JPH10277875A - Position checking method between two members - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make simple the check of the position between a powder supply nozzle and a valve seat in the longitudinal, lateral and vertical directions. SOLUTION: A powder supply nozzle 16 is furnished with the first passage 31 penetrating in the powder supplying direction and the second passage 32 branching from the first passage 31 and leading to a powder supply source. A measuring bar 34 as a jig is inserted through the first passage 31 and is equipped with graduations 34a to serve as creterion for judging the position over the height. In the condition that the measuring bar 34 is inserted through the first passage 31 is in contact with a valve seat 33, position checking between the nozzle 16 and valve seat 33 in the direction over the height is conducted from the positional relationship between the graduations 34a and the nozzle foremost face 16a. Also from the contacting position of the bar 34 with the valve seat 33, position checking between the nozzle 16 and valve seat 33 is made in the directions fore and aft and to the left and right.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for easily adjusting the position of a supply nozzle for supplying a fluid containing gas, liquid, powder, or the like to a predetermined position.

[0002]

2. Description of the Related Art When considering the relationship between two members that repeat a specific separating and approaching operation by automatic driving, for example, the relationship between a machine tool and a workpiece, it is necessary to precisely adjust the position at the time of approaching in order to increase work accuracy. Is very important. Therefore, it is desirable that the inspection of the positional relationship be performed every time the operation is started. In addition, it is desirable that the inspection can be performed immediately even when some abnormality occurs. Meanwhile, in inspecting the positional relationship between two members, as a conventional visual technique, a method of obtaining a difference between a design dimension and an actual measured value, a method of using a sight, and the like can be cited. Further, in order to automatically measure a positional relationship between two members, a method of equipping a machine tool or the like with a position sensor, a processing device, and the like is also common. As a conventional example of a visual inspection method, details are disclosed in Japanese Patent Application Laid-Open No. 58-65553. As an example of automatic measurement,
The details are disclosed in, for example, JP-A-6-12482.

[0003]

However, each of the above-mentioned conventional examples has the following problems. First, among the visual inspection methods, the method of obtaining the difference between the design dimension and the actual measurement value is difficult to measure in some places, or the measurement error easily affects the inspection accuracy, and is not a sufficiently satisfactory method. Was. In addition, when the sight is used, it is possible to confirm the position in the front-rear and left-right directions, but it is not possible to confirm the position in the height direction, and it is necessary to confirm the height by another method. Further, the method of performing automatic measurement can obtain a highly reliable inspection result, but requires a measuring device, which results in an increase in size and cost as a whole.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to confirm the position between two members in the front-rear, left-right, and height directions without providing a complicated measuring device. It can be easily done. Then, the inspection frequency is increased to maintain the work accuracy.

[0005]

Means for solving the above-mentioned problem according to the present invention is to repeat a specific separating and approaching operation.
A method of checking the position of two members when approaching,
A passage penetrating in a direction in which the position of the first member and the second member is to be confirmed is formed in a portion where the position of the first member is closest to the second member, and a jig provided with a height scale in the passage is inserted into the passage. First, the positional relationship between the height scale of the tool and the end surface of the closest part of the first member,
The height between the second members is checked at the contact position between the jig and the second member, and the position between the first and second members is checked.

According to the present invention, a jig provided with a height scale is inserted into a passage formed in the first member, and the jig is brought into contact with the second member, whereby the first and second members are brought into contact. The height check and the position check between members are performed simultaneously.

According to another aspect of the present invention, there is provided a method for confirming the position of a supply nozzle which solves the above-mentioned problem. And a second passage branched from the first passage and communicating with the supply source of the fluid, and a jig provided with a height scale is inserted into the first passage to perform the treatment. The height check between the nozzle and the supply target is performed based on the positional relationship between the tool height scale and the nozzle tip surface, and the position check between the nozzle and the supply target is performed at the contact position between the jig and the supply target. , Respectively.

According to the present invention, a first passage penetrating in the fluid supply direction is provided at the tip of the nozzle, and a jig provided with a height scale is inserted into the first passage so that the nozzle is covered with the first passage. The height check and the position check with the supply are performed at the same time.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, a description will be given by exemplifying a relationship between a fluid supply valve and a material to be supplied as two members that repeat a specific separation approach operation. More specifically, a description will be given by exemplifying a powder supply device of a laser clad processing device.

