Bamboo material-based fiddlestick and processing technology thereof

Abstract

The invention relates to the technical field of musical instrument materials and structures, in particular to a fiddlestick based on bamboo materials and a processing technology of the fiddlestick. The fiddlestick comprises a fiddlestick rod, a fiddlestick head, a horsetail box, fiddlestick hair and accessories, the bow rod is fixedly connected with the bow head; the horsetail box is mounted on the bow rod; the bow hairs are arranged between the bow head and the horsetail box; the bow rod and / or the bow head are / is formed by splicing and bonding a plurality of bamboo materials; the bamboo material is a bamboo block prepared by taking tea stem bamboos as a raw material; the density of the bamboo material is 0.75-0.85 g / cm < 3 >, the dynamic Young modulus is 1.2-2.0 * 10 < 11 > N / cm < 2 >, and the sound conduction speed at normal temperature and normal pressure is 11000-15000m / s; the fiddlestick adopts common tea-stem bamboos as raw materials, is low in cost, wide in source and excellent in performance (especially timbre), and is suitable for replacing a Brazilian sappan fiddlestick for large-scale application.

Description

Technical Field

[0001] The invention relates to the technical field of musical instrument materials and structures, and in particular to a violin bow based on bamboo material and a processing technology thereof. Background Art

[0002] Most traditional violin bows are made from a whole piece of Brazilian wood. The specific production method is: first cut the wood into a rectangular structure, then use a thumb planer to cut it into the basic shape of the violin bow, and finally install the silver wire leather cover, bow hair, cow bone pieces, cow horn pieces and other auxiliary structures to get a complete violin bow. However, at the 19th Conference of the Parties (CoP19) in November 2022, Brazilian wood was listed in the Convention on International Trade in Endangered Species of Wild Fauna and Flora for protection, which led to a significant reduction in the production of violin bows made of this material. In view of this, it is inevitable to use other materials to replace Brazilian wood to make violin bows. Among them, carbon fiber composite materials, Yunnan Su wood, green sandalwood and Bornango Su wood are the more common materials that can replace Brazilian wood to make violin bows, but in actual application, it is found that today's alternative materials have more or less certain defects. For example, although the performance and tone of violin bows made of carbon fiber composite materials are excellent, they are expensive and the production process is complicated; although the sources of Yunnan Sumu, Green Sandalwood and Bornango Sumu are not affected by current production, the performance and tone of the violin bows made from them are inferior to those of Brazilian Sumu.

[0003] In order to obtain a low-cost, sustainable source of violin bow material with excellent performance and tone, people have also proposed a technical solution to make violin bows from bamboo. Studies have shown that bamboo has many advantages as a violin bow material: the direction of bamboo fibers is extremely consistent, which is better than most high-grade woods; the microfibril angle of bamboo is between 7-13°, while the microfibril angle of most woods is around 25°, and the variation is large, so the Young's modulus of bamboo along the grain is much better than that of wood; the density of bamboo is relatively small, about 0.7-0.9 g / cubic centimeter; the texture of bamboo is straight and elastic, and it is not easy to deform after proper bending and shaping. The proper bending direction can keep the bending shape longer; therefore, the violin bow made of bamboo is not only strong, but also of appropriate weight. In addition, the solid bamboo bow rod material is uniform, and the center of gravity of the violin bow is clear, which is more suitable for violinists to operate and play music.

[0004] Patent announcement number CN202394517U discloses a bamboo-wood composite straight violin bow. The bamboo-wood composite straight violin bow in this scheme is composed of a straight bow rod made of bamboo-wood composite materials, horsetail bow hair, and a horsetail storage device at the bow root. It is a modern straight violin bow that takes into account the contribution of bamboo and wood materials to the timbre, increases the fullness of the violin timbre, and is more suitable for operation and performance. However, although the bamboo-wood composite straight violin bow can basically meet the various performance requirements of the violin bow, the bow structure is not adjusted and optimized according to the different manufacturing materials, resulting in a significantly lower timbre than the Brazilian wood bow, which is not conducive to the large-scale promotion and application of bamboo violin bows. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the existing bamboo violin bows, such as poor timbre and being unfavorable for large-scale promotion and application, and propose a violin bow based on bamboo material and a processing technology thereof.

