89results about How to "Guaranteed cylindricity" patented technology

The invention discloses a hydraulic pressure breaking hammer selector valve and a manufacturing method thereof in the technical field of hydraulic components. The hydraulic breaking hammer selector valve takes a middle cylinder body as a valve body; a valve opening is formed on the valve body; an oil duct is communicated with the inner wall of the valve hole and led to a cylinder of the middle cylinder body; a valve jacket is arranged in the valve hole and matched with the valve hole; a valve plug is arranged in the valve jacket; and a valve cover is arranged on the end part of the valve hole. The selector valve is characterized in that the valve hole is an unthreaded hole; an annular groove is formed on the outer wall of the valve jacket corresponding to the position of an opening of the oil duct; and an oil hole communicates the annular groove with a centre hole of the valve jacket. The manufacturing method comprises the steps of processing the valve hole, the valve jacket, the valve plug and the valve cover; conducting heat treatment; and assembling finished products. The method of the hydraulic pressure breaking hammer selector valve has the advantages of processing conveniently, reducing processing difficulty and effectively ensuring precision. The selector valve has the advantages of high functional reliability, lower processing cost and suitability for batch production.

The invention discloses a processing technology of a robot RV speed reducer needle gear shell, and belongs to the technical field of robot RV speed reducer processing. The processing technology includes the steps that precise casting or forging is carried out on a needle gear shell blank; the needle gear shell blank is clamped after the surface of the needle gear shell blank is machined, and the rotation center of the needle gear shell blank is taken as a positioning reference; the end face of the needle gear shell blank, a bearing position of a roller pin bearing and bearing positions of two main bearings are machined; finish machining is carried out on the inner surface of the roller pin bearing according to the positioning reference; finish machining is carried out on a roller pin groove in line contact with a roller pin of the roller pin bearing according to the positioning reference; inner grooves are simultaneously machined in the bearing positions of the two main bearings in a finish machining mode according to the positioning reference; finish machining is carried out on the outer surface of the needle gear blank. The needle gear shell machined according to the steps improves machining precision and the parallelism degree of the bearing positions of the main bearings, guarantees coaxiality, the position degree and cylindricity of the main bearings after installation, achieves one-time clamping, can meet requirements of multiple process parameters, improves machining precision and installation precision of the needle gear shell, reduces accumulated errors, meets the high-precision requirements, and prolongs service life.

The present invention relates to a shaft sleeve retaining clamp. It includes seat body, clamp body and ejector pin positioned between above-mentioned seat body and clamp body. Said clamp body includes base seat and several jaws, on the upper portion of said base seat a conical hole is cut, said several jaws are uniformly distributed on the periphery of said conical hole, the lower portion of said base seat has a hollow cavity, and the base seat between the conical hole and hollow cavity is formed into an elastic portion, the upper end portion of said ejector pin is tightly supported on the elastic portion. Besides, said invention also provides its working principle and concrete operation method.

The invention discloses a hydraulic automatic clamp for turning a motor shell. The hydraulic automatic clamp comprises a hollow clamp body. A packing is installed on one side of the clamp body and provided with a packing conical hole matched with the outer diameter of a main shaft. The other side of the clamp body is provided with a blind flange. The blind flange is provided with a rotatable clamping mechanism. The clamping mechanism is connected with a pull rod. One end of the pull rod penetrates out of the packing conical hole. The pull rod is driven by a hydraulic rotating oil cylinder and matched with a main shaft conical hole. Under the drive of the pull rod, the clamping mechanism can rotate and clamp and fix the motor shell. The motor shell is clamped and fixed in a hydraulic automatic clamping mode, clamping is convenient, the clamping efficiency is high, the clamping rigidity is high, the clamping force is stable and adjustable, clamping deformation can be greatly reduced, the motor shell machining precision is improved, the cylindricity of 0.005 mm of a bearing housing can be ensured, the motor shell machining quality is improved, the cost is reduced, and benefits are improved.

