46 results about "Steel piston" patented technology

The invention relates to turning and grinding composite equipment for machining an outer circle and an annular groove of a steel piston and a using method of the turning and grinding composite equipment, and belongs to the technical field of piston machining equipment. The equipment comprises a base, a stand column, a left planker, a right planker, a left workbench, a right workbench, a tool turret, a static pressure electric spindle and a rotating spindle, the stand column is arranged on one side of the base, and the left planker and the right planker are horizontally arranged on the two sides of the stand column respectively through servo lead screw systems; the left carriage and the right carriage are vertically provided with a left workbench and a right workbench through servo lead screw systems respectively, the left workbench is provided with a tool turret, the tool turret is provided with a machining tool, the right workbench is provided with a static pressure electric spindle, the lower end of the static pressure electric spindle is provided with a grinding wheel, and the other side of the base is provided with a rotating spindle. The outer circle of the piston is machined through turning, turning is replaced by grinding when the piston ring groove is machined, the machining precision of the piston ring groove is improved, the service life of the piston ring groove is prolonged, the structure is compact, operation is convenient, and the machining efficiency is high.

The utility model discloses a steel piston which is characterized in that an inclined oil hole platform is arranged at the bottom of an inner cavity of an inner cavity surface of a steel piston main body and protrudes out of the surface of the inner cavity surface, and an inclined oil hole communicated with a lubricating oil channel is formed in the inclined oil hole platform; cooling lubricating oil stored in the cooling oil cavity enters the contact faces of the connecting rod, the piston pin and the piston pin hole sequentially through the lubricating oil channel, the inclined oil hole and the oil hole in the connecting rod small end, the protruding inclined oil hole platform structure is easier to forge and form compared with a small pit structure, the blank manufacturing difficulty is lowered, and the machining efficiency is improved. The protruding inclined oil hole platform structure can better guide cooling lubricating oil in the cooling oil cavity to flow into the connecting rod and the piston pin, lubrication is provided for contact between the piston pin hole and the connecting rod and the piston pin, and the occlusion risk is effectively reduced. The lightweight design and the machining quality are both considered, and meanwhile the failure risk of the piston in an engine is reduced.

The invention discloses a welded all-steel piston and a manufacturing method thereof.The manufacturing method of the welded all-steel piston comprises the following operation steps that S1, a piston head and a piston skirt are preprocessed; s2, friction welding is conducted, specifically, the preprocessed piston head and the piston skirt are connected into a whole in a friction welding mode, and a closed inner cooling oil cavity is formed in the piston head and the piston skirt; s3, vacuum tempering is conducted; s4, the inner cooling oil cavity is filled with a removable sealing medium, specifically, the inner cooling oil cavity is filled with a removable solid sealing medium, and the whole inner cooling oil cavity and the oil hole are filled and sealed with the solid sealing medium; s5, finish machining is conducted, specifically, the piston body filled with the solid sealing medium is subjected to finish machining; and S6, the sealing medium is removed, specifically, the piston body subjected to finish machining is heated, so that the solid sealing medium is melted or softened, and the solid sealing medium is discharged out of the inner cooling oil cavity. According to the welded all-steel piston and the manufacturing method thereof, the cleanliness of the inner cooling oil cavity can be effectively improved, and the technological process is simplified.

The invention relates to the technical field of welding, in particular to multi-station steel piston laser welding equipment which comprises a piston assembly, a first welding gun and a second welding gun, the piston assembly comprises a head part, a skirt part and a pin seat, a square protruding block is arranged in the center of the head part, and groove bodies matched with the protruding block are pre-formed in the center of the skirt part and the center of the pin seat; the head part, the skirt part and the pin seat are assembled in an inserted mode through the protruding block and the groove body, a square top seam is formed by the protruding block and the end face of the pin seat, and annular side seams are formed in the contact face of the head part and the skirt part and the contact face of the skirt part and the pin seat. By arranging the moving assembly, the first welding gun and the second welding gun can be driven to move at the same time, the first welding gun is made to weld two annular side seams, the second welding gun is made to weld a square top seam, meanwhile, the side seams and the top seam are welded, only one-time pre-welding preparation operation such as preheating, heat preservation and clamping is needed, and the welding efficiency is improved.