[0006] The present invention provides a violin bow made of bamboo material, the violin bow comprising a bow rod, a bow head, a horsetail box, bow hair and accessory parts; the bow rod is fixedly connected to the bow head; the horsetail box is installed on the bow rod; the bow hair is arranged between the bow head and the horsetail box; the bow rod and / or the bow head are formed by splicing and gluing a plurality of bamboo materials; The bamboo material is a bamboo block made from tea stalk bamboo; and the density of the bamboo material is 0.75-0.85g / cm 3 , the dynamic Young's modulus is 1.2-2.0×10 11 N / cm 2 The sound conduction speed at normal temperature and pressure is 11000-15000m / s.

[0007] The invention discloses a violin bow based on bamboo material, which uses tea-stem bamboo material with specific density, dynamic Young's modulus and speed of sound as the material of the bow rod and / or bow head. It not only utilizes the characteristics that bamboo fibers of tea-stem bamboo are uniform in thickness and compactly arranged, have high density, and have moderate toughness and rigidity, which are very beneficial to the vibration and sound generation of the violin bow and the propagation of sound, but also significantly improves the timbre performance of the violin bow. At the same time, the timbre of the violin bow is further improved through targeted selection of material density, dynamic Young's modulus and speed of sound. The violin bow uses common tea-stem bamboo as raw material, has low cost, wide source and excellent performance (especially timbre), and is suitable for replacing Brazilian wood violin bows for large-scale application.

[0008] Preferably, the dynamic Young's modulus of the bamboo material is 1.4-1.8×10 11 N / cm 2 ; The sound conduction speed at normal temperature and pressure is 12000-13000m / s; The preferred bamboo material performance has better timbre.

[0009] Among them, preferably, the width of the bamboo material is 0.8-1.2 cm, the thickness is greater than 2.75 mm, and the length is greater than 73 cm; the preferred size of the bamboo material is convenient for later processing and has higher processing efficiency.

[0010] Among them, preferably, the water content of the bamboo material is 0.85-1.2%; the water content directly affects the various properties of the bamboo material, and the preferred water content makes the bamboo material have a better tone.

[0011] Among them, preferably, the taper of the bow rod is 5.5-8.3°; the preferred taper is adapted to the material and has a better tone.

[0012] Preferably, the length of the bow rod is 73 cm and the maximum diameter is 8.3 mm.

[0013] Among them, preferably, the bow rod is made of six pieces of bamboo materials with equilateral triangle cross-sections spliced ​​and glued together, or is made of eight pieces of isosceles triangle bamboo materials with a vertex angle of 45° spliced ​​and glued together; through the preferred splicing method, the sound propagation speed and vibration frequency in the bow rod can be made more stable and uniform, thereby significantly improving the timbre and mechanical properties of the bow.

[0014] Preferably, the bow rod is divided into a top portion, a middle portion and a tail portion; and the cross section of the bow rod is circular, a regular hexagon or a regular octagon.

[0015] Among them, preferably, the bow head is made of several layers of bamboo material stacked, bonded and hot-pressed; the preferred bonding method is easy to produce without affecting the performance of the bow.

[0016] Among them, preferably, the bow head and the top of the bow rod are provided with matching tenons, and the tenons are provided in the tenons, and the tenons cooperate with the tenons to fix the bow head to the top of the bow rod; the preferred connection method has a stronger connection between the bow head and the bow rod, better sound conductivity, and is conducive to improving the timbre of the bow.

[0017] Preferably, a bow hair mounting hole is provided on the bow head for mounting the bow hair.

[0018] Preferably, a tail box mounting groove and a fastening hole are provided at the tail end of the bow rod, a fastener is installed in the fixing hole, the tail box mounting groove is used for installing the tail box, the fastening hole is connected with the tail box mounting groove, and the fastener is used for fastening the tail box; preferably, the fastener is an adjusting screw.

