Application of pipe processing equipment manufacturer in projec
Posted June 24, 2024
With the rapid development of industry, the technology of mechanical equipment has also been rapidly developed...
What is the importance of cnc pipe end forming machines automat
Posted June 24, 2024
cnc pipe end forming machines automatic technology. Now it is widely used in the electric power construct...
high quality din 41612 type e connectors: Secure connections fo
Posted June 24, 2024
high quality din 41612 type e connectors are a key connectivity solution in all areas, providing the key ...
din 41612 type f connectors wholesale: Fully isolated terminals
Posted June 24, 2024
In the wave of modern technology development, din 41612 type f connectors wholesale as a key connect...
anti-uv pet bottle packaging advantages with its application
Posted June 24, 2024
In the past, we went to the large store to buy snacks, candy bars and other food is the use of paper packaging...
The importance of the sealing performance of 16l sealed round p
Posted June 24, 2024
In the chemical industry, the sealing performance of packaging containers plays a crucial role in the preserva...
The custom grid knurling cutter is a core component in fields such as grain processing and feed production, and its condition directly affects production efficiency and material quality. To determine if it needs to be replaced, one must avoid the dual pitfalls of "replacing too early, wasting costs" and "replacing too late, causing faults". A comprehensive assessment should be conducted from four dimensions: surface wear, functional performance, equipment operation data, and compliance. The following are specific judgment methods and standards.
1. Surface wear degree: The most intuitive and core basis for judgment
The function of the custom grid knurling cutter relies on the abrasive texture on its surface. If the wear exceeds the critical value, it will directly fail. First, the texture depth can be detected: use a depth gauge with an accuracy of 0.01mm or a dedicated texture ruler to evenly select 3-5 detection points around the roller body's circumference (avoiding bearing positions), and measure the height difference between the texture protrusions and depressions. Different processes have different requirements for texture depth. For grain deshelling, it should be ≥ 0.3mm, for fine grinding, it should be ≥ 0.2mm. If the average depth is lower than 50% of the initial depth, or if the texture on a certain area is completely worn flat (depth < 0.1mm), then it needs to be replaced. For example, if the initial texture depth of the new roller is 0.5mm, and the average depth after use drops to 0.2mm, and the depth of the 3 detection points is < 0.15mm, it is no longer able to meet the requirements for material grasping and shearing, and it needs to be replaced immediately.
Second, pay attention to surface damage: if irreversible damage occurs, it should be directly judged as needing replacement. For example, if local pits or scratches have a depth > 0.5mm and an area > 5cm², the surface flatness will be affected, causing uneven force on the material; if the coating or chrome layer peels off with an area > 10%, the exposed base material has low hardness and the wear speed will accelerate, and it may also contaminate the material; if a crack with a length > 5mm is detected using a penetrating penetrant testing agent, even if the surface is not obvious, the internal crack will expand during operation, causing a risk of roller body fracture.
2. Functional performance: Judging the condition of the roller body from the production results
If the surface wear has not reached the critical value but there are continuous deteriorating material handling problems in production, and other factors such as gap adjustment and moisture content of the material have been ruled out, it is necessary to determine replacement. In the deshelling or deshelling scenarios, if the residual skin rate of the material exceeds the process standard (such as wheat residual skin rate > 3% and corn residual skin rate > 5%), adjusting the gap between rollers and the speed ratio still does not improve; in the grinding scenario, the particle size deviation is large, the proportion of over-coarse or over-fine materials exceeds 10% and 8% respectively, and the yield of qualified materials after screening decreases > 15%; for non-moisture-related issues (with moisture controlled at 13%-14%), frequent roller surface material adhesion occurs, requiring every 30 minutes to stop the machine for cleaning, which seriously affects continuity. These situations all indicate that the custom grid knurling cutter is no longer able to meet production needs.
At the same time, abnormal energy consumption and efficiency also need to be vigilant. Under the same material and production capacity, if the equipment current continuously increases > 10%, it indicates that the roller surface wear has led to a decrease in friction force, requiring a greater pressure or speed to maintain the effect, and in the long term, it will lead to generator overload; if the processing time per unit product increases > 20% and there are no other faults such as belt slipping or bearing jamming, it also means that the function of the custom grid knurling cutter has declined.
