discount 70% in 2018-10-16 to 2018-10-18
price: USD$ 10.50
freight :USD$7.00,(Postal parcel)
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Product name：Straight shank hand reamer
Specifications range: 3H7-25H7
Essential information：Straight shank hand reamerRotation of thin metal with one or more cutter teeth to remove the surface of machined holetool。A rotary finishing tool with a straight or spiral blade. Used for reaming or trimming.
Uses:The reamer has one or more cutter teeth, which is used to remove the rotary cutter on the machined surface of the thin metal layer.After the cutter processing after the hole can obtain the exact size and shape.
Reamer forReamingThe holes that have been drilled (or expanded) on the workpiece are mainly designed to raise the holeMachining accuracyTo reduce the surface roughness, it is a tool for finishing and semi finishing of holes, and the machining allowance is very small.
The diameter tolerances of the reamer directly affect the dimensional accuracy of the machined holes, the manufacturing cost and the service life of the reamer. When reaming, the diameter of the hole is larger than the reamer diameter due to the radial runout of the cutter tooth and the amount of reaming and cutting fluid, and the reaming is called reaming. But because of the blunt radius of the blade, the hole wall will be reduced and reduced, which is called reaming". The factors of "expansion" and "contraction" exist simultaneously, and the final result should be determined by experiment. The experience shows that reaming with high speed steel reamer generally occurs, reaming with carbide reamer usually shrinks, and shrinkage often occurs when reaming thin-walled holes.
The nominal diameter of reamer equals to the nominal diameter of the hole. The deviation between the top and bottom of the reamer should be taken into account the expansion tensor and the shrinkage, and the necessary wear tolerances should be set out. If the reaming occurs, the maximum and minimum dimensions of the reamer are designed and manufactured as follows: National Standard: reamer manufacturing tolerance G = 0.35 (). According to the general experience data, high speed steel reamer Pmax = 0.15 (); carbide reamer reaming after shrinkage is often due to different workpiece material, so often take Pamin = 0, or take Pamin = 0.1 (). The reliable method of determining Pmax and Pamin is determined by experiments.
When the reamer diameter is large, more teeth are desirable; when the toughness material is used, the number of teeth should be less; and when the brittle material is processed, the teeth number is more desirable. In order to measure reamer diameter, the number of teeth should be even. In the commonly used diameter do=8~40mm range, the number of teeth generally = 4~8. The reamer teeth along the circumference can be equal tooth distance distribution, also can unequal tooth pitch distribution. In order to facilitate the manufacture, the reamer is generally distributed according to the equal tooth pitch.
The main angle: processing of steel ductile materials generally =15 degrees; processing of brittle materials such as cast iron usually from =3 DEG ~5 DEG; coarse hinge and the hinge hole, and generally =45 degrees; hand reamers generally take =0.5 ~1.5 degrees. The anterior horn: reaming generally very small margin, the chip is very thin, chip and face contact length is very short, so the effect of the front angle is not significant. In order to make convenient, in general are = 0 deg. Processing of ductile materials, in order to reduce the deformation of the chip, desirable = 5 ~10 degrees. The angle: reamer finishing tool system, in order to make the grinding radial size not too big change, after the general angle of reamer = 6 DEG ~8 deg. The inclination angle: reamer edge angle = 0 deg. But the inclination angle can make the cutting process smoothly, improve the quality of reaming. The reaming toughness larger material, the cutting part of reamer wear = 15 DEG ~20 DEG tiltangle, which can make the reaming of chip forward discharge, not to scratch the surface. In the blind hole, the front reamer with inclination angle in this out of a large pit, to accommodate scraps.
Reamer OD value is small size design; the cutting speed is too low; the feed is too large; the reamer main angle is too small; improper cutting fluid; grinding reamer wear not wear off, to reduce diameter of elastic recovery; steel hinge, margin is too large or the reamer is not sharp, easy to produce elastic recovery. The aperture; the inner hole Buyuan, aperture unqualified.
The reamer is too long, lack of rigidity, vibration reaming reamer; the main angle is too small; with a narrow blade reamer reaming allowance; offset; the surface of the inner hole gap, cross hole; hole surface blisters, porosity; spindle bearing loose, without the guide sleeve or reamer and the guide sleeve with the gap is too large due to the thin; workpiece clamping is tight, the deformation of the workpiece after discharge.
Reaming allowance is too large; the reamer cutting part after angle is too large; reamer blade width; surface pores, trachoma; spindle swing too large.
The cutting speed is too high; improper cutting fluid; reamer main angle is too large, the reamer blade is not on the same circumference; reaming allowance is too large; reaming allowance is not uniform or too small, not to the local surface hinge; reamer cutting part pendulum difference, blade is not sharp, rough surface; hinge the blade with wide reaming; when the chip is not smooth; reamer abrasion; reamer blade with bumps, burr or edge chipping; haveBueBecause of the material; relationship does not apply to zero or negative rake angle reamer.
The material is not suitable in the reamer reamer; grinding burn; inappropriate choice of cutting fluid, cutting fluid to flow smoothly cutting reamer after grinding;Surface roughnessThe value is too high.
The guide sleeve wear; the bottom end of the guide sleeve is too far away from the workpiece; the guide sleeve length and precision spindle;BearingLoose.
