CA2034794A1 - Circular sawing apparatus with adjustable saw guides - Google Patents

Circular sawing apparatus with adjustable saw guides

Info

Publication number
CA2034794A1
CA2034794A1 CA 2034794 CA2034794A CA2034794A1 CA 2034794 A1 CA2034794 A1 CA 2034794A1 CA 2034794 CA2034794 CA 2034794 CA 2034794 A CA2034794 A CA 2034794A CA 2034794 A1 CA2034794 A1 CA 2034794A1
Authority
CA
Canada
Prior art keywords
arbor
saw
guide
module
assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
CA 2034794
Other languages
French (fr)
Inventor
Daniel E. Erickson
William J. Phillips
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Coe Manufacturing Co
Original Assignee
MAINLAND MANUFACTURING A MEMBER OF BOVAR GROUP
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MAINLAND MANUFACTURING A MEMBER OF BOVAR GROUP filed Critical MAINLAND MANUFACTURING A MEMBER OF BOVAR GROUP
Priority to CA 2034794 priority Critical patent/CA2034794A1/en
Publication of CA2034794A1 publication Critical patent/CA2034794A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23DPLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D47/00Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
    • B23D47/005Vibration-damping
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27BSAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B7/00Sawing machines working with circular saw blades, specially designed for length sawing of trunks
    • B27B7/04Sawing machines working with circular saw blades, specially designed for length sawing of trunks by making use of a plurality of circular saws mounted on a single spindle; Arrangements for adjusting the mutual distances

Abstract

ABSTRACT OF THE DISCLOSURE
A circular saw apparatus. A pair of arbors each carrying a plurality of saws and a set of saw guides for each arbor. The arbors are mounted for relative movement and the saw guides associated with the movable arbor are carried with the arbor to allow for movement therewith. The arbors are mounted in a module and a like module may be carried on the opposite side of the centre line of the cant or log intended to be cut with the saws.
SPECS/MA17780.04

Description

~3~ ~f~
L _ CIRCULAR SAWING APPARATUS WITH ADJUSTABLE SAW GUIDES

INTRODUCTION

This inventio~ relates to a circular saw apparatus and, more particularly, to a circular saw apparatus utilizing an adjustable arbor with saw guides for guiding the circular saws.

BACKGROUND OF THEINVENTION

The use of circular saws in the lumber and logging industry is, of course, well known. Such saws are utilized for expediently cutting logs into cants and boards and typically are mounted such that the log or cant will enter the saw parallel to the plane of the saw and, thereafter, cut into boards and cants as desired.

A disadvantage when using unguided circular saws is that the thickness o-f the blade must necessarily be increased to reduce oscillation of the blade. If the blade oscillates, the kerf or width of the cut is increased. If the thickness of the saw blade is increased, the oscillation will be reduced but the kerE
will be at a maximum value. This value, however, can be substantially greater than that in a guided saw.

It is possible to utilize saw guides with circular saws in order to reduce the oscillation o~ the blade and, thereby, to allow the use of larger saws with minimum thicknesses to reduce. the kerf width. The use of such saw guides, however, is difficult when the saw diameters are varied since the saw guides must also be changed.

It is advantageous to use smaller or larger diameter circular saws with differen-~ size logs and cants.
This is so since the kerf is desirably made as small as possible depending on the size of the log or cant. It is desirable, therefore, to provide adjustment between the arbors on a double arbor saw to allow the replacement of saw blades and dif~erent diameter saw to thereby allow the minimum kerf necessary to be used to cut the log or cant.
SVMMARY OF THE PRESENT_INVENTION

According to one aspect of the invention, there is provided a circular saw apparatus comprising a first arbor assembly moun-ted in a module, a first circular saw mounted in said first arbor assembly, a first arbor mounted in said first arbor assembly, a first saw guide mounted in said first arbor assembly, said arbor assembly -; being mounted for movement parallel to the plane of said saw.