The utility model provides a novel ultrahigh-pressure supercharger structure which is composed of an ultrahigh-pressure supercharger oil cylinder, a high-pressure cylinder connecting barrel, a high-pressure cylinder and the like. According to the working principle, the motor drives the oil pump, oil pushes the large piston, the large piston drives the small piston, and low-pressure media are converted into high-pressure media. Continuous pressure output is achieved through reciprocating motion of the piston, and the high-pressure one-way valve controls one-way flowing of media to ensure stable pressure. The supercharger can automatically reciprocate, so that the operation efficiency of the system is improved. The key parts are made of excellent materials, the high-pressure cylinder is made of high-strength alloy steel, the piston rod is made of high-strength alloy materials, and the sealing piece is pressure-resistant and wear-resistant. Meanwhile, an intelligent control system is arranged, working parameters can be adjusted, and a cooling and safety system is arranged to guarantee normal operation and operation safety of equipment. The wear condition of key parts needs to be checked regularly in daily life, oil quality in the oil cylinder is managed, the service life of equipment is prolonged, and stable performance is guaranteed.

The invention discloses a preparation process of a light-weight high-strength fine-grain steel piston, and belongs to the technical field of preparation of light-weight high-strength materials. According to the high-strength light-weight steel piston, 38MnVS6 steel is adopted as a finished product material, and the preparation method comprises the steps of sample upsetting and blank finish forging; carrying out friction welding treatment; performing multi-stage rapid heating and cooling heat treatment; and a tempering treatment process. The steel comprises the following chemical components in percentage by weight: 0.3 to 0.45 percent of C, 1.4 to 1.6 percent of Mn, 0.18 to 0.26 percent of Si, 0.01 to 0.015 percent of P, 0.04 to 0.05 percent of S, 0.12 to 0.2 percent of Cr, 0.08 to 0.1 percent of Cu, 0.018 to 0.026 percent of Al, 0.06 to 0.09 percent of V, 0.02 to 0.04 percent of La, 0.03 to 0.05 percent of Ce, 0.01 to 0.02 percent of Y and the balance of Fe. And finally, the lightweight piston with high tensile strength, yield strength, fatigue strength and the like is prepared, a workpiece of the lightweight piston can be used for a high-performance diesel engine or a ship engine, and the lightweight piston has a good industrial application prospect.

The invention discloses an engine high-strengthening steel piston lubricating structure which comprises a piston main cooling structure, and the piston main cooling structure comprises a main cooling cavity, an oil inlet channel and an oil return channel. The main cooling cavity is arranged in the top of a piston, close to a piston ring groove and of an annular cavity structure, and the upper portion of the main cooling cavity is connected with the top of the piston and a combustion chamber and used for absorbing heat transmitted by the wall face of the combustion chamber. The oil inlet channel is parallel to the outer circle of the piston, the upper portion of the oil inlet channel is communicated with the main cooling cavity, the lower portion of the oil inlet channel is communicated with the piston cooling nozzle, and the oil inlet channel is used for guiding external pressure lubricating oil into the main cooling cavity to cool the piston. Under the condition of splash lubrication of the engine, forced lubrication between the piston and the cylinder sleeve, between the piston ring and the cylinder sleeve and between the piston and the piston pin is increased, that is, lubricating oil entering the friction pair has certain pressure, an oil film can be established between the friction pair more quickly, and a better lubrication effect is achieved.

The invention relates to the field of steel piston phosphating treatment, in particular to a steel piston phosphating treatment method and system. According to the steel piston phosphating treatment method provided by the invention, through forced liquid drainage and synchronous purification, no liquid accumulation in a complex inner cavity is ensured, the defects of cross contamination and piebaldness are avoided, and the core pain point of steel piston phosphating is fundamentally solved; through the combined action of forced liquid drainage and synchronous purification, the thickness difference of phosphating films on the inner cavity and the outer surface of the piston subjected to phosphating treatment is smaller than 1 micron, corrosion resistance is uniform, and the product quality consistency is improved.

