CN113465582B - Arc-shaped positioning pay-off device capable of being adjusted and reused and pay-off method thereof - Google Patents
Arc-shaped positioning pay-off device capable of being adjusted and reused and pay-off method thereof Download PDFInfo
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- CN113465582B CN113465582B CN202110583784.5A CN202110583784A CN113465582B CN 113465582 B CN113465582 B CN 113465582B CN 202110583784 A CN202110583784 A CN 202110583784A CN 113465582 B CN113465582 B CN 113465582B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
Abstract
The invention discloses an adjustable and reusable arc-shaped positioning pay-off device, which comprises: a pay-off plate; the two ends of the pay-off plate are detachably fixed on the supporting plate through fastening structures; electric putter, it includes middle part push rod and at least a pair of lateral part push rod, the middle part push rod sets up the middle part of backup pad, the expansion end of middle part push rod with the middle part fixed connection of actinobacillus board, at least a pair of the setting of lateral part push rod symmetry is in the both sides of middle part push rod, the stiff end of middle part push rod and lateral part push rod all with backup pad fixed connection to the butt is in behind the expansion end extension of electric putter on the actinobacillus board. The invention also provides a pay-off method of the arc-shaped positioning pay-off device capable of being adjusted and reused. The pay-off device can conveniently and quickly adjust the required arc, and has the characteristics of higher accuracy of the formed arc and the like.
Description
Technical Field
The invention relates to the field of pay-off rulers. More particularly, the invention relates to an adjustable and reusable arc-shaped positioning pay-off device and a pay-off method thereof.
Background
The construction application of the special-shaped building structure in the modern building engineering is more and more extensive, and the traditional measurement and pay-off positioning method has the defects of low efficiency and difficult quality control in the measurement and positioning pay-off of the special-shaped structure. Meanwhile, the requirements of the arc-shaped structure on engineering measurement are higher and higher, in the construction and setting-out measurement process of the large arc-shaped structure, the vertical transmission distance between a plane control net and an elevation is long, the required measurement station conversion is more, the measurement accumulated error is large, in addition, the building elevation height is often large, the lateral rigidity is smaller, and the technical difficulty of building construction measurement is increased. The design and construction of super high-rise buildings put higher requirements on the construction measurement precision. The existing arc-shaped positioning device has poor precision and is difficult to meet the requirements of super high-rise building design and construction on construction measurement precision. Therefore, a pay-off device with high precision is needed to meet the requirement of high precision of construction measurement.
Disclosure of Invention
It is an object of the present invention to address at least the above problems and to provide at least the advantages described hereinafter.
Still another object of the present invention is to provide an adjustable and reusable arc positioning pay-off device, which can conveniently and rapidly adjust the required arc, and has the characteristics of higher accuracy of the formed arc, etc.
To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, there is provided an adjustable and reusable arc positioning pay-off device, comprising:
a pay-off plate; the two ends of the pay-off plate are detachably fixed on the supporting plate through fastening structures;
electric putter, it includes middle part push rod and at least a pair of lateral part push rod, the middle part push rod sets up the middle part of backup pad, the expansion end of middle part push rod with the middle part fixed connection of actinobacillus board, at least a pair of the setting of lateral part push rod symmetry is in the both sides of middle part push rod, the stiff end of middle part push rod and lateral part push rod all with backup pad fixed connection to the butt is in behind the expansion end extension of electric putter on the actinobacillus board.
The invention utilizes the electric push rod to support the pay-off plate, thereby increasing the adjusting speed and leading the adjustment of the pay-off plate to be more convenient.
Preferably, the middle part of the pay-off plate is provided with a tooth groove, and the movable end abuts against the tooth groove when the electric push rod extends so as to support the pay-off plate to form an arc.
Preferably, the side push rods are 3 pairs and are arranged on two sides of the middle push rod at equal intervals.
Preferably, be provided with first engaging lug on the expansion end of lateral part push rod, be provided with the second engaging lug that corresponds with first engaging lug on the unwrapping wire board, when the lateral part push rod expansion end stretches out appointed length, if the expansion end of lateral part push rod still with the unwrapping wire board butt, with the extrusion of unwrapping wire board and make it be close to the expansion end of butt at the lateral part push rod, utilize the rope to pass first engaging lug, second engaging lug after-fixing with the expansion end of unwrapping wire board butt at the lateral part push rod.
