NL2022697B1 - A method for sawing a profile, in particular a steel profile and a band saw machine - Google Patents

A method for sawing a profile, in particular a steel profile and a band saw machine Download PDF

Info

Publication number
NL2022697B1
NL2022697B1 NL2022697A NL2022697A NL2022697B1 NL 2022697 B1 NL2022697 B1 NL 2022697B1 NL 2022697 A NL2022697 A NL 2022697A NL 2022697 A NL2022697 A NL 2022697A NL 2022697 B1 NL2022697 B1 NL 2022697B1
Authority
NL
Netherlands
Prior art keywords
guide
profile
saw
distance
force
Prior art date
Application number
NL2022697A
Other languages
Dutch (nl)
Inventor
Johannes Nijsink Gerrit-Jan
Original Assignee
Voortman Steel Machinery Holding B V
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 Voortman Steel Machinery Holding B V filed Critical Voortman Steel Machinery Holding B V
Priority to NL2022697A priority Critical patent/NL2022697B1/en
Application granted granted Critical
Publication of NL2022697B1 publication Critical patent/NL2022697B1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D55/00—Sawing machines or sawing devices working with strap saw blades, characterised only by constructional features of particular parts
    • B23D55/08—Sawing machines or sawing devices working with strap saw blades, characterised only by constructional features of particular parts of devices for guiding or feeding strap saw blades
    • B23D55/088—Devices for feeding strap saw blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D59/00—Accessories specially designed for sawing machines or sawing devices
    • B23D59/001—Measuring or control devices, e.g. for automatic control of work feed pressure on band saw blade
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D53/00—Machines or devices for sawing with strap saw-blades which are effectively endless in use, e.g. for contour cutting
    • B23D53/04—Machines or devices for sawing with strap saw-blades which are effectively endless in use, e.g. for contour cutting with the wheels carrying the strap mounted shiftably or swingingly, i.e. during sawing, other than merely for adjustment
    • B23D53/045—Machines or devices for sawing with strap saw-blades which are effectively endless in use, e.g. for contour cutting with the wheels carrying the strap mounted shiftably or swingingly, i.e. during sawing, other than merely for adjustment with pivotedly mounted head carrying the saw wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D55/00—Sawing machines or sawing devices working with strap saw blades, characterised only by constructional features of particular parts
    • B23D55/04—Sawing machines or sawing devices working with strap saw blades, characterised only by constructional features of particular parts of devices for feeding or clamping work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D55/00—Sawing machines or sawing devices working with strap saw blades, characterised only by constructional features of particular parts
    • B23D55/08—Sawing machines or sawing devices working with strap saw blades, characterised only by constructional features of particular parts of devices for guiding or feeding strap saw blades
    • B23D55/082—Devices for guiding strap saw blades
    • B23D55/086—Devices for guiding strap saw blades with means for automatically adjusting the distance between the guides

Abstract

A method for sawing a profile, in particular a steel profile. The method comprises: providing a band saw machine provided with a saw band and two guides for guiding the saw band and for moving the saw band through the profile, setting a distance between the guides based on a width of the profile to be sawed, exerting an actual feed force on the saw band by means of the two guides for moving the saw band through the profile, and limiting the actual feed force to a maximum force value. The maximum force value of the feed force is determined in dependence of the distance between the guides.