3. Equipment operation data: Warning signals for hidden faults
Some wear or damage is difficult to be directly observed, and it needs to be judged in combination with the equipment operation parameters. Measure the horizontal and vertical vibration velocities at the bearing seat of the roller body using a vibration detector. Normal values should be ≤ 0.1mm/s. If the vibration speed exceeds 0.2mm/s continuously, and bearing lubrication is adequate and factors such as material impurities are excluded, it is likely that uneven wear on the roller surface has caused imbalance in dynamic balance. Continuing to use it will exacerbate bearing wear and even cause bending of the roller shaft.
It is also crucial to establish an account ledger for the use of custom grid knurling cutters. Record the replacement time, total processing material volume, and maintenance status. For alloy cast iron rollers in grain processing, the normal service life is approximately 800-1200 hours (processing volume 800-1200 tons), while for oil-resistant coated rollers in feed production, it is about 500-800 hours (processing volume 500-800 tons). If it exceeds the corresponding lifespan by 10%, even if there is no obvious surface wear, there may be fatigue damage internally, and the risk of sudden failure is high.
Four. **And Compliance Risks: The Unbreakable Bottom Line
The food and grain industries must strictly adhere to the compliance bottom line. If the surface of the roller body shows rust or coating detachment, it may cause heavy metals or coating particles to mix into the materials, violating the "Metal Materials and Products for Food Contact" (GB 4806.9) standard; if there are minor cracks on the roller body (length < 5mm) or the connection between the roller shaft and the roller body is loose (with obvious gaps during shaking), continuing to use it may cause the roller body to crack during high-speed operation, triggering an accident. Even if the function is still acceptable, it is necessary to force replacement.
Through multi-dimensional assessment, one can accurately determine the replacement timing of custom grid knurling cutters, ensuring stable production and material quality while maximizing the utilization of the roller body's lifespan and controlling production costs.
custom grid knurling cutter https://www.rollerchina.com/knurling-cutter-g-grid2.html
Precision Grid Knurling is the main component of the quantitative ink supply system in flexographic printing machines. Besides, it is also regarded as the heart of the flexographic printing machine. The quality of Precision Grid Knurling directly affects the quality and effect of the printed products.
The ink transfer performance of Precision Grid Knurling refers to its ability and uniformity to receive and transfer ink. The ink transfer performance of Precision Grid Knurling is related to the shape of the mesh holes, the angle of arrangement, the capacity, as well as the number of lines and the materials used in the production of Precision Grid Knurling. The following will discuss the influence of these factors on the ink transfer performance of Precision Grid Knurling.
1. Mesh Hole Shape and Arrangement Angle
The opening shape of the mesh holes when viewed from above includes rhombic and regular hexagonal shapes. The opening of the regular hexagonal mesh holes is larger, thus having better ink receiving and transfer performance than the rhombic ones. The cross-sectional shape of the mesh holes is generally spherical, which makes the mesh wall smooth and conducive to ink transfer. The arrangement angle of the mesh holes is generally 30°, 45°, and 60°.
The 30° regular hexagonal mesh holes have better ink release and transfer performance, but the mesh wall on the surface of Precision Grid Knurling causes excessive wear between the ink knife and Precision Grid Knurling, and the mesh wall will disrupt the uniformity of ink flow. Therefore, 30° regular hexagonal mesh holes are difficult to produce a uniform ink film.
The 45° rhombic mesh holes have better working performance, but their mesh wall is generally 15-20 μm wide, resulting in a larger mesh gap and less uniform ink transfer. Moreover, the communication pipeline shape of the 45° rhombic mesh holes has a tendency to be too deep, which will reduce ink release, facilitate ink transfer, increase ink blockage at the bottom of the ink injection holes, and increase the difficulty of cleaning.
For 60° regular hexagonal mesh holes, due to their effective geometric shape, they can maximize the utilization of space, and the 60° arrangement method makes the mesh holes compact, that is, on the same area of Precision Grid Knurling surface, more mesh holes of the same size can be engraved, transferring more ink. Through mathematical calculation, it can be known that in the same area range, the space area occupied by the 60° regular hexagonal mesh holes is 15% more than that of the rhombic mesh holes, which means that the 60° regular hexagonal mesh holes can be engraved shallower without affecting the original capacity. Therefore, when transferring the same ink volume, the 60° regular hexagonal mesh holes can be engraved more shallowly, which is conducive to ink transfer.
