CN100402250C - High frequency binding profiling technology of piano tuning plate rib wood and its special device - Google Patents
High frequency binding profiling technology of piano tuning plate rib wood and its special device Download PDFInfo
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- CN100402250C CN100402250C CNB2005100126477A CN200510012647A CN100402250C CN 100402250 C CN100402250 C CN 100402250C CN B2005100126477 A CNB2005100126477 A CN B2005100126477A CN 200510012647 A CN200510012647 A CN 200510012647A CN 100402250 C CN100402250 C CN 100402250C
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Abstract
The present invention relates to improvement for the existing piano sound board rib wood gluing formation technology and a special processing device thereof. The improved technology has the key point that a high frequency press is adopted to form the following technology characteristics: (1) independent hydraulic rams (5) evenly distributed are used for pressurizing above a lower explorator; (2) a high frequency electric field induction heating mode is used for heating and solidifying the medium of a glue surface. A traditional high frequency press is improved by the technology. The quantity and the geometric size of an adoptive independent hydraulic ram, a positive electrode and a negative electrode are matched with those of rib wood bars required by a sound board.
Description
Technical field
The present invention is the improvement to the critical component soundboard stall bars gummed setting process and the processing isolated plant thereof of existing piano product.
Background technology
The typing of piano soundboard stall bars gummed is one critical process that is related to the piano quality.This procedure is the Loudspeaker panel with piano, is called for short soundboard, and splicing is processed as after certain plane geometric shape, with pre-processed pressurization of stall bars bar and the bonding curved surface shape that designs that is fixed to.Preset flat nail on the soundboard before the pressurized adhesion, flat nail is on the concave surface of soundboard after the pressurized adhesion, plays the key effect of transmitting the string sound wave.Be in the existing processing technology after the assembly unit moulding of plane soundboard and the pattern that presets processing typing, the curved face type soundboard of flat nail, stall bars bar are ready to complete, behind gluing between stall bars bar and the plane soundboard, insert down pattern, then to patrix pressurization, attached mould, adopt Steam Heating in the time of pressurization or take the typing of nature cooling curing.Because the complexity of soundboard moulding rear curved surface, only the typing cemented surface of exerting pressure with the stall bars bar by patrix is difficult to accomplish that whole attached realities are even, so the process of high-quality product is very long and difficult, operational process of craft is complicated and lack standard, and the dimension one that " experience " becomes product quality guarantees it is the management philosophy that does not meet modern enterprise.It is cool in the uneven outer heat that Steam Heating is heated the glue face, spontaneous curing not only the time oversize, and can form the quality that soft core directly influences soundboard.
Summary of the invention
The objective of the invention is conventional machining process and pressurization, heating special tooling are improved the electromagnetic field of high frequency heating and the high-quality bonding and curing operation of fluid head drive pressurization means realization that adopt the high frequency press to provide.
Key of the present invention is to have adopted the high frequency press in piano soundboard stall bars gummed setting process, thereby has realized that the bull hydraulic cylinder evenly pressurizes, high-frequency dielectric from inside to outside heats and curing fast.Become following characteristics in property on the processing technology: 1. above following pattern by the equally distributed independent hydraulically controlled cylinder attached mould that pressurizes, 2. adopt the high-frequency electric field induction heating mode to realize and solidify the medium heating of glue face.
The good effect of above process characteristic is: can effectively guarantee attached real, the pressurization of each root batten and combining of soundboard evenly, form technical specification easily and guarantee the product quality produced in batches.Be heated evenly inside and outside the glue face, curing rate improves hundred times, and thorough, firm quality is significantly improved than traditional handicraft.
In order to realize that above technology is improved to general high frequency press piano soundboard stall bars radio frequency gluing typing isolated plant especially.This device is made up of platen formula press and high frequency electric source two parts.Pressing mechanism in the platen formula press is made up of for the fluid head that independent hydraulically controlled cylinder uniform on methods, rack on the workbench drives single or unidirectional fluid head design improvement, loading positive and negative electrode in the high frequency electric source in the export structure is the strip shaped electric poles that multi-channel parallel is provided with, positive and negative electrode is disposed on stall bars bar both sides, and the quantity of independent hydraulically controlled head and positive and negative electrode and physical dimension all are complementary with the required stall bars bar of soundboard.
Above technology can make each root batten and soundboard uniform-compression, inside and outside thermally equivalent under the support of above isolated plant, realize that high-quality gummed finalizes the design.
Further specify below in conjunction with accompanying drawing and the objective of the invention is how to realize.
Description of drawings
Fig. 1 is the structure and the processing technology schematic diagram of soundboard and the typing of stall bars bar gummed.
