36results about How to "Avoid Grinding Burns" patented technology

The invention discloses a manufacturing method of an electroplated grinding wheel of an ordered structure. The method includes: adopting a pulse laser beam to process a fine spiral groove with the pitch of hundreds of micrometers and the notch size of dozens of micrometers in the working surface of the outer annulus of a grinding wheel base body made of metal, filling the groove with epoxy resin, and enabling the metal and the epoxy resin on the working surface of the outer annulus of the grinding wheel base body to be in spiral regularly-spaced layout; then electroplating the working surface of the outer annulus of the grinding wheel base body with abrasive grains by adopting an electroplating method. Since the groove is filled with the non-conductive epoxy resin, the region cannot be electroplated with the abrasive grains. By the steps, the electroplated grinding wheel with the abrasive grain layer and the epoxy resin being in spiral regularly-spaced layout can be obtained. The manufactured electroplated grinding wheel of the ordered structure is in favor of solving the problems that the grinding wheel is blocked easily during grinding and grinding fluid cannot enter the grinding region easily, workpieces can be prevented from being burnt, and the grinding quality is improved.

The invention discloses an internal cooling grinding wheel. A grinding wheel body is of a bowl-shaped structure, a cutter handle is arranged on the grinding wheel body, grinding particles are distributed below the cavity wall of the grinding wheel body evenly, a cooling liquid cavity is formed in the cutter handle end of the grinding wheel body and sealed by a round plate, and a cooling liquid injection hole is formed in the round plate. A center through hole is formed in the cutter handle and through the center cavity of the grinding wheel body. Cooling liquid channels are distributed in the cavity wall of the grinding wheel body evenly, inlets of the cooling liquid channels are positioned in the cooling liquid cavity of the grinding wheel body, and jet ports of the cooling liquid channels are positioned between two adjacent grinding particles. The internal cooling grinding wheel has the advantages that by means of a supercharging device, cooling liquid is injected through the injection hole and jetted out through the positions between two adjacent grinding particles by means of pressure, gravity and centrifugal force during rotation of the grinding wheel, the temperature of grinding regions is decreased remarkably, grinding burn is avoided, full cooling is achieved, and therefore, the internal cooling grinding wheel is a practical and efficient grinding tool.

The invention discloses an ultrasonic vibration assisted grinding fluid microchannel infiltrated nano-fluid trace lubrication and grinding device and aims at solving the problem that undeformed abrasive dust thickness has larger influence on the grinding process in the prior art. The ultrasonic vibration assisted grinding fluid microchannel infiltrated nano-fluid trace lubrication and grinding device has the beneficial effects that the lubrication state of single abrasive grains when a material is removed in the grinding process is fully considered from microscopic, and the effect of ultrasonic vibration assisted grinding in improving the cooling and lubrication effects of nano-fluid trace lubrication is effectively realized. According to the technical scheme, the device comprises an ultrasonic vibration mechanism capable of regulating the position of an ultrasonic vibrator space, a nano-fluid trace lubrication and grinding mechanism and a grinding force measurement mechanism; the ultrasonic vibration mechanism is arranged on a workbench; the nano-fluid trace lubrication and grinding mechanism is arranged above a workpiece fixing table; the grinding force measurement mechanism comprises a dynamometer and a grinding force controller which is connected with the dynamometer; and the dynamometer is arranged at the bottom of the ultrasonic vibration mechanism.

The invention discloses a manufacturing method of a slewing bearing, belongs to the field of production of slewing bearings, and solves the problems of short service life, weaker quality stability and low machining production efficiency of the traditional slewing bearings. The manufacturing method of the slewing bearing comprises a rough machining step, a lineation step, a hole boring step, a semi-finish turning step, a tempering step, a finish machining step, a roller way finish machining step and an assembly step, wherein the tempering step of the inner surface of a roller way is to use a nozzle for aligning to the inner surface of the roller way to spray quenching liquid and immediately stop spraying when rotating by 360-n degrees, and the roller way finish machining step is to grind the inner surface of the roller way by adopting turning to replace grinding. The manufacturing method of the slewing bearing can effectively improve the production efficiency, and manufactures the slewing bearings with stable quality, high precision and long service life.

