JPH06182442A - Marking device - Google Patents

Abstract

PURPOSE:To eliminate relative displacement and to surely perform a marking by running a side-moving truck with a billet, holding the billet with a clamping arm and performing the marking through a marking nozzle. CONSTITUTION:Simultaneously when the billet 31 is detected by a billet detector, a crosspiece 16 for detecting an end face is pushed out to the billet side by an air cylinder, and when a limit switch is turned on, a truck 7 for moving back and forth is advanced. A gear and a clamping shaft are rotated by the air cylinder 21 constituting a clamp mechanism, the clamping arm 19 is closed and the billet 31 is held in between. Simultaneously with the start of the clamping, a twin rod cylinder constituting an upper surface detecting mechanism is operated to lower a contactor and press it to the upper surface of the billet. By the marking nozzle, the marking is performed on the end face of the billet by means of an X-Y mechanism provided in the truck 7 for moving back and forth, with the middle position of the clamp as a reference for the X-direction and with the upper surface of the billet as a reference for the Y-direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a marking device for marking a moving marking object.

[0002]

2. Description of the Related Art Steel products and the like produced in steel factories are marked to show the attributes of the products. Such marking is often made while the steel material is stationary, but it may also be made while moving on a conveyor or the like. Conventionally, marking and reading on steel materials has a large track record for large surfaces such as slabs, and in the case of billets that are rod-shaped steel materials, marking was performed on the longitudinal surface, but recently, billets Marked on the end face.

[0003]

For this reason, the marking surface is small, and the marking surface of the billet varies with respect to the marking nozzle or the reading device, and the billet rolls. The erecting direction cannot be kept constant. If the end face is small, it is about 100 mm square, and due to bending of the end face due to cutting or warping of the entire rod shape, the marking face will be displaced from the reference position when it is transported to the marking position. Is it normal or not. Therefore, the conventional technique cannot correctly perform marking.

Further, when marking on a small end face of about 100 mm square, the end face is often printed in full due to the relation between the character size and the number of characters. If the reference position of the marking nozzle is not aligned with the end face position of the billet material, the character will end up. It will stick out. In addition, the position of the end face is not always conveyed at a constant position, and there is some movement in and out, and the distance between the marking nozzle and the marking end face must be set to a constant value.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a marking device capable of appropriately marking a moving marking object.

[0006]

In order to achieve the above-mentioned object, a parallel running section that runs in parallel with a moving marking object, a gripping section that is provided in this parallel running section and holds the marking object, and a parallel running section that is provided in the parallel running section are provided. A marking part for marking on the marking surface, an object detecting part for detecting the marking object, and when the object detecting part detects the marking object, the parallel running part runs in parallel with the marking object, and the gripping A control unit for controlling the marking surface to be marked by the marking unit after the marking target is gripped by the unit.

[0007] Further, a parallel running portion that runs in parallel with the moving marking object, a forward-backward moving portion that is provided in the parallel running portion and moves forward and backward toward the marking surface, and the marking target that is provided in the forward-backward moving portion or the parallel running portion. A gripping part for gripping an object, a marking part provided on the forward / backward moving part for marking the marking surface, a relative position detecting part for detecting a relative position between the forward / backward moving part and the marking surface, and the marking object. And an object detection unit that detects the marking object, the parallel running unit moves in parallel with the marking object, and the marking surface and the forward and backward movement are detected according to the detection value of the relative position detection unit. Part to keep a predetermined distance, and after the gripping part grips the marking object, the marking part marks the marking surface. Those having a control unit for controlling so as to ring.

The gripping portion is configured to grip the marking object by an arm that opens and closes left and right with respect to the marking surface, and positions the left and right center of the arm as the center of the marking in the left and right direction. The marking is performed according to the section.

Further, a direction perpendicular to the moving direction of the marking object and the vertical direction of the marking surface is defined as a height direction, and the height direction of the parallel running part or the forward / backward moving part and the marking object is A height detection unit for measuring a relative distance is provided, the marking position is positioned in the height direction based on the detection value of the height detection unit, and the marking unit performs the marking.

[0010]

When the target detection unit detects the marking target by the control unit, the parallel running unit runs parallel with the marking target, and then the gripping unit grips the marking target to separate the marking unit and the marking target. The relative position of is fixed and the marking surface is marked by the marking part. As a result, it is possible to mark the moving marking object under the same conditions as those in the stationary state.

