92results about How to "Guaranteed shape and position accuracy" patented technology

The invention discloses a machining method of a perpendicularly intersected hole system of a speed reducer body. Holes A-B on the vertical axis are machined by a vertical numerical control machining center so as to meet the concentric requirement of the holes on the axis, and simultaneously, a section of horizontal hole is bored based on the vertical axis; the horizontal hole is long in length, only a section of horizontal hole is bored to be used as an aligning basis in order to ensure the machining precision so as to avoid a mark error, so that the section of horizontal hole is used as an aligning basis for machining a horizontal hole V. In the same way, a hole V on the horizontal axis is machined by a high-precision numerical control boring and milling machine by not using a mark as an aligning basis but on the aligning basis on which the vertical holes are machined, and the aligning precision is high; and meanwhile, the space laser detection technology and the numerical control machining technology are matched to ensure the form-position precision of the perpendicularly intersected hole system of the body. The fine surface finishing technology and the numerical control simulation technology of a high-precision numerical control machine are applied to select reasonable cutting amount to meet the low roughness requirement of the surface of the perpendicularly intersected hole system of the body. Through the machining method, the amount of adjustment of assembly is greatly reduced, and the assembly precision is improved.

The invention discloses a grinding tool for a reheating main valve seat of a steam turbine. The reheating main valve seat of the steam turbine comprises a cylinder body, wherein a conical valve port is formed at the bottom of the cylinder body. The grinding tool comprises a screw rod, wherein the top of the screw rod is provided with a handle, while the bottom is provided with a conical lapper; the conical lapper adapts to the conical valve port; the screw rod passes through a guide flange and is connected with the guide flange in a sliding way; a nut is arranged above the guide flange and is in threaded connection with the screw rod; and a spring is arranged between the nut and the guide flange. The guiding tool performs guide positioning on the screw rod by using the guide flange, so that the conical lapper and the conical valve port are matched with each other more tightly and better grinding effect is achieved. The length of the screw rod in the cylinder body can be adjusted conveniently through the spring and the nut, so that the conical lapper is prevented from being collided with the grinding surface of the conical valve port and the conical valve port is prevented from being damaged. The invention has the advantages that: the grinding tool has a simple structure, is convenient to manufacture, and is reliable and practical.

The invention discloses a device for measuring the axial internal clearance of a matched angular contact ball bearing, which relates to the technical field of bearing performance detection. The device comprises a load block (1), a centering sleeve (2), an inner space ring (3), an outer space ring (4), a washer (5) and a measuring instrument (7), wherein the centering sleeve (2) is arranged on a platform of the measuring instruments (7), the washer (5) is sleeved on the centering sleeve (2), measured bearings (6) are sleeved on the centering sleeve (2), the lower surfaces of the inner rings ofthe measured bearing (6) are supported by the washer (5), the load block (1) is arranged on the measured bearing (6), the inner space ring (3) is connected with the inner rings of the two measured bearings (6), and the outer space ring (4) is connected with the outer rings of the two measured bearings (6). The device provided by the invention has the advantages of simple structure, low cost, and high accuracy, and is convenient in operation, therefore, the device is suitable for the bearing processing factories in various sizes.

The invention discloses a silencer support frame welding mold, which comprises a bottom plate, a silencer positioning assembly and a silencer support frame positioning assembly, wherein the silencer positioning assembly comprises an exhaust pipe positioning assembly and a silencer casing positioning assembly, the silencer support frame positioning assembly comprises a positioning guide plate and a moving pin assembly, and a silencer support frame is aligned with a welding point of a silencer casing through being positioned behind a moving pin. The silencer support frame welding mold adopts a multi-point fast positioning structure and comprises the exhaust pipe positioning assembly, the silencer casing positioning assembly and the support frame positioning assembly, and in addition, the fast driven moving positioning structure is combined, so the welding positioning process is standardized, the form and position accuracy of the welding processing can be ensured, the work efficiency is improved, the additional stress after the installation of a silencer is reduced or even eliminated, the service life is prolonged, the work intensity of operators is reduced, and the production cost and use cost are saved.

