132 results about "Bench grinder" patented technology

The utility model discloses a single-station high-speed grinding machine which comprises a base, a mounting plate is fixedly arranged at the top of the base, a rotating shaft is rotatably arranged in the mounting plate, a grinding wheel is arranged at one end of the rotating shaft, the other end of the rotating shaft is connected with a motor, and a protective cover is sleeved outside the grinding wheel. A purification box and a fan are installed at the top of the base, the output end of the fan is communicated with the purification box, the input end of the fan is connected with a bent pipe, a plurality of extension pipes are installed on the inner side of the bent pipe, and the extension pipes are fixed to the side wall of the protective cover in a penetrating mode. The utility model relates to the technical field of grinding machines, the grinding machine can introduce granular sweeps and flue gas into the purification box through the fan, the granular sweeps can be retained in a cavity on the right side of the purification box through filtration of a filter screen in the purification box, and gas with the flue gas can be purified through adsorption of activated carbon, so that the purification effect of the grinding machine is improved, and the service life of the grinding machine is prolonged. And the working environment of the grinding machine is ensured.

The utility model relates to the technical field of grinding wheel machines, and discloses a grinding wheel machine of a quick grinding wheel replacing mechanism, which comprises a base, and a grinding wheel machine body is fixedly mounted on the top surface of the base. By arranging the disassembling mechanism, a first supporting ring, a first clamping ring and a second supporting ring are arranged for bolt installation, an internal grinding wheel disc is disassembled, then the interior of the grinding machine is cleaned, a grinding wheel is rapidly replaced, the time and energy needed by an operator for replacing the grinding wheel can be shortened, and the labor cost is reduced; a reloading mechanism is arranged, a second annular plate and a second supporting plate are mounted through a first U-shaped plate, and meanwhile, a second blade is mounted through threads, so that a grinding wheel can be quickly disassembled and reloaded, and the grinding machine can more flexibly adapt to different machining requirements; and therefore, the angle of the protection device can be conveniently adjusted, and sparks are prevented from splashing to harm the health of operators.

1. Name of the designed product: polishing workbench (portable - element group) 2. Use of the designed product: workbench for polishing model part element group 3. Design points of the designed product: in shape 4. Picture or photo that best indicates the design points: combination of use state figure 1.

The utility model relates to an automatic sand dressing device of grinding machine, including the machine case and sand dressing mechanism, the bottom side of machine case installs the grinding wheel, and the grinding wheel rotates through the drive of driving device, sand dressing mechanism installs in the bottom other side of machine case, and the working end of sand dressing mechanism installs sand dressing subassembly, sand dressing subassembly is matched with the working grinding surface of grinding wheel, the inside of machine case is equipped with linear conveying installation cavity, and linear conveying device of linear transmission connection with sand dressing mechanism is installed in linear conveying installation cavity. This automatic sand dressing device can replace artificial to complete the dressing of grinding wheel, and the working efficiency is high, because sand dressing subassembly is matched with the working grinding surface of grinding wheel, and the dressing accuracy is also high, prolongs the service life of grinding wheel, avoids the secondary wear of artificial manual dressing.

The utility model relates to the technical field of cutter edging, in particular to cutter edging machining equipment which comprises a grinding machine body, grinding wheels, notch protective covers, a plurality of supporting plates and a protective assembly, the grinding machine body is provided with the two grinding wheels with different mesh numbers, the notch protective covers are arranged on the outer sides of the grinding wheels, and the supporting plates are arranged on the protective assembly. The supporting plates are connected to the two ends of the notch protective cover, the protective assembly is connected to the notch protective cover and comprises a limiting block, a cutting blade and an adjusting assembly, and the adjusting assembly comprises an adjusting rod, a moving block and a steering assembly. According to the polishing device, the limiting block is located on the polishing grinding wheel, articles accidentally drawn into the polishing grinding wheel are blocked through the limiting block, the articles are cut through the cutting blade so that the articles can be prevented from being wound by the polishing grinding wheel, and meanwhile the position and the angle of the limiting block can be adjusted according to synchronous steering of the polishing grinding wheel; and the protection effect can be achieved when the grinding wheel rotates forwards and backwards.

