CATIA V5

Model a four-cylinder engine crankshaft, piston and connecting rod assembly

Software: CATIA V5
Platform: Windows
Length: 5 h 26 min
Resolution: 1920 × 1080
Output: CATPART, CATPRODUCT

Samples play on a computer

5.4hours

8Kclicks

2Kkeys

Windows

Task

Model the reciprocating crank train of an inline four-cylinder engine as a set of solid parts in millimetres, then assemble them into a product. Work from the supplied dimensioned diagrams: diagram_01.png, diagram_01_sheet2.png to diagram_01_sheet6.png and their detail images.

Create six parts, each named after the component:

1. PISTON: outside diameter Ø85, overall height 90, domed crown of R120.

Three ring grooves, 4.3 wide, with a groove-root diameter of Ø79.
- Inner cavity Ø76, 85 deep from the open end.
- Ø33.8 transverse piston-pin bore, with skirt cut-outs 27 high at the pin bosses.
- Section A-A detail: R40 underside relief, R10 transitions, and widths of 38 and 50 across the pin bosses.

2. CONNECTING_ROD: small end of Ø45 outside with a Ø33.8 pin bore. Big-end half-bore of R27 / R36, rod width 38 at the big end, 201.2 between the pin and crankpin centres, and two Ø9 bolt holes at 76 centres.

3. CONNECTING_ROD_CAP: the mating half-bearing cap.

94 wide, 60 high and 38 thick.
- Half-bore R27 inside, R36 outside.
- R10 corner blends and 27.5 / 22.53 chamfer geometry.
- Two Ø9 bolt holes in R9 bosses at 76 centres.

4. CRANKSHAFT: a single shaft.

Ø32 nose, 80 long.
- Ø72 main journals, 38 long.
- Ø54 crankpins, 46 long, offset 44 from the shaft axis.
- Webs 15 thick with an R80 / R36 profile and a 33° taper.
- Rear flange Ø144, 10 thick, carrying 8 holes of Ø10 on a Ø100 bolt circle.

5. PISTON_PIN: a Ø33.8 pin, 82 long.

6. PISTON_RING: a flat ring, Ø85 outside and Ø79 inside, 4.3 thick.

Build a sub-product named MINI_ASSEMBLY for one cylinder. It holds one piston, three piston rings seated in the grooves, one piston pin through the piston and the rod small end, one connecting rod, and one connecting rod cap closed on the rod big end.

Build the top-level product 4_CYLINDER_ENGINE_ASSEMBLY. It contains the crankshaft and four MINI_ASSEMBLY instances, one per crankpin, so that the big ends sit concentric on the crankpins. The pistons stand at the staggered heights set by the crank throws, as shown in the front, top and isometric views at 1:5.

The bill of materials must resolve to:

PISTON ×4
CONNECTING ROD ×4
CRANKSHAFT ×1
CONNECTING ROD CAP ×4
PISTON RING ×12
PISTON PIN ×4

Save each part as its own CATPart and each product as a CATProduct.