The invention relates to a machining method of threads, in particular to the machining method of coarse pitch threads. The machining method comprises the following steps of building a right-angle trapezoidal thread finish machining outline and rough machining outline mathematical models; designing cutter paths according to the physical dimension of a designed non-standard cutter; building a numerical control macroprogram by applying the rough machining outline and cutter path mathematical models, selecting appropriate cutting parameters according to tool nose fillet radius R0.8 and combining with actual machining equipment and building a numerical control macroprogram by applying thread right-angle side finish machining outline and cutter path mathematical models, mathematical models right-angle sides by repeatedly feeding, and adopting sample plate and feeler gauge detection until required accuracy is achieved; and adjusting numerical control macroprogram contents, using the sample plate and feeler gauge to detect in a matched mode and completing machining of right-angle trapezoidal thread slope side according to machining results. The machining method is unique in process method, capable of effectively guaranteeing thread accuracy of forms and positions and surface smoothness, improving processing efficiency and shortening machining period.

The invention relates to a medium-speed wire cutting method based on a high-speed wire cutting machine tool, which is characterized in that the high-speed wire cutting machine tool used as a carrier is modified into a medium-speed wire cutting machine tool. The method comprises the following steps: (1) adjusting the cutting precision +/-0.03mm of a high-speed wire cutting machine tool into +/-0.01mm of a medium-speed wire cutting machine tool; (2) adjusting the cutting surface smoothness Ra3.2-1.6 of the high-speed wire cutting machine tool into Ra0.8; (3) adjusting the cutting speed 40-60mm<2>/min of the high-speed wire cutting machine tool into 120mm<2>/min; and (4) modifying the control system of the high-speed wire cutting machine tool into medium-speed wire cutting to form a multiple-time cutting control structure, thereby enhancing the precision and surface smoothness of the machined workpiece. The invention can control the cutting precision within the range of +/-0.01mm, thereby effectively enhancing the cutting precision; and the invention uses an alkaline cutting liquid as the working liquid for the high-speed wire cutting machine tool, thereby reducing the surface roughness of the machined workpiece.

The invention relates to a mold manufacture method, in particular to a method for manufacturing a space complicated curve surface core box mold, which is applicable to ship support frames of deep water drilling ships and ocean exploration ships and is characterized in that the method comprises the following steps of: selecting materials, building a mold three-dimensional space model, manufacturing a main carrying steel frame, manufacturing a mold blank, processing the mold and carrying out mold detection. The method has the advantages that the method is unique, the intensity is high, the manufacture efficiency is high, the precision requirement of customers is met, the mold quality is improved, and in addition, the method is applicable to the ship support frames of the deep water drilling ships and the ocean exploration ships.

The invention provides numerical control equipment, wherein a main supporting frame is in a closed loop structure of which the opening faces the vertical direction; an X forward guide rail and an X backward guide rail which are matched with each other are arranged between the main supporting frame and an X-direction sliding seat; a Z-direction guide rod is a round guide rod; the Z-direction guide rod only can be installed together with a Y-direction sliding seat in an up-and-down movement way; a rotation stopping structure for preventing the Z-direction guide rod from rotating along the horizontal direction of the axis of the guide rod is also arranged; the rotation stopping structure comprises a third rotation stopping block, a fourth rotation stopping block, a third spring and a limit mechanism; an accommodation groove is formed in the top part of the Z-direction guide rod; the limit mechanism limits the third rotation stopping block and the fourth rotation stopping block to move in the setting range of the accommodation groove; a rotation stopping groove is formed in a guide hole matched with the Z-direction guide rod; the third spring is installed between the third rotation stopping block and the fourth rotation stopping block; and the third rotation stopping block protrudes from the outer periphery of the Z-direction guide rod and is matched with the rotation stopping groove. The numerical control equipment has the advantages that when a main processing head moves up and down, the stability is good and the imbalance torsion is not easy to generate.