According to a further aspect of the invention, there is provided a saw guide adjustment apparatus comprising a cassette assembly mounted within a module, a guide mount sleeve within said cassette assembly, saw guides mounted on said guide mount sleeve and means to simultaneously move said guide mount sleeve and said saw guides relative to said cassette assembly.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

An embocliment o~ the invention will now be described, by way of example only, with the use of drawings in which:
2 ~ 3 l~ ,J ~ ~

Figures lA and lB are side and plan diagrammatic views, respectively~ of the circular sawing : apparatus incorporating the inYentiOn;

Figures 2A and 2B are enlarged side and end views, respectively, particularly illustrating the saw box of the circular sawing apparatus o~ Figure l;

Figures 3A and 3B are end and side views, respectively, o~ the cassette for the top or upper arbor of the saw box;

Figures 4A and 4B are sectional end views of the saw guides and bottom arbor according to the invention;
Figures 5A and 5B are side and plan views, respectively, of a typical saw guide according to the invention;

Figure 6 is a diagrammatic representation o~ the installed and operating positions of the saw guides as used with different diameter circular saws Eigure 7 is a diagrammatic end view of the arbor with the circular saws inskalled thereon and a quick change sheave mounted on one end of the arbor;

Figures 8A and 8B are side and bottom views, respectively, o~` the movable arbor assembly;
Figure 9 is a sectional view of the mounting of the lower arbor within the saw box module;

Figures lOA and lOB are end and side views, respectively, of the arbor cassette and saw guide sleeve;

~ ~ 3 i~

Figures llA and llB are side and end views, respectively, of the arbor sleeve;

Figure 12 is a diagrammatic side view of the saw guide adjustment apparatus according to the invention; and Figure 13 is a view similar to Figure 2 but illustrating a variation in the Figure 2 embodiment.

DESCRIPTION OF SPECIFIC EMBODIMENT

Reference is now made to the drawings and, more particularly, to Figure lA where a circular saw apparatus is illustrated generally at 10. It comprises an in feed section generally illustrated at 11 which includes a sharp chain 12 carrying the log or cant 13 (Figure 7), a saw box generally illustrated at 14 and an out feed section generally illustrated at 20 which includes side press rolls 21.
A butterfly chain 22 is mounted between butterfly chain drums 23, 24 and is adjustable by air cylinders 30, 31. The butterfly chain 22 is used to assist the log 13 to travel on the sharp chain 12. The weight of the butterfly chain 22 also is used to push the log 13 down onto the sharp chain 12 to provide more integrity for the transportation of the log or cant 13 on the sharp chain 12 to the saw box 14.

. 30 The saw box 14 comprises two modules 32 (Figure ; lB). It will be understood that each of these modules 32 : are symmetrical about the centre line 33 (Figure 2B) and, accordingly, only one module 32 will be described in detail.

2 0 3 ~
: - 5 The modules 32 are mounted on chrome ways 34 as seen more clearly in Figure 2B and are movable inwardly and outwardly in the direction l'D'I indicated in Figure 2B
relative to the centre line 33 o~ the saw apparatus 14 by the use of cylinders as leadscrews (not illustrated) connected to each of the modules 32 and operated manually externally of the modules 32 to obtain the desired operating position for each module and, accordingly, the circular saws generally illustrated at 35.

Each of the modules 32 has double or two arbors, top arbor 40 and bottom arbor 41. Top arbor 40 is movable in the direction "A" indicated in Figure 2A and is carried in arbor supports 50 (Figure 8A) which are each movable on arbor guides 51, 52 connected to the ~orward frame 53 of module 32 o~ saw box 14. An adjustment screw drive 54 is connected to an adjustment screw 60 which rotates within an adjustment nut 61 which is mountad to the arbor support 50 and which provides for such arbor movement.
The top arbor 40 is mounted within a top arbor cassette generally illustrated at 62 (Figure 3). The top arbor cassette 62 comprises a tube 63 about which is mounted a collar 64 and a plate 70. Collar 64 is mounted directly to the top arbor support 50 (Figure 8B) and plate 70 is located outside the inner wall 71 similar to that shown in Figure 9 of the module 35 but is not attached thereto. A movable outer wall plate (not shown) .is mounted outside the inner wall 71 oE the module 35 and the plate 70 is connected to the movable outer wall plate to allow for movement o~ the top arbor 40.

The bottom arbor 41 is mounted within a bottom arbor cassette 74 which is identical to top arbor cassette 62 save that the collar 64 is not present. The bottom arbor cassette 74 is not movable and, therefore, it is 2~3~

connected directly to the inner wall 71 o~ the module 35 by cap screws 80 as seen more clearly in Figures 4B and 9.