The invention relates to a magnetic nanoparticle jet flow and magnetic force working table coupling oil film forming process and a magnetic nanoparticle jet flow and magnetic force working table coupling oil film forming device. The magnetic nanoparticle jet flow and magnetic force working table coupling oil film forming device includes a magnetic force working table onto which a work piece is attached; a grinding wheel is arranged on the processing position of the work piece, a nozzle is arranged on the position of the grinding wheel cover, and the position of the grinding wheel cover is matched with the work piece; the nozzle is connected with a magnetic nanofluid liquid supply device through a magnetic nanofluid delivery pipe, and connected with an air compressor through an air compressor delivery pipe; the magnetic nanofluid and compressed air formed into a three-phase flow spray after being mixed and accelerated in the nozzle, wherein the three-phase flow spray is a mixed spray of the compressed air, the magnetic nanoparticles and grinding-fluid-based oil particles; and the three-phase flow spray enters the grinding area between the work piece and the grinding wheel, the magnetic force working table is in magnetic coupling with the three-phase flow spray, and an oil film is formed on the surface of the work piece. The magnetic nanoparticle jet flow and magnetic force working table coupling oil film forming device delivers the magnetic nanoparticle fluid to the nozzle and forms a lubricating oil film on the surface of the work piece of the magnetic worktable, so that the maximum cooling and lubricating of a grinding processing area is achieved.

In a grinding wheel comprising a disc-like core member and a ring-shape grinding wheel layer wherein superabrasive grains selected from cubic boron nitride particles and diamond particles are contained together with aggregates in a bonding material, the aggregates are made of porous ceramics particles and have an average particle size which is in a range of 70% to 150% relative to the average particle size of the superabrasive grains, and bridges made of the bonding material are formed between the aggregates adjoining to one another or between the aggregates and the superabrasive grains adjoining to the aggregates.

The invention discloses a combined type axial rotating pulsating heat pipe grinding wheel. The combined type axial rotating pulsating heat pipe grinding wheel is composed of a handle body and a plurality of grinding wheel section blocks capable of being fixed to the handle body in a combination mode; working layers with abrasive particles are arranged on the outer surfaces of the lower ends of thegrinding wheel section blocks, heat exchange fins are arranged on the upper parts of the grinding wheel section blocks, and closed single loop pulsating heat pipe flow channels are arranged in the grinding wheel section blocks; vacuumizing liquid injecting holes are formed in the single loop pulsating heat pipe flow channels, plug heads are sealed on the vacuumizing liquid injecting holes and canbe moved away from the vacuumizing liquid injecting holes, and thus the single loop pulsating heat pipe flow channels are connected with a vacuumizing device or a liquid injecting device through thevacuumizing liquid injecting holes; and the vacuumizing device can vacuumize the single loop pulsating heat pipe flow channels, and the liquid injecting device can inject preset working mediums into the single loop pulsating heat pipe flow channels. The combined type axial rotating pulsating heat pipe grinding wheel has the advantages of efficiently strengthening and channeling the grinding heat generated by grinding arc areas, reducing the grinding temperature and improving the grinding quality.

The invention discloses a vibration grinding steel rail grinding method, and belongs to the technical field of grinding. The method comprises the following steps that a, vibration is generated when a grinding wheel grinds a steel rail to form vibration grinding; b, a vibration generator is arranged at any position of a grinding wheel-main shaft system, and the vibration form, the vibration power, the amplitude frequency and the like are adjusted according to the grinding process requirements; and c, the vibration direction can be any direction such as the longitudinal direction, the transverse direction, the vertical direction and the inclined direction of the steel rail or the composite disordered vibration direction. According to the vibration grinding method, vibration is provided for the grinding wheel, the grinding efficiency and the feeding speed of the steel rail are improved, and the grinding depth is increased, so that the grinding efficiency is improved, the maintenance time is shortened, the grinding vibration effect is achieved, the grinding force is reduced, meanwhile, the residual stress of the grinding surface is reduced, grinding burn is avoided, the surface quality of the steel rail is improved, and the service life of the steel rail is prolonged.

The invention relates to a softening method of a carburizing area obtained after CSS-42L gear steel is carburized. After high-temperature austenitizing, oil quenching and stress removal treatment are performed, the Ms point of a carburized layer tissue is made to be greatly lowered, hardness of a material may be lowered to be HRC 28-35, and gear shaping, and gear hobbing or finish turning machining can be performed. After the material is softened, a grinding process can be replaced, grinding burn is effectively avoided, and production efficiency is improved.

