249results about How to "Improve processing pass rate" patented technology

The invention relates to a processing technology for an annular thin-walled part, which is characterized in that the annular thin-walled workpiece to be processed is sheathed on a core shaft sleeve which is processed from a core shaft and clamped in a clamp mouth of a soft three-jaw fixed on a three-jaw chuck by screws, the annular end face of the workpiece to be processed is contacted and locked with an outer cover plate or a locking cover plate, the outside and inside diameters are processed by a lathe, the workpiece is tailored by the steps, the core shaft sleeve is sheathed into the inside diameter of an annular thin-walled sleeve to improve the rigidity of the annular thin-walled sleeve during processing, and the locking cover plate is contacted with the annular end face of the processed workpiece to ensure that the workpiece does not bear external radial force. The processing technology effectively ensures the processing accuracy of the annular thin-walled part, and improves the processing qualification rate of the workpiece, which meets the designed dimensional requirements.

The invention belongs to the field of sheet metal and welding processing, and relates to an integral forming method for a thin-walled titanium alloy part with an irregularly-shaped curved surface. The integral forming method aims at overcoming the defects that the shape of parts processed through the prior art is limited or the procedure and the cost are higher, and effectively ensuring the precision forming of a thin-walled component with an irregular shape. The integral forming method comprises the steps as follows: a parting surface is determined; blanking is carried out; in the preforming step, a plate is bent from a flat into a circular arc through a bending die or a bending machine; welding is carried out; in the hot shaping step, a hot shaping die is put in the inner part of a part that is processed through the assembly welding under the ordinary temperature, and the part is supported tightly due to the dead weight of the die and is heated in a hot shaping machine; and in addition, a pressing machine applies pressure to the hot shaping die when the part is heated until material is softened, so as to enable the part to reach the needed size. The integral forming method comprehensively utilizes the advantages of various processes, can obtain the large-sized thin-walled titanium alloy part with the irregularly-shaped curved surface through only two weld joints, and achieves higher surface quality of the part.

The invention discloses a machining processing method of parts with a long shaft and a thin wall, belonging to the technical field of mechanical machining. The processing method comprises the following steps: firstly selecting the required metal material, then performing baiting, thermal refining, roughly machining, ageing at high and low temperatures, half precisely machining and precisely machining, and finishing the machining after the passed inspection; during the half precise machining, the outer circle of the part with the long shaft and thin wall is preserved with the machining residue; during the precisely machining, an expandable shoulder plunger piston clamp is used for matching with the part to machine; the other end of the part is reserved with a technical handle and provided with a central hole so as to locate through the outer diameter of the clamp and the inner hole of the part; and the outer diameter of the clamp is regulated so that the outer diameter is properly matched with the inner hole of the part. By using the processing method, the problems that the part with the long shaft and thin wall is easy to deform during the mechanical machining, is incapable of reaching the requirement of the technical parameter, and is low in machining yield are solved.

The PCB dual surface drilling positioning has at least four positioning holes on the board, positioning pins on the drilling fixture or drilling platform opposite to the positioning holes, with the positioning pins and the holes matching with each other to fix the PCB board when it drills from either positive or negative side of the board.It can use the interference principle of positioning, reduce the deviation of two positioning zero points, with high positioning precision, and increased in drilling efficiency and yield rate.

The invention discloses a datum transformation fixture and a datum transformation method for guide blades, and belongs to the technical field of aero-engine blade manufacturing. The fixture comprises a bottom plate, wherein square box location blocks, a square box press plate mechanism and a square box compaction block mechanism are arranged on the upper part of the bottom plate, and a square box is installed on the square box location blocks; blade location blocks, movable blade location pins, a blade press plate mechanism and a blade compaction block mechanism are further arranged on the upper part of the bottom plate, and the blade location blocks and the movable blade location pins are corresponding to guide blade blank location points; and a left baffle and a right baffle are arranged at blade installation ports at the two sides of the square box. The method comprises the following steps: rotating a second movable handle, and enabling the first location pin and the second location pin to move towards a centre; installing the guide blades in the square box, and enabling an exhaust side of each guide blade to be downward and enabling an intake side of each guide blade to be upward; installing the square box and the guide blades, compacting the square box, locating the guide blades, compacting the guide blades, and installing upper baffles of the left baffle and the right baffle onto the intake sides of the guide blades; and pouring a low-melting-point alloy, and detaching parts.

