Abstract: A lubricant made from vegetable oil that can form a friction film when used. The lubricant has 86-99 wt % of vegetable oil that contains double bonds and bis-allylic protons, 10-0.5 wt % trans FAT, 3.6-0.3 wt % surfactant, and 0.4-0.2 wt % antioxidant. Additionally, the weight percentages of surfactant are 3.6˜0.3 wt %, and the weight percentages of antioxidant are 0.4˜0.2 wt %.

Abstract: The disclosure provides a method to estimate tool life on a cutting machine. A sensor is installed on the cutting machine to measure the cutting thrust of a cutting tool during operation. Specifically, the information gathered from the sensor enables the cutting tool to cut a workpiece at different settings of cutting rate, with a maximum cutting thrust of the cutting tool measured during each cut, and defined as a characteristic signal. Through the characteristic signals obtained from the multiple cuts, factorization processing and inverse processing are initiated to obtain plural values in a complex remaining life index for the cutting tool. Using the cutting rate as the horizontal axis and the remaining life as the vertical axis, the complex remaining life and corresponding cutting rates are plotted on the vertical axis and the horizontal axis to form a line graph illustrating the complex remaining life index.

Abstract: A metal three-dimensional printing method includes steps of: A) laying a layer of metal powder in a chamber, and the chamber having a first gas filled therein; B) projecting a laser on the layer of metal powder along a predetermined path, thereby allowing the metal powder in a projected area to be melted and sintered for shape forming, applying a second gas at a predetermined flow rate on a surface of the metal powder in the projected area, and preventing the metal powder in the projected area from moving due to application of the second gas; wherein the second gas allows the metal powder being projected to be cooled; C) during projection of the laser, a cooling level of the metal powder being projected is changed by changing a flow rate of the second gas, thereby changing a sintering power of the metal powder.

Abstract: A monitoring module for assembly accuracy between two components includes a first component having an installation surface, and a second component having an opposite surface and disposed in a way that the opposite surface faces towards the installation surface. A preload is continuously applied to at least one of the first and second components to press the opposite surface of the second component on the installation surface of the first component. The installation surface is defined with a reference point. At least two load cell pairs are disposed on the installation surface. Each load cell pair has two load cells located on two sides of the reference point respectively, and the imaginary line connecting the two load cells passes through the reference point. Besides, the load cells are separated from each other without any overlap. The opposite surface is pressed on the at least two load cell pairs.

Abstract: A monitoring module for assembly accuracy between two components includes a first component having an installation surface, and a second component having an opposite surface and disposed in a way that the opposite surface faces towards the installation surface. A preload is continuously applied to at least one of the first and second components to press the opposite surface of the second component on the installation surface of the first component. The installation surface is defined with a reference point. At least two load cell pairs are disposed on the installation surface. Each load cell pair has two load cells located on two sides of the reference point respectively, and the imaginary line connecting the two load cells passes through the reference point. Besides, the load cells are separated from each other without any overlap. The opposite surface is pressed on the at least two load cell pairs.

Abstract: A double nut ball screw capable of sensing preload includes a screw rod, two nuts, a connection key, multiple balls, a deformable annular platform having a U-shaped cross section with a bottom wall portion and two sidewall portions integrally connected with two opposite lateral sides of the bottom wall portion, and an annular force sensor mounted on the bottom wall portion of the deformable annular platform and located between the two sidewall portions. The deformable annular platform has a protruded portion located at the outer surface of the bottom wall portion opposite to the force sensor, and is disposed in the gap between the two nuts and wedged between two mating surfaces of the two nuts with the distal ends of the sidewall portions abutted against the mating surface of one nut and the protruded portion abutted against the mating surface of the other nut.

