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Metal Band Saw: Horizontal Saw on a Welded Steel Frame
Curtis Eccardt's horizontal power band saw (Emerson Electric, US 4,364,294, 1982), built from welded steel channel and tube instead of iron castings to cut its cost. The saw head swings down on trunnions over the bed; a hydraulic cylinder with a valve sets how fast it feeds, a spring counterbalances it, and a spring tensioner shows the blade tension on a scale. Two guides with rollers twist the blade's lower run 90° so its teeth face down into the work, and carbide inserts hold it there.
The patent gives no sizes, speeds or ratings; the welder and wrenches are ours. The picture: the patent's Fig. 1.
高级
4 days
说明
1
1
Weld the bed
Weld the bed
Stand two steel channels (9a, 9b) parallel, webs upright and flanges facing in, and weld gussets (15) between their webs. Bolt a bed plate (17) across the top flanges as the work surface. Ours: MIG welder, drill press for the bolt holes.
此步骤所需材料：
槽钢2 个
低碳钢板1 个
六角头螺栓 - 8.8 级1 个所需工具：
MIG 焊机
台钻
活动扳手2
2
Weld and bolt on the legs
Weld and bolt on the legs
Weld formed sheet-steel legs onto horizontal floor members to make front and rear leg weldments (19, 21), and bolt them under the bed.
此步骤所需材料：
钢板1 个
结构钢管1 个六角头螺栓 - 8.8 级1 个所需工具：
MIG 焊机活动扳手3
3
Weld the head
Weld the head
Weld a head post (25) of square or rectangular steel tube square to a head beam (27) of rectangular tube. Weld a bracket leg (29) down from the beam's outer end, and fix support plates at both ends (31, 33).
此步骤所需材料：
结构钢管1 个低碳钢板1 个所需工具：
MIG 焊机4
4
Fit the trunnions and align the pivot
Fit the trunnions and align the pivot
Fix a shaft through the head post with its ends out as trunnions (55a, 55b), in bushings in two bearing blocks (59a, 59b) bolted inside the channel webs. Each block has one close-fit bolt hole and three oversize ones: shift the blocks until the pivot is parallel to the bed plate, then torque the bolts. A set screw (67) takes out end play.
此步骤所需材料：
钢轴1 个
金属衬套2 个
轴承座2 个六角头螺栓 - 8.8 级8 个
凹端紧定螺钉1 个所需工具：
台钻
扭力扳手5
5
Mount motor, belt drive and gearbox
Mount motor, belt drive and gearbox
Mount the electric motor (37) on a plate (38) pivoted on the head beam, and couple it by a multi-speed belt and pulleys (41) to a gearbox (39). Fit the drive wheel (43) on the gearbox output shaft.
此步骤所需材料：
电动机1 个低碳钢板1 个
传动带1 个
滑轮1 个
齿轮箱1 个
带锯轮1 个所需工具：
活动扳手6
6
Build the idler tensioner
Build the idler tensioner
Weld an idler yoke (87) of rolled steel plate, pivot it on the head beam with a pin (89), and cantilever the idler axle from it with the idler wheel (45) on bearings (85). A threaded rod (91) pulls the yoke through a coil spring (93) held between compression plates and a U-bolt (97); a knob (99) turns the rod. An indicator (101) on the spring reads the tension on a scale (103).
此步骤所需材料：
低碳钢板1 个
钢销1 个钢轴1 个带锯轮1 个
滚珠轴承1 个
全螺纹杆1 个
Coil Spring1 个
U 形螺栓1 个
控制旋钮1 个所需工具：
MIG 焊机活动扳手7
7
Build the two blade guides
Build the two blade guides
In each guide channel (111) mount two guide rollers (115a, 115b) on ball bearings on eccentric bushings, one fixed and one adjusted to the blade thickness. Add a carbide thrust insert (133) on the blade's back edge and two carbide side inserts (137a fixed, 137b on a sprung swing bracket set by a bolt and knob). Clamp the guides on two bar tracks (107).
此步骤所需材料：
导向滚轮4 个滚珠轴承4 个
偏心衬套4 个
硬质合金镶块6 个Coil Spring2 个控制旋钮2 个结构钢管1 个所需工具：
活动扳手8
8
Fit the blade and set the tension
Fit the blade and set the tension
By hand, run the endless blade (47) round the drive and idler wheels and through both guides; the rollers twist its lower run about 90° so the teeth face down. Turn the tension knob until the scale shows the tension you want.
此步骤所需材料：
带锯条1 个9
9
Fit the feed cylinder and counterbalance
Fit the feed cylinder and counterbalance
Connect a hydraulic cylinder (71) between bed channel and head post above the trunnions, filled with oil and piped through tubing (75) to a control valve (73): the valve sets the feed rate and, closed, holds the head. Fit a coil spring (78) on a threaded linkage (79) between an end gusset and the head post below the trunnions, adjusted by a knob (80), to counterbalance the head.
此步骤所需材料：
液压缸1 个
液压油1 batch
液压管1 个
流量控制阀1 个Coil Spring1 个全螺纹杆1 个控制旋钮1 个所需工具：
活动扳手10
10
Bolt on the vice
Bolt on the vice
Bolt the quick-acting vice to the bed plate to clamp the work square under the blade.
此步骤所需材料：
机用虎钳1 个六角头螺栓 - 8.8 级1 个所需工具：
活动扳手材料
29- 2 个占位符
- 1 个占位符
- 11 个占位符
- 1 个占位符
- 1 个占位符
- 1 个占位符
- 2 个占位符
- 2 个占位符
- 1 个占位符
- 1 个占位符
- 1 个占位符
- 1 个占位符
- 1 个占位符
- 1 个占位符
- 1 个占位符
- 占位符
- 1 个占位符
- 4 个占位符
- 1 个占位符
- 占位符
- 4 个占位符
- 4 个占位符
- 6 个占位符
- 1 个占位符
- 1 个占位符
- 1 batch占位符
- 1 个占位符
- 1 个占位符
- 1 个占位符
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