CN112750413B - Method for manufacturing standardized mass-produced fiddle bow - Google Patents
Method for manufacturing standardized mass-produced fiddle bow Download PDFInfo
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- CN112750413B CN112750413B CN202011613471.1A CN202011613471A CN112750413B CN 112750413 B CN112750413 B CN 112750413B CN 202011613471 A CN202011613471 A CN 202011613471A CN 112750413 B CN112750413 B CN 112750413B
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10D—STRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR
- G10D3/00—Details of, or accessories for, stringed musical instruments, e.g. slide-bars
- G10D3/16—Bows; Guides for bows; Plectra or similar playing means
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10D—STRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR
- G10D3/00—Details of, or accessories for, stringed musical instruments, e.g. slide-bars
- G10D3/22—Material for manufacturing stringed musical instruments; Treatment of the material
Abstract
A manufacturing method of standardized and mass-produced fiddle bow belongs to the technical field of musical instruments. The method comprises the following steps: the method comprises the following steps: molding a bow rod front end piece; step two: processing a convex block and a blind hole and performing surface treatment on the front end piece of the bow rod; step three: forming and surface treating the rear end piece of the bow rod; step four: assembling the bow rod; step five: forming and surface treating a front tail warehouse and a rear tail warehouse; step six: assembling the front tail warehouse and the rear tail warehouse with the bow rod; step seven: and (5) assembling the fiddle bow. The fiddle bow manufactured by the method of the invention has the advantages of easy maintenance, high hardness, high modulus, light weight, acid and alkali resistance, stable performance at high temperature and high humidity, direct water washing and soaking cleaning of the whole fiddle bow, convenient replacement of bow hair, and no deformation of bow rod after long-term use. The invention is used for manufacturing fiddle bows.
Description
Technical Field
The invention belongs to the technical field of musical instruments, and particularly relates to a standardized and mass-production violin bow manufacturing method.
Background
The fiddle bow is an important component of a violin musical instrument and mainly comprises a bow rod, bow hair and a tail bank, wherein the bow hair is fixed at two ends of the bow rod, and the tension degree of the bow hair is changed by adjusting the position of the tail bank. The traditional wood violin bow is formed by hot roasting a whole stick with the length of about 70cm and the diameter of about 5-7mm by hands, and the wood material is poor in plasticity, adjustability, stability and weather resistance compared with a carbon fiber material, so that the quality standard and the quantification standard cannot be formed, and the batch quantification production cannot be achieved.
The bow stick is required to have the basic conditions of straightness, high elasticity, light weight, toughness (good bending strength) and the like so as to improve the playing effect. The bow also has moderate curvature, proper balance point, good elasticity, and coincidence of position center point and gravity center point, so that the player can perfectly express the emotion in the musical composition with the mind, but the traditional bow made of wood is difficult to stably achieve the above-listed performance. And receive influences such as temperature and humidity in the use, rigidity, elasticity, the bending that toasts the in-process timing and stereotype also can warp the outward appearance gradually, greatly influence the bow degree of controlling and comfort level. Therefore, the existing manually-manufactured wooden bow cannot well restore musical notes of the works, clearly show the works and stably express the original meanings of the works. The main problems that the existing traditional wood material fiddle bow has:
1. the high-quality raw materials are rare and the cost is high. The differences of the producing area, variety, growing soil, year, compactness and the like of each batch of wood have great influence on the lateral bending, rigidity, elasticity, weight and the like of the bow rod, and the cost of raw materials is gradually increased.
2. The preparation process before manufacturing is long and the productivity is low. The bow rod is formed by baking and manually pressing the raw materials of wood for a growth period of more than 10 years. The method comprises the steps of firstly carrying out drying treatment on wood through a plurality of procedures such as strong fire water expelling, small fire straightening, slow fire bending and the like, and then carrying out baking adjustment, cooling shaping and the like to shape the curvature and the bending degree of the bow stick. The bow swings left and right during playing, and the rigidity of the wood stick bow is low.
3. The manufacturing process has no quantitative index, and the high-quality product rate is low. Because the diameters of the wooden sticks are not uniform, the gravity center point and the rigidity position are not uniform. The increase of the diameter of the bow rod leads to the mass increase, and the change of the diameter position and the compactness of the wood determines the hardness and elasticity of the position and directly influences the playing effect. The wood fibre material determines that the bow rod must be formed in one piece, which reduces transverse stresses if spliced.