Preferably, the electric push rod with controllable even flexible volume of middle part push rod and lateral part push rod, electric push rod is connected with control panel in order to control electric push rod's flexible volume through control panel control, control panel sets up in the backup pad. Through with the flexible volume prestore of middle part push rod and lateral part push rod in control panel, input known arc length and radius, can realize the calculation to middle part push rod and lateral part push rod elongation to control its elongation, make the adjustment to the unwrapping wire board more quick, and also make the arc precision that the unwrapping wire board formed higher, more standard.
Preferably, the mark on the pay-off plate has a scale, and the scale marks from the middle part of the pay-off plate to both ends respectively.
Preferably, the fastening structure includes:
the chute is arranged on the pay-off plate and is arranged along the length direction of the pay-off plate;
and the positioning bolt is arranged on the supporting plate and corresponds to the sliding groove, penetrates through the sliding groove and is connected with the nut so as to fix two ends of the pay-off plate on the supporting plate.
The pay-off method of the arc-shaped positioning pay-off device capable of being adjusted and reused comprises the following steps:
1) Inputting a known arc length L1 and a known radius R through a control panel, calculating a bow height h1 by a controller in the control panel, fixing a pay-off plate on a support plate and enabling the length of the pay-off plate between two connection points to be L1;
2) Inputting an instruction to a control panel to control the extension length of the movable end of the middle push rod to be h1, and jacking the pay-off plate;
3) A controller in the control panel calculates the telescopic amount X of the side push rod according to the height h1 of the arch, the radius R and the distance h2 between the side push rod and the middle push rod;
4) According to the calculation result, a controller in the control panel controls the extension of the movable end of the side push rod to correspond to the length X, the pay-off plate is jacked up, and the arc positioning pay-off device is adjusted to obtain an arc needing pay-off;
5) And finding out two points of which the distance on the arc to be scribed is more than half of the chord length and less than the chord length by using auxiliary equipment, and placing the adjusted pay-off plate of the arc positioning pay-off device on the two points for sequential scribing until the paying-off is finished.
Preferably, the middle push rod, the side push rods and the control panel are powered by a battery or an external power source.
Preferably, the amount of extension and retraction of the side push rod is:
the invention at least comprises the following beneficial effects:
firstly, the pay-off plate is jacked up through the electric push rod, automation of arc adjustment of the pay-off plate is achieved, and the pay-off plate arc adjustment device has the advantages of being high in adjustment speed, convenient to adjust and the like.
Secondly, the invention forms a plurality of supporting points on the pay-off plate by arranging a plurality of pairs of side push rods, reduces the manual adjustment error, ensures that the arc formed by the pay-off plate is more accurate, and improves the precision.
Thirdly, the extension amounts of the middle push rod and the side push rods at all positions are automatically controlled by the control panel, and the middle push rod and the side push rods at all positions are adjusted to extend corresponding extension amounts, so that the arc-shaped one-key adjustment formation of the pay-off plate is realized, and the pay-off plate is simple and convenient in use.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 illustrates a schematic structural view of a payoff plate;
FIG. 3 is a schematic view illustrating the structure of a jacket;
fig. 4 illustrates a left side perspective view of the jacket.
1. A pay-off plate; 2. a support plate; 3. a middle push rod; 4. a side push rod; 5. a jacket; 6. positioning the bolt; 7. a motor; 8. a control panel; 9. a chute; 10. and a nut.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can, for example, be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. The terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
Example 1
As shown in fig. 1-4, the present invention provides an adjustable and reusable arc positioning pay-off device, comprising:
a pay-off plate 1;
the two ends of the pay-off plate 1 are detachably fixed on the supporting plate 2 through fastening structures;
the electric push rod comprises a middle push rod 3 and at least one pair of side push rods 4, the middle push rod 3 is arranged in the middle of the supporting plate 2, the movable end of the middle push rod 3 is fixedly connected with the middle of the pay-off plate 1, the at least one pair of side push rods 4 are symmetrically arranged on two sides of the middle push rod 3, and the fixed ends of the middle push rod 3 and the side push rods 4 are fixedly connected with the supporting plate 2, so that the movable end of the electric push rod is abutted to the pay-off plate 1 after being extended;
the middle part of the pay-off plate 1 is provided with a tooth groove, and the movable end abuts against the tooth groove when the electric push rod extends so as to support the pay-off plate 1 to form an arc shape.
