1107 results about "Sander" patented technology

The present invention relates to an attachment hub for attachment to a sander, comprising a quick-release attachment assembly configured for releasable and aligned engagement with a counterpart of a backup pad particularly for an abrasive disc. Furthermore, the invention relates to a backup pad having a disc-like shape and comprising a first major surface and a second major surface, the first major surface configured for direct or indirect attachment of an abrasive disc, and the second major surface configured for facing towards an attachment hub for attachment to a sander, and a mounting portion for aligned engagement with an attachment hub of a sander.

The utility model relates to the technical field of plate processing equipment, and discloses a plate double-face sanding machine which comprises a machine body, an air cylinder is fixedly installed on the inner top wall of the machine body, a push rod is arranged at the output end of the air cylinder, a lifting seat is fixedly connected to the bottom end of the push rod, and a first sanding frame is fixedly connected to the interior of the lifting seat. A first sanding frame is fixedly connected to the inner wall of the machine body, a second sanding frame is fixedly connected to the inner wall of the machine body, rollers are rotationally connected to the interiors of the first sanding frame and the second sanding frame, a belt is in transmission connection to the exteriors of the rollers, and frosted particles are arranged on the exteriors of the belts. The sanding device has the following advantages and effects that the motor drives the roller to rotate, then the belt and the sanding particles can be driven to conduct transmission, the two sets of sanding particles conduct sanding on the two faces of a plate, then the sanding device can conduct double-face sanding on the plate, in the sanding process, the plate can be fixed, and the sanding efficiency is improved. And the plate is prevented from shaking.

The utility model discloses an automatic dust removal wood sanding machine, relates to the technical field of wood processing, and solves the technical problems that when an existing wood sanding machine is used for processing wood, the phenomenon that chippings splash frequently occurs, and high-temperature chippings can hurt surrounding personnel and pollute the environment. Comprising a machine body, a machining bin arranged on the machine body, an electric lifting cylinder arranged in the machining bin and a polishing structure. The wood fixing mold is arranged in the processing bin, a pair of assembling rods are arranged in a port of the wood fixing mold, clamping air cylinders connected with the assembling rods are arranged on the two sides of the wood fixing mold, and a clamping rod used for fixing wood is arranged on the side face of each assembling rod; suction force is provided by the power suction pump, dust generated during machining of the polishing disc can be synchronously sucked into the blocking filter element from the dust suction cover, the dust suction channel and the corrugated suction pipe, the situation that high-temperature chippings splash to hurt surrounding people is effectively avoided, and pollution to the environment is reduced.

The invention belongs to the technical field of turbine blade machining, and particularly discloses turbine blade machining and grinding equipment which comprises a workbench, the upper end of the workbench is connected with a box body, one side of the upper end of the workbench is connected with a supporting table, the upper end of the supporting table is connected with abrasive belt grinding equipment, and one side of the upper end of the workbench is connected with a mechanical arm mechanism. A blade workpiece is clamped at one end of the mechanical arm mechanism, a stabilizing mechanism is connected to one side of the outer wall of the mechanical arm mechanism and comprises a mounting ring, a connecting frame is connected to one end of the mounting ring, guide blocks are slidably connected to the two sides of the connecting frame, and fixing rods are connected to one sides of the two guide blocks. By means of the mechanical arm mechanism and the stabilizing mechanism with the self-adaptive capacity, flexible supporting is provided when a complex curved surface blade is polished, and therefore high-precision and deformation-free automatic polishing is achieved.

