WO2005070593A1 - 鋳造機用温度センサおよび鋳造機 - Google Patents
鋳造機用温度センサおよび鋳造機 Download PDFInfo
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- WO2005070593A1 WO2005070593A1 PCT/JP2005/000685 JP2005000685W WO2005070593A1 WO 2005070593 A1 WO2005070593 A1 WO 2005070593A1 JP 2005000685 W JP2005000685 W JP 2005000685W WO 2005070593 A1 WO2005070593 A1 WO 2005070593A1
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- WIPO (PCT)
- Prior art keywords
- mold
- temperature
- molten metal
- temperature sensor
- time
- Prior art date
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
- G01K1/10—Protective devices, e.g. casings for preventing chemical attack
- G01K1/105—Protective devices, e.g. casings for preventing chemical attack for siderurgical use
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/08—Controlling, supervising, e.g. for safety reasons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
- B22D2/006—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass for the temperature of the molten metal
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
Definitions
- the present invention relates to a temperature sensor for a machine used for directly detecting the temperature of a molten metal, and a machine using the temperature sensor.
- a cylinder head of a motorcycle engine has been manufactured by a low-pressure manufacturing method.
- An example of the low-pressure manufacturing machine is disclosed in Japanese Patent No. 3201930.
- a crucible is disposed below a mold composed of a lower mold and an upper mold, and the molten metal stored in the crucible is pressurized and pushed up through a stalk, and the lower crucible is raised.
- a configuration for supplying to the gate of the mold is adopted.
- the operation until the supply start force of the molten metal until the mold is opened is automated.
- the time required to supply the molten metal based on the temperature of the mold and the temperature of the molten metal (hereinafter, this time is referred to as a pressurizing time).
- the molten metal is pressurized for this pressurizing time and supplied into the mold.
- the temperature of the mold is detected by a temperature sensor embedded in the mold, and the temperature of the molten metal is detected by a temperature sensor provided in the crucible.
- the pressurization time is set to a time during which the inside of the mold is filled with the molten metal after the start of pressurization, and further, the solidified portion of the molten metal, which proceeds from the upper part to the lower part of the mold, reaches the inside of the gate.
- the unsolidified portion of the molten metal drops from the inside of the sprue through the stalk into the crucible, and returns to the solidified portion of the molten metal. Only the minute remains in the gate. At this time, the molded product in the mold is in a weak state where fluidity is lost even though it is solidified. 'Dimensional accuracy will be significantly reduced. For this reason, the structure of this machine is such that the mold is opened after the pressurization of the molten metal is completed and the force is waited until the structure solidifies to a hardness that does not deform the structure.
- the time between the end of pressurizing the molten metal and the opening of the mold (hereinafter, this time is called the solidification time) Based on the temperature of the mold at the time of completion, it is calculated by!
- the conventional machine configured as described above cannot detect the temperature of the structure during the formation, and therefore, the molten metal is added at the optimal time according to the speed at which the melt actually solidifies. I could't finish the pressure or open the mold. Therefore, in the conventional machine, the pressurization time and the coagulation time are set to a time having a margin in consideration of a safety factor so that the pressurization and solidification of the molten metal do not end in an incomplete state. I was As a result, in the conventional machine, the cycle time becomes longer and the productivity decreases.
- Such a problem can be solved if the temperature of the structure can be directly detected by the temperature sensor.
- the part that comes into contact with the structure is damaged by the heat or pressing force of the molten metal, or worn by the structure when the mold is opened or released. The problem of suffering damage and damage must be avoided.
- the present invention has been made to solve such a problem, and the present invention does not cause breakage due to heat or pressing force of a molten metal and can be easily removed from a structure.
- a first object is to provide a temperature sensor, and a second object is to reduce the cycle time of a machine using the temperature sensor.
- a temperature sensor for a machine is formed of a material equivalent to the material of a mold, and has a protective fitting tapered so as to form a draft at a tip end thereof, and a protective fitting provided inside the protective fitting.
- a thermocouple that is inserted and connected to the tip of the protective fitting, and is attached to the mold such that the tip of the protective fitting protrudes into the mold space in the mold.
