10results about How to "Improve accuracy retention" patented technology

The invention discloses a non-contact adsorption porous ceramic suction cup and a manufacturing method thereof, a special gas circuit structure is arranged in a base, blowing airflow and adsorption airflow between the suction cup and an adsorbed workpiece are balanced, and non-contact adsorption clamping is realized by utilizing the comprehensive effect of gas suspension and vacuum adsorption prepressing; according to the invention, gas flows out on the whole porous ceramic surface, that is, a layer of gas film exists between the porous ceramic plate and an adsorbed workpiece, so that the adsorbed workpiece is uniformly subjected to the action of suspension force, and the problem of cracking of the workpiece caused by non-uniform stress in the non-contact adsorption process is further reduced; the vacuum adsorption holes distributed in the base are used for adsorption, the adsorption force is strong and stable, and the adsorption force equivalent to that of a common contact type porous ceramic suction cup can be obtained; due to the fact that the borne load is even, stable gaps can be formed between the porous ceramic plates, a precise plane is further formed, and high precision retentivity is achieved.

This invention discloses a machining process for precision screws, belonging to the field of mechanical manufacturing technology. It includes the following steps: S1, rough machining and forming: treating the surface of the bar stock and machining functional slot structures, followed by pre-deburring; S2, structural strengthening: heat-treating the workpiece for strengthening; S3, precision finishing: correcting the form and position tolerances of the heat-treated workpiece and precision grinding each surface; S4, quality assurance delivery: completing inspection, cleaning, and packaging. This process flow is clear, employing a logical arrangement of "forming first, then strengthening, and then fine-tuning," resulting in a workpiece with not only a high-hardness surface but also improved coaxiality of its stepped axis and thread trajectory accuracy. This significantly enhances the screw's operational stability at high speeds. Furthermore, through staged quality control and precision correction, it improves the first-pass yield of the workpiece and reduces the risk of scrap due to heat treatment deformation, possessing extremely high industrial application value.

The invention discloses an integrated air floating main shaft which is provided with a bearing outer ring and a bearing inner ring which are nested inside and outside and are in clearance fit, the top of the bearing inner ring is connected with an objective table and is driven to rotate, the bottom of the air floating main shaft is provided with an adjusting unit for driving the objective table to move in the Z-axis direction, and the bearing outer ring is fixedly connected. The adjusting unit is sealed in a counter bore formed in the bottom of the bearing inner ring through the lower end cover, the linear motor stator is fixedly connected to the lower end cover, the linear motor rotor is coaxially connected to the linear motor stator in a sleeved mode, and the linear motor rotor supports the bearing inner ring to conduct Z-axis direction adjustment. A cavity communicated with an air passage in the air floating main shaft is formed between the bottoms of the bearing inner ring and the bearing outer ring and the lower end cover, and the air pressure in the cavity is increased to balance the self weight of the bearing inner ring and the attachment thereof. According to the integrated air floating main shaft, the frequency of adjustment in the Z-axis direction can be greatly improved, and the volume duty and the energy efficiency of the air floating main shaft are optimized on the basis that the production efficiency and the product quality are improved.

The utility model discloses a bridge type gantry machining center of an overall lathe bed side hanging structure. Wherein the sliding seat is provided with an accommodating space; the ram is arranged in the accommodating space in a penetrating manner; wherein a transmission assembly is arranged in the ram; the driving assembly is arranged at the top of the ram and is connected with the transmission assembly; the connecting shaft is arranged outside the ram and connected with the transmission assembly, and the extending direction of the connecting shaft intersects with the extending direction of the ram; the main shaft is connected with the connecting shaft; when the driving assembly works, the main shaft is driven by the transmission assembly and the connecting shaft to rotate. In this way, the precision of machined workpieces can be improved.

The invention relates to the technical field of rolling mill housing repairing, and discloses a rolling mill housing laser remanufacturing process method. Firstly, auxiliary facilities and lining plates in a memorial archway operation area are dismantled, oil stain cleaning and polishing are conducted on a selected point of the memorial archway, and then the shape, position, size and damage condition of the memorial archway are measured and determined through a laser tracker. Then building a construction platform, configuring a robot, fixing the robot in a repair area, connecting a machining power device to a sixth shaft connecting plate of the robot to perform primary machining, treating a fatigue layer in different areas, performing PT detection on a repair polishing area, treating a defect area, and detecting the damage amount to determine the cladding thickness; and optical fiber laser with specific parameters and iron-based alloy powder are adopted for cladding. And after cladding, a floating grinding head is replaced, after finish machining, semi-finish machining and final finish machining are programmed according to an original datum point, a laser tracker is used for reinspection, and after inspection is conducted through an inside micrometer, equipment is detached for 6S management. The method is simple in process, low in cost, high in efficiency, safer and capable of improving the repairing quality, and the robot can complete multiple processes in place at a time.

