JPH076980Y2 - Square steel pipe cutting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a rectangular steel pipe cutting hole straightening device for correcting deformation of a cutting hole that occurs when a rectangular steel pipe is die set.

[Prior Art] When a die set is used as a cutting device for cutting a rectangular steel pipe into a predetermined length in a rectangular steel pipe production line, a fixed blade cannot be arranged inside the pipe, and therefore the cutting port is indicated by a solid line in FIG. Deformation occurs as shown. In the figure, the two-dot chain line shows the original rectangular cross section in the middle of the length direction of the rectangular steel pipe. In order to correct this deformation of the cutting mouth, conventionally, a tool has been used to manually repair each piece.

[Problems to be Solved by the Invention] The above-mentioned manual repair work is not easy, requires a large number of man-hours, and the accuracy of correction is not uniform. In view of such circumstances, under the applicant of the present invention, a wedge is attached to the upper end of an arm that rotates around the lower end, and this arm is rotationally driven by a cylinder to press the wedge into the cutting opening of the steel pipe. We devised a cutting edge straightening device for online straightening of the configuration,
I filed a utility model registration application (see Japanese Utility Model Application No. 62-139074).
This straightening device solves the above problem, but since the wedge is attached to the rotating arm, the stroke of movement of the wedge is slightly long, and in addition to the fact that a cylinder is used, the straightening operation is somewhat It takes time. Since it is an online straightening device, it is desirable to process it in a shorter time in consideration of the case where products are successively sent in a short time cycle.

The present invention has been made in view of the above circumstances, does not require difficult manual reworking work, enables efficient and accurate correction, and even when the time cycle of online correction is extremely short. It is an object of the present invention to obtain a square steel pipe cutting mouth straightening device which can be easily dealt with.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a positioning device for positioning a rectangular steel pipe laterally fed by a horizontal feed conveyor at a predetermined position, and a rectangular steel pipe positioned by the positioning device. Of the rectangular steel pipe by horizontally driving the wedge through a straightening drive arm connected to the eccentric portion of the eccentric shaft by rotationally driving the eccentric shaft. A wedge horizontal drive mechanism press-fitted into the cutting opening is provided.

[Operation] In the above configuration, the laterally fed rectangular steel pipe is positioned at the correction position by the positioning device. Then, the eccentric shaft is rotated by being driven by a motor, etc., and the wedge attached to the tip of the correction drive arm connected to the eccentric part of the eccentric shaft is horizontally driven forward to press-fit into the cut end of the rectangular steel pipe. The deformation of the cutting edge is corrected to the original shape.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

FIG. 1 is a schematic configuration diagram showing almost the entire refining device of a rectangular steel pipe manufacturing line that employs the rectangular steel pipe cutting hole straightening device of one embodiment of the present invention, and FIG. 2 is a plane near the rectangular steel pipe cutting straightening device. In the figure, reference numeral 1 is a transverse feed conveyor for laterally feeding a square steel pipe (hereinafter also referred to as a product) P that is ejected from a run-out table (not shown) of a pipe making machine. The arrows in the figure show the flow of products. Reference numeral 2 is a single-taker device having a product stopper 4 that moves up and down by a hydraulic cylinder 3, and 5 is a receiving-side transfer device. 6 is a mobile straightener 6A and a fixed straightener 6B
A square steel pipe cutting mouth straightening device according to an embodiment of the present invention, which comprises: and a positioning device 7 for positioning and holding the square steel pipe at a predetermined position. Reference numeral 8 denotes an unloading-side transfer device for unloading the straightened rectangular steel pipe. In the figure, L is the center line of the receiving side transfer device 5, M is the center line (correction position) of the straightening device 6, and N is the center line of the unloading side transfer device 8. Further, 9 is an inclined conveyor for receiving the rectangular steel pipes from the unloading side transfer device 8, 10 is a discharge lateral feed conveyor, and 11 is a product stacking device using a lifter.

