JP2018061991A - Core gripping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a core gripping device that is able to hinder deterioration of a gripping part provided to grip a core.SOLUTION: A core gripping device 1 according to the present invention has pickers 13a, 13b for gripping a core 20. The pickers 13a, 13b comprise gripping parts 14a, 14b, respectively, which are able to expand and contract by using a fluid. By inserting and expanding the gripping parts 14a, 14b into hole parts 26a, 26b, respectively, formed in the core 20, the core 20 is gripped. Nozzles 15a, 15b for cooling a mold 32 accommodating the core 20 by jetting gas are provided at the respective leading ends of the gripping parts 14a, 14b.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a core gripping device.

  The casting core is a mold used to form a hollow portion in a casting to be produced. Traditionally, the core was manually placed in the mold. However, in recent years, it has become important to arrange the core with high precision in the mold as the casting becomes highly accurate. For this reason, there is a need for a core gripping device that can place the core in the mold with high accuracy.

  Patent Document 1 discloses a technique related to a transport device for transporting a casting core.

Japanese Translation of National Publication No. 05-509071

  As one of the core gripping devices that grip the core, there is a core gripping device that grips the core using a picker that includes a gripping portion that can expand and contract at the tip. In this core gripping device, a picker gripping portion is inserted into a hole formed in the core, the gripping portion is expanded, and the picker is fixed to the core hole to grip the core. In such a core gripping device, since the core is gripped by expanding and contracting the gripping portion, it is necessary to use an elastic member for the gripping portion.

  However, since the elastic member constituting the gripping part is vulnerable to heat, when the temperature of the mold for storing the core is high, heat is transferred from the mold to the gripping part when the core is stored in the mold. As a result, there is a problem that the gripping portion deteriorates.

  In view of the above problems, an object of the present invention is to provide a core gripping device capable of suppressing deterioration of a gripping part that grips the core.

  A core gripping device according to the present invention is a core gripping device that grips a core, and includes a gripping portion that can be expanded and contracted using a fluid, and the gripping portion is formed in a hole formed in the core. It has a picker which grasps the above-mentioned core by inserting and expanding from the vertical direction. And the nozzle for blowing the gas and cooling the metal mold | die which accommodates the said core is provided in the front end side of the said holding part.

  In the core gripping device having the above configuration, when the core is placed in the mold, the mold can be cooled by blowing gas from the nozzle. Therefore, since it can suppress that heat is transmitted from a metal mold | die to a holding part when putting a core in a metal mold | die, it can suppress that a holding part deteriorates with a heat | fever.

  According to the present invention, it is possible to provide a core gripping device capable of suppressing deterioration of a gripping part that grips the core.

It is a front view which shows the core holding | gripping apparatus concerning embodiment. It is an expanded sectional view near the holding part with which the core holding device concerning an embodiment is provided. It is a top view which shows an example of the core hold | gripped using the core holding | grip apparatus concerning embodiment. It is sectional drawing which shows the state which the core holding | gripping apparatus concerning embodiment hold | grips a core. It is sectional drawing for demonstrating the operation | movement at the time of the core holding | gripping apparatus concerning embodiment holding a core. It is sectional drawing for demonstrating the operation | movement at the time of the core holding | gripping apparatus concerning embodiment holding a core. It is sectional drawing for demonstrating the operation | movement at the time of the core holding | gripping apparatus concerning embodiment holding a core. It is sectional drawing for demonstrating the operation | movement at the time of the core holding | gripping apparatus concerning embodiment holding a core. It is sectional drawing for demonstrating the operation | movement at the time of the core holding | gripping apparatus concerning embodiment holding a core. It is sectional drawing for demonstrating the operation | movement at the time of the core holding | gripping apparatus concerning embodiment holding a core. It is sectional drawing for demonstrating the operation | movement at the time of the core holding | gripping apparatus concerning embodiment holding a core.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a front view illustrating a core gripping device according to an embodiment. As shown in FIG. 1, the core holding device 1 includes a support unit 10, a control unit 11, a drive unit 12, and pickers 13a and 13b. Each of the pickers 13a and 13b is fixed to the support portion 10 so as to extend downward from the lower surface of the support portion 10 (z-axis minus direction). Since the support part 10 and the pickers 13a and 13b need to grip and support the core, a certain degree of strength is required. For example, the support unit 10 and the pickers 13a and 13b can be configured using a metal material.