The invention discloses a laminate structure of a stator iron core of a motor, which relates to the field of the motors and aims at solving the problems of the large harmonic wave and the high noise of the motors and the bad concentricity and the bad axiality of a stator. The laminate structure of the stator iron core of the motor is formed by splicing a stator yoke part (1) and a plurality of stator teeth (2); the stator yoke part (1) is annular; the stator teeth (2) are formed into a whole made of one material; the inner edges of the stator teeth (2) are round; the outer ends of the stator teeth (2) are embedded at the annular inner side of the stator yoke part (1) to form one stator iron core laminate; and a plurality of the stator iron core laminates are laminated to form a whole stator iron core. Preferably, the single stator tooth (2) is T-shaped, and two sides of the inner end of the single stator tooth are provided with flanks (3). By using the laminate structure of the stator iron core of the motor, a combined closed slot structure needed by a centralized winding is easy to achieve; the integral concentricity and the axiality of a stator laminate and the precision of an inner circle and an outer circle are guaranteed; the efficiency of the motor is improved; the harmonic wave is small; the noise is low; and the consistency of products is good. The laminate structure of the stator iron core of the motor is applicable to various motors, in particular to the motors used by new-energy-source automobiles.

The present invention provides a multi-cylinder engine cylinder hole ceramization fixture, comprising a bottom plate, a cylinder hole top sealing plate formed on the bottom plate, and a cylinder hole bottom sealing plate formed above the cylinder hole top sealing plate. A cathode electrolysis part with a cavity formed inside is press-fitted between the sealing plate at the top of the cylinder hole and the sealing plate at the bottom of the cylinder hole, and a liquid inlet communicating with the liquid inlet chamber is formed on the bottom plate and the sealing plate at the top of the cylinder hole. As well as the liquid outlet connected to the cavity, a communication hole connected to the liquid inlet cavity and the cavity is formed on the cathode electrolysis part. The invention also provides a multi-cylinder engine cylinder hole ceramicization device using the multi-cylinder engine cylinder hole ceramicization fixture, and a multi-cylinder engine cylinder hole ceramicization method. The jig for multi-cylinder engine ceramization according to the invention can realize the aluminum alloy ceramization process of the cylinder bore of the engine, so as to generate the required ceramic layer on the surface of the cylinder bore.

The invention relates to a sectional push boring machining process for camshaft mounting holes. The process comprises the following steps of: (1) performing rough machining and semi finish machining on the camshaft mounting holes which are blank holes; (2) performing fine boring on two bearing holes at the leftmost end; (3) arranging a guide cutter bar; (4) boring two holes in the middle; (5) arranging an extension bar; and (6) boring the last two holes. By the process, the accuracy, coaxiality and cylindricity of the camshaft mounting holes can be ensured, and the problem that deep and long coaxial bearing holes in a camshaft supporting body are difficult to machine is solved; and the process is particularly suitable for the conditions that a special tool for supporting cannot be arranged in the middle, and the travel of a machine tool or the size of parts is limited.

The invention discloses a method for machining an ultra-large roller. A vertical lathe is used for machining a bearing installing position located at one end of a roller shaft, a roller body is arranged outside the roller shaft in a sleeved mode, a boring mill is used for welding a reference block in the center of the side portion of the roller body, the upper reference face and the lower reference face of the reference block and the center of the roller shaft are symmetrically arranged, the vertical reference face of the reference block is perpendicular to the upper reference face and the lower reference face, the boring mill is used for machining a slewing bearing installing position at the other end of the roller body, and taper plates and a connector are correspondingly welded to the two ends and the top of the roller body. The coaxiality of the two ends of the roller is guaranteed, machining investment is reduced, and the application range is widened.

The invention relates to a special tool clamp for a wind driven generator one-piece bearing pedestal casting and a machining technology and belongs to the technical field of mechanical part machining. The special tool clamp comprises a box, a positioning device, a pressing device, an adjusting device and a supporting device. According to the special tool clamp for the wind driven generator one-piece bearing pedestal casting, a one-piece bearing pedestal lies one side to be clamped on the special tool clamp, a rotating workbench, bearing pedestal holes, a blast hole, an end face and peripheral faces complete finish machining through one time of clamping, the cylindricity and the coaxiality of the bearing pedestal holes in the two ends are guaranteed, the overturning frequency of the casting is reduced, the machining precision required in graph paper is achieved, production efficiency is improved, and production cost and labor intensity of workers are reduced.