FIG. 4 shows a powder supply apparatus for a laser clad processing apparatus. By the way, a laser clad processing apparatus supplies, for example, a powder of a copper-based material or the like having excellent heat resistance and durability to the surface of a valve seat portion of a cylinder head, and irradiates the powder with a laser beam. The powder is deposited on the surface of the valve seat. In order to improve the quality of the product by the laser clad processing apparatus, it is necessary to control the supply amount of the powder with high accuracy by using a powder supply apparatus as shown in FIG.

The illustrated powder supply device has a powder flow passage for supplying powder to a powder supply device 7 as powder supply means. This powder flow passage is formed by connecting an auxiliary valve 9 and a powder supply valve 10 in series below the main hopper 8 and further connecting the sub-hopper 12 of the powder supply device 7 with a sub-hopper cover 11. is there. The main hopper 8, the auxiliary valve 9, and the powder supply valve 10 are all fixed to the main frame 13. The powder feeder 7 is fixed to the main frame 13 via the position adjusting means 14, and is in the X-axis direction (the left-right direction in FIG. 4) and the Y-axis direction (the direction perpendicular to the plane of FIG. 4).
Can be adjusted. Also the mainframe
13 has a height adjusting means 15, which can adjust the position of the entire apparatus in the Z-axis direction (vertical direction in FIG. 4). Thus, by providing the position adjusting means 14 and the height adjusting means 15 separately, even if the height adjusting means 15 is moved to change the supply height of the powder, the sub hopper cover 11 and the sub hopper 12 , The positional relationship between them is constant, and the labor for adjustment work is reduced. The main hopper 8 is connected to a supply pipe 30 for supplying a purge gas.

Here, the powder feeder 7 will be described in detail.
In the powder feeder, a sub hopper 12 and a fixed-quantity feeder 4 are fixed to a bracket 2, and the bracket 2 is supported by a mass measuring device 1 such as a load cell. Mass measuring device 1
Are supported by the position adjusting means 14. The sub-hopper 12 and the metering device 4 are connected by a communication pipe 5. The sub hopper 12 has a powder capacity larger than a necessary supply amount in one processing step. Here, the “supply amount required in one processing step” refers to, for example, in the case where the powder supply apparatus is used for the laser cladding processing apparatus as described above, for example, a valve seat portion (a plurality of cylinder seat portions) of one cylinder head. Means the amount capable of supplying the powder to all of the above. Naturally, the required supply amount in one processing step differs depending on the configuration of the line on which the apparatus is installed and the workpiece.

The powder supply device 7 can supply the powder stored in the sub hopper 12 to the outside from the powder supply nozzle 16 while weighing the powder by the quantitative supply device 4. The powder supply nozzle 16 has a first passage 31 penetrating in the powder supply direction,
It has a second passage 32 that branches off from the first passage 31 and communicates with the quantitative supply device 4 that is a powder supply source. The powder supply nozzle 16 is fixed to a cover of the powder supply device 7.
The mass measuring device 1 measures the total mass of the sub hopper 12, the fixed amount feeder 4, the communication pipe 5, and the powder P. And
A change in mass per unit time is calculated by a powder feeder control device (not shown). By the way, the mass decrease measured by the mass measuring device 1 during powder supply is equal to the mass of the powder supplied from the nozzle 6. Therefore, it is possible to accurately grasp the current powder supply amount, and to control the powder supply amount with high accuracy by controlling the quantitative supply device 4 based on the calculated powder supply amount. be able to.

Next, the powder flow path will be described. Main hopper 8 as a component of the powder flow passage
Has a powder capacity equal to or greater than the required supply amount over the entire process.
The auxiliary valve 9 is for stopping the supply of powder from the main hopper 8 to the powder supply device 7 when performing maintenance or the like, and can be manually opened and closed.

As shown in FIGS. 5 and 6, the powder supply valve 10 has a cylindrical valve body 19 at a position crossing a flow passage 18 provided in a main body 17. Between the main body 17 and the valve body 19,
A dimensional difference for rotatably supporting the valve body 19 is provided. The valve element 19 is supported by a bearing 20 as a support means. The bearing 20 is a sliding bearing in which a sliding surface with the valve element 19 is subjected to Teflon processing or the like. Further, a through hole 21 is formed in the valve body 19, and the valve body 19 is rotated so that the through hole 21 and the flow passage are formed.
18 and the powder supply valve 10
Is opened. In addition, an actuator 22 (FIG. 4) for rotating the valve body 19 to open and close the powder supply valve 10 is provided. Therefore, the powder supply valve 10 is automatically opened and closed by controlling the actuator 22 by a facility control device (not shown).