Further, under the control of the control unit, when the target detecting unit detects the marking target, the parallel running unit runs parallel with the marking target, and the forward / backward moving unit keeps a predetermined distance from the marking surface by the detection value of the relative position detecting unit. In this way, the marking object can be held by the holding portion, and the marking surface can be marked by the marking portion. As a result, the marking object is kept stationary and the marking surface and the marking portion are held at a predetermined distance, so that accurate marking can be performed.

Further, since the marking target is configured to be gripped by the arm that opens and closes the gripping portion to the left and right with respect to the marking surface, the left and right centers of the arm are provided with a lateral center of the marking or a fixed positional relationship. Can be positioned. As a result, it is possible to accurately draw a character on the small marking surface in the left-right direction.

Further, the height detecting section measures the relative distance in the height direction between the marking object and the parallel running section or the forward / backward moving section to determine the positional relationship in the height direction between the marking section and the marking surface. As a result, it is possible to accurately mark in the height direction.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of this embodiment, and FIG. 2 is the X of FIG.
-X sectional view, FIG. 3 is a YY sectional view and a ZZ sectional view of FIG. This will be described below with reference to FIGS. Figure 1
In the above, the rail supporting beam 1 is provided in parallel with the conveyor 30, and square bar-shaped billets 31 are continuously conveyed on the conveyor 30 at a predetermined interval. As for the relationship between the conveyor 30 and the rail support beam 1, as shown in FIG. 2, the rail support beam 1 is installed outside the conveyor 30 in parallel with the conveying direction of the conveyor 30. Two rails 2 are provided on the lower surface of the rail support beam 1, and a linear motion bearing 3 having a bearing is attached to the rail 2 so that the parallel carriage 4 can travel along the rail 2 smoothly. ing. A rack 5a is installed on the side of the rail support beam 1,
The parallel traveling carriage 4 is engaged with the output gear 5b rotated by the parallel traveling motor 6 attached to the parallel traveling carriage 4 to convey the parallel traveling carriage 4 to the conveyor 30.
Run in parallel with.

Rails 8 are provided on both inner side surfaces of the parallel trolley 4 in a direction orthogonal to the rail support beams 1.
Forward / backward bogie 7 via linear motion bearing 9
Is installed. A forward / backward motor is provided on the rear side of the parallel traveling carriage 4.
10 is attached and the ball screw 11 is rotationally driven to move the forward / backward traveling carriage 7 along the rail 8 in the direction perpendicular to the rail support beam 1, that is, in the horizontal direction in FIG.
Regarding the moving direction of the forward / backward moving carriage 7, the movement in the billet 31 direction is referred to as the forward direction, and the movement in the opposite direction is referred to as the backward direction.

A marking nozzle 12 is provided in front of the lower surface of the forward / backward traveling carriage 7. The marking nozzle 12 uses the end surface of the billet 31 as a marking surface, and X, Y on the marking surface.
Set the coordinates and move in the X and Y directions to mark letters, numbers, etc.

The end face detecting mechanism of the billet 31 is a forward / backward moving carriage 7.
Of the air cylinder 13, the parallel link 14 driven by the air cylinder 13, the end face detection vertical member 15 that moves forward and backward by the parallel link 14, and the end face detection vertical member 15 is attached at a right angle. An end face detecting horizontal member 16 that moves forward and contacts the end face of the billet 31, a limit switch 17 that detects the backward limit of the end face detecting vertical member 15, and a limit switch 18 that detects the forward limit.

In the end face detecting operation, first, at the retracted position of the forward / backward moving carriage 7, the air cylinder 13 is extended to move the end face detecting cross member 16 forward through the parallel link 14 toward the billet end face, and the limit switch 18 is turned on. Make sure that. When the forward / backward moving carriage 7 is moved forward from this state, the end face detection cross member 16 hits the billet end face, and the end face detection cross member 16,
The end face detection vertical member 15, the parallel link 14, and the air cylinder 13 are pushed back, and the limit switch 18 is turned off. By stopping the forward movement of the forward / backward moving carriage 7 at this timing, the distance between the marking nozzle 12 and the billet end face is set to the optimum position. Forward / backward carriage 7 for billet end face
Simultaneously with the completion of positioning, the air cylinder 13 contracts to retract the end face detection cross member 16 and prevent the interference with the marking nozzle 12.

The clamp mechanism of the billet 31 is a forward-reverse carriage 7
A clamp arm 19, a clamp shaft 20 for rotating the clamp arm 19, and an air cylinder 21.
And a rack 22 that moves up and down by this air cylinder 21.
And a gear 23 that meshes with the rack 22 and rotates to rotate the clamp shaft 20. Billet clamping mechanism
The 31 is sandwiched from the left and right, and the force causes the parallel carriage 4 to follow the movement of the billet 31 via the forward / backward carriage 7.

