CN102941442A - Static balance method for crushing knife toothholder - Google Patents

Abstract

The invention relates to a static balance method for a crushing knife toothholder, which is characterized by comprising the following steps: (1), marking an inner bore rough machining line and a boundary dimension line after alignment according to the boundary dimension of a cast piece of the crushing knife toothholder; (2), roughly machining the side surface and an inner bore of the cast piece; (3), balancing a core shaft for the first time according to the inner bore dimension required by technological allowance; (4), making static balance for the first time, if unbalance occurs, calculating the unbalance weight by visualizing a flitch in software, calculating the theoretical barycentric coordinate, marking the deviation direction of the unbalanced center, and determining the specific deviation dimension; (5) marking a center line of the inner bore again on the cast piece according to the specific deviation dimension; (6) aligning according to the center line of the inner bore, and finely machining the eccentric hole; and (7) carrying the final static balance process after the whole fine machining process is completely finished. With the adoption of the method, the machining efficiency of de-weight by static balance is improved, and the balance de-weight reliability is guaranteed.

Description

The static balancing method of crushing cutter toothholder

Technical field

The present invention relates to a kind of static balancing method of crushing cutter toothholder.

Background technology

The crushing cutter toothholder is as the main parts size in the wheeled type crusher broken shaft group, its version more complicated, and static balance is had relatively high expectations.Conventional crushing cutter toothholder static balancing method is: the whole manufacturing procedures of crushing cutter toothholder have been carried out carrying out static balance again, but because static balance goes important asking heavily to distinguish going, sometimes only directly process heavy can not meeting design requirement at uneven position, just need to go heavily by repeatedly processing this moment, really can't balance go also must use the method for pasting board welding weightening finish to realize static balance when heavy, have a strong impact on production efficiency, and there is potential safety hazard in the method for pasting board welding weightening finish.

Summary of the invention

The static balancing method that the purpose of this invention is to provide a kind of crushing cutter toothholder can improve static balance and go heavy operating efficiency, guarantees that balance goes heavy reliability.

A kind of static balancing method of crushing cutter toothholder, its special feature is, comprises the steps:

(1) marks endoporus roughing line and appearance and size line behind the foundry goods appearance and size centering by the crushing cutter toothholder;

(2) side of roughing foundry goods and endoporus, endoporus are machined to the technique allowance and require size;

(3) make the once balance mandrel by the interior hole dimension of technique allowance requirement;

(4) do a static balance, if imbalance then according to uneven position, weight, utilize CAD 3D area of computer aided view software, employing method of virtual pasting board in software is calculated uneven weight, theory of computation center-of-mass coordinate, and identify uneven off-centring direction, clearly be offset concrete size;

(5) on foundry goods, again draw inner hole centreline by the concrete size of skew, guarantee design drawing minimum wall thickness (MINI W.) size;

(6) press this eccentric orfice of inner hole centreline centering semifinishing;

(7) after whole finishing step is all finished, again carry out final fine balance operation and get final product.

The inventive method has been utilized CAD 3D area of computer aided view, adopt the method for virtual " pasting board " to calculate uneven weight, theory of computation center-of-mass coordinate, and identify uneven off-centring direction, clearly be offset concrete size, and by entity endoporus side-play amount endoporus be processed into eccentric orfice and reach balance and go heavy purpose.Adopt and to improve static balance after the inventive method and go heavy working (machining) efficiency, guarantee that balance goes heavy reliability.

Description of drawings

Accompanying drawing 1 is the structural representation of crushing cutter toothholder;

Accompanying drawing 2 is pack into structural representation behind the mandrel of crushing cutter toothholder;

Accompanying drawing 3 is made statically balanced schematic diagram for the crushing cutter toothholder at balancing stand;

Accompanying drawing 4 is the schematic diagram of crushing cutter toothholder static balance pasting board among the embodiment 1;

Accompanying drawing 5 is laid particular stress on schematic diagram for crushing cutter toothholder center among the embodiment 1;

Accompanying drawing 6 is that the amount schematic diagram is borrowed at crushing cutter toothholder center among the embodiment 1.