[0019] Preferably, the accessory parts include cow bone pieces, cow horn pieces and silver leather sheaths; the cow bone pieces and cow horn pieces are installed on the bow head; the silver leather sheath is installed at one end of the middle part of the bow rod close to the tail.

[0020] In order to achieve the above object, the present invention further provides a processing technology for a violin bow based on bamboo material, comprising the following steps: S1, processing the bamboo material into a required shape and size, then splicing and gluing, and performing curvature shaping treatment, after the shaping is completed, performing taper processing to obtain a bow rod blank; stacking and hot pressing the bamboo material, and processing and forming to obtain a bow head blank; S2, machining a tenon groove, a horsetail box mounting groove and a fastening hole on the bow rod rough blank to obtain a bow rod; machining a tenon groove and a bow hair mounting hole on the bow head rough blank to obtain a bow head; S3, using bamboo material to process into tenon pieces, using the tenon pieces to fix the bow head on the bow rod through the tenon grooves, to obtain a rough blank of the bow; S4. After the cow bone piece and the cow horn piece are installed on the bow head of the rough bow, the surface is painted; S5. Install the silver leather cover, horsetail box and bow hair on the painted rough bow to obtain the bow.

[0021] The processing method of the violin bow of the present invention can better eliminate the stress generated when each bamboo strip in the bow stick is bent by performing a qualitative curvature treatment on the bow stick by adopting a splicing plastic method, thereby significantly improving the recovery and durability of the bow stick, and is more conducive to the large-scale promotion and use of violin bows. The processing method of the present invention is simple and reliable, and is suitable for the large-scale production of violin bows made of bamboo materials.

[0022] Wherein, in step S1, preferably, when the bow rod blanks are spliced ​​and bonded, the adhesive is resorcinol; resorcinol has a good bonding effect, and is also resistant to high temperature, waterproof and corrosion.

[0023] Preferably, the specific method of curvature shaping treatment is: placing the spliced ​​bow rod with uncured adhesive in a curvature workpiece mold for shaping; shaping during splicing can eliminate the stress generated when each bamboo strip is bent, greatly improving the recovery and durability of use, thereby increasing its practical life and reducing maintenance costs, and the performance is stable and reliable.

[0024] Preferably, the curvature of the bow rod is the same as that of an existing violin bow; preferably, the bending radius is 20-30 cm.

[0025] Preferably, when the bow head blanks are stacked and hot-pressed, the adhesive is resorcinol, the hot-pressing temperature is 90-95°C, the time is 45-55h, and the pressure is 1.5-3×10 7 N; Optimized hot pressing conditions, better hot pressing effect, and better bow head rough blank performance.

[0026] Among them, in step S4, wood wax oil is used for surface coating; it is a consumable surface coating to prevent the bow from being corroded by the sweat of the performer's hands during the performance.

[0027] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention is a bamboo-based violin bow, which uses tea-stem bamboo material with specific density, dynamic Young's modulus and speed of sound as the material of the bow rod and / or bow head, so that the timbre performance of the violin bow is significantly improved.

[0028] 2. The bamboo-based bow of the present invention improves the timbre of the bow through targeted selection of material density, dynamic Young's modulus and speed of sound.

[0029] 3. The bamboo-based violin bow of the present invention adopts common tea-stem bamboo as raw material, which has low cost, wide source and excellent performance (especially tone quality), and is suitable for replacing Brazilian wood violin bows for large-scale application.

