JPS63237862A - Scratch removing method and device for steel rod - Google Patents

Abstract

PURPOSE:To reduce manpower by constructing a scratch removing system such that a worker confirms a scratch mark applied during scratch searching process with his eyes then selects the operating direction of a driving vehicle and contacts the vehicle with a steel rod, thereafter advancing/retracting/rotating the steel rod in order to remove the scratch. CONSTITUTION:A worker confirms a mark indicating a scratched portion on a steel rod A carried into a scratch removing zone 5 with his eyes immediately before the steel rod A arrives to a grinding position. Then the worker switches a valve for feeding or discharging pressure fluid to/from cylinders of drive units 10, 10' and an arm operating cylinder of a grinder 30 selectively by means of a control switch for enabling switching operation between advance/retract and forward/rearward rotation through single lever action. In other word, operating direction of a drive vehicle in drive units 10, 10' is selected to contact the vehicle with the steel rod A and advance/retract/rotate the vehicle, so as to remove scratch with contacting condition between a rotary grinding wheel 34 of the grinder 30 and the scratched portion on the surface of the steel rod A being maintained constant. Since the work can be semi-automated, manpower can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application: The present invention relates to an eaves removal method and an apparatus for removing surface flaws on a round steel bar produced during a rolling process by simply removing them using a rotary grindstone.

Background of the invention and problems: During the process of rolling a round steel bar, it often occurs that linear surface flaws in the axial direction or flaws occur on the surface of the bar.
If these defects are transferred directly to the next processing step, these defects will have a negative effect on the secondary processed product, so the defects are always removed in advance. These surface flaws do not occur uniformly, so conventionally, the areas where they occur are marked with an automatic flaw detector, etc., and visually detected on a workbench.
This is removed manually using a grinder. During this work, for example, in order to remove one linear surface flaw, the depth of the removed part is made shallow and the surface is ground into a narrow width, so that the surface from which this flaw is removed does not turn into a groove. Grinding is carried out by moving a rotating grindstone in the axial direction.

In this type of scratch removal work, it is necessary to completely remove the scratches.
Manual work is effective, but inefficient, as it must be done with great care. In addition, since the surface layer of the round steel bar is being ground, a lot of dust is generated, and since the work is done using a both-pull grinder, there is no adequate dust collection equipment, resulting in a poor working environment. Moreover, since it requires a lot of labor, it is a problem in terms of occupational safety and health.

Even if an attempt is made to automate a series of processes in order to improve productivity, it is not possible to streamline the process as a whole because only the removal of defects requires human labor.

Problems to be Solved: In view of this situation, the present invention solves T! ! Without manually operating the grinder, an operator selectively operates a drive device that can move the steel bar to be processed in the axial direction and circumferential direction with respect to the grinder installed at a specific position, To provide a means for removing surface scratches by rationally removing scratches on vs2M using a rotary grindstone, improving the work environment and reducing construction costs by using a simple mechanism. I often come.

Means to Solve the Problem: When removing surface flaws from a round steel bar to be treated, the present invention allows the round bar to be treated to be fed in a straight line from a material supply zone to a flaw removal zone, and is kept at a fixed position in the flaw removal zone. 63 pieces of rotary whetstone for grinder! i9 A drive wheel placed in front and behind the moving direction of the bar with respect to the grinding position by this grinder is placed so as to intersect the axis of movement of the steel bar. Workers visually check the flaw area markings placed during the process.
The operating direction of the driving wheel is selected and brought into contact, and the round steel bar to be treated is advanced, retreated and rotated, and the contact between the rotary grindstone and the surface flaws of the round steel bar to be treated is maintained uniformly to eliminate the flaws. I decided to delete it and set it to 5.

In the present invention, the round steel bar to be processed is moved from the material supply zone to the flaw removal zone by a drive mechanism disposed in the material supply section, and then moved under the control of the drive section in the eaves removal zone. , when the round steel bar to be processed is moved by the drive unit in the flaw removal zone, the drive unit in the material feeding zone is stopped,
In accordance with the grinding operation for surface flaws, the drive section in the eaves removal zone can be selected between the axial direction and the circumferential direction. This driving operation is performed by selectively moving the required drive wheel up and down in accordance with the grinding conditions.