  Grip portions 14a and 14b are provided at the tips of the pickers 13a and 13b, respectively. The gripping portions 14a and 14b are configured to be able to expand and contract using a fluid such as gas or liquid (hereinafter, a case where gas is used will be described as an example), and may be configured using an elastic member such as rubber, for example. can do. For example, the gripping portions 14a and 14b can be configured using rubber balloons. In addition, nozzles 15a and 15b capable of ejecting gas are provided at the distal ends of the pickers 13a and 13b, in other words, at the distal ends of the gripping portions 14a and 14b.

  FIG. 2 is an enlarged cross-sectional view of the vicinity of the gripping portion 14 a included in the core gripping device 1. As shown in FIG. 2, a grip 14a is provided at the tip of the picker 13a. The gripping part 14a is connected to the pipe 17, and when the gas is supplied from the pipe 17, the gripping part 14a expands. Conversely, when the gas is extracted from the gripping portion 14a through the pipe 17, the gripping portion 14a contracts.

  The nozzle 15 a is connected to the pipe 18. The pipe 18 passes through the inside of the pipe 17. That is, the pipe 17 and the pipe 18 are configured using double pipes. The pipe 18 penetrates the inside of the gripping part 14a, and the tip of the pipe 18 is exposed to the outside on the tip side of the gripping part 14a. That is, in the case shown in FIG. 2, the tip of the pipe 18 forms the nozzle 15a. In FIG. 2, the vicinity of the gripping portion 14 a of the core gripping device 1 has been described, but the gripping portion 14 b has the same configuration.

  The drive unit 12 shown in FIG. 1 is configured to be able to move the support unit 10. Since the pickers 13a and 13b are fixed to the support portion 10, the pickers 13a and 13b fixed to the support portion 10 move when the drive portion 12 moves the support portion 10. For example, the drive unit 12 can move the support unit 10 along the x axis, the y axis, and the z axis. For example, a robot arm can be used for the drive unit 12.

  The control unit 11 controls the drive unit 12. Specifically, the control unit 11 moves the support unit 10 using the drive unit 12 to move the pickers 13a and 13b to predetermined positions. Moreover, the control part 11 controls expansion | swelling and shrinkage | contraction of the holding parts 14a and 14b with which each picker 13a and 13b is provided. For example, the control unit 11 connects the compressed gas (primary side) supplied to the control unit 11 to the piping 16 (in the case of the gripping portion 14a, the piping 17 shown in FIG. 2) that connects the gripping portions 14a and 14b. A solenoid valve (not shown) for switching between the case where the pipe 16 and the exhaust port (vent) are connected. By switching this solenoid valve, each picker 13a, 13b The expansion and contraction of the gripping portions 14a and 14b provided is controlled.

  Specifically, the control unit 11 can expand the gripping units 14 a and 14 b by supplying the compressed gas (primary side) supplied to the control unit 11 to the pipe 16. Moreover, the control part 11 can contract the holding parts 14a and 14b by connecting the piping 16 to an exhaust port (vent). Each of the gripping portions 14a and 14b may be configured to expand and contract at the same timing, or may be configured to expand and contract at an independent timing. For example, the piping connected to each gripping part 14a, 14b is made into a separate system, so that each gripping part 14a, 14b can be expanded and contracted at an independent timing.

  Moreover, the control part 11 controls supply of the gas to the nozzles 15a and 15b provided at the front-end | tip of each picker 13a and 13b. For example, the control unit 11 may or may not supply the compressed gas (primary side) supplied to the control unit 11 to a pipe (pipe 18 in the case of FIG. 2) connected to the nozzles 15a and 15b. A switching electromagnetic valve (not shown) is provided, and gas supply to each nozzle 15a, 15b is controlled by switching the electromagnetic valve.

  FIG. 3 is a plan view showing an example of the core gripped by using the core gripping device 1. As shown in FIG. 3, the core 20 includes a core main body 21 and baseboard parts 24 and 25. The core body 21 is formed with molds 22a to 22c for forming a hollow portion in the casting. Each of the molds 22a to 22c has the same shape, and by casting each mold 22a to 22c in each casting mold, a hollow portion corresponding to each mold 22a to 22c is formed in the casting. Can be formed.

  The baseboard portions 24 and 25 are portions provided so that the core 20 is stabilized when the core 20 is placed in a mold. In the example illustrated in FIG. 3, both end portions of the core body portion 21 are extended. And formed. For example, when the core 20 is placed in a mold, the baseboard parts 24 and 25 are supported by the mold. Further, holes 26a, 26b, 27a, 27b for holding the core 20 are formed in the baseboard parts 24, 25. The holes 26a, 26b, 27a, 27b open in the vertical direction (z-axis direction) and are formed to extend in the vertical direction (z-axis direction). For example, the core 20 is formed using sand.

