Technology of aggrandizement of bolus of spring in season is normative

This standard applies to limits to rupture with rise and improving bedspring exhaustion intensity and stress to corrode the engineering technology of gush bolus aggrandizement that intensity is a purpose. Include: Columnar helix compresses bedspring and car leaf spring, the gush bolus processing of other bedspring can consult use. This standard stipulated columnar helix compresses bedspring (abbreviation round reed) with car leaf spring (abbreviation board reed) clamping apparatus of the requirement of medium of bolus of the suitable scope of gush bolus aggrandizement, term, gush, test piece, test piece and arc height are measured provide, technology. 2.

Normative sex cites the clause in following file passes the document the cite and makes this standard provision of this standard. The citation that always fixes date, its subsequently all modification sheet (the content that does not include correct errors in printing) or make edition all do not apply to this standard, however, encourage each research that comes to an agreement according to this standard to whether can use the newest version of these files. The citation that always does not fix date, its latest edition applies to this standard originally. Bolus of GB/T6481 cast steel (did not appear in the standard) GB/T230 of GB/T1805 bedspring term.

1 metal Rockwell hardness experiments (did not appear in the standard) GB/T4340.

Does 1 metal diamond pyramid hardness experiment: of the 1st part? Did not appear in standard of? of any of several hot spice plants of v/LIT all over the ground Ju) test piece of height of arc of GSBA69001 gush bolus 3.

Term and definition are following term and definition apply to this standard, the others presses the regulation in GB/T1805 bedspring term. 3.

Parameter of craft of aggrandizement of 1 gush bolus is angle of discharge of speed of hardness of measure of thrum bolus material, pill, bullet, bullet, bullet, eject, eject time, spray gun or centrifugal round of distance to spare parts surface. 3.

2 A Erman test piece (Almen test piece) it is the test piece of a kind of appropriative that is used at parameter of craft of aggrandizement of bolus of integrated magnanimity gush, test piece of the following abbreviation. 3.

Clamping apparatus of 3 test piece is the tool that is used at securing test piece. 3.

Test piece of 4 arc height issues exterior layer to produce plasticity shedding to change in the concussion of the bullet, bring about test piece to show spherical shape to bend to gush bolus face. Take one plane to be cut as datum plane be out of shape spherical inside, call arc height to the distance between spherical apogee by this datum plane. 3.

5 arc height is measured providing is to use a kind when the arc height that the generation inside length limits provides in place after bolus of gush of test piece classics is worth at determining special measure a tool. 3.

Curve of 6 arc height is below the condition with changeless parameter of other craft of gush bolus aggrandizement, the test piece of same kind accepts the gush bolus of different time severally respectively, obtain height of a group of arc to be worth F to follow T of gush bolus time (or gush bolus frequency) metabolic data, be worth in camber by this group of data - the curve that the scale on time coordinate gives, call arc height the curve. 3.

A saturation exists to nod only on the arc height curve that parameter of any a group of craft leave intensity of 7 gush bolus, cross this saturation to nod arc height the value lets gush bolus time and slow heighten. In the one times gush that nods at saturation bolus time falls, 10% what the increment that camber is worth does not exceed saturated dot to be in camber to be worth, the gush bolus intensity that the camber cost that saturated dot manages is parameter of this groups of craft with respect to the definition. 3.

8 surfaces are enclothed lead part getting in season apparently the area that crater occupies and the specific value that get gush surface gross area, call the surface to enclothe rate (abbreviation is enclothed rate) , express with percentage normally. 3.

Bolus of 10 ordinary in season (free gush bolus) bedspring is being made without any outside force use and gush bolus aggrandizement is accepted to handle freely below normal temperature. 3.

11 stress / bedspring of bolus of gush of meet an emergency accepts gush bolus aggrandizement to handle below constant outside force action. 3.

Bedspring of bolus of 12 multistage gush is accepted several times (normally 1 come 3 times) processing of gush bolus aggrandizement. 4.

Craft of aggrandizement of bolus of gush of principle of gush bolus aggrandizement is the pill that uses high speed campaign shed pair of metal surfaces pound and make the surface produces layer of circular plasticity meet an emergency, bring about this to the microstructure of the layer produces advantageous change and make surface layer introduces remains to press stress field from this. The microstructure of surface layer and remains press stress field is the exhaustion that raises metallic stuff and its spring (include microseism exhaustion) rupture to be corroded with stress (contain hydrogen fragile) rupture the two aggrandizement factor that defies force, in order to raise the dependability of bedspring and wear. 5.