Bottom arbor 41 is mounted within two bearings 72, 73 inside the bottom arbor cassette 74. l'he arbor 41 ext~nds outwardly o-f the bottom arbor cassette 74 and terminates in a spline 81. An arbor sleeve 82 is mounted on the spl.ine 81 and, it in turn, has a splined periphery 83 as also seen more clearly in Figure 11. The circular saws 35 are mounted to the arbor sleeve 82 as will be described in greater detail hereafter.

An arbor cap 84 is mounted to the arbor 41 by cap screw 90 and retains the arbor sleeve 82 on the spline 81.

The bottom arbor cassette 74 includes, as described, a plate 70 which extends parallel to and yenerally upstream oE the direction of movement of the loy 13. A hole 91 is drilled in the outwardly extending arm of the arbor cassette 74 (Fiyure 3A) and the inner wall 71 of the module 32. A yuide clamping cylinder 100 extends throuyh and is movable relative to the inner wall 71 and the arbor cassette 74. A guide mount sleeve 92 (Figure lOB) is mounted to the arbor cassette 74 and has flats (not shown) mounting the saw guides 102. A guide clampiny head 9~ is connected to and moves with the yuide clampiny cylinder 100. The guide clamping cylinder 100 and the guide clamping head 94 will move relative to the 30 guide mount sleeve 92 and gallery block 101 to exert pressure on the saw guides 102 (Fiyures 5 and 6) in a manner as will be described in greater detail hereafter thereby to hold them in a precise position on guide mount sleeve 92. A T-bar 11 is mounted to the arbor cassette 74 outwardly o~ the guide mount sleeve 92 and serves to stop s~

the rotation of the saw guides 102 which abut the T-bar 111 as described further hereafter.

A typical saw guide 102 is generally illustrated in Figure 5. A hole 103 is drilled in one end and has an opening 104 on one side. The saw guide 102 is mounted to the guide mount sleeve 92 (Figure lOB) by way of the opening 104 which fits over the flats (nok shown) machined on the guide mount sleeve 92. Followin~ the mounting of the saw guide 102 on the guide mount sleeve 92, the saw guide 102 is rotated until the extension 110 contacts the T-bar 111 (Figure lOB) which then prevents the saw guide 102 from rotating further as diagrammatically illustrated in Figures 4A and 6.
Babbitts 112 (Figure 4A) are removably mounted to both sides of the saw guide 102. The babbitts 112 are usad to guide and re.tain the circular saws 35 on the arbor sleeve 82 in the position desired. The babbitts 112 depend on the size of the circular saws 35 being used for a particular application. The mounting of the saw guides 102 will be described in greater detail hereafter.

A pair of eleGtric motors 113, 114 are used with each module 32 (Figure 2A). Motor 113 is connected to and drives top arbor 40 as shown more clearly in Figure 7 via a belt drive 120 which is connected to quic]c change sheave 122 mounted on arbor 40. Likewise, electric motor 114 is connected to and drives bottom arbor 41 via a belt drive 121 which is connected to quick chang~ sheave 123 mounted to the bottom arbor 41. The use of the quick change sheaves 121, 123 allow for a variable rotation rate of the circular saws 35 relative to the rate of rotation of the motors 113, 114.

2 ~
, g ..
OPERATION

In operation, it will initially be assumed that three circular saws 35 are intended to be used on each of the top and bottom arbors 40, 41, as seen in Figures 2B
and 4Ao With re~erence to Figure 4A, four saw guides 102 will be required, the inside saw guide 102 or the one closest to the sharp chain 12 will have only one babbitt 112 on its outer face. The outside saw guide 102 will also have only one babbitt 112 but it will be mounted on its inner face. The two inner saw guides 102 will have babbitts 112 mounted on both sides.