The precision grid knurling with 45° and 30° arrangements is now generally only used for coating, laminating, and some special printing aspects. Ordinary flexographic printing does not use it anymore. The most widely used precision grid knurling with 60° arrangement is the one used in production.
2. Mesh Hole Capacity
Mesh hole capacity refers to the amount of ink that Precision Grid Knurling can accommodate per unit area under normal conditions. The unit is BCMin21010 μm3/in2. The capacity of the mesh hole is related to the depth and opening degree of the mesh hole. When the volume of the mesh hole is constant, the depth of the mesh hole is inversely proportional to the opening degree. Generally, the depth of the mesh hole is 23% to 33% of the opening (that is, if the opening of the mesh hole is 100 μm, then its depth is 23-33 μm, which is ideal at 28%).
The size of the mesh capacity has a significant impact on the enlargement of the dots in printing. A larger mesh capacity means a greater amount of ink is transferred, making the dots more likely to enlarge; while a smaller mesh capacity results in only a small amount of ink being transferred to the substrate during the printing process, which is beneficial for preventing dot enlargement and ink flying, and ensuring the quality of printing. Therefore, the mesh capacity should be as small as possible while meeting the ink transfer requirements. This also confirms that the 60° arranged regular hexagonal precision grid knurling is the best. This arrangement enables more equal volume mesh holes to be arranged on a unit area, and when the same amount of ink is transferred, the mesh holes can be made smaller.
III. The number of lines in precision grid knurling
The number of lines in precision grid knurling refers to the number of mesh holes per unit length along the axial direction of precision grid knurling, which determines the uniformity and ink transfer volume of precision grid knurling. The higher the number of lines in precision grid knurling, the closer the ink layer on precision grid knurling is to a "continuous" state. Additionally, the number of lines in precision grid knurling has a direct relationship with its capacity, so it has a significant impact on the ink transfer volume. When the number of lines in precision grid knurling increases, the opening area of the ink holes decreases, the capacity becomes smaller, and thus the ink transfer volume also decreases. Therefore, the higher the number of lines in precision grid knurling, the smaller the ink transfer volume.
The number of lines in precision grid knurling determines its applicable range. Generally, when printing large-area solid color blocks or images with less demanding requirements, a low-numbered precision grid knurling is considered: while for halftone or black printing, a high-numbered precision grid knurling is required to ensure that the opening area of the ink holes is smaller than the smallest dot area on the plate, thereby reducing dot enlargement. The mesh line number of precision grid knurling must match the printing mesh line number, with a ratio of approximately 51 for individual fine products, and this ratio may be higher for specific products. However, the number of lines in precision grid knurling is not always higher is better. A very high number of lines makes it difficult for the ink holes to release ink after ink application, resulting in insufficient ink supply and insufficient solid density, causing ink bleeding. Therefore, the selection of precision grid knurling should not only focus on the high number of lines in precision grid knurling, but also consider the printing density. In practical work, the number of lines must be reasonably selected based on different grades of printed products.
precision grid knurling https://www.rollerchina.com/knurling-cutter-g-grid.html
How to optimize China's machinery industry in the context of mass production of components?
In the scenario of mass production of components, the core of optimization for China's machinery industry revolves around three goals: "shortening the single-piece production cycle, enhancing processing consistency, and reducing overall costs". It is not a single adjustment but a systematic optimization from process design to on-site execution.
Firstly, the integration of processes is carried out. Relying on the power tool turret of CNC lathes and the Y-axis function, processes that originally required multiple equipment or multiple clamping operations can be combined. For example, the original process needed to first turn the outer circle and then reverse the clamping to drill the side hole. After optimization, through one clamping operation, the power tool head directly completes the drilling, tapping, and other processes, reducing the positioning error from two clamping operations and stabilizing the coaxiality and other geometric tolerances within 0.02mm. It also saves about 30% of clamping and production changeover time. For components with an annual production volume of tens of thousands, the compression of single-piece working time directly translates to an increase in production capacity.