The invention provides a clamping device for processing a mushroom-shaped blade having a Z-shaped blade shroud, and can solve the problems that in a conventional processing course, different processing equipment is adopted to process a blade root and a blade shroud in operation procedures, so that the accumulated error is large, and the requirement for processing dimension cannot be met. A blade root positioning and clamping assembly and a blade shroud positioning and clamping assembly are respectively mounted on the lateral left side and the lateral right side of a bottom plate; the blade shroud positioning and clamping assembly comprises a blade shroud tightly-propping seat and a blade shroud positioning seat; the blade shroud tightly-propping seat is detachably mounted at the lateral right side end of the bottom plate; the blade shroud positioning seat is located at the lateral left side end of the blade shroud tightly-propping seat; a positioning groove is formed in a front side wall of the blade shroud positioning seat; supporting screws are separately arranged at a groove bottom surface and a front side groove wall of the positioning groove; floating supports are separately arranged on the rear side groove wall and the front side groove wall of the positioning groove, and are separately located on the right side of the corresponding supporting screws; a profile compacting block is located on the bottom plate and in front of the blade shroud positioning seat; and compacting screw facing the blade shroud positioning seat is arranged on the profile compacting block.

The invention discloses a laser ranging sensing based blank allowance automatic detection device and method and belongs to the technical field of automatic detection equipment. The method comprises the following steps of a workpiece blank is mounted in a clamp according to a designed positioning manner; a laser ranging sensor is carried by an industrial robot, the datum positions in an X direction, a Y direction and a Z direction in the clamp are measured, and blank sizes of the workpiece blank in the X direction, the Y direction and the Z direction relative to the datum positions are measured; and after measurement of all data is finished, a control system sends detection data to a host computer, and the host computer performs data processing and feeds a result back to a numerically-controlled machine tool. The laser ranging sensing based blank allowance automatic detection device and method have the beneficial effects that automatic feeding processing of the workpiece blanks is realized, manual marking and preprocessing rare replaced, the purposes of lowering the equipment cost and the labor cost are achieved, the processing qualified rate of the blanks is increased, and the automation level, the informatization level and the intelligence level of an automatic production line are promoted at the same time.

The invention relates to a splitting and assembling processing method for a fine forming die which leads about 30mm of a movable mould core blank and utilizes a linear cutting processing to divide into a plurality of equal parts, codes running numbers according to sequence and carries through plane furbishing and polishing processing on a cutting parting surface; then utilizes the radial actions of an anchor ear and trip bolt to fix the movable mould core; clamps and turns the locating devices at two ends and then utilizes a fine jig mill to process a datum hole; then utilizes a self-turning mode and adopts the modes that a floral disc and a mandrel are tightly cooperated and the mandrel is cooperated with the datum hole of the movable mould core in small clearance to carry through fine forming processing on the inner shape and outer taper of a product. The die forming product processed by the method has the advantages of large extent improving on the surface quality and dimension precision, completely qualified quality, no security hidden troubles, convenient processing. The processing equipment used has the advantages of simple structure and lower cost.

The invention discloses a main valve element of a precise pressure reducing valve. The main valve element of the precise pressure reducing valve comprises a valve rod, a connecting sleeve and a steel ball. A connection section is turned on the end portion of the valve rod. A conical bearing shoulder is turned on the neck portion of the connection section. A shoulder-shaped step is turned in the middle of the valve rod. A nitrile rubber layer is vulcanized on the shoulder-shaped step. A connection through hole is turned in one end of the connecting sleeve, the end with the connection through hole is connected to the connection section of the valve rod in a pressing mode through interference fit, a bearing hole with the small end portion and a swallow-tail section is turned in the other end of the connecting sleeve, and the steel ball is pressed into the bearing hole through interference fit. The steel ball is a steel ball for a ball bearing. According to the structure of the main valve element, the production technology is simplified and various technical requirements of the main valve element are met.