The utility model relates to the technical field of grinding machine, especially to a kind of anti-sputtering floor grinding machine.The technical scheme thereof includes support seat and shell, the support seat upper surface is fixedly installed with shell, the shell outer surface both sides position is fixedly installed with protective cover, two the protective cover inside is provided with grinding wheel, two the protective cover front surface is provided with opening, two the protective cover front side is located in opening position is set from top to bottom with two air curtain cover, the support seat inside is fixedly installed with exhaust fan, the exhaust fan input is fixedly connected with dust filter, the dust filter tail end is fixedly connected with dust suction pipe, the dust suction pipe tail end is fixedly connected with dust suction connecting pipe.The utility model can effectively avoid particulate matter splashing during the process of floor grinding machine grinding workpiece, and simultaneously play the role of dust removal, thereby avoiding pollution working environment, also avoiding particulate matter flying into the eye of operator to cause discomfort and harm.

The utility model discloses a grinding machine with dust collector, solved the grinding machine of prior art without dust collection function, and the problem that workpiece is easy to appear sliding in polishing process. The utility model discloses a workbench still includes the grinding machine of being located at workbench, the protective cover of being located at the both ends of grinding machine, dust collection mechanism that is located at the bottom of workbench and is connected with two protective cover and dust collection mechanism that is located in workbench and is connected for collecting the dust collection mechanism of polishing debris, is equipped with the clamping mechanism for clamping workpiece on workbench. The utility model can take out the debris in the protective cover through dust collection mechanism, and polishing debris is transported to the dust collection mechanism and is collected, thereby facilitating subsequent debris processing, and the clamping mechanism can conveniently fix the polishing workpiece, thereby preventing the workpiece from sliding during polishing, which can improve the polishing accuracy of the workpiece.

The utility model discloses a saw blade relief angle machining device which comprises a support and a grinding machine, a clamping assembly is installed on the support, the clamping assembly comprises a supporting rod and a clamping sleeve, a moving assembly is installed on the support and comprises a guide rail and a first motor, a rotating assembly is installed at the bottom of the support, and the rotating assembly is connected with the supporting rod. The rotating assembly comprises a supporting sleeve and a second motor, the supporting sleeve is provided with a positioning assembly, the positioning assembly comprises a worm and an electromagnet, and the supporting rod is provided with a lifting assembly. According to the saw blade relief angle machining device, the third motor can be in threaded fit with the threaded sleeve through the threaded rod until the threaded sleeve is extruded to the button, the third motor is turned off, and the positioning assembly is turned off; when the saw blade is clamped, the clamping sleeve is stopped from being pressed, the clamping firmness of the saw blade is guaranteed, the saw blade is prevented from loosening in the machining process, the safe machining work of the saw blade is guaranteed, the saw blade is prevented from being damaged due to too large clamping force, the safety of the saw blade is guaranteed, and the device is suitable for sharpening the rear angle of the saw blade.

An assembly for guarding a grinding wheel of a bench grinder and a method for manufacturing an assembly for guarding a grinding wheel of a bench grinder are provided. The assembly includes a fixed guard, a sliding guard, and a locking device. The fixed guard is mounted around the grinding wheel and has an opening that provides access to the grinding wheel. The sliding guard is disposed over the fixed guard and designed to slide over the fixed guard to cover or uncover the opening. The locking device is designed to fix a position of the sliding guard relative to the fixed guard. The position of the sliding guard spans from a first position, which corresponds to complete covering of the opening of the fixed guard by the sliding guard, to a second position, which corresponds to complete uncovering of the opening of the fixed guard by the sliding guard.

The utility model provides an online trimming mechanism of humanoid robot joint lead screw nut machining equipment, and belongs to the technical field of machinery. The problem of how to improve the working efficiency of equipment is solved. In the online trimming mechanism of the humanoid robot joint lead screw nut machining equipment, the joint lead screw nut machining equipment comprises a rack, a driving piece with the driving end capable of rotating is arranged on the rack in a sliding mode in the transverse direction, a columnar cutter is fixed to the driving end of the driving piece in the transverse direction, and the online trimming mechanism comprises a grinding wheel. A motor capable of sliding in the longitudinal direction is further arranged on the rack, a grinding wheel is fixed to the driving end of the motor, and the outer edge of the grinding wheel is opposite to the outer side wall of the cutter. According to the online trimming mechanism of the humanoid robot joint lead screw nut machining equipment, the working efficiency of the online trimming mechanism can be guaranteed.

