CN204566742U - The rotary shaft hammerhead squeezer of processing two cover hammerhead - Google Patents
The rotary shaft hammerhead squeezer of processing two cover hammerhead Download PDFInfo
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- CN204566742U CN204566742U CN201520009838.7U CN201520009838U CN204566742U CN 204566742 U CN204566742 U CN 204566742U CN 201520009838 U CN201520009838 U CN 201520009838U CN 204566742 U CN204566742 U CN 204566742U
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- hammerhead
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Abstract
The utility model relates to the rotary shaft hammerhead squeezer that hammerhead is overlapped in processing two, comprises frame, axis, bed die, left side pressing mold, right side pressing mold, up and down press mechanism, left and right press mechanism; Bed die, left side pressing mold, right side pressing mold, the up and down quantity of press mechanism are two groups, are symmetrical arranged up and down centered by axis; In the upper end of axis, a bed die is fixed on axis, and upper and lower press mechanism is relative with axis to be fixed and is positioned at directly over bed die, and on the left of in the of one, on the right side of pressing mold and, pressing mold lays respectively at upper left side and the upper right side of bed die; Drive the left and right press mechanism of left side pressing mold and the translation in the lateral direction of right side pressing mold relative with axis fixing; The rear and front end rotary type of axis is arranged in frame.The utility model has once can add two cover hammerheads, and production efficiency is high, and structure is simple, easy to operate, save the energy, cost is low, floor space is little advantage, belongs to piano parts making apparatus technical field.
Description
Technical field
The utility model relates to piano parts making apparatus, specifically, relates to a kind of rotary shaft hammerhead squeezer of processing two cover hammerhead.
Background technology
Piano hammerhead is that it comprises hammerhead reel and felt for hitting the important spare part of string in piano.The head of hammerhead reel is sharper, and felt is wrapped in head.The afterbody of hammerhead reel is rectangular.
Hammerhead generally obtains by the following method: the left and right sides of elongated wooden workpiece (cube) is cut into given shape near one end of head, obtains the hammerhead reel of strip, and afterbody is without the need to cutting; One monoblock felt squeezing is fixed on the head of whole piece reel; Block reel and felt along cross section, obtain a complete set totally 88 hammerheads of a piano.
The hammerhead of the piano of one whole piece has following features: shape of cross section is medianly zygomorphic; Along the length direction of workpiece, surface has the gradient of certain gradual change, and namely bass Duanmu core is wider than high pitch Duanmu core.
In prior art, the squeezing of hammerhead generally adopts the mode of oil pressure: be placed in bed die by a monoblock felt, hydraulic press controls upper and lower press mechanism and presses down inverted hammerhead reel, other two cover hydraulic presses control left and right press mechanism and are compressed by the hammerhead reel of two side forms to centre, carry out pressurize again after felt compresses by bed die and side form.As CN202922998U discloses piano hammerhead shaping hydraulic press, comprising: dip mold mechanism, side pressure mold mechanism, bed die and operation control dial plate; Dip mold mechanism comprises high pitch end down pressing oil cylinder and bass end down pressing oil cylinder, and the lower end of these two down pressing oil cylinder connects the two ends of reel pressing plate by connecting lug, and the lower end of reel pressing plate connects reel fixture, this reel holder hammerhead reel; Arrange bed die immediately below this dip mold mechanism, this bed die is fixed by bed die fixed head, and the two ends of these two side form fixed heads connect high pitch side compressing cylinder and bass side compressing cylinder respectively by connecting lug.
Existing piano hammerhead shaping hydraulic press has following shortcoming: 1. an equipment once only can process a set of hammerhead.2. adopt the mode of oil pressure to squeeze, the position of oil cylinder needs to keep fixing with frame, cannot arrange flexibly.3. because the expressing process dwell time is longer, according to the mode pressurize of oil pressure, hydraulic press will be held open, consume electric power, increases cost of manufacture.4. the side pressure mold mechanism of dip mold mechanism, both sides all will use oil cylinder, and an equipment is at least equipped with four with upper cylinder, equipment bulky, and floor space is large.5. the cost of equipment is high.6. will often safeguard, cleaning fluid pressure line, must ensure there is oil impregnate phenomenon.
Utility model content
For the technical problem existed in prior art, the purpose of this utility model is: the rotary shaft hammerhead squeezer providing a kind of processing two cover hammerhead, once can squeeze two cover hammerheads, greatly enhance productivity.