According to the invention, the electric push rod is utilized to support the pay-off plate 1, so that the adjusting speed is increased, and the pay-off plate 1 can be adjusted more conveniently.
Example 2
As shown in fig. 1-4, the present invention provides an adjustable and reusable arc positioning pay-off device, comprising:
a pay-off plate 1;
the two ends of the pay-off plate 1 are detachably fixed on the supporting plate 2 through fastening structures;
the electric push rod comprises a middle push rod 3 and a pair of side push rods 4, the middle push rod 3 is arranged in the middle of the supporting plate 2, the movable end of the middle push rod 3 is fixedly connected with the middle of the pay-off plate 1, the pair of side push rods 4 3 are symmetrically arranged on two sides of the middle push rod 3, the side push rods 4 are arranged on two sides of the middle push rod 3 at equal intervals, and the fixed ends of the middle push rod 3 and the side push rods 4 are fixedly connected with the supporting plate 2, so that the movable end of the electric push rod is abutted to the pay-off plate 1 after being extended;
a tooth groove is formed in the middle of the pay-off plate 1, and the movable end of the electric push rod abuts against the tooth groove when the electric push rod extends so as to support the pay-off plate 1 to form an arc shape;
the controllable electric putter of the even flexible volume of middle part push rod 3 and lateral part push rod 4, electric putter is connected with control panel 8 and controls electric putter's flexible volume through control panel 8, control panel 8 sets up in backup pad 2. The extension amounts of the middle push rod 3 and the side push rod 4 can be calculated by pre-storing the extension amounts of the middle push rod 3 and the side push rod 4 in the control panel 8 and inputting the known arc length and radius, and the extension amounts of the middle push rod 3 and the side push rod 4 can be controlled, so that the adjustment of the pay-off plate 1 is quicker, and the arc-shaped accuracy formed by the pay-off plate 1 is higher and more standard;
scales are marked on the pay-off plate 1, and are respectively marked from the middle part of the pay-off plate 1 to the two ends;
the fastening structure includes:
the sliding chute 9 is arranged on the pay-off plate 1, and the sliding chute 9 is arranged along the length direction of the pay-off plate 1;
and the positioning bolt 6 is arranged on the supporting plate 2 and corresponds to the sliding groove 9, and the positioning bolt 6 penetrates through the sliding groove 9 and then is connected with the nut 10 so as to fix two ends of the pay-off plate 1 on the supporting plate 2.
Example 3
As shown in fig. 1-4, the present invention provides an adjustable and reusable arc positioning pay-off device, comprising:
a pay-off plate 1;
the two ends of the pay-off plate 1 are detachably fixed on the supporting plate 2 through fastening structures;
the electric push rod comprises a middle push rod 3 and a pair of side push rods 4, the middle push rod 3 is arranged in the middle of the supporting plate 2, the movable end of the middle push rod 3 is fixedly connected with the middle of the pay-off plate 1, the pair of side push rods 4 3 are symmetrically arranged on two sides of the middle push rod 3, the side push rods 4 are arranged on two sides of the middle push rod 3 at equal intervals, and the fixed ends of the middle push rod 3 and the side push rods 4 are fixedly connected with the supporting plate 2, so that the movable end of the electric push rod is abutted to the pay-off plate 1 after being extended;
a tooth groove is formed in the middle of the pay-off plate 1, and the movable end of the electric push rod abuts against the tooth groove when the electric push rod extends so as to support the pay-off plate 1 to form an arc shape;
the controllable electric putter of the even flexible volume of middle part push rod 3 and lateral part push rod 4, electric putter is connected with control panel 8 and controls electric putter's flexible volume through control panel 8, control panel 8 sets up in backup pad 2. The extension amounts of the middle push rod 3 and the side push rod 4 are prestored in the control panel 8, and the known arc length and radius are input, so that the extension amounts of the middle push rod 3 and the side push rod 4 can be calculated, and the extension amounts of the middle push rod 3 and the side push rod 4 are controlled, so that the adjustment of the pay-off plate 1 is quicker, and the arc formed by the pay-off plate 1 is higher in precision and more standard;
