EP0202006A1 - Apparatus for the cutting of halving joints - Google Patents
Apparatus for the cutting of halving joints Download PDFInfo
- Publication number
- EP0202006A1 EP0202006A1 EP86302339A EP86302339A EP0202006A1 EP 0202006 A1 EP0202006 A1 EP 0202006A1 EP 86302339 A EP86302339 A EP 86302339A EP 86302339 A EP86302339 A EP 86302339A EP 0202006 A1 EP0202006 A1 EP 0202006A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bar
- cutting
- cutting means
- slots
- work table
- 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.)
- Withdrawn
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27F—DOVETAILED WORK; TENONS; SLOTTING MACHINES FOR WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES
- B27F1/00—Dovetailed work; Tenons; Making tongues or grooves; Groove- and- tongue jointed work; Finger- joints
Definitions
- the invention is concerned with improvements in or relating to bar cutting particularly to the joint cutting of window and door bars.
- the invention provides apparatus for the cutting of halving joints and the like comprising a machine frame including a work table, means to position a length of bar to be cut upon said table and means to present the work table and the bar to operating instrumentalities of the apparatus through relative movement therebetween, wherein said operating instrumentalities comprising a plurality of cutting means arranged at spaced locations along the work table and capable of simultaneously forming a plurality of cuts in the bar ; at selected intervals along the length thereof.
- each cutting means comprising three cutting wheels operating in a desired sequence, all the cutting means following the sequence in a simultaneous manner.
- provision may be made to reverse the direction of rotation of at least one of cutting wheels in order to preserve a clean cut into one or other surface of the bar as selected.
- means are provided for adjusting the spacing between the cutting means according to the required intervals of distance between the notches to be cut in the bar, depending on the design and size of the window or door panel frame to be manufactured.
- the work table is provided with slots formed along the path of operation of each cutting means when the table is presented thereto, and provision is made to adjust the position of said slots as required.
- each bar may be manually placed upon the work table and positioned thereon by clamps
- a supply device for example a hopper feed
- each bar is fed lengthwise beneath raised bar clamping devices until a movable end stop is reached.
- the end stop is removed, the clamps raised and the next bar is loaded.
- the advance of the next bar causes the preceding bar to be removed from the work table.
- Two wooden window bars 2,4 are illustrated in Figure 1. Each has a generally T-shaped cross-section and in order to form a cruciform joint has been notched for interengagement. Each bar has received three cuts, as shown on bar 4 at 6, 8 and 10 (see Figures 2 and 3).
- Figure 4 shows apparatus arranged for cutting four such notches simultaneously in a length of window bar 4.
- Notch cut 6 is to be made by a cutting wheel 12, notch cut 8 by a cutting wheel 14 and notch cut 10 by a saw blade 16.
- Four sets of the cutters 12, 14 and 16 are adjustably arranged along their driving spindles (not shown) to be driven by motors (not shown) having a total output of 12 Kw at a spindle speed of 6300 r.p.m.
- the paths of each set of cutters are shown in Figure 5 at A, B, C and D.
- the spacing between the paths of four sets of cutters 12, 14 and 16 is determined by the desired distance between the notches on the window bar 4. It will be understood that the numbers of cutters is also determined by the design of the window i.e. the number of bars 4 incorporated therein.
- the bar is supported upon a work table 18 of the apparatus which is arranged to be advanced toward the cutters 12, 14, 16.
- the portions of the bar to be notched lie across slots 20 in the table 18. While these slots may be simply milled into the table at suitable standard positions, it is particularly advantageous if the position of the slots may also be adjusted so as always to lie on the paths A-D, ( Figure 5).
- the leading edge of the table 18 is comprised by segments 22 received in a T-slot 24 of the table, the length and position of the segments being selected as required.
- each clamp 28 is capable of adjustment lengthwise of the table to accommodate the position of the segments 22.
- the clamps 28, which are pneumatically operated, are movable between a raised, retracted position and an extended lowered position illustrated in Figure 6.
- the operating position of the cutters may be adjusted in unison by a cam-operated adjustment means (not shown) so as to accommodate bars of various cross-sectional areas.
- the operating cycle of this apparatus is 12 seconds.