In order to achieve the above object, the utility model adopts following technical scheme:
The rotary shaft hammerhead squeezer of processing two cover hammerhead, comprises frame, axis, bed die, left side pressing mold, right side pressing mold, up and down press mechanism, left and right press mechanism; Bed die, left side pressing mold, right side pressing mold, the up and down quantity of press mechanism are two groups, are symmetrical arranged up and down centered by axis; In the upper end of axis, a bed die is fixed on axis, and upper and lower press mechanism is relative with axis to be fixed and is positioned at directly over bed die, and on the left of in the of one, on the right side of pressing mold and, pressing mold lays respectively at upper left side and the upper right side of bed die; Drive the left and right press mechanism of left side pressing mold and the translation in the lateral direction of right side pressing mold relative with axis fixing; The rear and front end rotary type of axis is arranged in frame.After adopting this structure, upper and lower press mechanism, left and right press mechanism, bed die, left side pressing mold, right side pressing mold all rotate in frame with axis; When operating a set of hammerhead (placement containing the fixing of hammerhead reel and felt), side to be operated is turned to top, operate rear upset down, opposite side overturns upward simultaneously, then operates this side.
Left and right press mechanism comprises longitudinal screw, left side briquetting, right side briquetting; Left side briquetting clamps the left side of axis and along the slippage of axis left and right, upper right, the bottom righthand side of left side briquetting connect from different left side pressing molds respectively; Right side briquetting clamps the right side of axis and along the slippage of axis left and right, upper left, the lower-left end of right side briquetting connect from different right side pressing molds respectively; Longitudinal screw is arranged along left and right directions, and middle part is through axis, and left section coordinates with the internal thread hole of left side briquetting, and right section coordinates with the internal thread hole of right side briquetting; The thread rotary orientation of the left side internal thread hole of briquetting and the internal thread hole of right side briquetting is contrary.After adopting this structure, by rotating longitudinal screw, manpower is rotated the translation becoming left side briquetting and right side briquetting, because left and right side thread rotary orientation is contrary, the translation direction of left and right side briquetting is also contrary, matched moulds or die sinking simultaneously.A longitudinal screw can control die sinking or the matched moulds of upper and lower two cover side pressure moulds, easy to operate.
The quantity of left and right press mechanism is many groups, is arranged in rows along fore-and-aft direction is mutually arranged side by side.After adopting this structure, ensure the Multipoint Uniform pressurized of hammerhead.
The upper and lower end face of axis is plane, and two bed dies embed upper surface and the lower surface of axis respectively in the position of center ofthe; Left side briquetting clamps upper surface and the lower surface of axis from left side, right side briquetting clamps upper surface and the lower surface of axis from right side.After adopting this structure, plane can ensure the clamping left side briquetting of axis and the steady slippage of right side briquetting, and structure is simple, convenient and reliable operation.
Upper and lower press mechanism comprises radial compaction frame, the first radial screw mandrel, the first screw mandrel nut, fixed block, crossbeam, side locating piece; Radial compaction frame is fixed on axis, and the first screw mandrel nut is arranged on radial compaction frame, and the first radial screw mandrel is along vertical direction through the first screw mandrel nut, and the first radial screw mandrel, fixed block, crossbeam set gradually, and crossbeam drives hammerhead upward-downward translation; The left and right sides of crossbeam is all connected to side locating piece, and the other end of side locating piece radially compresses the upper and lower slippage of the gathering sill that frame is arranged.After adopting this structure, the operation principle of upper and lower press mechanism is: rotate the first radial screw mandrel, and the first radial screw mandrel drives fixed block, crossbeam and hammerhead upward-downward translation, and hammerhead holds out against bed die, provides upper and lower clamping force.During upward-downward translation, crossbeam is led by side locating piece and gathering sill cooperation.By the clamping force up and down that artificial rotation process provides hammerhead to squeeze, structure is simple, easy to operate.
