ASTM D617-84(1998)

Standard Test Method for Punching Quality of Phenolic Laminated Sheets (Withdrawn 2003)

SCOPE
1.1 This test method covers the determination of the punching quality of phenolic laminated sheets 1/8 in. (3.2 mm) and under in thickness. It involves the use of a standard punching die and standard punching practice to form punched specimens both at room temperature, designated as cold punching, and at an elevated temperature of 135°C, designated as hot punching, and a standard system for rating the punched specimens produced.  
1.2 The values stated in inch-pound units are to be regarded as the standard.  
1.3 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Withdrawn
• Publication Date: 09-Dec-1998
• Withdrawal Date: 03-Jun-2003
• ICS: 83.140.20 - Laminated sheets
• Technical Committee: D09 - Electrical and Electronic Insulating Materials
• Drafting Committee: D09.07 - Electrical Insulating Materials

Relations

• Referred By: ASTM D229-19e1 - Standard Test Methods for Rigid Sheet and Plate Materials Used for Electrical Insulation
• Effective Date: 10-Dec-1998

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information.
An American National Standard
Designation:D617–84(Reapproved1998)
Standard Test Method for
Punching Quality of Phenolic Laminated Sheets
This standard is issued under the fixed designation D 617; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope Rockwell hardness at room temperature, and Rockwell hard-
ness at 135°C under a definitely prescribed procedure.
1.1 This test method covers the determination of the punch-
ing quality of phenolic laminated sheets ⁄8 in. (3.2 mm) and
4. Apparatus
under in thickness. It involves the use of a standard punching
4.1 Punching Die—A compound die.
die and standard punching practice to form punched specimens
4.2 Oven—An oven that will provide a temperature of 135
both at room temperature, designated as cold punching, and at
6 2°C.
an elevated temperature of 135°C, designated as hot punching,
4.3 Hardness Tester—ARockwell hardness tester conform-
and a standard system for rating the punched specimens
ing to the requirements prescribed in Test MethodsE18.
produced.
1.2 The values stated in inch-pound units are to be regarded
5. Test Specimens
as the standard.
5.1 Punching Test Specimens—Use two strips of the mate-
1.3 This standard does not purport to address all of the
rial, each 1 ⁄8 in. (41 mm) in width by 12 in. (305 mm) in
safety concerns, if any, associated with its use. It is the
length,onecutlengthwiseandonecutcrosswisefromthesheet
responsibility of the user of this standard to establish appro-
for punching out specimens in the compound die. The dimen-
priate safety and health practices and determine the applica-
sions of the punched specimen are shown in Fig. 1.
bility of regulatory limitations prior to use.
5.2 Hardness Test Specimens—The specimen for the cold
Rockwell hardness test and hot Rockwell hardness test shall
2. Referenced Documents
conform to that prescribed in Test Method D 785, except that
2.1 ASTM Standards:
the specimen for the hot Rockwell hardness test shall be 1 in.
D 229 Test Methods for Rigid Sheet and Plate Materials
2 (25 mm) square.
Used for Electrical Insulation
D 785 Test Method for Rockwell Hardness of Plastics and
6. Preparation of Apparatus
Electrical Insulating Materials
6.1 The results obtained with this test method will depend
E18 Test Methods for Rockwell Hardness and Rockwell
4 upon the care taken in properly assembling the die as well as
Superficial Hardness of Metallic Materials
in the condition of the punch and die. It is recommended that
3. Significance and Use a standard die set be used in order to ensure proper alignment
of the punch and die at all times. Examine the cutting edges of
3.1 This test method further provides for a control test on
the punches, as well as those of the die, for sharpness. If the
uniformity of punching quality after this property has been
surfaces are not flat and if the edges are not sharp, it is
determined with the punching die for a particular grade and
advisable to grind the surfaces of both the punch and die to
thickness. The control test consists in the determination of
ensure good punching.
This test method is under the jurisdiction of ASTM Committee D-9 on
