Casting mold for casting hinged body for hinged dump truck

Abstract

The utility model provides a casting mould for casting a hinged body for a hinged dumper, which comprises a mould, a direct pouring gate is arranged at the top of the mould, a direct pouring positioning plate is arranged on the outer side of the direct pouring gate, a riser positioning plate is arranged on the inner side of the direct pouring gate, and a first insulated riser and a second insulated riser are respectively arranged at a middle through hole of the mould. A third insulated feeder and a fourth insulated feeder are respectively arranged at through holes in the two sides of the die, and internal chillers are arranged above the third insulated feeder and the fourth insulated feeder. According to the sand core, the sand core is made of the alkali phenolic sand, the phenomenon of hot cracks generated during solidification and shrinkage of molten liquid is effectively reduced by utilizing the good deformability of the alkali phenolic sand and the excellent surface quality of furan resin sand, and meanwhile, the zircon powder coating is brushed on the surface to ensure the size of a casting and the smooth surface quality of the casting, so that the yield of the casting is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to articulated dump truck technical field, concretely is a kind of for the casting mould of articulated body for casting articulated dump truck. BACKGROUND

[0002] Articulated dump truck has superiority in flexibility and cross-country ability than rigid car, and has stronger traction ability than rigid car on poor road, and is suitable for driving condition of poor road and no road. Therefore, in initial construction construction site, articulated car can play greater superiority and be widely applied in the condition of no road. Articulated body of articulated dump truck is the intermediate connecting part of front car body and rear car body, to ensure the service life and reliability of vehicle, it is determined that articulated body has high quality requirement, so it requires no crack in articulated body, the internal structure of articulated body is dense to meet the grade requirement of ultrasonic flaw detection, and chemical composition and mechanical property are qualified.

[0003] At present, articulated frame is cast by ZG28NiMoA material, and articulated body has the characteristics of complex shape and large wall thickness difference. When casting this kind of casting with high dimensional accuracy requirement such as articulated body, if the outer shape and sand core are made of furan resin sand, although furan resin sand can obtain higher dimensional accuracy grade, but due to the poor yield of furan resin sand, hot cracks are easily generated during solidification and shrinkage of molten steel due to uneven wall thickness of casting, so that the qualified rate of casting is not high. At the same time, the stress of articulated body is complex in use, so the articulated body as a whole needs to have good compactness and meet the grade requirement of ultrasonic flaw detection, but using conventional casting method, articulated frame will appear shrinkage, porosity and sand inclusion defects and be exposed after machining, so that the qualified rate of articulated body is not high, resulting in the increase of manufacturing cost. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of casting mould for casting articulated body for articulated dump truck to solve the problems raised in the above background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A kind of casting mould for casting articulated body for articulated dump truck, comprising:

[0007] The mould is provided with a straight sprue at the top, a straight sprue positioning plate is arranged outside the straight sprue, and a riser positioning plate is arranged inside the straight sprue, a first heat preservation riser and a second heat preservation riser are arranged at the middle through hole of the mould respectively, a third heat preservation riser and a fourth heat preservation riser are arranged at the through hole of the two sides of the mould respectively, and the third heat preservation riser and the fourth heat preservation riser are provided with inner chill above.

[0008] Preferably, the flange face bottom of the mold is provided with an outer chill, and the position of the outer chill vertically corresponds to the positions of the first and second insulating risers.

[0009] Preferably, the third and fourth insulating risers are provided with an inner chill above.

[0010] Preferably, the inner side surfaces of the upper and lower molds of the mold sand type are brushed with zirconite powder coating.

[0011] Preferably, the sand core of the mold is made of alkali phenolic sand.

[0012] Preferably, the sprue and the runner form the gating system of the mold.

[0013] Preferably, the bottom of the mold is provided with a slag discharge port.

[0014] Compared with the prior art, the mold has the beneficial effects that:

[0015] The mold is made of alkali phenolic sand, and the good yield of alkali phenolic resin sand and the excellent surface quality of furan resin sand effectively reduce the thermal cracking phenomenon caused by the solidification shrinkage of the molten liquid, and the surface brushed with zirconite powder coating ensures the size of the casting and the surface quality of the smooth casting, thereby improving the yield of the casting.

[0016] The mold is improved by improving the casting process, and the positions of the insulating riser, the riser patch and the outer chill are reasonably set to cooperate with each other, so that the surface quality of the formed casting is excellent, the internal organization of the casting is dense, the defects such as sand inclusion and porosity in the casting are few, and the casting meets the ultrasonic flaw detection requirement, thereby effectively improving the yield of the casting and reducing the manufacturing cost. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is a front view of the mold;

[0018] Fig. 2 It is a side sectional view of the mold;

[0019] Fig. 3 It is a side view of the mold;

[0020] Fig. 4 It is a top view of the mold.

[0021] In the figure: 1-mold; 2-sprue; 3-first insulating riser; 4-second insulating riser; 5-third insulating riser; 6-fourth insulating riser; 7-outer chill; 8-sprue positioning plate; 9-riser positioning plate; 10-inner chill; 11-runner; 12-slag discharge port. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0023] Embodiment:

[0024] Please refer to Figs. 1 to 4 The present application provides a technical scheme:

[0025] A casting mold for casting a hinged body of a hinged self-unloading vehicle, comprising:

[0026] The mold 1 is provided with a straight sprue 2 at the top, a straight sprue positioning plate 8 outside the straight sprue 2, and a riser positioning plate 9 inside the straight sprue 2. First and second heat preservation risers 3 and 4 are respectively arranged at the middle through hole of the mold 1. Third and fourth heat preservation risers 5 and 6 are respectively arranged at the through holes on both sides of the mold 1. The third and fourth heat preservation risers 5 and 6 are provided with an inner chill 10 above them.