scales are marked on the pay-off plate 1, and are respectively marked from the middle part of the pay-off plate 1 to the two ends;
the fastening structure includes:
the sliding chute 9 is arranged on the pay-off plate 1, and the sliding chute 9 is arranged along the length direction of the pay-off plate 1;
the positioning bolt 6 is rotatably arranged on the supporting plate 2 and corresponds to the sliding chute 9 so that the positioning bolt 6 can penetrate through the sliding chute 9;
the clamping sleeve 5 is of a convex structure, the lower portion of the clamping sleeve 5 is sleeved on the outer side of the supporting plate 2 and fixedly connected with the supporting plate 2, two ends of the pay-off plate 1 are movably sleeved on the upper portion of the clamping sleeve 5, a through hole corresponding to the positioning bolt 6 is formed in the clamping sleeve 5, nuts 10 are welded at the through hole on the upper side and the lower side of the clamping sleeve 5, the positioning bolt 6 penetrates through the through hole and is in threaded connection with the nuts 10, a through seam is formed in the upper portion of the clamping sleeve 5 so that a U-shaped structure is formed on one side of the upper portion plate and the lower portion of the clamping sleeve 5, and the through hole is formed in the U-shaped structure so that the pay-off plate 1 can be better clamped by the upper portion plate;
the mechanism of screwing, it includes motor 7, first bevel gear and second bevel gear, the lower extreme of positioning bolt 6 is provided with first bevel gear, motor 7 sets up in backup pad 2, two bevel gears set up on the output shaft of motor 7, first bevel gear and two bevel gears mesh mutually in order to rotate through motor 7 drive positioning bolt 6, motor 7 is connected with control panel 8 to forward rotation or the antiport through control panel 8 control motor 7 realize screwing up or loosen actinobacillus plate 1, drive positioning bolt 6 forward rotation and antiport.
When the wire drawing device is used for the first time, the arc length and the radius are input into the control panel 8, the control panel 8 calculates the arch height according to the arc length and the radius, the control panel 8 controls the middle push rod 3 to extend to the length of the arch height, at the moment, the length of the wire drawing plate 1 is adjusted, an instruction is input into the control panel 8 to drive the positioning bolt 6 to rotate so as to clamp and fix the two ends of the wire drawing plate 1 on the supporting plate 2, and the control panel 8 adjusts the extension of the side push rod 4 according to the calculation result so as to adjust the arc shape of the wire drawing plate 1;
when the drawing device is used again, the arc length and the radius are input into the control panel 8, the control panel 8 calculates the arch height according to the arc length and the radius, the control panel 8 compares the calculated arch height at this time with the calculated arch height at the last time, if the calculated arch height at this time is larger than the calculated arch height at the last time, the control panel 8 controls the motor 7 to rotate to loosen the paying-off plate 1 so that the paying-off plate can slide relative to the supporting plate 2, the control panel 8 controls the side push rod 4 to contract and controls the middle push rod 3 to extend to the calculated arch height length at this time, the control panel 8 inputs an instruction to drive the motor 7 to rotate to drive the positioning bolt 6 to rotate to clamp and fix the paying-off plate 1 after the length of the paying-off plate 1 is adjusted to the required arc length at this time, and the control panel 8 controls the side push rod 4 to extend to the calculated extension length at this time so as to adjust the arc shape of the paying-off plate 1; if the calculated arch height is smaller than the calculated arch height last time, the control panel 8 controls the motor 7 to rotate to loosen the pay-off plate 1 so that the pay-off plate can slide relative to the supporting plate 2, the control panel 8 controls the lateral push rod 4 to contract and controls the middle push rod 3 to contract to the calculated arch height length this time, the length of the pay-off plate 1 is adjusted to the required arc length this time, then the control panel 8 inputs an instruction to drive the motor 7 to rotate to drive the positioning bolt 6 to rotate to clamp and fix the pay-off plate 1, and the control panel 8 controls the lateral push rod 4 to extend to the calculated extension length this time so as to adjust the arc shape of the pay-off plate 1.