The invention discloses a method for processing steel member bush step holes with guaranteed coaxiality. The method adopts S145 high precision numerical control internal grinder and the strong programming function of the S145 high precision numerical control internal grinder to realize processing of two step holes of a steel member bush by one time clamping. During clamping, an excircle of a member is used as a positioning clamping reference surface of the processing and soft claw clamp is selected and used; the soft claw is polished so that the jitter of the soft claw is not greater than the precision requirement of the member; a suitable grinding wheel is selected according to the size, roughness, cylindricity and coaxiality of the member; a diamond pen is adopted to flat the excircle surface of the grinding wheel; a processing program is compiled; the processing program is input in the S145 high precision numerical control internal grinder; a zero-point position of a three-dimensional coordinate for processing the member is registered in the S145 high precision numerical control internal grinder; the grinding wheel is adjusted to the zero point position and the S145 high precision numerical control internal grinder is started to automatically complete processing according to the program. By means of the method, the qualified rate of processed members is increased from 10-60% to 90% and above.

The invention discloses a positioning fixture for drum-like part turning. The positioning fixture comprises a support bar, wherein the front end of the support bar is coaxially provided with a support device which is inserted in the inner hole of a drum-like part when in use; the supporting device comprises a support wheel coaxially wound at the outer side of the support bar; a spoke structure used for supporting and fixing the support wheel is fixedly arranged between the support wheel and the support bar; spiral mounting holes, which extend along the radial direction of the support wheel, are uniformly and circumferentially distributed in the external ring surface of the support wheel; support studs are spirally assembled in the spiral mounting holes; and one end, away from the support bar, of each support stud is provided with a propping end which is used for propping against the inner hole wall of the drum-like part when in use. Holes are not required to be formed in the support bar, so that the strength of the support bar is not influenced, multiple spiral mounting holes can be formed in the support wheel, so that more support stud can be inserted so as to improve the supporting effect of the support device.

The invention relates to automatic laser engraving and code reading equipment for an oil spraying nozzle. An indexing disc is provided with a loading and unloading station device, an ID (identity) recognizing station device, a laser engraving station device and a two-dimensional code detecting station device; the loading and unloading station device comprises a clamping mechanism, an air cylinder and a fixed block, wherein the piston rod of the air cylinder is connected with the clamping mechanism in a driving way, the fixed block is arranged below the clamping mechanism and on a lifting rotating platform, and the lifting rotating platform is arranged on a lifting-platform lifting device; the ID recognizing station device comprises two CCD cameras, wherein one CCD camera is arranged over the ID recognizing station device, and the other CCD camera is arranged on the side surface of the ID recognizing station device; the laser engraving station device comprises a laser engraving machine and an exhausting system, wherein the exhausting is arranged on the side surface of the laser engraving machine; and the two-dimensional code detecting station device comprises a camera and an industrial personal computer, wherein the camera is connected with the industrial personal computer. The automatic laser engraving and code reading equipment has high processing qualification rate and high efficiency and can monitor the production process on line in real time.

The invention discloses a machining method of a fixed starting point thread. The machining method comprises the following steps: machining an outer-diameter size of a part to a thread to be machined state; then carrying out axial tool setting and circumferential tool setting respectively; finally, machining the fixed starting point thread according to a determined tool starting point. By adopting the machining method of the fixed starting point thread, the precision of a fixed starting point position can be effectively improved, and a difficulty barrier of machining the fixed starting point thread is broken; the reliable machining quality is guaranteed, and size consistency and interchangeability are good; the machining method of the fixed starting point thread has the effect of improving the machining efficiency and the yield.