Description

P119861NL00 Title: A method for sawing a profile, in particular a steel profile and a band saw machine
FIELD The invention relates to a method for sawing a profile, in particular a steel profile and a band saw machine.
BACKGROUND Voortman Steel Machinery sells band saw machines, e.g. VB1050 and VB1250. The known band saw machine comprises a stationary base frame and a saw table for supporting a profile. The saw table is connected to the stationary base frame. The band saw machine has a swivel frame which is connected to the stationary base frame so as to be swivable around a vertical center line. A sawing frame assembly is upwardly and downwardly movably connected to the swivel frame. The sawing frame assembly comprises a sawing frame and at least two saw band pulleys which are connected to the sawing frame of which at least one is drivable with a saw band driving motor. A saw band is guided over the saw band pulleys.
Finally, the sawing frame assembly has a first guide and the second guide for guiding the saw band. The known band saw machine additionally comprises a force sensor for measuring an actual feed force which is indicative of the force exerted by the saw band on the profile.
With the Voortman band saw machine a method for sawing a profile, in particular a steel profile is performed which comprises: - providing a band saw machine provided with a saw band and a first and a second guide for guiding the saw band and for moving the saw band through the profile; - setting a distance between the first guide and the second guide based on a width of the profile to be sawed;
- exerting an actual feed force on the saw band by means of the first guide and the second guide for moving the saw band through the profile; and - limiting the actual feed force to a maximum feed force value.
During sawing, a profile is positioned on the saw table and the sawing frame assembly is moved downwardly so that the saw band is moved through the profile. In such a band saw machine, the actual feed force, i.e. the force exerted on the saw band by the guides, determines the speed with which the saw band is moved through the profile, i.e. the feed, and thus determines the cutting time for cutting through the profile.
To minimise the cutting time, the actual feed force can be increased by increasing the speed of the downward movement of the sawing frame assembly. But in doing so, the increased feed force exerted on the saw band by the profile and the first and the second guides, can cause the saw band to bend between the guides resulting in a bad quality of the saw cut. This could manifest itself in e.g. a wave pattern on the saw cut, i.e. the saw cut is no longer straight. To prevent this unwanted bending, the known band saw machine comprises a force sensor for measuring the actual feed force. The force sensor provides an electrical signal which is indicative for the force exerted by the saw band on the profile. This signal is used in a control system to control the speed of the downward movement of the sawing frame assembly, i.e. the feed, so as to keep the actual feed force at or below a maximum feed force value thus preventing excessive bending of the saw band.
SUMMARY OF THE INVENTION An object of the invention is to provide a method for sawing a profile, in particular a steel profile, with an increased feed speed, without the risk of bending the saw band too much. Too much bending in the context of this description means that the saw cut made with the saw band which bends too much has a bad quality.
A bad quality would be e.g. a wave pattern on the saw cut, a slanted saw cut, jagged edges on the saw cut, an uneven cutting surface etc.
To that end, the invention provides a method according to claim 1. More particular, the method for sawing a profile, described in the background section 1s according to the invention characterized in that the maximum force value of the feed force is determined in dependence of the distance between the first guide and the second guide.
In the present invention, the guides, which are used to move the saw blade through the profile to be sawed, are placed at a distance from each other, spanning the width of the profile to be sawed.
This means that the guides are closer together when sawing a small profile, and spaced further apart when sawing a wide profile.
For each distance between the guides the maximum force value is determined in dependence of said distance.
The core of the invention lays in the realisation that by determining the maximum force value for each distance between the guides separately, as oppose to determining one, overall maximum force value, the maximum force value can be higher, when the guides are closer together.
The advantage of the present invention is that there can be an increase in feed force for profiles which are less wide, without risking bending of the saw blade too much.
This results in a reduced cutting time for these less wide profiles.
For a band saw machine which saws profiles of different widths, the method according to the invention will lead to an average lowering of cutting time and thus to an improved efficiency.
The invention also provides a band saw machine according to claim 7. In particular, the invention provides a band saw machine comprising: — a stationary base frame — a saw table for supporting a profile, the saw table being connected to the stationary base frame,
— a swivel frame which is connected to the stationary base frame so as to be swivable around a vertical center line, and — a sawing frame assembly which is upwardly and downwardly movably connected to the swivel frame, wherein the sawing frame assembly comprises: o a sawing frame; o at least two saw band pulleys which are connected to the sawing frame of which at least one is drivable with a saw band driving motor; o a saw band which is guided over the saw band pulleys; o a first guide and a second guide for guiding the saw band; The band saw machine further comprises: — a force determining unit for determining an actual feed force which is indicative for the force exerted by the saw band on the profile; — a control system which is configured to control the downward movement of the sawing frame assembly such that the actual feed force 1s kept at or below a maximum feed force value.