In this embodiment, the length of the pay-off plate 1 can be adjusted manually or by other known devices;
in this embodiment, the distance between the two positioning bolts 6 is 3m.
Example 4
A pay-off method of an arc-shaped positioning pay-off device capable of being adjusted and reused comprises the following steps:
1) Inputting a known arc length L1 and a known radius R through a control panel, calculating a bow height h1 by a controller in the control panel, fixing a pay-off plate on a support plate and enabling the length of the pay-off plate between two connection points to be L1;
2) Inputting an instruction to a control panel to control the extension length of the movable end of the middle push rod to be h1, and jacking up the pay-off plate;
3) A controller in the control panel calculates the telescopic amount X of the side push rod according to the height h1 of the arch, the radius R and the distance h2 between the side push rod and the middle push rod;
4) According to the calculation result, a controller in the control panel controls the extension of the movable end of the side push rod to correspond to the length X, the pay-off plate is jacked up, and the arc positioning pay-off device is adjusted to obtain an arc needing pay-off;
5) Finding out two points of which the distance on the arc to be scribed is more than half of the chord length and less than the chord length by using auxiliary equipment, and placing the adjusted pay-off plate of the arc positioning pay-off device on the two points for sequential scribing until the paying-off is finished;
the middle push rod, the side push rod and the control panel are powered by batteries or an external power supply;
amount of extension and retraction of the side push rod 4:
while embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (6)
1. Adjustable used repeatedly's arc location pay-off, its characterized in that includes:
a pay-off plate;
the two ends of the pay-off plate are detachably fixed on the supporting plate through fastening structures;
the electric push rod comprises a middle push rod and at least one pair of side push rods, the middle push rod is arranged in the middle of the supporting plate, the movable end of the middle push rod is fixedly connected with the middle of the pay-off plate, the at least one pair of side push rods are symmetrically arranged on two sides of the middle push rod, and the fixed ends of the middle push rod and the side push rods are fixedly connected with the supporting plate, so that the movable end of the electric push rod is abutted against the pay-off plate after being extended;
the electric push rod is connected with the control panel to control the stretching amount of the electric push rod through the control panel, and the control panel is arranged on the support plate;
scales are marked on the pay-off plate, and are respectively marked from the middle part to the two ends of the pay-off plate;
the fastening structure includes:
the chute is arranged on the pay-off plate and is arranged along the length direction of the pay-off plate;
the positioning bolt is rotatably arranged on the supporting plate and corresponds to the sliding groove in the direction of the sliding groove so that the positioning bolt can penetrate through the sliding groove;
the clamping sleeve is of a convex structure, the lower portion of the clamping sleeve is sleeved on the outer side of the supporting plate and fixedly connected with the supporting plate, two ends of the pay-off plate are movably sleeved on the upper portion of the clamping sleeve, a through hole corresponding to the positioning bolt is formed in the clamping sleeve, nuts are welded at the through hole on the upper side and the lower side of the clamping sleeve, the positioning bolt penetrates through the through hole and is in threaded connection with the nuts, a through seam is formed in the upper portion of the clamping sleeve so that the upper portion plate and the lower portion of the clamping sleeve form a U-shaped structure on one side, and the through hole is formed in the U-shaped structure so that the pay-off plate can be better clamped by the upper portion plate;
the screwing mechanism comprises a motor, a first bevel gear and a second bevel gear, the lower end of the positioning bolt is provided with the first bevel gear, the motor is arranged on the supporting plate, the second bevel gear is arranged on an output shaft of the motor, the first bevel gear and the second bevel gear are meshed to drive the positioning bolt to rotate through the motor, the motor is connected with the control panel, so that the forward rotation or the reverse rotation of the motor is controlled through the control panel to realize screwing or loosening of the pay-off plate, and the forward rotation and the reverse rotation of the positioning bolt are driven;
when the pay-off device is used for the first time, the arc length and the radius are input into the control panel, the control panel calculates the arch height according to the arc length and the radius, the control panel controls the middle push rod to extend to the arch height, at the moment, the length of the pay-off plate is adjusted, an instruction is input into the control panel to drive the positioning bolt to rotate so as to clamp and fix the two ends of the pay-off plate on the supporting plate, and the control panel adjusts the arc shape of the pay-off plate according to the calculation result of the expansion amount of the side push rod;