[0030] 4. The processing technology of a violin bow based on bamboo material of the present invention can better eliminate the stress generated when each bamboo strip in the bow is bent by qualitatively processing the curvature of the bow rod by adopting a splicing plastic method, thereby significantly improving the recovery and durability of the bow rod, which is more conducive to the large-scale promotion and use of violin bows. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 Schematic diagram of the structure of the bow in Embodiment 1 of the present invention; Figure 2 Schematic diagram of the structure of the tail end of the bow rod of the violin bow in embodiment 1 of the present invention; Figure 3 Schematic diagram of the cross section of the middle part of the bow rod of the violin bow in embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the connection between the bow rod and the bow head in Example 1 of the present invention; Figure 5 is a schematic structural diagram of a bow head in Embodiment 1 of the present invention; Figure numerals: 1-bow rod, 101-horsetail box mounting slot, 102-fastening hole, 2-bow head, 201-bow hair mounting hole, 3-horsetail box, 4-bow hair, 5-silver leather case, 6-fastener, 7-mortise and tenon, 8-tenon piece, 9-ox horn piece, 10-ox bone piece, 11-bamboo block (bamboo material). DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0032] Example 1 A bamboo-based bow ( Figure 1 ), mainly composed of bow rod 1 ( Figure 2)、Bowhead 2( Figure 5 ), horsetail box 3, bow hair 4 and accessory parts (cow bone piece 10, cow horn piece 9 and silver wire leather case 5); the bow rod 1 is fixedly connected with the bow head 2 ( Figure 4 ), the bow head 2 and the top of the bow rod 1 are provided with matching mortise grooves 7, and the mortise grooves 7 are provided with matching tenons 8, and the tenons 8 cooperate with the mortise grooves 7 to fix the bow head 2 to the top of the bow rod 1; the horsetail box 3 is installed on the bow rod 1; the bow hair 4 is arranged between the bow head 2 and the horsetail box 3; the taper of the bow rod 1 is 6.3°; the bow rod 1 is made of six pieces of bamboo materials with equilateral triangle cross-sections spliced ​​and glued together ( Figure 3 ), the bow rod 1 is divided into a top, a middle and a tail, and the cross section of the bow rod 1 is a regular hexagon; the bow head 2 is formed by stacking, gluing and hot pressing a plurality of layers of bamboo materials; the bow head 2 is provided with a bow hair installation hole 201 for installing the bow hair 4; the tail of the bow rod 1 is provided with a horsetail box installation groove 101 and a fastening hole 102, and a fastener 6 is installed in the fixing hole, the horsetail box installation groove 101 is used for installing the horsetail box 3, the fastening hole 102 is connected with the horsetail box installation groove 101, and the fastener 6 is used for fastening the horsetail box 3; The bamboo material is a bamboo block made from tea stalk bamboo, with a water content of 1.05%; and the density of the bamboo material is 0.80g / cm 3 , the dynamic Young's modulus is 1.5×10 11 N / cm 2 , the speed of sound transmission at normal temperature and pressure is 13000m / s; The specific processing technology includes the following steps: S1. Process the bamboo material into the required shape and size, then splice and bond (resorcinol), and perform curvature shaping treatment (the spliced ​​bow rod with uncured adhesive is placed in the curvature workpiece mold for shaping, and the bending radius is 25 cm). After the shaping is completed, taper processing is performed to obtain a rough bow rod blank; stack the bamboo material for hot pressing treatment (resorcinol, hot pressing temperature is 93 ° C, time is 48 h, pressure is 2×10 7 N), and process and shape to obtain a bow head rough blank; S2, machining a tenon groove, a horsetail box mounting groove and a fastening hole on the bow rod rough blank to obtain a bow rod; machining a tenon groove and a bow hair mounting hole on the bow head rough blank to obtain a bow head; S3, using bamboo material to process into tenon pieces, using the tenon pieces to fix the bow head on the bow rod through the tenon grooves, to obtain a rough blank of the bow; S4. After installing the cow bone piece and the cow horn piece on the bow head of the rough bow, apply surface coating (wood wax oil); S5. Install the silver leather cover, horsetail box and bow hair on the painted rough bow to obtain the bow.