Secondly, the scientific matching of cutting parameters is carried out, which requires considering the cutting tools, workpiece materials, and equipment rigidity, rather than blindly pursuing high indicators. When processing 45# steel for rough machining, using coated hard alloy cutting tools, setting the back clearance to 2-3mm, feed rate to 0.3mm/r, and cutting speed to 150m/min, the cutting efficiency is improved by more than twice compared to traditional high-speed steel cutting tools; in the finishing stage, using small allowances (0.2-0.5mm) and high rotational speeds (above 200m/min), ensuring a surface roughness of Ra1.6 or less, while stabilizing the tool life. For mass production of components, the tool change time accounts for 10% of the single-piece working time. With stable tool life, the tool change interval can be increased from the original 50 pieces to 200 pieces, indirectly reducing equipment downtime.
The optimization of the clamping process is the key to improving efficiency in mass production. The clamping time of a common manual chuck is usually 15-20 seconds per piece. By replacing it with a hydraulic pneumatic-driven automatic chuck, combined with soft jaws for pre-processing, the single-piece clamping time can be compressed to 3-5 seconds. For the mass production of specific components, a dedicated quick-change fixture can be designed, such as a rapid positioning structure combining positioning pins and V-blocks. The workpiece does not need additional alignment but only needs to be aligned to complete the clamping. For slender shafts, a hydraulic center frame that can follow the tool can be used, avoiding processing vibrations and ensuring straightness, while reducing the scrap rate from 2% to below 0.5%.
The optimization of NC programs and inspections is also important. Using CAM software to simulate the tool path, optimizing short paths for rapid movement, shortening non-cutting time; using subroutine calls to handle repetitive drilling and tapping processes, reducing the error probability; introducing an online measurement system, after rough machining, the outer diameter can be directly measured, automatically adjusting the finishing allowance, without the need for machine downtime for manual inspection, the dimensional consistency of each batch of workpieces can be improved by about 15%, and the inspection time proportion can be reduced.
Equipment maintenance and blank selection are the foundation for the implementation of optimization. Establish a preventive maintenance system, regularly inspect the accuracy of the tool turret and the gap of the guide rails to avoid sudden machine stops; blanks should preferentially use cold drawing or precision forging parts, compared to hot-rolled parts, the cutting allowance is reduced by more than 40%, directly shortening the cutting time; under the premise of meeting performance requirements, using easy-to-machine materials can further improve tool life and efficiency. These measures work together to compress the single-piece CNC processing time from the original 1 minute to within 30 seconds, reducing the overall cost by about 40%, and truly achieving efficient and stable operation in mass production.
China machinery industry https://www.hexincnclathe.com/the-machinery-industry-maintained-stable-production-and-operation-in-the-first-five-months.html
Stainless steel turning processing, TS-30 dual spindle CNC lathe - Which type should be chosen?
Stainless steel is a widely used difficult-to-machine material in mechanical processing. Austenitic, martensitic, and duplex stainless steels are extensively used in fields such as chemical engineering, aviation, and medicine due to their corrosion resistance and high strength. However, these materials have high plasticity and toughness, and their thermal conductivity is only about 1/3 of 45 steel. During cutting, they are prone to severe work hardening, chip formation, and tool bonding wear. Reasonable selection of TS-30 dual spindle CNC lathe is the core for ensuring processing quality and improving efficiency.
The selection of tool material is the foundation. For rough machining of stainless steel, the cutting load is high and the impact load is numerous. It is advisable to use WC-Co type hard alloy tools with balanced toughness and wear resistance, such as YG8 and YG6 grades with cobalt content of 8%-12%. These tools have strong impact resistance and are suitable for intermittent cutting during rough turning, capable of withstanding the heavy load of austenitic and martensitic stainless steel. If machining harder martensitic stainless steel (HRC40 or above), fine-grained or ultra-fine-grained hard alloys can be selected, such as YG6X. After grain refinement, the wear resistance is improved, effectively reducing tool wear. In the finishing stage, coated hard alloy tools should be used first, as the TiAlN coating has high temperature stability and low friction characteristics, which can form a heat-insulating lubricating layer during high-speed cutting, reducing chip formation and suitable for most stainless steel finishing. It should be noted that hard alloys containing titanium (such as YT types) are prone to chemical affinity with nickel and chromium elements in stainless steel, intensifying adhesion and wear. Generally, they are not used for austenitic stainless steel processing. For high hardness (HRC55 or above) stainless steel finishing, cubic boron nitride (CBN) tools can be selected. They have high hardness, good thermal stability, and weak affinity with iron elements, enabling high-speed hard turning and replacing the high-cost grinding process. However, the cutting allowance needs to be controlled to prevent chipping.