when the control panel is used again, the arc length and the radius are input into the control panel, the control panel calculates the arch height according to the arc length and the radius, the control panel compares the calculated arch height at this time with the calculated arch height at the last time, if the calculated arch height at this time is larger than the calculated arch height at the last time, the control panel controls the motor to rotate to loosen the pay-off plate so that the pay-off plate can slide relative to the supporting plate, the control panel controls the side push rod to contract and controls the middle push rod to extend to the calculated arch height at this time, the length of the pay-off plate is adjusted to the required arc length, then an instruction is input into the control panel to drive the motor to rotate so as to drive the positioning bolt to rotate to clamp and fix the pay-off plate, and the control panel controls the side push rod to extend to the calculated extension amount of the side push rod at this time so as to adjust the arc shape of the pay-off plate; if the calculated bow height is smaller than the calculated bow height last time, the control panel controls the motor to rotate to loosen the pay-off plate so that the pay-off plate can slide relative to the supporting plate, the control panel controls the side push rod to contract and controls the middle push rod to contract to the calculated bow height length this time, after the length of the pay-off plate is adjusted to the required arc length this time, an instruction is input to the control panel to drive the motor to rotate so as to drive the positioning bolt to rotate to clamp and fix the pay-off plate, and the control panel controls the side push rod to extend to the calculated telescopic amount of the side push rod this time so as to adjust the arc shape of the pay-off plate;
the method for calculating the expansion amount of the side push rod comprises the following steps:
r is the arc radius, and h1 is the arch height; h2 is the distance between the side push rod and the middle push rod.
2. The adjustable and reusable arc-shaped positioning pay-off device as claimed in claim 1, wherein a tooth groove is formed in the middle of the pay-off plate, and when the electric push rod extends, the movable end abuts against the tooth groove to support the pay-off plate to form an arc shape.
3. The adjustable re-usable arc positioning pay-off device as claimed in claim 1, wherein said side push rods are 3 pairs, and the side push rods are equally spaced on both sides of the middle push rod.
4. A method of paying out an adjustable re-usable arc positioning pay-off device as defined in any one of claims 1 to 3, comprising the steps of:
1) Inputting a known arc length L1 and a known radius R through a control panel, calculating a bow height h1 by a controller in the control panel, fixing a pay-off plate on a support plate and enabling the length of the pay-off plate between two connection points to be L1;
2) Inputting an instruction to a control panel to control the extension length of the movable end of the middle push rod to be h1, and jacking up the pay-off plate;
3) A controller in the control panel calculates the telescopic amount X of the side push rod according to the height h1 of the arch, the radius R and the distance h2 between the side push rod and the middle push rod;
4) According to the calculation result, a controller in the control panel controls the extension of the movable end of the side push rod to correspond to the length X, the pay-off plate is jacked up, and the arc positioning pay-off device is adjusted to obtain an arc needing pay-off;
5) And finding out two points with the distance larger than half of the chord length and smaller than the chord length on the arc to be scribed by using auxiliary equipment, and placing the regulated pay-off plate of the arc positioning pay-off device on the two points for sequential scribing until the paying-off is completed.
5. The method of claim 4, wherein the middle pushrod, the side pushrod and the control panel are powered by a battery or an external power source.
6. The pay-off method of the adjustable re-usable arc positioning pay-off device of claim 4, wherein the amount of extension and retraction of the side push rod is:
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| CN202110583784.5A CN113465582B (en) | 2021-05-27 | 2021-05-27 | Arc-shaped positioning pay-off device capable of being adjusted and reused and pay-off method thereof |
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| CN202110583784.5A CN113465582B (en) | 2021-05-27 | 2021-05-27 | Arc-shaped positioning pay-off device capable of being adjusted and reused and pay-off method thereof |
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| CN113465582B true CN113465582B (en) | 2023-03-21 |
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