- the protective metal fitting for the temperature sensor for machine according to the inventions according to claim 1 and claim 2 has heat resistance and strength equivalent to those of the mold, and is removed from the structure together with the mold. Therefore, the book Advantageous Effects of Invention According to the invention, a temperature sensor for a building machine that is not damaged by heat or pressure of a molten metal and can be easily removed from the structure without being worn or damaged by the structure when the mold is opened or released. Can be provided.
- the temperature of the molten metal that solidifies later than in the cavity can be directly detected by the temperature sensor. Therefore, when the temperature of the structure reaches a temperature most suitable for stopping the supply of the molten metal or opening the mold, the supply of the molten metal can be stopped or the mold can be opened.
- the supply time of the molten metal and the solidification time from the stop of the supply to the opening of the mold can be reduced as much as possible within a range where the manufactured product becomes a non-defective product.
- the cycle time of the structure can be shortened and the productivity can be further improved.
- the temperature inside the molten metal can be detected, and the protective member of the temperature sensor can be easily removed from the structure after the structure. Therefore, it is possible to accurately detect the temperature of the molten metal while preventing the protective fitting from being damaged when opening the mold and releasing the structure.
- FIG. 1A is a longitudinal sectional view showing a mold to which a temperature sensor according to the present invention is attached.
- FIG. 1B is a cross-sectional view showing a mold to which the temperature sensor according to the present invention is attached.
- FIG. 2 is an enlarged sectional view showing a temperature sensor mounting portion of a lower mold.
- FIG. 3 is an enlarged sectional view showing a temperature sensor.
- FIG. 4 is a flowchart for explaining the operation of the machine.
- FIG. 5 is a graph showing a temperature change of a molten metal in a runner.
- FIG. 6A is a cross-sectional view showing a mold used for a gravitational machine.
- FIG. 6B is a longitudinal sectional view showing a mold used for a gravitational machine.
- FIG. 7A is a cross-sectional view showing a mold used for a gravitational machine.
- FIG. 7B is a longitudinal sectional view showing a mold used for a gravitational machine.
- FIG. 8 is a flowchart for explaining an operation at the time of manufacturing.
- FIG. 9 is a graph showing a temperature change of a molten metal.
- the reference numeral 1 denotes a mold to which the temperature sensor 2 according to this embodiment is attached.
- the mold 1 is mounted on a low-pressure machine (not shown).
- the upper mold 4 is attached to a platen of the machine by an upper support member 3, and the lower support member 5 is mounted on a base of the machine.
- a lower mold 6 supported through the lower mold 6.
- This machine is configured to raise and lower the upper mold 4 with respect to the lower mold 6 by driving a platen, thereby performing mold clamping and mold opening.
- the metal material produced by the mold 1 is an aluminum alloy.
- the upper mold 4 has a cavity 7 opening downward, and the lower mold 6 has a cavity 8 opening upward.
- the cavities 7 and 8 are recesses for molding a product part of a structure.
- the upper mold 4 and the lower mold 6 are provided with a heater (not shown) for preheating them to a manufacturing temperature, and a water-cooled cooling device (not shown) for maintaining a constant mold temperature during the manufacturing. Is provided.
- a runner 9 is formed on the inner bottom of the lower mold 6 so as to extend from one side of the cavity 8 to the other side.
- a gate 10 is formed at the inner bottom of the lower mold 6 so as to extend downward from the bottom of the runner 9, and the temperature sensor 2 according to the present invention is attached so as to face the inside of the runner 9. .
- the gate 10 is formed in an oval shape as viewed from above at the bottom of the lower mold 6, as shown in FIG. 1B, and as shown in FIG. 2, the opening diameter gradually increases toward the upper side to form a draft angle. It is perforated as follows.
- a filter 11 for preventing foreign matter from flowing into the mold is attached to an opening at the upper end of the gate 10, and a gate provided on the lower support member 5 is provided at a lower end of the gate 10.
- the upper end of the cup 12 is connected.
- the sprue cup 12 penetrates the lower supporting member 5 in the up-down direction, and a stoke for supplying molten metal (shown in FIG.
- the molten metal 13 is supplied from the upper end portion (not shown).
- the lower end of the stalk is immersed in a molten metal in a crucible (not shown) housed in a furnace body (not shown), and the molten metal is pressed by pressing the molten metal surface in the crucible during fabrication.