The invention discloses a machining and positioning device for lining holes at two ends of connecting rod. The positioning device comprises a pressing mechanism, a bottom plate, a V-shaped support(10)fixed on the bottom plate, a floating support(9), a first bottom support(7), a second bottom support(8), and a side positioning block(1), the V-shaped support(10) is used for supporting and positioning the small head end of the connecting rod to be machined, the floating support(9) is arranged at the small head end of the to-be-machined connecting rod, the first bottom support(7) and the second bottom support(8) are arranged at the large head end of the to-be-machined connecting rod, the side positioning block(1) is arranged on one side of the large head end of the connecting rod to be machined, and the pressing mechanism presses and positions the large head end and the small head end of the connecting rod to be machined. The machining and positioning precision of the connecting rod sizehead hole can be improved, the accumulative error and the clamping and machining deformation are effectively avoided, the connecting rod large-head hole is ensured, the size and shape position precision of the small-head bushing hole are high, the precision is stable, the consistency is better controlled, and a good effect is achieved.

Numerical control equipment comprises a Z-direction guiding device, a sliding seat mounted with the Z-direction guiding device, a sliding seat fixing device, a sliding seat driving device, a workpiece clamping device and a main processing head, further comprises a Z-direction linear guiding rail accommodating hole which penetrates a Y-direction sliding seat and a convex part of the sliding seat, wherein the sliding seat comprises a sliding seat baseplate and a convex part; the convex part protrudes out of the sliding seat baseplate; a first fixing plane is arranged on the outer side surface of the convex part; the Z-direction guiding device comprises a Z-direction guiding rod and a Z-direction guiding rail driving device; one side surface of the Z-direction linear guiding rail accommodating hole is a second fixing plane parallel to the first fixing plane; two first Z-direction linear guiding rail orbits are fixed on the second fixing plane; second Z-direction linear guiding rail orbits are arranged on the Z-direction guiding rod; and the main processing head is arranged under the Z-direction guiding rod. The numerical control equipment has the advantages that the guiding effect is good; a rotating prevention structure is required to be designed additionally; and when the first Z-direction linear guiding rail orbits and the second Z-direction linear guiding rail orbits are abraded, all that is needed is to replace the first Z-direction linear guiding rail orbits and the second Z-direction linear guiding rail orbits.

Numerical control equipment comprises a Z-direction guiding device, a sliding seat, a sliding seat fixing device, a sliding seat driving device, a clamping workpiece device, a main processing head and an electric control device. The sliding seat is used for mounting the Z-direction guiding device, the Z-direction guiding device consists of a Z-direction guiding rod and a Z-direction guiding rod driving device, the Z-direction guiding rod is cylindrical, the sliding seat consists of a sliding seat bottom plate, an upper guiding sleeve and a lower guiding sleeve, the upper guiding sleeve and the lower guiding sleeve are perpendicularly convexly disposed on the sliding seat bottom plate, guiding circular through holes which are fittingly communicated with the Z-direction guiding rod are arranged in the upper guiding sleeve, the sliding seat bottom plate and the lower guiding sleeve, a rotation stopping groove is arranged on the Z-direction guiding rod, a Z-direction guiding sleeve which matches with the Z-direction guiding rod is disposed on a Y-direction sliding seat, a rotation stopping hole which matches with the rotation stopping groove is mounted on the Z-direction guiding sleeve, and the main processing head is arranged below the Z-direction guiding rod. The numerical control equipment has the advantage that a rotation stopping structure is simple.

The invention discloses a thin-walled shifting fork turning clamp, relates to the field of machining and in particular relates to the thin-walled shifting fork turning clamp which comprises a clamp main body, wherein the clamp main body is a cylindrical truncated cone; a plurality of stop dogs are arranged on one end surface of the clamp main body; two stop dogs are arranged on the clamp main body in parallel; each stop dog is connected with a bolt through a threaded hole; two cylindrical pins are also arranged on the clamp main body and are a center positioning pin and a limiting pin respectively; the center positioning pin and the stop dogs which are arranged in parallel with the center positioning pin are arranged on the circumference of a same circle; the center of the circle is coincided with the center of circle of the end surface of the clamp main body; threads are formed in the top end of the center positioning pin; and the top end of the center positioning pin is connected with a nut. The thin-walled shifting fork turning clamp has a simple structure, is convenient in operation, can well ensure the size, form and position accuracy when a workpiece is processed and improves the production efficiency.

