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1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefr
2、om, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. QUESTIONS REGARDING THIS DOCUMENT: (724) 772-8512 FAX: (724) 776-0243 TO PLACE A DOCU
3、MENT ORDER; (724) 776-4970 FAX: (724) 776-0790 SAE WEB ADDRESS http:/www.sae.org Copyright 1985 Society of Automotive Engineers, Inc. All rights reserved.Printed in U.S.A. SURFACE VEHICLE 400 Commonwealth Drive, Warrendale, PA 15096-0001 RECOMMENDED PRACTICE An American National Standard J1303 ISSUE
4、D FEB85 Issued1985-02 CUTTING EDGE - CROSS SECTIONS LOADER STRAIGHT ForewordThis Document has not been changed other than to put it into the new SAE Technical Standards Board Format. 1.ScopeFor cutting edges used on buckets for loaders defined in SAE J1057a. The dimensions are applicable to rolled,
5、cast, forged, flame cut, and machined cutting edge sections. Straight cutting edges are defined as those whose leading edge and rear edge are parallel and, thus, are of constant cross section. For “straight cutting edge sections with bolt holes,“ see SAE J1304 FEB85. NOTEFor some heavy duty applicat
6、ions, cross sections with larger blunts and greater bevel angles may be required. 1.1PurposeTo specify dimensions for straight cutting edge cross sections to be used on loader buckets as described by SAE J731d. This recommended practice was conceived to minimize the number of different cutting edge
7、sections used, therefore, allowing for possible future standardization of replacement cutting edges and weld-on tooth adapters. 2.References 2.1Applicable PublicationsThe following publications form a part of the specification to the extent specified herein. Unless otherwise indicated the latest rev
8、ision of SAE publications shall apply. 2.1.1SAE PUBLICATIONSAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001. SAE J731dComponent Nomenclature SAE J1057aIdentification Terminology of Earthmoving Machines SAE J1304 FEB85Cutting Edge - Cross Sections Loader Straight with Bolt Holes
9、 3.Dimensions and TolerancesSee Figure 1 and Table 1 for recommended specifications. SAE J1303 Issued FEB85 -2- FIGURE 1DIMENSIONS ASSOCIATED WITH LOADER STRAIGHT CUTTING EDGE CROSS SECTIONS TABLE 1DIMENSIONS FOR LOADER STRAIGHT CUTTING EDGE CROSS SECTIONS A Thickness(1) B Section Width(2) Bevel Ang
10、le(3) C Blunt(1) mminmmindegmmin 100.39 80 3.1523 20.08 100.39100 3.9423 20.08 120.47 80 3.1523 20.08 120.47100 3.9423 20.08 120.47150 5.9123 20.08 160.63 80 3.1523 30.12 160.63100 3.9423 30.12 160.63150 5.9123 30.12 200.79100 3.9423 40.16 200.79150 5.9123 40.16 200.79200 7.8723 40.16 220.87100 3.94
11、23 40.16 220.87150 5.9123 40.16 SAE J1303 Issued FEB85 -3- PREPARED BY THE SAE OFF-ROAD MACHINERY TECHNICAL COMMITTEE 220.87200 7.8723 40.16 250.98200 7.8723 50.20 250.98230 9.0623 50.20 250.98250 9.8423 50.20 301.18200 7.8723 60.24 301.18250 9.8423 60.24 351.38200 7.8723 70.28 351.38250 9.8423 70.2
12、8 401.58250 9.8430120.47 401.5830011.8130120.47 451.77250 9.8430140.55 451.7730011.8130140.55 501.9730011.8130150.59 501.9735013.7830150.59 501.9740015.7530150.59 602.3635013.7830180.71 602.3640015.7530180.71 702.7640015.7530210.83 702.7645017.7230210.83 803.1550019.6830240.94 903.5455021.6530271.06
13、 1003.9460023.6230301.18 1.Thickness and blunt tolerance are each to be: 0.4 mm for 10 mm thick; 0.8 mm for 12 mm and all thicknesses up to and inclusive of 16 mm; 1.0 mm for 20 through 25 mm thick; 1.2 mm for 30 through 50 mm thick; 1.6 mm for all thicknesses 60 mm and above. 2.Width tolerance to b
14、e: 1.6 mm for all widths up through 100 mm; +2.41.6 mm over 100 through 125 mm; +3.22.4 mm over 125 through 200 mm; 3.2 mm for all widths over 200 mm. 3.Angle tolerance to be: +1/2 deg for all thicknesses up through 35 mm on rolled and machined sections and 2 deg for cast, forged, and flame cut sect
15、ions; 2 deg for thicknesses over 35 mm. TABLE 1DIMENSIONS FOR LOADER STRAIGHT CUTTING EDGE CROSS SECTIONS (CONTINUED) A Thickness(1) B Section Width(2) Bevel Angle(3) C Blunt(1) mminmmindegmmin SAE J1303 Issued FEB85 RationaleCutting edges used on loader buckets currently exist having a variety of d