- the hot water 13 also enters the spout 10 through the spout 10 cups in stalk power.
- the molten metal 13 also passes through the filter 11, enters the runner 9 through the filter 11, and is further supplied to the cavities 7 and 8.
- the molten metal 13 thus filled in the mold 1 begins to solidify in the cavities 7, 8 ⁇ product part 14 (see FIG. 2) ⁇ .
- the solidified portion of the molten metal 13 reaches the runner 9 from the cavities 7 and 8 with the passage of time, and further proceeds into the gate 10.
- the temperature of the molten metal 13 in the runner portion which is a part of the structure, is directly detected by the temperature sensor 2 described later.
- the solidification state of the molten metal 13 is a force that can be detected by the temperature of the molten metal 13. This machine terminates the pressurization of the molten metal 13 when the solidified portion advances to near the boundary between the gate 10 and the runner 9. I do.
- the machine opens the mold when the temperature of the molten metal 13 (manufactured material) decreases to a temperature at which the mold can be opened.
- the temperature sensor 2 is formed integrally with a protection part 2a extending in the vertical direction and a support part 2b formed at the base end of the protection part 2a so that the temperature sensor 2 has an axial direction inside.
- a protective bracket 22 having a through hole 21 penetrating through the hole is provided.
- the temperature sensor 2 includes a thermocouple 23 inserted into the through hole 21 described above, and is fitted into a mounting hole 24 formed in the lower mold 12.
- the mounting hole 24 has a small-diameter portion 24a that opens into the runner 9 and into which the protection portion 2a is fitted, and a large-diameter portion 24b that opens outside the mold and into which the support portion 2b fits. It is formed from The mounting hole 24 extends in the mold opening direction (vertical direction in FIG. 3) near the side of the sprue 10 in the lower mold 6 so as to penetrate the lower mold 6! RU
- the protective fitting 21 is in a state where the mounting position is regulated so that the support portion 2b is fitted into the large-diameter portion 24b so that the protective fitting 21 is not further inserted into the mold 1 from the illustrated position. And is attached to the lower mold 6.
- the material forming the protective fitting 22 is the same as the material of the lower mold 6, and in this embodiment, alloy tool steel for hot mold (SKD) is used. ing.
- the protection part 2a of the protection fitting 22 is formed to have a length such that the temperature detection part 25 on the distal end side projects into the runner 9 in a state of being fitted into the mounting hole 24 together with the support part 2b.
- the protective fitting 22 is attached to the lower mold 12 in a state where the temperature detecting portion 25 projects into the mold space (runner 9) in the mold.
- the temperature detecting portion 25 of the protective fitting 22 is formed so that the outer diameter dimensional force S gradually decreases toward the front end.
- the structure space includes, in addition to the runner 9, other parts filled with the molten metal in the mold 1, such as cavities 7, 8 and gates 10.
- the temperature detecting portion 25 of the protective fitting 22 has a taper that forms a draft.
- the temperature detector 25 constitutes the tip of the temperature sensor according to the present invention.
- the top part 25a of the temperature detecting part 25 is formed in a hemispherical shape that is convex upward, and the tips of two types of conductive wires 23a and 23b of the thermocouple 23 are welded. . That is, with the ends of the conductors 23a and 23b inserted into the through-hole 24 facing the opening of the top 25a, they are welded using a welding rod made of the same alloy tool steel for hot die (SKD). The opening was closed by welding, and then hemispherically polished.
- thermocouple 23 a well-known alumel-chromel type thermocouple is used, and two types of conductive wires which are welded to the temperature detecting portion 25 of the protective bracket 22 and are electrically connected to each other are used. 23a and 23b.
- the temperature sensor 2 detects the temperature of the molten metal 13 that comes into contact with the top 25a (the portion where the thermocouple 23 is welded) of the protective fitting 22 (protective portion 2a). I do.
- the two conductors 23a and 23b pass through the support 2b from the inside of the protective fitting 22 to the outside of the lower mold 6, and pass through the inside of a stainless steel conduit 26 welded to the support 2b. Then, it is connected to the control device 31 of the machine (see FIGS. 1A and 1B).
- the heat-resistant insulating powder 27 is filled in the through holes 21 and around the conductors 23a and 23b. Examples of the heat-resistant insulating powder 27 include magnesia (MgO) used in glow plugs for diesel engines.