The invention belongs to the technical field of cable processing, and discloses a fire-resistant cable processing device and method. Comprising a bottom plate, clamping equipment fixedly connected to the top of the bottom plate and a belt sander arranged above the bottom plate. By arranging the moving assembly and the speed adjusting assembly, when the belt sander needs to move on the surface of a cable to polish an insulating layer, a motor is started to drive a gear set to move in the direction of a straight rack, so that a first circular plate and the belt sander are driven to move on a bottom plate through a supporting block and a rolling wheel; the electric push rod is started to drive the moving plate to move on the supporting plate, the moving plate can drive the gear set to slide on the surface of the third rotating shaft through the sliding sleeve, other gears of the gear set are meshed with the spur rack, and due to the fact that the tooth numbers of the gears of the gear set are different, the purpose of adjusting the advancing speed of the belt sander can be achieved. And therefore, the belt sander is matched with rotation of the belt sander at different speeds for polishing, and the polishing precision is high through automatic polishing.

The utility model discloses a sanding machine and a green brick conveying device, and relates to the technical field of green brick firing. Comprising a sand discharging assembly, a uniformizing assembly and a sensing assembly which are arranged on a rack, the uniformizing assembly is arranged below the sand discharging assembly, the sand discharging assembly conveys quartz sand to the uniformizing assembly, and when a base plate passes through the lower portion of the uniformizing assembly, the uniformizing assembly spreads the quartz sand into the surface of a green brick. The method has the advantages that a fired finished product cannot be adhered to the base plate, and the yield is high.

The invention discloses a multipurpose sanding machine which comprises an assembly support and a base plate which are fixedly installed. The abrasive belt assembly, the compression roller assembly and the guide roller assembly specifically comprise a loop bar assembly and three different guide roller structures, one of the three guide roller structures can be selected to be installed on the base plate through the loop bar assembly, the three guide roller structures are used for enabling the abrasive belt assembly to be extruded and deformed, and the area, close to the guide roller assembly, of the abrasive belt assembly further forms an operation part. The other two guide roller mechanisms are installed on the assembly support through the loop bar assembly so as to meet various different sanding requirements. The replaceable guide roller assembly is adopted, different guide roller structures are applied according to different requirements, the guide roller structures do not generate unfavorable mutual interference during use, meanwhile, the characteristic that the abrasive belt assembly can freely change the form is utilized, and after the different guide roller structures are replaced, the abrasive belt assembly can be replaced, and the abrasive belt assembly can be replaced. The abrasive belt assembly can be adjusted through movement of the movable guide roller, and the effect that the abrasive belt is tightened for use is always kept.

A scraper and sanding device is disclosed for refining pieces of wood and other surfaces. The scraper and sanding device comprises an attachment shaft component with a plurality of attachment components that can be secured and removed, as needed. Users can attach a scraper blade component or a sanding pad component to the end of the attachment shaft component via a small nut and bolt washer. Users secure the attachment component and then insert it into the Sawzall bit for application to a surface. The scraper blade component and the sanding pad component can be quickly interchanged, as needed.

A flatness control structure for a drywall sander, comprising: a device body, wherein the bottom of the device body is equipped with a rotating device, a housing is arranged below the device body, a sanding component is arranged inside the housing, the sanding component comprises a sanding piece, the bottom of sanding piece is connected to a sanding disc, and the bottom of sanding disc is connected to sandpaper, a threaded bolt is arranged between the sanding piece and the housing, a fixing component is arranged inside the housing, and an installation component is arranged inside the housing. The sander replaces the bristle sections with a wear-resistant strip which is less likely to deform when in contact with the sanding surface. When force is applied, the sander can be firmly fixed on the sanding surface, ensuring stability of the entire sander, thereby improving the flatness of the sanding surface.

The utility model provides steel rail welding seam polishing equipment which comprises a first robot and a second robot, the first robot carries a first belt sander to be located on the first side of a steel rail to be polished through a first mechanical arm, and the second robot carries a second belt sander to be located on the second side of the steel rail to be polished through a second mechanical arm. The first belt sander comprises a first abrasive belt wheel assembly and a first abrasive belt arranged outside the first abrasive belt wheel assembly in a sleeving mode, and the first abrasive belt wheel assembly drives the first abrasive belt to polish a first side welding seam of the steel rail to be polished. The second belt sander comprises a second abrasive belt wheel assembly and a second abrasive belt arranged outside the second abrasive belt wheel assembly in a sleeving mode, and the second abrasive belt wheel assembly drives the second abrasive belt to polish the second side welding seam of the steel rail to be polished. According to the scheme, the two robots are adopted to carry the belt sanders respectively to polish the two sides of the steel rail welding seam at the same time, and the effects that the polishing efficiency is high, the labor cost is saved, and the polishing quality is improved are achieved.

