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Straight shank reamer / hand reamer 345678910111213141516171820

H7, H8 precision reamer, if no special requirements, random delivery!

discount 70% in 2018-10-16 to 2018-10-18
price: USD$ 10.50
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Product nameStraight shank hand reamer

Specifications range: 3H7-25H7

ReameraccuracyThere are D4, H7, H8 and so onPrecision grade

Essential information:Straight shank hand reamerRotation of thin metal with one or more cutter teeth to remove the surface of machined holetoolA 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.

Reamers used for machining cylindrical bores are commonly used. The reamer used for machining tapered hole is taper reamer, which is less used. According to the use situation, there areHand reamerThe machine reamer can be divided into machine reamer and machine reamerStraight shank reamerTaper shank reamer. The hand is straight handle type.
Species: Most of the reamer structure is composed of the working part and the shank. The main part of the work is cutting and calibration function, the calibration Department diameter has inverted taper. The handle is used for clamping by the fixture, and the straight handle and the taper handle are divided.
According to different purposes, reamer can be divided into many kinds, so the standard of reamer is more, and some of our commonly used standards have GB / T1131 hand reamer, GB / T1132Straight shank machine reamerGB / T1139 straight handle MohsCone reamerWait。
The reamer is divided into hand reamer and machine reamer according to its usageReamingThe shape is divided into cylindrical and conical reamer. (standard taper reamer has 1:50 taper pin, reamer and reamerMorse taper reamerThere are two types of reamers. The flute of the reamer has straight groove and spiral groove. The commonly used material is high speed steel. Hard alloy insert
The hand reamer is made of alloy tool steel (9SiCr), the machine reamer is made of high speed steel (HSS), and the machine reamer is divided into straight shank machine reamer and machine reamerTaper shank machine reamer.
Installation clip method, belt handle type and sleeve type two kinds.
According to the shape of the alveolar slot, there are two kinds of straight groove and spiral groove.
Manual reaming: general attention should be paid to: 1. the workpiece should be clamped in the.2. reaming process, the balance of the two hands should be balanced, and the.3. reamer can not be reversed when it exits, because the reamer has a rear angle, and the reverse of the reamer will cause the chip plug to be behind the reamer toothThe hole wallBetween the hole wall scratches; at the same time, the reamer is easy to wear,.4. reamer is used, to clean, coated with oil, box, so as not to hurt the edge
Two. Pay attention to the reaming speed and the amount of cutter when machine hinges (check the manual of metal cutting)
Three. Reasonable cooling lubricant must be used in reaming
The taper of the guide cone used for hand is smaller, the front angle and back angle are smaller, the blade is sharper, the common blade is narrower, or the guide cone is not.

Design points:Determination of reamer diameter and its tolerance

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.

Tooth number and tooth slot of reamer

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 geometric angle of reamer

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.

The causes of the problem:The increase of the pore size, large error

The reamer diameter size design value is too large or hinge edge burr; the cutting speed is too high; the amount of feed improper or excessive machining allowance; reamer reamer main angle is too large; bending; reamer blade attached built-up; grinding blade hinge pendulum difference;cutting fluidImproper installation; when the reamer taper surface oil is not clean or cone is knocking; taper flat tail deviation in the spindle after taper cone interference; axis bending or spindle bearing too loose or damaged; floating reamer is not flexible; and different workpiece axis; two hand hand reaming force uniform, make the reamer shaking.

Narrow aperture

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 hinge hole Buyuan

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.

The inner surface of the hole has obvious edge surface

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 inner hole surface roughness value is high

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 low service life of 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 precision of hole position hinges outoftolerance

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.

Reamer cutter tooth chipping

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.

Reamer stem fracture

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.

After reaming hole center line is not straight

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

Solution: the increase of the pore size, large error

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.

Narrow aperture

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 hinge hole Buyuan

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.

The inner surface of the hole has obvious edge surface

Reduce reaming allowance; reduce cutting back angle; trim width; select qualified blank; adjust spindle of machine tool.

The inner hole surface roughness value is high

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 low service life of reamer

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.

The precision of hole position hinges outoftolerance

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.

Reamer cutter tooth chipping

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.

Reamer stem fracture

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.

The center line of the hole after reaming is not straight

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.

What's the difference between reamer and turning tool?

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 usage of floating reamer

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.