CN108284199A - A kind of efficient casting technique of the simple vertical grinding roll cover of moulding - Google Patents

Abstract

The invention discloses a kind of efficient casting techniques of the simple vertical grinding roll cover of moulding.The feeding distance of the present invention is short, and without using chill, while total build height is short, compared to materials and the Production Time that traditional handicraft mold saves half.The riser of the present invention is more concentrated in middle portion temperature, and for the product yield of whole circle sand riser substantially 50% or so, 5 points of yield rate or so can be improved in casting technique of the invention.

Description

A kind of efficient casting technique of the simple vertical grinding roll cover of moulding

Technical field

The invention belongs to casting technology fields, are related to a kind of casting technique of vertical grinding roll cover, and in particular to a kind of moulding letter The casting technique of vertical grinding roll cover single, without chill.

Background technology

Constantly expand recently as the industries such as building materials, coal production capacity, Vertical Mill as a kind of good milling apparatus and It is widely used in the fields such as grinding raw material, cement, coal dust.Vertical Mill have stable mechanism performance, higher abrasive efficiency with And longer service life.In Vertical Mill component, grinding roller is the critical piece for material roll crushing, grinding roller mainly by roller set, Roll centre, mill axis, the compositions such as bearing, and vertical grinding roll cover plays the critical component of grinding work as Vertical Mill, service life not only shadow The height of yield is rung, while the safe operation of roller set is even more to decide the realization of enterprise's productivity effect.

The casting method of the vertical grinding roll cover of traditional conservative is：The stereochemical structure of the casting mold of vertical grinding roll cover as shown in Figure 3 is shown It is intended to, can be seen that from the figure, gets through Feeding channel by using inner wall cut-off, while being aided with chill in its underpart to improve bottom Portion temperature field, it is loose to avoid part caused by between riser using true circle feed-ring.This casting method is needed in casting Lower part puts external chill or interior cold muscle artificially to manufacture end region, takes time and effort, at the same its due to there are steel temperature just, riser it is scattered The influence of thermal effect or the teeming factors such as not in time makes, and it is loose to be likely to occur part under riser, affects the percentage of A-class goods of product.

Invention content

Technical problem to be solved by the invention is to provide a kind of casting technique of the simple vertical grinding roll cover of moulding, the castings Technique is not only not necessarily to put external chill or interior cold muscle, but also also improve product just by optimizing Feeding channel and riser position Product rate.

In order to solve the above technical problems, a kind of efficient casting technique of the simple vertical grinding roll cover of moulding of the present invention, including such as Lower step：

（1）, vertical grinding roll cover casting technique establishment, include design running gate system and riser design, design in vertical grinding roll cover Round riser at the central upper portion position of the body of casting plays the role of Feeding channel, and the riser is higher by the circular cone of the vertical grinding roll cover body of casting Root position and form head；

（2）, according to technological requirement make wooden model, and wooden model is located on template；

（3）, make casting mold；

（4）, mould assembling, drying sand mold；

（5）, melting cast melt；

（6）, casting casting；

（7）Heat preservation is cooling, desanding cools down；

（8）It is heat-treated, cuts riser processing.

Above-mentioned steps（4）The molding sand used is prepared from the following raw materials in parts by weight：100 parts of silica sand, waterglass 10-15 Part, 10-20 parts of water, 0.5-1 parts of phenolic resin, 20-30 parts of bentonite and 5-10 parts of aluminium triphosphate.

Above-mentioned steps（4）The molding sand used is preferably prepared from the following raw materials in parts by weight：

7 parts of 100 parts of silica sand, 12 parts of waterglass, 15 parts of water, 0.8 part of phenolic resin, 25 parts of bentonite and aluminium triphosphate.

Above-mentioned steps（8）In heat treatment process, hardening heat is preferably controlled in 800-900 DEG C, temperature preferably controls At 700-800 DEG C.

Compared with prior art, beneficial effects of the present invention are：

1, mold and moulding are easy, and traditional handicraft needs put external chill in casting lower part or interior cold muscle artificially manufactures end region, And the present invention casting technique because Feeding channel is closer to end region, feeding distance is short, it is possible to not have to chill.Meanwhile always Build height is short, and a section sandbox reduces sandbox and uses number.Present invention saves labor hours, compare traditional handicraft Mold saves materials and the Production Time of half.

2, sand is economized on, sand core sand using amount has saved 2/3rds compared to traditional handicraft.Traditional method riser surrounding needs Larger mold thickness is kept the temperature, and existing way can accomplish that casting surrounding mold thickness is small as far as possible, help to radiate.

3, molten steel has been saved, because riser is more concentrated in middle portion temperature, the product yield of whole circle sand riser exists substantially 50% or so, 5 points of yield rate or so can be improved in casting technique of the invention.

4, increase safety factor, traditional handicraft is there may be steel temperature height, riser heat dissipation effect, teeming not in time etc. because The influence of element makes the possibility for occurring loose under riser, this technique improve the percentage of A-class goods.