4. The fiddle bow is not easy to clean, maintain and preserve. After the fiddle bow is used for long-term playing, the fiddle hair is easy to stick sweat, grease and other sundries, the fiddle bow made of traditional wooden materials cannot be directly cleaned because the fiddle bow cannot be in contact with liquid, and only the fiddle bow can be simply cleaned by wet tissues. The wood material has poor weather resistance, higher requirements on temperature and humidity in the storage process, the wood material has the defects of water absorption, moisture absorption, mildew and the like, and the bow rod is easy to crack and damage and cannot keep the curvature for a long time until the bow rod cannot be used.
5. Low strength and short service life. The bow hair in the wooden material bow pole of tradition and the junction of bow body have stress concentration, and the intensity is weak, if draw high strength bent son and make very big strength, carelessly a little, the bow pole is cracked from the centre easily.
Disclosure of Invention
The invention aims to provide a manufacturing method of standardized and mass-produced fiddle bow, which overcomes the defects of the existing fiddle bow in material aspect, structure aspect and weather resistance.
The fiddle bow (hereinafter referred to as fiddle bow) manufactured by the method of the invention is a fiddle bow which can be produced in a standardized and standard way. The fiddle bow comprises a violin, a viola, a cello and a viola fiddle bow.
The method combines the violin sounding principle with the novel composite material, and combines the acoustic process of the traditional manual bow making with the carbon fiber, thereby improving the properties of the bow, such as strength, tensile strength, elasticity, stability and the like, on the premise of not changing the tone quality and the external shape of the traditional material bow; meanwhile, high volume production, high environmental protection, maintenance free, low cost and standardized volume production are achieved, and the carbon fiber becomes a novel material for replacing the traditional wooden fiddle bow.
The fiddle bow manufactured by the method of the invention has the advantages of flexible fiddle bow carrying, sensitive response, full pronunciation and easy control of volume and strength. Scientifically increasing the radian of the bow rod is more beneficial to the elasticity of the bow and is beneficial to a player to transmit the force to the strings; the carbon fiber piano rod improves the strength and weather resistance, the bow hair is not easy to break from the bow rod, and the bow rod cannot shake during playing; the bow head at the upper end of the bow rod is designed in a split type, so that a user can conveniently clean or replace bow hair.
1. The carbon fiber has wide raw material and low price.
2. Defining quantitative and materialization parameter indexes; establishing a digital model by performing 3D scanning on a mass top-level fiddle bow; and (4) performing analysis such as stress mechanics finite element analysis, establishing a standard database of the fiddle bow product, and forming a full-product series product line.
3. Standardized mass production; can make large-scale bow member carbon fiber shaping frock, can cut out hundreds of bow members after the big board solidification of a carbon fiber bow member, digit control machine tool processing keeps the precision. Through the carbon fiber layer design, the bow rod has large left and right stress and high rigidity during playing, and the left and right swinging phenomenon of the front end of the bow rod can not occur.
4. The performance is stable; the fiddle bow manufactured by the method of the invention has the advantages of easy maintenance, high hardness, high modulus, light weight, acid and alkali resistance, stable performance at high humidity and high temperature, and the whole fiddle bow can be directly washed and soaked for cleaning. The bow hair is convenient to replace, and the bow rod can be used for a long time without deformation.