Electrical and Electronic Insulating Materials and is the direct responsibility of
Subcommittee D09.07 on Flexible and Rigid Insulating Materials. Another punching method in use is the German punchability rating system DIN
Current edition approved Nov. 30, 1984. Published January 1985. Originally 53-488.CopiesareobtainableatanominalcostfromASTMHeadquarters,100Barr
issued as D 617 – 41 T. Last previous edition D 617 – 84 (1989). Harbor Drive, West Conshohocken, PA 19428. Request Adjunct No. ADJD0617.
2 6
Annual Book of ASTM Standards, Vol 10.01. Detailed drawings of the dimensions of the compound die are available at a
Annual Book of ASTM Standards, Vol 08.01. nominal cost from ASTM Headquarters, 100 Barr Harbor Drive, West Consho-
Annual Book of ASTM Standards, Vol 03.01. hocken, PA 19428. Request adjunct No. ADJD0617.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D617–84 (1998)
punching the harder materials in thicknesses over ⁄32 in. (2.4
mm) at room temperature, in order to prevent undue stress on
the die.
7.3 Hot Punching—When strips are punched at elevated
temperatures, they shall be heated for 15 min in an oven at
1356 2°C, removed one at a time from the oven, and punched
immediately.The strips shall be heated for not less than 15 min
nor more than 20 min. Stagger the placing of these strips in the
oven so that the heating time will be within the required period
(see Appendix X1).
8. Rating Punching Quality
8.1 To evaluate punching quality, the edges, surfaces, and
holes of the punched specimens shall be rated separately in
accordance with a point rating system ranging from 100 or
excellent to 0 or worthless in accordance with Table 1. The
Inch-Millimetre Equivalents
averageofthesethreeratingsoneachspecimenshallconstitute
1 1 1 3 1 5 3 7 1 9
in. 0.005 ⁄64 ⁄32 ⁄16 ⁄32 ⁄8 ⁄32 ⁄16 ⁄32 ⁄4 ⁄32
the measure of the punching quality of the material. (See Fig.
mm. 0.13 0.4 0.8 1.6 2.4 3.2 4.0 4.8 5.6 6.4 7.1
X2.1, Fig. X2.2, and Fig. X2.3,in Appendix X2 illustrating
5 3 7 5 15 3 1 7
in. ⁄16 ⁄8 ⁄16 ⁄8 ⁄16 1 ⁄32 1 ⁄8 1 ⁄32
mm 7.9 9.5 11.1 15.9 23.8 27.8 28.6 31.0 typical characteristics of punched specimens and point ratings
of these characteristics.)
FIG. 1 Punched Test Specimen
9. Procedure for Rockwell Hardness Control Test
6.2 Set the punching die in the press in a vertical or slightly
9.1 Rockwell Hardness Test—Use Rockwell hardness as a
inclinedpositionandalignitwell.Thepunchshallenterthedie
1 1 control test for keeping a check on the punching quality. When
about ⁄64 to ⁄32 in. (0.038 to 0.8 mm). The clearances
the material is to be punched cold, determine the Rockwell
maintained between the punch and die shall be 0.002 in. (0.05
hardness at room temperature and when punched, hot, deter-
mm).
mine the hardness at an elevated temperature.
7. Procedure for Punching 9.2 ColdRockwellHardness—DeterminethecoldRockwell
hardness as described in Test Method D 229.
7.1 Punch specimens out individually by means of foot
9.3 Hot Rockwell Hardness—Determine the hot Rockwell
release of the press. Do not use continuous punching of
hardnessingeneralasdescribedinTestMethodD 229withthe
specimens. Guide the strips so that the punched specimen is in
following additional precautions necessitated by the elevated
the center of the strip. Punch no specimens closer together than
temperature:
twice the thickness of the strip. The length of stroke of the
1 1
punch shall be between 1 ⁄2 to 2 in. (38 to 50 mm) and the 9.3.1 Place enough pieces to make a ⁄4-in. (6.3-mm) pile-up
speed running idle shall be between 100 to 150 rpm. for the test specimen one layer deep in the oven at 135 6 2°C
7.2 Cold Punching—When strips are punched at room for not less than 15 min nor more than 20 min. Discard any
temperature, record the temperature. It is advisable to avoid pieces left in the oven for more than 20 min since any extra
TABLE 1 Point Rating of Punched Specimens
Point
Rating Edge Surface Holes
Score
Excellent 100 Clean cut Unaffected Clean cut, no bulging
Very good 90 Very slight chipping or very slight Microcscopic cracks around edges of Slight chipping in walls of holes or very
drag piece or holes slight bulging around hole
Good 80 Slight chipping or slight drag Very slight surface cracks around edge Some ch
...