Inside saw guides 102 will be mounted by fitting the opening 104 (Figure 5A) over the flats on the guide mount sleeve 92 as seen in Figure 6 and will be rotated clockwise until the extension 110 contacts the T-bar 111.
First circular saw 35 is then mounted on the splined periphery 83 of arbor sleeve 82 (Figure llB) until it is in loose contact with the inside saw guide 102. Inner saw guide 102 will then be mounted to the guide mount sleeve 92 in a similar manner followed by the mounting of a urther circular saw 35. The process continues until the ; last and outside saw guide 102 is mounted over the guide mount sleeve 92 and rotated into its operating position.

The guide clamping cylinder 100 (Figure 10B) will then be activated which will exert a pull inwardly on guide clamping head 94. This will move the saw guides 102 into tight and precise contact with the result that the circular saws 35 on arbor sleeve 82 will be under the precise control of the babbitts 112 o~ the saw yuides 102.

A similar process, of course, is followed for each of the three remaining arbor cassettes 62 until all :

2~3l~JL~
_ g _ the circular saws 35 and the saw guides 102 are mounted for operation.

The top and bottom arbors 40, 41 may move relative to one another as seen in Figure 2A. In the configuration described, top arbor 40 is movable with arbor cassette 62 and, therefore, its respective saw guides 102, relative to bottom arbor 41 and its corresponding arbor cassette and saw guides 102. The movement of arbor 40 is achieved by moving the arbor supports 50 (Figure 8A) with the use of the adjustment screw drive 54 such that the top arbor 40 moves in the directions indicated by the arrow "A'l in Figure 2~. Thus, circular saws 35 of varying sizes may be used with the double arbor assemblies described and illustrated.

In the event a different rotational speed of the circular saws 35 is required, the quick change sheaves 121 may be replaced with sheaves of a different diameter thereby to increase or decrease the rotation of the arbors 40, 41 and the respective circular saws 35 mounted thereon. The motors 113, 114 are adjustably mounted on the frame of the circular saw apparatus 10, thereby to maintain the belts in the desired tension for efficient drive.

With reference to Figure 2B, it will be seen that the modules 32 can be moved inwardly and outwardly with respect to the centre line 33 of the circular saw apparatus 10. Thus, the position of the circular saws 35 and saw guides 102 may also be adjusted relative to the distance o~ the log or cant 13 being carried on the sharp chain 12 and entering the saw box 14.

With reference to Figure 4A, it will be noted that the inside or most close to centre line 33 saw guide ~ ~ 3 ~ ~ ~ J

102 is mounted with its babbitt 112 such that it is directly beneath the shoulder of the sharp chain 12 which is carrying tha log or cant 13. This is advantageous since support for the pieces or boards being cut from the log or cant 13 is provided which is desirable to enhance the precision o~ the cut made by the circular saws 35.
Likewise, it will be seen that the arbor cap 84 viewed in Figure 4B and connected to arbor sleeve 82 serves a similar function.

It will be further seen that the saw guides 102 may be moved relative to the respective arbor and cassette to which they are mounted by the movement of the saw guides 102 and circular saws 35 on the splined periphery of the arbor sleeve 82. It will also be noted that the circular saws 35 and saw guides 102 may move with their respective arbor 41 and that this movement may take place ; relative to the respective cassettes within which they are mounted .
Yet a further embodiment o~ the invention is illustrated in Figure 12. This embodiment is useful when it is desired to adjust the position of the top saws 35 relative to the bottom saws 35 with the sawguides 102 "on the fly" which thereby obviates the need for movement of the entire module 32 of the circular saw apparatus 10.

Re~erring to Figures lOB and 12, the saw guides 102 (not shown) are mounted to the guide mount sleeve 92 and are tightly clamped in the normal fashion by tightening guide clamping head 94 with the hydraulic guide clamping cylinder 103 and thereby tightly maintaining the saw guides 102 against gallery block 101. This entraps :~ the saws 35 between the guides. In the Figure 12 embodiment, however, male member or micro adjustment member 103 has a threaded outer periphery 104 and remains r~

~ 11 ~

stationary with the arbor cassette 74. Collar or micro adjuster nut 108 has internal threads 106 which are complementary to the threads on male member 103. Collar 108 rotates and moves laterally along memb2r 103 and mating collar or gallery block fork ring 107 moves laterally with collax 108 together with gallery block 101 inwardly and outwardly relative to the arbor cassette 74 and male member 103 depending on the direction of rotation of collar 108 relative to male member 103. By rotating collar 108, therefore, the saw guides 102 will move inwardly and outwardly on guide mount sleeve 92 and independent of the arbor cassette 74. Of course, it would be quite possible to maintain the topsaws stationary and have the lower saws relative to the guide mount sleeve so as to adjust the position of the top circular saws 102 relative to the bottom circular saws without the need -for moving the entire module 32.