To provide a wheel of a belt sander which enables a feeding speed of a sanding belt to be changed with means other than changing of a rotation speed of a driving source, and to provide a wheel set and a belt sander.SOLUTION: A tube belt sander, one example of a belt sander, includes: an electric motor; and a first driving wheel and a second driving wheel 300 for attaching a sanding belt B. The second driving wheel 300 includes a planetary gear mechanism M which reduces a speed of rotational driving force from the electric motor. The second driving wheel 300 further includes an inner cylinder body 371 and a first shaft body 301. The inner cylinder body 371 is attached to a housing 10 of the belt sander. The first shaft body 301 has a receiving part 301R for receiving the rotational driving force from the electric motor and is disposed at a radial inner side of the inner cylinder body 371.SELECTED DRAWING: Figure 13

The invention discloses a fiberboard polishing and grinding device and a using method thereof, and relates to the field of fiberboard polishing and grinding devices. According to the fiberboard polishing and grinding device and the using method thereof, a transmission frame, a limiting unit, an extrusion unit, a contact unit and a connecting frame are arranged in a sanding machine. According to the fiberboard polishing and grinding device and the using method thereof, the limiting plates make contact with and extrude the two sides of the fiberboard, under the action of the limiting plates, the fiberboard is limited, the situation that the fiberboard deviates in the polishing and grinding process, the polishing and grinding effects of different areas are different is avoided, the grinding effect is better adjusted by adjusting the compression degree of the guide rods, and the polishing and grinding efficiency is improved. The two connecting frames have a height difference, so that the two grinding wheels can be in contact with the fiberboard conveniently, rough grinding is performed through the front grinding wheel, fine grinding is performed through the rear grinding wheel, and the grinding effect and the grinding efficiency are guaranteed.

The invention provides a robot grinding and polishing method and system for titanium alloy casing runner welding slag. The system comprises a robot, a robot controller, a six-dimensional force sensor, a displacement sensor, a three-dimensional scanner, a belt sander and a workbench. The method comprises the following steps: firstly, fixing a casing on a workbench, positioning the casing by using a displacement sensor, scanning a casing flow channel by using a three-dimensional scanner to obtain a flow channel welding slag distribution state, grasping a belt sander by using a robot equipped with a six-dimensional force sensor, carrying out gravity calibration on the belt sander before grinding and polishing, and carrying out welding slag distribution on the belt sander; and the gravity of the belt sander is compensated according to the calibration result. Three-dimensional software is used for dividing a flow channel area, a machining path is calculated through an off-line trajectory planning method, a robot executable machining program is generated through post-processing for grinding and polishing, in the grinding and polishing process, in order to adapt to the complex curved surface of the cartridge receiver flow channel, real-time adjustment is conducted according to the contact force value of a tool and a workpiece, and the contact force value is transmitted to a robot controller; the removal amount can be determined, the roughness is guaranteed, and the surface quality is improved.

The present application relates to a high-roughness surface treatment method for a braking steel backing, and belongs to the technical field of surface treatment of braking steel backings. The method comprises the following operation steps: step one, placing onto a feeding table a braking steel backing to be processed, and conveying the braking steel backing by means of a conveyor belt so as to perform processing; step two, in an HRT polishing assembly, sequentially passing the steel backing through an ordinary belt sander, a forward planetary gear, a reverse planetary gear and an HRT belt sander to complete the processes of surface roughness treatment and deburring; step three, in a cleaning and rust-proofing assembly, removing processing residues and a saponification liquid from the surface of the braking steel backing by means of a rough cleaning sprayer, and then an air knife I blowing off a cleaning liquid and metal residues; step four, using a rust-proofing sprayer to spray a rust-proofing liquid, and then performing double air cutting; and step five, placing the braking steel backing which has been subjected to surface treatment into a material box for standby storage. By means of treating the surface of the braking steel backing bonded with a friction material, the effects of more stable quality and high-roughness mating surfaces are achieved.