Abstract: A double nut ball screw capable of sensing preload includes a screw rod, two nuts, a connection key, multiple balls, a deformable annular platform having a U-shaped cross section with a bottom wall portion and two sidewall portions integrally connected with two opposite lateral sides of the bottom wall portion, and an annular force sensor mounted on the bottom wall portion of the deformable annular platform and located between the two sidewall portions. The deformable annular platform has a protruded portion located at the outer surface of the bottom wall portion opposite to the force sensor, and is disposed in the gap between the two nuts and wedged between two mating surfaces of the two nuts with the distal ends of the sidewall portions abutted against the mating surface of one nut and the protruded portion abutted against the mating surface of the other nut.

Abstract: A method of making a calcium-fluoride layer formed on an object surface for more wear resistance includes the steps of coating sodium fluoride to a surface of an object having calcium, whereby the calcium fluoride and the calcium are inverted to become a calcium-fluoride layer on the surface of the object after a chemistry reaction; preparing a CO2 laser device having a CO2 laser emitter for emitting CO2 laser; and applying irradiation of the CO2 laser via the CO2 laser emitter to the calcium-fluoride layer for at least five seconds. In light of this, the wear resistance of the calcium-fluoride layer is enhanced for at least 34%, the absorption rate of the fluoride is increased for at least 23%, and the surface of the object has aesthetic and integral appearance.

Abstract: A ball screw capable of sensing a preload is formed of a nut having an internal thread surrounding an imaginary central axis, a screw inserted into the nut and having an external thread surrounding the imaginary central axis, and a plurality of balls are mounted between the internal and external threads in a way that the balls roll therebetween. A mounting hole having a mounting surface therein is formed in the nut. The mounting surface corresponds to the internal thread in a way that it is substantially perpendicular to the imaginary central axis. A force sensor is mounted to the mounting surface. The force sensor can directly sense the preload in real time, so it is uneasily adversely affected by any environmental factor to have more accurate sensing result relatively.

Abstract: A method of making a calcium-fluoride layer formed on an object surface for more wear resistance includes the steps of coating sodium fluoride to a surface of an object having calcium, whereby the calcium fluoride and the calcium are inverted to become a calcium-fluoride layer on the surface of the object after a chemistry reaction; preparing a CO2 laser device having a CO2 laser emitter for emitting CO2 laser; and applying irradiation of the CO2 laser via the CO2 laser emitter to the calcium-fluoride layer for at least five seconds. In light of this, the wear resistance of the calcium-fluoride layer is enhanced for at least 34%, the absorption rate of the fluoride is increased for at least 23%, and the surface of the object has aesthetic and integral appearance.

Abstract: A ball screw includes a screw rod having an external thread; two screw nuts having an internal thread and a circulatory passage each, a spiral path being formed between the internal threads and the external thread and communicating with the circulatory passage, each of the two screw nuts having a keyway located on respective toric surfaces of opposite ends of the two screw nuts, the two keyways facing each other; a link mounted inside the two keyways to traverse the two screw nuts; a force sensor mounted between and squeezed by opposite sides of the two screw nuts; and a plurality of balls located inside the spiral path or the circulatory passage and keeping rolling while moving.

Abstract: A band saw machine includes a working bench, a motor mounted to the working bench, a driving wheel mounted to the working bench and connected with the motor, a driven wheel mounted to the working bench, a band saw running on the driving and driven wheels, and a force sensor mounted to a driven wheel for sensing how much the driven wheel is forced in the process of cutting and for emitting a sensing signal to a control system. In this way, the control system can receive the sensing signal and control the running speed of the motor according to the sensing signal to adjust the cutting speed of the band saw.

Abstract: A ball screw capable of sensing a push force in real time is formed of a screw rod, a screw nut mounted to the screw rod, a plurality of balls mounted between the screw rod and the screw nut, and a force sensor having a first fixture portion and a second fixture portion. The first and second fixture portions are fixed to a working bench and the screw nut, respectively, for making the force sensor sense how much the push force is while the screw nut drives the working bench to move. In this way, monitoring the voltage value outputted from the force sensor can monitor the push force in real time while the ball is working.