In the present invention, as an apparatus for carrying out such a method, the material feeding section of the round steel bar to be processed in the feed zone and the processing guide section in the eaves-taking shear are connected in a straight MK to prevent defects. In the removal zone, a grinder is installed so as to intersect with the direction of movement of the material to be processed, and the front and back positions of this grinder have a driving force that can be selected to drive the material to be processed in a straight line or in rotation. The workpiece guide section has a pair of support blocks with rotatable balls arranged at a required pitch. The structure is such that the support interval can be expanded or contracted according to the diameter of the material to be processed, and each drive wheel is suspended from a support frame VCG hydraulic cylinder so as to be able to move up and down, and the rotary grindstone of the grinder is It is attached to the end of the swing arm so that it can be pressed against the surface of the workpiece/material only during grinding, and each drive wheel and rotary grinding wheel can be switched by a switching operation in the operating pressure fluid control unit to perform flaw removal work. It is set up in

The driving wheel in the device of the present invention is attached to the lower part of the movable frame so as to be independently driven by a motor and can be moved up and down correctly by a hydraulic cylinder along a guide shaft provided along the frame. Furthermore, a vertical shaft is directly connected to the upper end of the hydraulic cylinder that suspends the movable frame so that it can move up and down by a gear drive machine that can change direction, such as a bevel gear reducer. The stationary frame VCK is such that the moving vehicle and its support are supported. In order to operate the gear drive machine, it is connected so that it can be moved up and down by an operating shaft with a universal joint interposed therebetween.

As a drive device using this drive wheel, a motor-single drive type drive wheel is used as a set, one for straight movement and one for rotating the material to be processed, and either one is selected depending on the situation and brought into contact with the material to be processed. A method to make it happen. Alternatively, there is a method in which a drive wheel is attached to the lower part of a suspended movable frame so that it can be rotated in 900 directions, and the direction of rotation of the drive wheel is selectively switched by remote control to operate the material to be processed.

In order to selectively operate the fluid pressure operating cylinders of each part, the control unit is equipped with a switching valve that can be switched by a single lever, and the pressure source and piping to each operating cylinder are connected through this switching valve. It is.

Embodiment: Hereinafter, the present invention will be described in detail with reference to the drawings regarding one embodiment.
In the next passage, Ao.
At the final position of the conveyor (3), the round steel bars Q sent out by the conveyor (3) are distinguished between non-defective products with no defects and products with surface defects that require maintenance. The material is sorted by a cox conveyor (2) to the feeding zone (1) for the eaves removal device. Material supply zone (1
) to be processed (hereinafter simply referred to as round bars)
The material feed conveyor (4) (roller table) one by one
The material to be treated is taken out upward and connected in a straight line with the vaginal conveyor (4) by a member for guiding the material to be treated. A flaw removal zone (5) is provided adjacent to this material supply zone (1). In this flaw removal zone (5), a grinder (1) is placed in the middle position, and in front and behind the grinder (1), a drive wheel (to) that drives the round steel bar forward and backward, its support mechanism, and a round steel bar are installed. A driving device including a rotationally driven driving wheel α◆ and its support mechanism is provided respectively. These drive devices move the round steel bar in the flaw removal zone (5), and the flawed round steel bar is sent out (at -L, the drive M of the material supply conveyor (4) is moved to the flaw removal zone (5). ), the tip of the round steel bar (2) is fed to the position of the drive wheel (to) located closer to the material feeding side, and the end of the round steel bar (2) is connected so as to stop when it is under the control of the feed drive by the drive wheel (to). Therefore, it is sufficient to transport the object by a distance l.

The round steel bar (6) drive device OQ in the flaw removal zone (5) has a configuration as shown in FIGS. Before and after part (b)! IC (with respect to the traveling direction of the round bar), the drive wheel (2) for straightly advancing the round bar, its support means (b), the drive wheel α◆ for rotating the round bar, and its supporter R stripes are arranged. Two sets of these are placed in symmetrical positions at appropriate intervals before and after the grinder (see Figure 1) (the arrangement does not necessarily have to be symmetrical. The minimum length of the steel bar (The receiver should be arranged so that it can be passed by the front and rear drive devices.)

