CN203471520U - Equipment for processing medium-radius arc surface on piano rib - Google Patents

Abstract

The utility model discloses equipment for processing a medium-radius arc surface on a piano rib. The equipment comprises racks, work benches, power wheels, tensioning wheels, rotational contour wheels, abrasive belts and power devices, wherein the power devices are connected with the power wheels, and the contour wheels are arranged on the racks; the abrasive belts surround the power wheels, the tension wheels and the contour wheels to form closed triangles; processing space allowing the end of the rib to be pushed in is formed between the contour wheels and the work benches; and the outer diameters of the abrasive belts located on the contour wheels are equal to the radius of the medium-radius arc surface on the piano rib. The equipment for processing the medium-radius arc surface on the piano rib has the advantages of high work efficiency and accuracy and small labor intensity.

Description

The process equipment of the upper radius arc face of a kind of piano stall bars

Technical field

The utility model relates to the process equipment of piano parts, is specifically related to the process equipment of the upper radius arc face of a kind of piano stall bars.

Background technology

Referring to Fig. 1, stall bars 1 are important parts in piano, and it is bonded on piano soundboard 2, and for improving elasticity and the hardness of soundboard 2, it can pass to sound wave rapidly monoblock soundboard 2 simultaneously.Piano soundboard 2 is to be arranged by low, middle pitch to the paired linea angulata of high pitch with the grain of wood of string code, the texture trend of stall bars 1 is arranged vertically with soundboard 2, string code, make the texture of timber form anyhow intersect netted, sound is excited in any point of string code, all can spread all over rapidly monoblock soundboard 2.

So because stall bars 1 two ends place stress decrease is whittled into arc surface 1-1, thereby can avoid like this stall bars 1 two ends perk to reduce soundboard 2 elasticity.And the stall bars 1 that are in soundboard 2 diverse locations are also different on the flexible impact of soundboard 2, therefore the radius size of the arc surface 1-1 of stall bars 1 need to be according to the vibration regularity of soundboard 13 and stall bars 1 Position Design, in general, be divided into three kinds of minor radius, middle radius and large radiuses, for example, in the piano of certain model, the radius of small-radius arc face 1-1 is R40mm, the radius of middle radius arc face 1-1 is R175mm, and the radius of large radius arc face 1-1 is divided into tetra-kinds of R300mm, R450mm, R600mm and R800mm.

On existing stall bars 1, the processing method of arc surface 1-1 is first to use carpenter's flat chisel according to mould appearance by the profile roughing of arc surface 1-1 out, leaves certain allowance; Then with bending of the hand plane, manually by curved profile, dig, then with check mould shape, check whether reach requirement.Existing this processing method exists that efficiency is low, low precision and the large shortcoming of labour intensity, and while carrying out roughing with carpenter's flat chisel, cutter likely extends along wood grain, when wood grain is downwards when (or being named against the grain), if the depth of cut is large, can there is tearing phenomenon along grain direction.While even surpassing machining profile surface, there is item for disposal, even waste product in tear face.

Utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, and the process equipment of the upper radius arc face of a kind of piano stall bars is provided, and this process equipment has advantages of that operating efficiency is high, precision is high and labour intensity is little.

The technical scheme that the utility model is realized above-mentioned purpose is:

The process equipment of the upper radius arc face of a kind of piano stall bars, it is characterized in that, comprise frame, workbench, power wheel, regulating wheel, rotating contour wheel, abrasive band and power set, wherein, described power set are connected with power wheel, and described contour wheel is arranged in frame; Described sand belt encircling forms the triangle of sealing on power wheel, regulating wheel and contour wheel; Between described contour wheel and workbench, be formed with and add the processing space of man-hour for allowing stall bars end push; The external diameter that is positioned at the abrasive band on contour wheel equates with the radius of the upper radius arc face of stall bars.