The invention provides a machining method for online measurement and compensation of a high-precision blade, which can effectively solve the problem of measurement errors caused by regulating the errors through manual measurement and also can improve machining stability and efficiency of the blade size and improve five-axis machining acceptability of a diamond-shaped square steel blade. The method comprises the steps of: (1) setting online measurement parameters during programming; (2) conducting semi- finish milling for four sides of a root and a shroud of the blade, with single-side allowance of 0.2mm; (3) after completing the semi-finish milling, conducting online measurement respectively over both side surfaces of the root and both side surfaces of the shroud of the blade with a machine tool measuring head, calculating the deviation between the online measured value and the theoretical value set in measurement program to obtain a single-side deviation value, namely a compensation value of a cutter; (4) conducting finish milling for the blade by the machine tool, and during machining, regulating the corresponding cutter length via a program by respectively using the compensation values of the cutter, which respectively correspond to the root and the shroud of the blade, and controlling the finish milling of two side surfaces and two radial surfaces of the root and the shroud of the blade.

The invention relates to an automatic manifold production line which comprises automatic feeding equipment, a mechanical arm, pipe bending equipment and pipe end forming equipment. The mechanical arm serves as a pipe conveying device, and pipes in the automatic feeding equipment are sequentially conveyed into the pipe bending equipment and the pipe end forming equipment through the mechanical arm. Precise positioning is carried out through an in-place induction device, and therefore automatic control is achieved, and the functions of improving work efficiency and lowering cost are achieved.

The invention relates to a machining method for parts, in particular to a machining method for guaranteeing shape completeness of air inlet and air outlet side circular arcs of a blade. According to the technical scheme, a longitudinal numerical control milling mode is adopted for machining the profile of the blade, and the profile of the blade is divided into four machining regions which comprise an air inlet side circular arc region, an air outlet side circular arc region, a blade basin profile region and a blade back profile region; the two machining regions of the blade basin profile region and the blade back profile region are controlled through a numerical control program and machined in a normal tool path mode, and the two machining regions of the air inlet side circular arc region and the air outlet side circular arc region are controlled through a numerical control program and machined in an encrypted tool path mode. According to the machining method, through improving numerical control milling and polishing modes, on the premise that in the machining process of the profile of the blade, machining efficiency is not affected too much, an improvement on the machining quality of the air inlet and air outlet side circular arcs of the blade is guaranteed, and the qualified rate of the machined profile of the blade is increased.

The invention relates to a production control method for improving the curvature of a 42CrMo bar, and the method comprises heating, rolling and cooling control procedures. A walking beam furnace is adopted in the heating procedure, and the heating procedure sequentially comprises a preheating section, a first heating section, a second heating section and a soaking section, wherein the temperatureof the preheating section ranges from 600 DEG C to 720 DEG C, the temperature of the first heating section ranges from 950 DEG C to 1,060 DEG C, the temperature of the second heating section ranges from 1,060 DEG C to 1,130 DEG C, the temperature of the soaking section ranges from 1,080 DEG C to 1,120 DEG C, and the total heating time ranges from 120 min to 180 min. The 42CrMo bar produced by themethod has better curvature index and uniform structure, the quenching cracking ratio of the 42CrMo bar is reduced in the subsequent machining process, and the machining efficiency and the percent ofpass of user products are improved.

The invention provides a tool for a pocket hole of a short cylindrical roller bearing retainer and a pocket hole method of the tool, relates to a tool for the pocket hole and the pocket hole method of the tool, and aims to solve the problem that due to the inconsistency between the axial position degree and the circumferential position degree of the pocket hole, the processing quality of the retainer is affected. According to the tool, a locating shaft is installed on a workbench in a rotatable mode, a locating rotating shaft is installed in a center hole formed in the locating shaft in a sleeved mode, and the retainer is installed on the locating shaft; a cover plate is installed on the retainer in a press mode, a stepped hole is formed in the middle of the cover plate, and a press block is installed in the stepped hole of the cover plate in a rotatable mode; and a press rod is vertically screwed into the press block, a screwing rod is horizontally arranged at the upper end of the press rod in a penetrating mode, and a locating pin is detachably inserted into the pocket hole of the retainer. The method comprises the steps that the tool for the pocket hole of the retainer is installed; the retainer is fixed; the position of the pocket hole to be broached is determined; the work of preparation before broaching is conducted; after a broaching machine is started, broaching of the pocket hole is accomplished; and broaching is conducted repeatedly until broaching of the pocket hole of the retainer is accomplished. The tool for the pocket hole and the pocket hole method of the tool are used for production of the bearing retainer.