The present invention relates to the field of gear processing technology, and in particular to a tooth profile forming grinding device for an internal gear with a multi-petal structure, comprising a machine tool cradle, the machine tool cradle is connected to a turntable of a machine tool, a V-shaped positioning seat is arranged on the upper surface of the machine tool cradle, a fifth locking screw is arranged at the bottom of the machine tool cradle, and is screwed into the positioning seat for connection and fixation, positioning baffles and pressure plates are arranged on both sides of the positioning seat, and a petal tooth mounting seat and a petal tooth connected to the petal tooth mounting seat are arranged on the top of the positioning seat, and are located between the positioning baffle and the pressure plate. The tooth profile forming grinding device for an internal gear with a multi-petal structure can convert the internal gear grinding into external gear grinding when the internal gear is decomposed into multi-petal teeth for grinding, thereby avoiding restrictions on the grinding wheel, significantly increasing the grinding wheel diameter, improving the grinding wheel precision retention, reducing the number of grinding wheel dressing times, and improving the grinding precision of the gear.

The invention discloses a metal material and a preparation method and application thereof, and relates to the technical field of surface treatment. The metal material comprises a metal base material, wherein a hardened layer is arranged on the surface of the metal base material; the surface hardness of the hardened layer is Vickers hardness of 550-700, and the depth of the hardened layer is 20-50 microns; the hardness of the hardened layer is gradually reduced from outside to inside; the inward fingers face the direction of the metal base material; and the metal base material and the hardened layer are metallurgically bonded. The metal material has excellent frictional wear performance, the problem of binding force failure is avoided through the metallurgical bonding mode, and in the aspect of products, the durability life is prolonged, and the precision degradation rate is increased. When the metal material is used in the flexible gear or the harmonic speed reducer, the service life of the flexible gear or the harmonic speed reducer can be effectively prolonged, the precision retentivity of the flexible gear or the harmonic speed reducer can be effectively improved, and the harmonic speed reducer product has the advantages of being long in service life, low in abrasion, high in precision retentivity and the like.

This invention relates to the field of CNC machine tool precision control technology, and discloses a method and system for precision control of heavy-duty CNC machine tools. The method includes: constructing a unified state sample set and a basic error characterization model; performing spatial error partitioning modeling; performing partition boundary transition compensation processing on a preset machining trajectory; performing adaptive feedback correction based on a first compensation trajectory; correcting and controlling CNC commands during the formal machining process; and outputting a precision control result set. Compared to the existing technology that uses a single position compensation method, especially under the condition of machining large, irregularly shaped workpieces across the entire stroke, it cannot achieve the technical problem of boundary area compensation transition. This application, by constructing a unified state characterization model including spatial position, axis load, and workpiece weight distribution, combined with spatial error partitioning and boundary transition compensation, achieves partitioned, continuous, and dynamic precision control of heavy-duty CNC machine tools under the entire machining domain and multiple working conditions.

The invention discloses a numerical control rotary table real-time feedback control device based on multi-source data fusion. The numerical control rotary table real-time feedback control device comprises a numerical control rotary table body, a multi-source data acquisition unit, a data fusion processing unit, an edge calculation module, a layered feedback control unit, a dynamic error compensation unit and a driving execution unit. The numerical control rotary table body adopts a cam roller gapless transmission structure; the multi-source data acquisition unit synchronously acquires position, temperature, vibration, torque and rotating speed full-dimensional data; the data fusion processing unit is used for realizing hardware-level data preprocessing; the edge calculation module is integrated with each unit onboard to realize local real-time calculation; the layered feedback control unit adopts a three-ring nested hardware control architecture; the dynamic error compensation unit is used for full-time dynamic compensation; all the units are electrically connected to form a full-hardware global closed-loop control system; the end-to-end response time of the device is less than or equal to 1ms, the positioning error is less than or equal to + / -0.5 arc second, the device is adaptive to various cam type numerical control rotary tables, and the localization of core parts of high-end numerical control equipment can be promoted.

The combined type planetary gear transmission speed reducer comprises an input shaft, a sun gear, a plurality of first planet gears, a first inner gear ring, a plurality of second planet gears, a second inner gear ring and an output shaft, the sun gear and the input shaft are coaxially arranged and driven by the input shaft, and the first planet gears are arranged on the outer side of the sun gear and are all externally meshed with the sun gear; the first inner gear ring is coaxially arranged on the outer side of the first planet gear and internally meshed with the first planet gear, the second planet gear and the first planet gear are coaxially arranged in the axial direction, the second inner gear ring is coaxially arranged on the outer side of the second planet gear and internally meshed with the second planet gear, the output shaft is connected with the second inner gear ring, and motion is input through the sun gear through the input shaft. The first planetary gear, the first inner gear ring and the second planetary gear are used for transmission, and finally output through the second inner gear ring and the output shaft. The invention provides a combined type planetary gear transmission speed reducer capable of eliminating a transmission gap.