The band saw machine 1s characterized in that the control system is configured: — to receive a distance input , which distance input is indicative for the distance between the first guide and the second guide; — to determine the maximum feed force value in dependence of that distance input.
The effects and the advantages of the band saw machine according to the invention are the same as the effects and advantages of the method according to the invention.
The present invention will be further elucidated with reference to figures of exemplary embodiments. The embodiments may be combined or may be applied separately from each other.
BRIEF DESCRIPTION OF THE FIGURES Fig. 1 shows a perspective front/top/side view of an example of the band saw machine according to the mvention. Fig. 2 shows a front view of the example of Fig. 1. 5
DETAILED DESCRIPTION OF THE FIGURES In this application similar or corresponding features are denoted by similar or corresponding reference signs. The description of the various embodiments is not limited to the example shown in the figures and the reference numbers used in the detailed description and the claims are not intended to limit the description of the embodiments, but are included to elucidate the embodiments by referring to the example shown in the figures. In general, a band saw machine 10, of which an example is shown in the figures comprising a stationary base frame 20 and a saw table 22 for supporting a profile. The saw table 22 is connected to the stationary base frame 20. Further, the band saw machine 10 comprises a swivel frame 24 which is connected to the stationary base frame 20 so as to be swivable around a vertical center line. A sawing frame assembly 26 is upwardly and downwardly movably connected to the swivel frame. The sawing frame assembly comprises a sawing frame 28 and at least two saw band pulleys which are connected to the sawing frame 28 of which at least one is drivable with a saw band driving motor. A saw band 12 is guided over the saw band pulleys. A first guide 14 and a second guide 16 are part of the sawing frame assembly 26 for guiding the saw band. The band saw machine additionally comprises a force determining unit for determining an actual feed force which is indicative for the force exerted by the saw band 12 on the profile. Finally, the band saw machine comprises a control system which 1s configured to control the downward movement of the sawing frame assembly 26 such that the actual feed force is kept at or below a maximum feed force value. According to the invention, the band saw machine is characterized in that the control system is configured: — to receive a distance input , which distance input is indicative for the distance between the first guide 14 and the second guide 16; — to determine the maximum feed force value in dependence of that distance input.
The effects and advantages of the method for sawing a profile, including a steel profile, have been described in the summary section and these effects and advantages are inserted here by reference.
In an embodiment, the control system is configured to execute a control loop by: — using a signal from the force determining unit for determining the actual feed force as a feedback signal; and by — generating a control signal for controlling the downward movement of the sawing frame assembly 26 with respect to the swivel frame 24 thereby keeping actual feed force at or below the maximum feed force value.
In an embodiment the band saw machine 10 further comprises a distance determining unit configured to determine the distance between the first guide 14 and the second guide 16 and to generate the distance input that is received by the control system on the basis of the determined distance.
Such a distance determining unit minimized the risk of making mistakes when determining the distance input.
Instead of using a distance determining unit, the distance input can also be inputted by means of a keyboard on the controller of the band saw machine 10. Alternatively, the distance input may also be calculated on the basis of the width of the profile to be sawn. In another alternative, information which is used for automatically setting the distance between the first guide 14 and the second guide 16 can be used to determine the distance input of the control system 14. In an embodiment, the distance determining unit may be a distance sensor, e.g. a laser distance meter or a linear encoder.
With such a distance sensor, the distance between the first and the second guides 14, 16 can be determined very precise and in a cost effective manner.
Such a distance sensor may, for example, be beneficial when the distance between the guides is set by hand.
In an alternative embodiment, the distance between the first and the second guides 14, 16 may be set by a drive.
A controller for controlling the drive for setting the distance between the guides 14, 16 may additionally have the function of the distance determining unit that provides the distance input to the control system which distance input is indicative for the distance between the first guide 14 and the second guide 16. The drive may for example be a clamp drive which is primarily used for controlling a profile clamp assembly of the band saw machine 10 as will become from the following description.
The band saw machine 10 may comprise a first profile clamp 30, a second profile clamp 32, and a profile receiving space 34 between the first and the second profile clamps 30, 32. The first and second profile clamps 30, 32 are moveable away from and towards each other for clamping a profile between the first and the second clamp 30, 32 such that the profile is fixated with respect to the saw table 22 and the swivel frame 24. One of the clamps may have a fixed position and serve as a stop or abutment.
In an embodiment, the first guide 14 may be vertically movably connected to the first profile clamp 30. A movement of the first profile clamp towards or away from the second profile clamp 32 results in a corresponding movement of the first guide 14 towards or away from the second guide 16.
