needle point grinding machine honing machine

machines

Lapmaster Wolters offers a unique and comprehensive scope of high-precision processing machines.We offerLapping Machines,Polishing Machines,Spherical Lapping Machines,Fine Grinding Machine,Brush Deburring Machine,Creep Feed Grinding,Bore Honing Machine, Double Disc Grinding Machine,Buffing Machines,Metallographic Sample Preparation Equipmentin our ever growing product line.

PRECISION SURFACING SOLUTIONS supports manufacturers in a wide variety of industries in which precision grinding, lapping, polishing, deburring and advanced materials processing equipment is commonly used. They all need high-quality, high-precision, stable and well-engineered machines to manufacture high-quality work pieces.

Founded in Chicago in 1948 as a manufacture of lapping and polishing machines for the mechanical seal market, Lapmaster has grown to a worldwide solution provider for more than 20 industries like precision optics and advanced materials.

Since 1907 Barnes has been considered a world leader in developing innovative honing and bore finishing technology and processes. The earliest Barnes honing machines were the first to make honing a practical and efficient means of finishing automotive cylinder bores in a production environment.

Since May 2020, the brand ISOG belongs to the globally active Precision Surfacing Solutions Group. With the addition of ISOG to the already existing strong brands within the Group, PSS further strengthens its position as a leading supplier of high quality, best in class technologies in the market of surface quality enhancement solutions.

ELB-Schliff Werkzeugmaschinen GmbH has been producing surface and profile grinding machines for over 60 years. The company was founded by Edmund Lang in the city of Babenhausen which led to the name "ELB-Schliff".

The aba company was founded in 1898 under the name "Messwerkzeugfabrik Alig & Baumgrtel Aschaffenburg", hence the initials aba. Today, the aba Grinding Technologies is exclusively focused on the advancement and production of precision surface and profile grinding machines.

Founded in 1934, KEHREN is a well-established designer and builder of high-precision grinding machine tools and systems under the following categories: vertical grinding centers, vertical grinding centers with portal design, surface grinders with rotary tables and horizontal spindles, and surface grinders with dual rotary tables and vertical spindles.

Produced in Germany since 2009, MICRON machines are compact and dynamically rigid grinding machines especially designed for Creep Feed and Profile grinding. MICRON is an industry leader in grinding of Hydraulic components like stators, rotors and van pumps.

Founded in Germany in 1804 by Mr. Peter Wolters, Peter Wolters has been producing lapping, polishing and fine grinding equipment since 1936. In 2019 Precision Surfacing Solutions acquired the division Wafer plant and service business for photovoltaic and special materials of Meyer Burger. Further Information can be found at www.precision-surface.ch

Founded in Chicago in 1948 as a manufacture of lapping and polishing machines for the mechanical seal market, Lapmaster has grown to a worldwide solution provider for more than 20 industries like precision optics and advanced materials.

needle manufacturing | usa needle inc

Use ourexperience in needle manufacturing and process equipment design,development and building of needle manufacturing equipment and themanufacturing of conical, lancet and multi-faceted needles with highquality and volumes to help you reach your goals. We have many yearsof experience inproduct engineering and development of prototypesfor the medical / surgical industry.

hv-1000 vertical honing machine

The Barnes HV series of Vertical Honing Machines are designed dually for general purpose and specialized applications. They combine the latest technology with a modular design which results in a system that delivers consistent and dependable results. Barnes Series HV Vertical-Spindle Features: -Full-line of equipment for 0.125" - 30" diameter parts processing -Stroke lengths from 12" up to 76" in single or multi-spindle configurations -Robust design and heavy-duty base/column construction for accuracy & repeatability -Intuitive, menu-driven, programmable system controller, w/color touch-screen PC-based HMI -Lateral, X-Y and Rotary Index Tables available for parts processing flexibility -Open" design allows for easy operator access,maintenance & automation interface -Compact Traveling Head" spindle-drive/hone expansion (electromechanical linear actuator) -Post-Process Parts Gauging options include both Servo-column mounted and Bench-mounted air gauging systems

PRECISION SURFACING SOLUTIONS supports manufacturers in a wide variety of industries in which precision grinding, lapping, polishing, deburring and advanced materials processing equipment is commonly used. They all need high-quality, high-precision, stable and well-engineered machines to manufacture high-quality work pieces.