The invention provides a non-API thread ring gauge electroplating super-hard abrasive molded grinding wheel matrix structure design method. According to the non-API thread ring gauge electroplating super-hard abrasive molded grinding wheel matrix structure design method, a super-hard abrasive molded grinding wheel and a grinding machining method are aimed at a non-API thread ring gauge part; by adoption of the super-hard abrasive molded grinding wheel and the optimized form-grinding machining method, the phenomenon of non-API thread ring gauge grinding burn can be avoided; the super-hard abrasive molded grinding wheel structure design comprises the grinding wheel matrix structure design and the grinding wheel work profile structure design; the super-hard abrasive molded grinding wheel matrix structure design comprises the grinding wheel matrix outline structure design, the grinding wheel groove factor design, the grinding wheel intermittent period design and the sand grooving parameter design; the grinding wheel intermittent period design is equivalent to the groove quantity design; and the super-hard abrasive molded grinding wheel work profile structure design comprises the grinding wheel tooth structure design and the corner critical position structure design. By combination of optimized super-hard abrasive grinding wheel form-grinding machining parameters, the problem about grinding burn in a non-API thread ring gauge rough grinding machining can be solved and the efficient grinding machining demand can be met.

A preparation method for a single-layer brazing diamond grinding wheel comprises the following steps: a. performing rust removal and polishing to a surface of a grinding wheel base body, and then performing alcohol flushing; b. applying a solder layer on the surface of the base body and applying a silver solder layer on a surface of the solder layer; c. cleaning the diamonds with a dilute sulfuric acid and rinsing in ionized water and drying; d. scattering the dried diamonds on the surface of the solder layer and performing brazing treatment by brazing heating equipment, and adding a small amount of carbide in the brazing process. The single-layer brazing diamond grinding wheel manufactured by the invention can enable the grinding material bare height to reach 70-80 % of the grinding material height, and the chip space among the grinding materials is greatly expanded and is not easy to block. More cutting blades are used for efficiently grinding materials and are sharper. The specific grinding energy can be greatly reduced. The heat generated by grinding away each unit volume of metal is decreased. The large chip space can efficiently hold more grinding fluid, so that the grinding temperature is greatly reduced and the grinding burn injury can be efficiently prevented.

A gear tooth surface processing device and a gear manufacturing method are provided which are capable of adjusting processing pressure for the purpose of improving the surface roughness of high-hardness gears and the like. The gear tooth processing device (10) has: a helical grindstone (2); a position adjusting means (3) which is capable of moving the relative positions of a rotary axis (C) of the helical grindstone (2) and a rotary axis (X) of a gear to be processed (W); and a control means (7). The control means (7) includes: a position control unit (71) which operates the position adjusting means (3) so as to adjust the relative positions of the rotary axis (C) of the helical grindstone (2) and the rotary axis (X) of the gear to be processed (W) to cause only one of the tooth surfaces to be processed (11), from among the gear tooth surfaces that form a single tooth of the gear to be processed (W), to make contact with a grindstone tooth surface (21) of the helical grindstone (2) such that the helical grindstone (2) and the gear to be processed (W) are engaged; a grindstone rotation means control unit (72) for operating a grindstone rotation means (4); and a torque control means control unit (73) for operating a rotation torque control means (5) so as to adjust the rotation torque within a predetermined range.

The invention discloses an ultrasonic vibration assisted grinding fluid microchannel infiltrated nano-fluid trace lubrication and grinding device and aims at solving the problem that undeformed abrasive dust thickness has larger influence on the grinding process in the prior art. The ultrasonic vibration assisted grinding fluid microchannel infiltrated nano-fluid trace lubrication and grinding device has the beneficial effects that the lubrication state of single abrasive grains when a material is removed in the grinding process is fully considered from microscopic, and the effect of ultrasonic vibration assisted grinding in improving the cooling and lubrication effects of nano-fluid trace lubrication is effectively realized. According to the technical scheme, the device comprises an ultrasonic vibration mechanism capable of regulating the position of an ultrasonic vibrator space, a nano-fluid trace lubrication and grinding mechanism and a grinding force measurement mechanism; the ultrasonic vibration mechanism is arranged on a workbench; the nano-fluid trace lubrication and grinding mechanism is arranged above a workpiece fixing table; the grinding force measurement mechanism comprises a dynamometer and a grinding force controller which is connected with the dynamometer; and the dynamometer is arranged at the bottom of the ultrasonic vibration mechanism.