Upper and lower press mechanism comprises many second radial screw mandrels, and the radial screw mandrel of each root second is all arranged on radial compaction frame the second screw mandrel nut with one coordinates; Second radial screw mandrel and the first radial screw mandrel are parallel to each other and are arranged in rows along fore-and-aft direction; Second radial screw mandrel be just free end to one end of crossbeam.After adopting this structure, the first radial screw mandrel drives crossbeam upper and lower translation, after moving to below, divides multiple spot to exert pressure to crossbeam by many second radial screw mandrels, ensures the uniform stressed of hammerhead.The lower end of the second radial screw mandrel is free end, ensures that crossbeam is only freely elevated with the first radial screw mandrel, is easy to operation.
The lower end, the left and right sides of crossbeam is all provided with fixed guide block, and it is the T-slot of T-shaped that the lower end of two fixed guide blocks and crossbeam forms cross section; Hammerhead clamping is hung on mould at the hammerhead that cross section is T-shaped, and the upper end that hammerhead hangs mould snaps in its corresponding T-slot of shape.After adopting this structure, hammerhead is arranged on hammerhead and hangs after mould, and hammerhead is hung mould and inserted from the front end of T-slot or rear end, quick and easy for installation.
The radial compaction frame of about two groups press mechanisms is integral, front apparent direction is rectangular frame; Portion is played on the ridge that the left side of axis and right side are equipped with protrusion, and radial compaction frame is fixed on ridge and rises in portion.After adopting this structure, structure is simple, easy for installation.
Axis is fixed in frame by two positioning shaft sleeves.After adopting this structure, structure is simple, and easy for installation, the axis of axis is arranged along fore-and-aft direction, and axis is around axis rotation.
The left side of frame and right side are respectively provided with a pair anti-rotation rest pad, place an anti-bull stick preventing central axis arranged along fore-and-aft direction between often pair of anti-rotation rest pad.After adopting this structure, avoid upset when operating and have an accident.
Generally speaking, the utility model tool has the following advantages: once can add two cover hammerheads, production efficiency is high, and structure is simple, easy to operate, save the energy, cost is low, floor space is little.
Accompanying drawing explanation
Fig. 1 is the right view that the rotary shaft hammerhead squeezer of hammerhead is overlapped in processing two, and part radial compaction frame is not shown.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the front view that the rotary shaft hammerhead squeezer of hammerhead is overlapped in processing two.
Fig. 4 is the sectional view that the rotary shaft hammerhead squeezer of hammerhead is overlapped in processing two.
Fig. 5 is the right view of axis.
Fig. 6 is the top view of Fig. 5.
Fig. 7 is the front view of axis.
Fig. 8 is the front view of radial compaction frame.
Fig. 9 is the assembly relation front view of radial compaction frame and axis.
Figure 10 is the assembly relation front view of left and right press mechanism and axis.
Figure 11 is the assembly relation right view of axis, radial compaction frame, left and right press mechanism.
Wherein, 1 is handwheel, 2 is the first radial screw mandrel, 3 is the first screw mandrel nut, 4 is left side briquetting, 5 is right side briquetting, 6 is anti-bull stick, 7 is anti-rotation rest pad, 8 is fixed block, 9 is the second radial screw mandrel, 10 is the second screw mandrel nut, 11 is crossbeam, 12 is fixed guide block, 13 is hammerhead extension mould, 14 is left side pressing mold, 15 is right side pressing mold, 16 is bed die, 17 is side locating piece, 18 is longitudinal screw, 19 is radial location card, 20 is frame, 21 is positioning shaft sleeve, 22 is axis, 23 is radial location block, 24 is set screw, 25 is upper radial location block, 26 is radial compaction frame, 27 is internal fixtion block, 28 is hammerhead.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in more detail.
The rotary shaft hammerhead squeezer of processing two cover hammerhead comprises: frame, axis, bed die, left side pressing mold, right side pressing mold, up and down press mechanism, left and right press mechanism.
The upper surface of axis is identical with lower surface structure, is plane, and the center ofthe position of upper and lower end face is all offered a bar-shaped trough and installed for bed die.The left side of axis is also identical with right side structure, and main body is plane, and in plane, portion is played, for the installation of radial compaction frame in four ridges of protruding that are provided with at interval.Be provided with about five through holes run through in axis, pass for longitudinal screw, through hole should stagger with the ridge portion of rising.The two ends of axis are fixed in frame by two positioning shaft sleeves, thus axis can rotate in frame, and the two ends of axis are also equipped with radial location card and are carried out axial location to axis.Axis is respectively socketed an annular radial location block near the position at two ends, keep supplying lower press mechanism and press down spacing.The length direction of axis is arranged along fore-and-aft direction.