[0033] Example 2 A violin bow made of bamboo material, mainly composed of a bow rod 1, a bow head 2, a horsetail box 3, bow hair 4 and accessory parts (cow bone piece 10, cow horn piece 9 and silver wire leather cover 5); the bow rod 1 is fixedly connected to the bow head 2, and the bow head 2 and the top of the bow rod 1 are provided with matching mortise grooves 7, and the mortise grooves 7 are provided with matching tenons 8, and the tenons 8 cooperate with the tenon grooves 7 to fix the bow head 2 on the top of the bow rod 1; the horsetail box 3 is installed on the bow rod 1; the bow hair 4 is arranged between the bow head 2 and the horsetail box 3; the taper of the bow rod 1 is 5.5°; the bow rod 1 consists of eight sections The bow rod 1 is made of bamboo materials of isosceles triangles spliced ​​and bonded, and is divided into a top, a middle and a tail, and the cross section of the bow rod 1 is a regular octagon; the bow head 2 is made of several layers of bamboo materials stacked, bonded and hot-pressed; a bow hair mounting hole 201 is provided on the bow head 2 for mounting the bow hair 4; a horsetail box mounting groove 101 and a fastening hole 102 are provided at the tail of the bow rod 1, and a fastener 6 is installed in the fixing hole, the horsetail box mounting groove 101 is used for mounting the horsetail box 3, the fastening hole 102 is connected to the horsetail box mounting groove 101, and the fastener 6 is used for fastening the horsetail box 3; The bamboo material is a bamboo block made from tea stalk bamboo, with a water content of 1.2%; and the density of the bamboo material is 0.75g / cm 3 , the dynamic Young's modulus is 2.0×10 11 N / cm 2 , the speed of sound transmission at normal temperature and pressure is 11000m / s; The specific processing technology includes the following steps: S1. Process the bamboo material into the required shape and size, then splice and bond (resorcinol), and perform curvature shaping treatment (the spliced ​​bow rod with uncured adhesive is placed in the curvature workpiece mold for shaping, and the bending radius is 25 cm). After the shaping is completed, taper processing is performed to obtain the bow rod blank; stack the bamboo material for hot pressing treatment (resorcinol, hot pressing temperature is 95 ° C, time is 45 h, pressure is 1.5×10 7 N), and process and shape to obtain a bow head rough blank; S2, machining a tenon groove, a horsetail box mounting groove and a fastening hole on the bow rod rough blank to obtain a bow rod; machining a tenon groove and a bow hair mounting hole on the bow head rough blank to obtain a bow head; S3, using bamboo material to process into tenon pieces, using the tenon pieces to fix the bow head on the bow rod through the tenon grooves, to obtain a rough blank of the bow; S4. After installing the cow bone piece and the cow horn piece on the bow head of the rough bow, apply surface coating (wood wax oil); S5. Install the silver leather cover, horsetail box and bow hair on the painted rough bow to obtain the bow.

[0034] Example 3 A violin bow made of bamboo material, mainly composed of a bow rod 1, a bow head 2, a horsetail box 3, bow hair 4 and accessory parts (cow bone piece 10, cow horn piece 9 and silver wire leather cover 5); the bow rod 1 is fixedly connected to the bow head 2, and the bow head 2 and the top of the bow rod 1 are provided with matching mortise grooves 7, and the mortise grooves 7 are provided with matching tenons 8, and the tenons 8 cooperate with the tenon grooves 7 to fix the bow head 2 on the top of the bow rod 1; the horsetail box 3 is installed on the bow rod 1; the bow hair 4 is arranged between the bow head 2 and the horsetail box 3; the taper of the bow rod 1 is 8.3°; the bow rod 1 consists of eight sections The bow rod 1 is made of bamboo materials of isosceles triangles spliced ​​and bonded, and is divided into a top, a middle and a tail, and the cross section of the bow rod 1 is a regular octagon; the bow head 2 is made of several layers of bamboo materials stacked, bonded and hot-pressed; a bow hair mounting hole 201 is provided on the bow head 2 for mounting the bow hair 4; a horsetail box mounting groove 101 and a fastening hole 102 are provided at the tail of the bow rod 1, and a fastener 6 is installed in the fixing hole, the horsetail box mounting groove 101 is used for mounting the horsetail box 3, the fastening hole 102 is connected to the horsetail box mounting groove 101, and the fastener 6 is used for fastening the horsetail box 3; The bamboo material is a bamboo block made from tea stalk bamboo, with a water content of 0.85%; and the density of the bamboo material is 0.85g / cm 3 , the dynamic Young's modulus is 1.2×10 11 N / cm 2 , the speed of sound transmission at normal temperature and pressure is 15000m / s; The specific processing technology includes the following steps: S1. Process the bamboo material into the required shape and size, then splice and bond (resorcinol), and perform curvature shaping treatment (the spliced ​​bow rod with uncured adhesive is placed in the curvature workpiece mold for shaping, and the bending radius is 25 cm). After the shaping is completed, taper processing is performed to obtain a rough bow rod blank; stack the bamboo material for hot pressing treatment (resorcinol, hot pressing temperature is 90 ° C, time is 55 h, pressure is 3×10 7 N), and process and shape to obtain a bow head rough blank; S2, machining a tenon groove, a horsetail box mounting groove and a fastening hole on the bow rod rough blank to obtain a bow rod; machining a tenon groove and a bow hair mounting hole on the bow head rough blank to obtain a bow head; S3, using bamboo material to process into tenon pieces, using the tenon pieces to fix the bow head on the bow rod through the tenon grooves, to obtain a rough blank of the bow; S4. After installing the cow bone piece and the cow horn piece on the bow head of the rough bow, apply surface coating (wood wax oil); S5. Install the silver leather cover, horsetail box and bow hair on the painted rough bow to obtain the bow.

