JP2946662B2 - Steel bar deburring machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine that grinds an edge of a cut steel bar with a grinder to remove burrs.

[Conventional technology]

The burrs formed at the edges of the steel bars cut by the emery saw were almost cut off by hand, but in order to save labor and mechanize, the steel bars were conventionally supported to rotate on the working table, A grinder was provided at the tip of the arm that swings by the cylinder, and when the bar was placed on the processing table, the cylinder was operated to bring the grinder into contact with the edge of the bar to grind the burrs. .

[Problems of the prior art]

However, conventional deburring machines, for example, detect the load current of a grinder motor, and when the load current exceeds a predetermined value, judge that the steel bar has been properly ground and stop the grinding. I was trying to do it.

However, in the case of a deburring machine, the load current of the grinder fluctuates greatly and excessively during grinding due to the burr condition.Therefore, if the grinding time depends on the fluctuation of the load current, the actual amount of grinding will be too large or too small and will always be necessary. There is a problem that a sufficient grinding state cannot be obtained.

[Means for solving the problem]

The steel bar deburring machine of the present invention is intended to solve the above-described problem, and a grinder is provided so as to move toward and away from an edge of a steel bar supported so as to rotate on a processing table, and the grinder is provided. A spark detector for detecting sparks scattered by contacting the steel bar is provided, and the amount of sparks detected by the spark detector is integrated, and the grinder is separated when it reaches a fixed amount. Things.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a carry-in conveyor for transferring a steel bar 2 from a cutting machine (not shown), and 3 denotes an inclined shelf which rolls the steel bar 2 unloaded from the carry-in conveyor 1 by its own weight and moves it in the width direction. Reference numeral 4 denotes a carry-out conveyor provided at the lower inclined end of the inclined shelf 3. At a substantially intermediate portion of the inclined shelf 3, there is provided a processing table 5 capable of supporting the steel bar 2 so as to rotate. 6,
.. Are stoppers provided upstream of the processing table 5 so that the steel bars 2 can be supplied one by one onto the processing table 5, and each of the stops 6, 6,. Protruding from a shaft 7, the interlocking shaft 7 is connected to an operating shaft of a cylinder 9 via an arm 8. For this reason, cylinder 9
When the interlocking shaft 7 is rotated by the operation of
Move up and down from the upper surface of the inclined shelf 3. The processing table 5 has a part of the inclined shelf 3 cut away, and bearings 10 and 10 are provided at the part of the inclined shelf 3 so as to be rotatable. Are deflectors provided for jumping up the steel bar 2 supported by the receiving rollers 11, 11 after deburring, and the deflectors 12, 12,... Are vertically movable by guide rollers 13, 13. Are supported, and the lower end of the ejector 12, 12,... Is pivotally connected to an arm 16 of a support shaft 15 supported by a bearing 14 with a pin 17, and the tip of another arm 18 of the support shaft 15 is actuated by a cylinder 19. The shafts are connected by pins 20. Therefore, when the cylinder 19 is operated and the support shaft 15 is rotated, the ejectors 12, 12,...

Further, 21 and 21 are a pair of drive rollers provided for rotating the steel bar 2 rotatably supported by the receiving rollers 11 and 11, and the drive rollers 21 and 21 are, as shown in FIG. The motor 22 is connected to a motor 22 with a speed reducer provided at a lower portion by transmission of a belt 23, and is rotated by the motor 22 with a speed reducer.
Reference numeral 25 denotes a push roller for pressing the steel bar 2 onto the drive rollers 21 and 21, and the push roller 25 is provided so as to be moved up and down by a cylinder 27 provided vertically on a support 26.
Reference numeral 28 denotes a cylinder horizontally provided on one side of a column 26, and a fixed plate 29 is fixedly provided at the tip of an operation shaft of the cylinder 28, and the cylinder 27 is advanced by the operation of the cylinder 28, so that a corresponding plate is provided. 29 abuts against the end face of the steel bar 2 so that the end face can be aligned.

Further, an arm 31 is pivotally supported on a support shaft 30 horizontally protruding from one side of the support column 26, and a grinder 32 is provided at a tip of the arm 31. The grinder 32 is formed by directly connecting a disc-shaped grindstone 34 to a rotating shaft of a motor 33, and 35 is the disc-shaped grindstone.
34 covers. Reference numeral 36 designates an operating shaft of the grinder 32 for swinging the support shaft 30 as a fulcrum.
And a cylinder connected to the pin by a pin 37. The cylinder 36
The disc-shaped grindstone 34 of the grinder 32 comes into contact with the edge of the bar 2 supported on the processing table 5 at an inclination angle of about 45 degrees from below.

Numeral 38 denotes a spark detector (hot metal detector) provided with its lens downward at the upper portion of the support post 26 so that a spark scattered upward when the disc-shaped whetstone 34 contacts the edge of the steel bar 2 can be detected. . The spark detector 38 is connected to a control device (not shown), and the control device integrates the amount of the spark when the spark detector 38 detects the spark, and when the spark reaches the fixed amount, the circle The cylinder 36 is contracted so as to separate the plate-like grindstone 34 from the edge of the steel bar 2.

For this reason, the steel bar 2 transferred from the carry-in conveyor 1 onto the inclined shelf 3 is supported on the single-piece processing table 5 by the operation of the stoppers 6, 6,... Abuts and presses to align the end surfaces of the steel bars 2. Further, a push roller 25 presses the steel bar 2 onto the drive rollers 21 to rotate the steel bar 2 at a low speed. When the cylinder 36 operates, the grinder 32 grinds the edge of the steel bar 2 and cuts off the burrs. The bar steel 2 thus deburred is jumped up from the processing table 5 by the above-described ejectors 12, 12 and rolls on the inclined shelf 3, and is transferred onto the carry-out conveyor 4.

In this way, the amount of sparks detected by the spark detector 38 is integrated and the grinder 32 is separated when the amount of sparks reaches a certain amount. You can always control properly.

〔The invention's effect〕

As described above, the bar deburring machine according to the present invention can perform appropriate control without error by separating the grinder when the amount of spark generated due to the burr grinding by the grinder reaches a fixed amount, so that excessive shaving or shaving is performed. There is a beneficial effect that a shortage is prevented and a necessary and sufficient grinding state is always obtained.

[Brief description of the drawings]

The drawings show an embodiment of a steel bar deburring machine according to the present invention. FIG. 1 is an overall plan view, and FIG.
FIG. 3 is a sectional view taken along the line BB of FIG. 1, and FIG. 4 is a sectional view taken along the line CC of FIG. 5 Processing table, 11, 11 Receiving roller, 21, 21 Drive roller, 32 Grinder, 36 Cylinder, 38
Spark detector.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B24B 9/00 B24B 9/04 B24B 49/12

Claims (1)

(57) [Claims] 1. A spark detector which is provided so as to move toward and away from an end of a steel bar rotatably supported on a processing table, and detects a spark scattered when the grinder comes into contact with the steel bar. A deburring machine for a steel bar, wherein the amount of sparks detected by the spark detector is integrated, and the grinder is separated when the amount reaches a fixed amount.