Abstract: A ball screw capable of thermal dissipation is formed of a screw rod, a screw nut, and a plurality of balls mounted between the screw rod and the screw nut. The screw nut includes a mounting surface. A thermoelectric cooler is mounted to the screw nut and includes a heat-absorptive surface and a heat-dissipative surface. The heat-absorptive surface is adhered to the mounting surface. Accordingly, the ball screw can cool the heat down and is structurally simple and the whole weight is not increased due to the thermoelectric cooler.

Abstract: A band saw machine includes a chassis, a motor mounted to the chassis, driving wheel mounted to the chassis and connected with the motor, a driven wheel mounted to the chassis, a band saw running on the driving and driven wheels, a band-saw regulator mounted to the chassis and located between the driving and driven wheels, and a vibration sensor mounted to the surface of the band-saw regulator for sensing the vibration of the band-saw regulator generated in the process of cutting and thus emitting a sensing signal to a control system. In this way, the control system can control the rotational sp d of the motor according to the sensing signal received from the vibration sensor to automatically regulate the cutting speed.

Abstract: A ball screw capable of thermal dissipation is formed of a screw rod, a screw nut, and a plurality of balls mounted between the screw rod and the screw nut. The screw nut includes a mounting surface. A thermoelectric cooler is mounted to the screw nut and includes a heat-absorptive surface and a heat-dissipative surface. The heat-absorptive surface is adhered to the mounting surface. Accordingly, the ball screw can cool the heat down and is structurally simple and the whole weight is not increased due to the thermoelectric cooler.

Abstract: A ball screw capable of sensing a torque in real time includes a screw rod, a screw nut sleeved onto the screw rod, a plurality of balls mounted between the screw rod and the screw nut, and a torque sensor haying a first fastening portion and a second fastening portion. The first fastening portion is fixed to a working bench and the second fastening portion is fixed to the screw nut, so the torque sensor can sense how much the torque is while the screw out is driving a working bench to move. In light of this structure, monitoring the voltage value outputted by the torque sensor can sense the torque generated while the working screw rod is working.

Abstract: A ball screw is formed of a screw rod, two screw nuts, a link, a plurality of balls, and at least two parallelism sensors. The screw nuts are sleeved onto the screw rod and are connected with each other via a link to define a spiral path therebetween. The spiral path is linked with an internal circulatory passage of each screw nut for receiving a plurality of balls. The two parallelism sensors are oppositely mounted between the two screw nuts and surround the screw rod for sensing the preload between the two screw nuts to figure out whether the parallelism of the screw rod after the assembly is deviated or not. In this way, monitoring the voltage value outputted from the parallelism sensors can monitor the parallelism of the screw rod in real time after the assembly.

Abstract: A band saw machine includes a working bench, a driving wheel mounted to the working bench, a driven wheel mounted to the working bench, and a band saw running on the driving and driven wheels. A storage member and a hydraulic cylinder connected with the storage member are mounted to the working bench. The hydraulic cylinder includes a piston rod for pushing against the driven wheel to make the driven wheel tighten the band saw while moving relative to the driving wheel. A force sensor is mounted between the piston rod and the driven wheel for sensing the tension of the band saw and emitting a sensing signal to a control system. In this way, the control system can receive the sensing signal and controllably making the storage member supply oil to the cylinder body according to the sensing signal to force the piston rod to elongate.

Abstract: A ball screw capable of sensing a preload is formed of a nut having an internal thread surrounding an imaginary central axis, a screw inserted into the nut and having an external thread surrounding the imaginary central axis, and a plurality of balls are mounted between the internal and external threads in a way that the balls roll therebetween. A mounting hole having a mounting surface therein is formed in the nut. The mounting surface corresponds to the internal thread in a way that it is substantially perpendicular to the imaginary central axis. A force sensor is mounted to the mounting surface. The force sensor can directly sense the preload in real time, so it is uneasily adversely affected by any environmental factor to have more accurate sensing result relatively.