ReferenceSheet 1, page 1

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Loading the drawing

Rubrics18

R1
The model shall include a PISTON part with outside diameter 85 and overall height 90.
R2
The PISTON shall have three ring grooves 4.3 wide with a root diameter of 79.
R3
The PISTON shall have a transverse pin bore of diameter 33.8 and an internal cavity of diameter 76.
R4
The PISTON crown shall be domed with radius 120.
R5
The model shall include a CRANKSHAFT part with a rear flange of diameter 144 and thickness 10.
R6
The CRANKSHAFT flange shall carry 8 holes of diameter 10 on a 100 diameter bolt circle.
R7
The CRANKSHAFT shall have main journals of diameter 72 and a front nose of diameter 32 and length 80.
R8
The CRANKSHAFT shall have four crankpins of diameter 54 offset 44 from the main axis, separated by webs 15 thick.
R9
The model shall include a CONNECTING_ROD_CAP part 94 wide, 60 high and 38 thick, with a half-bore of radius 27.
R10
The CONNECTING_ROD_CAP shall have two bolt holes of diameter 9 at 76 centres.
R11
The model shall include a CONNECTING_ROD part whose small-end bore is diameter 33.8.
R12
The model shall include a PISTON_PIN part of diameter 33.8 and length 82.
R13
The model shall include a PISTON_RING part with outside diameter 85, inside diameter 79 and thickness 4.3.
R14
The model shall position each connecting rod big end concentric with a crankpin, with the cap closed around it.
R15
The model shall seat each piston pin through its piston and the connecting rod small end.
R16
The model shall contain a MINI_ASSEMBLY product grouping one piston, three piston rings, one piston pin, one connecting rod and one connecting rod cap.
R17
The model shall contain a top-level 4_CYLINDER_ENGINE_ASSEMBLY product holding one CRANKSHAFT and four MINI_ASSEMBLY instances.
R18
The model's product structure shall total 4 pistons, 4 connecting rods, 1 crankshaft, 4 connecting rod caps, 12 piston rings and 4 piston pins.

