JP3156747B2 - Bar material straightness correction device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention is bar - related to straightness modification equipment of wood, in particular bus, such as precision cutting shaft - with measuring the straightness of the wood, the measuring de - straightness on the basis of the data about the straightness correction equipment to fix efficiently.

[0002]

2. Description of the Related Art In general, a bar material is manufactured by cutting a material wound in a coil shape around a spool into a predetermined length and correcting the straightness. For example, in the case of a bar material for a valve spring used for an intake / exhaust valve of an automobile engine, it is required that the material has no flaws on the surface of the material, and high accuracy is required for straightness. .

Therefore, conventionally, correction has been made after measuring straightness by the following method. That is, the bar material cut to a predetermined length is placed on a pair of support stands, and a dial gauge is set at a central portion of the bar material. Next, the eccentricity of the bar is measured with a dial gauge while rotating the bar, and the bar is fixed at the portion having the largest eccentricity. Next, a pressing force is applied to the bar material to correct the eccentric state. Thereafter, the amount of eccentricity is measured again by the dial gauge, and the correction status is checked to determine the quality.

[0004]

However, according to the above-mentioned method, although it is possible to measure each bar material with considerable accuracy, it takes only a long time to measure each bar material. In addition, since the straightness is corrected manually, there is a problem that work efficiency is low and mass production must be dealt with by human naval tactics.

In addition, there is an individual difference between workers, and it is not expected that straightness is measured at the same level for all bar materials and corrected based on the measured data. Varies. Therefore, for a material requiring high precision straightness, such as a bar material for a valve spring used for an intake / exhaust valve of an automobile engine, quality control becomes insufficient and reliability is impaired. There are also problems.

[0006] Therefore, an object of the present invention, accurately automatically measure the straightness with a simple configuration relatively, measured de - straightness Fixed equipment for bar member that can be modified to efficiently based on data Is to provide.

[0007]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a method for cutting and supplying a bar material (P) to achieve the above object.
Receiving part (14) for the bar material (P) to be
Guide bar material (P) cut out connected to 4)
A rail (15); and a rail disposed on the rail (15).
-Extraction member (1) that functions as a stopper for material (P)
6) and corresponding to the position of the take-out member (16)
And the bar material (P) is placed on both ends.
(P) is rotatable, and can be moved forward by lifting means.
Ascending between the lower position and the upper position of the recording member (16)
Rotating rolls (6, 7) that can be lowered, and the rotating part that has risen
Supported by (1) and by rotating rolls (6, 7)
Inspecting the eccentric state of the intermediate part of the rotating bar (P)
A sensor means (13) and a sensor means (13);
Based on the detection result, the middle part of the bar (P) is eccentric.
A pressure member (24) for applying pressure to correct the condition.
The inspected or corrected bar material (P) is removed from the rotating part (1).
It can be lowered while placed on rotating rolls (6, 7).
With this, it is transferred to the take-out member (16),
So that it can be taken out while rolling on the rail (15).
Characterized in that the.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS. In FIG. 1, reference numeral 1 denotes a rotating portion of a bar member, for example, a first base portion 2 having a flat plate shape, and a pair of support plates 3 erected on the base portion 2 at predetermined intervals. 4, two rotating shafts 5 and 5 rotatably supported at predetermined intervals on the supporting plates 3 and 4, and fixed to rotating shaft portions (5 and 5) protruding from the supporting plates 3 and 4. And at least one of the rotating shafts 5
, A pulley 8 fixed to the base 2, a first rotating means 9 such as a stepping motor fixed to the base 2, and a rotating means 9
And a belt 10 stretched between the pulley 8 and the pulley 8 to transmit the rotation to the rotation shaft 5. The rotary unit 1 is configured to move up and down between a solid line position and a dotted line position using cylinders 12 and 12 with respect to a second base unit 11 such as a floor surface. . A bar material P is placed on the above-mentioned rotary rolls 6 and 7, and a sensor means 13 is arranged so as to sandwich a central portion thereof. The sensor means 13 comprises, for example, a light emitting device 13a for emitting laser light and a light receiving device 13b, and is fixed using a third base portion (18) of a correcting portion described later. Have been.