Founded in Chicago in 1948 as a manufacture of lapping and polishing machines for the mechanical seal market, Lapmaster has grown to a worldwide solution provider for more than 20 industries like precision optics and advanced materials.

Since 1907 Barnes has been considered a world leader in developing innovative honing and bore finishing technology and processes. The earliest Barnes honing machines were the first to make honing a practical and efficient means of finishing automotive cylinder bores in a production environment.

Since May 2020, the brand ISOG belongs to the globally active Precision Surfacing Solutions Group. With the addition of ISOG to the already existing strong brands within the Group, PSS further strengthens its position as a leading supplier of high quality, best in class technologies in the market of surface quality enhancement solutions.

ELB-Schliff Werkzeugmaschinen GmbH has been producing surface and profile grinding machines for over 60 years. The company was founded by Edmund Lang in the city of Babenhausen which led to the name "ELB-Schliff".

The aba company was founded in 1898 under the name "Messwerkzeugfabrik Alig & Baumgrtel Aschaffenburg", hence the initials aba. Today, the aba Grinding Technologies is exclusively focused on the advancement and production of precision surface and profile grinding machines.

Founded in 1934, KEHREN is a well-established designer and builder of high-precision grinding machine tools and systems under the following categories: vertical grinding centers, vertical grinding centers with portal design, surface grinders with rotary tables and horizontal spindles, and surface grinders with dual rotary tables and vertical spindles.

Produced in Germany since 2009, MICRON machines are compact and dynamically rigid grinding machines especially designed for Creep Feed and Profile grinding. MICRON is an industry leader in grinding of Hydraulic components like stators, rotors and van pumps.

Founded in Germany in 1804 by Mr. Peter Wolters, Peter Wolters has been producing lapping, polishing and fine grinding equipment since 1936. In 2019 Precision Surfacing Solutions acquired the division Wafer plant and service business for photovoltaic and special materials of Meyer Burger. Further Information can be found at www.precision-surface.ch

Since 1907 Barnes has been considered a world leader in developing innovative honing and bore finishing technology and processes. The earliest Barnes honing machines were the first to make honing a practical and efficient means of finishing automotive cylinder bores in a production environment.

electrochemical grinding makes a point | production machining

A programmable pointing and material handling system used on electrochemical grinding machines can accommodate a range of needle point designs while eliminating a variety of pre- and post-process operations. #techbrief

According to electrochemical grinding (ECG) solutions provider Tridex Technology, a part of Glebar Company, grinding sharp points onto needles used in surgical procedures can be challenging using conventional methods. Oftentimes, the needles must be masked for handling, requiring additional steps in the production process. Many manufacturers also still use converted outer diameter (OD) grinders with custom tooling and soft grinding wheels, which can wear at a high rate. Setting up and changing over these machines can be time consuming and require extensive mechanical adjustments. In addition, once in production, these grinders leave a large inner diameter (ID) burr, requiring the needles to be sent through a secondary process such as grit blasting or electropolishing. Plus, complex needle points, such as Menghini points, require a separate primary bevel cut and secondary sharpening, which can lead to longer cycle times.

Tridex says some custom machine builders have developed needle grinders using robots to replace or simplify the fixturing. However, a robotically controlled fixture requires a series of collets to clamp and rotate the needles in unison. Collet systems take up a lot of space and this limits the number of parts that can be sharpened to a set amount (usually no more than 20 at a time). The company says another limitation of a robotic fixture is that the needles must be held far from the grinding wheel, which can lead to deflection and grinding inaccuracy.

Electrochemical grinding using a programmable pointing and material handling system can accommodate a range of needle point designs while eliminating a variety of pre- and post-process operation (Photo credits: Glebar Co.)

As an alternative, Tridex has developed its PGS-100 burr-free ECG point grinding system, which can be installed on its SG-1645 and SG-2060 ECG machines. The goal was to develop an accurate grinding process that would eliminate masking, pre- and post-processing, and deflection while enabling quick setups and changeovers as well ashandling a variety of needle point designs. ECG flows electrical current from a negatively charged abrasive wheel to a positively charged conductive workpiece through an electrolyte. The metal is removed with very little heat, both by mechanical abrasive action and electrochemical dissolution.