Further, the main body 17 of the powder supply valve 10 includes:
A reservoir 23 is provided between the flow passage 18 and the bearing 20. The storage section 23 is provided in an annular shape so as to surround the valve element 19. Therefore, the flow passage 18 is provided in the gap between the main body 17 and the valve body 19.
Even if the powder enters, the powder is collected in the storage portion 23 and does not reach the bearing 20, so that the bearing 20 can be prevented from being damaged. Further, a powder discharge path 24 is provided in the storage unit 23, and the powder collected in the storage unit 23 can be collected without disassembling the powder supply valve 10.

The powder supply device having the above-described configuration stores a fixed amount of powder in the sub-hopper 12 of the powder supply device 7, and supplies the powder from the powder supply nozzle 16 while weighing the powder with the fixed-quantity supply device 4. I do. The amount of powder in the sub hopper 12 is detected by the mass measuring device 1. When the amount falls below a certain amount, the powder supply valve 10 is opened and the powder is supplied from the main hopper 8 to the sub hopper 12 at a timing when the powder supply in the powder supply device 7 is not performed.

Now, in order to improve the quality of the product by the laser clad processing device, the powder supply amount is controlled with high precision by the powder supply device, and the powder supply position is accurately adjusted to a desired position. It is necessary to match. Therefore, in the powder supply device according to the embodiment of the present invention, the position between the powder supply nozzle 16 and the valve seat portion 33 is confirmed by the method shown in FIG. As described above, the powder supply nozzle 16 has the first passage 31 penetrating in the powder supply direction (in this case, the direction in which gravity acts), and branches off from the first passage 31 to supply the powder at the powder supply source. A second passageway 32 communicating with a certain metering device 4; Then, a measuring rod 34 as a jig is inserted into the first passage 31. The measuring rod 34 is provided with a scale 34a as a reference for determining a position in the height direction (Z-axis direction). As shown in FIG. 1, the measuring rod 34 inserted into the first passage 31 is
In the state of contact with the nozzle, the positional relationship between the scale 34a of the measuring rod 34 and the nozzle tip surface 16a is visually observed.

As shown in FIG. 2A, when the scale 34a is positioned so as to extend over the nozzle tip surface 16a, the positional relationship between the powder supply nozzle 16 and the valve seat 33 in the Z-axis direction. Is determined to be appropriate. (Therefore, measuring rod 34
The position where the scale 34a is provided depends on the appropriate height between the powder supply nozzle 16 and the valve seat portion 33. Also, as shown in FIG. 2 (b), the X of the powder supply nozzle 16 and the valve seat 33 is determined from the contact position of the measuring rod 34 against the valve seat 33.
The positional relationship between the axial direction and the Y-axis direction is determined as good or bad. Then, based on the result, the position adjusting means 14 and the height adjusting means 15
(See FIG. 4) are adjusted respectively, and the supply position of the powder is accurately adjusted to a desired position. And, as shown in FIG.
By feeding the powder P into the second passage 32, the powder P passes through the first passage 31 and is accurately supplied to the valve seat 33.

That is, the supply nozzle position confirmation means penetrates the tip end of the powder supply nozzle 16 which repeats a specific separating and approaching operation with respect to the valve seat portion 33 which is the supply object in the powder supply direction. A first passage 31 and a second passage branched from the first passage 31 and communicating with the quantitative supply device 4 serving as a powder supply source.
A passage 32 is provided, and a measuring rod 34 which can be inserted into the first passage 31 and can be brought into contact with the valve seat portion 33 which is a supply surface at the time of insertion and has a height scale 34a is provided. Is what you do.

The operation and effect obtained by the embodiment of the present invention having the above configuration are as follows. The powder supply nozzle 16 has a first passage 31 penetrating in the powder supply direction, a second passage 32 branched from the first passage 31 and communicating with the fixed amount supply device 4 that is a powder supply source. And the first passage 31 is used for confirming the position between the powder supply nozzle 16 and the valve seat 33. At the time of the checking operation, the measuring rod 34 is inserted into the first passage 31, and the quality in the Z-axis direction is visually judged from the positional relationship between the scale 34a and the nozzle tip surface 16a. Further, based on the contact position of the measuring rod 34 with the valve seat portion 33, the quality of the positional relationship between the powder supply nozzle 16 and the valve seat portion 33 in the X-axis direction and the Y-axis direction is determined. It is possible to simultaneously confirm the positional relationship in the X, Y, and Z axis directions. Moreover,
Since the measuring rod 34 is directly inserted into the first passage 31 serving as the powder supply port, the positional relationship can be accurately confirmed.