The invention discloses a two-sided milling fixture for blank forming molds. The two-sided milling fixture comprises a base, movable support clamping mechanisms, a movable centering mechanism and a middle fixed support clamping mechanism. The middle fixed support clamping mechanism is mounted in the middle of the base, the movable support clamping mechanisms are mounted at two ends of the base, and the movable centering mechanism is mounted between a fixed mechanism and a movable mechanism on the base. The two-sided milling fixture for the blank forming molds has the advantages that operation in processing parts is facilitated, adjustment during mold changing is facilitated, work time is saved, positioning precision is high, production precision is guaranteed, and process yield is increased. Since the two-sided milling fixture is a double-station fixture capable of processing two parts each time and the two parts share the same middle positioning and clamping device, cost is saved while processing efficiency is improved.

The invention discloses a self-adaptive processing method for front and rear edges of an aero-engine stator blade. The self-adaptive processing method adopts a space geometry self-adaptive processingtechnology, acquires coordinate data in corresponding areas of front and rear edges through a non-contact type measuring system, and processes the data. A needed process model is constructed and processed according to scanning data and a theoretical model, and a self-adaptive tool location file is generated according to a current part, so that processing of the blade is completed. The method breaks through the conventional manual polishing way and the numerical-control processing way, increases a processing qualification rate of the front and rear edges of the blade, reduces processing cost, solves the problems that front and rear edges of mounting-plate-free stator blades are unqualified in dimension precision and edge formation in a processing process, a jointed tool on the processed surface is difficult to eliminate, and the like; and the optimized processing process is stable, and a great deal of manual intervention is reduced. The self-adaptive processing method has relatively strong universality and practicability.

The invention discloses a method for machining a flat groove on the front edge of a low-pressure air intake guide blade of an aeroengine, which mainly comprises: clamping the two ends of a blade and the middle blade profile part on the back of a blade basin by using a tool clamp, and fixing the blade on the working table of a miller; and coarsely grooving and completing main machining amount by using a side and face milling cutter, finely milling the residual amount by using an arc-shaped milling cutter matched with the arc shape at the bottom of the groove, and machining the flat groove by designed size and shape. The machining method disclosed by the invention solves the problems of cutter clamping, blade breaking, blade through milling and high rejection rate of the machining of the flat groove on the front edge of the low-pressure air intake guide blade of the aeroengine in the prior art, increases the low-pressure air intake guide blade machining rate to 90 percent from the original 50 percent, and greatly reduce the machining and manufacturing cost of the blade.

The invention discloses a carving machine capable of achieving quick and stable feeding. The carving machine comprises a work table and a carving machine head arranged above the workbench and used for processing a workpiece. A plurality of strip-shaped grooves which are formed at intervals and are in parallel with one another are formed in the table surface of the work table; an overturning device is arranged on one side of the work table and comprises a rotary shaft, a plurality of strip-shaped rods with one ends being fixed to the rotary shaft and a driving mechanism used for driving the rotary shaft to rotate, the rotary shaft is located at one ends of the strip-shaped grooves and movably connected with the work table, and the length direction of the rotary shaft is perpendicular to the extending direction of the strip-shaped grooves; the strip-shaped rods are arranged at intervals in the length direction of the rotary shaft, and the rotary surface of any strip-shaped rod and the surface where the corresponding strip-shaped groove is located are located in the same plane; and the side, away from the work table, of any strip-shaped rod is provided a boss. According to the carving machine capable of achieving quick and stable feeding, the workload of a worker can be effectively reduced, the working efficiency is improved, the breakage rate of plates is decreased, and the processing pass percent of a product is increased.