The utility model relates to the technical field of metal forging, and discloses a combined type cooling forming tool of a forged steel piston blank, which comprises a forging die, a plurality of cooling cavities are arranged in the forging die, and water supply mechanisms for injecting cold water into the cooling cavities are arranged on two sides of the forging die. A concentrated water return mechanism for converging cooling water is arranged at the bottom end of the forging die, a die cavity is formed in the middle of the top end of the forging die, and a cooling fan for air cooling of the top end of the piston blank is arranged at the top end of the die cavity; the water supply mechanisms are arranged on the two sides of the forging die, cooling water can be input into the cooling cavity in a staggered mode from different directions, the piston blank cooling uniformity is improved, the phenomenon that due to insufficient cooling of the flowing tail end, the piston blank shrinks and deforms is avoided, and the piston machining quality is improved; and the output cooling water can be converged through the centralized water return mechanism.

This invention relates to the field of seismic isolation bearing technology, specifically a horizontal seismic isolation bearing based on air springs, comprising a lower connecting steel plate, an upper connecting steel plate, a lead-core rubber bearing element, a supporting sliding element, a sector-shaped air spring, and a dust cover. The lead-core rubber bearing element is fixedly connected to the upper part of the supporting sliding element, and the supporting sliding element and the lower connecting steel plate are connected through sliding contact, forming a sliding friction pair. Multiple sector-shaped air springs are arranged circumferentially around the supporting sliding element, and the outer sides of the sector-shaped air springs are connected to steel limiting rings fixed to the lower connecting steel plate. The sector-shaped air springs are internally equipped with limiting devices and buffer rubber to prevent excessive displacement and compression damage. A dust cover is installed on the upper part of the steel piston rod of the sector-shaped air spring. The bearing of this invention can automatically adjust its working state according to the earthquake intensity, primarily using sliding and air springs during minor earthquakes, and activating the lead-core rubber for energy dissipation during major earthquakes, achieving intelligent graded seismic isolation.

The invention discloses a piston top detection clamp which comprises a base, a support, a main body, an end face positioning ring, a clamping assembly, an angle positioning assembly and a pneumatic control assembly. The steel piston top is positioned through a spigot formed by combining the outer circle, the top face, the main body and the end face positioning ring, the angular freedom degree is limited through the angle positioning assembly, then pneumatic three-point clamping is conducted through the clamping assembly, and therefore rapid and stable clamping is achieved. The device can ensure that the repeated positioning precision is less than 0.01, has the advantages of high detection efficiency, high positioning precision, compact structure, reliable decompression protection and the like, and is suitable for large-scale detection of the steel piston tops of the engines of the unmanned aerial vehicles.

The utility model discloses a low-temperature aluminum piston anti-loose structure for a reciprocating compressor, which comprises a piston body and a piston rod, a supporting ring is arranged on the outer circle of the piston body, and the low-temperature aluminum piston anti-loose structure is characterized in that the piston body is an aluminum pressure-bearing piston body, the piston rod is a steel piston rod, and the piston rod is fixedly arranged in a shaft hole of the piston body in a penetrating mode. A limiting step and a locking nut are arranged on the piston rod, mounting grooves are formed in the positions, corresponding to the front end and the rear end of the piston body shaft hole, of the piston body respectively, the mounting grooves are formed around the piston body shaft hole, steel pressure-bearing rings are arranged in the mounting grooves, and the limiting step and the locking nut are matched with the corresponding steel pressure-bearing rings in a limiting mode respectively. The aluminum piston is adopted, the weight is light, manufacturing is easy, the specific pressure of the supporting ring is small, and the service life is longer.

