A guide ring casting CNC machining mold and manufacturing method thereof

Abstract

A CNC machining mold for a guide ring casting and a manufacturing method thereof, wherein the mold is divided into two parts, namely, a guide ring casting mold and a guide ring casting core box mold; the outer cylindrical surface of the cylindrical base of the wood frame of the guide ring casting mold is composed of a plurality of evenly arranged rectangular plates A, with gaps between adjacent rectangular plates A; the inner cylindrical surface of the wood frame of the guide ring casting mold is composed of a plurality of evenly arranged rectangular plates B, with gaps between adjacent rectangular plates B; the other parts of the wood frame of the guide ring casting mold are composed of a plurality of molded wooden boards or blocks spliced ​​together, and an outer skin covering layer is pasted and covered on the wood frame. The present invention improves the adaptability of the mold covering material to changes in the production environment by improving the composite structure of the guide ring casting mold and the formula of the mold covering layer material, and can cooperate with CNC machine tools to perform fine finishing processing on the mold product, thereby improving the processing accuracy, quality and output of the guide ring casting mold.

Description

Technical Field

[0001] The invention relates to the production field of casting molds, and in particular to a guide ring casting numerical control machining mold and a manufacturing method thereof. Background Art

[0002] With the continuous increase in the production scale and output of casting mold enterprises, as well as the continuous improvement and innovation of production technology, the problems of high turnover rate of skilled workers and lack of reserve force in casting mold enterprises are becoming increasingly prominent. Among them, how casting mold enterprises can reduce costs, improve productivity and improve product quality has become the focus of attention.

[0003] The traditional casting mold method is that technicians manually draw, cut and assemble the mold, which results in low production efficiency, long production cycle, low product precision (dimensional error value is ±2-3mm), rough product surface that cannot be coated, and high labor costs.

[0004] With the continuous improvement and innovation of casting mold production technology, CNC machining technology has been tried and applied in the production field of casting molds to achieve the goal of high production, increased efficiency and improved quality of CNC machining casting molds.

[0005] Traditional plastic covering materials have poor product strength, wear resistance, adhesion, surface gloss and deformation resistance. They are only suitable for manual craft operations and are difficult to apply to CNC machine processing, especially for large arc surfaces. Due to the insufficient local strength of the mold, it is difficult to ensure the surface gloss of the product after CNC processing, which affects the product quality. Summary of the invention

[0006] The purpose of the present invention is to provide a CNC machining mold for a guide ring casting and a manufacturing method thereof. By improving the composite structure of the guide ring casting mold and improving the formula of the mold covering material, the adaptability of the mold covering material to changes in the production environment is effectively improved, the adhesion of the mold covering material to the wood frame is enhanced, the uniformity of the coating, the product forming degree and the overall strength of the mold are improved, and it can cooperate well with the CNC machine tool to perform fine processing on the mold product, thereby improving the processing accuracy, quality and output of the guide ring casting mold.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A CNC machining mold for a guide ring casting, the mold is divided into two parts, namely a guide ring casting mold and a guide ring casting core box mold; the guide ring casting mold comprises a wood frame and an outer skin covering layer, the outer cylindrical surface of the cylindrical base of the wood frame of the guide ring casting mold is composed of a plurality of evenly arranged rectangular plates A, with gaps between adjacent rectangular plates A; the inner cylindrical surface of the wood frame of the guide ring casting mold is composed of a plurality of evenly arranged rectangular plates B, with gaps between adjacent rectangular plates B; other parts of the wood frame of the guide ring casting mold are composed of a plurality of molded wooden boards or wooden blocks spliced ​​together, and the outer skin covering layer is pasted and covered on the wood frame.

[0009] The core box mold for the guide ring casting includes a wood frame and an outer skin covering layer. The wood frame of the core box mold for the guide ring casting includes two layers of horizontal support plates, a bottom plate, and a vertical support plate. The two layers of horizontal support and the horizontal support plates and the bottom plate are supported and fixed by vertical support plates. Between the circular inner openings of the two layers of horizontal support plates, a plurality of rectangular plates are arranged horizontally and evenly in layers to form an upper inner cylindrical surface, and gaps are left between adjacent rectangular plates; between the circular inner openings of the middle layer of horizontal support plates and the bottom plate, a plurality of rectangular plates C are evenly arranged to form a lower inner cylindrical surface, and gaps are left between adjacent rectangular plates C; the outer skin covering layer is pasted, covered, and filled on the wood frame.