Round bar steel drive unit αU! At the position directly below each of the driving wheels αj, α→ and the position directly below the rotating grindstone (described later) of the grinder (to), a V block is formed with a portion of balls 4 internally installed as a workpiece guide support part (1). A pair of support and support pieces for supporting and supporting the lower half of the round steel bar (2) are arranged symmetrically. These support pieces (A) □□□ are arranged on the stand (C) at right angles to the direction of movement of the round steel bar by means of a guide groove m Ic G that connects the female screw thread attached to the lower part of the support body (C). Through the screw s and -shaft PJ4, which are equipped with both left and right screws, the conditions for supporting the round steel bar by the ball (to) on the support arm (2) can be adjusted according to the diameter of the round steel bar. It is.

The system screw shaft (A) can be operated manually or with a line shaft and driven all at once by an electric motor using bevel gears, etc.

The driving vehicle for straight travel (to) is connected to the hanging shaft from the vertical shaft operation gear box (to) provided at the upper rear side of the stationary frame (b) via the drive operation cylinder αη directly connected to the lower end of the vertical shaft. It is supported at the lower end of a movable frame that can be lowered,
It is directly connected to a motor (not shown) via a universal shaft. The movable frame is equipped with guide tubes on both its wings, and the fixed frame αD is attached to a supported guide shaft (A-F), and the cough guide tube I is slid onto the guide shaft to vertically guide vertical movement. At the upper end of this movable frame ^ (to), the pin i is connected to the 7-orc single plow attached to the piston rod of the driving operation cylinder 0η, and the cylinder α
When the piston rod η protrudes, the drive wheel (to) comes into contact with the upper surface of the round steel bar (2) supported by the balls (supports) of the support pieces (2) (2), and the round It is arranged so that it runs straight through the steel bar (2).

The rotating drive wheel α In the same way as means (2), the movable frame (G) is attached to the guide shaft 4.
A round steel bar that is guided by the barge and is supported by the support piece @4 ball (to) by the foot so that it can be operated directly with the piston put of the drive operation cylinder (b), and by the attached motor. (4), so as to abut in the circumferential direction. In addition, the gear box (to) which is substantially suspended and supported is fixed at the top of the subframe I, and the vertical axis 0
・The upper end of the cylinder α force is connected to the lower end of the cylinder.

When the diameter of the round steel bar (4) to be treated is changed greatly, the vertical axis of each driving vehicle (to) α◆ is 0.
The threaded part (not shown) provided on the Qα groan and the gear box (
At the threaded part with the female screw (not shown) located inside the gear box (from), connect the deceleration power transmission section connected to the direct connection shaft (15) from the outside of the gearbox (from) to the handle α (E). By rotating the female screw, the vertical axis an (to) is moved up and down in synchronization, and the position of the drive wheel (to) α◆ is set.

The grinder located between the two sets of round steel drive devices 6166 is configured as shown in FIG. It is arranged in the direction. The rotating whetstone (to) is the base (b)
An axis i is supported at the tip of the swing arm (support) which is supported by the main section at the upper end of the support frame (support) installed above, and the upper end of the main section of the swing arm is A motor (a) mounted on a motor pedestal (a) drives the shaft i so that the rotary grindstone (a) rotates at high speed. This swing arm (to) has a piston rod i end of a pressurizing operation cylinder (to) that applies a downward force to the rotary grindstone ■ on the rear end side, with the support bottle as a reference, through a fork piece. It is a pin (to) connection.

In addition, an operating cylinder (b) for lifting the rotary grinding wheel is arranged between the swing arm (to) and the base (b) in front of the support bin position, and the piston rod end is connected to the fork. The bin is connected to the bracket attached to the arm through the piece. These two operating cylinder members (b) are
Both cylinders are single-acting, and as the piston of one cylinder moves forward, the piston of the other cylinder moves backward.

The cover (
Dust exhaust duct (1) covered with a cover (to) and connected to the cover (to)
to the side so that grinding dust can be collected in a container and disposed of.

The cylinder α-α force of Qα6 is applied to each drive device in the above-mentioned scratch removal zone (5), and the arm of the grinder (1))
To operate the operation cylinders (to) and (b), the operator visually inspects the mark indicating the flaw removed part placed on the round steel bar after flaw detection at the position immediately before the grinding position, and then presses the mark using one lever, for example. Work is accomplished by selectively switching the valves that supply or discharge pressure fluid to the operation cylinders of each part using a control switch (not shown) that can be operated to change forward, backward, or reverse rotation.