A preferred version of the present utility model, wherein, this process equipment comprises two cover processing assemblies, every suit processing assembly comprises described workbench, power wheel, regulating wheel, contour wheel, abrasive band and power set.Every suit processing assembly all can independently complete the processing of the upper radius arc face of stall bars, is conducive to like this raise the efficiency, save space.Particularly, two overlap processing assemblies front and back arranges, and two workbench in two cover processing assemblies are arranged on the left and right sides, two abrasive bands cross-shaped front and back setting in two cover processing assemblies.Like this, only need utilize the space of a set of processing assembly that two cover processing assemblies just can be set, utilize fully space; Workman operates in the left and right sides respectively, is independent of each other, and makes full use of space, has improved operating efficiency.

A preferred version of the present utility model, wherein, described workbench is connected with frame in the following manner: frame is provided with supporting base, the side of this supporting base is fixedly connected with frame, top is provided with adjustment backing plate, one end of described workbench is hinged on one end of this adjustment backing plate by jointed shaft, between the other end of the other end of workbench and adjustment backing plate, be provided with adjusting bolt, one end of this adjusting bolt is supported on to be adjusted on backing plate, the other end extend in the tune hole of workbench, this adjustment bolt is provided with nut, and this nut is pressed on the bottom surface of workbench.Like this, the one end that is equivalent to workbench is bearing on described nut, by rotating this nut, can make workbench rotate around jointed shaft, thereby the working space between contour wheel and workbench is finely tuned, to adapt to the processing of the stall bars of different-thickness.Further, a side of described workbench is provided with guide plate, so that add location and the feeding guiding in man-hour.

A preferred version of the present utility model, wherein, described workbench place is provided with chip discharger, and this chip discharger comprises the outer cover covering in outside contour wheel, the suction airduct being connected with outer cover and the blower fan being connected with suction airduct.Further, be connected with another suction airduct on described blower fan, the entrance of this suction airduct is right against described working space.

A preferred version of the present utility model, wherein, described regulating wheel is provided with tensioning apparatus, this tensioning apparatus is: described regulating wheel is arranged on fork, lower end and the frame of this fork are hinged, between this fork and frame, be provided with tension spring, this tension spring produces under normality and makes regulating wheel be positioned at the pulling force of operating position fork; Described fork is provided with the pressing lever for fork is depressed downwards.Its operation principle is: in the time of need to changing abrasive band, press pressing lever downwards, make to swing and drive regulating wheel to move downward, the triangle girth consisting of arcuate surface, power wheel and the regulating wheel of contour wheel dwindles, and now can pack or take out abrasive band into, again installs behind abrasive band, unclamp pressing lever, under tension spring effect, swing arm returns to operating position ，Jiang abrasive band tensioning.

A preferred version of the present utility model, wherein, on described regulating wheel, be connected with for impelling abrasive band swing mechanism of slippage back and forth on regulating wheel, this swing mechanism comprises drive motors, the eccentric wheel, connecting rod and the swing arm that are connected with drive motors output shaft, wherein, one end and the eccentric wheel of connecting rod are hinged, and one end of the other end and swing arm is hinged; In described regulating wheel, be provided with and wave axle sleeve, this waves between axle sleeve and regulating wheel and is provided with bearing, and this waves and in axle sleeve, is provided with fixed axis, this fixed axis and wave between axle sleeve and there is swing gap, and the end of this fixed axis is fixedly connected with frame; Described fixed axis and wave and be equipped with swing bearing pin between axle sleeve, this swing axis of bearing pin and the axis of fixed axis vertical; The other end of described swing arm with described in wave axle sleeve and be fixedly connected with.

A preferred version of the present utility model, wherein, described power set comprise motor, between these power set and power wheel, by belt gear, are connected.

Operation principle of the present utility model is: under the drive of power set, power wheel rotates, drive sand belt encircling contour wheel, power wheel and regulating wheel motion, now get and used the rough machined stall bars of sawing machine, and the bottom surface of stall bars and workbench are adjacent to, by stall bars end from processing space push and march forward to, owing to being positioned at the external diameter in the abrasive band on contour wheel, equate with the radius of the upper radius arc face of stall bars, abrasive band just can accurately process the upper radius arc face of stall bars like this.

The utility model compared with prior art has following beneficial effect:

1, by power set, provide processing dynamics, workman only need be pushed into the end of stall bars in processing space and take out and can complete processing subsequently, and operating efficiency improves greatly, and labour intensity also greatly reduces.