In order to achieve the purpose, the invention adopts the technical scheme that:
a method of manufacturing standardized mass-producible fiddle bows, the method comprising the steps of:
the method comprises the following steps: molding a bow rod front end piece; the external shape of the bow rod front end piece is approximately a number '7', the front end of the bow rod front end piece is bent and tilted, and the section of the rear end of the bow rod front end piece is circular; the bow rod nose piece 1 is formed by the following steps: lay on bow pole front end spare shaping frock: the carbon fiber prepreg is 88mm in width and 650mm in length, the spreading height of the carbon fiber prepreg is front low and back high, the change range of the height from front to back is 4-5.5mm, the laying thickness of each layer of the carbon fiber prepreg is 0.1mm, and 40-55 layers are always laid; installing a high-temperature-resistant film bag on a bow rod front end piece forming tool, pumping negative pressure to 0.5-1.5MPa by using a vacuum nozzle, compacting the laid carbon fiber prepreg, putting the bow rod front end piece forming tool into a vacuum hot-pressing tank, heating to 90-180 ℃, pressurizing to 0.5-10MPa, and curing and forming the laid carbon fiber prepreg for 60-300 min; taking out the bow rod front part forming tool after the temperature in the vacuum hot pressing tank is reduced to 40-60 ℃, removing a high-temperature resistant film bag on the bow rod front part forming tool, taking down a cured and formed carbon fiber prepreg plate, cutting the carbon fiber prepreg plate into carbon fiber strips with the width of 6.5mm, the length of 580mm and the same variation range of the layer height of the carbon fiber prepreg, and finally trimming the carbon fiber strips into carbon fiber cylinders with the length of 570mm and the diameter of 3.5-5.0mm along the plane direction of the carbon fiber strips;
step two: processing a convex block and a blind hole and performing surface treatment on the front end piece of the bow rod; the bending end of the bow rod front end piece is defined as the front upper end of the bow rod front end piece, a convex block is processed at the front upper end of the bow rod front end piece, and a blind hole is axially formed in the rear end face of the bow rod front end piece so as to be connected with the bow rod rear end piece; performing finish treatment on the surface of the front end piece of the bow rod to enable the finish to reach more than Ra0.05;
step three: forming and surface treating the rear end piece of the bow rod; firstly, prefabricating a metal hollow pipe with the length of 200 plus materials of 250mm, the diameter of an excircle of 5.5-7mm and the wall thickness of 2 mm; the front end of the metal hollow pipe is provided with a metal pin matched with the blind hole of the bow rod front end piece, the outer surface of the metal hollow pipe is wound with carbon fiber fabric prepreg, the fabric fiber tows of the carbon fiber fabric prepreg are more than 3K, adding high temperature resistant film bag, vacuumizing to 0.5-1.5MPa with a vacuum nozzle, compacting the carbon fiber fabric prepreg wound on the outer surface of the hollow metal tube, putting the hollow metal tube into a vacuum autoclave, heating to 90-180 ℃, pressurizing to 0.5-10MPa, curing and molding the wound carbon fiber fabric prepreg for 60-300min, taking out the end piece behind the bow rod after the temperature in the vacuum autoclave is reduced to 40-60 ℃, removing the high temperature resistant film bag molded piece, performing finish treatment on the surface of the bow rod rear end piece molding part to enable the finish degree to reach more than Ra0.05, and manufacturing a bow rod rear end piece;
step four: assembling the bow rod; tightly inserting the metal pin of the rear end piece of the bow rod into the blind hole of the front end piece of the bow rod to form the bow rod;
step five: forming and surface treating a front tail warehouse and a rear tail warehouse; the forming process of the front tail warehouse and the rear tail warehouse is as follows: respectively laying carbon fiber fabric prepreg on a front tail warehouse forming tool and a rear tail warehouse forming tool, wherein the laying thickness of each layer of carbon fiber fabric prepreg laid on the front tail warehouse forming tool is 0.1-0.2mm, 40-80 layers are always laid, the laying thickness of each layer of carbon fiber fabric prepreg laid on the rear tail warehouse forming tool is 0.1-0.2mm, 40-80 layers are always laid, respectively adding vacuum film bags on the front tail warehouse forming tool and the rear tail warehouse forming tool, respectively pumping negative pressure to 0.5-1.5MPa by using a vacuum nozzle, compacting the laid carbon fiber fabric prepreg, then putting the front tail warehouse forming tool and the rear tail warehouse forming tool into a vacuum hot-pressing tank, heating to 90-180 ℃, pressurizing to 0.5-10MPa, curing and forming the laid carbon fiber prepreg for 60-300min, taking out the front tail warehouse forming tool and the rear tail warehouse forming tool for forming after the temperature in the vacuum hot-pressing tank is reduced to 40-60 ℃, removing the high-temperature-resistant film bag, taking off the front tail warehouse forming piece and the rear tail warehouse forming piece, and respectively performing finish treatment on the surfaces of the front tail warehouse forming piece and the rear tail warehouse forming piece to enable the finish to reach more than Ra0.05;
step six: assembling the front tail warehouse and the rear tail warehouse with the bow rod; the back of the front tail warehouse is provided with a groove, one end of the bow hair is knotted and bound and then is fixedly placed in the front tail warehouse, the groove of the front tail warehouse is closely matched and fixed with a convex block of the bow rod front end piece, a rectangular hole is formed in the side wall of the bow rod rear end piece along the length direction, a nut and a movable bolt are both arranged in the inner cavity of the bow rod rear end piece and are in threaded connection, the end head of the movable bolt is abutted against the rear end face of the bow rod rear end piece, the nut is arranged in the rectangular hole and is fixedly connected with the lower end face of the rear tail warehouse, the movable bolt is rotated, and the nut reciprocates in the rectangular hole, so that the rear tail warehouse is driven to move forwards and backwards, and the purpose of adjusting the tightness of the bow hair on the bow rod is achieved;
step seven: assembling the fiddle bow; and moving the rear tail warehouse to the foremost end of the rectangular hole, tensioning the bow hairs to the position of the rear tail warehouse, tying and binding the bow hairs, then fixedly placing the bow hairs into the rear tail warehouse, finally rotating a movable bolt at the tail end of the bow rod to enable the rear tail warehouse to move to the rear end, and enabling the bow hairs to reach a specified tension value.