[0027] In this embodiment, an outer chill 7 is placed at the bottom of the flange surface. The outer chill 7 corresponds to the first and second heat preservation risers 3 and 4 at the top of the cylinder and the middle through hole. The outer chill 7 can accelerate the solidification speed of the key parts of the casting. Due to its good thermal conductivity, the outer chill 7 can quickly absorb the heat of the local area of the casting, so that the area cools and solidifies quickly. The heat preservation riser can make the gas and inclusions in the metal liquid float to the surface and be discharged through the heat preservation riser, thereby purifying the metal liquid and improving the quality of the casting. The outer chill 7 and the heat preservation riser provide necessary feeding space and exhaust and deslagging channels, and can effectively ensure the compactness of the whole casting and the exhaust and deslagging efficiency.

[0028] Specifically, the flange surface of the mold 1 is provided with an outer chill 7, and the position of the outer chill 7 is vertically corresponding to the positions of the first and second heat preservation risers 3 and 4.

[0029] Specifically, the third and fourth heat preservation risers 5 and 6 are provided with an inner chill 10 above them.

[0030] In this embodiment, the metal liquid is injected from the straight sprue 2 and enters the mold 1 through the cross runner 11 to form the shape inside the mold 1, which can ensure the smooth filling of the metal liquid. By controlling the flow path and speed of the metal liquid, the sequential solidification from the part far away from the riser or sprue to the riser or sprue is realized. This sequential solidification mode is helpful for the casting to realize good feeding during the solidification process, that is, the metal liquid needed when the casting shrinks is supplemented through the riser or sprue, thereby reducing the generation of shrinkage holes and shrinkage porosity.

[0031] Specifically, the sprue 2 and the runner 11 constitute a gating system of the mold 1.

[0032] Specifically, the bottom of the mold 1 is provided with a slagging-off port 12.

[0033] Embodiment 2:

[0034] The mold 1 is provided with a sprue 2 at the top, a sprue positioning plate 8 outside the sprue 2, a riser positioning plate 9 inside the sprue 2, a first heat-insulating riser 3 and a second heat-insulating riser 4 at the middle through hole of the mold 1, a third heat-insulating riser 5 and a fourth heat-insulating riser 6 at the through holes at the two sides of the mold 1, and an inner chill 10 above the third heat-insulating riser 5 and the fourth heat-insulating riser 6.

[0035] In this embodiment, furan resin is used as the binder, and a catalyst is added to mix the sand mold, which is self-cured at room temperature. The furan resin sand has good fluidity, which makes the sand easily fill the corners of the mold 1, reduces the generation of air bubbles, and has high strength due to the binding effect of the furan resin, which can resist the impact and pressure of the metal liquid, is easy to compact, has high strength of the mold, and can self-collapse after casting, which is convenient for cleaning and recycling.

[0036] Specifically, the inner side surface of the upper mold and the lower mold of the mold 1 sand mold is provided with a brushing layer.

[0037] Specifically, the brushing layer is zirconium powder paint.

[0038] In this embodiment, the sand core is made of alkali phenolic sand. The alkali phenolic resin sand has good plasticity at high temperature, can deform to a certain extent during the solidification process of the casting, thereby reducing the stress generated by the shrinkage of the metal liquid, and the furan resin sand has good surface finish, effectively reduces the thermal cracking phenomenon generated when the molten liquid solidifies and shrinks, and the surface brushing of zirconium powder paint ensures the size of the casting and the quality of the smooth casting surface, which can effectively improve the yield of the casting.

[0039] Specifically, the sand core of the mold 1 is made of alkali phenolic sand.

[0040] In use, the sand mold is filled into the mold 1, the sprue 2 and the heat-insulating riser are made on the mold 1, the sand mold surface of the upper mold and the lower mold is brushed with zirconium powder paint, the metal liquid is injected from the sprue 2 after preheating the sand mold, the outer chill 7 and the inner chill 10 absorb heat, and the casting is cooled and solidified, and then taken out for subsequent processing.

[0041] The rest of the parts not described can be the same as the prior art, or be the known technology or be realized by using the prior art, and will not be described in detail here.

[0042] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A casting mold for casting a hinge body for a hinge articulated dump truck, characterized by, The utility model relates to a straight pouring gate and horizontal gate constitute the pouring system of mould (1). The utility model relates to a straight pouring gate and horizontal gate constitute the pouring system of mould (1).

2. A casting mold for casting a hinge body for a hinged dump truck according to claim 1, characterized in that: The utility model relates to a straight pouring gate and horizontal gate constitute the pouring system of mould (1).

3. A casting mold for casting a hinge body for a hinged dump truck according to claim 1, characterized in that: The utility model relates to a straight pouring gate and horizontal gate constitute the pouring system of mould (1).

4. A casting mold for casting a hinge body for a hinged dump truck according to claim 1, characterized in that: The utility model relates to a straight pouring gate and horizontal gate constitute the pouring system of mould (1).

5. A casting mold for casting a hinge body for a hinged dump truck according to claim 1, characterized in that: The utility model relates to a straight pouring gate and horizontal gate constitute the pouring system of mould (1).

6. A casting mold for casting an articulating body for an articulating dump truck according to claim 1, characterized in that: ​

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