2, adopt abrasive band to carry out grinding, arc surface surface there will not be the phenomenon of tearing along grain direction, can not leave pitting on arc surface surface, and suface processing quality is promoted greatly.

3, the length in abrasive band can arrange longlyer, so just need not change continually abrasive band, has saved the time.

4,, because the radius of radius arc face in stall bars is little, for example R175mm, only needs the cylinder that adopts a diameter to be about 350mm can realize profiling; In conjunction with this feature, the utility model is selected rotating contour wheel, and contour wheel in the course of work can be rotated together along with abrasive band, not only can reduce resistance, also can reduce the wearing and tearing of abrasive band to contour wheel.

Accompanying drawing explanation

Fig. 1 is the structural representation of piano soundboard and stall bars.

Fig. 2～Fig. 4 is the structural scheme of mechanism of a specific embodiment of the process equipment of the upper radius arc face of piano stall bars of the present utility model, and wherein, Fig. 2 is front view, and Fig. 3 is left view, and Fig. 4 is top view.

Fig. 5 is the enlarged drawing of the contour wheel part of first set processing assembly in Fig. 2.

Fig. 6 is the enlarged drawing of the tensioning apparatus of first set processing assembly in Fig. 2.

Fig. 7～Fig. 9 is the structural representation of the swing mechanism of the second cover processing assembly in Fig. 2, and wherein, Fig. 7 is front view, the left view that Fig. 8 is Fig. 7, the top view that Fig. 9 is Fig. 8.

In figure, Reference numeral is: 1 stall bars; Radius arc face in 1-1; 2 soundboards; 3 frames; 4a workbench; 4b workbench; 5a power wheel; 5b power wheel; 6a regulating wheel; 6b regulating wheel; 7a contour wheel; 7b contour wheel; 8a abrasive band; 8b abrasive band; 9a adjusting nut; 10a power set; 10b power set; 11a crossbeam; 11b crossbeam; 12a hinged seat; 13a supporting base; 14a belt; 15a pressing lever; 16a turning cylinder; 17a screw; 18a screw; 19a adjusting bolt; 20a guide plate; 21a jointed shaft; 22a adjusts backing plate; 23a fork; 24a tension spring; 25b drive motors; 26b eccentric wheel; 27b connecting rod; 28b swing arm; 29b fixed axis; 30b swings bearing pin; 31b waves axle sleeve; 32b bearing.In above-mentioned Reference numeral 4～32, after with the parts in the expression first set processing assembly of a, after with the parts in the expression second cover processing assembly of b; Only with a or only do not mark in the drawings with the another set of same parts of the expression of b.

The specific embodiment

Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited to this.

Referring to Fig. 2～Fig. 4, the process equipment of the upper radius arc face of piano stall bars of the present embodiment comprises frame 3 and two cover processing assemblies, and the formation of this two covers processing assembly is identical, and the first set processing assembly of take is below explained in detail as example.First set processing assembly comprises workbench 4a, power wheel 5a, regulating wheel 6a, rotating contour wheel 7a, abrasive band 8a and power set 10a, and wherein, described power set 10a is connected with power wheel 5a, and described contour wheel 7a is arranged in frame 3; Described abrasive band 8a is looped around power wheel 5a, regulating wheel 6a and the upper triangle that forms sealing of contour wheel 7a; Between described contour wheel 7a and workbench 4a, be formed with and add the processing space of man-hour for allowing stall bars end push; The external diameter that is positioned at the abrasive band 8a of contour wheel 7a equates with the radius of the upper radius arc face of stall bars.

Referring to Fig. 2～Fig. 5, in described frame 3, be fixedly connected with the crossbeam 11a that lateral inclination arranges, described contour wheel 7a and power wheel 5a are separately positioned on the two ends, left and right of this crossbeam 11a, wherein, between contour wheel 7a and power wheel 5a and crossbeam 11a, be equipped with bearing, during work, contour wheel 7a rotates around turning cylinder 16a with respect to crossbeam 11a, can reduce like this friction between contour wheel 7a and abrasive band 8a, extends the service life of contour wheel 7a.Described crossbeam 11a not only can connect contour wheel 7a and power wheel 5a, but also can strengthen the rigidity of structure of frame 3.On described power wheel 5a, be coaxially provided with driven pulley, described power set 10a comprises motor, the output shaft of this motor is connected with power wheel 5a by belt gear, and this belt gear forms by being located at driving pulley, the belt 14a on the output shaft of motor and the driven pulley being located on power wheel 5a.