Compared with the prior art, the invention has the beneficial effects that: the fiddle bow is made of the carbon fiber material, and the carbon fiber material has the characteristics of high strength, high modulus, light weight, acid and alkali resistance, stable performance in a high-humidity high-temperature environment, convenience in shaping in a laying process and the like. After scientific and comprehensive mechanical stress analysis is conducted on the traditional wooden fiddle, excellent characteristics of the carbon fiber material in the field of mechanical stress are excavated, and on the premise that the traditional wooden fiddle has the advantages of resilience and the like, the performance of the fiddle is further improved by using the carbon fiber process, so that the fiddle exerts all ranges, and the use feeling of a user is improved. The advantages of the invention are embodied in the following aspects:
1. the bow rod made of carbon fiber can achieve permanent straight without side bending, the radian is fixed moderately, the gravity center point of the bow can be adjusted before leaving factory, and the bow rod has high hardness, strong toughness, sufficient elasticity and no softness (the traditional wooden bow is formed by hot-baking a whole stick with the length of about 70cm and the diameter of about 4-6mm, the plasticity of the material is poor, and the stability is low).
2. At the bow head department of carbon fiber bow pole, preceding tail storehouse and the preferred connected mode that adopts dovetail shape lug and dovetail to closely cooperate mutually of musical instrument pole top department for the structure is more fastened, adopts this kind of split type design convenience of customers to change or wash the bow hair (when wasing, with preceding, back tail storehouse and bow hair together soak in the washing liquid), improves the performance effect, prolongs the life of bow hair.
3. The radian and toughness of the traditional wood fiddle bow have no quantitative standard, and the radian of the fiddle bow determines the center of gravity, hardness, toughness and elasticity of the fiddle bow. When the high-strength music is pulled, in order to achieve the effect that the music can quickly burst to follow the rhythm, a player needs to have great strength in the bow carrying process, and the radian of the bow directly influences the continuity of playing actions and playing habits. The carbon fiber material can reach any radian required by design, and can be made into different diameters on a bow rod of a bow so as to realize perfect combination of toughness and hardness.
4. The carbon fiber bow stick for making the fiddle bow has stable performance, is easy to use for a long time and is convenient to store. The traditional wood fiddle bow has harsh requirements on storage environment, and the performance of the fiddle bow is greatly influenced by temperature, humidity, sunshine and the like. The carbon fiber material is used for removing the fiddle bows which are produced in a standardized, serialized and batched mode, and the long-term stability of the performance can be guaranteed. The user only needs to change the bow hair, so that the use cost of the user is saved.
5. The back tail storehouse also adopts carbon fiber material to make, reduces to adopt traditional mode preparation back tail storehouse to the consumption of valuable timber such as ebony, has the scale mark on the back tail storehouse frock, makes the beginner need not the relocation to the rate of tension of bow hair.
In conclusion, the fiddle bow manufactured by the method has light weight, flexible fiddle bow operation and full fiddle sound. When a player carries the bow, the finger can perfectly realize the light and heavy pressure of the bow hair and the performance transformation of the inner string and the outer string. On the premise of not increasing cost, the controllability, stability and flexibility of the bow and the bow hair are obviously improved, the playing stress of each part of the bow is balanced, and the operation is smoother and better. The invention can form a series of products of fiddle bow technical standard, and the unified industry standard is favorable for the high-quality large-scale mass production of fiddle bows.
Drawings
Fig. 1 is a schematic structural view of a bow rod tip;
FIG. 2 is a front view of the bow tip;
FIG. 3 is a schematic structural view of a fiddle bow made by the method of the present invention;
FIG. 4 is a front view of the front and tail libraries;
FIG. 5 is a left side view of FIG. 4;
FIG. 6 is a top view of FIG. 4;
FIG. 7 is a front view of the tailback library;
FIG. 8 is a left side view of the rear tail library;
FIG. 9 is a top view of the aft tail magazine;
FIG. 10 is a block diagram of the dovetail slot of the nose and tail magazine mating with the dovetail tab of the shank nose piece;
fig. 11 is a front view of the bow rod nose piece molding tool;
FIG. 12 is a right side view of FIG. 11;
fig. 13 is a top view of fig. 11.