Gold output4_CYLINDER_ENGINE_ASSEMBLYCATPRODUCT

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00:00 / 5:25:30

Events27,549

00:01.921AppCATIA

00:24.833Move539, 448 → 543, 447

00:24.865Move544, 447 → 555, 451

00:24.897Move577, 463 → 1099, 570

00:25.666Click1099, 570

00:25.849Move1099, 572 → 1287, 584

00:51.338Move1285, 584 → 1907, 37

00:52.947Click1907, 37

00:53.099Move1907, 39 → 1902, 43

00:53.139Move1899, 46 → 1894, 52

00:53.174Move1862, 102 → 1855, 116

00:53.193Move1850, 129 → 1844, 143

00:53.218Move1818, 190 → 1805, 207

00:53.251Move1761, 248 → 1743, 261

00:53.266Move1719, 278 → 1696, 292

00:53.282Move1672, 307 → 1233, 349

00:53.482Move1201, 347 → 1188, 346

00:53.514Move1180, 345 → 1240, 324

00:53.626Move1250, 323 → 1262, 321

00:53.752Move1262, 321 → 757, 266

00:55.324Move760, 267 → 1225, 488

00:57.596Move1225, 488 → 1152, 510

01:32.000Move1919, 549 → 1919, 593

01:32.050Move1919, 596 → 1908, 608

01:32.082Move1894, 619 → 1256, 1053

01:34.147Move1255, 1052 → 1254, 941

01:34.978Move1254, 941 → 1508, 516

01:35.746Move1497, 514 → 1142, 282

02:07.933Move1548, 508 → 1547, 547

02:07.966Move1545, 563 → 1529, 652

02:07.998Move1527, 680 → 1277, 1064

02:09.270Move1277, 1064 → 1308, 935

02:09.958Move1312, 933 → 1383, 892

02:10.439Move1382, 891 → 1368, 897

02:10.727Move1364, 897 → 448, 41

02:12.319Click448, 41

02:12.478Move447, 40 → 488, 143

02:13.374Move489, 143 → 743, 165

02:14.494Click743, 165

02:14.582Move743, 165 → 877, 200

Loading events

Narration1,848

00:00
Opened CATIA V5 and displayed the Warm Start prompt asking whether to recover previous session data.
Start CATIA and handle session recovery.
00:20
Waited at the Warm Start prompt, then clicked the No button twice.
Decline recovery of the previous session.
00:25
Loaded CATIA and waited while Product1 was created; the window title changed to CATIA V5 - [Product1].
Open a new CATIA product document.
00:38
Displayed the Product1 workspace, then clicked the window controls near the upper-right; the view changed to a blank gray/loading area.
Continue initializing and adjust the CATIA window.
00:53
Returned to the CATIA V5 window and left the empty starry background visible while the application windows were resized or rearranged.
Maintain the CATIA workspace after window changes.
01:13
Remained idle in CATIA V5 with the empty starry background displayed.
Wait in the CATIA workspace.
01:33
Displayed CATIA V5 with an otherwise empty workspace and no visible document interaction.
Maintain the CATIA workspace while awaiting further interaction.
01:53
Remained idle in CATIA V5, then opened the Tools menu near the end of the interval.
Access CATIA tools.
02:12
Selected a command from Tools to open the Record macro dialog, then opened the Language used dropdown showing CATScript and MS VBScript options.
Configure a CATIA macro recording.
02:21
Returned to CATIA and interacted with the workspace while the application resized and loaded a document; a loading message appeared for MechMod.feat.
Load the CATIA document and restore the working view.
02:29
Waited while CATIA finished loading, leaving Part1 displayed with the standard planes and an empty PartBody.
Review the newly loaded CATIA part workspace.
02:49
Remained idle in the Part1 CATIA workspace with the standard planes and empty PartBody visible.
Keep the loaded part workspace open.
03:09
Remained idle in CATIA V5 with the empty Part1 workspace visible.
Wait without editing the part.
03:29
Remained idle in CATIA V5 while the empty Part1 workspace stayed visible; system display and connection state changed near the end of the interval.
Wait without editing the part.
03:49
Displayed CATIA V5 and resized a Windows Explorer window near the end of the interval.
Manage the visible application windows.
03:57
Unhid an application and resized a Windows Explorer window while CATIA V5 remained visible.
Manage the visible application windows.
04:09
Selected the YZ plane in CATIA, hid and restored the CATIA window, and resized it to a large workspace.
Prepare the CATIA workspace for sketching.
04:19
Clicked and dragged in the CATIA sketching area to place the first point of a profile; the live coordinates displayed approximately H 17.402 mm and V 45.323 mm.
Begin creating a sketch profile on the selected plane.
04:28
Clicked in the CATIA sketch area and continued positioning the active line endpoint, changing the preview from a horizontal segment to an upward vertical segment.
Create the next connected segment of the sketch.
04:41
Waited with the CATIA sketch unchanged while the active line endpoint remained positioned above the vertical segment.
Pause while continuing the sketch operation.
05:01
Clicked the active endpoint area, repositioning the line preview slightly while keeping the vertical segment and sketch constraints visible.
Adjust the endpoint of the current sketch line.
05:15
Clicked successively along the upper sketch area to extend the polyline with short connected segments and reposition the active endpoint.
Continue building the connected sketch profile.
05:26
Clicked the upper active endpoint and then clicked again to extend the next short segment of the stepped profile.
Continue adding connected geometry to the sketch.
