CN214394558U - Dovetail joint large-section hollow wood prism made of small-diameter wood - Google Patents
Dovetail joint large-section hollow wood prism made of small-diameter wood Download PDFInfo
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- CN214394558U CN214394558U CN202023037970.9U CN202023037970U CN214394558U CN 214394558 U CN214394558 U CN 214394558U CN 202023037970 U CN202023037970 U CN 202023037970U CN 214394558 U CN214394558 U CN 214394558U
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Abstract
A dovetail joint large-section hollow wood prism made of small-diameter wood has a regular polygon cross section outline, and is formed by gluing a plurality of isosceles trapezoid cross section unit bodies with dovetail mortises at two ends of the same structure side surface through an inclined side surface and the inner surface of the dovetail mortises, connecting a assembly by using double dovetail tenon-shaped wood pins, and cold-pressing gluing; the length of the unit body is3100mm, 120mm in width of the bottom surface and 60mm in thickness, a part of cylindrical surface can be remained between the inclined side surface and the top surface, the diameter D of the inscribed cylinder of the wood prism depends on the required number n of unit bodies,
the included angle alpha between the two inclined side surfaces of the unit bodies depends on the number n of the unit bodies forming the large-section hollow wood prism,
each unit body is provided with 4 dovetail mortises which are respectively close to two ends of the unit body and are positioned on the inclined side surface, and the unit bodies are connected by adopting double dovetail tenon-shaped wood pins, so that the assembly is convenient, the precision is high, and the quality is good.
Description
Technical Field
The utility model belongs to the wood working field relates to path wood processing and utilizes the technique, and specifically speaking is a big section hollow wood prism of dovetail joint with path wood preparation.
Background
The yield of large-diameter wood produced in China at present is small, and the yield of small-diameter wood is large. The small-diameter wood refers to wood which is cut from natural secondary forests or artificial fast-growing forests and has the diameter of 60-160 mm. In recent years, with the development of wood processing and utilizing technology, the utilization field of small-diameter wood is expanded, and the utilization rate and the utilization value are improved. However, the utilization rate and the utilization value of the small diameter wood still have a space for further improvement, and the small diameter wood still is a hot problem for the research in the field of wood processing in the future. As one of important building components, a wood column can bear the effects of tension, pressure, shear force, bending moment and torque, generally needs to be made of large-diameter wood, has high requirements on the quality of raw wood, and is generally of a solid structure. However, according to the research of mechanical analysis, the material in the middle of the wood column does not contribute much to the mechanical strength, so the solid wood column not only has heavy weight, but also wastes wood resources. The hollow wooden column can reduce the dead weight of the wooden structure, improve the rigidity of the structure and has good anti-seismic performance. If the small-diameter wood can be used for manufacturing the hollow wood prism, a large amount of high-quality wood can be saved, and the utilization rate and the utilization value of the small-diameter log can be improved. However, when a small-diameter wood is used to make a large-section hollow wood prism with an inscribed cylinder diameter of more than 400mm, the assembly operation is difficult and the assembly precision is poor, thereby affecting the quality of the large-section hollow wood prism.
Disclosure of Invention
For further widen the utilization field of path wood and the timber utilization ratio and the value of utilizing that improve the path wood, make things convenient for the operation of hollow wooden prism when the group blank, improve the group blank precision to guarantee the quality of hollow wooden prism, also for reducing ligneous loss in the course of working simultaneously, the utility model provides a length of making for 150mm ~ 160 mm's path wood with the minor end diameter is 3100mm, the hollow wooden prism of dovetail connection that inscribe cylinder diameter is greater than 400 mm. The technical problem to be solved is a dovetail joint hollow wood prism structure and a manufacturing method thereof.