The invention discloses a solidified metal bonding agent grinding wheel with inner flow passage structures, a device and a preparation technique. The solidified metal bonding agent grinding wheel withthe inner flow passage structures comprises a grinding wheel base body and a grinding wheel grinding main body. The grinding wheel grinding main body is arranged on the outer side of the grinding wheel base body and provided with the inner flow passage structures. According to the solidified metal bonding agent grinding wheel with the inner flow passage structures, the inner flow passage structures are arranged on the grinding wheel grinding main body, accordingly, the cooling capacity of the grinding wheel can be improved, the heat exchange efficiency is improved, and a grinding workpiece isprevented from being burned.

The invention provides a camshaft grinding processing thermostatic control device and method. The device comprises a power measuring module used for measuring power of an electric motor in real time and outputting the power, and a thermostatic control module used for receiving the power output by the power measuring module and calculating maximum temperature of a surface of a contact area of a grinding wheel and a camshaft according to the power and a preset thermostatic control model, wherein the thermostatic control module is also used for comparing the maximum temperature and a preset temperature threshold; if that the maximum temperature is higher than or equal to the preset temperature value is determined, the electric motor is controlled to lower camshaft rotation speed, and camshaft cutting depth of the grinding wheel is reduced. The device provided in the invention can regulate processing temperature in real time, temperature across a surface of the camshaft is enabled to be set at allowable maximum temperature, the camshaft can be prevented from grinding burn, processing efficiency can be improved, camshaft quality can consequently be improved, and service life of the camshaft can be prolonged.

The invention discloses a method for monitoring grinding wheel wear and grinding burn by using a grinding force, and belongs to the technical field of monitor and control of machining processes. The method comprises the following steps of acquiring discrete-time series of a grinding force signal in real time, extracting important characteristic parameters, such as kurtosis, waveform index, pulse index, amplitude-frequency spectrum kurtosis, amplitude-frequency spectrum pulse index, and amplitude-frequency spectrum cumulative probability, of the grinding force signal through time-domain or frequency-domain analysis, identifying different wear degrees of a grinding wheel, and overhauling the blunt grinding wheel in time; during a steady-state grinding stage, extracting an average amplitude of a tangential grinding force or a frequency spectrum centroid of a power spectrum in real time, and controlling the grinding burn. According to the method provided by the invention, the grinding force online monitoring and real-time signal processing are combined, so that the intelligent monitoring and controlling on grinding wheel-workpiece grinding contact status, grinding wheel wear condition, grinding burn and the like in a whole grinding processing process can be realized; the method for monitoring the grinding wheel wear and grinding burn by using the grinding force has various advantages that the antijamming capability is high, the operation is simple, the programming realization is convenient, the intellectualization is realized and the like.

The invention relates to a process and a device for forming a micro-bulge oil film on a surface of a workpiece under nano particle jet flow condition. According to the process, the action that the nano particle jet flow micro lubrication is coupled with the a micro-bulge on the surface of the workpiece is utilized, a nano fluid is ejected to a grinding area in a higher speed under the action of compressed air, so as to form the lubrication oil film on the surface of the workpiece with the micro-bulge, thereby cooling and lubricating the grinding machining area to the maximum extent. The nano particles are adhered to the rough surface of the workpiece and have stronger cooling performance and excellent friction characteristics, so that the grinding burn is effectively solved, the surface of the workpiece is good in quality, and low-carbon, green and cleaning production with high efficiency, low consumption, environmental friendliness and resource conservation is realized. The device comprises a nano fluid supply device and a compressed air supply device, wherein the two devices are respectively connected with a nozzle through a nano fluid conveying pipe and a compressed air conveying pipe; a set distance d and an included angle alpha are maintained between the nozzle and the workpiece with the micro-bulge surface; and the nano fluid supply device and the compressed air supply device are connected with a control device.