[0010] The transverse supporting plate and the bottom plate are formed by splicing a plurality of shaped wooden boards.

[0011] The outer covering layer comprises the following raw materials in parts by weight: 30-40 parts of industrial brine, 10-18 parts of magnesium oxide, and 55-60 parts of sawdust.

[0012] The suitable temperature for producing the outer skin covering layer is 0°C-40°C.

[0013] When the production temperature is between 0°C and 15°C, the outer covering layer comprises the following raw materials in parts by weight: 30-40 parts of industrial brine, 15≤magnesium oxide≤18 parts, and 55≤sawdust≤57 parts.

[0014] When the production temperature is 15°C<≤40°C, the outer covering layer comprises the following raw materials in parts by weight: 30-40 parts of industrial brine, 10≤magnesium oxide<15 parts, and 57<sawdust≤60 parts.

[0015] A method for manufacturing a guide ring casting CNC machining mold comprises the following steps:

[0016] 1) Make a wood frame according to the workpiece to be processed;

[0017] 2) The raw materials of the outer covering layer are mixed evenly according to the above weight proportions, and then the wood frame is covered and molded, compacted, dried and solidified to obtain a primary processing mold;

[0018] 3) Perform CNC programming and tool path positioning according to product size and precision requirements, and perform finishing shaping on a CNC machine tool for the primary processing mold obtained in step 2);

[0019] 4) Mix the putty and succinic acid evenly, and then apply it evenly and flatly on the mold after finishing and shaping. After manual polishing, spray nitrocellulose varnish.

[0020] In the above step 2), for the part of the product with a fillet of more than 15°, fossil powder is added in proportion to the raw material formula in combination with the above temperature, and the addition ratio is outer skin covering layer raw material: talcum powder = 4-5:1.

[0021] In the above step 4), the mixing ratio of putty and thinner is putty: thinner=95-99:1.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention provides a guide ring casting CNC machining mold and a manufacturing method thereof. By improving the composite structure of the guide ring casting mold and improving the formula of the mold covering layer material, the adaptability of the mold covering material to changes in the production environment is effectively improved, the adhesion and bonding of the mold covering material to the wood frame are enhanced, the uniformity of the coating, the product forming degree and the overall strength of the mold are improved, and the mold product can be well matched with the CNC machine tool for fine finishing processing, thereby improving the processing accuracy, quality and output of the guide ring casting mold.

[0024] The present invention adopts the splicing of small wooden strips with gaps at the large-angle circular surface of the wood frame of the guide ring casting mold, and is used in conjunction with the newly developed covering material of the present invention, so as to effectively enhance the adhesion of the external covering material to the wood frame. After drying and solidification, the adhesion, product forming degree and strength are very high. The structure of the coated area is fine and dense, and the uniformity is good. It is suitable for CNC machine tools to carry out fine processing and finishing of the product. In particular, after CNC processing of the rounded corners of the product, the surface of the product is smooth and delicate, which is conducive to cultivating sand molds and improving the surface quality of castings.

[0025] The guide ring casting mold of the present invention is finely processed by a CNC machine tool to improve the product processing accuracy (the dimensional error value is ±0.5mm); increase the glossiness and fineness of the mold surface, which is beneficial to surface coating treatment; effectively improve production efficiency and save labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a picture of the wood frame of the guide ring casting mold before the outer skin is shaped;

[0027] Figure 2 This is a molding mold diagram of the guide ring casting mold after being molded by the outer skin covering layer;

[0028] Figure 3 This is a picture of the wood frame of the core box mold of the guide ring casting before the outer skin is molded;

[0029] Figure 4 It is a molding mold diagram of the core box mold of the guide ring casting after being molded by the outer skin covering layer.