A kind of automatic runner grinding device, belong to the technical field of runner grinding, including grinding machine, grinding wheel piece, positioning block, slide and fixed frame.The front of grinding wheel piece is equipped with positioning block.Positioning block is equipped with positioning block through hole, and the edge of grinding wheel piece extends from positioning block through hole.Positioning block is fixed on the edge of slide.Slide is equipped with sliding block.Fixed frame is fixed on the lower sliding block, and fixed frame is used to fix product.The device moves sliding block to push the product on fixed frame to approach grinding wheel piece, and the position of product runner is opposite to grinding wheel piece, along with the continuous movement of fixed frame, runner is ground using grinding wheel, and the runner residue on product is continuously ground until fixed frame collides with positioning block, and runner residue is completely ground, so that the phenomenon of easy breakage of current thermosetting product hand-broken runner, product burr, even damage to product body can be solved, the quality of product is avoided to be affected, and cost is reduced.

The invention relates to the technical field of centerless grinding machines, in particular to a centerless grinding machine grinding wheel high-steady-state finishing control method which can stably finish a high-precision grinding wheel in the dynamic process, a machine tool is provided with an MPM dynamic balancing instrument and adopts a marble lathe bed, and a three-phase asynchronous motor or a spindle motor is selected as a grinding wheel motor. A servo motor with the rated rotating speed of 3000r / min is selected as a diamond roller motor; in the process of dressing the grinding wheel by the diamond roller, the same-direction dressing mode that the linear velocity value VRlr when the spindle of the diamond roller rotates divided by the linear velocity value VGW when the spindle of the grinding wheel rotates is a fixed value qd is adopted; the dressing feeding of the grinding wheel dresser is controlled by a U shaft, and a fixed grinding wheel dressing amount is carried out each time of dressing.

1. Name of the designed product: desk type tungsten electrode point grinder (precision). 2. Use of the designed product: for grinding tungsten needle or electrode for argon arc welding. 3. Design points of the designed product: in the combination of shape and pattern. 4. Picture or photo best indicating the design points: perspective view 1.

The application discloses a kind of processing technology of power two guide inner machine cabinet front section welding assembly, belong to aerospace parts processing technical field.Aiming at the problem that assembly rigidity is poor, processing is easy to deform, and it is difficult to guarantee precision size, the process realizes precision control by optimizing route, improving clamping, configuring special tooling and relaxing unnecessary tolerance.Process route is: 0 is matched→10 vacuum brazing→15 bench grinder→20 numerical control machine processing→30 bench work→40 numerical control machine processing→42 numerical control machine finishing→50 numerical control milling processing→60 bench work→70 electric spark grinding→80 ultrasonic cleaning→85 numerical control machine processing→90 bench work→100 inspection→110 electric arc ion plating→120 inspection→130 cleaning→140 packaging.15, 42, 85 new process, optimize the clamping mode of each core process, configure fixed cover plate and special gauge, reasonably adjust tolerance range, and the qualified rate of part processing can be effectively improved.

The utility model discloses a multi-rail grinding machine for machining disc and sleeve type workpieces, which belongs to the technical field of grinding or polishing machine tools and devices and comprises a machine body, a linear guide rail, a workpiece spindle box, a grinding carriage, a cooling system and a protective mounting interface. The bed body is of a rigid foundation supporting structure, rectangular openings and mounting holes are formed in the bottom, mounting faces and rails are arranged on the top, and driving components and wires are contained in the bed body. The linear guide rails comprise a set of X-axis guide rails and two sets of Y-axis guide rails, the X-axis guide rails are provided with the workpiece spindle box to clamp workpieces and drive the workpieces to rotate, and the two sets of Y-axis guide rails bear the inner grinding wheel mechanism and the outer grinding wheel mechanism respectively. The inner grinding wheel mechanism is of a three-spindle rotating disc type rotation structure, and switching between a grinding station and a finishing station can be achieved. The outer grinding wheel mechanism comprises a Z-direction transmission mechanism, a grinding wheel is provided with two adjacent cutting working faces, and an included angle is matched with a workpiece machining face. The machine body is further provided with a grinding wheel dressing device, all the guide rails move independently and cooperatively form a high-precision grinding system, and the machining efficiency and precision are improved.