The names and reference numbers of the components referred to in the above figures are as follows:
the bow rod front end part forming tool comprises a bow rod front end part 1, a dovetail-shaped convex block 11, a front tail library 2, a dovetail groove 21, a rear tail library 3, a bow rod rear end part 4 and a bow rod front end part forming tool 5.
Detailed Description
The first embodiment is as follows: as shown in fig. 1 to 13, the present embodiment discloses a method for manufacturing standardized mass-produced fiddle bows, the method comprising the steps of:
the method comprises the following steps: forming the bow rod nose piece 1; the external shape of the bow rod front end piece 1 is approximately a number '7', the front end of the bow rod front end piece 1 is bent and tilted, and the section of the rear end of the bow rod front end piece 1 is circular (the section of the uppermost end of the bent and tilted front end is rectangular); the bow rod nose piece 1 is formed by the following steps: lay on bow pole front end piece shaping frock 5: the carbon fiber prepreg is 88mm in width and 650mm in length, the spreading height of the carbon fiber prepreg is low in the front and high in the back, the change range of the height from front to back is 4-5.5mm, the laying thickness of each layer of carbon fiber prepreg is 0.1mm, and 40-55 layers are always laid; installing a high-temperature-resistant film bag on the bow rod front end piece forming tool 5, pumping negative pressure to 0.5-1.5MPa by using a vacuum nozzle, compacting the laid carbon fiber prepreg, putting the bow rod front end piece forming tool 5 into a vacuum autoclave, heating to 90-180 ℃, pressurizing to 0.5-10MPa, and curing and forming the laid carbon fiber prepreg for 60-300 min; taking out the bow rod front part forming tool 5 after the temperature in the vacuum hot pressing tank is reduced to 40-60 ℃, removing a high-temperature resistant film bag on the bow rod front part forming tool 5, taking down a cured and formed carbon fiber prepreg plate, cutting the carbon fiber prepreg plate into carbon fiber strips with the width of 6.5mm, the length of 580mm and the height being the same as the change range of the layer height of the carbon fiber prepreg, and finally trimming the carbon fiber strips into carbon fiber cylinders with the length of 570mm and the diameter of 3.5-5.0mm along the plane direction of the carbon fiber strips (the circular section gradually changes into a rectangular section along with the bending and tilting part of the front end, and the size is 35mm and 20 mm);
step two: processing a convex block and a blind hole and performing surface treatment on the bow rod nose piece 1; defining the bent end of the bow rod front end piece 1 as the front upper end of the bow rod front end piece 1, processing a convex block at the front upper end of the bow rod front end piece 1, and axially forming a blind hole (the shape of the formed blind hole is preferably a round hole, the diameter of the round hole is 3mm, and the depth of the round hole is 5-8mm) on the rear end surface of the bow rod front end piece 1 so as to be connected with the bow rod rear end piece 4; performing finish treatment on the surface of the bow rod nose piece 1 to enable the finish to reach more than Ra0.05;
step three: forming and surface treating the rear end piece 4 of the bow rod; firstly, prefabricating a metal hollow pipe with the length of 200 plus materials of 250mm, the diameter of an excircle of 5.5-7mm and the wall thickness of 2 mm; the front end of the metal hollow pipe is provided with a metal pin (the metal pin is preferably a metal cylindrical pin with the diameter of 3mm and the length of 5-8mm and is matched with a round hole, before delivery, the length of the metal cylindrical pin can adjust the gravity center position of a bow), the outer surface of the metal hollow pipe is wound with a carbon fiber fabric prepreg, the fabric fiber bundle of the carbon fiber fabric prepreg is above 3K, a high-temperature resistant film bag is additionally arranged, the vacuum nozzle is used for pumping negative pressure to 0.5-1.5MPa, the carbon fiber fabric prepreg wound on the outer surface of the metal hollow pipe is compacted, the metal hollow pipe is placed into a vacuum hot-pressing tank to be heated to 90-180 ℃, the pressure is increased to 0.5-10MPa, and the wound carbon fiber fabric prepreg is cured and molded after 60-300min, taking out the bow rod rear end piece formed part after the temperature in the vacuum hot pressing tank is reduced to 40-60 ℃, removing the high-temperature resistant film bag, and performing finish treatment on the surface of the bow rod rear end piece formed part to enable the finish to reach more than Ra0.05 to prepare a bow rod rear end piece 4;
step four: assembling the bow rod; tightly inserting a metal pin of the bow rod rear end piece 4 into a blind hole of the bow rod front end piece 1 to form a bow rod;