The quantity of bed die is two, and be separately fixed in the bar-shaped trough of upper and lower end face of axis, length direction is arranged along fore-and-aft direction.The end of bed die and upper and lower end are in the face of neat.
The quantity of left side pressing mold is two, a left upper end being positioned at axis, and a lower-left end being positioned at axis, all along the surperficial left and right slippage of axis.Length direction is arranged along fore-and-aft direction.
The quantity of right side pressing mold is two, a upper right side being positioned at axis, and a bottom righthand side being positioned at axis, all along the surperficial left and right slippage of axis.Length direction is arranged along fore-and-aft direction.
Upper and lower press mechanism has two groups, and structure is identical, is symmetrical arranged up and down centered by axis.Upper and lower press mechanism comprises four radial compaction frames (two groups being pressed press mechanism share), a first radial screw mandrel, a first screw mandrel nut, three second radial screw mandrels, three the second screw mandrel nuts, a fixed block, crossbeam, four offside locating pieces, a pair fixed guide block.Radial compaction frame is rectangle frame, is threaded connection the ridge being fixed on axis and plays portion, the gathering sill being provided with offside locating piece guiding of internal symmetry.Second screw mandrel nut be fixed on shown in Fig. 1 from left to right first and second, in four radial compaction frames, the second radial screw mandrel through the second screw mandrel nut along vertical direction, rotates the upper end of the second radial screw mandrel, can realize its upper and lower translation.First screw mandrel nut is fixed on the 3rd the radial compaction frame from left to right shown in Fig. 1, and the first radial screw mandrel through the first screw mandrel nut along vertical direction, rotates the upper end of the first radial screw mandrel, can realize its upper and lower translation.Fixed block comprises internal fixtion block and extenal fixation block; Internal fixtion block comprise one section of diameter circular shaft little than the first radial screw mandrel being positioned at top and one section be positioned at below the diameter disk larger than circular shaft; Internal fixtion block to embed in extenal fixation block with it in the corresponding holddown groove of shape, and the upper end of circular shaft is protruding upward in extenal fixation block; The lower end integrated setting of the upper end of circular shaft and the first radial screw mandrel, lower end and the crossbeam of extenal fixation block are fixed.The length direction of crossbeam is arranged along fore-and-aft direction, the monosymmetric installation four offside locating piece of crossbeam, outboard end slippage guiding in the gathering sill of radial compaction frame of side locating piece.The lower end, left side being arranged on crossbeam of fixed guide block symmetry and lower end, right side, it is the T-slot of T-shaped that the lower end of two fixed guide blocks and crossbeam forms cross section, and the hammerhead for clamping hammerhead hangs mould hanging.The front-end and back-end of crossbeam are all provided with radial location block, upper radial location block are installed vertical set screw down, coordinate hammerhead lower limit with the radial location block that axis is installed.
The quantity of left and right press mechanism is five groups, arranges along fore-and-aft direction interval.Left and right press mechanism comprises: longitudinal screw, left side briquetting, right side briquetting.Left side briquetting stretches out upper and lower two-arm, the left side of clamping axis, and the end of upper and lower two-arm connects with upper and lower two left side pressing molds respectively and drives its left and right slippage.Right side briquetting stretches out upper and lower two-arm, the right side of clamping axis, and the end of upper and lower two-arm connects with upper and lower two right side pressing molds respectively and drives its left and right slippage.Longitudinal screw is arranged along left and right directions; middle part is through the through hole of axis; left section coordinates with the internal thread hole of left side briquetting; right section coordinates with the internal thread hole of right side briquetting; wherein the rotation direction of the internal thread hole of left and right side briquetting is contrary; thus when rotating longitudinal screw, the moving direction of left and right side briquetting is contrary, realizes coordinated type die sinking or matched moulds.Set screw is all equipped with in the inside of left and right side briquetting, and left end or the right-hand member of axis are withstood in the end of set screw, the length that adjustment set screw stretches out, and can limit die-closed position.
A pair anti-rotation rest pad is respectively installed on the left side of frame and right side, and the often pair of anti-rotation rest pad is placed and the anti-bull stick that arranges along fore-and-aft direction of hook one.When the first radial screw mandrel vertically erects, two anti-bull sticks withstand left side and the right side of radial compaction frame respectively.
