JP2000107853A - Apparatus for removing remaining sand on casting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely remove remaining sand left in the inner part of a casting with a mechanical work automatically executed as an on-line work. SOLUTION: This apparatus is composed of a nozzle 5 for jetting shots, a shot supplying system for supplying the shots with compressed air, a nozzle driving unit U three-dimensionally driving the nozzle, a positioning means, a holding means and a control means. In the shot supplying system, a shot hopper for supplying the shots into a supplying piping through the compressed air supplying source and a valve, is arranged, and in the nozzle driving unit U, actuators are independently arranged in each axis of Z axis, Y axis and X axis as coordinate axes. In the positioning means, a cylinder device 17 for positioning pushing the casting toward two reference surfaces along the Z axis and the X axis, and in the holding means, a cylinder device 18 for holding the casting at the interval with a stopper, is arranged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for removing residual sand adhering to the interior of a casting by shot injection in a casting line for producing a casting, and more particularly to a device for removing residual sand from a casting.

[0002]

2. Description of the Related Art In a conventional casting line, surplus parts such as burrs and agar that remain in a casting are removed by external surface treatment, shot blasting is performed on the outer surface of the casting by surface treatment, and after an inspection process and a final finish, The sand remaining in the castings was removed manually and shipped off-line.

[0003] The work for removing residual sand from castings is generally carried out by shot blasting on the outer surface. However, when the inner shape is complicated, it cannot be completely removed. Work such as application of a high voltage is performed by manual operation as needed to remove core sand remaining in the casting.

[0004]

In the above-mentioned conventional construction, the removal of residual sand is not preferable because it has a bad influence on the cast product in any method. In addition, since the work is performed by human judgment, it cannot be performed as an online work, which is a problem in production management.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide an apparatus for removing residual sand from a casting, which can surely remove residual sand remaining inside the casting by a mechanical operation automatically performed as an online operation. And

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, a device for removing residual sand from a casting according to the present invention comprises a nozzle for injecting a shot into a hole opening on the outer surface of the casting, and a compression of the shot to the nozzle. A shot supply system supplied by air, a nozzle drive unit for driving a nozzle to an arbitrary three-dimensional position, positioning means for positioning a casting at a fixed position on an installation surface, and holding means for fixing and holding the casting at a fixed position And a control means, the shot supply system includes a compressed air supply source that supplies compressed air to the nozzle via a supply pipe, and a shot supply hopper that supplies shots to the supply pipe via a valve. The nozzle drive unit has a Z axis along the axial direction of the nozzle, a Y axis along the vertical direction, and an X axis orthogonal to the Z axis and the Y axis as coordinate axes, and an independent actuator for each axis. The positioning means has a stopper having two reference planes along the Z axis and the X axis, and a positioning cylinder device for pressing the casting toward the two reference planes, and the holding means, A holding cylinder device for holding the casting abutting on the two reference surfaces between the stopper and the stopper, the control means includes a shot supply system valve,
It controls the driving of each actuator, positioning cylinder device, and holding cylinder device of the nozzle drive unit.

With the above arrangement, the positioning cylinder device is driven to press the casting against the reference surface in a state where the casting is disposed at a position facing the stopper on the installation surface, and the casting is pressed against both reference surfaces. Position. The holding cylinder device is driven, and the casting is held and fixedly held between the stopper and the stopper.

In this state, each actuator of the nozzle drive unit is driven, and the nozzle is arranged at a position facing the hole opening on the outer surface of the casting. The position of the hole of the casting is set and registered in advance in the control means.

On the outward path in which the nozzle is moved in the Z-axis direction to approach the opposing hole, the valve of the shot supply system is opened by supplying compressed air from the compressed air supply source to the nozzle through the supply pipe. The shot is sent out to the supply line, and the shot is injected from the nozzle together with the compressed air.
The shot is sprayed into the hole and shot blasted to remove residual sand such as core sand remaining in the hole.

On the return path in which the nozzle is moved in the Z-axis direction and separated from the opposing hole, the shot supply system valve is closed to stop the supply of the shot, and only the compressed air is injected from the nozzle to discharge the compressed air. It is injected into the hole and air blows to remove shots and residual sand remaining in the hole.