Made from stainless steel, the PGS-100 is a fully programmable ECG pointing and material handling system for tube or solid wire. Its servo-controlled design is said to offer precision needle rotation and repeatability, and itssimplicity in loading and unloading enables trained operators to run multiple machines at once. It can produce any number of facets on needles measuring in diameter from 0.013" to 0.2", including tri-bevel, back-bevel, diamond-point, trocar, stylet, Franseen, Menghini and custom points. It is also capable of handling 4" (100 mm) width of workpieces holding between 32 to 120 needles, depending on their diameter, which enables manufacturers to maximize their output per cycle. By clamping the needles closer to the point, the PGS-100 is said to achieve higher point grinding accuracy and minimal deflection. Secondary operations, such as burr-free, cross-slot grinding and notch cuts for biopsy needles, are also possible.

open forum: needle point grinding - connecticut hypodermics inc

In 1946, a set of government standards was established to produce acceptable criteria for hypodermic needles. These standards, called "GG-N-196" are still in use today. Precepts of correct bevel length for various gauge sizes are divided into three classifications: A,B, and C bevel lengths. An "A" bevel is the longest and sharpest and is often used in applications such as blood collecting. To obtain the long, sharp point, a compromise is made--the tip is very delicate, and can be easily deflected and damaged. A "C" bevel does not have a point as sharp as the "A" bevel, but it is more sturdy and less delicate. A common example of the application for "C" bevel type is in piercing a rubber stopper. The length of a "B" bevel falls between "A" and "C". There are more applications for the "B" type bevel, as it is relatively sturdy and sharp.

A standard needle point or bevel as applied to "GG-N-196" has three grinds: a primary grind and two secondary grinds. The primary grind angle is the largest factor in determining the finished bevel length. To determine the primary angle, the formula is as follows:

Since the inception of "GG-N-196", an explosion of needle point applications has occurred. Many needle point styles have been developed that are not addressed in the "GG-N-196" specifications. Examples of these needle types are: Trephine, Cournand, Veress, Huber, Seldinger, Chiba, Trocar, and Francine. The expansion of applications and improvements to product function has led to diversity in the development of new point styles. For example, a Huber point may be selected in an application where an anticoring needle point is required. The anticoring point cleanly pierces through a septum without coring, with a reduced risk of blocking the needle, which coring can cause. As the applications for specialty needles expand, variations and modifications will continue to be made to improve product performance. Today, a manufacturer can assist the design engineer with design input and in the development of product specifications. Careful consideration should be made in choosing the appropriate type of hypodermic tubing and needle design. For example, "Bright-Draw" tubing might be selected for an application where red blood cell damage during flow through the needle is of concern. Type 316 SS or inconel may be selected over the standard 304 SS if the application involves a corrosive environment. The inside diameter surface finish is not a critical factor in determining needle sharpness, but the hardness of the tubing is important. Soft tubing will not grind as easily as needle temper tubing; it has a tendency to smear and load the wheel. The ground edges of soft tubing will be rougher, affecting needle sharpness. Needle sharpness is often an important factor. This is usually measured as the force required to penetrate a thin membrane. Statistical tools can be used to calculate the sharpness of a production run. Among the variables that contribute to needle sharpness are: Grind geometry, grinding wheel choice, grinding coolant, material removal rate and tubing choice. In addition, lubricating coatings and other post grinding operations can improve sharpness values. Process capability studies and PFMEA (Process Failure Mode Effects Analysis) can aid in dealing with potential problems on new manufacturing projects. It is important to try to isolate and analyze each variable as it affects the use and performance of a hypodermic needle.

honing technology and its applications in automotive manufacturing

Honing technology is a special form of grinding, and also an efficient method of finish processing. This process can improve the dimensional accuracy, geometric accuracy and surface roughness of parts. It is widely used in the manufacture of automobile parts.

Honing is to use one or more honing stick (stones) installed on the honing head around, stick (stones) along the radial direction open by expanding mechanism(rotation and pull type), put the pressure to the workpiece hole wall, resulting in certain surface contact. Honing head rotates and reciprocates without moving parts, or the honing head only rotates and the workpiece moves back and forth, finishing the honing process.