- MgO magnesia
- the control device 31 is for controlling the operation of the machine having the mold 1 described above, and includes a melt temperature controller, a mold temperature controller, a pressurizing pressure controller, and a mold condition setting. For containers Therefore, it is constituted.
- the molten metal temperature controller controls the temperature of the furnace heater so that the molten metal 13 in the crucible is heated to a set temperature.
- the set temperature of the molten metal 13 is set for each die to be used by a manufacturing condition setting device described later.
- the mold temperature controller controls the temperature of the heater and the cooling device in the mold 1 so that the mold 1 is heated to a set temperature.
- the set temperature of the mold 1 is set for each one to be used by a manufacturing condition setting device described later.
- the pressurizing pressure controller switches the operation and stop of a pressurizing device (not shown) that pressurizes the molten metal 13 in the crucible, and also controls the speed of the molten metal 13 supplied from the crucible into the mold 1 to the set speed.
- the gas supply amount of the pressurizing device is controlled so as to be as follows.
- the set speed is set for each die used by a manufacturing condition setter described later.
- the production condition setting device is configured to store data having production conditions such as a mold temperature, a molten metal temperature, a pressurization time, a “solidification time”, and a supply speed of the molten metal 13 corresponding to each mold used in the production.
- the production condition setting device outputs a start signal for causing the pressurizing pressure controller to start pressurizing the melt 13 and a stop signal for terminating the pressurization of the melt 13 at predetermined times.
- the manufacturing condition setting device sends a mold clamping signal for lowering the upper mold 4 and a mold opening signal for raising the upper mold 4 to the driving device 13 at a predetermined time.
- the stop signal and the mold opening signal are determined by the temperature detected by the temperature sensor 2 at a predetermined temperature Tl, temperature ⁇ 2 (see FIG. 5). Sent when reached.
- the temperature T1 is the optimum temperature for ending the pressurization of the molten metal 13, and the solidification of the molten metal 13 causes the fluidity of the molten metal 13 in the product part, the runner part and the upper part of the sprue to be lost, and the molten metal 13 on the stalk side from the upper part of the sprue.
- the temperature is set so that the fluidity of the liquid is maintained.
- the temperature T1 is set to the maximum temperature such that only the molten metal 13 on the stalk side flows down from the upper part of the gate to the crucible side even if the pressurization by the pressurizing device is stopped.
- the temperature T1 is set such that the upper part of the filter 11 remains in the structure.
- Temperature ⁇ 2 is the optimal temperature for opening the mold.It is lower than temperature T1, and the shape of the structure changes even if the mold is opened.
- the temperature is set to the maximum temperature at which the molten metal 13 solidifies to the hardness.
- the manufacturing condition setting device is a non-defective product even if the function of the temperature sensor 2 is impaired for some reason and the temperatures Tl and T2 cannot be detected by the temperature sensor 2. It is configured so that it can be manufactured.
- the steelmaking condition setting device increases the pressure of the molten metal 13 by the time (pressing time and solidification time) without using the temperature detected by the temperature sensor 2.
- a configuration is adopted in which the end time and the mold opening time are set. More specifically, if the temperature sensor 2 becomes defective or has a defective force for some reason, a predetermined pressurizing time has elapsed since the pressurization of the molten metal 13 was started. The pressurization of the molten metal 13 is sometimes terminated.
- the production condition setting device is configured such that when the pressurization of the molten metal 13 is completed, the mold is opened when the force also elapses a predetermined solidification time.
- the pressurization time is the time from the start of the supply of the molten metal 13 to the time when the solidified portion of the molten metal 13 reaches the gate 10, and the temperature of the mold 1 at the start of the supply of the molten metal 13 and the temperature of the molten metal 13 in the crucible. Based on and, it is obtained by calculation corresponding to the type of the mold 1 used.
- the solidification time is a time required from the end of pressurizing the molten metal 13 to the time when the structure in the mold 1 is not easily deformed and solidified to a hardness.
- the solidification time is obtained by calculation based on the temperature of the mold 1 at the time when the pressurization of the molten metal 13 is completed, corresponding to the type of the mold 1.
- the pressurizing time and the coagulation time may be stored in a memory (not shown) as a map in advance and read out from the memory.
