JPS6064737A - Twist forming machine for vane - Google Patents

Abstract

PURPOSE:To perform twist forming and automatic correction of a vane with high quality by providing means for gripping a vane with a gripper, twisting the vane, measuring the angle thereof, correcting and calculating the angle so as to maintain said angle within prescribed tolerance and repeating forming. CONSTITUTION:A gripper 7 is inserted to the outside circumferential surface of a work 9 from the side face thereof to grip a vane 10. The gripper 7 is rotated at a prescribed angle around the axial center thereof to form a twisted part in the vane part between a disc part 11 and the vane 10 gripped by the gripper 7. The attack angle of the vane 10 is measured by a television camera 5 after forming. More specifically, the end face of the outside circumferential part is iamged by the television monitor of a control panel 8. The video is calculated and measured with a microcomputer to measure the attack angle of the vane after the twist formation without contact. the measured angle is compared with the required attack angle and if the measured angle is off the tolerance, the correction angle is calculated and the correcting formation of the twist and the measurement of the angle are repeated until the required angle is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a blade twist forming machine for forming a slitted disc-shaped deaf member into a blade having a predetermined angle of attack. It is suitable for forming the blades of pumps.

[Background of the invention]

The blade twisting and forming machine disclosed in Japanese Patent Application No. 58-37359 adds a pre-known springback angle to the angle of attack in order to make the blade a predetermined angle of attack. The blade is rotated and twisted, and the actual angle of attack of the blade is measured after twisting.

However, the amount of springback varies depending on the material and shape at that time, and there is also fluctuation. For this reason, the angle of attack may not be within the specified tolerance when measured, and manual twist correction is required.

[Purpose of the invention]

The purpose of the present invention is to twist-form a blade, measure its angle, determine whether the angle is within a predetermined tolerance, and if it is not, carry out twist-forming and inspection for correction. It is an object of the present invention to provide a blade twisting forming machine that can repeat U and automatically correct it so that it falls within a predetermined tolerance.

[Summary of the invention]

Generally, when a metal material is twisted and formed, a spring bank is created due to the elasticity of the material. Therefore, even if the grip is rotated by pushing the blade to a predetermined angle of attack, the actual angle of attack of the blade after the grip is released will be several degrees or more smaller than the predetermined angle of attack. This spring bank rat differs depending on the material and size and shape, and even a small spring bank rat will have a flutter of about 2 to 4 degrees. Therefore, in order to obtain a blade having an angle of attack within a predetermined tolerance, the present invention repeats twist forming and measurement until the angle of attack falls within the tolerance, and automatically performs twist correction forming.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

Reference numeral 1 denotes a rotary table on which a workpiece 9 such as a blade is attached for indexing in the circumferential direction. It is equipped with blades 10, and in FIG. 1 there are three stages. The minister is the outer periphery.

Numeral 7 is a pair of grips, such as pliers, which are designed to hold and twist one of the blades 10, and are attached to the mounting base 4 so that they can rotate around their axis. l
The blade 10 can be inserted into the blade 10 through a gap that is slightly larger than the thickness of the blade 10 without opening or closing. The handle table 4 is mounted on an X column 3 attached to the X column 2 so as to move vertically in the direction of the arrow Y, and is horizontally movable in the direction of the arrow X. 70 gripping positions are indexed.

Reference numeral 5 designates an all-solid-state television camera mounted on the X column 3 for performing image processing such as measuring the dimensions and angles of the blade 1O after the twist forming process, and 6 designates an illumination lamp for photographing by the television camera 5.

8 is a control panel that controls the operation of each of the above components.

It has a built-in microcomputer that controls various operations such as blade lO indexing, twist forming, and inspection using software programs. Additionally, a monitor for displaying images taken by the television camera 5 and a printer for recording inspection results are also installed.

When processing, use feathers! 0 single-stage or multi-stage workpiece 9 with its axis line
It is mounted on the rotary table 1 with a chuck so that it is perpendicular to the movement in the direction of arrow Y and parallel to the movement of the X column 2 in the direction of arrow Y. In this case, items that are split in half, such as the stator vanes of a turbomolecular pump, or items that can only be attached using a chuck, are attached using a jig. Indexing of the blades 10 in the circumferential direction is performed by a rotary table l, and vertical movement by the X column 2 indexes the position in the direction of the number of stages, and horizontal movement by the X column 3 performs indexing of the scissoring position of the blade 10 in the radial direction.

Then, as shown in FIGS. 2 and 3, the gripper 7 is inserted from the side surface of the outer circumferential portion 12 using, for example, pliers to grip the blade IO. That much U is the disk part 1
This is the range from the point (several mm) beyond the blade of the blade IO to the outer peripheral portion 12. When the gripper 7 is rotated to a predetermined angle around its axis, the gap between the disc portion 11 and the blade lO sandwiched between the gripper 7, that is, the portion of the blade not sandwiched between the gripper 7 Plastic deformation occurs due to twisting, and a twisted portion 14 is formed.

Now, the troublesome problem here is the spring bank that occurs during twist forming. When the blade lO is grabbed and the grip 7 is rotated to a certain angle, and the grip 7 releases the blade lO and the mount 4 is retreated in the X direction, the actual angle of attack 15 of the blade lO is the rotation angle of the grip 7. It will be several degrees lower than that. This is because a spring bag is generated due to the elasticity of the material, and the amount varies depending on the material, size, shape, etc.