The invention provides an aero-engine adjusting sheet machining tool and method, and relates to the technical field of machining. The machining tool comprises a clamp body (1), a pressing block (2), a taper positioning pin (3) and a cylindrical positioning pin (4), and a plurality of screw holes and a plurality of pin holes are formed in the center of the clamp body (1); the cylindrical positioning pin (4) is arranged in the pin hole; the pressing block (2) is arranged in the middle of the clamp body (1). The taper positioning pin (3) penetrates through the pressing block (2) and the clamping plate (102) at the same time. By means of the machining tool, the problems that machining procedures of the aviation adjusting piece are scattered, clamping is difficult, and machining efficiency is low are solved. The machining method is convenient to operate, the machining precision can be effectively improved, and the product machining quality is improved.

The invention discloses a numerical control flexible roll bending plate bending machine for a small-diameter thin-walled pipe body, and relates to the technical field of plate bending machines. A lower rubber-covered roller (6) is arranged on a rack (1), wherein a rotating shaft of the lower rubber-covered roller (6) is connected with a transmission device (2); a displacement sensor (5) is arranged between the lower rubber-covered roller (6) and an upper rubber-covered roller (7); piston rods of two oil cylinders (4) are connected with the two ends of the lower rubber-covered roller (6) respectively; a hydraulic station (3) is arranged at the lower end of the rack (1); a PLC (programmable logic controller) control cabinet (10) is arranged on one side of the hydraulic station (3); a die roller (8) is arranged on the upper side of the lower rubber-covered roller (6); the upper rubber-covered roller (7) is arranged on the upper side of the die roller (8); a die following constraint device (9) is arranged at one end of the die roller (8); a return device is arranged on the lateral surface of the rack (1). According to the plate bending machine, a flexible roll bending forming mode is adopted, so that the surface of a workpiece is difficult to scratch, the automation degree is improved, the production cost is lowered, the production efficiency is improved, the safety is improved, and the roundness and the cylindricity of formed workpieces are favorably ensured.

The invention discloses a valve element of a proportional electromagnetic valve. The valve element is installed in an inner hole of a static iron valve seat of the proportional electromagnetic valve. The axial position of the valve element is adjusted through the effect between a push rod and an adjusting spring. Two or more evenly-distributed flow adjusting grooves are formed in the outer circumferential wall of one end of the valve element and are axial flow passing grooves, and the notch sectional area of each flow adjusting groove is the largest at the end of the valve element and gradually reduced to zero along the outer circumferential wall of the valve element. The invention further provides the proportional electromagnetic valve with the valve element. By the axial flow passing flow adjusting grooves, liquid directly flows to a high-pressure pump oil channel through the flow adjusting grooves, the environment of a flow field is improved, the interaction effect between liquid pulsation and valve element final motion is reduced, the evenly-distributed flow adjusting grooves are good in alignment, the flow direction of the liquid is better optimized, and eccentric wear caused by long time work of the valve element is reduced. The valve element is reasonable in structural design and easy to machine, and the wall thickness of the valve element is increased, so that deformation of the valve element is not likely to happen.

The invention discloses a non-contact packed piston for an ultralow-temperature refrigerator. The non-contact packed piston is located in a cylinder, adopts a cylindrical structure, and comprises a cylindrical piston base body and a wear-resistant coating coating the outer surface of the piston base body, wherein the wear-resistant coating is cylindrical and has a certain thickness; a plurality of grooves are formed in the outer circular surface of the wear-resistant coating; and the inner circular surface of the wear-resistant coating takes the shape of a smooth cylinder matched with the outline of the piston base body. According to the non-contact packed piston, processing of the piston base body is avoided, stress changes in the cooling process are reduced, and the cylindricity of the piston base body in a low-temperature state is guaranteed to ensure the overall sealing performance.

