208 results about "Machining" patented technology

The invention relates to a device and a method for magnetically grinding the inner surfaces of large-diameter long and straight pipes. The device comprises a bed, spindle motors, couplings, a magneticpole disc, a motor driving slide rail device and a hoisting device. Two ends of each pipe fitting can be sealed by pipe fitting plugs and are fixed by the aid of four-jaw chucks, the four-jaw chuck at one end of each pipe fitting is connected with the corresponding spindle motor by the corresponding coupling, the four-jaw chuck at the other end of each pipe fitting is connected with a support seat by bearings, support seat slide rails are fixed onto the bed, and the support seats are slidably connected with the support seat slide rails by support seat sliders; the motor driving slide rail device is arranged at the bottom of the bed, and the magnetic pole disc is connected with the motor driving slide rail device by the hoisting device, can be lifted under the control of the hoisting device and can axially move along the pipe fittings under the control of the motor driving slide rail device. The device and the method have the advantages that finish machining can be carried out on the inner surfaces of the pipe fittings by the aid of magnetic grinding processes, and carbon deposits, oil stain and rust stain which are accumulated at grooves inside the pipe fittings can be effectivelyremoved by the aid of the device and the method.

The invention discloses a method and a device for electrolytic machining of massive array tiny pits through a wedge-shaped runner, and belongs to the technical field of electrolytic machining. The method includes processing the surface of a mask plate to enable the surface to fit with the surface of a workpiece anode; fixing a wedge-shaped tool cathode above the mask plate to enable the wedge-shaped runner to be formed between the wedge-shaped tool cathode and the mask plate; connecting the workpiece anode and the wedge-shaped tool cathode with an anode and a cathode of a power source respectively; feeding an electrolyte into the wedge-shaped runner, wherein the electrolyte reaches the surface of the workpiece anode through penetrating group holes in the mask plate; switching on the power source for electrolytic machining. The runner is arranged to be wedge-shaped, so that electric field intensity and electrolyte flowing speed are enabled to be progressively increased along the direction of the runner, both corrosion strength and speed of a workpiece are enabled to tend to be uniform, and uniformity and machining accuracy of electrolytic machining are improved. A PDMS (polydimethylsiloxane) template is taken as the mask plate, bonding strength of the mask plate and the workpiece anode can be guaranteed, stray corrosion, of the electrolyte, to places around a machining area can be effectively reduced, and locality and uniformity of electrolytic machining can be improved.

The invention belongs to the technical field of PCB processing, and discloses a tool changing trolley which comprises a trolley body, at least two layers of supporting plates arranged in the trolley body in a sliding manner, a tool box placing plate mounted on the supporting plate and sliding along with the supporting plate, a tool box fixed on the toolbox placing plate and used for placing a tool, and a manipulator arranged on the trolley body and used for taking and placing the toolbox. According to the tool changing trolley, at least two layers of supporting plates are arranged, so that atleast two layers of tool boxes can be placed, multi-layer placement of tools is achieved, the tool placing number is increased, and the working efficiency of the tool changing trolley is improved. Theinvention further provides a PCB drilling and milling machine with the tool changing trolley, unmanned, intelligent and flexible tool changing procedures can be achieved, a movable tool holder is matched with the tool changing trolley, tools can be changed while machining is conducted, the equipment utilization rate is increased, and recovery and grinding management of the tools are facilitated.

The invention relates to the field of machining, in particular to a method for machining an elastic expansion ring workpiece. The method comprises the following steps of rough turning: roughly turning various portions, machining an excircle of a left end at the position of 4mm until the size of the excircle meets requirements, and performing follow-up machining on a pressure table under the condition that the allowance of rest portions is 2mm-3mm; heat treatment: performing tempering by 225-285HB under the conditions that tissues are uniform and crystalline grains are refined, and eliminating stress; finish turning: performing finish turning on the various portions, turning an excircle of the left end at the position of 4mm until the size of the excircle meets requirements so that the excircle has a clamping effect when an inner hole is formed, turning an excircle of a right end under the condition that the grinding allowance of the excircle of the right end is 0.6mm-0.8mm until the size of the excircle of the right end is suitable, forming the inner hole under the condition that the allowance of the inner hole is 0.5mm-0.6mm, clearing a root groove, forming a taper hole under the condition that the grinding allowance of the taper hole is 0.6mm-0.8mm and the length allowance is 0.8mm-1.2mm, and placing the rest part on the left end at the position of 4mm; and lineation: drawing holes and grooved lines. By the method for machining the elastic expansion ring workpiece, potential quality hazards caused by the original machining technology and the original operation method are avoided, quenching deformation, machining stress deformation and clamping deformation can be eliminated well, and the machining quality of parts is guaranteed.

The invention discloses a deep hole processing method adopting a common lathe, and relates to the mechanical processing field, in particular to the deep hole processing method adopting the common lathe. The deep hole processing method comprises the following steps: turning the two end surfaces throughout the overall length with machining allowance of 1 mm, chamfering at the two ends of a hole by an angle of 2*30 degrees, using two tips to clamp and roughly turn an excircle with allowance of 0.5mm in single side; clamping one end of a workpiece, supporting the other end of the workpeice by use of a center frame, using an inner hole cutter to roughly turn the inner hole throughout one half the overall length with the allowance of 0.5mm in single side; turning round the workpiece, and roughly turning the other end of the workpiece throughout the rest of the length of the hole with the allowance of 0.5mm in single side of the inner hole; finishing the two end surfaces and controlling the overall length of the workpiece, chamfering the orifices at the two ends by 2*30 degrees; using two ejector pins to clamp and finish the excircle of a cylinder to dimension requirements; using four claws to clamp the excircle, aligning, and using the center frame to support the finished inner hole, wherein the roughness is Ra3.2 and allowance is 0.2mm; repeating the third-step clamping process to finish the inner hole throughout the other half length, wherein the roughness is Ra3.2 and the allowance is 0.2 mm; and carrying out floating boring. The deep hole processing method is simple in processing process, adopts the common lathe to process a deep hole, so that the production cost is reduced, and processing precision can be met.

