i

t c 0 o

UDC 681.945 DEUTSCHE NORMEN January 1973

I E N

c .- E L

C

.- c - 2

3 2 x

m

Knurls 82 I I

Rändel

Dimensions i n mm

Denomination and representation

Knurl with grooves paral le l t o axia

Detai l T

A Section A-A --I

d r k p i e c e 4 A

Section B-6 Left-hand h u r l

Workpiece

Manufacturing methods using h u r l i n g r o l l s according t o DIN 403

Knurl RAA

Workpie

I Knurling r o l l AA

Knur? RAA Knur? RAA

lorkpie Workpiec

\ I

Knurling roll^ ewivel led 30'

Knurling r o l l BL swivel led 30°,

Workpie

Knurling ról l BR Knurl& r o l l AA swivel led 30°

Knurl RBR n

dorkp

I \ Knurling r o l l AA swivel led 30°

Knurling roll BL

€BR

-

Continued on pages 2 to 4 Explanations on page 4

Alleinverkauf der Normblätter durch Beuth VerlagGmbH, Berlin 30 und Köln DIB 82 engl. Preisgr.

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PaEe 2 DIN 82

m -

RGE

RGU

-

tKE

-

Denomination arid repreeentation

Lei t-hand/rigùt-hand hurl, pointe raised' )

Section 0-0

üoripie ce

Lei t-hand/right-hand hurl, pointe indented*)

Section F-F

Detail x

Yorkpiec.

- 4G

section G-G

Croes-knurl,

Uorkp iec e

points raised Section H-H

Detail Y J U

Sec tion J-J

--i J

'1 Previous denomination "Diamond hurling" 2, Previous denomination "Negative diamond hurling"

Manufacturing methode using b u r l i n g r o l l e according to DIN 40:

swivelled 30'

I Knurling roll 81 h u r l i n g r o l l 1 1

Knurl RGV 1

Workpi

/ burling roll GE

Knurl RKE /

/ hurling rol l KV

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D I N 82 Page 3

Denomination and representation

Cross-knurl, po in ts indented Section K- K

Section L-L

Manufacturing methods using h u r l i n g r o l l s accordingtoDIN 405

Knurl RKV I

RAA Knurl v i t h grooves parallel t o axis

RBR Right-hand knur l RBL Left-hand k n u r l

RGE Left-hand/right-hand knurl, points

RGV Left-hand/right-hand knurl, p o i n t s

RKE Cross-knurl, p o i n t s r a i sed

r a i sed

indented

Workpi

d l -0,5 t

d l -0.67 t

dl -0.33 t

dl -0,67 t

/ Knurling r o l l KE

Designation of a left-hand/right-hand knurl , po in t s r a i sed (Type RGE) with p i t ch t - 0.8 mm Knml RGE 08 DIN 82 (08):

2. Dimensions 2.1. P r o f i l e an& Prof i l e angle a 90°. I f necessary, knurls can a l s o be made with p r o f i l e angle a - 105O. i n t h i s case, t he designa- t i on reads, e. ., f o r a left-hand/rlght-hand knurl , pointe r a i sed (Type RGE) with p i t ch t = 0.8 mm (087 and p r o f i l e angle a - 105O (105):

-----------_---

Knurl RGE O8 - 105 D I N 82

'Po minimize the number of lmurling r o l l e required f o r making the knurls, the knurl p i tches t are l imi ted t o the nominal values

0.5 0.6 0.8 1 1.2 1.6 m.

The nominal diameter d l s t a t ed i n the workshop drawing i s the outside diameter of the fin- ished knurl; t h i s dimension i s a function of the design. 2.4. I n i t i a l diameter d2 The i n i t i a l diameter d of the workpiece p r i o r t o h u r l i n g muet be smaller than the nominal diameter d l , because t i e i n i t i a l diameter undergoes enlargement through displacement of the mater ia l during the h u r l i n g operation. The i n i t i a l diameter d2 for h u r l e with p r o f i l e angle a = 90° can be ca lcu la ted from the f o r - mulae i n the Table below, depending on t h e type of knurl and t h e s i a e of pitch. The f ac to r s i n the fonuulae, however, do not take i n t o account the rounding of t he grooves r e su l t i ng from the h u r l i n g operation or t h e spec i f ic proper t ies of the materiale t o be knurled.

---------------------

Type of k n u r l I I n i t i a l diameter I d2-

I RKV Cross-knurl, p o i n t s indented I d l -0.33 t I

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Page 4 DIB 82

References to further etandards

DIB 403 h u r l i n g rolls DIB 8583 Sheet 5 Production method compression foming; inipreeaing, c lassif icat ion, defini-

tions

Explanations

Compared with the January 1940 issue of DIN 82, t he standard denomination "knurl" has been adopted f o r a l l types, s ince the previous denominations "diamond knurling" and "negative diamond knurlíng" vere not used conaia ten t ly , and hence d i f f i c u l t i e a a rose i n the choice of toola. Some type8 of knurl have been given b r i e f e r denominations, auch ea left-hand h u r l , right-hand knur l , left-hand/right-hand b u r l . The type l e t t e r symbols assigned t o the various types provido both for b e t t e r d i f f e r e n t i a t i o n and a l s o y ie ld a code deaienation f o r use in e lec t ron ic da ta processing. The l e t t e r R d i f f e r e n t i a t e s t he b u r l a Zrom t he h u r l i n g r o l l e (aee DIN 403). the second l e t t e r (A, E, (i and K) des igna tes the bas ic type. v h i l e t the t h i r d l e t t e r (A - p a r a l l e l t o ax ia , L - left-hand, E - right-hand, E - r a i sed , Y - indented) marks t h e d i r ec t ion and form of the groovea. The h e l i x cingle o f Types BB, BL. GE and QV is f ixed a t standard value of 30'. The p r o f i l e an&e is n o m a l l y a = 90°, be made. This spec ia l case must be s t a t e d in t he designation. The p i t c h t - 2 mæ has been discontinued becauBe it is scarce ly uaed in prac t ice . S imi la r ly , no attempt haa been made t o c o r r e l a t e p i t c h v i t h uorkpiece diameter, s ince recommendations made e a r l i e r have not proved s u i t a b l e i n a11 f i e l d s of appl ica t ion and hence t h s i r adoption in a c t u a l p rac t i ce has been l i m - i t ed . Formulae f o r ca l cu la t ing the i n i t i a l diameter of t he workpiece a s a function of t he type of knurl and of the outs ide diameter of t he f in i shed h u r l , which counts as the nominal diameter, a r e given. The re- s u l t s obtained a r e only re ference values. however, s ince the spec i f i c p rope r t i e s of t he mater ia l s hare not been taken i n t o account. To f a c i l i t a t e t he ChOOBing of h u r l i n g r o l l e aCCOrdin& t o DIN 403, the manufacturing methods s u i t a b l e f o r each type of b u r l are indicated.

but, I f necessary, knurls with a p r o f i l e a = 10.50 - giving a sha l louer depth - can

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