  FIG. 4 is a cross-sectional view showing a state where the core holding device according to the present embodiment is holding the core. The cross-sectional view of the core shown in FIG. 4 shows a cross section obtained by cutting the base plate portion 24 of the core 20 shown in FIG. In the present embodiment, each picker 13a, 13b is inserted into a hole 26a, 26b formed in the base plate 24 of the core 20, and a grip 14a provided at the tip of each picker 13a, 13b. 14b is inflated to hold the baseboard 24. That is, by inflating the gripping portions 14a and 14b inside the holes 26a and 26b, a frictional force is generated between the inner walls of the holes 26a and 26b and the gripping portions 14a and 14b, and the pickers 13a and 13b The baseboard 24 of the child 20 is fixed.

  4 shows a state in which the core gripping device 1 is gripping one of the baseboard portions 24 of the core 20 shown in FIG. 3, but the core gripping device 1 is the other side of the core 20. The same applies to the case where the baseboard portion 25 is gripped. Similarly, when the core gripping device 1 grips the other baseboard portion 25 of the core 20, the picker gripping portions are inserted into the holes 27 a and 27 b of the baseboard portion 25 and expanded to grip the core. To do. In this manner, the support unit 10 of the core gripping device 1 is moved using the drive unit 12 in a state in which the baseboards 24 and 25 (see FIG. 3) of the core 20 are gripped using the core gripping device 1. By doing so, the core 20 can be moved.

  Next, the operation | movement which grips a core using the core holding | gripping apparatus concerning this Embodiment is demonstrated in detail using sectional drawing shown to FIG. 5A-FIG. 5G. Below, operation | movement until the core 20 (baseboard part 24) currently mounted on the mounting base 31 is stored in the metal mold | die 32 (refer FIG. 5G) using the core holding | grip apparatus 1 is demonstrated.

  First, as shown to FIG. 5A, the core holding | gripping apparatus 1 is moved to the place where the core 20 (baseboard part 24) is set | placed. Specifically, the support unit 10 of the core gripping device 1 is moved using the drive unit 12, the coordinates on the xy plane of the core gripping device 1 are matched, and the core gripping device is placed on the baseboard unit 24. 1 is arranged. At this time, the pickers 13a and 13b are arranged on the holes 26a and 26b formed in the base plate 24, respectively.

  Next, the support unit 10 of the core holding device 1 is moved downward (z-axis minus direction) using the drive unit 12. Thereby, each picker 13a, 13b descends, and as shown in FIG. 5B, the gripping portions 14a, 14b of the pickers 13a, 13b are placed inside the respective hole portions 26a, 26b formed in the baseboard portion 24. Each inserted.

  Next, as shown to FIG. 5C, the holding parts 14a and 14b inserted in each hole 26a and 26b of the baseboard part 24 are expanded, respectively. Thereby, each holding | grip part 14a, 14b each contact | abuts to the inner wall (side wall) of hole 26a, 26b of the baseboard part 24, and the pickers 13a, 13b are fixed to the baseboard part 24.

  After that, as shown in FIG. 5D, the picker 13a, 13b moves the support unit 10 of the core gripping device 1 in the upward direction (z-axis plus direction) using the drive unit 12 with the base plate part 24 gripped. Let Thereby, each picker 13a, 13b rises and the core 20 (baseboard part 24) is lifted.

  Next, as shown in FIG. 5E, the core gripping device 1 is moved to the place where the mold 32 is arranged in a state where the core gripping device 1 is gripping the core 20 (the baseboard portion 24). To do. Here, there is a molten metal in which aluminum is melted at the lower part of the mold 32, and the mold 32 also stores heat, so that heat is radiated from the mold 32 to the air. In particular, the concave portion 33 of the mold 32 in which the base plate portion 24 of the core 20 is stored is at a high temperature. When the base plate portion 24 of the core 20 is stored in the concave portion 33 of the mold 32 in this state, the gripping portion 14a and 14b are deteriorated by the influence of heat. In other words, since the elastic members (rubber and the like) constituting the gripping portions 14a and 14b are vulnerable to heat, when the temperature of the mold 32 for storing the core 20 is high, when the core 20 is stored in the mold 32, There is a problem that heat is transmitted from the mold 32 to the gripping portions 14a and 14b, and the gripping portions 14a and 14b are deteriorated by the heat.

