High speed machining tool selection (5)

2, drill bit

The drill bit is the most widely used tool in hole machining tools. Especially when drilling holes below Ñ„30mm, the drill bit is structurally divided into integral and indexable insert drill bits. Due to the pursuit of high production efficiency in the automotive industry, more and more The application of shoulder and chamfer composite drills is also becoming more widespread.

Many workpieces require drilling a hole or holes, and today most of these holes are machined on CNC machines and machining centers. In principle, there are many different types of holes, and the most common difference between these holes is the fit clearance. These holes include threaded holes, holes that are well matched to the requirements, pipe holes, and holes that are machined to remove weight. These holes are through holes or blind holes and have different requirements for cutting tools and methods.

In the drilling process, in order to achieve a satisfactory effect in an effective manner, four main factors need to be considered.

1 ratio of diameter to hole depth 2 required precision and surface roughness of machined hole 3 workpiece material type, quality and hardness 4 machine tools, especially machining conditions and spindle speed

These factors will influence the choice and application of the drill bit type. The stability of workpieces, machine tools and process systems is paramount in all processes. The drilling process plays a role in determining what type of drill is suitable for the machining process. The smallest indexable insert has a diameter of 12.7 mm.

3, sickle

The boring tool is divided into an integral type, a clamping type and an adjustable type according to the structure, and the adjustable type is further divided into a fine adjustment type and a differential type. Commonly used in the processing of automotive transmission housings are single-edged fine-tuning boring tools and double-edged rough boring tools.

The rough boring tool uses an axial adjustment mechanism to make the heights of the two blades completely uniform, achieving an ideal balance and preventing vibration. The feed screw is the lifeblood of the fine boring head. In some manufacturers, the paired production method is adopted to minimize the backlash between the screw and the nut to obtain the highest reliability. In the hole on the back side, it is often necessary to reverse the workpiece or turn the table. This is not only a waste of time, but also it is difficult to ensure the coaxiality. The EWN fine boring head produced by BIG in Japan only needs to reverse the blade. Perform ruthenium processing to ensure accuracy and improve production efficiency. For the hole with high precision requirements, the arbor has high dynamic balance effect. In the high-speed small hole fine boring head moving balance ring produced by BIG, the built-in balance block will move, and the balance ring will be rotated according to the relevant data in the manual. To the corresponding position, the hoe can be balanced.

4, tapping

There are two kinds of tapping methods on the machining center, high-precision automatic reverse thread tapping machine, the maximum speed is 6000r/min, and the rigid tapping without any compensation is needed. These two kinds of tapping methods have their own advantages and disadvantages, so they are selected according to the processing requirements. In the mass production, due to the pursuit of high efficiency, the automatic reverse thread tapping device will be beneficial to production, but its mechanism is complex, the accessories are numerous, and the maintenance is not easy. expensive. At present, with the increase in the number of CNC machining centers, rigid tapping will become increasingly popular.

When rigid tapping is used, since the CNC system of the machining center controls the axial feed, the tap itself does not need to bear the control task. When the tapping is rigid, the rotation speed of the tap is 100% synchronous with the axial feed of the mechanical spindle, and the tap can be Clamped in the fixed holder without any floating function.

The shank used for tapping is generally elastically clamped.

5, compound tool

In order to maintain high efficiency, we must maximize the “cutting” time so that the relevant time that is not spent in the actual cutting mode is minimized. In terms of tools, how to make the cutting time the shortest, that is, the composite tool, the working process of a tool is the tool change—the rapid movement of the tool or the table—the cutting speed moves—the fast return to the tool change point, if the two tools are combined This saves tool change time, fast travel time and a safe distance of 3-5 mm before cutting. The main composite knives feature a drilling chamfering compound tool, a rough and chamfering compound boring tool. However, whether the tool is compounded or not must be calculated or tested to the shortest processing time.

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Lap Joint Stub End

STUB END Type welded/seamless LONG TYPE /SHORT TYPE

Standard: ASME/ANSI B16.9 ANSI/ASME B16.11 ANSI/ASME B16.28

BSEN10253-2 BS EN10253-4

Size:1/2''~48''(Seamless); 16''~80''(Welded)

Wall thickness: Sch5~Sch160\XXS

Manufacturing process: Hot Extruded , cold extruded ,pressed , etc.

Material:

Carbon steel:

FSGP PG370W PT370
.ASTM / ASME A234: WPB - WPC - WP1WP11 - WP12 - WP5 - WP22 - - WP91
ASTM / ASME A/SA 420: WPL6 - WPL3EN 10216-2: P195GH - P235GH - P265GH-P355Nh
20MnNb6 - 16Mo3 - 8MoB5-4 - 14MoV6310CrMo5-5 - 13CrMo4-5 - 10CrMo9-10-15NiCuMoNb5-6-4 - X11CrMo5X11CrMo9-1 - X10CrMoVNb9-1X10CrWMoVNb9-2 - X20CrMoV11-1former BS-DIN-AFNOR equivalent grades)