The invention relates to a micro-milling burr inhibition method applied to a folded waveguide slow wave structure. The method comprises the steps that after a straight groove in the slow wave structure is generated through micro-milling machining, a cavity of the straight groove is filled with PMMA colloid; after the PMMA colloid is cured, micro-milling machining of an S-shaped groove in the slowwave structure is carried out; and after a workpiece is machined, the workpiece is placed in an organic solvent to dissolve a PMMA curing layer, and cleaning and drying are carried out, wherein the PMMA colloid is prepared by uniformly mixing polymethyl methacrylate and an acrylic curing agent according to the mass ratio of (1-1.4): 1. According to the micro-milling burr inhibition method appliedto the folded waveguide slow wave structure, the machined cavity of the straight groove is filled with the PMMA colloid in a coated mode to serve as an auxiliary supporting material, the PMMA colloidis used for enhancing the plastic deformation resistance of the boundary of a dispersed oxygen-free copper material in the cutting process, and then formation of burrs at the groove top, the groove shoulder and the island root is inhibited.

The invention discloses a full peripheral process unit for electric erosion machining valve bushes, and the full peripheral process unit provided by the invention can be used for improving the working efficiency and the machining precision, and the like. The technical scheme provided by the invention is as follows: the full peripheral process unit comprises an electrode assembly, wherein the electrode assembly is arranged corresponding to a valve bush fixedly clamped on a drive mechanism and can carry out axial or radial feed along the inner hole of the valve bush, the copper-tungsten alloy electrode of the electrode assembly is provided with raised shoulders, and the position and number of the raised shoulders are corresponding to those of throttling circular grooves of the valve bush; and the full peripheral process unit also comprises an oil groove for accommodating the valve bush. The full peripheral process unit disclosed by the invention is suitable for the processing of the valve bush with a plurality of throttling circular grooves.

The invention discloses a cultivator fender assembly and welding tool, which comprises a bottom plate, supporting columns, limiting blocks, a shim block, a fixed block, a movable pressing block and a compaction device, wherein the supporting columns are distributed on the bottom plate in a height adjustable manner and used for supporting two parts to be assembled and welded with fenders; and the limiting blocks are positioned on the edges of the two parts to be assembled and welded with the fenders, fixedly distributed on the bottom plate and used for limiting the freedom degree of the horizontal direction of the two parts to be assembled and welded with the fenders. By adopting a multi-point quick positioning structure comprising positioning in the vertical and horizontal directions and on the edges and combining a quickly driven mobile positioning structure, the welding positioning process is standardized and the form and position accuracy of welding can be ensured; and the tool is provided with the supporting columns capable of adjusting the height according to the requirement of the plate-like welding structure, so that bottom positioning is realized, the tool has adaptability to the irregular plate-like structure, the work efficiency is improved, the service life of the tool is prolonged, the labor intensity of an operator is reduced, and the production and using costs are saved.

The invention discloses a mold structure of a large double-hole pipe profile with horizontal reinforcing ribs and a processing method of the large double-hole pipe profile. The mold structure is characterized in that a broadening and flow-distributing combined mold is formed by adopting an upper mold and a lower mold; the periphery of the upper mold is provided with six flow distributing holes which are uniformly distributed, and the middle part of the upper mold has two horizontal and serial stepped type flow-distributing holes; the flow-distributing holes are horizontally broadened, the broadening angle is 23 degrees, and the broadening amount is between 150-200mm; a welding chamber of the lower mold is externally connected with a circle with the diameter being 600mm and the depth of the welding chamber is 40mm; the mold is made of a 4Cr5MoSiV1 hot-work mold, a CAD/CAM/CAE full-automatic processing method is adopted, the mold structure of the double-hole pipe profile is accurately designed, and the mold is treated by processes such as high-temperature quenching, tempering and nitridation, so that the improvement on the hardness value of the surface of the mold is ensured. The mold disclosed by the invention has the advantages that the structure is simple and reasonable, the welding quality in processing the pipe material is guaranteed, the high-quality large double-hole pipe profile with the horizontal reinforcing ribs can be processed, the manufacturing difficulty of the mold is reduced, and the service life of the mold is also prolonged.