On the other hand, a bar P
Is disposed, and a bar is provided at the lower end thereof.
An opening for cutting out the material P is formed. Rails 15 extend from both sides of the opening, and the height of the rail 15 is set to be equal to or slightly higher than the position where the rotating unit 1 is lowered to the position indicated by the dotted line. This rail 1
A take-out member 16 having an inclined surface at one end is disposed at a portion corresponding to a portion between the rotary rolls 7, 7 (6, 6).
You. In this extraction member 16 is supplied les from the accommodating portion 1 - also functions as a member - a stopper of wood P - bar cut out via the Le 15a.

A correction unit 17 is disposed above the rotary unit 1 of the bar. The correction portion 17 is, for example, a third base portion 18 having a flat plate-like shape and having an opening 18a at a predetermined portion, a support plate 19 erected on the base portion 18, and fixed to the support plate 19. A second rotating means 20 such as a stepping motor, an eccentric cam 21 fixed to a shaft of the rotating means 20, a cam follower 22 rotatably supported by the eccentric cam 21, and a third base. A guide means 2 such as a guide rail erected on the portion 18 so as to be spaced from and opposed to the support plate 19;
3 and a pressing member 24 which moves up and down by engaging with the guide means 23 and whose tip 24a is inserted through the opening 18a. In particular, the cam follower 22 is inserted and arranged in a concave portion 25 that opens laterally of the pressing member 24. Further, a wedge-shaped protrusion is formed on the back side thereof, and this protrusion is slidably engaged with a wedge-shaped recess formed in the guide means 23. The above-described correcting unit 17 controls the rotational movement of the second rotating means 20 by the eccentric cam 21, the cam follower 22, the guide means 23, and the pressing member 2.
The bar material P is converted into a linear motion by the cooperative action with the bar member 4, and a pressing force is applied to the bar material P. Note that, for example, an L-shaped support member 26 is fixed below the third base portion 18, and a light-emitting device 13a and a light-receiving device 13b constituting the sensor means 13 are fixed to each of them. .

Numeral 30 denotes control means, and the sensor means 13
Is A / D converted by A / D conversion means 31,
The converted data is stored in the memory means via the bus line. The control means 30 includes first and second rotating means 9,
20 is connected via drivers 32 and 33 and an input / output interface 34. Further, a display device 37 such as a floppy disk or disk 35, a keyboard 36, or a CRT is connected to the control means 30 via a bus line. The control means 30 includes an A / D conversion means 31
The straightness of the bar material P is measured by performing arithmetic processing on the A / D-converted conversion data in the above, and the bar material is controlled by controlling the second rotating means 20 based on this data. The straightness of P is modified.

Next, a method of correcting the straightness of the bar material P will be described with reference to FIGS. First, the straightness determination condition of the bar material P is set (step S1). This determination condition is the maximum amount of eccentricity in the central portion of the bar P. For example, in the case of a bar bar having a length of 150 mm and a diameter of 5 mm, the straightness (amount of eccentricity) of the central portion is 0.005 mm. The following are accepted (in FIG. 7, A is a passing line). The judgment conditions are inputted from the keyboard 36 and stored in the memory of the control means 30. Next, the output of the sensor means 13 when the bar material P does not exist between the sensor means 13 is output to the A / D conversion means 31 for A / D conversion.
/ D conversion, and multiplying by a certain constant to set a trigger level (step S2). For example, 99% is adopted as this constant. Next, when the cylinders 12 and 12 descend based on a command from the control means 30, the rotating unit 1 descends from the solid line position to the dotted line position. In connection with this, one bar material P is cut out from the accommodating portion 14 and hits the take-out member 16 while rolling on the rail 15a and stops. When the cylinders 12 and 12 operate again based on a command from the control means 30 and the rotating part 1 rises from the position indicated by the dotted line to the position indicated by the solid line, the rail 15a
The bar material P is delivered to and mounted on the rotating rolls 6, 6, 7, and 7.