In most cases, the structure between the honing head and the honing machine spindle is floating, and structure between the honing head and the workpiece fixture is also floating. In this way, the honing head is guided by the whole wall of the workpiece. Therefore, the accuracy of the machine has little influence on the processing accuracy and forms a unique processing surface.

The reciprocating motion makes the processing surface form a cross and spiral cutting track. Since the turning number of honing head in each reciprocating motion is not round number, the track of each abrasive grain on the hole wall is not repeat during the two motions. In addition, when the honing head rotates, there is an overlap in the axes between the honing stones and previous track, making the connection between the front and backtracks smoother and more uniform. Then, every point of hole wall and thehoning surface has almost thesame opportunities to interfere with each other during the whole honing process. Therefore, with the honing process going, interference points are constantly generated, and they are continuously polished off, then new interference points are generated again, the honing process will constantly recycle. With the increase of contact area between holes and the surface of honing stones, the degree of interference and cutting effect are weakened, improve the roundness and cylindricity of hole and surface of honing stones. Finally, finish the process of hole surface. In order to get cylindricity better, change the position of the honing head and the axial workpiece under the conditions permit.

It should be noted that if diamond or CBN honing stick (stone) is used, owing to small wear of superhard abrasive in the process, that is honing stick (stone) is dressed small by workpiece, therefore, the accuracy of the hole depends on the original accuracy of honing stone on the honing head to a certain extent. Before using the diamond and CBN honing stone, the honing stone should be well dressed.

The first stage is shedding cutting. At the beginning of honing, the hole wall is rough, the contact area od honing stone and the hole wall is small, and the contact pressure is large, and the protruding part of the hole wall is quickly worn off. Owing to thelarge contact pressure of the honing stone surface and the wear of chips for the bond, the bonding strength between abrasive grains and the bond decreases. Therefore, some abrasive grains will fall offand expose new ones.

The second stage is crushing cutting. With the honing process going, the surface of hole wall is more and more smooth, and the contact area with honing stone is larger, and contact pressure per unit area decreasesand the cutting efficiency is also decreased. At the same time, the chips cut off are small and fine, and the wear of these chips for the bond is also small. Therefore, the abrasive grains of honing stone fall off very little, and grinding dose depend on new abrasive grains, is the tips of abrasive grains for cutting. So, the abrasive grain tips load is very large, and the abrasive grains are easy to break offand form new cutting edges.

The third stage is blocking cutting. When honing continues, the contact area between the honing stone and hole surface is larger and larger. Fine chips between the honing stone and hole wall are not easy to discharge, making the honing stone block and smooth. At this time, the cutting ability of honestone is very lowand is for polishing. If honing continues, the honing stone is blocked serious and cohesive blockage occurs, and the honing stones will lose cutting ability and heat seriously, and it will affect the hole accuracy and surface roughness. So, honing should be finished as soon as possible.

The feed mechanism expands the feed at a constant speed to force the abrasive grains into the workpiece when quantitative feed honing. Therefore, there are only shedding cutting and crushing cutting in the honing process, not blocking cutting occurs. When the cutting force decreases, the feed is larger than the actual grinding amount, and then the honing pressure increases, so that the abrasive grains fall off, break off, and the cutting effect is enhanced. Non-feed honing can be used finally in order to improve the hole accuracy and surface roughness.

Starting with constant pressure feed honing, when the honing stone enters the blocking cutting stage, convert to quantitative feed honing to improve the efficiency. Non-feed honing can be used finally in order to improve the hole accuracy and surface roughness.

There are some small and medium-sized through holes, their cylindricity is within 0.001 mm. The roundness of some parts with uneven wall thickness is 0.002 mm, such as connecting rods. The roundness can also reach 0.005 mm for large holes (aperture is over 200mm). It is possible that the straightness can reach within 0.01 mm/1 Mif there are not ring grooves or radial holes.

The accuracy of honing is higher than that of grinding. Because the bearing supporting the grinding wheel is located outside the honed hole when grinding, it results in deviation. The grinding accuracy is worse for small hole processing. Generally, honing can only improve the shape accuracy of the workpiece. If want to improve the position accuracy of the workpiece, take some necessary measures.