- the construction work is started by, for example, turning on a start switch (not shown) while the mold 1 is clamped.
- a start switch not shown
- the non-defective product range is a temperature range in which the structure becomes a non-defective product, and is set for each mold. If the result of this determination is NO, that is, if the temperature is out of the non-defective range, the process proceeds to step S2, where the manufacturing condition setting device performs an alarm process for notifying the operator of the temperature abnormality, and stops the subsequent manufacturing operation. .
- the production condition setting device performs the pressurizing time of the molten metal 13 that is essential when executing the production program when the function of the temperature sensor 2 is impaired. (Step S3). Thereafter, the production condition setting device sends a start signal to the pressurizing pressure controller together with data indicating the supply speed of the molten metal 13 in step S4. By sending the start signal to the pressurizing pressure controller in this manner, the inert gas is supplied into the furnace by the pressurizing device.
- the molten metal 13 is pressurized and supplied into the mold 1 through the sprue cup 12, the sprue 10, and the filter 11.
- the molten metal 13 filled in the cavities 7 and 8 solidifies from the product part 14 in the cavities 7 and 8.
- the solidified portion of the molten metal 13 falls with the passage of time and proceeds from the inside of the runner 9 to the inside of the gate 10.
- a timer (not shown) starts measuring time.
- the manufacturing condition setting device detects the temperature of the molten metal 13 in the runner 19 by the temperature sensor 2 of the lower mold 6 in step S5.
- the temperature detected by the temperature sensor 2 rises rapidly after the start of production (after the start of supply of the molten metal 13) and remains unchanged for a certain period of time (a state in which the molten metal 13 flows through the runner 9). It gradually decreases after passing through.
- the setting device compares the maximum value of the temperature detected by the temperature sensor 2 with a predetermined temperature range, and if the maximum temperature is within the set temperature range, the temperature sensor 2 is normal. Is determined. When the maximum temperature is out of the set temperature range, the construction condition setting device determines that the temperature sensor 2 is not functioning normally (abnormal).
- step S6 If it is determined in step S6 that the temperature sensor 2 is abnormal, when the elapsed time measured by the timer reaches the pressurizing time obtained in step S3, the pressurizing condition setting device sets the pressurizing condition setter. Send a stop signal to the pressure controller. Stop signal sent to pressurized pressure controller As a result, the pressurizing device stops supplying the inert gas, and the pressurization of the molten metal 13 ends (step S7). At about the same time as the supply of the molten metal 13 is stopped, the manufacturing condition setting device calculates the solidification time based on the temperature of the mold 1 at that time (step S8).
- step S7 When the supply of the molten metal 13 is stopped in step S7, the unsolidified molten metal 13 of the molten metal 13 in the mold falls from the gate 10 through the gate cup 12 and the stalk into the crucible. Returned.
- the melt 13 remaining in the mold 1 (the melt whose fluidity has been lost) is further solidified so as to increase in hardness because the supply of heat is stopped (step S9).
- a timer (not shown) starts counting time. Thereafter, the production condition setting device sends a mold opening signal to the drive device 13 after the time measured by the timer has reached the coagulation time.
- the mold opening signal is sent to the driving device 13, the upper mold 4 is raised by the driving device 13, and the mold is opened (Step 10 ⁇ Step 11).
- step S12 If the result of the determination in step S6 is YES, that is, if it is determined that the temperature sensor 2 is functioning normally, in step S12, the production condition setting device is turned on by the temperature sensor 2 and the molten metal 13 in the runner 9 To detect the temperature. At this time, the temperature detected by the temperature sensor 2 changes as shown in FIG. 5, and gradually decreases as the solidification of the molten metal 13 progresses after reaching the maximum temperature.
- the manufacturing condition setting device sends a stop signal to the pressurizing pressure controller. When this stop signal is sent to the pressurizing pressure controller, the pressurizing device stops the supply of the inert gas and the pressurization of the molten metal 13 ends (step S14).
- the fabrication condition setting device always detects the temperature of the molten metal 13 in the runner section by the temperature sensor 2 as shown in steps S15 and S16. Then, when the temperature of the molten metal 13 detected by the temperature sensor 2 decreases to a predetermined temperature T2, the production condition setting device determines that the solidification has ended and sends a mold opening signal to the drive device 13.