- a bar 4 is loaded thereon so as to be received in the groove 26 of the segments 22. These segments have been arranged to provide slots 20 on the paths A-D, and the four sets of cutters 12, 14 16 have been positioned so that the four notches to be formed are in the correct relative positions.
- the bar 4 is positioned against an end stop (not shown) to one side of the table as viewed in Figure 5.
- a safety cover 30 ( Figure 4) is then lowered and the operator must then simultaneously operate two start buttons 32 for safety reasons.
- the clamps 28 then advance and are lowered to clamp the bar 4 as shown in Figure 6.
- the work table 18 is then advanced as shown by the arrow E in Figure 6 until the portions of the bar 4 which bridge the slots 20 contact the wheels 12 and 14. Further advance of the table under the influence of an adjustable hydraulic damping valve arrangement thus results in the cuts 6 and 8 being formed and brings the bar into contact with the saw edge 16 to form the cut 10.
- the set and direction of rotation of the cutter teeth may be reversed if desired. This is because the edge cut on entry of the cutter or saw teeth is often cleaner than the exit edge and the appearance of one surface of the finished window may be visually more important as selected.
- the operation may be automated by providing a retractible end stop and supplying bars from a hopper feed means in an end-to-end loading sequency along the table. Whichever arrangement is selected, all the notches of any one bar are formed simultaneously.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Forests & Forestry (AREA)
- Dovetailed Work, And Nailing Machines And Stapling Machines For Wood (AREA)
Abstract
@ The invention is concerned with apparatus for cutting accurately profiled notches in wooden glazing bars (2,4) and the like. The apparatus illustrated by way of example comprises a machine frame including a work table (18), clamping means (28) to retain a bar in position on the table which is advanced towards a plurality of sets of cutting means (12,14,16) arranged at adjustably spaced locations along the table so that a plurality of cuts or notches (6,8) is formed simultaneously in the bar. Advantageously, a hopper feed arrangement may supply a sequence of bars in an end-to-end manner for operation by the apparatus.
Description
- The invention is concerned with improvements in or relating to bar cutting particularly to the joint cutting of window and door bars.
- In the production of windows, panelled doors and the like, it is conventional practice to manufacture bars or lengths of wood having a desired cross-section and to form notches in the bars to enable two lengths of bar to interengage and form a cruciform joint, hereinafter referred to as halving joint. Accurate cutting of these notches is necessary to enable for example a wooden window frame to be correctly assembled ready for glazing.
- The invention provides apparatus for the cutting of halving joints and the like comprising a machine frame including a work table, means to position a length of bar to be cut upon said table and means to present the work table and the bar to operating instrumentalities of the apparatus through relative movement therebetween, wherein said operating instrumentalities comprising a plurality of cutting means arranged at spaced locations along the work table and capable of simultaneously forming a plurality of cuts in the bar ; at selected intervals along the length thereof.
- Advantageously, each cutting means comprising three cutting wheels operating in a desired sequence, all the cutting means following the sequence in a simultaneous manner.
- In an example of apparatus according to the invention, provision may be made to reverse the direction of rotation of at least one of cutting wheels in order to preserve a clean cut into one or other surface of the bar as selected.
- Preferably, means are provided for adjusting the spacing between the cutting means according to the required intervals of distance between the notches to be cut in the bar, depending on the design and size of the window or door panel frame to be manufactured. Conveniently, the work table is provided with slots formed along the path of operation of each cutting means when the table is presented thereto, and provision is made to adjust the position of said slots as required.
- It will be understood that while each bar may be manually placed upon the work table and positioned thereon by clamps, it is also now made possible to load bars automatically onto the table from a supply device, for example a hopper feed, so that each bar is fed lengthwise beneath raised bar clamping devices until a movable end stop is reached. After cutting the notches in the clamped bar, the end stop is removed, the clamps raised and the next bar is loaded. Conveniently, the advance of the next bar causes the preceding bar to be removed from the work table.
- There will now be described with reference to the drawings example of an apparatus according to the invention. It will be understood that the description is given by way of example only and not by way of limitation.