In an embodiment, the second guide 16 may be vertically movably connected to the second profile clamp 32. A movement of the second profile clamp 32 towards or away from the first profile clamp 30 results in a corresponding movement of the second guide 16 towards or away from the first guide 14.
With these last two embodiments, the setting of the distance between the first and the second guides 14, 16 is performed automatically during clamping of the profile between the first and the second profile clamps 30, 32. Not only has this the advantage of achieving an optimal distance between the first and the second guides 14, 16 in a very quick manner, namely simultaneously with the clamping of the profile, also the risk of setting the distance between the guides 14, 16 wrongly is excluded. Further, by connecting the first guide 14 to the first profile clamp 30 and connecting the second guide 16 to the second profile clamp 32, the first guide 14 and the second guide 16 are always as close as possible to the profile when the profile is clamped between the first and the second profile clamps 30, 32. Thus, always a minimum distance between the first and the second guides 14, 16 is obtained and, consequently, the maximum feed force value will always be determined at the highest possible level for a give profile.
Thus, the feed force that can be exerted will then be as high as possible and the time needed for sawing the profile will be as short as possible while keeping a high quality saw cut and without damaging the saw blade 12 and/or the band saw machine 10.
The method for sawing a profile, in particular a steel profile, comprises in most general terms: - providing a band saw machine 10 provided with a saw band 12 and a first and a second guide 14, 16 for guiding the saw band 12 and for moving the saw band 12 through the profile; - setting a distance between the first guide 14 and the second guide 16 based on a width of the profile to be sawed;
- exerting an actual feed force on the saw band 12 by means of the first guide 14 and the second guide 16 for moving the saw band 12 through the profile; and - limiting the actual feed force to a maximum feed force value, wherein the maximum force value of the feed force is determined in dependence of the distance between the first guide 14 and the second guide
16. In an embodiment, the method may further comprise: - determining the actual feed force; and - controlling a feed speed of a feed movement of the first and the second guides 14, 16 and the saw band 12 for keeping the actual feed force substantially at a predetermined feed force value when the saw band 12 1s guided through the profile, wherein the predetermined force value is set at or below the maximum feed force value.
In order to keep the actual feed force below the maximum feed force value, it 1s advantageous to know said actual feed force. The advantage of this embodiment is that it determines the actual feed force and uses its value to keep the feed force at a predetermined, constant value. This predetermined value can be at, but also below, the maximum feed force value. It can of course not be above the maximum feed force value without risking damage to the saw band 12 or the band saw machine 10 or without risking a too severe bending of the saw band 12 resulting in a saw cut with a less than optimal quality.
The determining of the actual feed force may be performed by at least one force sensor 18 provided on at least one of the two guides 14, 16. But other known means of determining the actual feed force could be used as well.
In an embodiment, the determining of the actual feed force may be performed by acquiring the amount of power needed for driving the feed movement, i.e. the downward movement of the saw frame assembly, which power is indicative for the actual feed force, and by converting said amount of power in the actual feed force. Thus a force sensor may not be needed, which may be beneficial from a cost perspective. In an embodiment, the method may further comprise automatically determining the distance between the first guide 14 and the second guide
16. Automatically determining the distance between the first guide 14 and the second guide 16 prevents that human mistakes are made with the possible risk that the actual feed force may exceed the maximum feed force value that belongs to the actual distance between the first guide 14 and the second guide 16. Thus, with this embodiment, the risk of damage or poor cutting quality is reduced. In an embodiment, the method may further comprise: — receiving in a control system of the band saw machine a distance input delivered by a distance determining unit indicating the distance between the first guide 14 and the second guide 16; and — determining the maximum feed force value in dependence of that distance input. This embodiment further elucidates how the automatically determining of the distance between the first and the second guides 14, 16 may be performed, namely by means of a distance determining unit. The distance determining unit may be a distance sensor, e.g. a laser distance meter or a linear encoder. Other distance determining units are feasible as well as described above. According to this embodiment, the distance determining unit produces a distance input which indicates the distance between the first guide 14 and the second guide 16. Based on that distance input, the control system may determine the maximum feed force value. In other words, the maximum feed force value depends on the distance input which is indicative for the distance between the first and the second guide
14, 16 and will be higher when the distance is relatively small and will be lower when the distance 1s relatively large.
The various embodiments which are described above may be used implemented independently from one another and may be combined with one another in various ways.
The reference numbers used in the detailed description and the claims do not limit the description of the embodiments nor do they limit the claims.
The reference numbers are solely used to clarify.
Legend 10 — band saw machine 12 — saw band 14 — first guide
16 — second guide 18 — force sensor 20 — base frame 22 — saw table
24 swivel frame 26 — sawing frame assembly 28 — sawing frame 30 — first profile clamp 32 — second profile clamp
34 — profile receiving space