In order to solve the technical problem, the utility model discloses a following technical scheme:
(1) the utility model provides a big section hollow wooden prism of dovetail connection with path wood preparation which characterized in that: saidThe outer contour of the cross section of the large-section hollow wood prism connected by the dovetail joint is a regular polygon, and the large-section hollow wood prism is formed by gluing a plurality of isosceles trapezoid cross-section unit bodies with dovetail mortises and identical structures on the inclined side surfaces and the inner surfaces of the dovetail mortises, connecting and assembling by using double dovetail tenon-shaped wood pins, and cold-pressing and gluing; the isosceles trapezoid cross-section unit body with the dovetail mortises is 3100mm in length, 120mm in width at the bottom and 60mm in thickness, and partial cylindrical surfaces can be reserved between the inclined side surfaces and the top surface; the diameter D of the inner tangent cylinder of the dovetail joint large-section hollow wood prism depends on the number n of the required isosceles trapezoid section unit bodies with dovetail grooves,
the included angle alpha between the two inclined side surfaces of the isosceles trapezoid cross section unit bodies with the dovetail mortises depends on the number n of the isosceles trapezoid cross section unit bodies required by the large-section hollow wood prism,
(2) dovetail mortise be located on the two slope sides of isosceles trapezoid cross section cell cube, total 4, respectively near the both ends of isosceles trapezoid cross section cell cube, the one end of dovetail mortise is at the terminal surface upper shed of isosceles trapezoid cross section cell cube, the other end is the semicircle blind end, the bottom surface and the slope side in dovetail mortise are parallel, the distance of the open end to the circular arc enclosed segment centre of a circle of every dovetail mortise is 300mm, the bottom surface length of dovetail mortise is 309.5mm, the bottom surface width is 19mm, the dovetail mortise degree of depth is 10mm, contained angle between the dovetail mortise both sides face is 28, dovetail rabbet central line is parallel and the distance is 30mm with the bottom surface edge of isosceles trapezoid cross section cell cube.
(3) One end of the double-dovetail tenon-shaped wooden pin is a flat end, the other end of the double-dovetail tenon-shaped wooden pin is a semi-arc end, the distance from the flat end to the center of the semi-arc end is 300mm, the total length of the double-dovetail tenon-shaped wooden pin is 309.5mm, the thickness of the double-dovetail tenon-shaped wooden pin is 20mm, the width of the double-dovetail tenon-shaped wooden pin is 19mm, two sides of the double-dovetail tenon-shaped wooden pin are symmetrical V-shaped grooves, and the included angle between the two side surfaces of each V-shaped groove is 152 degrees.
The utility model has the advantages of as follows:
(1) the utilization rate of the small-diameter wood can be improved. The method for symmetrically processing a small-diameter wood into two units with isosceles trapezoid cross sections has the advantages that the outturn percentage is obviously higher than that of the units with rectangular cross sections, and the utilization rate of wood for manufacturing the large-section hollow wood prism by using the small-diameter wood is over 70 percent.
(2) Further broadens the application field of the small-diameter logs and improves the use value of the small-diameter logs.
(3) The dovetail joint mode is adopted to manufacture the hollow wood prism with the diameter of the inscribed cylinder larger than 400mm, the assembly is convenient and fast, the assembly precision is high, and the quality is good.
(4) Only need process out a segment forked tail tongue-and-groove at the both ends of isosceles trapezoid cross section cell cube, adopt forked tail tenon shape cotter pin to connect, need not to process out tongue-and-groove and tenon that link up on isosceles trapezoid cross section cell cube, the timber loss is little.
Drawings
FIG. 1 is a schematic view of a small-diameter log section saw
FIG. 2 is a schematic view of edge trimming of a rough edge plate
FIG. 3 is a schematic diagram of the fixed-thickness finish machining of a dry flush edge plate
FIG. 4 schematic diagram for making isosceles trapezoid cross-section unit bodies
FIG. 5 schematic diagram for preparing isosceles trapezoid cross-section unit bodies with dovetail mortises
FIG. 6 is a view showing a structure of an isosceles trapezoid cross-section unit body with dovetail mortises
FIG. 7 is a schematic view of a processing of a double dovetail tenon type long batten
FIG. 8 is a schematic view of a double dovetail tenon type wood pin
FIG. 9 Structure of double dovetail tenon type wooden Pin
FIG. 10 schematic diagram of dovetail joint large-section hollow wood prism assembly
FIG. 11 dovetail joint large section hollow wood prism blank
FIG. 12 dovetail joint large section hollow wood prism cold pressing glue principle diagram
In FIGS. 4, 5, 6 and 11, α is an included angle between two inclined side surfaces of the isosceles trapezoidal section unit bodies, and D is a diameter of an inscribed cylinder of the large-section hollow wood prism
Detailed Description
The following description will further describe the embodiments of the present invention with reference to fig. 1 to 12.