[0030] In the figure: 1-outer cylindrical surface, 1-1 rectangular plate A, 2-cross runner installation position, 3-inner cylindrical surface, 3-1 rectangular plate B, 4-sprue boss installation position, 5-upper horizontal support plate, 6-middle horizontal support plate, 7-bottom plate, 8-upper inner cylindrical surface, 8-1 rectangular plate, 9-lower inner cylindrical surface, 9-1 rectangular plate C, 10-gap, 11-vertical support plate. DETAILED DESCRIPTION

[0031] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0032] See Figure 1-Figure 4 , a CNC machining mold for a guide ring casting, the mold is divided into two parts: a guide ring casting mold and a guide ring casting core box mold; Figure 1 , Figure 2 As shown, the guide ring casting mold includes a timber frame and an outer skin covering layer. The outer cylindrical surface 1 of the cylindrical base of the timber frame of the guide ring casting mold is composed of a plurality of evenly arranged rectangular plates A1-1, and a gap 10 is left between adjacent rectangular plates A1-1; the inner cylindrical surface 3 of the timber frame of the guide ring casting mold is composed of a plurality of evenly arranged rectangular plates B3-1, and a gap 10 is left between adjacent rectangular plates B3-1; the other parts of the timber frame of the guide ring casting mold are composed of a plurality of molded wooden boards or wooden blocks spliced ​​together, and the outer skin covering layer is pasted and covered on the timber frame.

[0033] like Figure 2 , Figure 3 As shown, the guide ring casting core box mold includes a timber frame and an outer skin covering layer. The timber frame of the guide ring casting core box mold includes two layers of transverse support plates (an upper transverse support plate 5 and a middle transverse support plate 6), a bottom plate 7, and a vertical support plate 11. The two layers of transverse support plates and the transverse support plates and the bottom plate are supported and fixed by the vertical support plates 11. Between the circular inner openings of the two layers of transverse supports, a plurality of rectangular plates 8-1 are arranged horizontally and evenly in layers to form an upper inner cylindrical surface 8, and gaps 10 are left between adjacent rectangular plates 8-1; between the circular inner opening of the middle layer of transverse support plate 6 and the bottom plate 7, a plurality of rectangular plates C9-1 are evenly arranged to form a lower inner cylindrical surface 9, and gaps 10 are left between adjacent rectangular plates C9-1; the outer skin covering layer is pasted, covered and filled on the timber frame.

[0034] The transverse support plates (upper transverse support plates 5, middle transverse support plates 6) and the bottom plate 7 are formed by splicing a number of shaped wooden boards.

[0035] The outer covering layer comprises the following raw materials in parts by weight: 30-40 parts of industrial brine, 10-18 parts of magnesium oxide, and 55-60 parts of sawdust.

[0036] The suitable temperature for producing the outer skin covering layer is 0°C-40°C.

[0037] When the production temperature is between 0°C and 15°C, the outer covering layer comprises the following raw materials in parts by weight: 30-40 parts of industrial brine, 15≤magnesium oxide≤18 parts, and 55≤sawdust≤57 parts.

[0038] When the production temperature is 15°C<≤40°C, the outer covering layer comprises the following raw materials in parts by weight: 30-40 parts of industrial brine, 10≤magnesium oxide<15 parts, and 57<sawdust≤60 parts.

[0039] Embodiment 1:

[0040] When the production temperature is between 0°C and 15°C, the outer covering layer includes the following raw materials in parts by weight: 30 parts, 15 parts, and 55 parts of industrial brine.

[0041] A method for manufacturing a guide ring casting CNC machining mold comprises the following steps:

[0042] 1) Make a wood frame according to the workpiece to be processed;

[0043] 2) mixing the outer skin covering raw materials evenly according to the above weight proportions, and then covering and shaping the wood frame, compacting, drying and solidifying, to obtain a primary processing mold;

[0044] For the part of the product with a fillet of more than 15°, combined with the above temperature, fossil powder is added to the outer skin covering raw material formula in proportion, the adding ratio is outer skin covering material: talcum powder = 4:1, and the amount of talcum powder added is 25 parts;

[0045] 3) Perform CNC programming and tool path positioning according to product size and precision requirements, and perform finishing shaping on a CNC machine tool for the primary processing mold obtained in step 2);

[0046] 4) Mix the putty and succinic acid evenly, and then apply it evenly and flatly on the mold after finishing and shaping. After manual polishing, it looks smooth and round, and then spray nitro varnish.