The invention discloses a steel piston ring groove stepped wear-resistant coating based on laser additive manufacturing and a preparation method of the steel piston ring groove stepped wear-resistant coating, and belongs to the technical field of material science and laser additive manufacturing. The wear-resistant coating is obtained by coating Fe-based soft transition powder and Fe-based hard wear-resistant powder, and the Fe-based soft transition powder comprises the following components in percentage by weight: 21 to 23 percent of Cr, 4 to 5 percent of Si, 1.5 to 2.5 percent of Mo, 12 to 14 percent of Ni, 0.1 to 0.2 percent of C, 1.4 to 1.8 percent of B and the balance of Fe; the Fe-based hard wear-resistant powder is prepared from the following components: 31 to 33 weight percent of Cr, 3.6 to 4 weight percent of Si, 1.8 to 2.1 weight percent of Ni, 3.8 to 4 weight percent of C, 1.8 to 2 weight percent of Cu, 0.3 to 0.5 weight percent of CNT, 0.3 to 0.5 weight percent of BNNT and the balance of Fe. The wear-resistant coating has a stepped structure of the soft transition layer and the hard working layer, so that the internal stress of the coating is reduced, and the bonding strength of the coating is improved; meanwhile, the high-heat-conduction phase is added and matched with the SiC hard particles, so that the performance of a high-fatigue area of the steel piston ring groove can be greatly improved, and the service life of the steel piston is prolonged.

The present invention discloses a friction welding device for a steel piston, comprising a skirt tooling and a head tooling. The skirt tooling comprises a first chassis, a spring sleeve, and a top core fixed to the first chassis and coaxially arranged with the spring sleeve, used to position the skirt to be welded so as to adjust the deviation of the skirt to be welded relative to the axis of the first chassis and capable of squeezing the skirt to be welded during welding; the head tooling comprises a second chassis and a center positioning block fixed to the second chassis, used to position the head to be welded so as to adjust the deviation of the head to be welded relative to the axis of the second chassis. The present invention also discloses a method applied to the above-mentioned friction welding device for a steel piston. The above-mentioned friction welding device for a steel piston can reduce the deviation of the piston head and skirt relative to the axis of the welding equipment before welding, and can improve the uniformity and consistency of the force applied to the piston welding surface during welding, thereby effectively solving the technical problems of coaxiality, poor quality of welding flash, and low weld strength in friction welding of steel pistons.

The present application discloses an internal positioning tooling for a forged steel piston and its positioning method, which includes a positioning seat, a support seat arranged at one end of the positioning seat, and a top support seat detachably connected to the other end of the positioning seat. The positioning seat is used for internal positioning of the blank. A convex portion is provided on the outer peripheral surface of the positioning seat, and the convex portion is used for clamping with the inner concave cavity of the blank. The top support seat and the support seat are respectively used for limiting both ends of the blank. The present application has the effect of improving the coaxiality between the outer circle of the piston skirt and the inner cavity.

The utility model relates to the technical field of piston welding machining, in particular to an auxiliary tool matched with piston welding machining and a piston welding device.The auxiliary tool comprises an air inlet pipeline, an air outlet pipeline and a slag collecting box; one end of the air inlet pipeline is connected with the cooling cavity inflow connector, the other end of the air inlet pipeline is connected with an external air source, and an air inlet valve for controlling air to enter is arranged in the air inlet pipeline; one end of the air outlet pipeline is connected with the cooling cavity outflow connector, and the other end of the air outlet pipeline serves as an air outlet. And a connected slag collecting box is arranged at the middle end of the gas outlet pipeline. The tool can help to solve the problems that welding slag is splashed in a cooling cavity in the electron beam welding process of an all-steel piston and the surface of an oil cavity on the side is ablated by a welding seam, airflow circulation is formed in the oil cavity of the all-steel piston, electron beams in the welding process are diluted through gas, the energy density of the electron beams is reduced, and ablation to the surface of the oil cavity is reduced; and meanwhile, the welding slag is rapidly cooled in the airflow and collected into the slag collecting box, and the problem of welding slag removal is effectively solved.