Fig. 2 is the structured flowchart of the higher-order of oscillation negative pressure lockout circuit of piano soundboard stall bars radio frequency gluing typing isolated plant medium-high frequency power supply.
Fig. 3 is the electrical schematic diagram of negative pressure lockout circuit.
Wherein 1 is soundboard, and 2 is the stall bars bar, and 3 is flat nail, 4 attenuators, and 5 independent hydraulically controlled cylinders of representative and the fluid head that is driven, A represents controlled negative high voltage generation circuit, B representative sampling circuits for triggering, CW represents a reverse-blocking tetrode thyristor circuit.R1-R6 is a resistive element, and C is an electric capacity, and M is a variable resistor, and T is that triode SW is a bilateral diode, and D1-D4 is a rectifying tube, and frame of broken lines is represented press body or circuit case.
The specific embodiment
Improved key to traditional handicraft is to have introduced through the designed high frequency press of special improvement, to adapt to new processing technology.The pattern that comprises the assembly unit moulding of plane soundboard in the technology after the improvement and preset processing typing, the curved face type soundboard of flat nail, floor bar is prepared, gluing is gone into mould, the attached mould of pressurization and heated gluing and solidifying each operation of finalizing the design simultaneously between floor bar and the plane soundboard, and crucial improvement is to have adopted in this technology to have formed following technology characteristics behind the high frequency press:
1. above following pattern by the attached mould of equally distributed independent hydraulically controlled oil cylinder 5 pressurizations,
2. adopt the high-frequency electric field induction heating mode to realize the medium of glue is heated and solidifies.
Evenly stressed in order to guarantee that each root batten 2 and soundboard 1 pressurize, independent hydraulically controlled oil cylinder 5 is pressed the corresponding evenly distribution of quantity and position of stall bars bar 2, and carries out independent adjustment by theoretical designing requirement, makes pressurization reach perfect condition.
Need output with high-frequency electric field to be carried on the glue face between soundboard 1 and the stall bars bar 2 at the same time. the method for loading promptly is heating electrode (P, N) the positive and negative alternate both sides that are located at stall bars bar 2 respectively of drawing from the high frequency electric source output.The electric field of high frequency conversion make xanthan molecule polarization and at a high speed upset evenly heat up rapidly, finish curing in the short time. (P, quantity N) and physical dimension and stall bars bar 2 are complementary for the quality heating electrode that guarantees to solidify.
When carrying out high-frequency heating because high-frequency induction flat nail 3 can damage soundboards by Yin Gaowen. be provided with high-frequency electric field attenuator 4 for preventing that flat nail 3 inductions from heating up in the both sides of flat nail 3, concrete attenuator 4 be an angle bar shape ferromagnetic material formation.The electromagnetic property of attenuator 4 is easy to absorbing high-frequency electric energy protection flat nail 3. in high-frequency induction heating
Used piano soundboard stall bars radio frequency gluing typing isolated plant in the above technology, be that general high frequency press local improvement is formed, it is made up of platen formula press and high frequency electric source two parts, pressing mechanism in the platen formula press is formed by being set in the fluid head that uniform independent hydraulically controlled cylinder 5 drives on the methods, rack on the workbench, positive and negative electrode (the P that output is drawn in the high frequency electric source output circuit, N) strip shaped electric poles that is provided with for multi-channel parallel, positive and negative electrode (P, N) be disposed on the both sides of stall bars bar 2, (P, quantity N) and physical dimension all are complementary with the required stall bars bar 2 of soundboard 1 for independent hydraulically controlled 5 and positive and negative electrode.
Because the existence of flat nail high-frequency induction heating the time, and numerous factors such as induction effect of high frequency, high-voltage alternating electric field can cause disruptive discharge, and the existence of disruptive spark will influence the operate as normal of isolated plant.For this reason, the present invention has set up a negative pressure lockout circuit especially in the high-frequency oscillating circuits of high frequency electric source, this circuit is made up of controlled negative high voltage generation circuit A and disruptive spark circuits for triggering B two parts, the triggering signal that the signal that disruptive spark is detected converts to causes the trigger end of controlled negative high voltage generation circuit A from disruptive spark circuits for triggering B, the output of controlled negative high voltage generation circuit A is connected on the grid of high-frequency oscillating circuits medium-high frequency oscillating tube.Be equivalent to add on the grid of the higher-order of oscillation pipe vibration lockout circuit.During operate as normal, be connected to autobias on the grid of higher-order of oscillation pipe.When puncturing sparking, the breakdown spark circuits for triggering of the pulse signal B that sparking forms detects, and start-up circuit sends triggering signal, the controlled negative high voltage generation of this signal triggering reverse-blocking tetrode thyristor circuit turn-on circuit A, negative 1500 volts voltage is added on the grid of higher-order of oscillation pipe, this pipe is quit work, thereby reach spark-extinguishing purpose.