[0047] In the above step 4), the mixing ratio of atomic putty and thinner is atomic putty: thinner=99:1.

[0048] Embodiment 2:

[0049] When the production temperature is 5°C<≤40°C, the outer covering layer includes the following raw materials in parts by weight: 30 parts, 10 parts, and 60 parts of industrial brine.

[0050] A method for manufacturing a guide ring casting CNC machining mold comprises the following steps:

[0051] 1) Make a wood frame according to the workpiece to be processed;

[0052] 2) mixing the outer skin covering raw materials evenly according to the above weight proportions, and then covering and shaping the wood frame, compacting, drying and solidifying, to obtain a primary processing mold;

[0053] For the part of the product with a fillet of more than 15°, combined with the above temperature, fossil powder is added to the outer skin covering raw material formula in proportion, the adding ratio is outer skin covering material: talcum powder = 5:1, and the amount of talcum powder added is 20 parts;

[0054] 3) Perform CNC programming and tool path positioning according to product size and precision requirements, and perform finishing shaping on a CNC machine tool for the primary processing mold obtained in step 2);

[0055] 4) Mix the putty and succinic acid evenly, and then apply it evenly and flatly on the mold after finishing and shaping. After manual polishing, it looks smooth and round, and then spray nitro varnish.

[0056] In the above step 4), the mixing ratio of putty and thinner is putty: thinner=98:1.

[0057] The timber frame of the present invention can also be processed by numerical control and can be assembled after being disassembled and processed.

[0058] The outer skin covering layer of the present invention is used for finishing and shaping of the wood frame, and the raw material formula is blended according to the production temperature to form a mixed material for covering. When the product has a rounded corner of more than 15° and the product formula ratio is combined with the above temperature, talcum powder needs to be added.

[0059] CNC programming and tool path positioning are carried out according to the qualified product size and delivery requirements, and the mold products are automatically processed according to the prepared processing procedures.

[0060] Then use putty, thinner and nitro lacquer to finish the product's appearance.

[0061] The products meet the factory qualified product standards in terms of appearance, quality and production process, and are carefully packed and packaged, waiting for the products to be shipped out of the factory.

Claims

1. A CNC machining mold for a guide ring casting, wherein the machining mold is divided into two parts: a guide ring casting mold and a guide ring casting core box mold; characterized in that: The guide ring casting mold comprises a wood frame and an outer skin covering layer. The outer cylindrical surface of the cylindrical base of the wood frame of the guide ring casting mold is composed of a plurality of evenly arranged rectangular plates A, with gaps between adjacent rectangular plates A; the inner cylindrical surface of the wood frame of the guide ring casting mold is composed of a plurality of evenly arranged rectangular plates B, with gaps between adjacent rectangular plates B; the outer skin covering layer is pasted and covered on the wood frame; The core box mold of the guide ring casting includes a wood frame and an outer skin covering layer. The wood frame of the core box mold of the guide ring casting includes two layers of horizontal support plates, a bottom plate, and a vertical support plate. The two layers of horizontal support and the horizontal support plates and the bottom plate are supported and fixed by the vertical support plates. Between the circular inner openings of the two layers of horizontal support plates, a plurality of rectangular plates are arranged horizontally and evenly in layers to form an upper inner cylindrical surface, and gaps are left between adjacent rectangular plates; between the circular inner openings of the middle layer of horizontal support plates and the bottom plate, a plurality of rectangular plates C are evenly arranged to form a lower inner cylindrical surface, and gaps are left between adjacent rectangular plates C; the outer skin covering layer is pasted and covered on the wood frame; The suitable temperature for producing the outer covering layer is 0°C-40°C; When the production temperature is 0°C-15°C, the outer covering layer comprises the following raw materials in parts by weight: 30-40 parts of industrial brine, 15≤magnesium oxide≤18 parts, 55≤sawdust≤57 parts; When the production temperature is 15°C<≤40°C, the outer covering layer comprises the following raw materials in parts by weight: 30-40 parts of industrial brine, 10≤magnesium oxide<15 parts, and 57<sawdust≤60 parts.

2. The CNC machining mold for guide ring casting according to claim 1, characterized in that: The transverse supporting plate and the bottom plate are formed by splicing a plurality of shaped wooden boards.

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