1. The name of the design product: Household grinding machine (LT-775). 2. The use of the design product: For grinding workpieces of various materials. 3. The design points of the design product: In shape. 4. The picture or photo that best indicates the design points: Perspective view.

1. Name of the product in this design: Grinding wheel machine. 2. Purpose of this design: For use in grinding machines. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The invention relates to the technical field of grinding machines, and discloses a pneumatic grinding machine dustproof mechanism which comprises a grinding machine body, an air inlet pipe, a pressing plate, a transmission rod and a grinding wheel, the end, close to the transmission rod, of the grinding machine body is connected with a dismounting assembly, the other end of the dismounting assembly is connected with an air draft assembly, and the output end of the air draft assembly is connected with a filtering assembly; and the other end of the filtering assembly is connected with an air blowing assembly. According to the dustproof mechanism of the pneumatic grinding machine, the dismounting assembly is arranged between the grinding machine body and the grinding wheel, so that when maintenance is needed, parts such as an air draft assembly and the like can be dismounted from the grinding machine body; according to the grinding machine, the air draft assembly is arranged between the grinding machine body and the grinding wheel, and the air draft assembly is connected with the transmission rod, so that a negative pressure area can be formed above a workpiece while the transmission rod drives the grinding wheel to rotate to grind the workpiece, dust generated during grinding of the grinding wheel can be absorbed, and the influence on the environment and workers is reduced.

The present application relates to a railway rail polishing device. The traditional post-welding rail polishing mainly relies on manual operation of a hand-held grinder, which is time-consuming and laborious, and the operating environment is poor, which can easily cause occupational diseases of workers. The present application comprises two fixed arms, which are symmetrically wrapped on both sides of the rail, and the top of the two fixed arms are hingedly connected to each other. The side of the fixed arm in contact with the rail is provided with a containing groove. A position limiter is sleeved on the top hinged portion of the fixed arm, and a power assembly is arranged on the position limiter. The power assembly is engaged with the polishing belt. The polishing belt is annular, and the polishing belt is wrapped around the outer periphery of the fixed arm and the position limiter, and is simultaneously arranged in the containing groove on the inner side of the fixed arm and tightly contacts the rail. A plurality of abutting assemblies are arranged in the containing groove of the fixed arm and abut the side of the polishing belt away from the rail. The present application not only saves labor consumption, but also realizes automatic polishing and dust reduction, thereby ensuring the health of the polishing environment and avoiding harm to workers.

A kind of plugging device and method for frost heaving leakage of large-span building roof in cold region, comprising shell, barrier component, baffle, electric grinder, electric telescopic rod, electric moving table and collection tank;Electric moving table, electric control lifting rod, electric grinder, baffle and collection tank are arranged in shell, fixed part of electric moving table is installed at the bottom of shell, electric grinder is installed on the movable part of electric telescopic rod, collection tank is arranged on the inner wall of shell and is adjacent to electric grinder, the upper part of electric grinder is provided with baffle, one side of baffle is rotatably arranged on the inner wall of shell, the other side of baffle can be placed on the top of collection tank, barrier component for grouting is movably arranged at the opening of shell.Method steps: device installation;Concrete crack polishing;Concrete crack cleaning;Crack grouting and material setting.This application can be used for the repair of roof frost heaving leakage, improve construction efficiency.

The utility model discloses an efficient point hole grinding drill bit machine, which belongs to the technical field of grinding mills and is characterized by comprising a machine body, a rotary driving source is arranged on the machine body, an output end of the rotary driving source is connected with a grinding wheel, and a cross carriage is arranged on the machine body and positioned on one side of the grinding wheel. A grinding base used for clamping a drill bit is installed on the cross carriage, a positioning protrusion is arranged at the bottom of the grinding base, a containing groove is formed in the cross carriage, an elastic damping sleeve is arranged in the containing groove, the cross section of the elastic damping sleeve is of a V-shaped structure, an opening of the V-shaped structure faces the inner side wall of the containing groove, and the positioning protrusion is inserted into the containing groove. And the elastic damping sleeve is located between the outer side wall of the positioning protrusion and the inner wall of the containing groove, the outer side wall of the positioning protrusion is attached to the inner side wall of the elastic damping sleeve, the point hole grinding drill bit machine can reduce the adverse effect of external force and vibration on the grinding base in the grinding process, and then the stability of the grinding base is improved.

