JPH09123045A - Display system for spring grinder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an operator to know a transition of a detecting length measured value of a spring height to a tolerance range in spring grinding work by a spring grinder. SOLUTION: In a grinding spring held by a turntable of a spring grinder, its height is detected by a length detecting device. Output of this length detecting device is sent to a computer. The computer displays a length detecting result in real time on an image screen of a console panel by a broken line graph 27 as a grinding process control drawing on the basis of detection from the length detecting device. In the broken line graph 27, a detecting length measured value is shown on the axis of ordinate, and the axis of abscissa shows the lapse of time.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a display system in a spring grinder.

[0002]

2. Description of the Related Art Conventionally, there has been known a spring grinder which grinds both end surfaces of a spring set on a turntable with upper and lower grindstones simultaneously in a dry manner. These spring grinders are provided with an operation panel, and are configured so that data necessary for grinding can be input to the controller from the operation panel.

[0003]

None of the above spring grinders is designed to display the measurement result of the grinding spring length measurement on the display device in real time. The present invention displays the measurement result of the grinding spring in a line graph in real time, and the operator can
This makes it possible to know the transition of the length measurement measurement with respect to the tolerance range.

[0004]

In order to achieve the above object, the present invention measures the height of a grinding spring held by a turntable of a spring grinder by a length measuring device, and the length measuring data is stored in a computer. Then, the computer displays the measurement result in a line graph in real time on the display device of the operation panel of the spring grinder.

[0005]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 2 shows a schematic configuration of a spring grinder and a length measuring device. The spring grinder 2 is a vertical type with four upper and lower grindstones, and simultaneously grinds both end surfaces of the spring 8 held by the bush 12 of the turntable 10 in a dry manner. The grinding method of the present machine 2 is either K type (1 to 5 passes) grinding performed with a constant gap between the upper and lower grindstones 4 and 6 or F type (constant size cutting) grinding that automatically feeds the upper grindstone 4. It is configured so that it is possible.

Therefore, the machine 2 can be freely switched and used for grinding a spring with high precision and quality as standard, or for grinding a spring with a focus on mass production and efficiency. Reference numeral 14 is a length measuring device, and the lift holder 18 descends along the pole 20 via a ball screw directly connected to the length lifting servomotor 16 to move the lift holder 1
The measuring rod 22 attached to 8 is the grinding spring 8
The touch sensor 24 sends a signal to the computer 26 at the moment of lightly touching the upper end surface of the. Computer 26
The position of the measuring rod 12 is calculated, the height of the grinding spring 8 is stored in the memory, and the display device 3 of the operation panel 28 is used.
The line graph 27 is displayed at 0.

Next, the operation of the computer 26 displaying the grinding process control chart (line graph 27) on the screen of the operation panel 28 will be described. In the grinding process control chart displayed on the screen of the display device 30 of FIG. 1, the vertical axis represents the measured value of the grinding coil spring and the horizontal axis represents the elapsed time. The screen 30 'displays the measurement result of the processed (grinding) coil spring in real time each time. This graph allows the operator to know the transition of the measurement value for the tolerance range.

[0008] As one of means for controlling the measured measurement value so as not to fall out of the tolerance range, when the measurement exceeds 60% of the tolerance range (plus / minus 30% / minus 30% of the tolerance center) three times, The computer 26 issues a grindstone interval correction command to the lifting / lowering control device 32 for the upper grindstone 4 of the spring grinder 2. When the measurement exceeds plus 30% three times, the computer 26 issues a slight descending command to the upper grindstone lifting control device 32 and displays the marks a and b in the minus column 34 of the screen 30 '.

When the measurement exceeds -30% for three times, a small amount of ascending command is issued to the upper grindstone lifting control device 32,
A mark is displayed in the plus column 36. Grinding the machined spring naturally wears off the grindstone, increasing the spacing between the upper and lower grindstones 4, 6 and increasing the free height of the spring after grinding.
This grindstone wear amount is provided with wear correction sensors 38 and 40 on the upper and lower grindstones 4 and 6, respectively, and when a certain wear amount is reached, each sensor 38 and 40 outputs a signal. As the sensors 38 and 40, a capacitance type sensor, an air micrometer or the like can be used.

Based on this signal, the computer 26 supplies a drive control signal to the upper and lower grindstone lifting control devices 32 and 42 to correct the grinding surfaces of the upper and lower grindstones 4 and 6 to the reference positions. When this sensor 38, 40 signal is output, screen 3
Marks c and d are displayed above and below the 0 ′ grindstone wear correction column 44. From this, it is possible to understand the relationship between the wear of the grindstones 4 and 6 and the measured length value.

The intervals at which the marks a, b, c, d are displayed allow the operator to reflect the correction amount in the selection of the set amount when inputting it to the computer 26. or,
Marks a, b, from the beginning to the end of the use of one whetstone
If c and d are displayed at regular intervals, it can be seen that the grindstone had a stable coarse density and hardness. Also,
From this, it is possible to know the degree of variation of the grinding wheel.

[0012]

[Effect] Since the present invention is configured as described above, it is possible to know the transition of the measurement measurement value with respect to the tolerance range from the screen of the operation panel.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an example of a grinding process control diagram displayed on a screen of an operation panel.

FIG. 2 is a schematic side view of a spring grinder and a length measuring device.

FIG. 3 is a block diagram of the entire system of the present invention.

FIG. 4 is a front view of the operation panel.

[Explanation of symbols]

 2 Spring grinder 4 Upper grindstone 6 Lower grindstone 8 Spring 10 Turntable 12 Bush 14 Length measuring device 16 Length measuring servo motor 18 Lifting holder 20 Pole 22 Length measuring rod 24 Touch sensor 26 Computer 27 Line graph 28 Operating panel 30 Display device 30 'screen 34 minus column 36 plus column 44 grindstone wear compensation column

Claims (1)

[Claims] 1. The height of a grinding spring held on a turntable of a spring grinder is measured by a length measuring device, the length measuring data is sent to a computer, and the computer displays it on a display device of an operating panel of the spring grinder. A display system for a spring grinder, which is characterized by displaying the measurement result in a line graph in real time.