What Fig. 3 was given is the electrical schematic diagram of negative pressure lockout circuit.Therefrom controlled as can be seen negative high voltage generation circuit A is made up of bridge rectifier filter circuit and reverse-blocking tetrode thyristor circuit CW that first to fourth rectifying tube D1-D4, first resistance R 1, first capacitor C 1, variable resistor M overlap joint form, the output negative pole of bridge rectifier filter circuit is connected to the grid of high-frequency oscillating circuits medium-high frequency oscillating tube, anodal by the reverse-blocking tetrode thyristor circuit ground, the trigger end of reverse-blocking tetrode thyristor circuit CW is returned and is worn the output of spark circuits for triggering B.Disruptive spark circuits for triggering B is one and is made up of triode T, second to the 6th resistance R 2-R6, bilateral diode SW, one of bilateral diode SW sampling disruptive spark terminates on body or the shell, and triggering signal leads to the trigger end of reverse-blocking tetrode thyristor circuit CW from the 5th resistance R 5 one ends.The bias voltage that sparking causes is carried on the triode T, make triode T conducting on the 5th resistance 5, form triggering signal, the trigger end that this signal causes reverse-blocking tetrode thyristor circuit CW makes the negative pressure of bridge rectifier filter circuit export the grid of higher-order of oscillation pipe to, reaches spark-extinguishing purpose.
Claims (6)
1. high frequency binding profiling technology of piano tuning plate rib wood, the pattern that this technology comprises the assembly unit moulding of plane soundboard and presets the processing typing of flat nail, stall bars bar (2), curved face type soundboard is prepared, gluing is gone into mould, the attached mould of pressurization and added hot gluing and each procedure of solidifying and setting simultaneously between stall bars bar (2) and the plane soundboard, it is characterized in that having adopted in this technology the high frequency press and has formed following technology characteristics:
1. above following pattern by equally distributed independent hydraulically controlled oil cylinder (5) the attached mould that pressurizes, independent hydraulically controlled oil cylinder (5) press the corresponding evenly distribution of quantity and position of stall bars bar (2),
2. adopt the high-frequency electric field induction heating mode to realize the medium of glue face is heated and solidifies,
The heating electrode that high frequency electric source output in the above-mentioned high frequency press is drawn (P, N) positive and negative alternate branch is located at the both sides of stall bars bar (2), and (P, quantity N) and physical dimension and stall bars bar (2) are complementary heating electrode.
2. high frequency binding profiling technology of piano tuning plate rib wood according to claim 1 is characterized in that in the described high-frequency electric field induction heating mode being provided with in the both sides of flat nail (3) the high-frequency electric field attenuator (4) that angle bar shape ferromagnetic material constitutes.
3. piano soundboard stall bars radio frequency gluing typing isolated plant, form by platen formula press and high frequency electric source two parts, it is characterized in that the pressing mechanism in the platen formula press forms by being set on the workbench fluid head that independent hydraulically controlled cylinder (5) uniform on the methods, rack drives, positive and negative electrode (the P that output is drawn in the high frequency electric source output circuit, N) strip shaped electric poles that is provided with for multi-channel parallel, positive and negative electrode (P, N) be disposed on the both sides of stall bars bar (2), (P, quantity N) and physical dimension all are complementary with the required stall bars bar (2) of soundboard (1) for independent hydraulically controlled head (5) and positive and negative electrode.
4. piano soundboard stall bars radio frequency gluing typing isolated plant according to claim 3, it is characterized in that having set up a negative pressure lockout circuit in the high-frequency oscillating circuits of high frequency electric source, this circuit is made up of controlled negative high voltage generation circuit (A) and disruptive spark circuits for triggering (B) two parts, the triggering signal that the spark detecting signal converts to causes the trigger end of controlled negative high voltage generation circuit (A) from disruptive spark circuits for triggering (B), the output of controlled negative high voltage generation circuit (A) is connected on the grid of high-frequency oscillating circuits medium-high frequency oscillating tube (G).
