KR20070104965A - A model jig of camshaft mold and process for inserting chiller using thereof - Google Patents

Abstract

A model jig of a camshaft mold and a chiller insertion method using the same are provided to insert a chiller and a filter into the mold quickly by disposing plural chillers and a filter in the model jig in advance and then inserting the chillers and the filter into the main mold at a time. A model jig is installed at an inverting member rotating at 180 degrees around an inverting shaft and fitted with a filter and plural chillers in advance to insert the chillers and the filter into a mold at the same time with reversely turning the chillers and the filter. A model jig plate(100) of predetermined thickness comprises a filter mounting hole(140) formed in the center of one side; a pair of chiller insertion plate mounting units(110) bored through the inside in a longitudinal direction; and plural mounting and fixing holes(130) fixed to the inverting member. Plural chiller insertion plates(120) are fixed on each proper position of the chiller insertion plate mounting units of the model jig plate.

Description

Model Jig of Camshaft Mold and Process for Inserting chiller using equivalent

1 is a plan view showing the configuration of a model jig which is an embodiment of the present invention.

Figure 2 is a front cross-sectional view of Figure 1 and the insertion state for each angle of the cold insert inserted into the cold insert insert of the present invention.

Figure 3 is an exploded perspective view of the cold inserts embodiment of the present invention.

Figure 4 is a perspective view of the use state equipped with the present invention jig model inverting device.

Figure 5 is a side cross-sectional view showing a cold metal insertion process by the present invention model jig,

a) shows a number of cold metals and filters inserted into the model jig.

b) is the state where the bottom mold is placed on the model jig into which the cold metal and the filter are inserted.

c) shows the model jig and the lower mold reversed by 180 degrees.

d) is the model jig removed from the lower mold.

e) is the upper mold on the lower mold

Figure 6 is a flow chart of the operation of the mold operation by manual molding during the conventional mold manufacturing

* Explanation of symbols for the main parts of the drawings

100: model jig plate 110: cold metal insert mounting portion

111: stepped portion 112: assembly screw hole

120: cold insert insertion table 121: bonding piece

122: screw hole 123: cold lock groove

124: support plate 130: mounting fixing hole

140: filter installation port 200: inverting device

210: inversion member 220: inversion shaft

230: holding means 300: mold

301: lower mold 302: upper mold

310: chiller 320: filter

The present invention in the mold manufacturing system for the production of the camshaft for the engine to quickly and accurately insert the cold metal and the filter inserted into the mold to prevent the defect of the mold and to enable the automated operation of the mold manufacturing system It relates to a model jig of a camshaft mold and a cold metal insertion method using the same.

An engine camshaft is an important component installed in an engine generating power of a vehicle, and performs a very important function in the operation of the engine.

In other words, the camshaft is one of the core parts of the engine that requires precision and durability as it is a very important part for operating the intake and exhaust valve devices in the engine cylinder by receiving the rotational motion from the crankshaft rotating.

Such camshafts are usually manufactured by forging or casting, but in the manufacture of a camshaft by the casting method, it is essential to manufacture a mold for casting.

The mold for casting such a cam shaft is usually manufactured by using a phenol resin coating sand made to coat the phenol resin to the sand particles so that the sand particles have an adhesive force and can be molded into a specific shape.

Looking at the work process for producing the mold of the cam shaft by the casting method as described above step by step.

The main process in the mold fabrication process is a molding process for molding the upper and lower molds of the mold; The mold may be divided into a molding process in which a mold is applied to the inside of the upper mold and the lower mold formed by the molding process, the cold metal and the filter are correctly inserted, and then the upper mold and the lower mold are combined.

The molding process for forming the mold is performed in a mold molding machine.

The mold molding machine includes a preheating furnace, a sand dumping part, a heating furnace, and a mold extracting part, and the work is continuously performed while being circulated continuously.

In the preheating furnace, the preheating work is first performed by heating the mold having the camshaft shape assembled on the bogie to 300 ± 50 ℃.

The mold preheated in the preheating furnace moves to the sand dumping portion, and pours the thermosetting phenolic resin coated sand onto the heated mold.

That is, in the sand dumping part, the coating sand is applied to the surface of the preheated mold so that the phenol resin coated on the outer surface of the sand is adhesive by heat of the preheated mold, thereby forming a mold on the outer surface of the mold. To do that.

The mold is formed to have a predetermined thickness so that the coating sand not formed by the mold is recovered and reused.

After recovering the coating sand, the mold is moved to a heating furnace and cured by heating to 300 ° C.

That is, the heating furnace heats and bakes the outer shape of the mold formed by coating the mold.