The utility model discloses a split press-fitting type aluminum piston, and belongs to the technical field of automobile braking. The piston comprises a steel piston head and an aluminum piston body, an installation hole is formed in the piston body, one end of the piston head is installed in the installation hole through interference fit of an outer spline and an inner spline, and an open groove is formed in the other end of the piston head to limit displacement of a brake shoe. Six petal structures evenly distributed circumferentially are designed at the end, away from the piston head, of the piston body, and flowing of brake fluid is facilitated. The steel piston head is used for bearing high load, the aluminum body reduces abrasion of a cylinder hole and achieves light weight, and spline connection ensures bonding strength. Compared with a traditional piston, the piston is light in weight, long in service life, high in braking efficiency and suitable for a modern automobile braking system.

The utility model provides an automatic alignment double-station multi-angle drilling and boring clamp for steel pistons. The automatic alignment double-station multi-angle drilling and boring clamp comprises a turnover workbench, two three-jaw chucks, a plurality of positioning pins, two pistons, a positioning core rod, a positioning block and a positioning screw. The two three-jaw chucks are symmetrically installed on the surface of the overturning workbench. The two pistons are respectively arranged above the two three-jaw chucks, and the plurality of positioning pins are respectively arranged between the two three-jaw chucks and the two pistons; the positioning core rod is connected into the piston in a pluggable mode. The positioning block is mounted on the surface of the three-jaw chuck; and the positioning screw is mounted on the positioning block. According to the steel piston automatic alignment double-station multi-angle hole drilling and boring clamp, machining position degree deviation caused by manual clamping is effectively avoided, the position accuracy of steel piston machining is greatly improved, the requirement of equipment such as an engine for high precision of the steel piston can be better met, and the production efficiency is improved. And the product quality of the steel piston is improved.

The application provides a steel piston and a manufacturing process, and relates to the technical field of internal combustion engine pistons.The application avoids the weld from the high-load area such as the top surface and the combustion chamber of the piston, reduces the influence of the welding defects in the weld on the piston, greatly prolongs the service life of the piston, and improves the reliability and safety of the piston operation;the laser beam welding process or the electron beam welding process is used to weld the weld, the weld is small, the surface is well formed, the weld quality is excellent, the flash of the weld does not exist in the cooling channel, the cooling oil can smoothly reach the top of the cooling channel, and the piston head is beneficial to cooling; the horizontal and vertical staggered arrangement of the weld can bear the external force received by the skirt, the connecting strength of the inner piston body and the outer piston body is higher, and the service life of the piston is prolonged; the piston head and the pin seat of the inner piston body are an integrated structure penetrating from top to bottom, the probability of fatigue fracture between the pin seat and the piston head is reduced in the long-time use of the piston, and the service life of the piston is prolonged.

The utility model discloses a large-caliber piston type regulating valve which is provided with a valve body, a guide cylinder is arranged in the valve body, a piston is arranged in the guide cylinder, O-shaped sealing rings are arranged between the piston and the guide cylinder, a piston driving device is arranged between a valve rod and the piston, the piston driving device comprises a first bevel gear, a second bevel gear and a gear box, the first bevel gear and the second bevel gear are arranged in the gear box, the lead screw penetrates through the gear box to be matched with the second bevel gear, and one end of the lead screw penetrating through the gear box is connected to the stainless steel piston; a groove is formed in the inner circumference of the rear end of the guide cylinder, the O-shaped sealing ring is located in the groove, a supporting copper ring is inserted in the groove, the rear end of the supporting copper ring is connected with a positioning ring, an annular gap is formed between the positioning ring and the end face of the rear end of the guide cylinder, the positioning ring is installed at the rear end of the guide cylinder through a positioning bolt, and an adjusting nut is installed on the positioning bolt. According to the piston driving device, the piston cannot be subjected to radial force, and meanwhile the piston can be effectively prevented from sinking.