Claims (15)

ConclusiesConclusions 1. Een werkwijze voor het zagen van een profiel, in het bijzonder een stalen profiel, waarbij de werkwijze omvat: - het verschaffen van een zaaghandmachine (10) voorzien van een zaagband (12) en een eerste en een tweede geleider (14, 16) voor het geleiden van de zaagband (12) en voor het bewegen van de zaagband (12) door het profiel; - het instellen van een afstand tussen de eerste geleider (14) en de tweede geleider (16), waarbij de afstand is gebaseerd op een breedte van het te zagen profiel; - het door middel van de eerste geleider (14) en de tweede geleider (16) uitoefenen van een actuele aanzetkracht op de zaagband (12) voor het bewegen van de zaagband (12) door het profiel; en - het beperken van de actuele aanzetkracht tot een maximum aanzetkracht, met het kenmerk dat de maximum aanzetkracht wordt bepaald in afhankelijkheid van de afstand tussen de eerste geleider (14) en de tweede geleider (16).A method of sawing a profile, in particular a steel profile, the method comprising: - providing a hand-held sawing machine (10) provided with a saw band (12) and a first and a second guide (14, 16) ) for guiding the saw band (12) and for moving the saw band (12) through the profile; - setting a distance between the first guide (14) and the second guide (16), the distance being based on a width of the profile to be sawn; - exerting a current starting force on the saw band (12) by means of the first guide (14) and the second guide (16) for moving the saw band (12) through the profile; and - limiting the actual starting force to a maximum starting force, characterized in that the maximum starting force is determined in dependence on the distance between the first guide (14) and the second guide (16). 2 De werkwijze volgens conclusie 1, verder omvattend: - het bepalen van de actuele aanzetkracht; en - het besturen van een aanzetsnelheid van een aanzetbeweging van de eerste en de tweede geleider (14, 16) en de zaagband (12) voor het in hoofdzaak op een voorafbepaalde waarde houden van de actuele aanzetkracht wanneer de zaagband (12) door het profiel wordt geleid, waarbij de voorafbepaalde waarde is ingesteld op of onder de waarde van de maximum aanzetkracht.The method of claim 1, further comprising: - determining the current trigger force; and - controlling a starting speed of a starting movement of the first and the second guide (14, 16) and the saw band (12) to keep the current starting force substantially at a predetermined value as the saw band (12) passes through the profile. is guided with the predetermined value set at or below the value of the maximum trigger force. 3. De werkwijze volgens conclusie 2, waarbij het bepalen van de actuele aanzetkracht wordt uitgevoerd door ten minste één krachtsensor (18) die is voorzien op ten minste één van de eerste en de tweede geleiders (14, 16).The method of claim 2, wherein the determination of the current trigger force is performed by at least one force sensor (18) provided on at least one of the first and second conductors (14,16). 4. De werkwijze volgens conclusie 2, waarbij het bepalen van de actuele aanzetkracht wordt uitgevoerd door het vaststellen van de hoeveelheid vermogen die nodig is voor het uitvoeren van de aanzetbeweging, dat wil zeggen de neerwaarts gerichte beweging van het zaagframesamenstel, welk vermogen indicatief is voor de actuele aanzetkracht, en door het converteren van voornoemde hoeveelheid vermogen naar de actuele aanzetkracht.The method of claim 2, wherein determining the current triggering force is performed by determining the amount of power required to perform the triggering motion, i.e. the downward motion of the saw frame assembly, which power is indicative of the actual starting force, and by converting said amount of power to the actual starting force. 5. De werkwijze volgens één van de voorgaande conclusies, verder omvattend: - het automatisch bepalen van de afstand tussen de eerste geleider (14) en de tweede geleider (16).The method of any preceding claim, further comprising: - automatically determining the distance between the first guide (14) and the second guide (16). 6. De werkwijze volgens conclusie 5, verder omvattend: - het in een besturing van de zaagbandmachine ontvangen van een afstandsinvoer afgegeven door een afstandbepalingseenheid, waarbij de afstandsinvoer de afstand aangeeft tussen de eerste geleider (14) en de tweede geleider (16); en - het bepalen van de maximum aanzetkracht in afhankelijkheid van die afstandsinvoer.The method of claim 5, further comprising: - receiving in a controller of the saw band machine a distance input output from a distance determining unit, the distance input indicating the distance between the first guide (14) and the second guide (16); and - determining the maximum trigger force in dependence on said remote input. 