The clamp arm 19 moves the rack 22 up and down by the air cylinder 21, and the left and right gears that mesh with the rack 22.
23 are rotated in opposite directions, and the clamp shaft 20 transmits this rotation to the clamp arm 19 to open and close the clamp arm 19. The clamp arm 19 is closed when the rack 22 is pulled upward by the air cylinder 21, and opened when pushed downward. The opening of the clamp arm 19 is detected by a rotary potentiometer 24 that detects the rotation of the clamp shaft 20, and the A /
Based on the data after D conversion, the clamp completion is confirmed for each billet 31 size.

The upper surface detecting mechanism of the billet 31 is a forward / backward moving carriage 7.
It is installed on the front of the and uses the twin rod cylinder 25.
A contactor 26 is provided at the tip of the rod to prevent the rotation of the rod and press it against the upper surface of the billet. The amount of movement of the contact 26 from the upper limit position is detected by a detector such as a linear potentiometer or a magnet scale. In this embodiment, a linear potentiometer 27 is used, and its output signal is A / D converted and used.

In the detecting operation, first, the twin rod cylinder 25 is extended and the contact 26 is lowered in a state where the forward movement position of the forward / backward traveling carriage 7 is determined by the operation of the end face detection mechanism. The moving position of the twin rod cylinder 25 is a linear potentiometer.
27 and generates an analog signal proportional to the lowered position. When the contact 26 comes into contact with the upper surface of the billet, the analog signal does not increase any more. Therefore, the time when this state is stored is stored as the billet upper surface position and reflected in the start position when the marking nozzle 12 starts marking. This eliminates the deviation of the marking position with respect to the vertical displacement of the billet 31. The change in the output signal of the linear potentiometer 27 is corrected by taking in the data after A / D conversion at a constant cycle.

A billet detector 28 is provided on the front surface of the parallel trolley 4, and when the billet 31 enters the clampable range while the parallel trolley 4 is on standby in the standby position shown by position 1 in FIG. And billet 31 are run in parallel to start a series of marking operations. The billet detector 28 uses a laser projection type reflection sensor to accurately detect the position of the billet 31.

FIG. 4 is a control block diagram of this embodiment.
The rotary potentiometer 24 detects the opening degree of the clamp arm 19, and the linear potentiometer 27 detects the billet upper surface position. The billet detector 28 detects whether the billet 31 has entered the clamp range. Limit switch
17 (LS1) detects that the end face detection mechanism is in the backward limit, and limit switch 18 (LS2) detects that it is in the forward limit. For the air cylinder 21 for billet clamp, the twin rod cylinder 25 for detecting the upper surface of the billet, and the air cylinder 13 for detecting the end surface of the billet, signals are output from the sequencer to the solenoid valves SV1 to SV3, respectively, so that the solenoids of the solenoid valves are turned on, When it is turned off, the valve is opened and closed accordingly, and the supply of compressed air to each cylinder is opened to operate. The parallel running motor 6 is operated via an inverter for frequency control.

Next, the operation of the sequencer will be described with reference to the timing chart shown in FIG. The parallel carriage 4 stands by at the stand-by position shown as position 1 in FIG. The standby status of other equipment is as follows. Forward / backward carriage: Backward limit Clamp arm: Open Top detector: Upward limit End face detector: Backward limit

When the billet 31 is conveyed by the conveyor 30, the billet detector 28 detects the billet center before the billet center enters the clamp center. When the parallel traveling vehicle 4 is detected, the parallel traveling vehicle 4 starts to move at the same speed as the conveyor 30 after a timer time ΔT that can be arbitrarily set. That is, ΔT is set so that the center of the clamp coincides with the center of the billet after the trolley 4 is activated.

At the same time that the billet detector 28 detects the billet 31, the air cylinder 13 constituting the end face detecting mechanism of the billet 31 pushes the end face detecting cross member 16 toward the billet side. The end face detection cross member 16 reaches the forward limit, and the limit switch 18 turns on.
Then, the forward / backward motor 10 is activated to move the forward / backward carriage 7 forward. The end face detecting lateral member 16 is moved forward by the forward and backward movement of the carriage 7 and hits the billet end face to be pushed back. As a result, the limit switch 18 is turned off, and
The brake is applied by F to stop the forward / backward traveling carriage 7. At this point, the distance between the marking nozzle 12 and the billet end face becomes a set distance, that is, a distance suitable for marking. Continuously, the end face detection mechanism is an air cylinder until the backward limit
By contracting 13 the end face detecting horizontal member 16 is retracted to prevent interference with the marking nozzle 12.