Description of the drawings

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Fig. 1 is the dimensional structure diagram for the vertical grinding roll cover that the present invention is cast；

Fig. 2 is the sectional view of Fig. 1；

Fig. 3 is the dimensional structure diagram of the casting mold of vertical grinding roll cover in the prior art；

Fig. 4 is the dimensional structure diagram of the casting mold of vertical grinding roll cover of the present invention；

Fig. 5 is the solidification simulation sectional view of the casting mold of vertical grinding roll cover of the present invention.

Specific implementation mode

The casting method of actual conditions is not specified in the following example, usually according to general international standard, normal condition, Or it carries out according to the normal condition proposed by manufacturer.Unless otherwise defined or described herein, all professions used herein and section It is identical as meaning known to those skilled in the art to learn term.

Embodiment 1

As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4 and Fig. 5, a kind of efficient casting technique of the simple vertical grinding roll cover of moulding, including it is as follows Step：

（1）, vertical grinding roll cover casting technique establishment, include design running gate system and riser design, design in vertical grinding roll cover 3 round riser 2 plays the role of Feeding channel at the central upper portion position of the body of casting 1, and the riser 2 is higher by the vertical grinding roll cover body of casting 1 Circular cone root position and form head；（2）, according to technological requirement make wooden model, and wooden model is located on template；（3）、 Make casting mold；（4）, mould assembling, drying sand mold, the molding sand used is prepared from the following raw materials in parts by weight：100 parts of silica sand, water glass 7 parts of 12 parts of glass, 15 parts of water, 0.8 part of phenolic resin, 25 parts of bentonite and aluminium triphosphate；（5）, melting cast melt；（6）, casting Part is cast；（7）Heat preservation is cooling, desanding cools down：（8）Heat treatment, hardening heat control is in 850 DEG C, temperature control 750 ℃.Sand removal heat treatment cuts riser after coming out of the stove, and along upper cone root medial resection, is tempered destressing.

, unpack rear appearance warm by the vertical grinding roll cover product of above-mentioned cast does not find any naked eyes visual defects, Surface is smooth, no blow-up, without cold shut, volume skin, crackle, burning into sand the defects of, through carrying out flaw detection, cast(ing) surface and internal do not find to surpass Defect and crackle are marked, after heat treatment, the indices such as mechanical property and structure property meet desired effect.

Embodiment 2

Step（4）The molding sand used is prepared from the following raw materials in parts by weight：100 parts of silica sand, 10 parts of waterglass, 10 parts of water, phenol 5 parts of 0.5 part of urea formaldehyde, 20 parts of bentonite and aluminium triphosphate；Remaining is same as embodiment 1.

Embodiment 3

Step（4）The molding sand used is prepared from the following raw materials in parts by weight：

10 parts of 100 parts of silica sand, 15 parts of waterglass, 20 parts of water, 1 part of phenolic resin, 30 parts of bentonite and aluminium triphosphate；Remaining is same In embodiment 1.

Applicant state, person of ordinary skill in the field on the basis of the above embodiments, by above-described embodiment The concrete content point value of component, it is combined with the technical solution of Summary, to the new numberical range generated, and One of the record scope of the present invention, the application are to keep specification concise, no longer enumerate these numberical ranges.

Claims (4)

1. a kind of efficient casting technique of the simple vertical grinding roll cover of moulding, which is characterized in that include the following steps：

（1）, vertical grinding roll cover casting technique establishment, include design running gate system and riser design, design in vertical grinding roll cover The body of casting（1）Central upper portion position at（3）Round riser（2）Play the role of Feeding channel, the riser（2）It is higher by roll mill roller Cover the body of casting（1）Circular cone root position and form head；

（2）, according to technological requirement make wooden model, and wooden model is located on template；

（3）, make casting mold；

（4）, mould assembling, drying sand mold；

（5）, melting cast melt；

（6）, casting casting；

（7）Heat preservation is cooling, desanding cools down：

（8）It is heat-treated, cuts riser processing.

2. a kind of efficient casting technique of the simple vertical grinding roll cover of moulding as described in claim 1, which is characterized in that the step Suddenly（4）The molding sand used is prepared from the following raw materials in parts by weight：

100 parts of silica sand, 10-15 parts of waterglass, 10-20 parts of water, 0.5-1 parts of phenolic resin, 20-30 parts of bentonite and tripolyphosphate 5-10 parts of aluminium.

3. a kind of efficient casting technique of the simple vertical grinding roll cover of moulding as described in claim 1, which is characterized in that the step Suddenly（4）The molding sand used is prepared from the following raw materials in parts by weight：

7 parts of 100 parts of silica sand, 12 parts of waterglass, 15 parts of water, 0.8 part of phenolic resin, 25 parts of bentonite and aluminium triphosphate.

4. a kind of efficient casting technique of the simple vertical grinding roll cover of moulding as described in claim 1, it is characterised in that：The step Suddenly（8）In heat treatment process, hardening heat control is in 800-900 DEG C, temperature at 700-800 DEG C.