7. Een zaagbandmachine (10) omvattend: - een vast basisframe (20) - een zaagtafel (22) ingericht voor het ondersteunen van een profiel, waarbij de zaagtafel (22) is verbonden met het vaste basisframe (20),A saw band machine (10) comprising: - a fixed base frame (20) - a saw table (22) arranged to support a profile, the saw table (22) being connected to the fixed base frame (20), - een zwenkframe (24) dat zodanig met het vaste basisframe is verbonden dat het zwenkbaar is rond een verticale middenlijn, en - een zaagframesamenstel (26) dat opwaarts en neerwaarts beweegbaar is verbonden met het zwenkframe, waarbij het zaagframesamenstel omvat: 0 een zaagframe (28); Oo ten minste twee zaagbandpoelies die verbonden zijn met het zaagframe (28) en waarvan er ten minste één met een zaagbandaandrijfmotor aandrijfbaar is; ° een zaagband (12) die over de zaagbandbandpoelies wordt geleid; © een eerste geleider (14) en een tweede geleider (16) voor het geleiden van de zaagband; waarbij de zaagbandmachine (10) omvat: - een krachtbepalingseenheid voor het bepalen van een actuele aanzetkracht die indicatief is voor de door de zaagband (12) op het profiel uitgeoefende kracht; - een besturing die is ingericht de neerwaartse beweging van het zaagframesamenstel zodanig te besturen dat de actuele aanzetkracht op of onder een maximum aanzetkracht wordt gehouden, met kenmerk dat de besturing is ingericht: - een afstandsinvoer te ontvangen, waarbij de afstandsinvoer indicatief is voor de afstand tussen de eerste geleider (14) en de tweede geleider (16); - de maximum aanzetkracht te bepalen in afhankelijkheid van die afstandsmvoer.- a pivot frame (24) connected to the fixed base frame such that it is pivotable about a vertical centerline, and - a saw frame assembly (26) movably connected to the pivot frame, the saw frame assembly comprising: 0 a saw frame ( 28); At least two saw band pulleys connected to the saw frame (28) and at least one of which is drivable with a saw band drive motor; ° a saw band (12) which is guided over the saw band band pulleys; © a first guide (14) and a second guide (16) for guiding the saw band; wherein the saw band machine (10) comprises: - a force determining unit for determining a current starting force indicative of the force exerted on the profile by the saw band (12); - a control adapted to control the downward movement of the saw frame assembly in such a way that the current starting force is kept at or below a maximum starting force, characterized in that the control is arranged: - to receive a distance input, the distance input being indicative of the distance between the first guide (14) and the second guide (16); - to determine the maximum starting force in dependence on that distance. 8. De zaagbandmachine volgens conclusie 7, waarbij de besturing is ingericht een regellus uit te voeren door:The saw band machine of claim 7, wherein the controller is configured to perform a control loop by: - het gebruiken van een signaal van de krachtbepalingseenheid voor het bepalen van de actuele aanzetkracht als een feedbacksignaal, en door - het genereren van een stuursignaal voor het besturen van de neerwaartse beweging van het zaagframesamenstel (26) ten opzichte van het zwenkframe (24) waarbij de actuele aanzetkracht op of onder de maximum aanzetkracht wordt gehouden.- using a signal from the force determining unit to determine the current trigger force as a feedback signal, and by - generating a control signal to control the downward movement of the saw frame assembly (26) relative to the pivot frame (24) wherein the current feed force is kept at or below the maximum feed force. 9. De zaagbandmachine volgens conclusie 7 of 8, verder omvattend een afstandbepalingseenheid die is ingericht voor het vaststellen van de afstand tussen de eerste geleider (14) en de tweede geleider (16) en voor het op basis van de bepaalde afstand genereren van de afstandsinvoer die wordt ontvangen door de besturing.The saw band machine according to claim 7 or 8, further comprising a distance determining unit arranged to determine the distance between the first guide (14) and the second guide (16) and to generate the distance input based on the determined distance. received by the controller. 