The utility model discloses steel piston deburring equipment, which belongs to the technical field of steel piston processing devices, and comprises a base, a turntable, a first motor, an arc-shaped channel steel, a dust collector, a plurality of second motors and an elastic positioning ring, the first motor is fixedly mounted in the base, the arc-shaped channel steel is fixedly connected to the top surface of the base, and the arc-shaped channel steel is fixedly connected to the bottom surface of the base. The rotating disc is fixedly connected to the output end of the first motor, and the rotating disc extends into the arc-shaped channel steel; the multiple second motors rotate to drive the steel wire wheels to rotate, a steel piston blank is clamped into the positioning groove, the steel piston is abutted by elastic deformation of the elastic positioning ring, the first motor rotates to drive the rotary disc to rotate, the steel piston is fed to the multiple steel wire wheels to be rotationally polished and deburred, and then burrs on the steel piston are rapidly removed. Chippings generated by polishing are sucked into the dust collector, so that the deburring operation of the steel piston is simple and convenient, and the deburring efficiency is high.

A hot forging steel piston skirt trimming-punching-finishing three-in-one device and processing method for inhibiting hot deformation belong to the technical field of mechanical processing, and are directed to trimming punching production process control of hot forging steel piston skirt forgings with flash or needing punching or both. The four process controls of holding, trimming, punching and finishing of the hot forging steel piston skirt are realized through mutual cooperation of three high-temperature-resistant die springs, and the precision of the piston skirt is greatly improved. The trimming device is simple in structure and safe, can be classified according to different specifications of different cylinder diameter piston skirts, and can meet the high-precision trimming requirements of all hot forging steel piston skirts. The present application innovatively proposes the technical scheme of "three sets of customized rectangular springs cooperative control + synchronous composite process", and for the first time realizes "one clamping and three processes completed simultaneously" of the hot forging steel piston skirt, solves the hot deformation and efficiency bottleneck from the aspects of process principle and structure design, and has remarkable creativity and practicality.

To provide a method of lubricating a heavy-duty Diesel engine comprising steel pistons, and a crank-case lubricant composition achieving excellent piston cleanliness.SOLUTION: A method of lubricating a heavy duty Diesel engine includes lubricating steel pistons with a lubricant composition, which lubricant composition includes, (i) a detergent system consisting of one or more alkali earth metal sulfonate detergents delivering about 0.3 to about 1 wt.% of sulfonate soap to the lubricant composition, and (ii) a dispersant system including one or more polyisobutylene succinimide dispersants delivering at least about 5 wt.% of one or more dispersants to the lubricant composition, with one or more polyisobutylene succinimide dispersants having a number averaged molecular weight of from about 1200 to about 2500 and derived from a highly reactive polyisobutylene delivering more than 650 ppm of nitrogen to the lubricant composition.SELECTED DRAWING: None

The application discloses a high-adaptability air track moving-frame legless advanced support, which comprises a top beam, the top beam comprises two or more cross beams, a plurality of longitudinal beams are overlapped on the cross beams, piston round steels are arranged at the two ends of the cross beams respectively, and the piston round steels are connected with jacks arranged in the cross beam bodies. The support supporting force is not dependent on the support column support, the advanced support air moving frame is realized, the current advanced support occupies large ground space, and the deficiencies of the moving frame mode are solved, and the demand of the modern mine working face advanced support is met.

The utility model relates to a detection sample block which is cut out in the width direction of a welding surface of a steel piston, and at least one layer is cut out; the detection sample block is of a long-strip-shaped structure and comprises stretching sections close to the upper end and the lower end and a middle section between the two stretching sections, the thickness of the stretching sections is consistent with that of the middle section, and the width of the stretching sections is larger than that of the middle section. According to the utility model, the detection sample block and the sampling method are optimized, the detection sample block can meet quantitative strength detection, and the detection condition is similar to the actual operation condition of the steel piston, so that whether the welding quality meets the design requirement or not is accurately judged, and the welding production of the steel piston can be more effectively guided.

The steel piston comprises a piston body with a combustion chamber at the top and an inner cavity in the piston body, the piston body is composed of a first piston assembly and a second piston assembly, and the first piston assembly and the second piston assembly are fixedly connected through a first connecting position and a second connecting position. A closed cooling oil channel is formed inside the cooling oil channel; the first joint is arranged in a radial wall thickness area between the inner side surface of the cooling oil duct and the inner cavity of the piston; or is arranged in a wall thickness area between the surface of the combustion chamber and the inner side surface of the cooling oil duct and forms an included angle of 40-50 degrees with the axis of the piston main body; or the axial wall thickness area is arranged between the top surface of the piston and the cooling oil duct; the second joint is arranged in a radial wall thickness area between the outer side face of the cooling oil channel and the outer circle face of the piston body. By reasonably arranging the positions of the welding seams, the top face of the piston and the high-load area of the combustion chamber are avoided, the influence of welding flash or welding defects on cooling oil flowing is reduced, and the cooling efficiency is improved.