A dovetail-connected large-section hollow wood prism with the length of 3100mm and the diameter of an inscribed cylinder of more than 400mm is manufactured by using small-diameter wood with the diameter of 150 mm-160 mm, and the dovetail-connected large-section hollow wood prism comprises the following steps:
step 1: preparing small-diameter wood sections: selecting small-diameter log with good roundness, straight length direction and 150-160 mm diameter, and cutting into small-diameter log sections with 3100mm length.
Step 2: sawing small-diameter wood sections: a multi-saw-blade circular sawing machine is adopted to process the small-diameter wood sections into two rough edge plates with the thickness of 66mm and the side surfaces with the cylindrical surfaces reserved according to the bilateral symmetry principle at one time.
And step 3: trimming the rough edge plate: adopt two saw blade trimming circular sawing machines to carry out the edging to the both sides of deckle edge board, process out the side of perpendicular to bottom surface, the panel bottom surface width after the edging is 132mm, but the side remains partial face of cylinder.
And 4, step 4: drying the edge-flush plate: the board after edge alignment is naturally dried and then is forcibly dried, and the edge alignment board is dried to the water content of 12-15%.
And 5: drying and edging the plate, and performing finish machining: and (3) finely processing the bottom surface and the top surface of the dried flush edge plate by using a double-sided woodworking planer to obtain an equal-thickness plate with the thickness of 60mm, wherein a part of cylindrical surface can be remained between the vertical side surface and the top surface.
Step 6: preparing an isosceles trapezoid section unit body: adopting a double-sided woodworking milling machine with an inclinable cutter shaft to finely machine the left side and the right side of the constant-thickness finely machined equal-thickness plate, machining two inclined side surfaces which are bilaterally symmetrical to obtain an isosceles trapezoid cross-section unit body, wherein the width of the bottom surface of the isosceles trapezoid cross-section unit body is 120mm, the thickness of the bottom surface of the isosceles trapezoid cross-section unit body is 60mm, a part of cylindrical surface can still be remained between the inclined side surfaces and the top surface, and the inclined side surfaces of the isosceles trapezoid cross-section unit body are positioned between the two inclined side surfacesThe included angle alpha is determined according to the diameter D of an inscribed cylinder of a hollow regular polygon wood prism formed by unit bodies with isosceles trapezoid cross sections, and the mathematical relationship between alpha and D is
D is more than 400 mm; such as:
D＝447.85mm，α＝30°；
D＝564.56mm，α＝24°；
D＝603.28mm，α＝22.5°；
D＝680.55mm，α＝20°；
D＝757.65mm，α＝18°；
D＝911.49mm，α＝15°；
D＝1141.72mm，α＝12°。
and 7: the isosceles trapezoid section unit body with the dovetail mortises is prepared: dovetail mortises are processed on two inclined side surfaces of the unit body with the isosceles trapezoid cross section by adopting a special double-end dovetail mortising machine which can be obliquely adjusted with a dovetail milling cutter and a cutter shaft, the dovetail milling cutter moves towards the middle from two ends of the unit body with the isosceles trapezoid cross section along the length direction parallel to the unit body with the isosceles trapezoid cross section, the axis of the dovetail milling cutter is vertical to the inclined side surfaces of the unit body with the isosceles trapezoid cross section, the bottom surface of the dovetail mortises is parallel to the inclined side surfaces of the unit body with the isosceles trapezoid cross section, 4 dovetail grooves are processed on each isosceles trapezoid cross-section unit body, the distance from the open end of each dovetail groove to the circle center of the circular arc closed section is 300mm, the length of the bottom surface of each dovetail groove is 309.5mm, the width of the bottom surface of each dovetail groove is 19mm, the depth of each dovetail groove is 10mm, the included angle between the two side surfaces of each dovetail groove is 28 degrees, and the center line of each dovetail groove is parallel to the bottom surface edge of each isosceles trapezoid cross-section unit body and the distance of each dovetail groove is 30 mm.