10. De zaagbandmachine volgens conclusie 9, waarbij de afstandbepalingseenheid een afstandssensor is, bijvoorbeeld een laser afstandsmeter of een lineaire encoder.The saw band machine according to claim 9, wherein the distance determining unit is a distance sensor, for example a laser distance meter or a linear encoder. 11. De zaagbandmachine volgens één van claims 7-10, waarbij de zaagbandmachine (10) is voorzien van een eerste profielklem (30), een tweede profielklem (32), en een profielopneemruimte (34) tussen de eerste en de tweede profielklemmen (30, 32), waarbij de eerste en de tweede profielklemmen (30, 32) naar elkaar toe en van elkaar af beweegbaar zijn voor het zodanig klemmen van een profiel tussen de eerste en de tweede klem (30, 32) dat het profiel is vastgezet ten opzichte van de zaagtafel (22) en het zwenkframe (24).The saw band machine according to any one of claims 7-10, wherein the saw band machine (10) includes a first profile clamp (30), a second profile clamp (32), and a profile receiving space (34) between the first and second profile clips (30). , 32), wherein the first and second profile clips (30, 32) are movable towards and away from each other to clamp a profile between the first and second clip (30, 32) such that the profile is secured to the saw table (22) and swing frame (24). 12. De zaagbandmachine volgens conclusie 11, waarbij de eerste geleider (14) verticaal beweegbaar is verbonden met de eerste profielklem (30),The saw band machine according to claim 11, wherein the first guide (14) is vertically movably connected to the first profile clamp (30), waarbij een beweging van de eerste profielklem (30) naar de tweede profielklem (32) toe of van de tweede profielklem (32) af resulteert in een overeenkomstige beweging van de eerste geleider (14) naar de tweede geleider (16) toe of van de tweede geleider (16) af.whereby a movement from the first profile clamp (30) towards the second profile clamp (32) or away from the second profile clamp (32) results in a corresponding movement from the first guide (14) towards the second guide (16) towards or away from the second guide (16). 13. De zaagbandmachine volgens conclusie 11 of 12, waarbij de tweede geleider (16) verticaal beweegbaar is verbonden met de tweede profielklem (32), waarbij een beweging van de tweede profielklem (32) naar de eerste profielklem (30) toe of van de eerste profielklem (30) af resulteert in een overeenkomstige beweging van de tweede geleider (16) naar de eerste geleider (14) toe of van de eerste geleider (14) af.The saw band machine according to claim 11 or 12, wherein the second guide (16) is vertically movably connected to the second profile clamp (32), whereby movement of the second profile clamp (32) towards or away from the first profile clamp (30). first profile clamp (30) results in a corresponding movement of the second guide (16) towards or away from the first guide (14). 14. De zaagbandmachine volgens één van de conclusies 7-13, waarbij de krachtbepalingseenheid een krachtssensor (18).The saw band machine according to any of claims 7-13, wherein the force determining unit is a force sensor (18). 15. De zaagbandmachine volgens één van de conclusies 7-13, waarbij de krachtbepalingseenheid een module is die is geconfigureerd om de hoeveelheid vermogen vast te stellen die nodig 1s voor het aandrijven van de aanzetbeweging, dat wil zeggen de neerwaartse beweging van het zaagframesamenstel, welk vermogen indicatief is voor de actuele aanzetkracht, en waarbij de module is configureerd voor het omzetten van voornoemde hoeveelheid vermogen in de actuele aanzetkracht.The saw band machine according to any one of claims 7-13, wherein the force determination unit is a module configured to determine the amount of power required to drive the starting motion, i.e. the downward movement of the saw frame assembly, which power is indicative of the actual trigger force, and wherein the module is configured to convert said amount of power into the actual trigger force.
NL2022697A 2019-03-08 2019-03-08 A method for sawing a profile, in particular a steel profile and a band saw machine NL2022697B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL2022697A NL2022697B1 (en) 2019-03-08 2019-03-08 A method for sawing a profile, in particular a steel profile and a band saw machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2022697A NL2022697B1 (en) 2019-03-08 2019-03-08 A method for sawing a profile, in particular a steel profile and a band saw machine