Reaming allowance is too large; the workpiece materialhardnessThe cutting edge is too high; the pendulum difference is too large, the cutting load is not uniform; the reamer main angle is too small, so that the cutting width increases; when the hinge hole or holes, cutting too much, and not timely removal; grinding cutter has been grinding crack.
Reaming allowance is too large; the hinge hole, coarse and fine reaming Allowance Distribution and selection of cutting parameters is not suitable; reamer cutter tooth chip space small, chip jam.
Before drilling reaming, especially the pore size is small, the reamer is less rigid, cannot correct the original curvature; reamer main angle is too large; the guide is bad, easy to deviate from the direction of the reamer reaming; the cutting part of the inverted cone is too large; in the hole of intermittent reamer gap displacement; hand hinge the hole, force in one direction is too large, forcing the reamer to end deflection, destruction of reamingVerticality。
According to the specific circumstances of reamer od reduce reduce;cutting speed; adjust the feed or reduce machining allowance; reduce the main angle; the bending straightening reamer or scrap can not be used for;WhetstoneCarefully trimmed to conformity; control of swing in the allowed range; selection of cutting fluid cooling performance better; installation must be before the reamer reamer with taper shank and machine tool spindle taper internal oil wipe, cone bump with hone repair light; grinding flat tail, adjust or replace the reamer; spindle bearing; re floating card head, and adjust the concentricity; pay attention to the correct operation.
Replace the reamer diameter size; increasing cutting speed; due to lower feed; increasing the main angle; selection of cutting oily liquid lubrication performance is good; regular exchange of reamer, correct grinding cutting reamer; design of reamer size, should consider these factors, or according to the actual situation of value; test cutting, take the appropriate allowance the sharp, reamer.
The lack of rigid reamer reamer unequal tooth pitch points, reamer installation should use rigid connection, increase the main angle; selection of qualified reamer, control pre processing holePosition tolerance; with unequal tooth pitch reamer, with longer and more accurate guide; selection of qualified blank; using pitch reamer reaming precision machine tool spindle hole, to adjust the gap, the gap with the guide sleeve should be higher; the clamping method properly, reduce the clamping force.
Reduce reaming allowance; reduce cutting back angle; trim width; select qualified blank; adjust spindle of machine tool.
Cutting speed; cutting fluid according to the material selection process; reduce the main angle, correct grinding blade hinge; reduce reaming allowance; improve the position accuracy and the bottom before the reaming quality or increase reaming allowance; selection of qualified reamers; grinding edge width; according to the specific circumstances of the reamer reduce tooth number, increase capacity groove space or the reamer with cutting edge inclination, the chip successfully replaced regularly; reamer grinding, grinding abrasion in the grinding zone; reamer use and transport process, protection measures should be taken to avoid damage to have bruises; reamer, with super fine aggregate will hurt the reamer. Use oilstone dressing or replace the reamer; to pass the reamer front angle is 5 degrees and 10 degrees.
The reamer material can be selected according to the processing materialCemented carbideReamer orcoatingReamer; strict control of grindingCutting parametersAnd avoid burn; often according to the correct selection of cutting fluid processing materials; often remove the cutting crumbs slot, cutting liquid enough pressure, after fine grinding and grinding requirements.
Changing the guide sleeve regularly, lengthening the guide sleeve, improving the coordination precision between the guide sleeve and the reamer clearance; timely repairing the machine tool and adjusting the clearance of the spindle bearing.
The pore size modification processing; reduce the hardness of the material or with negative rake or hard alloy reamer reamer; control of swing in an acceptable range; increase the main angle; pay attention to the timely removal of the chip or the reamer with edge inclination; pay attention to the grinding quality.
The pore size modification processing; modify the allowance distribution, a reasonable choice of cutting reamer; reduce the number of teeth, Jia Darong crumb space or a tooth to tooth clearance.
Increase reaming or boring procedureCorrectingHole; reduce the main angle; adjust the appropriate reamer; change the guide part or lengthen the cutting part of reamer; pay attention to the correct operation.
Reamer: two kinds of coarse reamer and precision reamer. The reamer has fewer cutting edges, larger chip size, and a spiral chip separation groove on the blade edge, so as to prevent excessive chip clogging during coarse reaming. The reamer has more cutting edges and small edges, so as to ensure the quality of the holes. The commonly used reamer specifications are l:50, 1:20, 1:5: installed on the lathe tool used for cutting metal tools. The welding tool, cutter rod is made in the ordinary steel, cutter processing hard alloy blade corresponding incision, copper solder and borax and brazing. Indexable blade structure is the center hole, the fixed blade of the cutter rod gap with bolts, the blade three or four cutting edges can be turned to use, unlike the welding structure has only one cutting edge can be used. Turning tools are divided into NC turning tools, excircle turning tools, diamond cars, alloy turning tools and carbide turning tools。
The standard name should be called the floating boring tool are called floating reamer. Limited by tool size. This kind of boring cannot do very little to buy is bought back after his head, to do a floating boring bar shank knife machine according to your device settings, can be straight or handle with Morse taper shank arbor to quenching by cutting a groove installation boring head. Tank size tolerances than boring head 0~0.02mm. The size of the boring boring head need to adjust themselves according to machining hole size.