step five: forming and surface treating the front tail warehouse 2 and the rear tail warehouse 3; (the external shape of the front tail warehouse 2 is similar to a triangular cube, and the external shape of the rear tail warehouse 3 is similar to a cuboid). the forming process of the front tail warehouse 2 and the rear tail warehouse 3 is as follows: respectively laying carbon fiber fabric prepreg on a front tail warehouse forming tool and a rear tail warehouse forming tool, wherein the laying thickness of each layer of carbon fiber fabric prepreg laid on the front tail warehouse forming tool is 0.1-0.2mm, 40-80 layers are always laid, the laying thickness of each layer of carbon fiber fabric prepreg laid on the rear tail warehouse forming tool is 0.1-0.2mm, 40-80 layers are always laid, respectively adding a vacuum film bag on the front tail warehouse forming tool and the rear tail warehouse forming tool, respectively pumping negative pressure to 0.5-1.5MPa by using a vacuum nozzle, compacting the laid carbon fiber fabric prepreg, then putting the front tail warehouse forming tool and the rear tail warehouse forming tool into a vacuum hot-pressing tank, heating to 90-180 ℃, pressurizing to 0.5-10MPa, curing and forming the laid carbon fiber prepreg for 60-300min, taking out the front tail warehouse forming tool and the rear tail warehouse forming tool to form after the vacuum hot-pressing temperature is reduced to 40-60 ℃, removing the high-temperature-resistant film bag, taking off the front tail warehouse forming piece and the rear tail warehouse forming piece, and respectively performing finish treatment on the surfaces of the front tail warehouse forming piece and the rear tail warehouse forming piece to enable the finish to reach more than Ra0.05;
step six: assembling the front tail warehouse 2 and the rear tail warehouse 3 with the bow rod; processing a groove on the back surface of the front tail warehouse 2, tying and binding one end of the bow hair, then fixedly placing the bow hair into the front tail warehouse 2, tightly matching and fixing the groove of the front tail warehouse 2 and a convex block of the bow rod front end piece 1, forming a rectangular hole on the side wall of the bow rod rear end piece 4 along the length direction, arranging a nut and a movable bolt in an inner cavity of the bow rod rear end piece 4, connecting the nut and the movable bolt in a threaded manner, abutting the end head of the movable bolt against the rear end surface of the bow rod rear end piece 4, arranging the nut at the rectangular hole and fixedly connecting the nut with the lower end surface of the rear tail warehouse 3, rotating the movable bolt, and enabling the nut to move in the rectangular hole in a reciprocating manner, so that the rear tail warehouse 3 is driven to move back and forth, and the purpose of adjusting the tightness of the bow hair on the bow rod is achieved;
step seven: assembling the fiddle bow; and moving the rear tail warehouse 3 to the foremost end (the most loose end) of the rectangular hole, tensioning the bow hair to the position of the rear tail warehouse 3, tying the bow hair, fixing the bow hair in the rear tail warehouse 3, and finally rotating a movable bolt at the tail end of the bow rod to move the rear tail warehouse 3 to the rear end so as to enable the bow hair to reach a specified tension value.
The second embodiment is as follows: as shown in fig. 1 and 2, the present embodiment is further described with respect to the first embodiment, and in the second step, the surface of the bow tip 1 is subjected to a finish treatment, specifically: spraying a layer of primer on the outer surface of the bow rod nose piece 1, drying for 2-4 hours and then polishing once until the finish degree reaches more than Ra0.1, spraying a layer of matte finish paint, drying for 2-4 hours and then polishing once until the finish degree reaches more than Ra0.05.
The third concrete implementation mode: as shown in fig. 1, 4 and 6, the first embodiment is further described, in the second step, the protruding block processed at the front upper end of the bow rod front end piece 1 is a dovetail protruding block 11; in the sixth step, the groove processed on the back of the front and rear magazines 2 is a dovetail groove 21, and the dovetail-shaped projection 21 is tightly matched with the dovetail groove 21.
The fourth concrete implementation mode: in the fifth step, the surface of the front and rear tail stock molded pieces is subjected to finish treatment, specifically: respectively spraying a layer of primer on the surfaces of the front and rear tail warehouse forming pieces, respectively, polishing once after drying for 2-4h to enable the finish degree to respectively reach more than Ra0.1, then respectively spraying a layer of matte finish, and polishing once after drying for 2-4h to enable the finish degree to respectively reach more than Ra0.05.
