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7、/standards/J826/1_201106 SURFACE VEHICLE RECOMMENDED PRACTICE J826-1 JUN2011 Issued 2011-06 CAD Model for SAE J826 3-D H-Point Machine RATIONALE CAD surface data for the outer shell of the cushion and back pans of the SAE J826 3-D H-point machine (HPM-1) has recently been developed by the SAE HADD C
8、ommittee. Previously, documentation describing the production SAE J826 HPM was contained in a series of 2-D dimensional layout drawings from 1974, the final assembly fixturing jig, and in other minor build and SAE J826 revisions made over the years. 1. SCOPE This document describes the CAD model dat
9、a available from SAE for the HPM-1 three-dimensional H-point machine. The elements of the CAD model include the outer surfaces of the cushion and back pans, datum points and lines, and calibration references. The intended purpose for this information is to provide a CAD reference for design and benc
10、hmarking as well as a calibration reference for the physical HPM-1 audits. The content and format of the data files that are available are also described. 2. REFERENCES 2.1 Applicable Documents The following publications form a part of this specification to the extent specified herein. Unless otherw
11、ise indicated, the latest issue of SAE publications shall apply. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. SAE J826 Devices for Use in Defining and
12、Measuring Vehicle Seating Accommodation SAE J1100 Motor Vehicle Dimensions 3. DEFINITIONS Terms and dimensions used in this document are defined in SAE J826 and in SAE J1100. SAE J826-1 Issued JUN2011 Page 2 of 6 4. CAD DATA FOR HPM-1 4.1 Description The HPM-1 is described in detail in SAE J826, inc
13、luding the installation and calibration procedures. The CAD model of HPM-1 described in this document contains the following elements (see Figure 1): HPM Pan surfaces Surface data for the back pan outer surface Surface data for the cushion pan outer surface Datum Points and lines H-point H-point lin
14、e Knee line Thigh (Cushion) line1 Thigh (Cushion) angle land Torso line Torso weight hanger bar line Calibration References Calibration rod for cushion pan Calibration rods (2) for back pan The thigh (cushion) angle land, which is a triangular-shaped flat area between the legs, represents the top su
15、rface of the metal plate that is mounted on the inner fiberglass surface between the legs of the HPM. This is the only inner HPM surface that is part of the CAD model. 1For the SAE J826 HPM-1 the cushion line is identical to the thigh line when the HPM-1 leg/shoe is attached. In this case the cushio
16、n angle (A27) is identical to the thigh angle (A57). SAE J826-1 Issued JUN2011 Page 3 of 6 FIGURE 1 - PERSPECTIVE VIEW OF 3-D HPM-1 CAD MODEL OF CUSHION AND BACK PANS 4.2 Posturing the CAD Model Three parameters are needed to posture the HPM CAD model in a vehicle seat: a known seat H-point location
17、, torso angle, and cushion angle (or thigh angle). These parameters can be determined from a physical installation of the 3-D HPM in a designated seat position, or from manufacturer specifications (see Figure 2). Position the H-point of the CAD model at an H-point location in the H-point travel path
18、 of the seat. (Typically, this is the manufacturer SgRP location.) The torso and thigh (cushion) lines are positioned in the Y-centerplane of the designated seating position. The pans of the HPM CAD model pivot about the H-point line. To orient the back pan, set the model torso line to the design to
19、rso angle, A40. To orient the cushion pan, set the model thigh (cushion) line to the thigh angle, A57 (or cushion angle, A27). SAE J826-1 Issued JUN2011 Page 4 of 6 FIGURE 2 - 3-D HPM-1 CAD MODEL PARAMETERS 4.3 Key Dimensions of the CAD HPM Some key length and width dimensions for the CAD model are
20、shown in Figure 3 and given in Table 1 and Table 2, respectively, to the nearest hundredth of a mm. All dimensions in this section are provided in the default reference posture: thigh line horizontal (thigh angle = 0 degree) and torso line vertical (torso angle = 0 degree). FIGURE 3 - REFERENCE POST
21、URE AND KEY DIMENSIONS OF THE HPM-1 CAD MODEL SAE J826-1 Issued JUN2011 Page 5 of 6 TABLE 1 - CUSHION PAN LENGTHS, HEIGHTS, AND WIDTHS (mm) Description Value H-point to front center of pan, x 406.40 H-point to rear of pan, x (in H-point Z-plane) 134.10 H-point to rearmost pan surface, x 134.40 H-poi
22、nt to center of 25 mm diameter thigh support calibration rod, x 263.83 H-point to pan at tangent to 25 mm diameter thigh support calibration rod, z 72.60 H-point to bottom of pan, z 97.60 Pan width at H-point, y 381.00 TABLE 2 - BACK PAN LENGTHS, HEIGHTS, AND WIDTHS (mm) Description Value H-Point to
23、 rearmost back pan surface, x 134.40 H-point to pan at tangent to upper back pan calibration rod, x 134.40 H-point to center of upper back pan calibration rod, z 250.00 H-point to pan at tangent to lower back pan calibration rod, x 134.40 H-point to center of lower back pan calibration rod, z 185.50
24、 H-point to torso weight hanger bar centerline, z 356.40 H-point to top of pan, z 546.10 Pan height from bottom to top, z at center 488.00 Maximum width, y 388.00 4.3.1 CAD Tolerances of Key Dimensions Dimensional variation may occur when importing and exporting the HPM CAD data to and from various
25、software programs. To represent the intended shape and size of the HPM, it is expected that variation at the key dimensions be less than 0.01 mm. 4.4 CAD Data Formats The CAD model is available in the following formats: CATIA v4 (without parametrics) CATIA v5 (without parametrics) IGES STEP SAE J826
26、-1 Issued JUN2011 Page 6 of 6 The CAD model in each format is provided as three separate files as follows: 1. Cushion pan (with thigh line, knee line and H-point line), 2. Back pan (with torso line, torso weight hanger line and H-point line) 3. Calibration rods (with H-point line) The three separate
27、 files can be merged into one part by aligning the H-point lines. The calibration rods are only used in the reference posture. 4.5 Model Availability The HPM-1 CAD model is certified by SAE and is available from the SAE online store (http:/store.sae.org/ea/ or http:/standards.sae.org/ or from: SAE I
28、nternational 400 Commonwealth Drive Warrendale, PA 15096-0001 5. NOTES 5.1 Marginal Indicia A change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this document. An (R)
29、 symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY THE SAE HUMAN ACCOMMODATION AND DESIGN DEVICES STANDARDS COMMITTEE
