11results about How to "Reduce grinding" patented technology

The invention relates to an ultra-long air valve alloy and a grinding method and device thereof, and belongs to the technical field of air valve alloy manufacturing. The method comprises the steps that a feeding table and a discharging table are placed on the left side and the right side of the centerless grinding machine correspondingly, and supporting devices used for fixing the air valve alloy are arranged on the sides, away from the centerless grinding machine, of the feeding table and the discharging table correspondingly; the air valve alloy sequentially passes through a feeding table, a centerless grinding machine and a discharging table and is fixed through the supporting device; grinding the air valve alloy by using a centerless grinding machine, wherein the grinding process comprises a rough grinding procedure and a fine grinding procedure which are sequentially carried out; the rough grinding procedure comprises a first rough grinding procedure and a second rough grinding procedure which are sequentially carried out; the grinding amount of each time of grinding is controlled to be the same, it is guaranteed that fluctuation generated by air valve alloy in the grinding process is relatively small, and roundness and straightness are guaranteed. And finally, accurate grinding treatment is conducted, and it is guaranteed that the surface quality and roughness of the air valve alloy meet the requirements.

The invention discloses a positive active material and a preparation method thereof, a positive pole piece and a battery, the positive active material comprises: a matrix, the matrix comprises a lithium iron phosphate material; the surface of the matrix is at least partially coated with the carbon coating layer; the change rate b of the cell parameter b value of the positive electrode active material in a 4.2 V charging state and a 2.5 V discharging state satisfies 0.2% lt; blt; 4%; wherein b = (b1-b2) / b1 * 100%, b1 is the b value of the positive electrode active material in a discharge state from 4.2 V to 2.5 V, and b2 is the b value of the positive electrode active material in a 4.2 V charge state. Therefore, the positive electrode active material has a stable crystal structure and relatively high compaction density, and the battery prepared from the positive electrode active material has relatively high energy density and excellent low-temperature performance.

This invention is a steel billet grinding process with a constant grinding wheel linear speed. First, the steel billet is automatically fed, positioned, and locked. A laser rangefinder detects the actual length of the steel billet and calibrates the grinding wheel to align with the billet's length center. Then, the grinding wheel is controlled to apply pressure and adhere to the steel billet, driving the billet to translate and complete the grinding of both sides. During the grinding stage at the billet's ends, the speed and pressure are automatically reduced to avoid over-grinding and sharpening at the ends. A trolley tilting mechanism rotates the billet 45° multiple times, cyclically grinding all sides and edges of the billet, using a repeated grinding method with decreasing feed depth to ensure grinding accuracy. Simultaneously, photoelectric switches on both sides of the grinding wheel monitor the wear on the outer circumference of the grinding wheel in real time, dynamically adjusting the grinding wheel motor speed to maintain a constant grinding linear speed, and simultaneously calibrating the distance between the grinding wheel and the billet to stabilize the grinding pressure. This invention effectively ensures uniform overall grinding quality of the steel billet and improves the grinding accuracy and stability of the billet's sides and edges.

This invention relates to the field of wheat milling technology and proposes a wheat milling device, comprising: a fixed box having a first feed inlet, a second feed inlet, and a discharge outlet on the lower part of its circumferential side; a milling assembly, with a first grinding roller and a second grinding roller located around a main roller, the first grinding roller positioned above the second grinding roller, the first feed inlet opposite to the feed position of the first grinding roller, and the second feed inlet opposite to the feed position of the second grinding roller, the material being discharged between the first grinding roller and the main roller and then entering the feed position between the second grinding roller and the main roller; a screen covering the outside of the fixed box, the material ground by the milling assembly entering the screen from the discharge outlet; a rotating ring rotatably disposed between the fixed box and the screen, the rotating ring having a scraper, one side of the scraper sliding against the inner side of the screen, the material on the scraper falling into the second feed inlet after the scraper rotates to the upper side. This technical solution solves the problem of low working efficiency in multi-stage milling in existing technologies.

The utility model provides a grinding clamp, an arc-shaped tool bit assembly and a shaver. The grinding clamp is provided with a grinding position, the grinding position is used for grinding the cutting edge of the moving blade into a preset shape, the grinding position comprises an inner annular groove and an outer annular groove, and the inner annular groove is matched with the inner ring shaving part; and the outer annular groove is matched with the outer ring shaving part. The arc-shaped cutter head assembly comprises a movable cutter and a net cover, and the net cover comprises an inner ring shaving part and an outer ring shaving part. The shaver comprises an arc-shaped tool bit assembly. According to the grinding clamp, the arc-shaped tool bit assembly and the shaver, the grinding amount of plane edging of the movable cutter is reduced, the grinding clamp is used for grinding the movable cutter subjected to plane edging, the cutting edge of the movable cutter is ground to be in an arc shape, then the arc-shaped tool bit assembly is obtained through matched grinding with the mesh enclosure, the movable cutter of the arc-shaped tool bit assembly is not prone to tipping, and the working efficiency is improved. The mesh enclosure is not thinned unexpectedly, the sharpness is good, the undesirable phenomena that the shaving time is short, the skin is shaved and the like are reduced, and the shaving experience effect is improved.