The utility model relates to the technical field of polishing, and discloses an anti-explosion bent pipe sander which comprises a base, a fixing clamping seat used for positioning a bent pipe is installed on the upper surface of the base, a control box is arranged on one side of the fixing clamping seat, and a first moving mechanism is arranged on the upper surface of the base. Through cooperation of the first moving mechanism, the second moving mechanism, the rotating mechanism, the driving mechanism, the rotating disc and the polishing mechanism, the position and the inclination angle of the rotating disc can be conveniently adjusted through the first moving mechanism, the second moving mechanism and the rotating mechanism, and therefore the rotating disc and the bent pipe can be conveniently and perpendicularly arranged; according to the elbow pipe polishing device, the polishing mechanism can conveniently polish the elbow pipe, meanwhile, the tensioning assembly is used for conveniently adjusting the tensioning degree of the abrasive belt so that the elbow pipes of different specifications can be conveniently polished, the application range of the device is widened, and meanwhile compared with manual polishing, the elbow pipe polishing efficiency is improved, and the elbow pipe polishing quality is improved.

The invention discloses a workpiece grinding device and aims to provide a multi-station abrasive belt grinding machine which is high in machining efficiency, capable of conducting multi-level precision grinding at the same time, small in occupied space and convenient to replace an abrasive belt and a control method of the multi-station abrasive belt grinding machine. According to the key points of the technical scheme, through a machining rotary disc and a grinding device arranged in the outer tangent line direction of the machining rotary disc, a positioning device corresponding to the grinding device is arranged on the machining rotary disc, the grinding device can set different parameters according to requirements, automatic switching of multi-stage machining parameters is completed, the adaptability of the technology is improved, and the machining efficiency is improved. Integrated machining of multi-stage precision grinding of materials is achieved, meanwhile, the abrasive belt can be conveniently replaced by adjusting the tightness degree of the grinding abrasive belt, in the grinding machining process of the workpiece, contact between the grinding abrasive belt and the workpiece is achieved through the driving assembly, the overall machining precision is high, the machining effect is good, and the machining efficiency is high. The invention is suitable for the technical field of workpiece polishing devices.

The utility model discloses a tool-free quick-change blade structure, which belongs to the technical field of sanders, solves the problem of inconvenience in blade replacement in the prior art, and adopts the technical scheme that the tool-free quick-change blade structure mainly comprises a cutter head and a blade, the blade is provided with a movable hole and a locking hole, and the diameter of the locking hole is smaller than that of the movable hole. The movable hole is communicated with the locking hole through a connecting section, the connecting section is provided with a limiting piece, a connecting piece is preassembled on the cutter head and can penetrate through the movable hole, and when the blade moves relative to the cutter head, the connecting piece forces the limiting piece to move so that the connecting piece can enter and exit from the locking hole. And the limiting piece resets to limit and lock the connecting piece in the locking hole. The tool-free quick-change blade is mainly used for realizing tool-free quick-change of the blade, and is more convenient to change. The utility model further aims at disclosing the mower, so that the blade is more convenient to replace.