Subsequently, when a command from the control means 30 is given to the first rotating means 9 via the input / output interface 34 and the driver 32, the first rotating means 9 is moved in a certain direction. The bar material P starts rotating, and the bar members P also begin to rotate due to the rotation of the rotating shafts 5 and 5 and the rotating rolls 6 and 7. The bar member P is located between the sensor means 13 and partially blocks light from the light emitting device 13a.
Is smaller than when the bar material P is not present, and is higher than the trigger level. Therefore, a detection signal is output from the sensor means 13, and this output is A / D converted by the A / D conversion means 31. This sampling data
Are stored in the memory of the control means 30 (step S
3). The data stored in the memory is processed by the control means 30 and analyzed and compared (step S4). Next, it is determined whether or not the straightness of the bar P is within the standard based on the determination condition (step S5). Step S
In 5, the straightness of the bar material P is within the standard (pass:
If it is determined to be “non-defective”, the rotating unit 1
From the position indicated by the solid line in FIG. 2 to the position indicated by the dotted line in FIG. At the same time, the bar material P is delivered to the take-out member 16 and taken out while rolling on the rail 15 to complete the operation.

On the other hand, when it is determined that the straightness of the bar material P is not within the standard (rejection: defective), the correction amount table B shown in FIG. The correction amount is determined on the basis of (Step S6), and is stored in the memory of the control means 30. For example, the correction amount is 0.1m
In the case of m, the pulse of the pulse number N corresponding thereto is given to the second rotating means 20. Then, the correction is performed based on the determined correction amount (step S7). Specifically, first, the analysis /
The first rotating means 9 is rotated based on the result of the comparison,
The material P is rotated to the maximum bending point, and the rotation is stopped (see FIG. 4A). In this state, a command corresponding to the correction amount is sent from the control means 30 to the input / output interface 3.
4. When given to the second rotating means 20 via the driver 33, the second rotating means 20 starts rotating in a certain direction. At the same time, the rotation of the eccentric cam 21 is transmitted to the cam follower 22, but the cam follower 22
The pressing member 24 is engaged with the guide means 23 in addition to the engagement of the pressing member 24 with the guide means 23. Converted to linear motion. As a result, as shown in FIG. 4B, the pressing member 24 is rotated by a rotation angle corresponding to the number of correction pulses, and the pressing member 24 is lowered accordingly, and a pressing force is applied to the bar material P to correct the bending. Thereafter, the pressing member 24 rises and returns to the state of FIG. 4A.

Next, as in step S3, the bar material P is rotated once based on the rotation of the first rotating means 9, and the signal from the sensor means 13 during that time is converted by the A / D converting means 31. After conversion, the converted data is stored in the memory of the control means 30 (step S9). Then, the data stored in the memory is processed by the control means 30, analyzed and compared (step S9). Next, whether the straightness of the bar material P is within the standard is determined again based on the determination condition (step S10). If it is determined in step S10 that the straightness of the bar material P is within the standard (pass: good product), the rotating unit 1 moves from the solid line position in FIG. Descend to At the same time, the bar material P is delivered to the take-out member 16 and taken out while rolling on the rail 15 to complete the operation. On the other hand, if it is determined that the straightness of the bar material P is not within the standard (rejection: defective) despite being corrected, the correction amount table shown in FIG. -The table (B) is automatically corrected (step S11) and stored in the memory of the control means 30. For example, when the correction amount is 0.1 mm, if the pulse of the number N of pulses corresponding to the correction amount is given to the second rotating means 20 and the correction is insufficient and does not fall within the standard, the correction table B is used. Is automatically corrected partially to the table C shown by the dotted line in FIG. 7 (the number of pulses is corrected to N + α), and is fed back to step S3. Thereafter, the correction amount is determined based on the correction table. Then, the straightness is measured again and the correction based on the measured data is performed through the same steps after step S3.