16、ifferent cross sectional shapes and dimensions. These numerous configurations were created by the various loader manufacturers to match the performance criteria of the loader and the different loader applications encountered. Resulting cutting edge cross sections varied not only in thickness and wid
17、th, but also varied significantly in the bevel angle and blunt dimensions. Two major problems result from having varied cross sections on similar loader cutting edges. First, replacement cutting edges for buckets are not interchangeable if the cross sections are different in thickness and section wi
18、dth. Deviations in bevel angles can even effect cutting edge interchangeability on some bucket designs. Therefore, bucket cutting edge replacement necessitates utilization of cross sections identical to the original section to avoid additional costly bucket rework. The second problem with varied cro
19、ss sections is that each requires a different tooth adapter to insure proper fit up. Bucket teeth are used for numerous loader applications and on all sizes of loaders. Therefore, bucket teeth must be considered when selecting a cutting edge cross section for a loader bucket. Two primary types of bu
20、cket teeth are used: (1) weld-on, (2) bolt-on. Bolt-on teeth require drilled cutting edges. Refer to SAE J1304, Cutting EdgeCross Sections Loader Straight With Bolt Holes. Weld-on bucket teeth are utilized on the cross sections described in this document. Cutting edge section width, thickness, bevel
21、 angle, and blunt are all critical for proper weld-on tooth adapter fit up. Overall, interchangeability of replacement cutting edges and bucket teeth is currently minimal. Therefore, the purpose of this document is to provide a guideline for standardization of loader straight cutting edge sections s
22、uch that a minimum number of replacement loader cutting edges and bucket teeth are required for the overall industry. In addition, a foundation is established for future standardization of bucket teeth. The scope of this document entails only those cutting edge sections used on loaders for earthmovi
23、ng machines in the “construction“ category. Cutting edge sections used in other categories such as “general purpose industrial“ and “underground“ may resemble those used in the “construction“ category but since the applications are quite different, are not included at this time in the scope. These c
24、ategories could be added to the scope in the future if investigation reveals close correspondence of cutting edge sections utilized. Straight cutting edge sections (those whose leading edge and rear edge are parallel and, thus, are of constant cross section) are the only type considered in this docu
25、ment. Review of cutting edges other than straight where the cross section varies along the length of the cutting edge (spade nose, V-edge, etc.) will be done in the future to determine if a document can be prepared that would allow for interchangeability of bucket teeth and replacement edges. This d
26、ocument is applicable to manufactured sections that are rolled, cast, forged, machined, and flame cut. Tolerances for all processes are inclusive in the document. The selection of cross sections used in this document was established based on several guidelines. First it was decided that all sections
27、 should be based on metric plate sizes exclusively. A survey was then made industry-wide to determine the various sections currently being used by the different loader manufacturers. Results of this survey showed that section thicknesses varied from 0.38 to 4.00 in thick. Therefore, metric thickness
28、es were selected from 10 to 100 mm in the available metric plate sizes closest to a corresponding nonmetric plate size in use for cutting edges. The survey showed that section widths varied considerably for a given section thickness but that, in general, two to three widths were most common and had
29、the highest utilization. Thus, even metric section widths were adapted that came closest to matching the high usage widths for each section. SAE J1303 Issued FEB85 Blunt dimensions were found to exist from almost 0 to 50% of the section thickness. Small blunts are favorable for ease of cutting edge
30、penetration into the material to be loaded but are detrimental in abrasive material due to reduced cutting edge wear life. As a result, the subcommittee agreed that the blunts specified should provide amends for both a reasonable ease of penetration and wear life. Thus, for all sections through 35 m