The outside of the first radial screw mandrel, the second radial screw mandrel, longitudinal screw is equipped with screw thread, coordinates with handwheel, can screw labour-saving.The rotary shaft hammerhead squeezer of a processing two cover hammerhead only need be equipped with a handwheel.
Set temperature, pressure sensor in the rotary shaft hammerhead squeezer of processing two cover hammerhead, measure squeezing condition in real time.
Hammerhead reel, along its length direction, is basso, alto and high line successively, and the bottom-up clamping of hammerhead reel is hung on mould at the hammerhead that cross section is T-shaped, and hammerhead hangs mould hanging in T-slot.After clamping completes, the radial compaction frame (containing the first radial screw mandrel, the second radial screw mandrel) of the side of corresponding basso and the density of left and right press mechanism are greater than the side of high line, to obtain larger clamping force.
Operating process is as follows:
(1) first clamping is positioned at the hammerhead of upside, is had by clamping the hammerhead of whole piece hammerhead reel (being hammerhead reel before undressed, is hammerhead after press felt) to hang mould and pushes in T-slot from the front end of T-slot.
(2) on the bed die of upside, monoblock felt is placed.
(3) handwheel is placed in the first radial screw mandrel, rotates handwheel, the first radial screw mandrel drives crossbeam and hammerhead to hang mould and moves downward, and hammerhead reel withstands felt; Be placed in by handwheel on the second radial screw mandrel, rotate handwheel, the free end of the second radial screw mandrel declines, and hold out against crossbeam, hammerhead reel holds out against felt; Operate all second radial screw mandrels successively, until the set screw of the upper radial location block of the front-end and back-end of crossbeam, coordinate with the radial location block that axis is installed.
(4) anti-bull stick is taken out, unlock, central axis, upper and lower side is exchanged, more anti-bull stick is placed between anti-rotation rest pad again locks.
(5) step (1)-(3) are repeated, the another set of hammerhead reel of radial compaction and felt.
(6) handwheel is placed in longitudinal screw, rotates handwheel, left and right side briquetting drives left and right side pressing mold matched moulds simultaneously, by hammerhead reel and felt clamping; Operate all longitudinal screws successively.
(7) pressurize is to the set time, just hammerhead is taken out until warning light lights, left and right press mechanism is first opened during taking-up, open the upper and lower press mechanism in upside again and hammerhead is hung mould taking-up together with hammerhead, upset axis, hammerhead is hung mould taking-up together with hammerhead by the press mechanism up and down finally opening opposite side, completes the squeezing of two cover hammerheads thus.
Above-described embodiment is the utility model preferably embodiment; but embodiment of the present utility model is not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present utility model and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection domain of the present utility model.
Claims (10)
1. process the rotary shaft hammerhead squeezer of two cover hammerheads, comprise frame, axis, bed die, left side pressing mold, right side pressing mold, up and down press mechanism, left and right press mechanism, it is characterized in that: described in
Bed die, left side pressing mold, right side pressing mold, the up and down quantity of press mechanism are two groups, are symmetrical arranged up and down centered by axis;
In the upper end of axis, a bed die is fixed on axis, and upper and lower press mechanism is relative with axis to be fixed and is positioned at directly over bed die, and on the left of in the of one, on the right side of pressing mold and, pressing mold lays respectively at upper left side and the upper right side of bed die; Drive the left and right press mechanism of left side pressing mold and the translation in the lateral direction of right side pressing mold relative with axis fixing;
The rear and front end rotary type of axis is arranged in frame.
2. overlap the rotary shaft hammerhead squeezer of hammerhead according to processing two according to claim 1, it is characterized in that: described left and right press mechanism comprises longitudinal screw, left side briquetting, right side briquetting; Left side briquetting clamps the left side of axis and along the slippage of axis left and right, upper right, the bottom righthand side of left side briquetting connect from different left side pressing molds respectively; Right side briquetting clamps the right side of axis and along the slippage of axis left and right, upper left, the lower-left end of right side briquetting connect from different right side pressing molds respectively; Longitudinal screw is arranged along left and right directions, and middle part is through axis, and left section coordinates with the internal thread hole of left side briquetting, and right section coordinates with the internal thread hole of right side briquetting; The thread rotary orientation of the left side internal thread hole of briquetting and the internal thread hole of right side briquetting is contrary.