This invention relates to a household knife edge-fixed-angle grinding device. The purpose of this invention is to achieve fixed-angle grinding of the cutting edges of household knives. The invention includes a base (1), a fixed circular guide rail (2), a movable circular guide rail (3), a sliding fixed seat (4), a set screw (5), a bearing fixed seat (6), a deep groove ball bearing (7), a linear bearing (8), a shaft elastic retaining ring (9), an internal hexagonal head screw (10), an angle rotating shaft slider (11), an angle rotating shaft (12), a knife holder (13), a square-headed elongated cylindrical end set screw (14), a knife (15), a whetstone (16), and a whetstone seat (17). This invention is particularly effective for fixed-angle grinding of household knives with non-linear cutting edges.

The present invention provides a glass material for reheat pressing in which a crystal layer on the surface of the glass material does not invade the interior of the glass material during reheat pressing, and a method for manufacturing the same. The glass material for reheat pressing of the present invention comprises glass and a surface modification layer covering the glass, wherein the glass contains Li, Na, K, Rb, Cs and Fr components, and the total content of these components is 1.2% by mass or less, and the content of at least one of the Li, Na, K, Rb, Cs or Fr components in the surface modification layer is greater than the content of the component in the glass.

The invention relates to the field of powder coating preparation, in particular to a multi-stage grinding mechanism for powder coating preparation, which comprises a grinding machine body, a fixed shaft is vertically arranged in the middle of the grinding machine body, the fixed shaft is driven by a driving motor, and a fixed ring is fixedly mounted on the upper middle part of the grinding machine body and outside the fixed shaft; a filter screen frame is fixedly mounted outside the fixing shaft and below the fixing ring in the grinding machine body, a first grinding groove is formed in the top end of the fixing ring, and a second grinding groove is formed in the position, below the first grinding groove, in the fixing ring; according to the powder coating multi-stage grinding device, the grinding assembly is matched with the fixing ring, the filter screen frame, the fixing shaft and the driving motor, powder coating can be subjected to multi-stage grinding and then subjected to filtering and screening treatment, it is ensured that the particle size distribution of powder coating particles is more uniform, and too large or too small particles are avoided; and powder coating particles can be ground to be finer.

The application provides an assembly process for reinforcing a target machine, relates to the technical field of composite material target machine body assembly, and comprises the following steps: the assembly process is used for assembling the reinforcing target machine through an assembly tool, the assembly tool comprises a lower fixing device, an upper fixing device, a mold closing device, a wing positioning device, a horizontal tail positioning device and a fuselage limiting device, and the assembly process comprises the following steps: pretreating the upper fuselage skin and the lower fuselage skin after demolding; positioning the lower fixing device and the fuselage limiting device through positioning pins, connecting them through bolts and reserving a 5mm clamping gap, and placing the pretreated lower fuselage skin into the lower fixing device. The application provides an assembly process for reinforcing a target machine, effectively reduces the total artificial consumption in the assembly process, has high overall strength and high use reliability, and does not need subsequent secondary grinding.

The present invention belongs to the technical field of ball mills, and specifically is an adjustable ball mill for producing metallic pigments, comprising a cylinder; a support frame is installed at the bottom of the cylinder; a feed end cover is installed at the left end of the cylinder; a feed device is installed on the feed end cover; the cylinder is driven by a rotating device; an inner lining plate arranged evenly is installed on the inner ring surface of the cylinder by bolts; a plurality of grinding balls of different sizes are placed in the cylinder; an adjusting device is installed on the right side of the cylinder; the adjusting device comprises a mounting frame; the mounting frame is fixedly mounted on the support frame; a circular groove is opened on the top of the mounting frame; a discharge pipe is slidably connected in the circular groove, and the discharge pipe can slide back and forth in the circular groove; a discharge stopper is provided on one side of the discharge pipe extending to the cylinder; a cover is slidably provided on the right side of the discharge stopper in the cylinder; the present invention can adjust the grinding space inside the cylinder by arranging the adjusting device, thereby adjusting the grinding amount of the raw material.

The invention relates to the technical field of friction wear testing machines, in particular to multi-mode self-positioning friction wear equipment which comprises a main rotating shaft, the bottom end of the main rotating shaft is connected with an upper clamp, the upper clamp is of a cylindrical structure and is coaxially connected with the main rotating shaft, and a plurality of upper friction pairs can be installed at the bottom of the upper clamp; the plurality of upper friction pairs are circumferentially distributed around the main rotating shaft; the upper clamp is detachably connected with brushes between the adjacent upper friction pairs, and all the brushes are circumferentially distributed around the main rotating shaft; a lower clamp is arranged below the upper clamp and horizontally connected to the base in a sliding mode, and the top of the lower clamp can clamp a lower friction pair. By arranging a plurality of upper friction pairs, the stability of the upper friction pairs under the conditions of large load and high rotating speed can be improved, and the accuracy of a test result is improved; and the brush can sweep abrasive dust, so that the abrasion between the upper friction pair and the abrasive dust is reduced, and the test result is more accurate. And the lower friction pair can realize two modes of fixing and horizontal reciprocating motion under the clamping of the lower clamp.