The utility model provides a high and low temperature alternating environment wear simulation experiment machine which comprises a rack, and a heating mechanism, a wear mechanism, a blowing cooling mechanism and a clamping mechanism which are arranged on the rack, and the heating mechanism comprises an electromagnetic induction heater arranged on the rack; the abrasion mechanism comprises a grinding machine installed on the machine frame and a first driving mechanism connected with the grinding machine to drive the grinding machine to move up and down, the clamping mechanism comprises a clamp installed on the machine frame and a second driving mechanism driving the clamp to move, and the blowing cooling mechanism is installed on the machine frame and used for conducting blowing cooling on grid sections on the clamp. The high and low temperature alternating environment abrasion simulation experiment machine can consider factors such as reciprocating heating and cooling, temperature monitoring, contact load, mechanical abrasion and cyclic experiments, and can reduce actual working conditions of abrasion of quick-wear parts in metallurgical processes such as sintering and pelletizing in a high-precision manner, so that the influence effect of a coating technology on the service life of a grid section is verified.

This invention relates to the field of gear processing technology, specifically a gear chamfering machine tool, including a base and a rotating fixture mounted on the base for fixing the workpiece. A servo motor is mounted on the base, and a grinding wheel is mounted on the output shaft of the servo motor. The machine tool also includes: a driven shaft, fixedly connected to the grinding wheel, with one end rotatably connected to the output shaft of the servo motor; and a connecting member, positioned between the driven shaft and the servo motor drive shaft. This device can track the deflection amplitude of the grinding wheel in real time through a limit monitoring component. When abnormal fluctuation is detected, a two-stage safety response mechanism is triggered: firstly, the main drive connection is quickly disconnected to block the transmission of abnormal torque; then, a continuously rotating drive ring forms a friction transmission with the grinding wheel docking component, actively guiding the grinding wheel to deflect along a safe trajectory and detach from the workpiece, thereby reducing the risk of collision between the grinding wheel and the workpiece due to sudden malfunctions in traditional machine tools.

The utility model discloses a grinding machine with an adjustable protective cover, which relates to the technical field of grinding machines and comprises a grinding machine component and a protective cover component, device frame components are vertically mounted on the left side and the right side of the front end of the grinding machine component, and the protective cover component is erected at the power output end of the grinding machine component. An adjusting frame assembly is connected to the middle of the side, away from the grinding machine assembly, of the protective cover assembly. According to the grinding machine with the adjustable protective cover, through the arrangement of the structure of the protective cover assembly, it can be effectively guaranteed that the grinding wheel body has enough structural protection performance in the high-speed rotating process, unnecessary structural damage to operators is avoided, meanwhile, flexible structural adjustment can be made within a certain range, and the grinding wheel body is more convenient to use. The device frame assembly can provide lifting adjustment within a certain range for the grinding machine assembly and meanwhile guarantee the stability of structural operation, and the adjusting frame assembly can cooperate with the device frame assembly to conduct structural adjustment and adaptation while guaranteeing the structural stability of the protective cover assembly.

The utility model discloses a special grinding machine for roller ball base surface end face. Including sand wheel mechanism, finishing mechanism, work piece feeding mechanism, the sand wheel mechanism, finishing mechanism, work piece feeding mechanism are provided with on the workstation surface, sand wheel mechanism is opposite to work piece feeding mechanism and is provided, and the sand wheel mechanism one side is provided with finishing mechanism, sand wheel mechanism includes the grinding head sliding table, sand wheel, and the grinding head sliding table rotatably is provided on the workstation surface, and sand wheel sets up on the grinding head sliding table, and sand wheel is bowl -shaped structure, finishing mechanism includes the diamond roller trimmer, and the diamond roller trimmer movably is provided on the workstation surface, and the diamond roller trimmer is located sand wheel one side, and the diamond roller trimmer finishing surface is located on the rotation track of sand wheel, and the diamond roller trimmer finishing surface is contacted with the bowl -shaped inner wall of sand wheel, work piece feeding mechanism includes the diaphragm chuck, and the diaphragm chuck movably is provided on the workstation surface, and the clamping station of diaphragm chuck front end is opposite to the bowl -shaped inner wall of sand wheel and is provided. The utility model guarantees the machining accuracy of work piece ball base surface.