5. piano soundboard stall bars radio frequency gluing typing isolated plant according to claim 4, the controlled negative high voltage generation circuit (A) that it is characterized in that the negative pressure lockout circuit of being set up in the high-frequency oscillating circuits of high frequency electric source is by first to fourth rectifying tube (D1-D4), first resistance (R1), first electric capacity (C1), a bridge rectifier filter circuit and a reverse-blocking tetrode thyristor circuit (CW) that variable resistor (M) overlap joint forms are formed, the output negative pole of bridge rectifier filter circuit is connected to the grid of high-frequency oscillating circuits medium-high frequency oscillating tube (G), anodal by reverse-blocking tetrode thyristor circuit (CW) ground connection, the trigger end of reverse-blocking tetrode thyristor circuit (CW) is returned and is worn the output of spark circuits for triggering (B).
6. piano soundboard stall bars radio frequency gluing typing isolated plant according to claim 5, the disruptive spark circuits for triggering (B) that it is characterized in that the negative pressure lockout circuit of being set up in the high-frequency oscillating circuits of high frequency electric source are made up of triode (T), second to the 6th resistance (R2-R6), bilateral diode (SW), one of bilateral diode (SW) sampling disruptive spark terminates on body or the shell, and triggering signal leads to the trigger end of reverse-blocking tetrode thyristor circuit (CW) from the 5th resistance (R5) end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100126477A CN100402250C (en) | 2005-07-06 | 2005-07-06 | High frequency binding profiling technology of piano tuning plate rib wood and its special device |
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| CNB2005100126477A CN100402250C (en) | 2005-07-06 | 2005-07-06 | High frequency binding profiling technology of piano tuning plate rib wood and its special device |
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| CN1718388A CN1718388A (en) | 2006-01-11 |
| CN100402250C true CN100402250C (en) | 2008-07-16 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101623884B (en) * | 2009-08-03 | 2012-07-25 | 湖北华都钢琴制造有限公司 | Shell hot-pressing forming machine of grand piano |
| CN102320068B (en) * | 2011-09-21 | 2013-07-10 | 南京林业大学 | Improved method for manufacturing high-frequency heated bamboo/wood recombined material |
| CN104240681B (en) * | 2014-08-29 | 2019-03-22 | 浙江品创知识产权服务有限公司 | A kind of piano soundboard stall bars gluing shaping equipment |
| CN105328756B (en) * | 2015-10-08 | 2017-11-21 | 重庆谭木匠工艺品有限公司 | The quick combination method of wooden comb |
| CN109015954B (en) * | 2018-07-25 | 2020-12-15 | 南京林业大学 | Method for improving weather resistance and mechanical property of bamboo plywood |
| CN111452180A (en) * | 2020-05-20 | 2020-07-28 | 江苏无锡欧派集成家居有限公司 | Furniture board oscillation laser beam gluing process |
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|---|---|---|---|---|
| CN2040846U (en) * | 1988-12-06 | 1989-07-12 | 周祖贵 | New-type bamboo splice plate machine |
| DD288259A5 (en) * | 1989-09-29 | 1991-03-21 | Veb Deutsche Piano-Union Leipzig,De | PRE-RIBBED RIBBONS FOR RESONANCE BOOKS OF MUSICAL INSTRUMENTS |
| CN2239580Y (en) * | 1996-01-17 | 1996-11-06 | 阎慧旗 | Hi-frequency electromagnetic heater |
| JPH08320684A (en) * | 1995-05-26 | 1996-12-03 | Kawai Musical Instr Mfg Co Ltd | Soundboard for piano, its production and piano |
| CN2273643Y (en) * | 1995-06-12 | 1998-02-04 | 石家庄开发区新谋新科技开发公司 | High-frequency forming machine for curved wood |
| CN2378800Y (en) * | 1999-05-13 | 2000-05-17 | 烟台龙凤钢琴有限公司 | Piano sound boards |
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2005
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Patent Citations (6)
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|---|---|---|---|---|
| CN2040846U (en) * | 1988-12-06 | 1989-07-12 | 周祖贵 | New-type bamboo splice plate machine |
| DD288259A5 (en) * | 1989-09-29 | 1991-03-21 | Veb Deutsche Piano-Union Leipzig,De | PRE-RIBBED RIBBONS FOR RESONANCE BOOKS OF MUSICAL INSTRUMENTS |
| JPH08320684A (en) * | 1995-05-26 | 1996-12-03 | Kawai Musical Instr Mfg Co Ltd | Soundboard for piano, its production and piano |
| CN2273643Y (en) * | 1995-06-12 | 1998-02-04 | 石家庄开发区新谋新科技开发公司 | High-frequency forming machine for curved wood |
| CN2239580Y (en) * | 1996-01-17 | 1996-11-06 | 阎慧旗 | Hi-frequency electromagnetic heater |
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Non-Patent Citations (3)
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| CN1718388A (en) | 2006-01-11 |
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