The utility model provides integrated multifunctional polishing equipment. The integrated multifunctional polishing equipment comprises a multi-shaft clamping device, a first rotating disc, a second rotating disc, a first drive and a second drive, wherein the first rotating disc and the second rotating disc are vertical and oppositely arranged; the multiple multi-shaft clamping devices are symmetrically arranged on the periphery of the rotary disc. A plurality of polishing devices are symmetrically arranged on the first rotating disc and the second rotating disc in the circumferential direction; the polishing device on the first rotating disc is a first belt sander; the first driver is arranged on the base and can synchronously drive abrasive belts of the multiple first belt sanders to rotate. And the second driver can drive the rotating disc to rotate, and then the polishing device is driven to rotate at the circumferential position. Through the arrangement of the vertical rotating disc, vertical switching of the grinding devices is achieved, a plurality of multi-shaft clamping devices can be arranged on the periphery of the rotating disc, synchronous grinding machining of a plurality of parts is achieved, the situation that one grinding device works and other grinding devices are idle is avoided, the utilization rate of the grinding devices is greatly increased, the machining efficiency is improved, and large-batch production can be achieved.

The invention relates to the field of numerical control sanding machines for cookware, in particular to a numerical control sanding machine for the top edge of a special-shaped cookware. A numerical control sanding machine for the top edge of a special-shaped cookware comprises a machine tool, a moving and polishing mechanism and a workpiece clamping and rotating mechanism. The moving and polishing mechanism comprises a moving assembly, an adjusting assembly and a polishing assembly. The workpiece clamping and rotating mechanism is provided with an adapter plate, and the cookware is magnetically connected with the adapter plate; a rotary driving motor is arranged at the bottom of the workpiece rotating assembly to drive the cookware to rotate; the workpiece clamping and rotating mechanism is further provided with a transmission belt, and a linear driving motor is arranged at one end of the transmission belt and drives the workpiece rotating assembly to linearly move. According to the numerical control sanding machine for the top edges of the special-shaped cookware at different angles, the sanding belt is provided with a triangular structure capable of being flexibly adjusted, and the sanding belt further has the angle adjusting and tensioning adjusting functions, so that the sanding belt can be better attached to the edge of the cookware.

The invention provides a sanding machine capable of adjusting the grinding pressure, and relates to the technical field of sanding machines, the sanding machine comprises a sanding machine body, a first groove is formed in the sanding machine body, two rotating wheels are arranged in the first groove, a tensioning wheel and a lifting table are arranged between the two rotating wheels, sanding belts are arranged on the rotating wheels, and the sanding belts are arranged on the lifting table. A pressing and pasting plate is arranged on the lifting table, a pressure adjusting assembly is arranged on the pressing and pasting plate, a plurality of metal air conveying hoses are arranged on one side of the pressure adjusting assembly, and a conveying belt is arranged on one side below the two rotating wheels, so that the grinding pressure can be adjusted according to the material condition, and materials with uneven surfaces can be ground; the application range is expanded.

The present invention discloses an uninterrupted automatic sanding production line, which includes a supporting plate-feeding hydraulic roller elevator, a sheet material automatic feeder, a first plate-feeding roller conveyor, a first sander, a second plate-feeding roller conveyor, a rotary flipping integrated machine, a second sander, an outboard roller conveyor, a sheet material receiver, a first hydraulic roller outboard elevator, a second outboard hydraulic roller elevator, and a servo control system for controlling the operating states of each device; the automatic feeder transfers the sheet material onto the first plate-feeding roller conveyor and transports it into the first sander, the second plate-feeding roller conveyor is used to transport the wooden board to the rotary flipping integrated machine, the rotary flipping integrated machine flips the sheet material and transports the flipped wooden board into the second sander, the second sander performs secondary sanding treatment on the other side of the sheet material, and the sheet material receiver is used to stack and level the sheet material and place the leveled sheet material on the first hydraulic roller outboard elevator.

The invention relates to a hand-held power tool device (48a) for a hand-held power tool (50a), in particular a grinding machine (10a), preferably an orbital sander or an eccentric sander, with a housing unit (16a) which has a handle housing (52a) and a drive housing (54a) for receiving a drive unit (14a), wherein the drive housing (54a) defines a drive axis (30a) of the drive unit (14a), and with a damping unit 136a which couples the drive housing (54a) with the handle housing (52a). It is proposed that the drive housing (54a) has a cantilever (138) extending at least radially with respect to the drive axis (30a), on which at least a part (140a) of the damping unit (136a) is arranged.