When the end face detection cross member 16 moves backward to the backward limit,
Rack 22 with air cylinder 21 that constitutes the clamp mechanism
Is moved upward to rotate the gear 23 and the clamp shaft 20 to close the clamp arm 19 and sandwich the billet 31. Clamp shaft
The rotation angle of 20 is detected by the rotary potentiometer 24, and after A / D conversion, it is confirmed that the clamp angle set for each billet size has been reached, and the clamp is completed. Also, when the clamp starts, the parallel truck motor 6
The output shaft of is released by the built-in clutch mechanism and becomes free. As a result, the parallel carriage 4 is billet 31
Will be transported by.

Simultaneously with the start of clamping, the twin rod cylinder 25 constituting the upper surface detection mechanism is operated to lower the contact 26 and press it against the upper surface of the billet. The displacement of the twin rod cylinder 25 is detected by the linear potentiometer 27, and after the A / D conversion, the change is monitored, and when the change disappears, the displacement from the reference point on the upper surface of the billet is calculated and the initial position of the marking start is set. To reflect. When the upper surface detection is completed, the contact 26 is raised by the twin rod cylinder 25.

The marking nozzle 12 uses the XY mechanism provided in the forward / backward traveling carriage 7 to mark the billet end face with the center position of the clamp as the reference in the X direction and the billet upper face as the reference in the Y direction.

When the marking is completed, the clamp arm 19
Is opened, the forward / backward traveling carriage 7 is moved backward, and the parallel traveling carriage 4 is stopped when the interference with the billet 31 is eliminated. This position is position 2 in FIG. Next, the parallel truck 4 returns to the standby position of position 1 and waits for the arrival of the next billet 31.

[0032]

As is apparent from the above description, according to the present invention, marking is performed by moving in parallel with a moving marking object and gripping the marking object to eliminate relative displacement between the marking object and the marking device. As a result, marking can be done reliably.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

3 is a YY cross section and a ZZ cross section of FIG. 2;

FIG. 4 is a control block diagram of the present embodiment.

FIG. 5 is a timing chart of the present embodiment.

[Explanation of symbols]

 1 rail support beam 2,8 rail 3,9 linear motion bearing 4 parallel truck 5a, 22 rack 6 parallel motor 7 forward / backward truck 10 forward / backward motor 12 marking nozzle 13, 21 air cylinder 14 parallel link 16 end face detection lateral member 17, 18 Limit switch 19 Clamp arm 25 Twin rod cylinder 26 Contact 28 Billet detector 30 Conveyor 31 Billet

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Mitsuo Yoshida 12 Nakamachi, Muroran-shi, Hokkaido Inside Nippon Steel Corporation Muroran Works (72) Inventor Yoichi Sugimoto 12 Nakamachi, Muroran-shi, Hokkaido Nippon Steel Corporation Muroran Works

Claims (4)

[Claims] 1. A parallel running portion that runs in parallel with a moving marking object, a gripping portion that is provided in the parallel running portion and holds the marking object, and a marking portion that is provided in the parallel running portion and that marks a marking surface. An object detection unit that detects a marking object, and the object detection unit detects the marking object and causes the parallel running section to run in parallel with the marking object, and after gripping the marking object by the gripping unit, A marking device comprising: a control unit that controls the marking surface to mark the marking surface. 2. A parallel running portion that runs in parallel with a moving marking object, a forward-backward moving portion that is provided on the parallel running portion and moves forward and backward toward a marking surface, and the marking target that is provided on the forward-backward moving portion or the parallel running portion. A gripping part for gripping an object, a marking part provided on the forward / backward moving part for marking the marking surface, a relative position detecting part for detecting a relative position between the forward / backward moving part and the marking surface, and the marking object. And an object detection unit that detects the marking object, the parallel running unit moves in parallel with the marking object, and the marking surface and the forward and backward movement are detected according to the detection value of the relative position detection unit. Part to keep a predetermined distance, and after the gripping part grips the marking object, the marking part marks the marking surface. A marking device including a control unit for controlling the marking device. 3. The marking unit is configured to grip the marking object by an arm that opens and closes left and right with respect to the marking surface, and positions the center of the arm on the left and right as the center of the marking in the left-right direction. The marking device according to claim 1 or 2, wherein marking is performed by a section. 4. A height direction is a direction perpendicular to a moving direction of the marking object and a vertical direction of the marking surface, and the height direction of the parallel running portion or the forward / backward moving portion and the marking object is A height detection unit for measuring a relative distance is provided, the marking position is positioned in the height direction based on a detection value of the height detection unit, and the marking is performed by the marking unit. 3. The marking device according to any one of 3.