The invention discloses a grinding wheel with internal cooling. The grinding wheel body is a bowl-shaped structure. There is a knife handle on the grinding wheel body. Abrasive grains are uniformly distributed under the cavity wall of the grinding wheel body. The coolant cavity is sealed by a circular plate, and there is a coolant injection hole on the circular plate; the tool handle is provided with a central through hole, and the central through hole leads into the central cavity of the grinding wheel body; uniformly distributed in the cavity wall of the grinding wheel body There is a cooling liquid channel; the entrance of the cooling liquid channel is located in the cooling liquid chamber of the grinding wheel body, and the injection port of the cooling liquid channel is located between two adjacent abrasive grains. The advantages of the present invention are as follows: the cooling liquid is passed through the injection hole through the supercharging device, and the cooling liquid is ejected from the middle of two adjacent abrasive grains by using the pressure, gravity and the centrifugal force of the grinding wheel rotation, which can significantly reduce the temperature of the grinding area. It is a practical and effective grinding tool to avoid grinding burns and achieve more sufficient cooling.

The invention relates to a magnetic nanoparticle jet flow and magnetic force working table coupling oil film forming process and a magnetic nanoparticle jet flow and magnetic force working table coupling oil film forming device. The magnetic nanoparticle jet flow and magnetic force working table coupling oil film forming device includes a magnetic force working table onto which a work piece is attached; a grinding wheel is arranged on the processing position of the work piece, a nozzle is arranged on the position of the grinding wheel cover, and the position of the grinding wheel cover is matched with the work piece; the nozzle is connected with a magnetic nanofluid liquid supply device through a magnetic nanofluid delivery pipe, and connected with an air compressor through an air compressor delivery pipe; the magnetic nanofluid and compressed air formed into a three-phase flow spray after being mixed and accelerated in the nozzle, wherein the three-phase flow spray is a mixed spray of the compressed air, the magnetic nanoparticles and grinding-fluid-based oil particles; and the three-phase flow spray enters the grinding area between the work piece and the grinding wheel, the magnetic force working table is in magnetic coupling with the three-phase flow spray, and an oil film is formed on the surface of the work piece. The magnetic nanoparticle jet flow and magnetic force working table coupling oil film forming device delivers the magnetic nanoparticle fluid to the nozzle and forms a lubricating oil film on the surface of the work piece of the magnetic worktable, so that the maximum cooling and lubricating of a grinding processing area is achieved.

Provided is a gear grinding method wherein an initial cutting position by a grindstone is appropriately set, resulting in an improvement being able to be made in machining accuracy. For this purpose, the gear grinding method is such that rotation of a workpiece (W) about a workpiece rotation axis (C), cutting by a grindstone (15) in the X-axis direction, and feeding of the grindstone (15) in the Z-axis direction are controlled, resulting in the workpiece (W) being ground by the grindstone (15). In this method, measurement points (P1 - P9) are set in a grid-like pattern on a left tooth surface (WL) and a right tooth surface (WR) of a predetermined tooth (Wa) of the workpiece (W); rotation phases about the workpiece rotation axis (C) at the measurement points (P1 - P9) are detected; tooth thickness deviation amounts (e) between a reference involute tooth surface and the measurement points (P1 - P9) on the left and right tooth surfaces, as well as tooth thickness deviation amounts (e) between the involute tooth surface and corresponding points (Q1 - Q9) on all teeth other than the tooth (Wa), are obtained on the basis of the detected rotation phases; and an initial cutting position (X1) for the grindstone (15) is set on the basis of the largest of the deviation amounts (e) .

The invention discloses a tangential self-excited vibration auxiliary dry grinding system and method. A grinding head system is mounted on a self-excited vibration plate. The self-excited vibration plate is fixed to a machine tool body through a cantilever. During machining, a grinding wheel of the grinding head system rotates to serve as an excitation source of the whole system, energy is input to the self-excited vibration plate, and the self-excited vibration plate drives the grinding head system to subjected to self-excited vibration, so that abrasive grains of the grinding wheel are made to make reciprocating componential movement at a certain frequency in the tangential direction of the grinding wheel relative to a workpiece while grinding the workpiece. By controlling the rotating speed of the grinding wheel, the quantity of input self-excited vibration energy can be adjusted; by analyzing and designing the inherent frequency and modal of the self-excited vibration plate, the frequency of a self-excited vibration system can be controlled; and the abrasive grains of the grinding wheel make contact with or are separated from the workpiece periodically, so that grinding heat is effectively dissipated, and the purposes of decreasing the grinding temperature and avoiding grinding burns are achieved.