The utility model provides a hydraulic control two-wheel belt sander and a polishing system, which comprises a driving mechanism, a hydraulic control mechanism and a belt sander, the polishing mechanism comprises abutting wheels and abrasive belts, the abutting wheels and the driving wheels are arranged at intervals, and the abrasive belts are arranged on the abutting wheels and the driving wheels in a sleeving mode; and the force control mechanism comprises a control assembly and an adjusting assembly, the adjusting assembly is connected to the driving mechanism and the polishing mechanism, and the control assembly comprises a force sensor, a displacement sensor and a central control module. Driving force is provided for the polishing process of the polishing mechanism through the driving mechanism, in the process, the force control mechanism can adjust the operation position of the polishing mechanism so that the polishing mechanism can keep high precision and high rigidity of polishing all the time, the force control mechanism can conduct self-adaptive adjustment on the process, and the polishing precision of the polishing mechanism is improved. Therefore, the method has the advantages of high response speed, accuracy and high efficiency. Compared with conventional grinding equipment at the present stage, the grinding equipment has the remarkable advantages in the aspects of grinding quality, the regulation and control process, the machining efficiency and the like.

A variable flow sand mill. The invention forms multiple forms of vortexes in the mill by scientifically combining different structures of dispersing discs. When the dispersing discs run at high speed in the mill, the guide flow slope of the first dispersing disc is downward, giving the material a vertical downward and horizontal outward component force; the guide flow slope of the second dispersing disc is upward, giving the material a vertical upward and horizontal outward component force, the first dispersing disc and the second dispersing disc constitute the driving force of the large circulation in the mill; the third dispersing disc is affected by the isolation column, so that the material inside the isolation column moves upward and towards the central axis, and the material is bounced when colliding with the shaft sleeve; the material outside the isolation column moves upward and towards the inner wall of the cylinder, and the material is bounced when colliding with the inner wall, thereby forming vortex small circulations of different sizes inside and outside, multiple vortex small circulations in the mill cooperate with the overall large circulation, greatly increasing the frequency of collisions between particles in the material, and improving the grinding efficiency.

The invention provides a table top thick and flat sanding mechanism and solid wood processing equipment, and belongs to the technical field of wood sanding, the table top thick and flat sanding mechanism specifically comprises a driving roller, a first driven roller, an adhesive tape, a second driven roller, an abrasive belt and a position conversion structure, the first driven roller and the second driven roller are arranged in parallel at intervals, the adhesive tape is wound on the driving roller and the first driven roller, and the abrasive belt is arranged on the position conversion structure. The abrasive belt is wound on the driving roller and the second driven roller, the position conversion structure comprises a quarter arc rack, a sliding seat, a gear and a first driver, one end of the quarter arc rack vertically corresponds to the position of the first driven roller in parallel, the other end of the quarter arc rack horizontally corresponds to the position of the driving roller in parallel, and the sliding seat slides on the quarter arc rack in a limited mode; the gear is rotationally arranged on the sliding seat and is in meshed connection with the hobbing on the quarter arc rack, the first driven roller is rotationally arranged on the sliding seat, and the first driver is in transmission connection with the gear. Through deformation of the sanding mechanism, the functions of accurate grinding and rough grinding are achieved, and the equipment size is reduced.