- Step Sl l By sending the mold opening signal to the driving device 13 in this manner, the driving device 13 Die 4 rises and the die opens (Step Sl l), and one fabrication operation ends.
- This temperature is detected when the structure rises with the upper mold 4 when the mold is opened, or when the structure is released from the lower mold 6 even when the structure remains in the lower mold 6 when the mold is opened.
- the part 25 can be easily removed from the structure. This is because a taper forming a draft is formed in the temperature detecting section 25 of the temperature sensor 2.
- the protective bracket 22 including the temperature detecting section 25 and the thermocouple welded section are made of the same material as the mold and have excellent wear resistance, so that abrasion with the structure at that time is suppressed. You.
- the molten metal 13 flows from the gate 10 of the lower mold 6 to the runner 1 9. And comes into contact with the protective fitting 22 of the temperature sensor 2.
- the temperature of the molten metal 13 in the runner portion that becomes a part of the structure can be directly detected by the temperature sensor 2.
- the machine equipped with the temperature sensor 2 can directly detect the temperature of the structure during the structure, so that the optimum time corresponding to the speed at which the molten metal 13 actually solidifies can be determined.
- the pressurization of the molten metal 13 can be completed and the mold can be opened, and the cycle time can be shortened.
- the temperature sensor 2 has the same heat resistance and mechanical strength as the mold 1 because the protective fitting 22 is made of the same material as the material of the lower mold 6. Therefore, the temperature sensor 2 is not damaged by the heat or pressure of the molten metal 13. Further, the protective fitting 22 is tapered so as to form a draft in the temperature detecting unit 25 in combination with the fact that the protective fitting 22 is formed of the same material as the mold 1. Therefore, despite the fact that the molten metal 13 solidifies while coming into contact with the molten metal 13 and forms a structure, the protective metal fitting 22 is not worn or damaged by the structure when the mold is opened or released, and is protected by the metal mold 1. ⁇ It comes off easily from structures.
- the temperature sensor 2 is mounted on the lower mold 6 with the temperature detecting portion 25 of the protective fitting 22 facing the inside of the runner 9, and detects the temperature of the top 25 a of the temperature detecting portion 25. To detect. Therefore, the temperature sensor 2 can detect the temperature inside the molten metal 13 located in the runner 9, that is, the temperature of the molten metal 13 closest to the product portion 14. it can. Therefore, it is possible to detect the temperature of the structure with high accuracy while preventing traces of the temperature sensor 2 from being formed on the product portion. Note that, in this embodiment, an example has been described in which the temperature sensor 2 is provided at a position where the temperature detection unit 25 faces the inside of the runner 9; It can be changed as appropriate, such as nagabi cavities 7, 8 and gate 10.
- FIGS. 6A, 6B, 7A, and 7B are views showing a mold used for a gravity-forming machine.
- A is a cross-sectional plan view
- B is a longitudinal cross-sectional view.
- FIG. 8 is a flowchart for explaining the operation at the time of manufacturing
- FIG. 9 is a graph showing a temperature change of the molten metal.
- the gravity-forming mold 41 includes a first mold 42 and a second mold 43 formed so that the mold opening direction is horizontal. And the hot water ⁇ 47 force is formed on the cavities 44, 45!
- the first mold 42 and the second mold 43 are mounted on a mold driving device (not shown), and the driving device performs mold clamping and mold opening.
- the molten metal 13 is supplied into the cavities 44 and 45 from the feeders 46 and 47.
- a spout 48 is formed on the side of the feeder portions 46 and 47 so as to open upward, and a cavity 44 is formed from the spout 48 through a runner 49. , 45, the molten metal 13 is supplied to the bottom.
- the temperature sensors 2 are provided in the feeders 46 and 47.
- the temperature sensor 2 is the same as that used in the first embodiment, and the temperature detection unit 25 projects in the mold opening direction because the inner wall surface force of the feeder unit 46 is also inside the mold. It is attached to the first mold 42 in the state. That is, also in this case, the temperature sensor 2 is provided at a portion where the molten metal 13 solidifies later than the cavities 44 and 45.
- the temperature sensor 2 can be provided at the gate 48.