Referring to Fig. 2～Fig. 4, Fig. 6 and Fig. 7, described regulating wheel 6a is arranged on the top of frame 3, this regulating wheel 6a is provided with tensioning apparatus, this tensioning apparatus is: described regulating wheel 6a is arranged on fork 23a, lower end and the frame 3 of this fork 23a are hinged, between this fork 23a and frame 3, are provided with tension spring 24a; This tension spring 24a produces under normality and makes regulating wheel 6a be positioned at the pulling force of operating position fork 23a; Described fork 23a is provided with the pressing lever 15a for fork 23a is depressed downwards.Its operation principle is: in the time of need to changing abrasive band 8a, press pressing lever 15a downwards, make fork 23a drive regulating wheel 6a to move downward, the triangle girth consisting of contour wheel 7a, power wheel 5a and regulating wheel 6a dwindles, now can pack or take out abrasive band 8a into, again install after the 8a of abrasive band, unclamp pressing lever 15a, under tension spring 24a effect, fork 23a returns to ，Jiang abrasive band, operating position 8a tensioning (in Fig. 7 dotted line partial display in the second cover processing assembly the structure of regulating wheel 6b after moving downward).Above-mentioned replacing abrasive band workman of 8a process can complete voluntarily, convenient and swift.

Referring to Fig. 5, described workbench 4a is connected with frame 3 in the following manner: frame 3 is provided with supporting base 13a, the side of this supporting base 13a is fixedly connected with frame 3, top is fixedly connected with and is adjusted backing plate 22a by screw 17a, one end of described workbench 4a is hinged on one end of this adjustment backing plate 22a by jointed shaft 21a, particularly, described jointed shaft 21a is arranged in hinged seat 12a, and this hinged seat 12a is fixed on one end of adjusting backing plate 22a by screw 18a; Between the other end of the other end of workbench 4a and adjustment backing plate 22a, be provided with adjusting bolt 19a, one end of this adjusting bolt 19a is supported on to be adjusted on backing plate 22a, the other end extend in the tune hole of workbench 4a, this adjustment bolt 19a is provided with nut 9a, and this nut 9a is pressed on the bottom surface of workbench 4a.Like this, the one end that is equivalent to workbench 4a is bearing in described nut 9a above, by rotating this nut 9a, can make workbench 4a rotate around jointed shaft 22a, thereby the working space between contour wheel 7a and workbench 4a is finely tuned, to adapt to the processing of the stall bars of different-thickness.A side of described workbench 4a is provided with guide plate 20a, and in process, in order to raise the efficiency, operator is conventionally by the 1 side-by-side disposable processing of many root wood; Arrange after this guide plate 20a, workman can be close on guide plate 20a one of outside in many roots wood 1, and along guide plate 20a march forward to, so not only can make many roots wood 1 mutually be close to, and can not be offset because of grinding force in feeding process, working (machining) efficiency can be improved, also crudy can be guaranteed.

Described workbench 4a place is provided with chip discharger, and this chip discharger comprises the outer cover covering in outside contour wheel 7a, the suction airduct being connected with outer cover and the blower fan being connected with suction airduct.The object that this chip discharger is set is, in process because grinding stall bars can produce a lot of chips, if not the unified collection of these chips, chip can fly upward everywhere, pollute working environment, by this chip discharger is set, by these debris-suction and focus on, prevent contaminated environment.The effect of outer cover is to collect chip, prevents that it from waving, and the effect of suction airduct and blower fan is these chips to discharge and collect.Because the below of contour wheel 7a is for for pushing the working space of stall bars 1, therefore described outer cover can not extend to working space place, that is working space is communicated with space outerpace, in process, part chip also can wave in space outerpace from this like this, in order to address this problem, on described blower fan, be connected with another suction airduct, the entrance of this suction airduct is right against described working space.