The requirement of gush bolus medium 5.

The sort of 1 bullet and material see a table character 1. Express appearance of simple cardinal principle of material of 1 name symbol general diameter (Mm) hardness HRC (HV) cut into shreds bolus CW steel is columnar 0.

2 ～ 337.

0 ～ 62.

5 (350 ～ 750) finishing steel wire cuts bolus CCW steel to pour round cylinder 0.

2 ～ 337.

0 ～ 62.

5 (350 ～ 750) ≤ of ball of cast steel of SS of cast steel bolus 420.

0 ～ 66.

0 (226 ～ 850) ≤ of ball of glass of vitreous bolus GB 146.

0 ～ 52.

5 (450 ～ 550) ≤ of ball of pottery and porcelain of CB of bolus of pottery and porcelain 149.

5 ～ 64.

0 (500 ～ 800) note ① : The round reed of general use recommends use finishing steel wire to cut bolus, cast steel bolus, its hardness is worth 49.

5HRC ～ 62.

5HRC (500HV ～ 750HV) ; Note ② : The board reed of general use recommends use finishing steel wire to cut bolus, its hardness value is 44HRC ～ 52HRC. 5.

Surface of appearance of every of 2 pills form is shown glossily globose or the bullet that ellipsoid form and dimension accord with formulary norms to ask all calls eligible bullet (if pursue,1 is shown) . And the appearance presents acute angle giving a tip or show long acerose bullet, the pill that trachoma and stoma contain in casting bolus and dimension exceed the pill that provides specification, all call unqualified bullet. Form of eligible pill of 1-1 of figure of eligible pill figure is unqualified pill form ａ ) show long acicular, trachoma is amiable the bullet ｂ of aperture) the bullet of acerb horn pursues 1-2 is unqualified pill form pursues 1 pill form 6 test piece 6.

1 model is to use 70 bedspring steeliness to become, share standards of 3 kinds of measurement, its symbol is N, A, C respectively. The main technique standards of 3 kinds of test piece should accord with a watch 2 medium requirements, other technology condition should accord with the requirement of GSBA69001. Express length of NAC of model of 2 projects test piece (Mm) 76.

11 ± 0.

29 width (Mm) 18.

99 ± 0.

06 ply (Mm) 0.

79 ± 0.

021.

29 ± 0.

022.

38 ± 0.

02 flatness deviation (Mm) ± 0.

025 surfaces surface roughness (μ M) 0.

63 ～ 1.

25 surfaces hardness (HRC) 44 ～ 506.

A of 2 scope of application test piece is applied to in intensity limits; N test piece applies to low intensity limits; C test piece applies to high strenth limits. Clamping apparatus of 7 test piece and arc height are measured 7.

Clamping apparatus of 1 test piece uses structural steeliness to build, hardness should be more than 55HRC. The appearance of clamping apparatus and dimension should accord with a graph 2 medium requirements. Ab pursues clamping apparatus of 2 test piece and structural dimension graph 7.

2 arc height measures the height that provide arc provide and construction and dimension precision press a plan the regulation of 3. Graph 3 arc height is measured reach structural dimension to pursue 8 technologies ask 8.

The preparation before 1 gush bolus 8.

1.

1 besides special make clear besides (need to undertake to surface of partial gush bolus cutting is machined for example) , the dimension before bolus of spring in season and exterior surface roughness should satisfy the requirement on the design. 8.

1.

2 bedspring should complete formulary heat treatment before gush bolus. 8.

1.

The nondestructive of 3 bedspring detects should finish before gush bolus is handled. When having special demand, also can be after gush bolus undertake. 8.

1.

Ying Qingjie of surface of the 4 bedspring that stay in season, dry, without smeary. 8.

The processing after 2 gush bolus 8.

2.

In the follow-up working procedure after 1 gush bolus if want pair of spring when adding heat treatment, its heat temperature must not exceed 245 ℃ . 8.

2.

The bedspring after 2 gush bolus allows to use mechanical method to rebuild below special situation, but allow to bear in bedspring only undertake on the direction of bear. 8.

2.

The gush bolus aggrandizement of 3 bedspring does not allow to do hardness test inside the area. 8.

2.

