CN210547846U

CN210547846U - Pin row casting sand mold for coal mining equipment

Info

Publication number: CN210547846U
Application number: CN201920926732.1U
Authority: CN
Inventors: 安晓文; 李亮
Original assignee: Linzhou Heavy Machinery Casting & Forging Co ltd
Current assignee: Linzhou Heavy Machinery Casting & Forging Co ltd
Priority date: 2019-06-19
Filing date: 2019-06-19
Publication date: 2020-05-19
Anticipated expiration: 2029-06-19

Abstract

The utility model provides a pin row casting sand mould for coal mining equipment, wherein a pin row sand mould comprises a first sand mould and a second sand mould which are arranged left and right and are connected, and an inner cavity of the first sand mould and an inner cavity of the second sand mould form a cavity for pouring the pin row; and the riser is arranged at the upper part of the casting sand mold and is directly communicated with the nitre column part of the pin row cavity. And another pin row sand mold is arranged on the left side or the right side of the single pin row sand mold, and runners of the two pin row sand molds are connected and connected with the same pouring opening. The two pin sand discharge molds are symmetrically arranged. The riser is parallel to the nitre column part of the pin row cavity. The first sand mold and the second sand mold are boxless and frame-free sand molds. The utility model has the advantages that: and (4) horizontally casting, wherein the position of a riser is positioned at a hot point, shrinkage cavities and shrinkage porosity are introduced into the riser, and the interior of the pin row is free of defects. The mould has the advantages of no box shape, flat casting, vertical casting, two boxes in series casting, simple structure and convenient operation.

Description

Pin row casting sand mold for coal mining equipment

Technical Field

The utility model belongs to the casting field, concretely relates to coal mining equipment is with round pin row casting sand mould.

Background

The pin row is needed to be used in the coal mining equipment, the internal defects of the pin row can influence the stress of the pin row, and the pin row in the high-power coal mining equipment is easy to damage. The existing pin row is manufactured by adopting a flat casting process, a mould is divided into an upper mould and a lower mould, and the upper mould and the lower mould are poured downwards, and because the position of a thermal nodule and the inside of the mould have inevitable defects, the mould can only be used on low-power comprehensive coal mining equipment. Moreover, the existing casting process has low efficiency, so that the product competitiveness is low. There is a need for a better quality, substantially defect-free pin row cast suitable for high power coal mining equipment.

SUMMERY OF THE UTILITY MODEL

The utility model provides a coal mining sets up and arranges casting sand mould with round pin.

The purpose of the utility model is realized with the following mode: a pin row casting sand mold for coal mining equipment comprises a first sand mold and a second sand mold which are arranged left and right and connected, wherein an inner cavity of the first sand mold and an inner cavity of the second sand mold form a cavity for casting a pin row; and the riser is arranged at the upper part of the casting sand mold and is directly communicated with the nitre column part of the pin row cavity.

And another pin row sand mold is arranged on the left side or the right side of the single pin row sand mold, and runners of the two pin row sand molds are connected and connected with the same pouring opening.

The two pin sand discharge molds are symmetrically arranged.

The riser is parallel to the nitre column part of the pin row cavity.

The first sand mold and the second sand mold are boxless and frame-free sand molds. The utility model has the advantages that: and (4) horizontally casting, wherein the position of a riser is positioned at a hot point, shrinkage cavities and shrinkage porosity are introduced into the riser, and the interior of the pin row is free of defects. The mould has the advantages of no box shape, flat casting, vertical casting, two boxes in series casting, simple structure and convenient operation.

Drawings

Fig. 1 is a front view of a sand mold before modification.

Fig. 2 is a side view of fig. 1.

Fig. 3 is a top view of fig. 1.

Fig. 4 is a front view of a modified post-cast sand mold.

Fig. 5 is a side view of fig. 4.

Fig. 6 is a top view of fig. 1.

Wherein 1 is a first sand mold, 2 is a second sand mold, 3 is a cavity, 4 is a riser, 5 is a runner, 6 is an upper sand mold, and 7 is a lower sand mold.