05:33
Clicked the upper endpoint area, extending the active line preview upward and leaving the endpoint active with a red stop indicator.
Continue the sketch and prepare the next endpoint placement.
05:44
Selected and adjusted the active line endpoint, changing the displayed endpoint coordinates and angle in the CATIA sketch.
Refine the sketch line geometry.
05:51
Selected the line endpoint and created or adjusted a tangent arc, producing a curved segment attached near the upper part of the sketch.
Add a curved transition to the sketch.
06:01
Dragged the active sketch geometry to reshape the upper segment into a curved line, then left the PartBody geometry selected.
Refine the upper sketch profile.
06:09
Continued dragging and repositioning the sketch geometry, then opened the context menu for the selected circle and highlighted Hide/Show.
Modify and manage the visibility of sketch geometry.
06:19
Applied further geometry adjustments and selections, then selected sketch elements and displayed a length constraint along the lower horizontal segment.
Inspect or prepare to edit a sketch constraint.
06:35
Opened the Constraint Definition dialog, entered 85/2 and confirmed it, then returned to the sketch and zoomed or repositioned the view around the updated lower constraint.
Set the selected sketch constraint value and review the result.
06:48
Entered 90 in the Constraint Definition dialog and confirmed it, updating the sketch’s overall vertical constraint to 90; then manipulated the sketch view and selections.
Set the overall sketch height constraint.
06:59
Selected and manipulated PartBody/sketch geometry, panned or zoomed the view, and left the sketch displayed with the 90 vertical dimension.
Adjust the sketch view and select geometry for continued constraint editing.
07:09
Navigated the sketch and selected the upper geometry, leaving an upper offset constraint highlighted at approximately 15.094.
Choose the upper sketch constraint to edit.
07:23
Entered 11.6 in the Constraint Definition dialog and confirmed it, updating the selected upper offset constraint to 11.6.
Set the upper sketch offset dimension.
07:27
Paused with the updated CATIA sketch visible, then clicked the upper geometry to select it.
Review the updated constraint and prepare another geometry selection.
07:44
Selected additional sketch elements and initiated dimension selection, leaving two elements selected and intermediate dimensions around 9.103 and 11.378 visible.
Select geometry for another dimensional constraint.
07:58
Enter 7.3 in the Constraint Definition dialog and confirm it, updating the selected sketch dimension to 7.3 before continuing to select another constraint.
Adjust a sketch constraint value.
08:02
Enter 7.3 in successive Constraint Definition dialogs and confirm the edits, updating additional sketch dimensions while selecting constraints in the profile.
Apply repeated dimensional constraints to the sketch.
08:16
Enter 7.3 in a constraint dialog, confirm it, then select sketch geometry and dimension annotations to continue editing the profile.
Update a constraint and select geometry for further sketch editing.
08:27
Enter 7.3 in the constraint dialog, confirm it, and select multiple sketch elements; the displayed profile updates to show a 15.362 dimension.
Modify and inspect sketch constraints.
08:36
Enter 4.3 in the Constraint Definition dialog and confirm it, updating the selected sketch length and leaving the profile with a displayed 20.544 dimension.
Set another sketch dimension value.
08:41
Enter 4.3 in the constraint dialog and confirm it, then select the resulting 4.3 sketch dimension and perform additional view/geometry dragging and context interactions.
Finalize a sketch constraint and manipulate the sketch view or selection.
08:51
Dragged and clicked around the CATIA sketch, changing the view and selecting sketch elements while the constrained profile remained visible.
Adjust the sketch view and interact with constrained geometry.
09:01
Waited while the CATIA sketch remained unchanged on screen.
Review the constrained sketch.
09:21
Clicked sketch elements and adjusted the view, then selected geometry; a horizontal dimension of 24.72 became visible.
Select constrained geometry and inspect or modify its dimensional constraint.
09:41
Opened the Constraint Definition dialog, entered the expression 79/2, and confirmed it; the displayed horizontal dimension updated from 24.72 to 39.5.
Set the selected sketch constraint to a calculated value.
09:51
Navigated the sketch view with middle- and right-button clicks and drags, zooming and rotating around the constrained profile.
Inspect the updated sketch from different views.
10:01
Adjusted the sketch view again and opened the circle-tool flyout from the top toolbar, leaving the circle options visible.
Prepare to create circular geometry in the sketch.
10:11
Selected and adjusted the arc endpoint in the CATIA sketch, then clicked around the arc and geometry to finish the operation.
Modify the sketch arc endpoint and inspect the resulting geometry.
10:21
Selected the upper arc endpoint and positioned it, then clicked the sketch to complete the endpoint placement.
Define the arc endpoint location in the constrained sketch.