And 8: processing the double-dovetail tenon-shaped long wood strips: symmetrical V-shaped grooves are simultaneously processed on two vertical side surfaces of a rectangular-section batten with the width of 19mm, the height of 20mm and the length of more than 950mm by adopting a double-sided horizontal milling machine and a horizontally arranged tapered shank milling cutter, two inclined side surfaces of each V-shaped groove respectively pass through an upper edge and a lower edge of the rectangular-section batten, and an included angle between the two inclined side surfaces of each V-shaped groove is 152 degrees, so that the double-dovetail tenon-shaped long batten is obtained.
And step 9: preparing the double-dovetail tenon-shaped short wood strips: and cutting the double-dovetail-tenon-shaped long battens into double-dovetail-tenon-shaped short battens with the length of 309.5mm by using a circular saw.
Step 10: preparing a double-dovetail tenon-shaped wood pin: adopt vertical milling machine and V-arrangement milling cutter, the contained angle of V-arrangement milling cutter cutting edge is 152, the semicircle motion is done at the one end of the short stuff strip of two forked tail tenon shape to the axis of V-arrangement milling cutter, the centre of a circle of semicircle motion is located the central line of the short stuff strip length direction of two forked tail tenon shapes, and be 300mm with the distance between the short stuff strip other end of two forked tail tenon shapes, the cross-sectional profile of V-arrangement milling cutter coincides with the V-arrangement groove of the short stuff both sides of two forked tail tenon shapes, process into the semicircle with the one end of the short stuff strip of two forked tail tenon shapes, the cross-sectional shape of semicircle end is unanimous with the V-arrangement groove of side, obtain two forked tail tenon shape stuff dowels, the length of two forked tail tenon shape stuff dowels is 309.5 mm.
Step 11: sizing the isosceles trapezoid section unit bodies with dovetail mortises: applying a melamine adhesive to one side surface of the unit body with the trapezoidal section by adopting a roller coating method, wherein the single-side adhesive application amount is 150g/m2～170g/m2(ii) a And simultaneously, gluing the inner surface of the dovetail groove by using a brush.
Step 12: dovetail joint's hollow wooden prism group of big section: according to the formula
Calculating the number n of isosceles trapezoid section unit bodies with dovetail mortises required by forming a hollow wood prism with an internally tangent cylinder diameter D, such as:
D＝447.85mm，α＝30°，n＝12；
D＝564.56mm，α＝24°，n＝15；
D＝603.28mm，α＝22.5°，n＝16；
D＝680.55mm，α＝20°，n＝18；
D＝757.65mm，α＝18°，n＝20；
D＝911.49mm，α＝15°，n＝24；
D＝1141.72mm，α＝12°，n＝30；
then arranging and assembling the components according to the structural requirements of the hollow regular polygon wood prism; when assembling, firstly splicing the opposite inclined side surfaces of the 1 st and the 2 nd isosceles trapezoid cross-section unit bodies with dovetail mortises together to align the dovetail mortises on the two corresponding inclined side surfaces to form double dovetail mortises, then respectively inserting the arc ends of the double dovetail tenon-shaped wood pins into the aligned double dovetail rabbet from the two ends, and inserting the whole double dovetail tenon-shaped wood pins into the double dovetail mortises, thereby connecting the two isosceles trapezoid cross-section unit bodies with dovetail mortises together; connecting the 3 rd isosceles trapezoid cross-section unit body with the dovetail mortises to the 2 nd isosceles trapezoid cross-section unit body with the dovetail mortises by using double dovetail tenon-shaped wood pins; by parity of reasoning, the (n-1) th isosceles trapezoid cross-section unit body with the dovetail mortises is connected to the (n-2) th isosceles trapezoid cross-section unit body with the dovetail mortises by double dovetail tenon-shaped wood pins; and finally, connecting the nth unit body with the isosceles trapezoid cross section of the dovetail mortise with the (n-1) th and 1 st unit bodies with the isosceles trapezoid cross section of the dovetail mortise by adopting a double-dovetail tenon-shaped wood pin, and finishing assembly to obtain the dovetail joint large-section hollow wood prism blank.