It is good for storage of lubricating oil and the maintenance of oil film for cross mesh surface. There is a higher surface support ratethe ratio of actual contact area and amatching area between the hole and the shaft, and it can bear thelarger load and has good wear resistance, improving the product service life. Honing speed is low( dozens of the grinding speed), and the surface of honing stone is in contact with the hole, so the average grinding pressure of each abrasive grain is small, and the heat of the workpiece is very small. There is no thermal damage and metamorphic for theworkpiece and the deformation is small. There arealmost no sanding and extrusion hard layer on the honing surface.

Mainly process various cylindrical holes: through holes, discontinuity hole on axial and radial, such as radial holes or slotted holes, keyway holes, spline holes, blind holes, multi-step holes, etc. In addition, aspecial honing head can also process conical holes, elliptical holes, and etc. Cylindrical honing tools can hone the cylinder, but the removal margin is far less than that of inner cylindrical honing. Honing can process almost any material, especially the diamond and CBN abrasives used, which further expands the applications of honing and greatly improves the honing efficiency.

Honing is one of the least removal margin processing method in order to achieve the required accuracy of drawings. In thehoning process, honing tools takes the workpiece as the guide to cut the surplus allowance of the workpiece and achieve the required accuracy of the workpiece. When honing, honing tools first hone the parts of theworkpiece with much allowance, then gradually hone the parts of theworkpiece with less allowance.

Due to the shortcomings of process methods in technology, some processing defects will appear in the process, such as out-of-round, mouth of a born, turbo hole, small size, drum shape, taper, boring tool grain, reamer grain, rainbow shape, hole deviation, surface roughness, etc. Honing can greatly improve the dimensional accuracy, roundness, straightness, cylindricity and surface roughness of holes by removing the least machining allowance.

SUNNEN KGM-5000 series honing machine is a high-precision honing machine developed for plungers in the oil pump nozzle industry. Its removal rate is 0.01mm, total processing period is 30s, roundness is 0.0005mm, straightness is 0.0007mm, thesurface roughness is Ra0.06. It has achieved the goal of honing completely replace of grinding, thus greatly improving the performance and prolonging the life of oil pump nozzle.

According to the material of the medium shell and the special structure of the inner hole of the supercharger, theelectroplated diamond abrasive sleeve can be used as honing tools with the muti-vertical axis structure, complete a series of process, such as rough process, semi-finish process, finish theprocess and deburring in a cycle. TheMulti-station turntable can realize the automation of process and improve work efficiency.

pgs-100 | burr free electrochemical point grinding system

The PGS-100 is a fully programmable pointing and material handling system to manufacture a wide variety of medical device points on tubing or solid wire using electrochemical grinding technology (ECG). When added to the Tridex Model SG-1645 or SG-2060 electrochemical grinders, it offers very fast set-up times and can be changed over from one size to another in only minutes. It also facilitates secondary operations such as electro-polishing, bead blasting, slotting, etc. without losing point orientation. Unlike traditional point grinders, it requires no adhesive tape and has the capacity to handle a 100mm (4.0 inches) width of workpieces so it has high throughput for specialty pointing applications. Visit the Tridex Technology YouTube Channel for video demonstrations.

When added to the Tridex Model SG-1645 or SG 2060 electrochemical grinders, the PGS-100 is a fully programmable pointing and material handling system to manufacture a wide variety of medical device points on tubing or solid wire using electrochemical grinding technology (ECG).

Glebar prides itself on selling precision grinding machine system solutions, tailored to your specific needs. Below is a small subset of applications, performed on this machine, that Glebar has provided solutions for over the years.

Low production output, as only one wire can be ground at a time. Changeover between wire diameters is time-consuming, delaying production. Grinding can leave burrs requiring secondary processes to deburr, lengthening production time.

Converted OD grinders with custom tooling and soft grinding wheels all of which wear at a high rate. Setup and changeover time is significant and requires extensive mechanical adjustments. Parts, in most cases, must be taped for handling requiring additional steps in the production process. Primary cut leaves a large ID burr which must be removed in a secondary process step such as grit blasting or electro-polishing. Complex needle points, i.e. Menghini points, require separate primary bevel cut and secondary sharpening, leading to long cycle times.