The fifth concrete implementation mode: in the fifth step, scale marks are arranged on two opposite side walls of the rear tail bin forming tool.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the present invention is not limited thereto, and any person skilled in the art can make equivalents or changes within the technical scope of the present invention, which is disclosed by the present invention, and the technical solutions and inventions of the present invention are also covered by the protection scope of the present invention.
Claims (5)
1. A standardized and mass production manufacturing method of fiddle bows is characterized in that: the method comprises the following steps:
the method comprises the following steps: the bow rod nose piece (1) is molded; the external shape of the bow rod front end piece (1) is similar to a numeral '7', the front end of the bow rod front end piece (1) is bent and tilted, and the section of the rear end of the bow rod front end piece (1) is circular; the bow rod nose piece (1) is formed by the following steps: lay on bow pole front end piece shaping frock (5): the carbon fiber prepreg is 88mm in width and 650mm in length, the spreading height of the carbon fiber prepreg is low in the front and high in the back, the change range of the height from front to back is 4-5.5mm, the spreading thickness of each layer of carbon fiber prepreg is 0.1mm, and 40-55 layers are always spread; adding a high-temperature-resistant film bag on the bow rod front end piece forming tool (5), pumping negative pressure to 0.5-1.5MPa by using a vacuum nozzle, compacting the laid carbon fiber prepreg, putting the bow rod front end piece forming tool (5) into a vacuum autoclave, heating to 90-180 ℃, pressurizing to 0.5-10MPa, and curing and forming the laid carbon fiber prepreg for 60-300 min; taking out the bow rod front part forming tool (5) after the temperature in the vacuum hot pressing tank is reduced to 40-60 ℃, removing a high-temperature resistant film bag on the bow rod front part forming tool (5), taking down a cured and formed carbon fiber prepreg plate, cutting the carbon fiber prepreg plate into carbon fiber strips with the width of 6.5mm, the length of 580mm and the height in the same range as the change range of the layering height of the carbon fiber prepreg, and finally trimming the carbon fiber strips into carbon fiber cylinders with the length of 570mm and the diameter of 3.5-5.0mm along the plane direction of the carbon fiber strips;
step two: processing a convex block and a blind hole and performing surface treatment on the bow rod nose piece (1); the bending end of the bow rod front end piece (1) is defined as the front upper end of the bow rod front end piece (1), a convex block is processed at the front upper end of the bow rod front end piece (1), and a blind hole is axially formed in the rear end surface of the bow rod front end piece (1) for connecting with the bow rod rear end piece (4); performing finish treatment on the surface of the bow rod nose piece (1) to enable the finish to reach more than Ra0.05;
step three: forming and surface treating a rear end piece (4) of the bow rod; firstly, prefabricating a metal hollow pipe with the length of 200 plus materials of 250mm, the diameter of an excircle of 5.5-7mm and the wall thickness of 2 mm; the front end of the metal hollow pipe is provided with a metal pin matched with the blind hole of the bow rod front end piece (1), winding carbon fiber fabric prepreg on the outer surface of the metal hollow pipe, wherein the fabric fiber tows of the carbon fiber fabric prepreg are more than 3K, adding high temperature resistant film bag, vacuumizing to 0.5-1.5MPa with a vacuum nozzle, compacting the carbon fiber fabric prepreg wound on the outer surface of the hollow metal tube, putting the hollow metal tube into a vacuum hot-pressing tank, heating to 90-180 deg.C, pressurizing to 0.5-10MPa, curing and molding the wound carbon fiber fabric prepreg for 60-300min, taking out the end piece of the bow rod after the temperature in the vacuum hot-pressing tank is reduced to 40-60 deg.C, removing the high temperature resistant film bag, performing finish treatment on the surface of the bow rod rear end piece molding part to enable the finish degree to reach more than Ra0.05 to prepare a bow rod rear end piece (4);
step four: assembling the bow rod; tightly inserting a metal pin of the bow rod rear end piece (4) into a blind hole of the bow rod front end piece (1) to form a bow rod;