The utility model relates to a kind of steel piston can be assembled central cooling oil cavity structure, belong to piston technical field.Structure includes steel piston main body and cover plate, cover plate is arranged in the inner cavity of the lower part of combustion chamber of steel piston main body, cover plate and the bottom area of combustion chamber form central cooling oil cavity, the oil in central cooling oil cavity is used to the bottom area of combustion chamber is forcedly cooled, the temperature of the bottom area of combustion chamber is reduced to below 280 DEG C, effectively prevent the coking, carbonization phenomenon of oil occurs, solve the problem of oil premature aging deterioration due to the coking, carbonization of oil in the bottom area of combustion chamber.

The full-automatic flexible deburring workstation comprises a feeding channel used for feeding the pistons, a linear module is arranged on the feeding channel, a feeding position is arranged at the end of the linear module, a first polishing station is arranged on the inner side of the feeding channel, a first floating electric spindle is arranged on the first polishing station, and a second floating electric spindle is arranged on the first floating electric spindle. A first grinding robot is arranged on the outer side of the first grinding station, a first piston clamping device is installed at the tail end of the first grinding robot, a second grinding station is arranged on the inner side of the first grinding station, a floating carving and grinding machine and a second floating electric spindle are arranged on the second grinding station, and a second grinding robot is arranged on the outer side of the second grinding station. And a second piston holder is mounted at the tail end of the second grinding robot. The piston burr grinding device has the beneficial effects that the labor intensity of workers is greatly reduced, the grinding consistency and the removal rate of piston burrs can be guaranteed, meanwhile, the production efficiency is improved, and manpower and material resources are saved.

The invention discloses a lightweight cast iron piston, and relates to the technical field of pistons. The cooling oil cavity is formed in the piston body and close to the top position, and the cooling oil cavity is communicated with two oil holes formed in the bottom of the piston body. According to the light-weight cast iron piston, the cast iron material with the density lower than that of steel is selected and matched with the multi-position de-weight holes, weight reduction can be achieved from the two dimensions of the material and the structure, the weight of the piston is remarkably reduced compared with that of a steel piston of the same model, reciprocating inertia force is reduced accordingly, the load of an engine bearing is greatly reduced, and the service life of the bearing is effectively prolonged; meanwhile, the machining precision of the de-weighting hole is strictly controlled by means of a three-coordinate measuring instrument in the detection process, local stress concentration caused by a de-weighting structure is avoided, the stress peak value of the key part of the piston is controlled within the reasonable range of cast iron yield strength, and it is ensured that the structure reliability is not sacrificed; and the high-load requirements of high-power internal combustion engines such as commercial vehicles and engineering machinery are met.

The application discloses a manufacturing method of a stainless steel integral inner liquid inlet piston rod of a hydraulic support oil cylinder, and solves the problems of poor corrosion resistance of a traditional integral inner liquid inlet piston rod of a hydraulic support, high machining precision of a stainless steel deep hole, and welding-free hole plugging by improving a stainless steel piston rod machining process flow and adopting a process of fixed size, induction heating, local upsetting, quenching and tempering treatment, rough turning, fine turning, surface quenching, deep hole drilling, through hole drilling, joint hole milling, sealing hole plugging, grinding and polishing. The method shortens a machining process, simplifies a machining process, and is free of welding under the premise of guaranteeing mechanical properties and corrosion resistance of the piston rod, has important significance for improving production efficiency and corrosion resistance of the hydraulic oil cylinder piston rod, prolonging service life of the hydraulic support, and realizing efficient operation of coal fully-mechanized mining equipment in a mine.