There is also a variation of about 2 to 4 degrees. For this reason, the above-mentioned Kakamiko 7
The predetermined angle to rotate is the required angle of attack 15 for one blade 10.
It is necessary to add the springback angle of the step. Therefore, the movement of the gripper 7 is also made to match the behavior of this spring bank. In other words, after rotating the gripper 7 at a predetermined angle, open the gripper 7, then push the gripper 7 backwards until the actual angle of attack of the blade 10 is 5, and move the mounting base 4 to the X column 3. Then, reverse the grip 7 and return it to the original position 1 it (the gap between the grip 7 is parallel to the disc part 11 and the blade 10 before twist forming).
Return to By repeating such indexing and twisting of the blade 10, one stage of the blade 10 can be torsionally plastically formed.

After the above-mentioned twist forming, the angle of attack 15 of the blade IO is measured using a measuring device consisting of an all-solid-state television camera 5. first,
As shown in FIG. 4, the blade lO is moved with the rotary table 1 and the X and X columns 3 and 2 to a position U that can be photographed by the television camera 5, and the outer peripheral end surface is visualized on the television monitor of the control panel 8. This image is divided, for example, into pixels, like the eyes of the board, and it is determined whether or not there is an image of the end face of the blade 10, and the microcomputer in the control panel 8 performs calculations and measurements. Thereby, measurement of the angle of attack 15 and other dimensions of the blade IO after twist forming can be performed in a non-contact manner.

Furthermore, the microcomputer in the control panel 8 compares the measured angle with the separately input required angle of attack, and if the measured angle is outside the specified tolerance, calculates a correction angle until the required angle of attack is achieved. Repeat molding and inspection to correct twisting. The positioning procedure at this time is the same as for molding, except that since the blades already have a certain angle before positioning in the X direction, the grip 7 is rotated to the measured angle each time. Further, even if the blades 10 are made in the same month and have the same shape, the amount of spring bank varies depending on the material actually used at that time and the accuracy of the machined dimensions and shape. For this reason, based on prior M approval and experience, the necessary blade 10 is inputted as the inspection angle to the spring bank angle that was previously input into the microcomputer of the control panel 8.
The angle of attack 15 is compared and calculated, and the input data of the spring puncture angle is automatically corrected using the feed bank.

For example, if this input data is corrected by twisting and measuring the first blade 10 for each stage, the remaining blades 1
0, the sand in the vane 10 requiring torsion autocorrection can be greatly reduced.

In addition, before twisting, when the grip 7 moves in the direction of arrow X to grip the blade 10, it can also be confirmed with this television inspection device that collision with the grip 7 is prevented due to deformation of the blade 1O.

Collision prevention, twist forming, inspection, twist correction forming, and inspection records described above 1. A series of controls such as automatic correction of input data are performed by a software program of a microcomputer built into the control panel 8, and the order of the controls can be set in any manner using this software program.

According to the above embodiment, the blade 10 can be twisted and formed from a slit disc shape for both single-stage and multi-stage blades, and by being equipped with an all-solid-state TV inspection device, angular dimension measurement and its measurement can be performed. It is possible to perform recording, automatic twist correction molding, and automatic correction of input data, and has the effect of enabling blade torsion molding processing that can be performed with relatively inexpensive equipment, high quality, and with a small number of processing steps.

〔Effect of the invention〕

According to the present invention, there is an effect that stable, high-quality blade torsion forming processing and automatic correction thereof can be performed with a small number of processing steps.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of the blade twist forming machine according to the present invention, Fig. 2 is a plan view showing the situation during twist forming, Fig. 3 is a side view of Fig. 2, and Fig. 4 is a side view of Fig. 2. FIG. 5 is a side view showing the inspection condition of the twist-formed blade, and FIG. 5 is a parent view of B in FIG. 4. l... Rotating table, 2... Y column, 3 ・X column, 4... Mounting stand, 5... TV camera, 6... Lighting lamp, 7...・・・・・・
Grip, 8... Control panel, 9... Workpiece, 1
0...Blade, 11...Disc part, school...
...outer periphery, 13...slit, 14...
・Twisted part, 15... Angle of attack: 2

Claims (1)

[Claims] 1. A processing machine that twists and forms blades having a predetermined angle from a disk-shaped workpiece with slits formed therein, which is equipped with a rotary table that indexes the workpiece in the circumferential direction. The gripper that grips the blade of the workpiece is configured to be rotatable around its axis, and a means is provided to position the gripper by moving the gripper and the rotary table relative to each other, making it possible to photograph the blade. A television camera is installed at the same time, and a control panel for operating the rotary table and grips is installed, and a television image processing device is installed in the control panel, and the torsion angle of the blade is calculated and measured after the blade is twisted. , the inspection angle is checked against a predetermined angle input separately, and if the inspection angle is outside the predetermined angle tolerance, the twist forming and angle inspection are repeated until the blade twist angle is within the predetermined angle tolerance, and then automatically A blade twist forming machine that is equipped with a microcomputer that can perform twist correction forming.