seat is used for accommodating and fixing the hook spring workpiece, and the support frame is used for supporting the hook spring workpiece. The supporting frame is movably connected with the bottom plate through a rotating shaft, an angle grinder is fixedly installed on the supporting frame, the supporting frame is pulled by hand to make the supporting frame move around the shaft relative to the rotating shaft, the angle grinder can be driven to move, the angle grinder gradually gets close to the workpiece positioning base, and then the periphery of a grinding wheel is used for conducting cutting type grinding on the tail end of a hook spring workpiece. The tail end of the hook spring workpiece can be quickly and accurately processed, and the processed end face is very smooth, so that the processing efficiency and the processing precision are greatly improved, and the abrasion to a grinding wheel is reduced.

The invention relates to the technical field of casting bearing seat machining, in particular to a multi-angle angle grinder applied to casting bearing seat production and machining, which comprises a machining platform and an angle grinder body, an embedded electric control adjusting ring is mounted on the upper surface of the machining platform, and an upper mounting bracket is fixedly assembled at the upper end of the embedded electric control adjusting ring; and an electric control telescopic arm is mounted at the front end of the upper mounting bracket. According to the multi-angle angle grinder applied to casting bearing seat production and machining, the position and angle of the angle grinder body are changed in a multi-angle and large-range mode through the design of electric control rotation and electric control overturning, casting movement can be avoided, and the grinding precision and stability are improved; the upper mounting bracket can be overturned and stored in idle hours, and the angle and the height can be adjusted through overturning in busy hours, so that the storage and the transportation of the mounting bracket are greatly improved.

The utility model discloses a brushless lithium battery angle grinder which comprises a brushless lithium battery angle grinder control base, a protection adjusting mechanism is fixedly arranged on one side of the brushless lithium battery angle grinder control base, and a protection positioning mechanism is fixedly arranged at the bottom end of the protection adjusting mechanism. The protection adjusting mechanism comprises a positioning frame, and a positioning ring is fixedly arranged on one side of the positioning frame. The positioning gear ring drives the positioning seat to rotate along the positioning ring, so that the positioning seat drives the protective cover fixed at the top end to rotate, the protective cover rotates along the positioning groove formed in the outer wall of the mounting seat, and the protective cover and the protective positioning mechanism at the bottom end rotate; according to the brushless lithium battery angle grinder, the angle grinding wheel can be conveniently used for grinding at different angles, the brushless lithium battery angle grinder can conveniently conduct grinding work under different working environments, the brushless lithium battery angle grinder can conveniently conduct stable protection at different angles through the protection positioning mechanism, and the practicability of the brushless lithium battery angle grinder is improved.

The utility model discloses a grinding wheel cover connecting mechanism arranged on an angle grinder, which comprises a mounting plate and a ring sleeve, one end of a rotating shaft extending into a grinding wheel cover is fixedly provided with a saw grinding sheet, and the mounting plate is provided with a groove connecting part around the ring sleeve. A protruding part extending out of the surface of the inner wall of the mounting plate is arranged at the position, corresponding to the groove connecting part, of the inner wall of the mounting plate, a wear-resisting distance increasing cushion cover is arranged between the protruding part and the saw grinding piece, and the outer circumference of the saw grinding piece extends out of the edge of the protruding part; the groove connecting part is arranged on the outer wall of the mounting plate on the side wall of the grinding wheel cover, the end part of the transmission mechanism is fixed on the groove connecting part through the ring sleeve, the protruding part on the inner wall of the mounting plate extends out of the back surface of the groove connecting part, and the protruding part extends out of the outer circumference of the saw grinding sheet; the gap between the saw grinding piece and the inner wall of the mounting plate is increased through the protruding part, and the edge wiping phenomenon of the saw grinding piece is avoided under the condition that the power of the saw grinding piece is not increased.

The invention provides an angle grinder performance testing device and method. The device comprises a tool support, wherein the tool support is provided with two oppositely-arranged supporting stand columns; the suspension beam is located between the two supporting stand columns, and the two ends of the suspension beam are slidably connected with the supporting stand columns respectively; one end of the elastic connecting piece is connected with the tool support, the other end of the elastic connecting piece is connected with the suspension beam, and the elastic connecting piece is configured to elastically hang the suspension beam on the tool support; the fixing part is arranged on the suspension beam and is used for fixing the angle grinder on the suspension beam; and the balancing weight is configured to apply a load with a set weight to the angle grinder. According to the angle grinder, the suspension device is ingeniously designed, the gravity of the angle grinder and the suspension device and the upward pulling force of the elastic connecting piece are in a balanced state to eliminate the gravity of the angle grinder, then force is applied to the angle grinder through the balancing weight, and the grinding test of applying force through pressing by a human hand is accurately simulated. The device can accurately control the magnitude and angle of applied force, the test result is accurate, and the device is convenient, safe and efficient to operate and use.

The utility model relates to an angle grinder quick-change grinding wheel cover, which comprises a protective cover, an elastic limiting mechanism and a head shell mechanism, the protective cover is C-shaped, the head shell mechanism comprises a front cover and a bottom cover, the front cover is fixedly arranged above the bottom cover, the bottom cover is fixedly arranged in an angle grinder head, an assembly part is arranged at the bottom of the protective cover, and the elastic limiting mechanism is arranged on the assembly part. Width limiting rib plates are arranged at the two ends of the assembling part, the front cover is provided with two flat squares matched with the width limiting rib plates, and the assembling part is detachably connected with the front cover; the assembling part is further provided with more than one limiting hole matched with the elastic limiting mechanism, the elastic limiting mechanism is fixedly installed in the bottom cover, and the end portion of the elastic limiting mechanism and the limiting hole are clamped and limited in a matched mode. According to the utility model, rapid assembly and disassembly and position adjustment of the protective cover can be realized.