The application belongs to the technical field of coupling processing, and particularly discloses a rough grinding treatment equipment for corrosion prevention of sucker rod couplings, which comprises a base, a protective shell, a controller and a grinding wheel polishing mechanism arranged on the base, and a feeding mechanism, the feeding mechanism comprises a second driving seat slidingly arranged on the base, an installation cylinder is arranged on the second driving seat through a mounting plate, two operation windows are symmetrically arranged on the cylinder wall of the installation cylinder, a rotating shaft is rotatably arranged in the installation cylinder, a turnover driving assembly is arranged on the second driving seat, and a clamping mechanism is arranged on one side of the rotating shaft. The installation cylinder with two operation windows, the grinding wheel polishing mechanism and the observation plate correspond to the layout of different windows respectively, so that the dangerous polishing operation and personnel inspection and measurement are isolated in space, the risk of personnel contacting the rotating grinding wheel is fundamentally eliminated, the grinding wheel mechanism does not need to be repeatedly started and stopped or moved, and the overall operation rhythm is optimized.

The utility model relates to the technical field of musical instrument manufacturing equipment, in particular to an environment-friendly dust removal type grinding machine for musical instrument production, which comprises a grinding machine, a dust suction pipe and the like. A mounting plate is connected to the front side of the grinding machine, an opening ring frame is connected into the mounting plate, a filter kit is rotatably connected into the opening ring frame, through holes are formed in the front side and the rear side of the opening ring frame, one end of a dust suction pipe is communicated with the through hole in the rear side of the opening ring frame, the other end of the dust suction pipe is communicated with the bottom of the dust accumulation hopper, and an air blower is communicated with the through hole in the front side of the opening ring frame. By means of continuous rotation of the filtering suite, the filtering face is continuously updated and changed, meanwhile, attached chippings are forcefully purged through reverse high-pressure airflow, the chippings cannot stay on the filtering structure through a dynamic cleaning mechanism, and the clean state of the filtering face is kept all the time.

The invention discloses a multi-rail grinding machine for machining disc and sleeve type workpieces, which belongs to the technical field of grinding or polishing machine tools and devices and comprises a machine body, a linear guide rail, a workpiece spindle box, a grinding carriage, a cooling system and a protective mounting interface. The bed body is of a rigid foundation supporting structure, rectangular openings and mounting holes are formed in the bottom, mounting faces and rails are arranged on the top, and driving components and wires are contained in the bed body. The linear guide rails comprise a set of X-axis guide rails and two sets of Y-axis guide rails, the X-axis guide rails are provided with the workpiece spindle box to clamp workpieces and drive the workpieces to rotate, and the two sets of Y-axis guide rails bear the inner grinding wheel mechanism and the outer grinding wheel mechanism respectively. The inner grinding wheel mechanism is of a three-spindle rotating disc type rotation structure, and switching between a grinding station and a finishing station can be achieved. The outer grinding wheel mechanism comprises a Z-direction transmission mechanism, a grinding wheel is provided with two adjacent cutting working faces, and an included angle is matched with a workpiece machining face. The machine body is further provided with a grinding wheel dressing device, all the guide rails move independently and cooperatively form a high-precision grinding system, and the machining efficiency and precision are improved.

The utility model relates to abrasive wheel machine technical field especially relates to a high strength abrasive wheel machine with water cooling, its technical scheme includes base, abrasive wheel, protective cover and rotating motor, the inside hollow of rotating motor rotor shaft, one end of rotating motor rotor shaft is connected with cold water pipe through swivel joint rotation, the outer fixed surface of rotating motor rotor shaft is installed with abrasive wheel, and abrasive wheel and cold water pipe are located rotating motor both sides respectively, the outer surface of abrasive wheel is arranged with a plurality of heat dissipation holes in annular array equidistance, and heat dissipation hole extends to the inner wall of abrasive wheel, the outer surface of rotating motor rotor shaft is located at the position of the inside of abrasive wheel and is provided with annular groove, the utility model is convenient for to motor, abrasive wheel and workpiece carry out water cooling cooling simultaneously, guarantees the stable performance of workpiece, has prolonged the service life of abrasive wheel and motor, has reduced the equipment failure risk of high temperature simultaneously.