- the gravity-forming machine provided with the mold 41 configured as described above is controlled by a control device (not shown) as shown in Fig. 8. That is, first, in step P1 of the flowchart shown in FIG. 8, the control device determines whether or not the current temperature of the mold 41 and the temperature of the molten metal 13 are within the non-defective range.
- the non-defective range is a temperature range in which the structure becomes a non-defective product, and is set for each mold. If the result of this determination is NO, that is, if the temperature is out of the non-defective range, the process proceeds to step P2, where the control device performs an alarm process for notifying the operator of a temperature abnormality, and stops the subsequent fabrication operation.
- this machine supplies the molten metal 13 into the mold 41 by, for example, a molten metal supply device (not shown) so that the mold 41 is filled with the molten metal 13 ( (Step P3).
- the control device calculates the solidification time of the molten metal 13 which is indispensable when executing the production program when the function of the temperature sensor 2 is impaired. At this time, the timer starts counting time.
- the control device After supplying the molten metal 13 into the mold 41 as described above, the control device, as shown in Step P4, controls the temperature of the molten metal 13 in the pusher portions 46, 47 or the spout 48 by the temperature sensor 2. Is detected. As shown in FIG. 9, the temperature detected by the temperature sensor 2 rises rapidly after the start of the production (start of pouring), and gradually decreases after a state in which it does not change for a certain period. Thereafter, in step P5, the control device determines that the temperature sensor 2 is normal when the maximum value of the temperature detected by the temperature sensor 2 is within the predetermined temperature range, and determines that the maximum value is out of the temperature range. It is determined that the temperature sensor 2 is not functioning normally (abnormal) when the value is in.
- step P5 If it is determined in step P5 that the temperature sensor 2 is abnormal, the control device waits until the elapsed time measured by the timer 1 reaches the solidification time calculated in step P3 (step S5). P6) Then, a mold opening signal is sent to the mold driving device. In this way, the mold is opened by sending the mold opening signal to the mold driving device (step P7).
- Step P5 determines whether the determination result in Step P5 is YES, that is, if the temperature sensor 2 is functioning normally. If the determination result in Step P5 is YES, that is, if the temperature sensor 2 is functioning normally, the control device detects the temperature of the molten metal 13 by the temperature sensor 2 in Step P8.
- the temperature detected by the temperature sensor 2 changes as shown in FIG. After that, the temperature decreases as the solidification of the molten metal 13 progresses.
- the control device opens the mold by the mold driving device (Step P7).
- the temperature T3 is set to the maximum temperature at which the molten metal 13 solidifies to a hardness that does not change the shape of the structure even when the mold is opened. By opening the mold in this way, one fabrication operation is completed.
- the temperature detection unit 25 of the temperature sensor 2 has a taper that forms a draft so that the temperature detection unit 25 can be easily separated from the structure. Can be removed.
- the temperature of the molten metal 13 is directly detected by the temperature sensor 2, and the mold opening timing can be determined based on this temperature.
- the mold 41 can be opened at an optimal time according to the state of the structure.
- the solidification time of the molten metal 13 can be shortened to the minimum necessary range that makes the product non-defective, so that the solidification time does not become unnecessarily long or short, thereby further improving productivity. Can be done.