  Therefore, in the present embodiment, as shown in FIG. 5F, gas is sprayed from the nozzles 15a and 15b provided on the front end sides of the gripping portions 14a and 14b, and the mold 32 is blown to the mold 32. While cooling, the support unit 10 of the core gripping device 1 is moved downward (z-axis minus direction) using the drive unit 12. In this way, since the heat is diffused by blowing the gas to the mold 32 and the mold 32 is cooled, the baseboard portion 24 can be stored in the recessed portion 33 of the mold 32 in a cooled state (FIG. See 5G).

  And after the baseboard part 24 is stored in the metal mold | die 32 as shown to FIG. 5G, the holding parts 14a and 14b of each picker 13a and 13b are shrunk | retracted, and each picker 13a and 13b is raised. Thereby, each picker 13a, 13b is extracted from each hole 26a, 26b of the baseboard 24.

  By the operation | movement demonstrated above, the core 20 (baseboard part 24) currently placed on the mounting base 31 can be stored in the metal mold | die 32 (refer FIG. 5G) using the core holding | grip apparatus 1. FIG.

  In the description of FIG. 5F described above, the case has been described in which the core 20 (the baseboard portion 24) is moved downward while gas is ejected from the nozzles 15a and 15b. However, in the core gripping device 1 according to the present embodiment, after the gas is sprayed from the nozzles 15a and 15b, the gas is blown onto the mold 32 and the mold 32 is cooled, the baseboard 24 is moved downward. Then, the baseboard 24 may be stored in the mold 32. At this time, for example, a temperature sensor is provided in the mold 32, and after the temperature measured by the temperature sensor becomes lower than a predetermined temperature (for example, the temperature measured by the temperature sensor suppresses the deterioration of the gripping portions 14a and 14b. After the temperature becomes lower than the temperature that can be obtained, the skirting board portion 24 may be moved downward to fit the skirting board portion 24 in the mold 32.

  Further, in the core gripping device 1 according to the present embodiment, a temperature sensor is provided in the mold 32, and the baseboard portion 24 is moved downward while monitoring the temperature of the mold 32 with this temperature sensor. Also good. Specifically, the temperature of the mold 32 is monitored using a temperature sensor while gas is sprayed from the nozzles 15a and 15b, and the mold 32 is blown to cool the mold 32. And when the cooling speed of the metal mold | die 32 is quick, the moving speed to the downward direction of the baseboard part 24 is made according to it. On the contrary, when the cooling rate of the mold 32 is slow, the moving speed in the downward direction of the baseboard portion 24 is slowed accordingly.

  As described above, in the core holding device 1 according to the present embodiment, when the core 20 (the baseboard portion 24) is placed in the mold 32, gas is blown from the nozzles 15a and 15b to mold the mold 32. Is cooling. Therefore, since heat can be suppressed from being transferred from the mold 32 to the gripping portions 14a and 14b when the core 20 (baseboard portion 24) is placed in the mold 32, the gripping portions 14a and 14b are deteriorated by heat. Can be suppressed.

  Therefore, the invention according to the present embodiment can provide a core gripping device that can suppress deterioration of the gripping portion that grips the core.

  In addition, although the case where the shape of the hole part formed in the baseboard part of a core was made into the column shape was demonstrated above as an example, in the invention concerning this Embodiment, the shape of a hole part is limited to a column shape. There is nothing.

  Although the present invention has been described with reference to the above embodiment, the present invention is not limited only to the configuration of the above embodiment, and within the scope of the invention of the claims of the present application. It goes without saying that various modifications, corrections, and combinations that can be made by those skilled in the art are included.

DESCRIPTION OF SYMBOLS 1 Core holding | grip apparatus 10 Support part 11 Control part 12 Drive part 13a, 13b Picker 14a, 14b Grasping part 15a, 15b Nozzle 16, 17, 18 Pipe 20 Core 21 Core main-body part 22a-22c Type 24, 25 Baseboard Portions 26a, 26b, 27a, 27b Hole 31 Mounting table 32 Mold 33 Recess

Claims (1)

A core gripping device for gripping the core,
The core gripping device includes a gripping portion that can be expanded and contracted using a fluid, and grips the core by inserting the gripping portion from a vertical direction into a hole formed in the core and expanding the gripping portion. Have a picker
On the tip side of the gripping part, a nozzle for cooling a mold for blowing the gas and storing the core is provided.
Core gripping device.

Images