The optimization of tool geometric parameters is also crucial. The selection of the rake angle should take into account both cutting deformation and tool strength: for rough machining, a larger rake angle of 10°-15° is chosen to reduce chip deformation and lower cutting force; for finishing, the rake angle is further increased to 15°-20° to suppress sticking and improve surface quality. The clearance angle is generally set at 6°-10°. A too small clearance angle will intensify the friction between the tool and the workpiece, while a too large one will reduce the strength of the tool tip. The tool tip radius arc affects surface quality and life: for finishing, a small radius of 0.2-0.4mm is selected to reduce residual height and reduce roughness; for rough machining, a large radius of 0.8-1.2mm is selected to increase tool tip strength and adapt to heavy cutting. In terms of the main included angle, when machining thin-walled stainless steel parts, a large main included angle of 75°-90° is selected to reduce radial cutting force, avoid workpiece deformation, and improve the chip flow direction, reducing the impact on the tool.
The selection of tools also needs to be combined with the cutting process: during rough machining of stainless steel, low rotational speed (500-800r/min) and large feed rate (0.2-0.3mm/r) are used, combined with extreme pressure cutting fluid for cooling, to reduce the accumulation of cutting heat; during finishing, the rotational speed is increased to 1500-3000r/min, with a small feed rate (0.05-0.1mm/r), to ensure processing accuracy. During the machining process, chip breaking should be timely to avoid long chips entangling the tool, which can be optimized by adjusting the main included angle and edge inclination angle to further improve the chip-breaking effect and extend tool life.
TS-30 dual spindle CNC latheopposed https://www.hexincnclathe.com/ts-30-dual-spindle-docking-cnc-lathe.html
Smart laundry pod production can now be said to have entered a new normal development situation. In the future market, it is widely watched and enthusiastically participated in. The currently developed automated assembly machine is a highly concerned additive manufacturing technology and equipment in the manufacturing industry. Smart laundry pod production is the hallmark product of smart laundry pod production, becoming a new highlight. With the wide use of smart laundry pod production, various factories have different requirements for automated products, which determines the large-scale application of non-standard smart laundry pod production. In the future, the development of non-standard smart laundry pod production will definitely become more extensive. Our company is committed to the development of various automated assembly machines, with scientific and rigorous design, effectively ensuring the operation effect of smart laundry pod production, and greatly improving work efficiency, earning unanimous praise from our customers.
Now let's explain the advantages of the automatic assembly machine:
1. High precision production.
The smart laundry pod production we developed is meticulous in product design. The smart laundry pod production operates accurately and has extremely high production precision, effectively improving product quality.
2. Fast production speed.
The smart laundry pod production uses high-efficiency motors, which, while maintaining production accuracy, greatly increases production efficiency. It far exceeds manual production.
3. Stable operation and reliable quality.
We usually choose low-cost but high-standard components for our customers. The failure rate of smart laundry pod production is extremely low. At the same time, for each product, we have professional automation engineers for tracking services, ensuring the quality of the product.
4. Simple operation.
Our smart laundry pod production in design takes into account the cultural foundation of workers, focusing on improving the automation level of production. Many devices can be operated with one click and automatically produce. It allows unskilled workers to operate, significantly reducing labor costs and management costs, effectively ensuring versatility.
5. Infrared sensing, precise control.
In many cases, smart laundry pod production requires the use of cutting, slicing tools, and power-on testing, which require stable mechanical arm operation to avoid injury. If we design dangerous actions, then we need infrared sensing and humanized program design. This ensures the stability of the machine.
smart laundry pod production https://www.rexglobalmfg.com/innovative-laundry-detergent-pod-production-equipment-launches-with-smart-manufacturing-upgrades.html