- In the drawings;
- Figure 1 illustrates notches to be formed on a window bar
- Figure 2 is a side view of a notched bar
- Figure 3 is a cross-section on line III-III of Figure 2
- Figure 4 is a side view of the apparatus with covers partly removed to show the cutting means
- Figure 5 is a plan view of a work table of the apparatus; and
- Figure 6 is a side view of a bar clamped in position on the table of Figure 5.
- Two
wooden window bars 2,4 are illustrated in Figure 1. Each has a generally T-shaped cross-section and in order to form a cruciform joint has been notched for interengagement. Each bar has received three cuts, as shown on bar 4 at 6, 8 and 10 (see Figures 2 and 3). - Figure 4 shows apparatus arranged for cutting four such notches simultaneously in a length of window bar 4. Notch cut 6 is to be made by a
cutting wheel 12, notch cut 8 by acutting wheel 14 and notch cut 10 by asaw blade 16. Four sets of thecutters cutters - To obtain the greatest possible degree of support for the bar 4 during operation of the four sets of cutters the bar is supported upon a work table 18 of the apparatus which is arranged to be advanced toward the
cutters slots 20 in the table 18. While these slots may be simply milled into the table at suitable standard positions, it is particularly advantageous if the position of the slots may also be adjusted so as always to lie on the paths A-D, (Figure 5). In the present example therefore the leading edge of the table 18 is comprised bysegments 22 received in a T-slot 24 of the table, the length and position of the segments being selected as required. - In the example a locating
groove 26 of the table 18 is provided in eachsegment 22 so as to receive a shoulder portion of the cross-sectional area of the bar 4 (see Figure 6). The bar 4 is received beneathclamps 28 positioned at locations between neighbouringslots 20. Advantageously, eachclamp 28 is capable of adjustment lengthwise of the table to accommodate the position of thesegments 22. Theclamps 28, which are pneumatically operated, are movable between a raised, retracted position and an extended lowered position illustrated in Figure 6. In addition, the operating position of the cutters may be adjusted in unison by a cam-operated adjustment means (not shown) so as to accommodate bars of various cross-sectional areas. - The operation of the apparatus shown in the Figures will now be described. The operating cycle of this apparatus is 12 seconds.
- With the work table 18 in the position shown in Figure 6 and in full lines in Figure 4, a bar 4 is loaded thereon so as to be received in the
groove 26 of thesegments 22. These segments have been arranged to provideslots 20 on the paths A-D, and the four sets ofcutters start buttons 32 for safety reasons. - The
clamps 28 then advance and are lowered to clamp the bar 4 as shown in Figure 6. The work table 18 is then advanced as shown by the arrow E in Figure 6 until the portions of the bar 4 which bridge theslots 20 contact thewheels cuts saw edge 16 to form thecut 10. - It will be appreciated that the set and direction of rotation of the cutter teeth may be reversed if desired. This is because the edge cut on entry of the cutter or saw teeth is often cleaner than the exit edge and the appearance of one surface of the finished window may be visually more important as selected.
- Operation of a trip switch S1 by the advanced table causes the table to be withdrawn until a further trip switch S2 operates to halt the table in its original position and to release the
clamps 28. A mitring operation on the ends of the bar 4 renders it ready for assembly with others into a window frame. This is achieved by the additon to the device of so-called scribing heads (not shown) which shape the ends of the bars to be received in the peripheral frame of the window. - As mentioned above, the operation may be automated by providing a retractible end stop and supplying bars from a hopper feed means in an end-to-end loading sequency along the table. Whichever arrangement is selected, all the notches of any one bar are formed simultaneously.
- Various modifications may be made within the scope of the invention as defined in the following claims.
Claims (13)
1. Apparatus for the cutting of halving joints and the like comprising a machine frame including a work table, means to position a length of bar to be cut upon said table and means to present the work table and the bar to operating instrumentalities of the apparatus through relative movement therebetween, wherein said operating instrumentalitities comprising a plurality of cutting means arranged at spaced locations along the work table and capable of simultaneously forming a plurality of cuts in the bar at selected intervals along the length thereof.
2. Apparatus as claimed in claim 1, wherein there is provided a plurality of adjustable clamping devices each adapted to move between a bar-clamping and a retracted position.