The invention discloses a machining device and method for a double-thrust sliding bearing in the finish machining stage. The device comprises two sets of pressing plate combinations; a bearing alloy end face F is placed on a base positioning working face to be reliably attached to the base positioning working face; after a bearing is aligned, the first set of pressing plate combination penetrates through an inner hole to tightly press a bearing alloy end face E for finish machining of an outer circle and the second set of pressing plate combination is used for pressing the side face of an outer circular ring groove from the outer portion of the bearing, so that finish machining of an inner hole and an alloy end face E is conducted; then the bearing is turned over, positioning and pressing are conducted through a positioning cylindrical pin and the second set of pressing plate combination, and finish machining of the alloy end face F is conducted. The clamping force layout is reasonable; automatic centering is achieved when the bearing is turned over, and alignment is not needed; the problem that the form and location tolerance cannot meet the design requirement due to the fact that an existing machining device clamps the outer circle of the bearing and the quality problem that a machined alloy end face is prone to being scratched are solved, and the form and location precision and the product quality of a double-thrust sliding bearing are guaranteed.

The invention discloses a large thin-wall double-layer cylinder deep hole machining device and a machining method thereof. The device comprises a lathe, a fixing mechanism, a supporting mechanism anda guiding floating boring head, wherein the fixing mechanism is mounted on the end portion of a cylinder body, located on the outer side of a flange, and is used for fixing the cylinder body to a lathe flower disc of the lathe; the supporting mechanism comprises a supporting ring, the supporting ring fixedly sleeves the outer side of the cylinder body and is used for supporting the cylinder body by carrier rollers, and the guiding floating boring head is detachably mounted on a lathe boring rod of the lathe and is used for machining an inner hole of the cylinder body. According to the large-scale thin-wall double-layer cylinder deep hole machining device and the machining method thereof, the cylinder body is fixedly clamped on the lathe flower disc through the fixing mechanism, and the cylinder body deformation caused by clamping can be reduced; the cylinder body is supported by the carrier rollers of the supporting mechanism, the rigidity of a shell on the outer side of the cylinder body can be increased, and the cylinder body deformation caused by the supporting of the carrier rollers can be reduced; and meanwhile, the inner hole of the cylinder body can be machined through the guide floating boring head, so that the size precision, the shape bit precision and the surface roughness requirement of the inner hole machining can be guaranteed.

The invention particularly relates to a precision grinding device and method for a boron carbide gas bearing. The grinding device comprises a positioning seat, a compression nut, a positioning ring and an elastic check ring. A limiting protrusion used for being clamped on a grinding machine chuck and an external thread which is used for being connected with the compression nut are arranged on the outer wall of the positioning seat. A positioning ring bearing assembly is mounted in an inner hole of the positioning seat. A circular groove is arranged in the inner hole of the positioning seat. The elastic check ring is mounted in the circular groove. The boron carbide gas bearing to be machined is mounted on the inner wall of the positioning ring, and the two end faces of the positioning ring are in close fit with the elastic check ring and the compression nut respectively. The method of the grinding device comprises the steps of first mounting, second inner hole grinding of parts to be machined, third online repairing of an inner hole grinding diamond grinding wheel, fourth end face grinding of the parts to be machined, fifth online repairing of end face grinding diamond grinding wheels, and sixth disassembling after part machining. When the grinding device and method are used for machining boron carbide materials, the machining precision is high, and operation is convenient.

The invention relates to a curing forming tool and method for a honeycomb sandwich structure, particularly relates to the curing forming tool and method for a polygonal box-shaped composite material skin-aluminum honeycomb sandwich structure, and belongs to the technical field of curing forming of composite material honeycomb sandwich structures. A forming template is assembled by using compositematerial skin-aluminum honeycomb sandwich structure plates, the problem of large difference in the thermal expansion coefficient between the forming template and service products thereof is solved, and the risk of damage in the product manufacturing process is reduced. The forming template is formed by assembling split forming bottom plates and forming vertical plates, the configuration is simple,the manufacturing cost is low, and the split forming template is easier to separate from the products, so that the risk of damage is reduced when the products are separated from the curing forming tool. The split forming template can be provided with corresponding positioning openings and connecting openings according to different configurations and connecting opening layouts of a honeycomb sandwich structure to be formed, and is assembled and formed, so that recycle of the tool is facilitated.