10:30
Selected sketch elements near the upper-right profile and clicked through the geometry, leaving the view zoomed toward the constrained arc and vertical profile.
Inspect or select constrained sketch elements for further editing.
10:40
Selected the PartBody and several sketch elements, dragged across the upper profile, and updated a visible constraint so the upper value changed to 11.853.
Edit a constraint associated with the upper sketch profile.
10:54
Opened the Constraint Definition dialog, entered 5, and confirmed it; then selected and reviewed the resulting constraint in the sketch.
Set the selected sketch constraint to a value of 5.
11:05
Selected the arc and nearby dimensional constraints, then adjusted the view and completed the selection so the arc turned green.
Inspect and confirm the modified constrained arc geometry.
11:14
Adjusted the CATIA sketch view and selected the curved upper profile, leaving the curve highlighted in white.
Inspect or select the upper sketch geometry.
11:24
Selected the curved profile and interacted with its dimension/constraint area, briefly highlighting the curve and displaying a radius value before invoking a delete context option.
Review or modify a sketch constraint or dimension.
11:34
Clicked and dragged around the constrained sketch geometry and dimension annotations, changing selections while keeping the profile and constraints visible.
Inspect and adjust sketch elements or constraints.
11:44
Selected the upper curved edge and nearby sketch area, leaving the curve highlighted orange and PartBody selected.
Select the upper profile for subsequent sketch operations.
11:53
Selected sketch geometry and used context or view interactions, temporarily highlighting the profile red, then returned to the normal constrained view while repositioning the sketch display.
Inspect or manipulate the sketch profile and its constraints.
12:04
Used middle- and right-button view interactions, then dragged across the upper curve and selected a sketch point, leaving the view repositioned and the point selected.
Reposition the sketch view and select a point on the upper profile.
12:14
Selected the upper curved profile element, leaving the arc highlighted and displaying its radius constraint as R 102.426.
Select and inspect the upper profile arc constraint.
12:25
Clicked and dragged around the upper profile, then selected the offset constraint near the top of the sketch; the constraint became highlighted with a value of approximately 2.8.
Select the upper offset constraint for editing or inspection.
12:43
Opened the Constraint Definition dialog for the upper offset, entered 5, and confirmed it; the sketch updated to show the new 5 offset.
Change the upper offset constraint value.
12:53
Selected the curved profile and its radius annotation, highlighting the arc and displaying R 102.426.
Select the profile radius constraint for editing.
13:09
Opened the radius Constraint Definition dialog, entered 85, and confirmed it; the profile radius changed to R 85.
Set the profile arc radius to 85.
13:14
Edited the selected radius constraint to 120 and confirmed it, then zoomed and panned the sketch to review the resized profile and surrounding dimensions.
Update the profile radius and inspect the resulting sketch.
13:24
Clicked around the CATIA sketch and manipulated the view, leaving the constrained profile visible with its dimensions and geometry unchanged.
Inspect or adjust the sketch view.
13:33
Navigated the sketch view, then switched CATIA workspaces and resized the window; the profile appeared as an orange 3D wireframe.
Transition from sketch editing to 3D feature creation.
13:44
Switched to the Shaft Definition window and activated the shaft preview, displaying a cylindrical revolved feature with the Shaft Definition dialog open and the first angle set to 360 degrees.
Define a revolved shaft from Sketch.1 around the Sketch Axis.
13:50
Confirmed the shaft operation and manipulated the 3D view, producing a shaded cylindrical part with several circumferential grooves; then selected PartBody and opened its context menu.
Create and inspect the revolved grooved solid.
14:09
Opened PartBody properties and reviewed the Graphic settings, including fill and edge appearance controls, without a clearly visible committed change.
Inspect or adjust the part display properties.
14:22
Closed the properties view and manipulated the model display, leaving the grooved cylindrical part highlighted in cyan in the 3D workspace.
Apply or review the part appearance and return to the model.
14:26
Switched to CATIA Part1, adjusted the model view with middle-button clicks, and selected the zx plane in the specification tree before the window briefly hid and reappeared.
Inspect and orient the CATIA part for subsequent modeling.
14:38
Resized and repositioned the CATIA window, leaving the cylindrical part displayed in a front-oriented view.
Set up a workable modeling view.
14:58
Adjusted the displayed model view with a middle-button interaction, slightly changing the cylinder’s on-screen orientation and position.
Refine the part view before creating geometry.
15:08
Adjusted the view, then activated the circle tool; CATIA displayed Start Point coordinate fields and prompted for the circle’s start point.