3. Apparatus as claimed in either one of claim 1 and 2, wherein the table is provided with a plurality of slots, each slot being formed along the path of operation of one of said cutting means.
4. Apparatus as claimed in claim 3 wherein provision is made for adjusting the positions of said slots and of the associated cutting means with respect of said table.
5. Apparatus according to claim 4, wherein side walls of said slots are defined by side edges of segmented table edge portions arranged for adjustable location along a leading edge of the work table.
6. Apparatus as claimed in claim 1, wherein each cutting means comprising three cutting wheels operating in a desired sequence, all the cutting means following the sequence in a simultaneous manner.
7. Apparatus as claimed in either one of claims 1 and 6, wherein means are provided for adjusting the spacing between the cutting means according to the required intervals of distance between the notches to be cut in the bar.
8. Apparatus as claimed in claim 6, wherein the number of spaced locations at which cutting means are arranged is adjustable.
9. Apparatus as claimed in any one of the preceding claims, wherein the work table is provided with slots formed along the path of operation of each cutting means when the table is presented thereto, and provision is made to adjust the position of said slots as required.
10. Apparatus as claimed in any.one of the preceding claims, wherein means are provided to supply a plurality of bars in end-to-end sequence to said operating instrumentalities, a bar which has been cut being removed from the table as the next bar is advanced by the supply means.
11. Apparatus as claimed in claim 10, wherein the supply means comprises a hopper feed device adapted between operations of the apparatus to supply the next bar to the table, there being provided retractible end stop means to determine the correct position of the bar on the table.
12. Apparatus as claimed in any one of the preceding claims, wherein means are provided to advance the table towards and away from the operating instrumentalities, there being a series of trip switch means positioned in the path of the table to control its movements.
13. Apparatus as claimed in any one of the preceding claims, wherein the operating instrumentalities further include scribing heads adapted to operate on end portions of a bar.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8508145 | 1985-03-28 | ||
GB858508145A GB8508145D0 (en) | 1985-03-28 | 1985-03-28 | Bar cutting |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0202006A1 true EP0202006A1 (en) | 1986-11-20 |
Family
ID=10576843
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86302339A Withdrawn EP0202006A1 (en) | 1985-03-28 | 1986-03-27 | Apparatus for the cutting of halving joints |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0202006A1 (en) |
GB (2) | GB8508145D0 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3806116A1 (en) * | 1988-02-26 | 1989-09-07 | Ludolf Stegherr | DEVICE FOR POSITIONING ARC-SHAPED CROSSBODY FRAME PARTS AND MILLING KEYSTONE EXCEPTIONS IN THESE FRAME PARTS |
GB2552355A (en) * | 2016-07-20 | 2018-01-24 | Mighton Products Ltd | Cross joint milling machine |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR402232A (en) * | 1909-04-20 | 1909-10-01 | Ernst Carstens | Machine for making miter and half-timbered joints |
GB191228934A (en) * | 1911-12-16 | 1913-04-24 | Samuel Heath | Improvements in Oil and Gas Burners. |
DE382104C (en) * | 1921-07-02 | 1923-09-28 | Philippus Jacobus Schuytvlot | Milling machine for woodworking, especially for making cuts for cross connections and. like |
GB314927A (en) * | 1928-04-05 | 1929-07-05 | Alexander Morison | Improved wood-working machine for cutting joints in bars |
US2346146A (en) * | 1939-03-17 | 1944-04-11 | William B Boice | Woodworking machine |
GB714112A (en) * | 1951-05-30 | 1954-08-25 | Erik Estlander | Improvements relating to apparatus for feeding file material to file cutting machines |