step five: forming and surface treating the front tail warehouse (2) and the rear tail warehouse (3); the forming process of the front tail warehouse (2) and the rear tail warehouse (3) is as follows: respectively laying carbon fiber fabric prepreg on a front tail warehouse forming tool and a rear tail warehouse forming tool, wherein the laying thickness of each layer of carbon fiber fabric prepreg laid on the front tail warehouse forming tool is 0.1-0.2mm, 40-80 layers are always laid, the laying thickness of each layer of carbon fiber fabric prepreg laid on the rear tail warehouse forming tool is 0.1-0.2mm, 40-80 layers are always laid, respectively adding a vacuum film bag on the front tail warehouse forming tool and the rear tail warehouse forming tool, respectively pumping negative pressure to 0.5-1.5MPa by using a vacuum nozzle, compacting the laid carbon fiber fabrics, then putting the front tail warehouse forming tool and the rear tail warehouse forming tool into a vacuum hot-pressing tank, heating to 90-180 ℃, pressurizing to 0.5-10MPa, curing and forming the laid carbon fiber prepreg in 60-300min, taking out the front tail warehouse forming tool and the rear tail warehouse forming tool after the temperature in the vacuum hot-pressing tank is reduced to 40-60 ℃, removing the high-temperature resistant film bag, taking off the front tail warehouse forming piece and the rear tail warehouse forming piece, and respectively performing finish treatment on the surfaces of the front tail warehouse forming piece and the rear tail warehouse forming piece to enable the finish to reach more than Ra0.05;
step six: assembling the front tail warehouse (2) and the rear tail warehouse (3) with the bow rod; processing a groove on the back surface of the front tail warehouse (2), tying and binding one end of the bow hair, then fixedly placing the bow hair into the front tail warehouse (2), tightly matching and fixing the groove of the front tail warehouse (2) and a lug of the bow rod front end piece (1), forming a rectangular hole on the side wall of the bow rod rear end piece (4) along the length direction, arranging a nut and a movable bolt in an inner cavity of the bow rod rear end piece (4), connecting the nut and the movable bolt in a threaded manner, enabling the end head of the movable bolt to abut against the rear end surface of the bow rod rear end piece (4), arranging the nut at the rectangular hole and fixedly connecting the nut with the lower end surface of the rear tail warehouse (3), rotating the movable bolt, and enabling the nut to reciprocate in the rectangular hole, thereby driving the rear tail warehouse (3) to move back and forth, and achieving the purpose of adjusting the tightness of the bow hair on the bow rod;
step seven: assembling the fiddle bow; the rear tail warehouse (3) is moved to the foremost end of the rectangular hole, the bow hair is tensioned to the position of the rear tail warehouse (3), the bow hair is tied and bound and then fixedly placed in the rear tail warehouse (3), finally, a movable bolt at the tail end of the bow rod is rotated, the rear tail warehouse (3) is moved to the rear end, and the bow hair reaches a specified tension value.
2. The method of manufacturing standardized mass-produced fiddle bows according to claim 1, wherein: in the second step, the surface of the bow rod nose piece (1) is subjected to finish treatment, and the finish treatment specifically comprises the following steps: the outer surface of the bow rod nose piece (1) is firstly sprayed with a layer of primer, the surface is polished after being dried for 2-4 hours until the smoothness reaches more than Ra0.1, then a layer of matte finish is sprayed, the surface is polished after being dried for 2-4 hours until the smoothness reaches more than Ra0.05.
3. The method of manufacturing standardized mass-produced fiddle bows according to claim 1, wherein: in the second step, the lug processed at the front upper end of the bow rod front end piece (1) is a dovetail lug (11); in the sixth step, the groove processed on the back of the front tail warehouse (2) is a dovetail groove (21), and the dovetail-shaped bump (21) is tightly matched with the dovetail groove (21).
4. The method of manufacturing standardized mass-produced fiddle bows according to claim 1, wherein: in the fifth step, the surface of the front and rear tail stock molded parts is subjected to finish treatment, specifically: respectively spraying a layer of primer on the surfaces of the front and rear tail warehouse forming pieces, respectively, polishing once after drying for 2-4h to enable the finish degree to respectively reach more than Ra0.1, then respectively spraying a layer of matte finish, and polishing once after drying for 2-4h to enable the finish degree to respectively reach more than Ra0.05.
5. The method of manufacturing standardized mass-produced fiddle bows according to claim 1, wherein: in the fifth step, scale marks are arranged on two opposite side walls of the rear tail warehouse forming tool.
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| TWI421855B (en) * | 2010-04-07 | 2014-01-01 | Yamaha Corp | Stick of string instrument bow, string instrument bow and methods of manufacturing stick of string instrument bow |
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| CN112750413A (en) | 2021-05-04 |
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