Step 13: cold-pressing and gluing the large-section hollow wood prism: and bundling the large-section hollow wood prism blank assembled in a dovetail joint mode by using a binding belt, tightening and pressurizing, performing cold pressing gluing, placing for 24 hours, finishing cold pressing, and removing the binding belt to obtain the dovetail joint large-section hollow wood prism with the length of 3100mm and the diameter of an inscribed cylinder larger than 400 mm.
Through trial production verification, adopt the method preparation's big hollow wooden prism group of section convenient and fast, the group precision is high, timber loss is little, the bonding performance is good, bearing capacity is strong, can satisfy the operation requirement of dovetail connection.
Claims (3)
1. The utility model provides a big section hollow wooden prism of dovetail connection with path wood preparation which characterized in that: the outer contour of the cross section of the dovetail joint large-section hollow wood prism is a regular polygon, and the dovetail joint large-section hollow wood prism is composed of a plurality of hollow wood prisms with the same structureThe isosceles trapezoid cross section unit body with the dovetail mortises is formed by connecting and assembling a blank by double dovetail tenon-shaped wood pins and performing cold pressing gluing after the inclined side surfaces and the inner surfaces of the dovetail mortises are glued; the isosceles trapezoid cross-section unit body with the dovetail mortises is 3100mm in length, 120mm in width at the bottom and 60mm in thickness, and partial cylindrical surfaces can be reserved between the inclined side surfaces and the top surface; the diameter D of the inner tangent cylinder of the dovetail joint large-section hollow wood prism depends on the number n of the required isosceles trapezoid section unit bodies with dovetail grooves,
the included angle alpha between the two inclined side surfaces of the isosceles trapezoid cross-section unit bodies with the dovetail mortises depends on the number n of the isosceles trapezoid cross-section unit bodies required by the large-section hollow wood prism,
2. the large-section hollow wood prism with dovetail joint made of small-diameter wood according to claim 1, characterized in that: dovetail mortise be located on two slope sides of isosceles trapezoid cross section cell cube, total 4, respectively near the both ends of isosceles trapezoid cross section cell cube, the one end of dovetail mortise is at the terminal surface upper shed of isosceles trapezoid cross section cell cube, the other end is the semicircle blind end, the bottom surface and the slope side in dovetail mortise are parallel, the distance of the open end to the circular arc enclosed segment centre of a circle of every dovetail mortise is 300mm, the bottom surface length of dovetail mortise is 309.5mm, the bottom surface width is 19mm, the dovetail mortise degree of depth is 10mm, contained angle between the dovetail mortise both sides face is 28, dovetail rabbet central line is parallel and the distance is 30mm with the bottom surface edge of isosceles trapezoid cross section cell cube.
3. The large-section hollow wood prism with dovetail joint made of small-diameter wood according to claim 1, characterized in that: one end of the double-dovetail tenon-shaped wooden pin is a flat end, the other end of the double-dovetail tenon-shaped wooden pin is a semi-arc end, the distance from the flat end to the center of the semi-arc end is 300mm, the total length of the double-dovetail tenon-shaped wooden pin is 309.5mm, the thickness of the double-dovetail tenon-shaped wooden pin is 20mm, the width of the double-dovetail tenon-shaped wooden pin is 19mm, two sides of the double-dovetail tenon-shaped wooden pin are symmetrical V-shaped grooves, and the included angle between the two side surfaces of each V-shaped groove is 152 degrees.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023037970.9U CN214394558U (en) | 2020-12-16 | 2020-12-16 | Dovetail joint large-section hollow wood prism made of small-diameter wood |
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| CN202023037970.9U CN214394558U (en) | 2020-12-16 | 2020-12-16 | Dovetail joint large-section hollow wood prism made of small-diameter wood |
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