[0035] Example 4 A violin bow made of bamboo material, mainly composed of a bow stick 1, a bow head 2, a horsetail box 3, bow hair 4 and accessory parts (cow bone piece 10, cow horn piece 9 and silver wire leather case 5); the bow stick 1 and the bow head 2 are bonded by glue; the horsetail box 3 is installed on the bow stick 1; the bow hair 4 is arranged between the bow head 2 and the horsetail box 3; the taper of the bow stick 1 is 6.3°; the bow stick 1 is made of eight pieces of bamboo material with isosceles triangle cross-sections spliced ​​and bonded, and the bow stick 1 is divided into a top, a middle and a bottom. The cross section of the bow rod 1 is circular; the bow head 2 is formed by stacking, gluing and hot pressing several layers of bamboo materials; the bow head 2 is provided with a bow hair installation hole 201 for installing the bow hair 4; the tail of the bow rod 1 is provided with a horsetail box installation groove 101 and a fastening hole 102, and a fastener 6 is installed in the fixing hole, the horsetail box installation groove 101 is used for installing the horsetail box 3, the fastening hole 102 is connected with the horsetail box installation groove 101, and the fastener 6 is used for fastening the horsetail box 3; The bamboo material is a bamboo block made from tea stalk bamboo, with a water content of 0.95%; and the density of the bamboo material is 0.80g / cm 3 , the dynamic Young's modulus is 1.5×10 11 N / cm 2 , the speed of sound transmission at normal temperature and pressure is 13000m / s; The specific processing technology includes the following steps: S1. Process the bamboo material into the required shape and size, then splice and bond (resorcinol), and perform curvature shaping treatment (the spliced ​​bow rod with uncured adhesive is placed in the curvature workpiece mold for shaping, with a bending radius of 25 cm). After the shaping is completed, rounding and taper processing are performed to obtain a rough bow rod blank; stack the bamboo material for hot pressing treatment (resorcinol, hot pressing temperature is 93°C, time is 48h, pressure is 2×10 7 N), and process and shape to obtain a bow head rough blank; S2, processing a horsetail box mounting groove and a fastening hole on the bow rod rough blank to obtain a bow rod; processing a bow hair mounting hole on the bow head rough blank to obtain a bow head; S3, using glue (resorcinol) to fix the bow head on the bow rod to obtain a rough bow; S4. After installing the cow bone piece and the cow horn piece on the bow head of the rough bow, apply surface coating (wood wax oil); S5. Install the silver leather cover, horsetail box and bow hair on the painted rough bow to obtain the bow.