HIGH YIELD STEEL FOR PIPELINE AND OFFSHORE FITTINGS
ASTM A860 / MSS-SP75: WPHY 42WPHY 46 - WPHY 52 - WPHY 60-WPHY 65 - WPHY 70 grades
WPHY 80 only as per MSS-SP75 EN 10208-2: L245NB - L290NBL360NB - L415NB - L360QBL415QB - L450QB - L485QB - L555Q

Stainless steel:

304/SUS304/UNS S30400/1.4301

304L/UNS S30403/1.4306;

304H/UNS S30409/1.4948;

309S/UNS S30908/1.4833

309H/UNS S30909;

310S/UNS S31008/1.4845;

310H/UNS S31009;

316/UNS S31600/1.4401;

316Ti/UNS S31635/1.4571;

316H/UNS S31609/1.4436;

316L/UNS S31603/1.4404;

316LN/UNS S31653;

317/UNS S31700;

317L/UNS S31703/1.4438;

321/UNS S32100/1.4541;

321H/UNS S32109;

347/UNS S34700/1.4550;

347H/UNS S34709/1.4912;

348/UNS S34800;

Alloy steel:

ASTM A234 WP5/WP9/WP11/WP12/WP22/WP91;

ASTM A860 WPHY42/WPHY52/WPHY60/WPHY65;

ASTM A420 WPL3/WPL6/WPL9;

Duplex steel

ASTM A182 F51/S31803/1.4462;

ASTM A182 F53/S2507/S32750/1.4401;

ASTM A182 F55/S32760/1.4501/Zeron 100;

2205/F60/S32205;

ASTM A182 F44/S31254/254SMO/1.4547;

17-4PH/S17400/1.4542/SUS630/AISI630;

F904L/NO8904/1.4539;

725LN/310MoLN/S31050/1.4466

253MA/S30815/1.4835;

Nickel alloy steel:

Alloy 200/Nickel 200/NO2200/2.4066/ASTM B366 WPN;

Alloy 201/Nickel 201/NO2201/2.4068/ASTM B366 WPNL;

Alloy 400/Monel 400/NO4400/NS111/2.4360/ASTM B366 WPNC;

Alloy K-500/Monel K-500/NO5500/2.475;

Alloy 600/Inconel 600/NO6600/NS333/2.4816;

Alloy 601/Inconel 601/NO6001/2.4851;

Alloy 625/Inconel 625/NO6625/NS336/2.4856;

Alloy 718/Inconel 718/NO7718/GH169/GH4169/2.4668;

Alloy 800/Incoloy 800/NO8800/1.4876;

Alloy 800H/Incoloy 800H/NO8810/1.4958;

Alloy 800HT/Incoloy 800HT/NO8811/1.4959;

Alloy 825/Incoloy 825/NO8825/2.4858/NS142;

Alloy 925/Incoloy 925/NO9925;

Hastelloy C/Alloy C/NO6003/2.4869/NS333;

Alloy C-276/Hastelloy C-276/N10276/2.4819;

Alloy C-4/Hastelloy C-4/NO6455/NS335/2.4610;

Alloy C-22/Hastelloy C-22/NO6022/2.4602;

Alloy C-2000/Hastelloy C-2000/NO6200/2.4675;

Alloy B/Hastelloy B/NS321/N10001;

Alloy B-2/Hastelloy B-2/N10665/NS322/2.4617;

Alloy B-3/Hastelloy B-3/N10675/2.4600;

Alloy X/Hastelloy X/NO6002/2.4665;

Alloy G-30/Hastelloy G-30/NO6030/2.4603;

Alloy X-750/Inconel X-750/NO7750/GH145/2.4669;

Alloy 20/Carpenter 20Cb3/NO8020/NS312/2.4660;

Alloy 31/NO8031/1.4562;

Alloy 901/NO9901/1.4898;

Incoloy 25-6Mo/NO8926/1.4529/Incoloy 926/Alloy 926;

Inconel 783/UNS R30783;

NAS 254NM/NO8367;

Monel 30C

Nimonic 80A/Nickel Alloy 80a/UNS N07080/NA20/2.4631/2.4952

Nimonic 263/NO7263

Nimonic 90/UNS NO7090;

Incoloy 907/GH907;

Nitronic 60/Alloy 218/UNS S21800


These fittings are used in lines that might require a quick-disconnect system. They are also used to
facilitate lining up the bolt holes of flanges when there flanges are now welded or fastened to the pipe.
Normally, stub ends are installed in pairs, the paired fittings mating with two lap joint flanges. This allows wasy opening of the line for future cleaning and inspection and if the line requires replacement, the flanges can be reused because they are not fastened to the system. They ride freely in the outside of the pipe. Lap joint stub ends are made with serrated Gasket surfaces for improved sealing of the connection and prevention of leakage at the joint. This surface has replaced the raised gasket surface of a flange.



Lap Joint Stub End,Stainless Steel Stub Ends,Long Hub Stainless Stub End,Astmb 16.9 Stub End

HeBei GuangHao Pipe Fittings Co .,LTD (Cangzhou Sailing Steel Pipe Co., Ltd) , https://www.guanghaofitting.com