The present invention is not limited to the above-described embodiment. For example, the analysis result of data can be stored on a floppy disk or the like, or the stored data can be displayed on the display device 3.
7 can be displayed. In addition, if the value does not fall within the standard even after being corrected a certain number of times, it may be configured to be rejected and discharged. Also, a bar to the rotating part
The material can be supplied directly by using a robot or the like in addition to using the rails cut out one by one from the storage section. Further, the length and thickness of the bar material can be selected as appropriate, and the correction means for the correction can directly apply a correction signal to the pressing member that moves linearly, in addition to the structure that converts the rotary motion into linear motion. It can also be configured to do so.

[0019]

As described above, according to the present invention, the signal output from the sensor means while the bar material makes one rotation by the rotating roll of the rotating unit is A / D converted, and the converted data is converted. The corrective amount of straightness is calculated by processing the data by the control means, and the straightness is automatically corrected based on the corrected amount, so that the correcting operation can be performed efficiently.

Further, after the straightness is corrected, the correction result is checked. If the correction is not satisfactory, the correction table is appropriately corrected and fed back, so that the actual measurement and correction are repeated. The correction time is shortened, the correction work is performed more efficiently, the accuracy is improved, and a stable bar material with less variation can be provided.

In particular, if the correction unit is configured to convert the rotational movement of the rotating means into a linear movement by a combination of the eccentric cam, the pressing member and the guide means, the correction amount can be reduced with a relatively simple structure. As a result, high-precision correction becomes possible, and a high-quality bar material can be obtained.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing one embodiment of the device of the present invention.

FIG. 2 is a partially cutaway side view of FIG. 1;

FIG. 3 is a plan view of a correction unit according to the present invention.

4A and 4B are views for explaining a correction state, wherein a is a side view before correction, and b is a side view after correction.

FIG. 5 is a block diagram for measuring and correcting straightness.

FIG. 6 is a flowchart for measuring and correcting straightness.

FIG. 7 is a diagram showing a change state of a correction amount table.

[Explanation of symbols]

 P bar material 1 rotating part 2,11,18 base part 3,4,19 support plate 5 rotating shaft 6,7 rotating roll 9,20 rotating means 13 sensor means 13a light emitting device 13b light receiving device 14 receiving part 15, 15a rail 17 correction part 21 eccentric cam 22 cam follower 23 guide means 24 pressing member 25 concave part 30 control means 31 A / D conversion means 32, 33 driver 34 input / output interface 35 floppy disk 36 Keyboard 37 Display device

Continuation of front page (56) References JP-A-61-255720 (JP, A) JP-A-56-81417 (JP, A) JP-A-7-96328 (JP, A) JP-A-1-85612 (JP) , U) Hikaru Hei 2-28318 (JP, U) (58) Fields studied (Int. Cl. ⁷ , DB name) G01B 11/30 101 B21D 3/10

Claims (1)

(57) [Claims] 1. Bar material for cutting out and supplying a bar material (P)
(P) accommodation part (14) and bar material cut out connected to the accommodation part (14)
A rail (15) for guiding the (P), and a bar (P) for storing the bar (P) disposed on the rail (15).
A take-out member (16) that functions as a par, and is disposed corresponding to the position of the take-out member (16);
-Turn the bar (P) with both ends of the bar (P) placed.
Rotatable, and said take-out section
A turn capable of ascending and descending between the lower position and the upper position of the material (16)
Rotating rolls (6, 7) and rotating rolls supported by the raised rotating portion (1)
Of the middle part of the bar (P) rotated by (6, 7)
A sensor means for inspecting an eccentric state; and a bar member based on a detection result of the sensor means.
Pressurizing the middle part of (P) to correct the eccentric state.
A pressure member (24), and the inspected or corrected bar (P) is used for rotating the bar (1).
Down while placed on the rotating rolls (6, 7)
In this way, it is delivered on the take-out member (16),
In addition, it will be taken out while rolling on the rail (15)
An apparatus for correcting straightness of a bar material, characterized in that the straightness is corrected.