[0036] Example 5 A violin bow made of bamboo material, mainly composed of a bow rod 1, a bow head 2, a horsetail box 3, bow hair 4 and accessory parts (cow bone piece 10, cow horn piece 9 and silver wire leather cover 5); the bow rod 1 is fixedly connected to the bow head 2, and the bow head 2 and the top of the bow rod 1 are provided with matching mortise grooves 7, and the mortise grooves 7 are provided with matching tenons 8, and the tenons 8 cooperate with the tenon grooves 7 to fix the bow head 2 to the top of the bow rod 1; the horsetail box 3 is installed on the bow rod 1; the bow hair 4 is arranged between the bow head 2 and the horsetail box 3; the taper of the bow rod 1 is 6.3°; the bow rod 1 is composed of six pieces of bamboo The bow rod 1 is formed by stacking, splicing and gluing bamboo materials (sheets), the bow rod 1 is divided into a top, a middle and a tail, and the cross section of the bow rod 1 is a regular hexagon; the bow head 2 is formed by stacking, gluing and hot pressing a plurality of layers of bamboo materials; the bow head 2 is provided with a bow hair installation hole 201 for installing the bow hair 4; the tail of the bow rod 1 is provided with a horsetail box installation groove 101 and a fastening hole 102, a fastener 6 is installed in the fixing hole, the horsetail box installation groove 101 is used for installing the horsetail box 3, the fastening hole 102 is connected with the horsetail box installation groove 101, and the fastener 6 is used for fastening the horsetail box 3; The bamboo material is a bamboo block made from tea stalk bamboo, with a water content of 0.95%; and the density of the bamboo material is 0.80g / cm 3 , the dynamic Young's modulus is 1.5×10 11 N / cm 2 , the speed of sound transmission at normal temperature and pressure is 13000m / s; The specific processing technology includes the following steps: S1. Process the bamboo material into the required shape and size, then splice and bond (resorcinol), and perform curvature shaping treatment (the spliced ​​bow rod with uncured adhesive is placed in the curvature workpiece mold for shaping, with a bending radius of 25 cm). After the shaping is completed, perform hexagonal and taper processing to obtain a rough bow rod blank; stack the bamboo material for hot pressing treatment (resorcinol, hot pressing temperature of 93 ° C, time of 48 h, pressure of 2 × 10 7 N), and process and shape to obtain a bow head rough blank; S2, machining a tenon groove, a horsetail box mounting groove and a fastening hole on the bow rod rough blank to obtain a bow rod; machining a tenon groove and a bow hair mounting hole on the bow head rough blank to obtain a bow head; S3, using bamboo material to process into tenon pieces, using the tenon pieces to fix the bow head on the bow rod through the tenon grooves, to obtain a rough blank of the bow; S4. After installing the cow bone piece and the cow horn piece on the bow head of the rough bow, apply surface coating (wood wax oil); S5. Install the silver leather cover, horsetail box and bow hair on the painted rough bow to obtain the bow.

[0037] Comparative Example 1 The bow structure and processing method are exactly the same as those in Example 1, except that the bamboo material is a bamboo block made of tea bamboo with a water content of 0.75%; and the density of the bamboo material is 0.73 g / cm 3 , the dynamic Young's modulus is 1.35×10 11 N / cm 2 The speed of sound transmission at normal temperature and pressure is 9500m / s.

[0038] Comparative Example 2 The bow structure and processing method are exactly the same as those in Example 1, except that the bamboo material is a bamboo block made of tea bamboo with a water content of 1.25%; and the density of the bamboo material is 0.86 g / cm 3 , the dynamic Young's modulus is 1.25×10 11 N / cm 2 The speed of sound transmission at normal temperature and pressure is 15500m / s.

[0039] Comparative Example 3 The bow structure and processing method are exactly the same as those in Example 1, except that the bamboo material is a bamboo block made of green bamboo with a water content of 0.88%; and the density of the bamboo material is 0.76 g / cm 3 , the dynamic Young's modulus is 1.25×10 11 N / cm 2 The speed of sound transmission at normal temperature and pressure is 11500m / s.

[0040] Comparative Example 4 The structure and material of the violin bow are exactly the same as those in Example 1, except that when processing the bow rod, the spliced ​​bow rod is placed in the arc workpiece mold for shaping only after the adhesive is cured.

[0041] Comparative Example 5 Regular Brazilian wood bow.