The appropriate after 4 gush bolus adopts the pill of the methodological purify remains that does not mar bedspring appearance. 8.

The quality of 3 gush bolus 8.

3.

After intensity of 1 gush bolus and bolus of gush of course of tolerancepublic errand bedspring are handled, gush bolus intensity should press draft regulation, and according to 6.

2 are chosen take. The design did not give out when the public errand of gush bolus intensity, gush bolus intensity has only deviation. Regulation of tolerancepublic errand limits is 0 ～ + 30% , the least value of tolerancepublic errand do not answer under 0.

08mm. 8.

3.

Of the surface after 2 gush bolus enclothes bolus of gush of rate bedspring classics enclothe rate should be more than be equal to 90% . 9.

Examine regulation and experiment method 9.

Law of proved recipe of check of intensity of 1 gush bolus. 9.

1.

1 get off test piece from clamping apparatus, it is with precision 0.

The dial gauge of 01mm, measure in arc height on measure arc height. 9.

1.

2 take test piece again additionally, repeat 9.

1.

1 in sets operation, can obtain several experiments to nod (the trial that should win 6 above at least nods) , these data the picture is in camber, on graph of coordinate of gush bolus time, if pursue,can obtain 5 curves (namely camber curve) . Graph 4 arc height measures sketch map to pursue 5 camber graph 9.

2 enclothe the law of check proved recipe of rate to use 10 times magnifier visual, contrast graph 6 ～ pursue 9 make judgement. Graph 6 - 98 ％ ; Graph 7 - 90% ; Graph 8 - 60% ; Graph 9 - 50% . Appendix A (data sex appendix) A of equipment of gush bolus aggrandizement.

The equipment of aggrandizement of bolus of fashion in season that bolus of move of 1 basis drive moves can divide for two sort model: ---Give priority to the equipment of gush bolus aggrandizement that make with machine of ball of gush of mechanical and centrifugal type; ---With pneumatic gush ball machine gives priority to the equipment of gush bolus aggrandizement that make. A.

The equipment of gush bolus aggrandizement of two kinds of 2 types can provide the following unit according to need: A) pill measure chooses unit; B) broken bullet is grading device; C) device of bullet flow control; D) the stable unit that reduces airy discharge and pressure; E) the convulsions of room of gush bolus aggrandizement discharges dirt device. A.

The imitate of 3 bedspring bedspring imitate it is to use those who adjust parameter of craft of gush bolus aggrandizement, also be to use the tool that examine and controls quality of aggrandizement of bolus of spring in season at the same time. Should satisfy the following requirement: A) serve as imitate with real spring spare parts, or the imitate that machines bedspring additionally; B) imitate processing is accepted below the same condition that should producing actually with bedspring; C) imitate go up the requirement that the position of fixed camber test piece and amount should satisfy a design to set. D) pass imitate experiment, become only imitate on when obtained gush bolus strength achieves the requirement that sets on bedspring design, just can undertake to bedspring gush bolus is produced. Appendix B (data sex appendix) intensity of bolus of the gush before gush bolus and enclothe the adjustment of rate B.

The 1 camber that adjusts place of gush bolus intensity to use spends test piece, lie when gush bolus intensity 0.

15 ～ 0.

When 60Amm limits, should use A test piece; Be more than when gush bolus intensity 0.

When 60Amm, should use C test piece; Be less than when gush bolus intensity 0.

When 15Amm, use N test piece. Test piece clamping apparatus and arc height are measured should accord with the regulation of 7. The gush bolus intensity of general and general bedspring should be used 0.

18C, but the bedspring of special norms should according to particular case separately make choice of. B.

The 2 imitate that secure test piece clamping apparatus each gush bolus position in draft regulation respectively go up. Secure test piece on clamping apparatus again. B.

3 imitate put the spare parts tool with gush indoor ball, the locomotive orgnaization of actuate tool is hand-in-hand bolus of travel in season. Debus test piece measures its camber value for datum plane with be not gush bolus face. The gush bolus test piece of debus must not be used again. New mount new test piece, have gush ball and measure arc height. With 5 ～ classics of 7 test piece differs time (or gush bolus frequency) after gush bolus, obtain curve of an arc height. Decide gush bolus intensity by this curve. B.

The prep above of 4 gush bolus intensity that should measure by above measure or when providing a value under the design, should adjust craft parameter (wait like bullet speed) , till till obtain a draft,the regulation is worth. CNC Milling