Therefore, when the round steel bar to be treated is fed from the material feeding section to the flaw removal zone (5) by the material feeding conveyor (4) of the material feeding zone (1), the linear drive wheel ( ) is lowered and comes into contact with the round bar steel prisoner, by giving a command to the motor (a) that the drive wheel (to) rotates in the normal direction, the round bar steel prisoner will rotate between this drive wheel (to) and its direct rotation. It moves forward while being correctly supported by the pair of support pieces (2) of the guide support part (1) located below (into the built-in ball). At this time, if the surface flaw is on the surface directly above the round steel bar, the round steel bar will move straight due to the rotational force of the straight drive vehicle.

Note that, except during grinding work, the rotary grindstone (to) is pulled up to the standby position (indicated by the chain line).

When the worker approaches the marked point directly below the grinding wheel (to), the cylinder connected to the rear end of the swing arm (to)
, lower the tip of the arm, and lower the tip of the arm to the rotating grindstone (
(b) is brought into contact with the location of the flaw on the round steel bar. Then, it is made to move straight while grinding the required range of the core flaw, and when it reaches its final position, the linear drive wheel (to) is pulled up once to stop the progress of the round steel bar, and at the same time, the rotary grindstone (b) is moved to the final position. The cylinder connected to the front side of the swing arm (2) (
(b) causes it to rise above the grinding surface. Next, if the rotating driving wheel α◆ is rotated forward or backward and brought into contact with the round bar steel surface, the rotational force of the driving wheel α◆ will cause the round bar steel (
2) rotates at the stop position. At this time, similar to the conventional manual grinding operation, first use a comb so that the adjacent part of the part to be ground can be ground, and then instead of pulling up the rotary drive wheel A4, reverse the linear drive wheel (to). However, when it comes into contact with the round steel bar again, the round steel bar retreats and grinds into a straight line. When the movement of the stroke is completed, the linear drive wheel α3 and the rotation drive wheel α◆ are switched again in the same manner as described above, and the rotation angle is rotated appropriately, and thereafter, the paddle and grinding necessary for eaves removal are performed. When removing scratches in step 5 in this manner, if you make sure that the amount of grinding with the whetstone does not become excessive and reduce the width of grinding in one step, you will be able to remove the surface with a gentle curve rather than an angular one. can.

If the flawed part of the fed round steel bar is not facing upward, the operator, after visual confirmation, brings the rotating drive wheel α of the drive device αQ into contact with the round bar prison VC, so that the part that requires grinding is facing upward.
Rotate until it is. After that, it is moved straight and ground in the same manner as described above.

After performing the eaves removal work in this manner, the round steel bar (4)
When most of the part moves forward from the grinding position, the drive device α6 on the exit side moves the round steel bar (4),
The drive device 1αQ on the inlet side is kept inactive during this period.

When the round steel bar (2) that has been subjected to the flaw removal work in this manner is sent out from the eaves removal zone (5), it is transferred to the wood collecting section (6).
).

The above description has been made on the case where the processing material drive device has a set of linear drive wheels and rotation drive wheels. 90 drive cars
It is also possible to use a device that can perform the same operation as above by converting in the 0 direction.

To explain this embodiment, the round bar steel drive device 0A has a vertically operated gear box (
A drive wheel support bracket (6) is attached to the lower end of the movable frame (6), which is suspended from the lower end of the vertical axis
) is attached, and the drive wheel h'4 directly connected to the deceleration motor is supported by the force of this support bracket α. The support bracket (B) has an arm ■ projecting sideways, and a cylinder for switching operation whose base end is pivoted to the part protruding sideways from the bracket (G) provided at the lower end of the movable frame (C). (
The piston (b) end of the piston (b) is connected to the arm (b), and the arm (b) is actuated by the operation of this cylinder (b).
(b) is rotated approximately 90 degrees, and this switching cylinder is controlled by the operator to remove defects, and the driving wheel is rotated approximately 90 degrees depending on the direction in which the round steel bar (4) is to be moved. 'Change direction and move straight or rotate with one drive vehicle. Of course, if the pressing force by the driving operation cylinder (b) is released, no driving force is applied to the round steel bar (A)K.

In addition, in the case of the above-mentioned method, the direction of the moving vehicle can be changed by not only the shifter, but also the interlocking drive of an electric motor or the like without any discretion.

In addition, even if the round steel bar to be processed is moved in the flaw removal zone, even if the round steel bar is distorted, the drive wheel that applies the moving force is given a pressing force by the operating cylinder using pressurized fluid. It responds immediately to vertical displacement due to strain, moves without stagnation, and does not interfere with work.