[0042] Experimental example: The violin bows prepared in Examples 1-5 and Comparative Examples 1-5 were evaluated on tone, feel and satisfaction, and the evaluation results are shown in Table 2; Evaluation method: The evaluation team is composed of 10 professional violinists. The 10 evaluators received two evaluation trainings before the evaluation. They scored the violin bows according to the evaluation criteria (taking the average value). The specific evaluation reference criteria are shown in Table 1 below: Table 1 Evaluation scoring criteria Evaluation results: Table 2 Bow evaluation score results Analysis of the above evaluation results shows that the bamboo-based violin bow of the present invention has excellent performance, is suitable for replacing the existing Brazilian wood violin bow, and is conducive to large-scale production and use.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A bamboo-based bow, characterized in that: The violin bow comprises a bow rod (1), a bow head (2), a horsetail box (3), bow hair (4) and accessory parts; the bow rod (1) is fixedly connected to the bow head (2); the horsetail box (3) is installed on the bow rod (1); the bow hair (4) is arranged between the bow head (2) and the horsetail box (3); the bow rod (1) and / or the bow head (2) are formed by splicing and gluing a plurality of bamboo materials; The bamboo material is a bamboo block (11) made from tea bamboo as raw material; and the density of the bamboo material is 0.75-0.85 g / cm 3 , the dynamic Young's modulus is 1.2-2.0×10 11 N / cm 2 The sound conduction speed at normal temperature and pressure is 11000-15000m / s.

2. The bow according to claim 1, characterized in that: The water content of the bamboo material is 0.85-1.2%.

3. The bow according to claim 1, characterized in that: The bow rod (1) is formed by splicing and gluing together six pieces of bamboo materials with equilateral triangle cross sections; or by splicing and gluing together eight pieces of bamboo materials with isosceles triangle cross sections with vertex angles of 45 degrees.

4. The bow according to claim 3, characterized in that: The bow rod (1) is divided into a top portion, a middle portion and a tail portion; the cross section of the bow rod (1) is circular, a regular hexagon or a regular octagon.

5. The bow according to claim 1, characterized in that: The bow head (2) and the top of the bow rod (1) are provided with matching tenon grooves (7), and a matching tenon piece (8) is provided in the tenon groove (7); the tenon piece (8) cooperates with the tenon groove (7) to fix the bow head (2) to the top of the bow rod (1).

6. The bow according to claim 1, characterized in that: The bow head (2) is provided with a bow hair mounting hole (201) for mounting the bow hair (4).

7. The bow according to claim 1, characterized in that: The tail of the bow rod (1) is provided with a horsetail box installation groove (101) and a fastening hole (102), a fastener (6) is installed in the fastening hole, the horsetail box installation groove (101) is used for installing the horsetail box (3), the fastening hole (102) is communicated with the horsetail box installation groove (101), and the fastener (6) is used for fastening the horsetail box (3).

8. The bow according to claim 1, characterized in that: The accessory parts include a cow bone piece (10), a cow horn piece (9) and a silver thread leather sheath (5).

9. A process for manufacturing a violin bow according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, processing the bamboo material into a required shape and size, then splicing and gluing, and performing curvature shaping treatment, after the shaping is completed, performing taper processing to obtain a bow rod blank; stacking and hot pressing the bamboo material, and processing and forming to obtain a bow head blank; S2, machining a tenon groove, a horsetail box mounting groove and a fastening hole on the bow rod rough blank to obtain a bow rod; machining a tenon groove and a bow hair mounting hole on the bow head rough blank to obtain a bow head; S3, using bamboo material to process into tenon pieces, using the tenon pieces to fix the bow head on the bow rod through the tenon grooves, to obtain a rough blank of the bow; S4. After the cow bone piece and the cow horn piece are installed on the bow head of the rough bow, the surface is painted; S5. Install the silver leather cover, horsetail box and bow hair on the painted rough bow to obtain the bow.

10. The processing technology of the violin bow according to claim 9, characterized in that: The specific method of the curvature shaping treatment is: placing the spliced ​​bow rod with uncured adhesive in the curvature workpiece mold for shaping.

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