Publications (1)

Publication Number Publication Date
NL2022697B1 true NL2022697B1 (en) 2020-09-17

Family

ID=66776831

Family Applications (1)

Application Number Title Priority Date Filing Date
NL2022697A NL2022697B1 (en) 2019-03-08 2019-03-08 A method for sawing a profile, in particular a steel profile and a band saw machine

Country Status (1)

Country Link
NL (1) NL2022697B1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4335638A (en) * 1979-09-05 1982-06-22 Gesellschaft Fur Schneidtechnik Mit Beschrankter Haftung Band-saw machine
US4437367A (en) * 1980-03-27 1984-03-20 Karl Hauser Process and apparatus for controlling the cutting feed of band saw machines
DE19610175A1 (en) * 1996-03-15 1997-09-18 Eisele Gmbh Maschinen Und Saeg Mitering saw band for profile or solid stock

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4335638A (en) * 1979-09-05 1982-06-22 Gesellschaft Fur Schneidtechnik Mit Beschrankter Haftung Band-saw machine
US4437367A (en) * 1980-03-27 1984-03-20 Karl Hauser Process and apparatus for controlling the cutting feed of band saw machines
DE19610175A1 (en) * 1996-03-15 1997-09-18 Eisele Gmbh Maschinen Und Saeg Mitering saw band for profile or solid stock

Similar Documents

Publication Publication Date Title
CN101623878B (en) Sheet-processing lathe
CN105834474A (en) Pipe punching machine tool
US10596645B2 (en) Sawing machine and method for controlling a sawing machine
JP2014237216A (en) Saw machine and saw machine control method
CN105492154A (en) Horizontal band saw machine
EP2156930A3 (en) Method and apparatus for automatically adjusting a miter saw fence
US4397089A (en) Straight line guide on electric power hand saw
CN206520057U (en) A kind of portable raw bamboo cutting equipment
NL2022697B1 (en) A method for sawing a profile, in particular a steel profile and a band saw machine
EP2167266B1 (en) A panel saw machine
JP5461947B2 (en) Main body vise device in band saw machine
CN104385380B (en) Full-automatic log sawing machine
CN208100580U (en) A kind of combined type timber cutting operation platform
CN110699943A (en) Full-automatic edge shearing and ironing device of setting machine and control method thereof
CN101633182B (en) Novel plate cutting method
CN211803567U (en) Gas-cooker thermocouple wire unloader
CN204295784U (en) A kind of full-automatic log splitter
CN102284998B (en) Cutting device
CN215824571U (en) Laser cutting machine mesa sword strip adjusting device
CN112008168A (en) Cutting equipment for processing magnetic recording target material
CN211614527U (en) Convenient type copper bar divides strip machine
CN220127489U (en) Numerical control movable steel bar sawing machine
CN218285776U (en) Profiled bar cutting machine
CN214752894U (en) Automatic sawing equipment for piano string codes
CN107914037B (en) Steel grating shearing machine

Legal Events

Date Code Title Description
MM Lapsed because of non-payment of the annual fee

Effective date: 20220401