The invention discloses a hydraulic drive internal combustion engine cylinder hole machining honing head and a hydraulic circuit thereof. The honing head is mainly composed of an input transmission shaft, a double-acting hydraulic cylinder, a single-acting hydraulic cylinder, an oil distribution disc and the like, wherein three rectangular grooves are evenly distributed in the inner surface of a cylinder body of the double-acting hydraulic cylinder in the circumferential direction; three rectangular convex keys are evenly distributed on the outer circle surface of a piston, and therefore the double-acting hydraulic cylinder can achieve axial reciprocating linear motion and can also achieve circumferential rotation motion; the single-acting hydraulic cylinder is composed of a honing body, apush rod, a reset spring, an oilstone base, an expansion and contraction spring and oilstone; the push rod can achieve linear reciprocating motion under the action of hydraulic force and the action of reset spring force; and two conical faces of the outer circle rotation face of the push rod are matched with the inner conical face of the oilstone base, and radial movement of the oilstone is achieved. According to the hydraulic drive internal combustion engine cylinder hole machining honing head and the hydraulic circuit thereof, internal combustion engine cylinder hole honing work is stable,and therefore the high precision level of the cylindricity and straightness of the internal combustion engine cylinder hole machining surface is achieved, and the work efficiency of an internal combustion engine and the cylinder hole surface quality are greatly improved.

The present invention relates to drilling tools and replaceable inserts therefor. The drilling tool has a base body (14) rotatable about a drill axis (36), and two insert seats are provided on the end face for accommodating replaceable inserts (20) of the same construction. The replaceable inserts each have a chip face (30) and a cutting face (24) adjoining the main edge (28) under the condition of forming a cutting wedge. The main edge of the replaceable insert forms a chisel edge interrupted by a central recess (60) at an angled central edge section (28'). The object of the invention is to reduce the risk of breaking off in the central region of the replaceable insert and to achieve better guidance of the knife. It is proposed for this purpose that the replaceable insert has on its cutting face an inclined guide bevel (56) extending from a top line (54) to the central insert corner (46), the radially outer region of the cutting face being at the It is positively inclined in the direction of feed and is inclined negatively in the direction of feed at its guide bevel.

The invention discloses a device and method for machining a groove profile of a wear-resistant rolling roller sleeve. The device for machining the groove profile of the wear-resistant rolling roller sleeve comprises a lathe bed, a riding wheel mechanism and an X-direction sliding base, wherein the riding wheel mechanism and the X-direction sliding base are fixedly arranged on the lathe bed; the wear-resisting rolling roller sleeve is rotationally arranged above the riding wheel mechanism; an X-direction sliding mechanism is fixedly arranged above the X-direction sliding base; the X-direction sliding mechanism is parallel to the axial direction of the wear-resisting rolling roller sleeve; a first sliding frame is arranged on the X-direction sliding mechanism in a sliding mode; a second sliding frame is fixedly arranged in the vertical direction of the first sliding frame; a Y-direction sliding mechanism is fixedly arranged on the second sliding frame; a Z-direction sliding mechanism is fixedly arranged at the side edge of the Y-direction sliding mechanism; a grinding mechanism is arranged on the Z-direction sliding mechanism in a sliding mode; and the first sliding frame, the Z-direction sliding mechanism and the grinding mechanism are electrically connected with a PLC control system. According to the device and method for machining the groove profile of the wear-resistant rolling roller sleeve, the wear-resistant rolling roller sleeve is good in outer circle consistency, high in machining efficiency and attractive in appearance, and the requirement for diversification of outer circle axial groove profiles is met.