The utility model belongs to the technical field of plate processing equipment, and particularly relates to a sanding machine for plate processing, which comprises a base. First transmission mechanisms are arranged at the two ends of the interior of the base correspondingly, and a sanding mechanism is installed between the first transmission mechanisms. By arranging the first transmission mechanism and the sanding mechanism, when a plate is sanded and processed and enters the sanding mechanism, a first motor works to drive a first two-way screw rod to rotate, and a sliding plate is meshed with the first two-way screw rod, so that the sliding plate relatively moves under the limitation of a first sliding groove; the sanding mechanism in the middle is driven by the movement of the sliding plate to attach a plate, the sanding motor is started to drive the driving roller to rotate, the sanding belts on the driving roller and the driven roller are matched with the driven roller to carry out sanding processing on the plate, and the two sides of the plate are conveniently processed at the same time by arranging the two groups of mirroring sanding mechanisms; the sanding machining efficiency is greatly improved, and meanwhile sanding damage caused by unevenness of the plates is prevented.

The utility model relates to the field of plate processing, and discloses a plate double-face sander which comprises a machine body and a mounting frame, supporting plates are fixedly connected to the front side and the rear side of openings in the two sides of the machine body, an electric conveying belt is arranged between the two supporting plates located on the same side and the machine body, and an upper motor is fixedly connected to the front side of the mounting frame. The double-sided sanding device has the following advantages and effects that the distance between the upper sanding roller and the lower sanding roller can be adjusted so that double-sided sanding can be carried out on plates with different thicknesses, the practicability and universality of the device are improved, meanwhile, sundries such as wood chips attached to the lower sanding roller can be scraped off, it is guaranteed that the surfaces of the upper sanding roller and the lower sanding roller are clean, and the production efficiency is improved. The board double-face sanding device is simple in structure and convenient to use, prevents sundries from being attached to affect the board double-face sanding effect, can effectively absorb and clean chippings and dust generated during board double-face sanding, prevents the working environment from being polluted, and guarantees personnel health.

The present invention relates broadly to pneumatic tools, such as a sander, that provide an optimum output speed and has significant stall torque to reduce the risk of the tool from stalling during use. The tool includes a coupled gear set that drives an output accessory, such as an abrasive pad, at an optimum speed without loss of power or power reduction, and with an amplified stall torque. The coupled gear set may include a first gear set that functions as a speed reducer, and a second gear set that functions as a speed increaser.

The utility model discloses a polishing belt sander, and relates to the technical field of polishing belt sanders. The polishing device comprises a workbench, a side plate is arranged on the rear side of the top of the workbench, a polishing machine is arranged on the front side of the side plate, a belt is arranged in the polishing machine, an upper movable block and a lower movable block which are symmetrical are arranged in the belt, and a threaded hole and a through hole are formed in the left side and the right side of the interior of each movable block respectively. And a loosening assembly with a lifting function is arranged in the side plate. The loosening assembly drives the movable block to move upwards and downwards respectively till the upper end enables the belt to be located in the containing groove, the belt loses tension through stretching of the movable block, and then the belt can be taken out and replaced with a new belt. The problems that a grinding wheel or a driving motor needs to be detached from the machining position of a machine tool for replacement of a belt, the working time is prolonged, and the production efficiency is reduced are solved, a cleaning assembly is driven to clean dust on the top of a transmission mechanism, and the dust is prevented from falling into the belt.

The utility model discloses a multi-angle adjusting type sanding machine which comprises a bottom plate, a mounting base is mounted on one side of the outer wall of the top of the bottom plate through bolts, a motor groove is formed in the mounting base, a motor is mounted in the motor groove through bolts, and a rotating groove is formed in one side of the interior of the mounting base; the output end of the motor is provided with a rotating rod extending into the rotating groove through a coupler, the top of the rotating groove is movably provided with a rotating rod extending out of the mounting base through a bearing, the outer walls of the rotating rod and the rotating rod are provided with transmission wheels through bolts, and the outer walls of the transmission wheels are sleeved with transmission belts. By means of the arranged motor, when the motor is started, the motor can drive a rotating rod, a rotating rod, a transmission wheel and a transmission belt to drive a rotating disc to rotate, so that the structure can be effectively adjusted for a long time, and by means of the arrangement of a servo motor, a rotating roller and a grinding belt, the device can grind materials more perfectly.