Referring to Fig. 2～Fig. 4, the structure of the second cover processing assembly of present embodiment forms identical with first set processing assembly, comprises workbench 4b, power wheel 5b, regulating wheel 6b, contour wheel 7b, abrasive band 8b, power set 10b and crossbeam 11b etc.In described two cover processing assemblies, before and after the second cover processing assembly and first set processing assembly, arrange, and on front view (being Fig. 2), two cover processing assemblies are and are symmetrically arranged, make two workbench 4a, 4b in two cover processing assemblies be arranged on the left and right sides, the cross-shaped front and back of two abrasive band 8a, 8b in two cover processing assemblies arrange.Every suit processing assembly all can independently complete the processing of the upper radius arc face of stall bars, is conducive to like this raise the efficiency, save space; Only need utilize the space of a set of processing assembly that two cover processing assemblies just can be set, utilize fully space; Workman operates in the left and right sides respectively, is independent of each other, and makes full use of space, has improved operating efficiency.

In the utility model, abrasive band 8a is when work, if immobilized with power wheel 5a, regulating wheel 6a and the relative position of contour wheel 7a on width, in the upper radius arc face of stall bars process, always contact with a region on the 8a length direction of abrasive band so, form a wire grinding track, 8a other regions in abrasive band are not utilized, and abrasive band 8a is easily worn, and service life is short.In order to solve this technical problem, on described regulating wheel 6a, be connected with for impelling abrasive band 8a swing mechanism of slippage back and forth on regulating wheel 6a.The regulating wheel 6b of take here in the second cover processing assembly is example, and the composition of this swing mechanism is described.

Referring to Fig. 7～Fig. 9, this swing mechanism comprises drive motors 25b, eccentric wheel 26b, the connecting rod 27b and the swing arm 28b that are connected with drive motors 25b output shaft, and wherein, one end of connecting rod 27b and eccentric wheel 26b are hinged, and one end of the other end and swing arm 28b is hinged; In described regulating wheel 6a, be provided with and wave axle sleeve 31b, this waves between axle sleeve 31b and regulating wheel 6a and is provided with bearing 32b, this waves and in axle sleeve 31b, is provided with fixed axis 29b, this fixed axis 29b and wave between axle sleeve 31b and there is swing gap, and the end of this fixed axis 29b is fixedly connected with frame 3; Described fixed axis 29b and wave to be equipped with between axle sleeve 31b and swing bearing pin 30b, this axis that swings bearing pin 30b is vertical with the axis of fixed axis 29b; The other end of described swing arm 28b with described in wave axle sleeve 31b and be fixedly connected with; The outer surface of described regulating wheel 6a is cydariform (appearance of regulating wheel 6a is one deck rubber layer, and the outer surface of this rubber layer is cydariform).Its operation principle is: drive motors 25b drives swing arm 28b by eccentric wheel 26b and connecting rod 27b and waves axle sleeve 31b and swings back and forth around swinging bearing pin 30b, fixed axis 29b and the swing gap of waving between axle sleeve 31b provide space for waving the swing of axle sleeve 31b, regulating wheel 6a swings in horizontal plane with waving the swing of axle sleeve 31b, because the outer surface of regulating wheel 6b is cydariform, abrasive band 8b just can broad ways slippage back and forth on regulating wheel 6b like this, thereby make abrasive band 8b also come to return slippage along width at power wheel 5b and contour wheel 7b, thereby can utilize the zones of different of abrasive band 8a to process the upper radius arc face of stall bars, prevent that abrasive band 8a from crossing quick-wearing, extended the service life of abrasive band 8a.Meanwhile, due to constantly slippage back and forth of abrasive band 8b, can on the upper radius arc face of stall bars 1, form the grinding vestige of reticulate pattern, be conducive to improve suface processing quality; And this movement locus of abrasive band 8b is also conducive to it from sharp and heat radiation, result of use and the service life of improving abrasive band 8b.