The invention relates to a truck steering hydraulic force assisting oil cylinder and a production process thereof. The truck steering hydraulic force assisting oil cylinder comprises a cylinder barrel, oil nozzle joints, a piston and a piston rod. A guide sleeve is arranged in one end of the cylinder barrel, and a supporting seat is welded to the other end of the cylinder barrel. The guide sleeve and the cylinder barrel are fixedly connected through a steel wire check ring. The oil nozzle joints are welded to the cylinder barrel and the supporting seat. The guide sleeve is divided into a front part and a rear part, wherein the diameter of the front part is larger than that of the rear part. The piston rod penetrates the guide sleeve. Two sealing annular grooves are formed in the guide sleeve along the inner diameter. A sealing annular groove and a steel wire check ring groove are formed in the guide sleeve along the outer diameter. The production process sequentially includes the following steps of cylinder barrel rough machining, cylinder barrel wall drilling, oil nozzle joint welding, cylinder barrel inner hole finish machining, welding of the oil nozzle joints on the supporting seat, guide sleeve installation and other component installation. The oil nozzle joints are welded to the cylinder barrel more firmly, and outward leakage is avoided. After the oil nozzle joints are welded to the cylinder barrel, a cylinder barrel inner hole is subjected to finish machining, and the cylindricity and straightness of the cylinder barrel inner hole can be guaranteed.

The invention discloses a tool special for turning the excircle of a fork piece, which is characterized in that: a first nut is in threaded connection with a spindle; a spring is sleeved on the spindle; the excircle of the spindle is in clearance fit with an inner hole of a positioning sleeve; the excircle of the positioning sleeve is matched and welded with an inner hole of a V-shaped block; the excircle of a positioning block is in clearance fit with the inner hole of the V-shaped block; an inner hole of the positioning block is matched with the excircle of the spindle and is locked by a second nut; the V-shaped block is locked on a lathe spindle connecting disc through a bolt; the two lugs of a sliding fork are pressed against the V-shaped block; the inner space of the sliding fork is positioned by the positioning block; and a center sleeve is in taper fit with a center and is pressed against an inner hole of the sliding fork. Through the arrangement, the tool effectively prevents the fork piece from generating radial displacement under the action of extruding force when a cutter turns the fork piece, and ensures geometric tolerances such as the cylindricity of the machined excircle of the fork piece, the symmetry of the two opposite lugs, and the like.

The invention discloses a shaft end grinding method and tool. The shaft end grinding method comprises the steps that a grinding sleeve with a plurality of elastic grinding blocks is arranged, the multiple elastic grinding blocks are connected to the grinding sleeve, and one ends of the multiple elastic grinding blocks penetrate through the grinding sleeve to be inserted into the grinding sleeve; and during grinding, a shaft end sprayed with a coating stretches into the grinding sleeve, thus the multiple elastic grinding blocks elastically make contact with the coating on the shaft end, then the grinding sleeve is rotated, and the coating on the shaft end is elastically ground through the multiple elastic grinding blocks on the grinding sleeve. The shaft end sprayed with the coating can beground, the cylindricity of the ground shaft end is guaranteed, operation is very convenient and quick, the working intensity is lowered, and the working efficiency is improved.

The invention provides a rolling mill supporting roll precise grinding method. In the implementing process of the method, a roll grinder (4) is used, a dynamic and static pressing head frame (2) and adynamic and static pressing tail frame (3) are used for supporting a supporting roll (1), one end of the supporting roll (1) is machined firstly till the target diameter is reached, and then the supporting roll (1) is turned around to enable the other end of the supporting roll (1) to be machined till the target diameter is reached; and through the dynamic and static pressing head frame (2) and the dynamic and static pressing tail frame (3), the position, machined to be the target diameter, of the supporting roll (1) is supported, and then axial diameter grinding of other positions is conducted. According to the rolling mill supporting roll precise grinding method, one end of the supporting roll is machined firstly, then the supporting roll is turned around to enable the other end of thesupporting roll to be machined, and through the dynamic and static pressing head frame and the dynamic and static pressing tail frame, the position, machined to be the target diameter, of the supporting roll is supported; and through the grinding mode, grinding errors caused by supporting axial diameter original manufacturing errors can be eliminated, so that the requirement for high-precision grinding is met, and meanwhile the influence of supporting axial diameter sizes and the form and location tolerance of a traditional grinding mode on the grinding precision is eliminated.