The invention discloses a manufacturing method of a slewing bearing, belongs to the field of production of slewing bearings, and solves the problems of short service life, weaker quality stability and low machining production efficiency of the traditional slewing bearings. The manufacturing method of the slewing bearing comprises a rough machining step, a lineation step, a hole boring step, a semi-finish turning step, a tempering step, a finish machining step, a roller way finish machining step and an assembly step, wherein the tempering step of the inner surface of a roller way is to use a nozzle for aligning to the inner surface of the roller way to spray quenching liquid and immediately stop spraying when rotating by 360-n degrees, and the roller way finish machining step is to grind the inner surface of the roller way by adopting turning to replace grinding. The manufacturing method of the slewing bearing can effectively improve the production efficiency, and manufactures the slewing bearings with stable quality, high precision and long service life.

The invention discloses a parameter design method of a tooth profile grinding temperature uniform macrostructure forming grinding wheel, which is characterized in that a groove whose width varies according to a certain rule from the bottom to the top is designed on the working surface of the forming grinding wheel. The process of determining the change law of the groove width is as follows: establish an analytical model of the intermittent grinding temperature field of the grooved grinding wheel; establish a correlation model of grinding parameters, groove width and grinding temperature through multiple nonlinear regression analysis; combine the gear forming grinding Based on the geometric relationship of the grinding contact, the relationship model between the groove width of the grinding wheel and the grinding parameters, the geometric size of the gear and the contact position is established. According to the derived relationship model, the groove width at any position of the grinding wheel is calculated to determine the macroscopic structure of the grinding wheel working face. Compared with the existing continuous forming grinding wheel, the grinding wheel of the invention is beneficial to solve the problem that the gear forming grinding temperature is concentrated on the top of the teeth, prevent grinding burns and ensure the grinding quality.

The invention belongs to the technical field of machining, and particularly relates to a method for protecting large aviation spiral bevel gears against grinding burn. According to the method, three cooling oil pipes are added to a spraying position of cooling oil and the calibers of the oil pipes are reduced, so that the cooling pressure is increased, and an intermediate point is found for tool setting according to the tooth pitch accumulated tolerance of parts; by the adoption of the method, the large aviation spiral bevel gear can be effectively protected against the grinding burn, and theeffect is remarkable; and through actual verification, the qualified rate of machined products is greatly improved.

The invention provides a camshaft grinding processing thermostatic control device and method. The device comprises a power measuring module used for measuring power of an electric motor in real time and outputting the power, and a thermostatic control module used for receiving the power output by the power measuring module and calculating maximum temperature of a surface of a contact area of a grinding wheel and a camshaft according to the power and a preset thermostatic control model, wherein the thermostatic control module is also used for comparing the maximum temperature and a preset temperature threshold; if that the maximum temperature is higher than or equal to the preset temperature value is determined, the electric motor is controlled to lower camshaft rotation speed, and camshaft cutting depth of the grinding wheel is reduced. The device provided in the invention can regulate processing temperature in real time, temperature across a surface of the camshaft is enabled to be set at allowable maximum temperature, the camshaft can be prevented from grinding burn, processing efficiency can be improved, camshaft quality can consequently be improved, and service life of the camshaft can be prolonged.

The invention discloses an expander-driven refrigeration low-temperature cooling nanoparticle jet micro-lubrication supply system, comprising a low-temperature gas generating device, the low-temperature gas generating device is connected to a nano-fluid micro-lubrication supply system after being decelerated by a harmonic gear reducer, and the low-temperature gas The generating device is connected with the gas distribution control valve, the nanofluid micro-lubrication supply system is also connected with the external mixing nozzle, and the gas distribution control valve is used to control the gas flow; the system device can effectively reduce the thermal damage of grinding and improve the efficiency of the grinding process. The surface integrity and machining accuracy of the machined workpiece have stronger cooling performance and excellent tribological characteristics, and the surface can realize low-carbon green and clean production with high efficiency, low consumption, environmental friendliness and resource saving.