The specific embodiment

Embodiment 1:

Model is the static balancing method of 34P12-04 crushing cutter toothholder, comprises the steps:

(1) marks endoporus roughing line and appearance and size line at foundry goods behind the foundry goods appearance and size centering by the crushing cutter toothholder, and check whether each spot size processing capacity is even, each spot size processing capacity of foundry goods generally all stays 10mm, and deviation generally can think that with interior allowance is even at 5mm;

(2) side of rough turn foundry goods and endoporus on vertical lathe, drawing

Endoporus is machined to the technique allowance and requires size

(3) press

The interior hole dimension that the technique allowance requires is made for the first time (this crushing cutter toothholder will carry out twice balance altogether, and balance refers to the balance of carrying out after rough turn for the first time) balance mandrel;

(4) (the once balance mandrel is packed in the crushing cutter toothholder endoporus) and do for the first time static balance, if imbalance then according to uneven position, weight, draw the Casting Three-dimensional view with software first, recycling CAD 3D area of computer aided view software, employing method of virtual pasting board in software is calculated uneven weight, theory of computation center-of-mass coordinate, and identify uneven off-centring direction, clearly be offset concrete size.

Concrete operation is as follows:

1. after doing static balance, amount of unbalance is: 1.5375kg, at the heavy 1.5375kg (being uneven weight) of imbalance place pasting board, referring to Fig. 4;

2. survey the theoretical barycenter of 34P12-04 cutter tooth seat, the result is as follows:

Volume=93409930.619859233mm ³

Area=1896240.101737803mm ²

Quality=731.459067915kg

Weight=7173.169540021N

The radius of gyration=288.419422318mm

Barycenter=0.000000000,0.000000000.

3. survey the barycenter of (practical work piece) behind the theoretical cutter tooth seat of the 34P12-04 pasting board, the result is as follows:

Volume=93610826.693783864mm ³

Area=1922869.007721964mm ²

Quality=733.032211733kg

Weight=7188.596824771N

The radius of gyration=288.688852274mm

Barycenter=-0.415711127,0.709215481.

4. calculate centroid position coordinate behind the pasting board:

Off center is apart from being: C ²=X ²+ Y ²C ²=0.4157 ²+ 0.7092 ²C=0.8221;

The offset direction is: the line direction that (0.4157,0.7092) and O1 are ordered;

As shown in Figure 6: amount skew 0.8221mm is borrowed at the center, is the O2 center after measuring.

5. as shown below: amount skew 0.8221mm is borrowed at the center, is the O2 center after measuring.

(5) on foundry goods, again draw inner hole centreline by the concrete size 0.8221mm of the skew that obtains and offset direction, guarantee design drawing minimum wall thickness (MINI W.) size 115mm;

(6) by the inner hole centreline centering of drawing, at this eccentric orfice of first finish turning of vertical lathe (partly referring to semifinishing);

(7) after whole finishing step is all finished, carry out static balance second time operation and get final product.Balance method is identical with the routine intravenous balance method.Be about to pack into crushing cutter toothholder endoporus after the fine finishining of balance mandrel, put into balancing stand and adopt the removing repeat formula to carry out balance, this moment, uneven weight was considerably less, only heavyly just can finish smoothly the static balance operation through going for 1～2 time.

Claims (1)

1. the static balancing method of a crushing cutter toothholder is characterized in that, comprises the steps:

(1) marks endoporus roughing line and appearance and size line behind the foundry goods appearance and size centering by the crushing cutter toothholder;

(2) side of roughing foundry goods and endoporus, endoporus are machined to the technique allowance and require size;

(3) make the once balance mandrel by the interior hole dimension of technique allowance requirement;

(4) do a static balance, if imbalance then according to uneven position, weight, utilize CAD 3D area of computer aided view software, employing method of virtual pasting board in software is calculated uneven weight, theory of computation center-of-mass coordinate, and identify uneven off-centring direction, clearly be offset concrete size;

(5) on foundry goods, again draw inner hole centreline by the concrete size of skew, guarantee design drawing minimum wall thickness (MINI W.) size;

(6) press this eccentric orfice of inner hole centreline centering semifinishing;

(7) after whole finishing step is all finished, again carry out final fine balance operation and get final product.

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