The mold, which is fired and molded in the heating furnace, moves to the mold extraction unit and is separated from the mold while being extracted from the mold while the lower plate of the mold extraction unit is raised.

Through this operation, the mold is molded and extracted so that the upper plate and the lower plate are paired, respectively, and the molding process of the mold is completed.

When the molding process operation by the mold molding machine is completed, it leads to the molding process of the extracted upper template and the lower template.

In the molding process, the upper mold and the lower mold are formed in a pair so that the cold mold and the filter are precisely set at the corresponding positions in the extracted mold, and then the bond is injected, and the upper and lower molds respectively manufactured. Is molded by joining.

After the bonding is completed, the inlet trimming should be done to remove and clean foreign substances in the molten metal inlet area.

The phenol resin coated sand mold thus manufactured is cooled by putting molten metal into the mold made by the foundry sand, and finally, the foundry sand attached to the surface is removed to complete the casting operation, and then processed again to final camshaft. To prepare.

However, in the related art, a work of inserting a plurality of cold metals and filters into the mold before the molding operation to complete the mold is necessarily accompanied, and most of these operations have been performed by a direct human worker.

Accompanying drawings FIG. 6 is a flow chart of a combination work operation by hand during the manufacture of a conventional mold, which shows that the work is performed sequentially and continuously by the personnel of three persons.

In other words, the mold separation, mold cleaning, drawing application, and chiller alignment are sequentially and repeatedly performed from the molding machine by the hands of the worker 2, the main worker, and the mold is separated from the assistants 1 and 3, respectively. Tell what you did.

Workers 1 and 3 are alternately placed in the mold received from the main worker, drawing the lower plate, installing the lower plate, inserting the chiller in the corresponding area of the lower plate, inserting the filter, cleaning the lower plate, and bonding to the bond injection line. In order to perform the work in the order of injection, top plate combination, switch operation of the molding machine, chiller preparation, and mold loading.

The molding work must be completed by a group of three workers within a predetermined time, and then proceeded to the next work process.If one work process is neglected, it will lead to the failure of the camshaft due to the bad mold. It costs.

Conventional molding work has been made by the hand of the operator as described above, there were a variety of problems.

In other words, there is a risk that the mold plate in the less hardened state will be deformed during the extraction process, and the worker will spray the air spray gun by hand to apply the figure during the application of the figure. The difference causes uneven coating concentration.

In addition, as a continuous operation, the cold metal and the filter must be manually inserted on the lower plate by hand, and thus the accuracy of the work is reduced because it is a manual operation, and the product is damaged due to the scratching of the mold or the sand is released, leading to product defects. When the mold is molded by cooling, the mold deforms or the plastic deformation of the mold causes the adhesive force to deteriorate due to poor adhesion.

In addition, by using the grinding wheel artificially trimming the inlet and removing the foreign matter by using the shaping, even work is not uniform, there is a fear that foreign matter flowed into the mold to cause product defects.

In particular, the odor generated during the finishing operation of the inlet by heating and manual work of phenolic resin and the spread of dust in the working process have been pointed out as a problem to the worker's health.

In order to improve such a problem, the applicant has proposed Patent Application No. 2005-116287, "Automation system and process for manufacturing a camshaft mold," and the present invention provides the operator with the conventional technology to manually cool the inside of the mold. It is intended to improve the efficiency of work by allowing quick and accurate automation of what was manually performed by inserting filters and filters.

Insertion of a plurality of cold metals inserted into the mold must be accurately inserted at different angles for each insertion position, and in order to produce a good cam shaft, a very accurate insertion of the chiller inserted into the mold is required.

In particular, since the operation is performed on the mold processed in a state heated to a high temperature, since the mold is not completely solidified, that is, it is easily deformed, a very rapid and precise work is required before the deformation.

An object of the present invention is to more quickly and accurately by preliminarily inserting a plurality of cold metals and filters inserted into a mold processed by a camshaft mold making automation system into a separate model jig and then inserting them into the mold temporarily. An object of the present invention is to provide a model jig of a camshaft mold for inserting a cold metal filter and a cold metal insertion method using the same.

In order to achieve the above object, in the present invention, it is mounted to the inversion member rotated 180 degrees around the inversion axis of the inverter to pre-insert the filter and a plurality of cold metal, and then to be inserted into the molded mold at the same time, A model jig plate having a predetermined thickness formed with a filter mounting hole formed at one central portion, a pair of cold inserting member mounting portions longitudinally drilled in the longitudinal direction, and a plurality of mounting fixing holes for fixed mounting to the inversion member; It includes a plurality of cold metal inserting station is fixed to the appropriate position of the cold metal inserting unit installation portion formed on the model jig plate.