Begin creating a circle in the CATIA sketching environment.
15:16
Specified the circle endpoint, producing a large preview arc beneath the part, and selected PartBody in the tree.
Define a circular sketch element on the part.
15:27
Confirmed the arc interaction, adjusted the view with middle/right-button clicks, and dragged the view so the cylinder enlarged; CATIA then prompted to select 3D elements for projection onto the sketch plane.
Prepare to project existing part geometry into the sketch.
15:38
Adjusted the CATIA sketch view and used trimming/selection controls around the semicircular arc and its endpoints.
Refine the sketch geometry.
15:49
Selected the arc and related sketch elements, then activated the symmetry-line selection command and positioned the centerline through the arc.
Prepare the sketch for applying or editing geometric constraints.
16:03
Opened the Constraint Definition dialog for the arc radius, replaced the displayed radius value with 40, and returned to the sketch.
Set the arc radius constraint to 40 mm.
16:14
Selected and dragged the circular arc and adjusted the CATIA view, leaving the arc displayed with its R40 constraint.
Position or inspect the constrained arc in the sketch.
16:23
Selected the arc endpoint and adjusted the endpoint-related sketch geometry, producing a visible horizontal dimension of 14.575 on the right side.
Add or adjust the endpoint distance constraint.
16:32
Remained idle while viewing the CATIA sketch with the R40 radius and 14.575 horizontal dimension visible.
Review the completed sketch constraints.
16:52
Clicked near the lower-right edge of the CATIA sketch view with the middle and right mouse buttons; the displayed profile remained visible.
Interact with the sketch view, likely for view navigation or selection.
17:09
Clicked repeatedly around the sketch view and briefly interacted with the CATIA window controls, causing the application to hide, reappear, and resize; clicked the lower toolbar and then the upper-right area.
Adjust the CATIA workspace or view while working with the sketch.
17:19
Clicked twice near the upper-right portion of the sketch view with the middle mouse button; the view shifted slightly while retaining the same profile and dimensions.
Navigate or reposition the CATIA sketch view.
17:39
Paused with the CATIA sketch view unchanged.
Review or wait without making further edits.
17:59
Continued waiting with the same CATIA sketch displayed and no visible changes.
Review or remain idle in the CAD workspace.
18:19
Remained idle in CATIA while the existing sketch view stayed unchanged; the system briefly reported configuration, network, power, input, and memory-state changes before resuming.
Continue waiting in the CAD workspace without editing the model.
18:39
Remained inactive while viewing the CATIA sketch showing a curved profile and dimensional constraints.
Review the current sketch geometry.
18:59
Pressed repeated undo-like keyboard commands while CATIA resized or refreshed; the displayed sketch remained largely unchanged and the constraint annotations disappeared.
Modify or revert recent sketch changes.
19:09
Continued pressing undo-like commands, then activated the arc tool and clicked to define an arc endpoint; CATIA displayed live endpoint coordinates for the new arc.
Create or adjust an arc in the sketch.
19:17
Clicked and dragged in the sketch to place or adjust the arc, leaving a white curved segment and selecting PartBody.
Refine the arc geometry in the sketch.
19:27
Continued dragging and clicking to extend the sketch profile with a straight segment connected to the arc, while CATIA showed live endpoint coordinates and angle values.
Build the connected sketch outline.
19:37
Clicked and dragged to add another connected line from the profile, then adjusted the view; the sketch showed a closed-looking base-and-side outline with an arched top and a further slanted segment extending right.
Continue constructing and inspect the sketch profile.
19:47
Dragged across the sketch and clicked several geometry and constraint locations, leaving the profile visible with a selected line and constraint status.
Inspect or select sketch geometry and constraints.
19:57
Selected the lower sketch line and other geometry, using clicks and context clicks; displayed constraint annotations and a vertical dimension of about 24.107.
Review sketch dimensions and constraints.
20:08
Selected the sketch axis and then the upper profile edge, causing the corresponding geometry and dimension annotation to highlight.
Inspect additional sketch references and constraints.
20:18
Selected the curved profile and right-side geometry, then selected the vertical constraint; displayed the right-side dimension value 21.107.
Inspect the right-side sketch dimension.

Model the reciprocating crank train of an inline four-cylinder engine as a set of solid parts in millimetres, then assemble them into a product.

Create and document a detailed four-cylinder engine assembly in CATIA V5 by modeling its components, assembling and constraining them, applying materials, and producing annotated technical drawings and PDF exports for the piston, connecting rod, crankshaft, connecting rod cap, piston pin/ring, and overall assembly.