Next, the nozzle is moved in the Y-axis direction to dispose the nozzle in the other hole so as to face the other hole, and the above operation is performed. Perform air blow.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1 to FIG. 4, a conveying means 2 such as a chain conveyor for conveying a casting W from an inlet 1 a on the front side to an outlet (not shown) on the rear side is provided inside the chamber 1. Transports a pair of castings W mounted back to back on the transport jig 3 at the same time. Inside the chamber 1, a pair of processing stations ST are installed before and after along the transport trajectory of each casting W, and a total of four processing stations ST are provided.

Similar equipment is arranged in each processing station ST, but in FIG.
The configuration at T is mainly disclosed, and the configuration of an adjacent processing station ST is partially disclosed.

In each processing station ST, a nozzle 5 is disposed while being held at the tip of a lance 4 of a nozzle driving unit U. The nozzle 5 is shot (a) through a plurality of holes a opening on the outer surface of the casting W. (Micro steel bodies).

As shown in FIG. 2, a shot supply system 7 is connected to the nozzle 5 via a flexible tube 6. The shot supply system 7 supplies a shot to the supply pipe 8 having a flow meter 8 a, a compressed air supply source 9 for supplying compressed air via the supply pipe 8, and a supply pipe 8 via a valve 10. And a shot supply hopper 11 for supplying a shot to the nozzle 5 with compressed air.

The nozzle drive unit U includes a Z-axis table 13 having an actuator for driving the table 12 holding the lance 4 in the Z-axis direction along the axial direction of the nozzle 5.
And a Y-axis table 14 having an actuator for driving the Z-axis table 13 in the Y-axis direction along the vertical direction, and an actuator for driving the Y-axis table 14 in the X-axis direction orthogonal to the Z-axis and the Y-axis. The nozzle 5 is driven to an arbitrary position in a three-dimensional area having the X-axis, Y-axis, and Z-axis as coordinate axes.

The positioning means provided at each processing station ST is for positioning the casting W at a fixed position on the installation surface of the positioning jig 3 and includes a stopper 16 and a stopper 1.
6, two reference planes 16 along the Z axis and the X axis
a, and a positioning cylinder device 17 for pressing the casting W toward 16a. The holding means provided at each processing station ST includes two reference surfaces 16, 16 of the stopper 16.
The holding cylinder device 18 holds the casting W in contact with the stopper b with the stopper 16.

Each processing station ST is provided with a seating detecting device 19 for detecting the seating of the casting W, and the seating detecting device 19 includes a probe portion 20 abutting on the upper surface of the casting W,
And a cylinder device 21 for driving the probe unit 20 up and down.

Each processing station ST has a position confirmation point 2 for confirming the reference position of the nozzle 5.
2 and a nozzle damage detection sensor 23 for checking the soundness of the nozzle 5 are provided at predetermined positions.

The above-described devices are controlled by control means (not shown), and the procedure will be described below.
A pair of castings W is arranged back to back on a transfer jig 3 outside the chamber 1, and the transfer jig 3 and the cast W are transferred to each processing station ST by the transfer means 2.

At each processing station ST, the casting W placed on the installation surface of the transport jig 3 facing the stopper 16 is driven by the positioning cylinder device 17 to move the casting surface W to the reference surface 1.
6a, 16b to position the casting W with respect to both reference surfaces 16a, 16b. Then, the holding cylinder device 18 is driven to hold the casting W between the stopper 16 and fixedly.

The cylinder device 21 of the seating detecting device 19 is driven, and the probe 20 is brought into contact with the upper surface of the casting W to confirm the presence of the casting W. In this state, the actuators of the tables 13, 14, 15 of the nozzle drive unit U are driven to position the nozzle 5 at the position confirmation point 22,
It is checked whether the tip opening of the nozzle 5 is displaced due to the distortion of the nozzle 5 or the like, and thereafter, among the holes a that open the outer surface of the casting W, the hole a to be first cleaned.
To face. The control means includes a hole a of the casting W in advance.
Is set and registered as a pattern for each model of the casting W.