US3010495A (en) * | 1960-02-04 | 1961-11-28 | Harold N Ipsen | Log notching machine |
FR1493085A (en) * | 1966-07-06 | 1967-08-25 | Quatre Moulins Berrard & Cie S | Linear divider device |
US3901114A (en) * | 1973-10-11 | 1975-08-26 | Black Clawson Co | Saw assembly |
FR2293290A1 (en) * | 1974-12-05 | 1976-07-02 | Gutknecht Andre | Milling machine for profiled window frames - has rigid frame with sliding support carriage and three independent milling cutters |
DE2503456A1 (en) * | 1974-11-28 | 1976-08-12 | Nippon Musical Instruments Mfg | METHOD AND DEVICE FOR DRILLING THROUGH HOLES |
NL8300174A (en) * | 1983-01-17 | 1984-08-16 | Intermecon Oldenzaal B V | Unit for milling grooves in knitting machine needle bed plate - has relative movements of cutters and work digitally servo-controlled |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB250320A (en) * | 1925-01-08 | 1926-04-08 | Herbert Pantin | Improvements in or relating to apparatus for forming dovetail grooves or slots in wood or other material |
GB483603A (en) * | 1937-03-18 | 1938-04-22 | William Hearfield Smith | Improvements in and relating to wood working machinery |
GB525005A (en) * | 1939-02-11 | 1940-08-20 | Frederick Walton Burrows | Improvements in and relating to machinery for cutting dovetails in timber |
GB1038179A (en) * | 1963-10-25 | 1966-08-10 | Jonsereds Fabrikers Ab | Apparatus for use in wood-working machines, for forming tenons on workpieces |
US3838723A (en) * | 1973-07-27 | 1974-10-01 | Commander Ind Inc | Dual dado machine |
US4009741A (en) * | 1976-03-23 | 1977-03-01 | E.Z. Mfg. Co. | Woodworking machine |
AU528357B2 (en) * | 1977-12-15 | 1983-04-28 | La Grouw, Johannes | Improvements in or relating to building planks and/or methods and/or apparatus for making thesame |
IE55016B1 (en) * | 1984-03-08 | 1990-04-25 | Allport Brian | Apparatus for cutting elongate members |
-
1985
- 1985-03-28 GB GB858508145A patent/GB8508145D0/en active Pending
-
1986
- 1986-03-27 EP EP86302339A patent/EP0202006A1/en not_active Withdrawn
- 1986-03-27 GB GB08607852A patent/GB2173149A/en not_active Withdrawn
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR402232A (en) * | 1909-04-20 | 1909-10-01 | Ernst Carstens | Machine for making miter and half-timbered joints |
GB191228934A (en) * | 1911-12-16 | 1913-04-24 | Samuel Heath | Improvements in Oil and Gas Burners. |
DE382104C (en) * | 1921-07-02 | 1923-09-28 | Philippus Jacobus Schuytvlot | Milling machine for woodworking, especially for making cuts for cross connections and. like |
GB314927A (en) * | 1928-04-05 | 1929-07-05 | Alexander Morison | Improved wood-working machine for cutting joints in bars |
US2346146A (en) * | 1939-03-17 | 1944-04-11 | William B Boice | Woodworking machine |
GB714112A (en) * | 1951-05-30 | 1954-08-25 | Erik Estlander | Improvements relating to apparatus for feeding file material to file cutting machines |
US3010495A (en) * | 1960-02-04 | 1961-11-28 | Harold N Ipsen | Log notching machine |
FR1493085A (en) * | 1966-07-06 | 1967-08-25 | Quatre Moulins Berrard & Cie S | Linear divider device |
US3901114A (en) * | 1973-10-11 | 1975-08-26 | Black Clawson Co | Saw assembly |
DE2503456A1 (en) * | 1974-11-28 | 1976-08-12 | Nippon Musical Instruments Mfg | METHOD AND DEVICE FOR DRILLING THROUGH HOLES |
FR2293290A1 (en) * | 1974-12-05 | 1976-07-02 | Gutknecht Andre | Milling machine for profiled window frames - has rigid frame with sliding support carriage and three independent milling cutters |
NL8300174A (en) * | 1983-01-17 | 1984-08-16 | Intermecon Oldenzaal B V | Unit for milling grooves in knitting machine needle bed plate - has relative movements of cutters and work digitally servo-controlled |
Also Published As
Publication number | Publication date |
---|---|
GB2173149A (en) | 1986-10-08 |
GB8508145D0 (en) | 1985-05-01 |
GB8607852D0 (en) | 1986-04-30 |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 19870521 |
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Inventor name: BROWN, IVAN VICTOR |