The invention belongs to the technical field of bearing machining, and particularly relates to a dimension compensation quantity determining method for bearing machining. The dimension compensation quantity determining method for bearing machining comprises the steps that the type of a to-be-machined workpiece is determined; the standard workpiece temperature T2 and the machined workpiece temperature T1 are detected; a pre-stored machining model and corresponding machining parameters are selected according to the type of the to-be-machined workpiece; and the bearing machining model is assignedaccording to the standard workpiece temperature T2, the machined workpiece temperature T1 and the corresponding machining parameter, so that the dimension compensation quantity of the to-be-machinedworkpiece is obtained through calculation. By adoption of the dimension compensation quantity determining method for bearing machining, machining dimension compensation quantity errors caused by experience-based judgment by operators are avoided, the machining precision and machining efficiency of bearings are improved, the machining repair rate of the bearings is greatly decreased, and the numberof rejected products is reduced; and operation is easy.

The invention discloses a method for machining a submerged pump impeller. The method comprises the steps that firstly, a three jaw chuck clamps a large outer circle of the impeller, and rough turning is performed on an impeller opening ring, a plane A and a front cover board after calibration; secondly, surfacing adjusting is performed, the three jaw chuck clamps the opening ring, rough turning is performed on a plane B after calibration, drilling is performed, rough turning is performed on a rear cover board and a sealing surface, and rough turning is performed on the large outer circle; thirdly, rough turning is performed on the plane B, boring is performed, the rear end cover and the sealing surface undergo finish turning so as to meet the requirements of a drawing, and chamfering is performed; fourthly, turning is performed on a core rod, the impeller is sleeved in the core rod and screwed through a nut, finish turning is performed on the plane A (1), the overall length is controlled according to the requirements of the drawing, the opening ring and the front end cover (3) undergo turning so as to meet the requirements of the drawing, the large outer circle undergoes finish turning so as to meet the requirements of the drawing, and chamfering is performed; fifthly, checkout is performed; sixthly, a static equilibrium test is performed as the requirements; seventhly, a keyway is inserted; eighthly, checkout is performed; ninth, cleaning, burring, oiling and stockroom entering are performed. The method for machining the submerged pump impeller facilitates machining, ensures machining precision and improves production efficiency, and is suitable for machining of industrial pump impellers.

The invention discloses steel bending equipment for steel machining, and belongs to the technical field of steel machining. The steel bending equipment comprises a machine body, lubricating oil tanks,a base, roll shafts, an oil storage box, a positioning mechanism and a mounting seat, wherein the machine body is fixedly installed on the base through a side connecting plate, hydraulic machines arefixedly installed at the top of the machine body, and one ends of hydraulic rods installed at the output ends of the hydraulic machines penetrate through and extend to the outer side of the machine body to be fixedly provided with a bending plate. According to the steel bending equipment, the roller shafts are installed on the equipment, when steel is bent and pressure is applied to the bent position of the steel, the roll shafts replace a bent face to make contact with the steel, and when pressure is applied for bending, the steel can be bent along the smooth surfaces of the roll shafts, compared with traditional bending treatment, the situation that the surface of the steel is scratched and damaged is avoided, and meanwhile, the lubricating oil tanks are installed on the outer side of the equipment in a matched mode, the contact positions between the roll shafts and the steel can be effectively lubricated, and the bending smoothness is further improved.

The invention relates to an external machining fixture for one-step clamping. The external machining fixture comprises a body and a sliding tip cone, the sliding tip cone is mounted inside the body and is limited to only axially slide inside the body by a positioning screw, a driving plate is sleeved at the front end of the body, a support lever is arranged at the rear end of the sliding tip cone, a nut is arranged at the front end of the support lever, a hexagonal plug is arranged at the rear end of the support lever, and a Belleville spring is arranged on the support lever and is compressed inside the body by the hexagonal plug. According to the external machining fixture for one-step clamping, the sliding tip cone and driving teeth are used for double positioning support, and external machining can be realized by one-step clamping. A plurality of oil cavities are further arranged on the fixture to adapt to workpieces with different end faces, and adaptability of the fixture is improved. By means of practical machining and use, the fixture is simple in structure, high in machining precision and remarkable in implementation effect.

The invention relates to an efficient double-end-face grinding machine and a control method thereof. The efficient double-end-face grinding machine comprises a machine body, tool feeding devices, a contact type measuring device and a feeder. Each tool feeding device comprises a spindle, a grinding wheel, a spindle motor and a tool feeding motor, wherein the spindle motor drives the spindle to drive the grinding wheel to rotate, and the tool feeding motor drives the spindle to move left and right. The contact type measuring device comprises a measuring head vertical-moving cylinder and a contact type measuring head, and the measuring head vertical-moving cylinder drives the contact type measuring head to move vertically. The feeder comprises a magnetic reciprocating workbench and a feeding motor. A five-axis control system is adopted by the efficient double-end-face grinding machine, automatic grinding, automatic compensation and automatic measuring of double end faces are achieved, coarse and fine machining and automatic measuring on the periphery of a mold core can be efficiently completed during one-time clamping of the ceramic mold core, production efficiency for the mold core is improved, and the precision and smoothness of the mold core are improved.