If you have relevant drawings or illustration files, please upload them here. Files should be in .jpg, .pdf, or .tiff format and should be 10MB or less in size. If you need assistance regarding upload, please call us (201) 337-1500

electrochemical point grinding system nails a needle point application

Tridex Technologys PGS-100 provides an accurate process that eliminates taping, pre- and post-processing and deflection, while allowing for quick set-up and changeovers. The burr-free solution is also CE and ISO 13849 certified.

Tridex Technology (Philadelphia, PA), a Glebar company, recently delivered a process to a customer for needle point grinding using electrochemical grinding (ECG) and the Point Grinding System Model PGS-100.

Grinding sharp points onto needles can be a difficult process. In most cases the parts must be taped for handling requiring additional steps in the production process. Many manufacturers still use converted OD grinders with soft grinding wheels and custom tooling. These grinding wheels wear at a high rate. Setting up and changing over these grinders takes a significant amount of time and requires extensive mechanical adjustments delaying production.

Once in production, these grinders leave a large ID burr requiring the needles to be sent through a secondary process such as grit blasting or electro-polishing. Complex needle points such as Menghini points, require a separate primary bevel cut and secondary sharpening leading to longer cycle times.

Some custom machine builders have developed needle grinders using robots to replace or simplify the fixturing. While this approach looks innovative, there are significant limitations in productivity and flexibility. A robotically controlled fixture requires a series of collets to clamp and rotate the parts in unison. Collet systems take up a lot of space and this limits the number of parts that can be sharpened to a fixed amount usually no more than 20 at a time. On a standard pointing fixture, the quantity per grind increases as the diameter gets smaller. Another limitation of a robotic fixture is that the needles must be held far from the grinding wheel allowing for deflection and inaccuracy. While robots have gotten better and more accurate, they will never approach the precision of properly designed moving platen pointing fixtures.

Tridex was challenged to deliver a highly accurate process that would eliminate taping, pre- and post-processing, deflection, allow for quick set-up and changeovers, and can handle all variety of points used in the industry.

Tridex developed and produced their Burr Free Electrochemical Point Grinding System Model PGS-100, which works as an adjunct to the Tridex SG-1645 and SG-2060 electrochemical grinders. Both grinders are CE and ISO 13849 certified, ensuring safety for the operator and environment. The combination offers fast set-up and changeover times.

Using the ECG process, the PGS-100 is a fully programmable pointing and material handling system for medical device points on a tube or solid wire. It features a servo-controlled design for high precision rotation and repeatability. Simple tooling for loading and unloading allows any trained operator to run multiple machines at once. It is made from stainless steel making the point grinding system very robust and durable.

The PGS-100 allows manufacturers to become more productive in their needle point grinding, says Tom Travia, vice president of Business Development at Glebar Company. With the PGS- 100, there is no need for grit blasting or taping, eliminating an entire step from the production process. Part set up is programmable requiring no mechanical adjustments making changeovers between diameters and tip geometry easier and faster.

The PGS-100 can produce any number of facets on needles measuring from 0.013 to 0.200 diameter including Tri-bevel, back bevel, trocar, diamond point, stylet, Franseen, custom points and Menghini (sharpened bevel) points. It is also capable of handling 4 (100mm) width of workpieces holding between 32 to 120 needles depending on the diameter allowing manufacturers to maximize their output per cycle. By clamping the needles closer to the point, the PGS-100 allows for better accuracy and minimal deflection. The Tridex grinder is also capable of secondary operations such as burr free cross slot grinding and notch cuts for biopsy needles.

Together with Sunrise, Trilogy Machinery Inc. (Belcamp, MD), the exclusive U.S. distributor for Sunrise ironworkers, has increased the standard warranty for Sunrises ironworkers and punching machines to three years for parts and one year for labor.

Welding automation company Pemamek Oy (Loimaa, Finland) and its North American subsidiary, Pemamek LLC (Liberty Township, OH), have named Kevin R. Antoniak to the position of Midwest regional sales manager.