In the present invention, the cold insert insertion unit is coupled to the screw hole is perforated to be seated and fixed to the stepped portion of the cold insertion insert mounting portion on both side ends; A central part of the cold fixing groove for inserting and installing in accordance with the outer shape of the cold metal; Both side portions of the cold fixing groove portion includes a support plate to support the side of the cold gold is installed.

In addition, in the present invention, the cold-metal inserting slot has a cold-metal fixing groove having a cold-metal inserting surface formed at different angles, which is fitted to an outer shape of the cold-metal, so that the inserting angle of the cold-gold is accurately set and inserted according to each installation position. It is characterized by.

In the present invention, a plurality of assembling screw holes are perforated at both side end portions of the cold inserting member installation portion, and the assembling screw holes are made of a long hole formed in the longitudinal direction so as to arbitrarily adjust the installation position of the cold inserting member. .

In addition, the cold inserting method using the model jig of the cam shaft mold according to the present invention comprises the steps of positioning the model jig plate mounted on the inverting member rotated 180 degrees about the inverted axis of the inverting device; Temporarily inserting a plurality of cold metals at different angles into a plurality of cold metal insertion tables installed on the model jig plate, and temporarily inserting a filter into a filter installation hole formed at one central portion; Putting a lower mold on the upper side of the model jig plate into which the cold metal and the filter are inserted; Fixing the model jig plate and the lower mold by a gripping means, and then inverting the model jig plate and the lower mold by 180 degrees about an inversion axis; Mounting the model jig plate and the lower mold inverted by 180 degrees on a pedestal; Transferring the coolant and the filter from the model jig plate to the lower mold and removing the model jig plate from the lower mold; And fitting the upper mold onto the lower mold.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a plan view showing the configuration of a model jig which is an embodiment of the present invention, a plurality of cold inserts 120 is fixed to the model jig plate 100, Figure 2 is a front sectional view of Figure 1 and the cold insert of the present invention The state inserted according to the installation position angle of the cold metal 310 inserted into the base 120 is shown.

The model jig of the camshaft mold of the present invention includes a model jig plate 100 having a predetermined thickness; It is composed of a plurality of cold inserts 120 is fixed to the model jig plate 100.

The model jig plate 100 is fixed to the filter installation port 140 formed on one side central portion, a pair of cold inserting unit installation portion 110 and a longitudinally perforated longitudinally in the inner side, and the reversing member 210. A plurality of mounting fixing holes 130 are formed.

A plurality of assembling screw holes 112 are perforated at both side end portions 111 of the cold inserting member installing part 110, and the assembling screw holes 112 can arbitrarily adjust the installation position of the cold inserting member 120. It consists of a long hole formed in the longitudinal direction so that.

In addition, the cold inserting insert 120 is fixed to the appropriate position of the cold insert inserting unit 110 formed on the model jig plate 100 is a plurality of cold inserts different from each other the installation angle of the cold according to the installation position It consists of a stand 120.

Figure 3 shows an exploded perspective view of the cold insert insertion chamber 120 of an embodiment of the present invention.

A coupling piece 121 having a screw hole 122 perforated at both end portions of the cold inserting member 120 to be seated and fixed to the stepped part 111 of the cold inserting member installing part 110; The central portion has a cold fixing groove 123 to be inserted and installed in accordance with the outer shape of the cold metal 310; Both sides of the cold fixing groove 123 is composed of a support plate 124 to support the side of the cold gold 310 is installed.

The cold inserting slot 120 is to be inserted into the insertion angle of the cold gold 310 differently according to each installation position.

The cold metal inserting slot 120 is a cold gold fixing groove 123 in which the cold metal inserting surfaces are formed at different angles to fit the installation angles of the cold metals 310 so that the cold metals 310 can be accurately set according to the position. ).

It looks at the effects of the present invention configured as described above.

4 is a perspective view of a state in which the present invention jig is mounted on the inverting apparatus, and FIG. 5 is a side cross-sectional view showing a step of inserting a cold metal by the present invention jig step by step.

The model jig 100 of the present invention is mounted on the inversion member 210 which is rotated 180 degrees about the inversion shaft 220 of the inversion device 200 as shown in FIG. 310 is pre-inserted and then inverted to the lower mold 301 to be molded and supplied to be inserted at the same time.

5a) is a state in which a plurality of cold metal and filter is inserted into the model jig, b) is a state in which the lower mold is put on the model jig inserted cold and filter, c) is the inverted model jig and the lower mold 180 degrees And d) is a state in which the model jig is removed from the lower mold, and e) is a state in which the upper mold is assembled on the lower mold.