- the present invention can be used in manufacturing parts such as a cylinder head of a vehicle engine, a marine engine, and other general-purpose engines.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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KR1020067014490A KR101131433B1 (ko) | 2004-01-21 | 2005-01-20 | 주조기용 온도센서 및 주조기 |
BRPI0506940A BRPI0506940B1 (pt) | 2004-01-21 | 2005-01-20 | termosensor para máquina de fundição e máquina de fundição |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004012880A JP2005205436A (ja) | 2004-01-21 | 2004-01-21 | 鋳造機用温度センサおよび鋳造機 |
JP2004-012880 | 2004-01-21 |
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WO2005070593A1 true WO2005070593A1 (ja) | 2005-08-04 |
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PCT/JP2005/000685 WO2005070593A1 (ja) | 2004-01-21 | 2005-01-20 | 鋳造機用温度センサおよび鋳造機 |
Country Status (6)
Country | Link |
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JP (1) | JP2005205436A (ja) |
KR (1) | KR101131433B1 (ja) |
CN (1) | CN100400201C (ja) |
BR (1) | BRPI0506940B1 (ja) |
TW (1) | TW200539969A (ja) |
WO (1) | WO2005070593A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103808421A (zh) * | 2014-01-22 | 2014-05-21 | 东风商用车有限公司 | 一种缸盖测温用铠装热电偶总成及其制作和安装方法 |
EP3770413A1 (fr) * | 2019-07-23 | 2021-01-27 | M.C. Aeronautique | Chambre de combustion d'un moteur thermique integrant une sonde de temperature et moteur thermique associe |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
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CN101618440B (zh) * | 2009-04-30 | 2013-09-18 | 湖南镭目科技有限公司 | 连铸机结晶器及其温度检测装置 |
EP2578333A1 (de) * | 2011-10-07 | 2013-04-10 | Nemak Linz GmbH | Verfahren zum Steuern einer Giessanlage |
KR101416577B1 (ko) * | 2012-10-04 | 2014-07-07 | 한국타이어 주식회사 | 혼합기용 온도계 |
CN104325113A (zh) * | 2014-10-10 | 2015-02-04 | 镁联科技(芜湖)有限公司 | 模具的自锁料结构以及压铸成型模具 |
CN104439062B (zh) * | 2014-12-08 | 2016-11-16 | 中国南方航空工业(集团)有限公司 | 用于铸造过程中测量温度的模具及其制造方法 |
CN105486420A (zh) * | 2015-11-19 | 2016-04-13 | 成都兴宇精密铸造有限公司 | 挤压铸造机压射机构的温度检测器 |
KR101772594B1 (ko) * | 2015-12-04 | 2017-08-29 | 주식회사 포스코 | 측온기 거치대 |
CN105562656B (zh) * | 2016-01-26 | 2021-07-02 | 广东鸿图武汉压铸有限公司 | 一种模具型腔内的压铸实时监测装置 |
CN106734996A (zh) * | 2017-01-19 | 2017-05-31 | 珠海肯赛科有色金属有限公司 | 一种铸件实凝固测温方法 |
KR101950022B1 (ko) * | 2017-06-13 | 2019-02-20 | 한국생산기술연구원 | 주물제조 모니터링 시스템 및 이를 이용하는 폐순환 사재생 주물제조 방법 |
CN112692245B (zh) * | 2021-03-25 | 2021-06-22 | 上海鑫蓝海自动化科技有限公司 | 真空精密铸造炉测温装置 |
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- 2005-01-20 WO PCT/JP2005/000685 patent/WO2005070593A1/ja active Application Filing
- 2005-01-20 CN CNB2005800026231A patent/CN100400201C/zh active Active
- 2005-01-20 BR BRPI0506940A patent/BRPI0506940B1/pt active IP Right Grant
- 2005-01-20 KR KR1020067014490A patent/KR101131433B1/ko active IP Right Grant
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JPH0994653A (ja) * | 1995-09-29 | 1997-04-08 | Kobe Steel Ltd | 低圧鋳造装置及び低圧鋳造方法 |
JP2004195481A (ja) * | 2002-12-16 | 2004-07-15 | Fuji Heavy Ind Ltd | 重力鋳造法および重力鋳造装置 |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN103808421A (zh) * | 2014-01-22 | 2014-05-21 | 东风商用车有限公司 | 一种缸盖测温用铠装热电偶总成及其制作和安装方法 |
EP3770413A1 (fr) * | 2019-07-23 | 2021-01-27 | M.C. Aeronautique | Chambre de combustion d'un moteur thermique integrant une sonde de temperature et moteur thermique associe |
FR3099230A1 (fr) * | 2019-07-23 | 2021-01-29 | M.C. Aeronautique | ] chambre de combustion d’un moteur thermique integrant une sonde de temperature et moteur thermique associe |
Also Published As
Publication number | Publication date |
---|---|
JP2005205436A (ja) | 2005-08-04 |
TW200539969A (en) | 2005-12-16 |
KR101131433B1 (ko) | 2012-03-29 |
CN100400201C (zh) | 2008-07-09 |
KR20070001097A (ko) | 2007-01-03 |
BRPI0506940A (pt) | 2007-06-12 |
CN1909999A (zh) | 2007-02-07 |
BRPI0506940B1 (pt) | 2015-12-29 |
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