3. overlap the rotary shaft hammerhead squeezer of hammerhead according to processing two according to claim 2, it is characterized in that: the quantity of described left and right press mechanism is many groups, be arranged in rows along fore-and-aft direction is mutually arranged side by side.
4. overlap the rotary shaft hammerhead squeezer of hammerhead according to processing two according to claim 2, it is characterized in that: the upper and lower end face of described axis is plane, two bed dies embed upper surface and the lower surface of axis respectively in the position of center ofthe; Left side briquetting clamps upper surface and the lower surface of axis from left side, right side briquetting clamps upper surface and the lower surface of axis from right side.
5. overlap the rotary shaft hammerhead squeezer of hammerhead according to processing two according to claim 1, it is characterized in that: described upper and lower press mechanism comprises radial compaction frame, the first radial screw mandrel, the first screw mandrel nut, fixed block, crossbeam, side locating piece; Radial compaction frame is fixed on axis, and the first screw mandrel nut is arranged on radial compaction frame, and the first radial screw mandrel is along vertical direction through the first screw mandrel nut, and the first radial screw mandrel, fixed block, crossbeam set gradually, and crossbeam drives hammerhead upward-downward translation; The left and right sides of crossbeam is all connected to side locating piece, and the other end of side locating piece radially compresses the upper and lower slippage of the gathering sill that frame is arranged.
6. the rotary shaft hammerhead squeezer of hammerhead is overlapped according to processing two according to claim 5, it is characterized in that: described upper and lower press mechanism comprises many second radial screw mandrels, the radial screw mandrel of each root second is all arranged on radial compaction frame the second screw mandrel nut with one coordinates; Second radial screw mandrel and the first radial screw mandrel are parallel to each other and are arranged in rows along fore-and-aft direction; Second radial screw mandrel be just free end to one end of crossbeam.
7. overlap the rotary shaft hammerhead squeezer of hammerhead according to processing two according to claim 5, it is characterized in that: the lower end, the left and right sides of described crossbeam is all provided with fixed guide block, it is the T-slot of T-shaped that the lower end of two fixed guide blocks and crossbeam forms cross section; Hammerhead clamping is hung on mould at the hammerhead that cross section is T-shaped, and the upper end that hammerhead hangs mould snaps in its corresponding T-slot of shape.
8. overlap the rotary shaft hammerhead squeezer of hammerhead according to processing two according to claim 5, it is characterized in that: the radial compaction frame of described about two groups press mechanisms is integral, front apparent direction is rectangular frame; Portion is played on the ridge that the left side of axis and right side are equipped with protrusion, and radial compaction frame is fixed on ridge and rises in portion.
9. overlap the rotary shaft hammerhead squeezer of hammerhead according to processing two according to claim 1, it is characterized in that: described axis is fixed in frame by two positioning shaft sleeves.
10. the rotary shaft hammerhead squeezer of hammerhead is overlapped according to processing two according to claim 1, it is characterized in that: the left side of described frame and right side are respectively provided with a pair anti-rotation rest pad, between often pair of anti-rotation rest pad, place an anti-bull stick preventing central axis arranged along fore-and-aft direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520009838.7U CN204566742U (en) | 2015-01-05 | 2015-01-05 | The rotary shaft hammerhead squeezer of processing two cover hammerhead |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520009838.7U CN204566742U (en) | 2015-01-05 | 2015-01-05 | The rotary shaft hammerhead squeezer of processing two cover hammerhead |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204566742U true CN204566742U (en) | 2015-08-19 |
Family
ID=53859428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520009838.7U Withdrawn - After Issue CN204566742U (en) | 2015-01-05 | 2015-01-05 | The rotary shaft hammerhead squeezer of processing two cover hammerhead |
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| Country | Link |
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| CN (1) | CN204566742U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104527109A (en) * | 2015-01-05 | 2015-04-22 | 广州珠江钢琴集团股份有限公司 | Rotating shaft type hammer head presser for machining two hammer heads |
-
2015
- 2015-01-05 CN CN201520009838.7U patent/CN204566742U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104527109A (en) * | 2015-01-05 | 2015-04-22 | 广州珠江钢琴集团股份有限公司 | Rotating shaft type hammer head presser for machining two hammer heads |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150819 Effective date of abandoning: 20160420 |