Above-mentioned is preferably embodiment of the utility model; but embodiment of the present utility model is not subject to the restriction of foregoing; other any do not deviate from change, the modification done under Spirit Essence of the present utility model and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection domain of the present utility model.

Claims (10)

1. the process equipment of the upper radius arc face of piano stall bars, it is characterized in that, comprise frame, workbench, power wheel, regulating wheel, rotating contour wheel, abrasive band and power set, wherein, described power set are connected with power wheel, and described contour wheel is arranged in frame; Described sand belt encircling forms the triangle of sealing on power wheel, regulating wheel and contour wheel; Between described contour wheel and workbench, be formed with and add the processing space of man-hour for allowing stall bars end push; The external diameter that is positioned at the abrasive band on contour wheel equates with the radius of the upper radius arc face of stall bars.

2. the process equipment of the upper radius arc face of piano stall bars according to claim 1, it is characterized in that, described process equipment comprises two cover processing assemblies, and every suit processing assembly comprises described workbench, power wheel, regulating wheel, contour wheel, abrasive band and power set.

3. the process equipment of the upper radius arc face of piano stall bars according to claim 2, it is characterized in that, two overlap processing assemblies front and back arranges, and two workbench in two cover processing assemblies are arranged on the left and right sides, two abrasive bands cross-shaped front and back setting in two cover processing assemblies.

4. according to the process equipment of the upper radius arc face of piano stall bars described in claim 1～3 any one, it is characterized in that, described workbench is connected with frame in the following manner: frame is provided with supporting base, the side of this supporting base is fixedly connected with frame, top is provided with adjustment backing plate, one end of described workbench is hinged on one end of this adjustment backing plate by jointed shaft, between the other end of the other end of workbench and adjustment backing plate, be provided with adjusting bolt, one end of this adjusting bolt is supported on to be adjusted on backing plate, the other end extend in the tune hole of workbench, this adjustment bolt is provided with nut, this nut is pressed on the bottom surface of workbench.

5. the process equipment of the upper radius arc face of piano stall bars according to claim 4, is characterized in that, a side of described workbench is provided with guide plate.

6. the process equipment of the upper radius arc face of piano stall bars according to claim 1, it is characterized in that, described workbench place is provided with chip discharger, and this chip discharger comprises the outer cover covering in outside contour wheel, the suction airduct being connected with outer cover and the blower fan being connected with suction airduct.

7. the process equipment of the upper radius arc face of piano stall bars according to claim 6, is characterized in that, is connected with another suction airduct on described blower fan, and the entrance of this suction airduct is right against described working space.

8. according to the process equipment of the upper radius arc face of piano stall bars described in any one in claim 1～3,5～7, it is characterized in that, described regulating wheel is provided with tensioning apparatus, this tensioning apparatus is: described regulating wheel is arranged on fork, lower end and the frame of this fork are hinged, between this fork and frame, be provided with tension spring, this tension spring produces under normality and makes regulating wheel be positioned at the pulling force of operating position fork; Described fork is provided with the pressing lever for fork is depressed downwards.

9. according to the process equipment of the upper radius arc face of piano stall bars described in any one in claim 1～3,5～7, it is characterized in that, on described regulating wheel, be connected with for impelling abrasive band swing mechanism of slippage back and forth on regulating wheel, this swing mechanism comprises drive motors, the eccentric wheel, connecting rod and the swing arm that are connected with drive motors output shaft, wherein, one end and the eccentric wheel of connecting rod are hinged, and one end of the other end and swing arm is hinged; In described regulating wheel, be provided with and wave axle sleeve, this waves between axle sleeve and regulating wheel and is provided with bearing, and this waves and in axle sleeve, is provided with fixed axis, this fixed axis and wave between axle sleeve and there is swing gap, and the end of this fixed axis is fixedly connected with frame; Described fixed axis and wave and be equipped with swing bearing pin between axle sleeve, this swing axis of bearing pin and the axis of fixed axis vertical; The other end of described swing arm with described in wave axle sleeve and be fixedly connected with.

10. the process equipment of the upper radius arc face of piano stall bars according to claim 1, is characterized in that, described power set comprise motor, between these power set and power wheel, by belt gear, is connected.

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