Many modifications will readily occur to those skilled in the art to which the invention relates and the specific embodiments described should be taken as illustrative of the invention only and not as limiting its scope as defined in accordance with the accompanying claims.

Claims (11)

1. Circular saw apparatus comprising a first arbor assembly mounted in a module, a first circular saw mounted in said first arbor assembly, a first arbor mounted in said first arbor assembly, a first saw guide mounted in said first arbor assembly, said arbor assembly being mounted for movement parallel to the plane of said saw.
2. Circular saw apparatus as in claim 1 and further comprising a second arbor assembly mounted in said module, a second circular saw mounted in said second arbor assembly, a second arbor and a second saw guide mounted in said second arbor assembly, said second arbor assembly being movable relative to said first arbor assembly and said module.
3. Circular saw apparatus as in claim 2 wherein said saw guides and said arbor in said second arbor assembly move simultaneously.
4. Circular saw apparatus as in claim 3 wherein said first module is movable in a direction perpendicular to the plane of said circular saw.
5. Circular saw apparatus as in claim 1 wherein said first and second arbor assemblies are mounted in a first module, said first arbor assembly being mounted above said second arbor assembly, said first arbor assembly being movable relative to said module and said second arbor assembly being fixed relative to said module.
6. Circular saw apparatus as in claim 5 and further comprising third and fourth arbor assemblies mounted in a second module, said third arbor assembly being movable relative to the said module and said fourth arbor assembly being fixed relative to said module.
7. Circular saw apparatus as in claim 6 wherein said third arbor assembly is mounted above said fourth arbor assembly.
8. Saw guide adjustment apparatus comprising a cassette assembly mounted within a module, a guide mount sleeve within said cassette assembly, saw guides mounted on said guide mount sleeve and means to simultaneously move said guide mount sleeve and said saw guides relative to said cassette assembly.
9. Saw guide adjustment apparatus as in claim 8 wherein said saw guides are mounted on said guide mount sleeve between a guide clamping head and a galley block.
10. Saw guide adjustment apparatus as in claim 9 wherein said galley block is moved relative to said cassette assembly by a threaded connection between a male member and a collar mounted on said male member.
11. Saw guide adjustment apparatus wherein said guide clamping head in moved relative to said guide mount sleeve by a guide clamping cylinder.
CA 2034794 1991-01-23 1991-01-23 Circular sawing apparatus with adjustable saw guides Abandoned CA2034794A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA 2034794 CA2034794A1 (en) 1991-01-23 1991-01-23 Circular sawing apparatus with adjustable saw guides

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA 2034794 CA2034794A1 (en) 1991-01-23 1991-01-23 Circular sawing apparatus with adjustable saw guides

Publications (1)

Publication Number Publication Date
CA2034794A1 true CA2034794A1 (en) 1992-07-24

Family

ID=4146886

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2034794 Abandoned CA2034794A1 (en) 1991-01-23 1991-01-23 Circular sawing apparatus with adjustable saw guides

Country Status (1)

Country Link
CA (1) CA2034794A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5809859A (en) * 1995-12-15 1998-09-22 Newnes Machine Ltd. Threaded ring and nut variable target size sawguides for circular gang saws
US6929043B2 (en) 2001-07-24 2005-08-16 Valley Machine Works Ltd. Optimized board edger and method of operation thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5809859A (en) * 1995-12-15 1998-09-22 Newnes Machine Ltd. Threaded ring and nut variable target size sawguides for circular gang saws
US6929043B2 (en) 2001-07-24 2005-08-16 Valley Machine Works Ltd. Optimized board edger and method of operation thereof
US7543615B2 (en) 2001-07-24 2009-06-09 U.S. Natural Resources, Inc. Optimized board edger and method of operation thereof
US7571751B2 (en) 2001-07-24 2009-08-11 U.S. Natural Resources, Inc. Optimized board edger and method of operation thereof

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