Effects of the Invention: According to the present invention, the operator rotates the grinding point of the material to be processed while visually checking the marking part attached to the detection point of the eaves part in the flaw detection process just before the grinding position. By arranging the grinding wheel so that it faces the grinding wheel so that the grinding operation can be performed, it can be semi-automated, making it possible to remove scratches efficiently with a minimum number of personnel.In addition, compared to fully automated equipment, the equipment is simpler. This reduces equipment costs and enables careful machining by visually observing the part to be ground.

In addition, when driving by sandwiching each drive wheel and the support block, the drive wheels are designed to come into pressure contact with the material to be processed by a hydraulic cylinder, so the drive wheels follow the bending and distortion of the round steel bar. It gives you strength and allows you to accomplish the desired task without hindrance.

[Brief explanation of the drawing]

Fig. 1 is a layout diagram of equipment for carrying out the method of the present invention, Fig. 2 is a front view of the processing material drive device, Fig. 3 is a partially sectional side view showing the processing material guide section, and Fig. 944 is a grinding side view of the device,
FIG. 5 is a diagram of another example of the drive device, and FIG. 6 is a view taken along the line 1--2 of FIG. (1)...Material supply zone (2)(A)...Transverse transport υ conveyor (4)...Material supply conveyor (roller day i)
+L) (5)...Damage removal zone (6)...Gathering lumber
Part α0αa... Round bar steel drive device (b)...
Stationary frame (6)...Straight drive main support means 0 pier...Round bar steel straight drive vehicle (6)...Rotation drive vehicle support means (b)...Round bar Lg1 diversion drive 11L
CI・°・・・Vertical shaft required・Vertical shaft operation gear box (17)・Cylinder for driving vehicle operation (To)・Movable frame required・Guidance m qra…Guy Shaft (E)...Processed material guide support part (2)...
・Stand 4...Support piece ■...Ball (C)...Support (To)...Screw shaft (E)...Female thread (To)...Support frame (To) )...Grinder (Foundation)...
・Rotary grindstone (to)...Swing arm (to)・
... Pressure operation cylinder i ... Grinding wheel shaft @ Bracket (b) ... Lifting operation cylinder ... on the rotating vertical shaft) ... on the drive body)
・・Deceleration motor・・・Arm Yu・・・・
Switching cylinder...bracket (4)
・・・Round Bar Steel Steel Takigawa Kogyo Co., Ltd.

Claims (1)

[Scope of Claims] 1. When removing surface flaws from a round steel bar, the material to be treated is moved from the material feeding zone to the area under the control of the driver in the eaves removal zone by a material feeding machine, and in the flaw removal zone, the material to be treated is A drive device equipped with a drive wheel that selectively moves the processed material forward and backward in the direction of movement of the processed material relative to the rotary grindstone of the grinder, which is disposed so as to be vertically movable across the movement axis of the processed material. is arranged, and an operator visually recognizes a flaw display mark made in the flaw detection process on the workpiece being fed by a material feeder, and selects the operating direction of the drive wheel in the drive device,
A method for removing surface flaws on a round steel bar, characterized in that the drive wheel moves the workpiece forward and backward and rotates the workpiece, and the surface flaw mark portion and its vicinity of the workpiece are sequentially removed using a rotary grindstone. 2. In an apparatus for removing surface flaws from a round steel bar, the material feeding machine in the material feeding zone of the material to be treated and the material guide section in the flaw removal zone are connected in a straight line, and in the flaw removal zone, A grinder is disposed so as to intersect with the direction of movement of the material to be processed, and at the front and rear positions of the grinder in the direction of movement of the material to be processed, driving force is selectively applied to the material to be processed, either linearly or rotationally. Each drive device is provided with a drive wheel suspended from a support frame above the material guide section via a hydraulic cylinder, and the material guide section is rotatably mounted on a ball. A pair of support blocks marked with are arranged at a position facing at least each of the driving wheels and the rotary grindstone of the grinder, and the support interval of each support block pair can be expanded or contracted according to the diameter of the material to be processed. The rotary whetstone of the grinder is attached to the swing arm so that it is pressed against the workpiece only during grinding, and each drive wheel and rotary whetstone can be selectively operated by hydraulically operated cylinders specially installed in each part. A surface flaw removing device for round steel bars connected to a control mechanism.