Further, all that is required of the operator during the checking operation is to insert the measuring rod 34 into the first passage 31 with the powder supply nozzle 16 approaching the valve seat portion 33. Positioning is very easy. Therefore,
The inspection frequency can be increased, and the supply position of the powder can always be adjusted to a desired position. In addition, even when any abnormality occurs, the inspection can be performed promptly, and the cause can be investigated at an early stage.

The present invention is not limited to the powder supply apparatus described in the embodiment, but can be used for positioning of supply nozzles for various fluids such as liquid and gas. When used for a liquid or gas supply nozzle, the fluid is supplied from the second passage 32 to the first passage 31 by closing the upper end opening of the first passage 31 with a cap or the like during the supply of the fluid (other than at the time of inspection).
The guide can be smoothly guided to the lower end opening of the passage 31.

Further, the present invention is not limited to the relationship between the nozzle and the workpiece, and can easily confirm the position between two members that repeat a specific separation and approach operation, such as the relationship between a machine tool and the workpiece. Is made possible. In this case, when confirming the positional relationship between the machine tool (first member) and the workpiece (second member) at the time of approach, the part of the machine tool closest to the workpiece is referred to as the workpiece. Is formed in the direction in which the position is to be confirmed, and a jig (measurement rod 34) is inserted into the passage to bring the jig into contact with the workpiece.
According to this method, the first and the second are performed in the same manner as in the above embodiment.
The height check and the position check between members can be performed simultaneously.

[0025]

According to the present invention, the following effects are obtained. According to the position confirmation method according to the first aspect of the present invention, since the height confirmation and the position confirmation between the first and second members can be performed simultaneously and easily without providing a large-scale measuring device, the inspection is performed. It is possible to increase the frequency and maintain the work accuracy.

According to the position confirmation method according to the second aspect of the present invention, a large-scale measuring device is provided for simultaneously confirming the height and the position of the nozzle for supplying the fluid and the material to be supplied. Since the inspection can be easily performed without any trouble, it is possible to increase the inspection frequency and maintain the work accuracy. Therefore, it is possible to always maintain the supply accuracy of the fluid with high accuracy.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing the relationship between a powder supply nozzle, an inspection jig, and a powder supply surface of a powder supply device according to an embodiment of the present invention.

2A and 2B are diagrams showing a state where the position of a powder supply nozzle shown in FIG. 1 is confirmed, and FIG. 2A shows a position confirmation in a height direction;
(B) is a schematic diagram when confirming the position in the front-back, left-right direction.

FIG. 3 is a schematic sectional view showing a state of the powder supply nozzle shown in FIG. 1 during powder supply.

FIG. 4 is a schematic sectional view showing a powder supply device provided with the powder supply nozzle shown in FIG.

FIG. 5 is a sectional view of a main part of the powder flow valve shown in FIG.

6 is a sectional view of the powder flow valve shown in FIG. 5,
5A is a cross-sectional view taken along line AA in FIG. 5, and FIG.
2 shows a cross section taken along line BB of FIG.

[Explanation of symbols]

 16 Powder supply nozzle 31 First passage 32 Second passage 33 Valve seat part 34 Measurement rod 34a Scale

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hideyuki Hozoji 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation (72) Inventor Akio Sato 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation (72) Inventor Koji Shoda 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation

Claims (2)

[Claims] 1. A method for confirming a position of an approach between two members that repeat a specific separating and approaching operation, wherein a position of a first member closest to the second member is located at a position closest to the second member. Is formed, and a jig provided with a height scale is inserted into the path, and a positional relationship between the height scale of the jig and the end surface of the closest member of the first member is obtained. A position confirmation method comprising: confirming a height between the first and second members; and confirming a position between the first and second members at a contact position between the jig and the second member, respectively. 2. A first passage penetrating in a fluid supply direction at a tip end of a nozzle that repeats a specific separating and approaching operation with respect to a material to be supplied, and a supply source of the fluid branched from the first passage. And a second passage communicating with the nozzle, the jig provided with a height scale is inserted into the first passage, and the nozzle and the supply target are placed in a positional relationship between the height scale of the jig and the nozzle tip surface. A method of confirming a position of a supply nozzle, comprising: confirming a height of an object, and confirming a position of a nozzle and an object to be supplied at a contact position between the jig and the object to be supplied.