Next, on the outward path in which the nozzle 5 is moved in the Z-axis direction to approach or insert the opposing hole a, the compressed air is supplied from the compressed air supply source 9 to the nozzle 5 through the supply pipe 8. , Valve 10 of shot supply system 7
Is released and the shot is sent out to the supply line 8, and the nozzle 5
The shot is injected together with the compressed air from above, and the shot is injected into the hole a to perform shot blasting, thereby removing residual sand such as core sand remaining in the hole a. At this time, the flow rate of the shot is detected by the flow meter 8a, and it is confirmed that an appropriate amount of shot is ejected. If there is an abnormality such as the shot not flowing, the operation is interrupted and a warning is issued to the worker.

At the end of the cleaning, the shot supply system 7
In the return path in which the supply of the shot is stopped by closing the valve 10 and the nozzle 5 is moved in the Z-axis direction and separated from the opposing hole, only the compressed air is injected from the nozzle 5 and the compressed air is discharged from the hole a. And air blow to remove shots and residual sand remaining inside the hole a.

Next, the control means moves the nozzle 5 in the Y-axis direction according to the procedure set and registered in advance, arranges the nozzle 5 so as to face the other hole a, and performs the above-described operation. The same operation is sequentially performed to perform shot blast and air blow on the plurality of holes a.

As shown in FIG. 3, when the shot blasting and the air blowing of the holes a arranged on one side of the casting W are performed, the work in each station ST in the preceding stage is completed.
The casting W is conveyed to the subsequent processing station ST, a new casting W is introduced into each preceding station ST, and the above-described operation is performed at each preceding station ST. Shot blasting and air blowing of the holes a 'arranged on the side are performed.

The control means positions the nozzle 5 at the nozzle breakage detection sensor 23 when the work on one casting W is completed or when the work on a predetermined number of castings W is completed. Check whether the soundness is not impaired by abrasion or the like.

[0028]

As described above, according to the present invention, the nozzle is arranged by the nozzle drive unit so as to face the hole of the casting, and the shot is blasted by injecting a shot into the hole. Air blow that can reliably remove residual sand such as core sand even in narrow holes, blast shots on the outward path, stop shots on the return path, and spray only compressed air By using the same nozzle, shot blasting and air blowing can be performed with the same nozzle, shortening the working time and simplifying the equipment configuration, and ensuring the residual sand remaining inside the casting by mechanical work that is automatically performed as online work Can be removed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an apparatus for removing residual sand from a casting according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a shot supply system in the apparatus.

FIG. 3A shows a work procedure viewed from the front, and FIG.
FIG. 4 is a schematic diagram showing a work procedure viewed from the side.

FIG. 4 is an enlarged view of a main part of the apparatus.

[Explanation of symbols]

 ST Processing station U Drive unit W Casting 1 Chamber 2 Transport means 3 Transport jig 5 Nozzle 7 Shot supply system 8 Supply pipeline 8a Flow meter 9 Compressed air supply source 10 Valve 11 Shot supply hopper 13 Z axis table 14 Y axis table 15 X-axis table 16 Stopper 16a, 16b Reference plane 17 Cylinder device for positioning 18 Cylinder device for holding 23 Nozzle breakage detection sensor

Claims (1)

[Claims] 1. A nozzle for injecting a shot into a hole opening on an outer surface of a casting, a shot supply system for supplying a shot to the nozzle with compressed air, and a nozzle drive unit for driving the nozzle to an arbitrary three-dimensional position A positioning means for positioning the casting at a fixed position on the installation surface, a holding means for fixing and holding the casting at a fixed position, and a control means.The shot supply system is configured to supply compressed air to the nozzle via a supply pipe. And a shot supply hopper for supplying a shot to a supply pipe via a valve. The nozzle drive unit includes a Z-axis along the axial direction of the nozzle, and a vertical direction. Coordinate axes are the Y axis along the X axis and the X axis orthogonal to the Z axis and the Y axis. The actuator has an independent actuator for each axis, and the positioning means has a reference plane having two reference planes along the Z axis and the X axis. And a positioning cylinder device for pressing the casting toward the two reference surfaces, and holding means for holding the casting abutting on the two reference surfaces between the stopper and the stopper. An apparatus for removing residual sand from a casting, comprising: a cylinder device; and control means for controlling driving of a shot supply system valve, each actuator of a nozzle drive unit, a positioning cylinder device, and a holding cylinder device.