Detailed Description

As shown in fig. 1 to 3, the foundry sand molds of the front pin row are modified to be divided into an upper sand mold 6 and a lower sand mold 7. The riser 4 is arranged at the upper part of the upper sand mould 6. The pin row comprises two pin row plates and a plurality of parallel niter columns arranged between the two pin row plates. In the casting sand mould before improvement, the pin columns of the pin row mould cavity 3 are vertical to the risers 4, the risers are not smooth in feeding, and internal defects of products can occur.

As shown in fig. 4-6, the improved pin row casting sand mold for the coal mining equipment comprises a first sand mold 1 and a second sand mold 2 which are arranged left and right and connected, and a cavity 3 for pouring the pin row is formed by an inner cavity of the first sand mold 1 and an inner cavity of the second sand mold 2. And a riser 4 is arranged at the upper part of the casting sand mould, and the riser 4 is directly communicated with the nitre column part of the pin row mould cavity 3. A runner 5 is provided in the first sand mold 1 or the second sand mold 2. And (3) placing a riser 4 at the position of the maximum hot spot, smoothly feeding the riser, completely realizing sequential solidification from bottom to top, introducing shrinkage porosity into the riser 4, and detecting the internal defect of the pin row to be less than phi 2 by ultrasonic flaw detection to obtain the cast pin row with almost no defect inside. The cast steel pin row produced by the process method can be matched with high-power comprehensive coal mining equipment after quenching and tempering treatment, so that the whole equipment is prevented from being broken due to larger defects in the pin row and being stopped due to faults.

Or another pin row sand mold is arranged on the left side or the right side of the single pin row sand mold, and the pouring gates 5 of the two pin row sand molds are connected and connected with the same pouring opening. In this configuration the runner 5 of a single pin row sand mould needs to be open to the edge of the sand mould so that when two pin row sand moulds are brought together the runner 5 is connected. Two pin rows can be obtained by one casting.

The two pin sand discharge molds are symmetrically arranged. A runner 5 may be provided on the second sand mold 2. At this time, the pin row casting sand molds are sequentially a first sand mold 1, a second sand mold 2 and a first sand mold 1 from left to right. The pouring channels 5 on the second sand moulds 2 can be divided into horizontal pouring channels and vertical pouring channels, and the horizontal pouring channels of the two second sand moulds 2 are connected and share one vertical pouring channel connected with a pouring gate. Of course, the runner 5 may be provided in other connection manners.

The risers may be parallel to the nitre section of the pin row cavity 3. The first sand mold 1 and the second sand mold 2 are flaskless and frame-stripping sand molds. The parting plane is the same as before.

When the method is specifically implemented, a set of mould of the boxless frame-removing pin row is manufactured according to the parting line A in a parting manner. And filling sodium silicate sand in the mould, tamping, hardening by CO2, and taking out the mould to obtain the first sand mould 1 without the box stripping frame and the second sand mould 2 without the box stripping frame. And (3) vertically combining the first sand mold 1 and the second sand mold 2 on a flat sand bed. And another set of first sand mold 1 and second sand mold 2 are erected tightly and combined beside the first set of pin row sand mold, the two sets of pin row sand molds are connected in series, and the pin row cavity 3, the riser 4 and the pouring gate 5 are kept connected smoothly. And (5) enclosing sand, pressing a weight and waiting for pouring.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

Claims

1. The utility model provides a round pin row casting sand mould for coal mining equipment which characterized in that: the pin row sand mold comprises a first sand mold and a second sand mold which are arranged left and right and connected, and an inner cavity of the first sand mold and an inner cavity of the second sand mold form a cavity for pouring the pin row; and the riser is arranged at the upper part of the casting sand mold and is directly communicated with the nitre column part of the pin row cavity.

2. The pin row casting sand mold for the coal mining equipment according to claim 1, characterized in that: and another pin row sand mold is arranged on the left side or the right side of the single pin row sand mold, and runners of the two pin row sand molds are connected and connected with the same pouring opening.

3. The pin row casting sand mold for the coal mining equipment according to claim 2, characterized in that: the two pin sand discharge molds are symmetrically arranged.

4. The pin row casting sand mold for the coal mining equipment according to any one of claims 1 to 3, characterized in that: the riser is parallel to the nitre column part of the pin row cavity.

5. The pin row casting sand mold for the coal mining equipment according to any one of claims 1 to 3, characterized in that: the first sand mold and the second sand mold are flaskless and frame-stripping sand molds.