31、m thick: The closest metric dimension to 20% of the section thickness was used. For all section thicknesses in excess of 35 mm: 30% of the section thickness was used. The proportionally larger blunts suggested on sections thicker than 35 mm is justified in that the thicker cutting edge sections are
32、used on the larger machines with more drawbar per linear inch of cutting edge length. Thus, local failure or deformation of the cutting edge due to high compressive stresses can be avoided. Various cutting edge bevel angles were found to exist on all thickness edges. The most common were: 22 37, 25,
33、 30, and 35. Rolled sections with bevel angles of 22 37 and 25 were predominate for cutting edges 35 mm and less in thickness. Flame cut edges with bevel angles of 30 and 35 comprised most of the cutting edges larger than 35 mm thick. An effort was made to determine the most ideal bevel angle for lo
34、ader cutting edges. The conclusion was that there was no real engineering justification for any particular bevel angle within the range found to exist. Outside of the existent range, bevel angles of considerably less than 22 37 would result in reduced wear life while those considerably greater than
35、35 would increase penetration resistance into the material to be loaded. As a result, it was decided to recommend bevel angles based on accommodating the largest number of existing bucket teeth and mill rolls. For cutting edge sections of 35 mm and less, the recommended bevel angle is 23 . The curre
36、nt highest usage edges in this category are rolled sections with a 22 37 bevel angle. Utilization of metric plate sizes for thickness dictates that some new mill rolls will have to be created regardless of the bevel angle. For some metric plate thicknesses, existing mill rolls can be modified provid
37、ing the bevel angle is not changed. The bevel angle tolerance achieved with mill rolls is 1/2 . For a new document where changes are already dictated by using metric plate sizes, it is not feasible to recommend an angle that isnt a whole integer measured in degrees. Therefore, 23 was selected which
38、is still within the bevel angle tolerance zone for the 22 37 mill rolls. This will minimize the number of new mill rolls required and allow for others to be modified. Bucket teeth manufactured to fit on 22 37 bevels can still be used on 23 bevel edges providing the metric section thickness allows fo
39、r interchangeability. A bevel angle of 30 was selected for edges greater than 35 mm thick. The majority of these cutting edges in existence had 30 bevels and were flame cut. Using a 30 bevel angle will, thus, allow for continued usage of the maximum number of bucket teeth in existence providing the
40、section thickness allows interchangeability. Tolerances for all dimensions were determined relative to the manufacturing processes involved, metric plate tolerances, and requirements dictated by usage of bucket teeth. Overall, this document should provide an excellent bench mark from which future st
41、andardization of loader cutting edge sections and bucket teeth can be achieved. Since many of these recommendations are arbitrary in nature, it is expected that modifications, deletions, and additions to this document will come about with future feedback and experience. Relationship of SAE Standard
42、to ISO StandardNot applicable. SAE J1303 Issued FEB85 ApplicationFor cutting edges used on buckets for loaders defined in SAE J1057a. The dimensions are applicable to rolled, cast, forged, flame cut, and machined cutting edge sections. Straight cutting edges are defined as those whose leading edge a
43、nd rear edge are parallel and, thus, are of constant cross section. For “Straight Cutting Edge Sections with Bolt Holes,“ see SAE J1304 FEB85. NOTEFor some heavy-duty applications, cross sections with larger blunts and greater bevel angles may be required. Reference Section SAE J731dComponent Nomenclature SAE J1057aIdentification Terminology of Earthmoving Machines SAE J1304 FEB85Cutting Edge - Cross Sections Loader Straight with Bolt Holes Developed by the SAE Off-Road Machinery Technical Committee