4 and 5a) positioning the model jig plate 100 mounted on the inversion member 210 which is rotated 180 degrees about the inversion shaft 220 upwardly; The plurality of cold metals 310 are temporarily inserted into the plurality of cold metal insertion tables 120 installed on the model jig plate 100 at different angles, and the filter 320 is provided at the filter installation hole 140 formed at one central portion. Temporarily inserting;

As shown in FIG. 5 b), covering the lower mold 301 on the upper side of the model jig plate 100 into which the cold metal 310 and the filter 320 are inserted;

4 and 5c) fixing the model jig plate 100 and the lower mold 301 by the holding means 230, and then inverting the center of the inverted shaft 220 by 180 degrees;

As shown in FIG. 5D), the model jig plate 100 and the lower mold 301 inverted by 180 degrees are mounted on a pedestal, and then the cold metal 310 and the filter 320 are removed from the model jig plate 100. ) Is transferred to the lower mold (301) and the model jig plate 100 is separated from the lower mold (301);

As illustrated in FIG. 5E), the cold mold 310 and the filter 320 may be easily inserted into the mold 300 while the upper mold 302 is fitted and assembled on the lower mold 301. To do that.

The present invention to increase the product reliability of the casting product by the mold to easily insert the cold metal 310 and the filter 320 in the mold 300 while minimizing the deformation of the mold (300). In addition, work is done quickly and accurately.

In particular, the present invention is to enable the unmanned work by applying to the automation system to improve the efficiency of the work, and to improve the quality of the product.

As described above, the present invention pre-inserts the cold metal and the filter which are inserted at various angles and positions inside the mold during the manufacture of the camshaft mold in advance by using a model jig to move the mold into the mold at a time in a precisely set state. This ensures fast and accurate work while minimizing the deformation of molds. In particular, when applied to an automated system, it enables highly efficient work, improving work efficiency and performing uniform work processes at all times. It is a very useful technique to increase the.

Claims (5)

It is mounted on the inversion member 210 which is rotated 180 degrees about the inversion shaft 220, and the filter 320 and the plurality of cold metals 310 are pre-inserted and then inverted into the molded mold 300 so that they can be inserted at the same time. In doing Filter mounting holes 140 formed in one side central portion, a pair of cold metal inserting unit installation portion 110 which is perforated in the longitudinal direction in the longitudinal direction, and a plurality of mounting fixing holes 130 to be fixed to the inversion member 210 Model jig plate 100 of a predetermined thickness and formed; Model jig of a camshaft mold including a plurality of cold inserts 120 is fixed to the appropriate position of the cold insert inserting unit 110 formed on the model jig plate 100. The method of claim 1, The cold inserting table 120 is A coupling piece 121 having a screw hole 122 perforated so as to be seated and fixed to the stepped portion 111 of the cold inserting base mounting portion 110 at both ends; The central portion has a cold fixing groove 123 to be inserted and installed in accordance with the outer shape of the cold metal 310; Model jig of the camshaft mold including a support plate 124 to support the side of the cold gold 310 is installed on both side portions of the cold fixing groove 123. The method according to claim 1 or 2, The cold inserting table 120 is According to each installation position, the insertion angle of the cold metal 310 is provided with a cold fastening groove 123 having a cold metal inserting surface formed at different angles to fit the installation angle outline of each of the cold metal 310 Model jig of the camshaft mold, characterized in that. The method according to claim 1 or 2, A plurality of assembling screw holes 112 are drilled in both side end portions 111 of the cold inserting member installing part 110, and the assembling screw holes 112 can arbitrarily adjust the installation position of the cold inserting member 120. Model jig of the camshaft mold, characterized in that made of a long hole formed in the longitudinal direction. Positioning the model jig plate 100 mounted on the inversion member 210 which is rotated 180 degrees about the inversion shaft 220 of the inversion apparatus 200 upwardly; The plurality of cold metals 310 are temporarily inserted into the plurality of cold metal insertion tables 120 installed on the model jig plate 100 at different angles, and the filter 320 is provided at the filter installation hole 140 formed at one central portion. Temporarily inserting; Covering the lower mold (301) on the upper side of the model jig plate (100) into which the cold metal (310) and the filter (320) are inserted; Fixing the model jig plate 100 and the lower mold 301 by the gripping means 230, and then inverting the model jig plate 100 and the lower mold 301 by 180 degrees about the inversion axis 220; Mounting the model jig plate 100 and the lower mold 301 inverted by 180 degrees on a pedestal; Transferring the cold metal (310) and the filter (320) from the model jig plate (100) to the lower mold (301) and leaving the model jig plate (100) from the lower mold (301); Cooling insertion method using a model jig of the camshaft mold comprising the step of fitting the upper mold (302) on the lower mold (301).

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