The utility model relates to a cable cutting device which comprises an angle grinder, a guide assembly, a clamping assembly, a cutter feeding assembly and a protective shell, the angle grinder comprises an electric angle grinder and a cutting blade, the electric angle grinder drives the cutting blade to rotate, the protective shell wraps the outer surface of the cutting blade, the clamping assembly and the cutter feeding assembly are installed on the protective shell, and the cutter feeding assembly is installed on the protective shell. The feed assembly moves along the guide assembly. According to the cable cutting device, the rechargeable lithium battery angle grinder is adopted as cutting power, the problem that a hydraulic cutting nipper and an electric grinding machine (floor type) depend on an alternating current power supply or an engine is solved, the cable cutting device is more suitable for outdoor or field construction environments, and the weight of a tool is greatly reduced.

The utility model relates to the technical field of angle grinders, in particular to a vibration and noise reduction angle grinder which comprises a main body, a motor is installed on the inner side of the main body, an outer cover is fixedly installed on the lower side of the head end of the main body, a grinding piece is installed on the lower side of the outer cover, and a handle is fixedly installed on the front face of the head end of the main body. A vibration reduction structure is installed on the outer side of the handle and comprises a fixing block, the fixing block is fixedly connected to the front face of the handle, limiting sliding blocks are arranged on the two sides of the front end of the fixing block, vibration reduction springs are fixedly connected to the upper face and the lower face of the fixing block, and a damper is installed on one side of each vibration reduction spring. According to the angle grinder, the vibration reduction structure is installed on the handle at the head end of the main body, the influence on the hand pressing the head end of the angle grinder during vibration can be greatly relieved, meanwhile, the outer cover can be better attached to the machining face by pressing the vibration reduction structure, the use effect of the angle grinder is further guaranteed, and the angle grinder is more practical.

The present invention provides a grinding device, relating to the technical field of machining machinery. The grinding device comprises a mounting frame, a slewing bearing, and an angle grinder. The slewing bearing is mounted on the mounting frame, and the angle grinder is mounted on the slewing bearing. The slewing bearing can drive the angle grinder to perform a slewing motion about the slewing bearing's rotational centerline. The mounting frame is used to connect a grinding workpiece. This alleviates technical problems in the prior art, such as safety hazards when grinding a grinding workpiece, the tendency to cause arm soreness in workers, and consequently, low grinding accuracy.

The invention relates to the technical field of tap production, and discloses a cutting edge chamfering grinder and a grinding method for a front-throwing tap. The device comprises an angle grinder body, the angle grinder body comprises an outer shell, a grinding assembly is arranged on the inner bottom wall of the outer shell, and a supporting assembly is arranged on the lower surface of the outer shell. The grinding assembly comprises a conveying structure, and the conveying structure is located below the grinding assembly. The grinding assembly comprises a first grinding wheel, a second grinding wheel and a third grinding wheel. When the tap passes through a meniscus located below a detection plate during movement, if there is a burr in a groove on the tap, an extrusion force is generated on the bottom end of a detection needle, so that the detection needle moves upward, and the size of the burr is judged according to the stretching amount of a spring located on the detection needle, so as to detect the size of the burr in the tap groove, and control a first electromagnet to move the first grinding wheel longitudinally according to the detection data, so as to grind and clean different burr sizes according to the grinding intensity generated at different heights.

The utility model provides a curbstone renovating machine, which relates to the technical field of road maintenance equipment, and comprises two groups of angle grinders and an angle grinder handheld frame, the angle grinder handheld frame consists of an upper plate and a side plate, the angle grinders are respectively arranged on the inner sides of the upper plate and the side plate, the upper plate and the side plate are rotatably connected through a rotating shaft, and the rotating shaft is connected with the angle grinder handheld frame. Angle adjusting structures are arranged among the upper plate, the side plates and the rotating shaft, and moving wheels are arranged at the ends, away from the rotating shaft, of the upper plate and the side plates; according to the curbstone renovating machine, by improving a traditional renovating mode, the effects of double-face synchronous renovating, angle adjustability, convenient and fast movement and high safety are achieved, and the curbstone renovating machine plays a positive role in improving the curbstone renovating efficiency and maintaining the city image.

The utility model discloses an angle grinder protective cover structure which comprises a protective cover which is of an annular structure, a grinding groove is formed in one side of the protective cover, a fixing assembly is arranged on the protective cover, a protective assembly is arranged in the protective cover and driven by a driving assembly, and the driving assembly comprises a rotary knob. A mounting hole is formed in the protective cover, a knob is arranged in the hole, a rotating groove is formed in the protective cover, a gear is arranged at the bottom of the knob, the gear is rotationally connected into the rotating groove, and a first rack and a second rack are arranged on the two sides of the gear and are of an annular structure. By rotating the knob, the gear drives the rack I and the rack II to drive the annular protection piece to rotate, so that the angle grinder shield can adjust the size of an opening, and the size of a cutting opening of an angle grinder can be conveniently adjusted according to a machining type.