Details of the square steel pipe straightening device 6 will be described with reference mainly to FIGS. 3 to 6. First, the movable straightening machine 6A will be described. In the straightening position, 12 is a moving carriage capable of reciprocating in the product length direction (direction orthogonal to the paper surface in FIG. 1, vertical direction in FIG. 2). A frame 13 is fixed on a carrier 12 and a straightening motor 14 and a hydraulic cylinder 15 for clamping are installed on an upper surface 13a of the frame 13 to move the carrier.
Timing pulleys 16, 1 on the 12 by the correction motor 14
An eccentric shaft 19 that is rotatably driven via a 7 and a timing belt 18 is rotatably provided by a bearing 20, and a correction drive arm 21 is rotatably connected to an eccentric portion 19a of the eccentric shaft 19 as shown in FIG. The straightening sliding member 22 is connected to the tip of the straightening driving arm 21 via the connecting pin 21a. Three wedges 23 each having a pyramid-shaped tip matching the cross-sectional shape of the rectangular steel pipe are fixed to the wedge mounting plate 22a of the straightening sliding member 22 at equal intervals. In addition, a horizontal ridge guide 22c is provided on the side surface portion 22b of the straightening slide member 22, and the ridge guide 22c is provided on the side wall portion 13b of the frame body 13 as a guide member 24. Sliding member for correction 2
The 2 slides exactly horizontally. Also, the piston rod 15 of the clamp hydraulic cylinder 15
A clamp plate 25 is attached to a. 26 is a guide shaft for advancing and retracting the clamp plate 25.

In the moving carriage 12, the sliding member 27 provided on the lower surface is a rail.
The pinion is fitted to the 28 and is slidably guided in the product length direction, and is rotationally driven by the traveling motor 29 installed on the trolley via the sprockets 30, 31 and the chain 32.
33 engages with the rack 34 and is driven to travel.

Further, an end face aligning device 37 having an end face aligning plate 36 that moves forward and backward in the product length direction by a hydraulic cylinder 35 is attached to the side surface of the moving carriage device.

As shown in FIG. 3, the structure of the fixed type straightener 6B is such that the moving carriage 12 of the movable type straightener 6A is fixed.
39 except that there is no end aligning device 37,
Since it is basically the same as the mobile straightener 6A, the same symbols are given to the same portions and the repetitive description will be omitted.

A mechanism for receiving the rectangular steel pipe in the straightening device 6, positioning it in the straightening position, and carrying it out after straightening will be described. In FIG. 6, the receiving side transfer device 5 is provided with a drive shaft 40 in the product length direction via a slide key. It is equipped with a carriage 42 having a rack 42a that engages with a pinion 41 attached as a bottom surface, and three air cylinders 43, which are lifting mechanisms, are installed on the carriage 42 at equal intervals in the lateral feed direction. The structure is such that a horizontal L-shaped stopper / support member 44, which has a stopper function for stopping the positioning of the product of the piston rod of the cylinder 43 and a support mechanism for supporting the product in that state, is attached. The center line L of the receiving side transfer device 5 coincides with the center position of the end face aligning device 37. Further, the above-mentioned positioning device 7 provided in the straightening device 6 has the positioning member 46 for placing the three products on the piston rod of the air cylinder 45 according to the intervals of the three wedges 23 of the straightening machines 6A and 6B. It is the attached structure. In addition, the unloading side transfer device 8 is a pinion 48 which is also attached to a drive shaft 47 in the product length direction via a slide key.
A tilt table 51 is provided, which has a carriage 49 having a rack 49a that engages with the bottom surface, and is rotatable around the fulcrum shaft 50 on the carriage 49, and a hydraulic cylinder for tilt drive that rotates the tilt table 51. 52 is provided, and this tilt base 51
Three air cylinders 53, which are lifting mechanisms, are installed at equal intervals in the lateral feed direction, and the square steel pipes on the positioning member 46 of the positioning device 7 are taken out from the piston rods of each air cylinder 53. Horizontal L-shaped take-out member
54 is the attached structure. Although detailed illustration is omitted, the transfer devices 5, 8 on the receiving side and the unloading side are shown.
Of the two units on the side of the mobile straightener 6A shown in Fig. 2 (indicated by 5'and 8'in brackets), the product length is adjusted so that the length of the square steel pipe fed laterally can be accommodated. It is made movable in the direction. That is, each transfer device 5,
Eight carriages 42 and 49 are slidable in the product length direction. Therefore, as described above, the pinions 41 and 48 that engage with the racks 42a and 49a are slidable with respect to the drive shafts 40 and 47 by the slide key.

Next, the operation will be described. The rectangular steel pipe that has been sent in the vertical direction from the run-out table (not shown) of the pipe making machine is kicked out to the transverse feed conveyor 1, is fed in the horizontal direction on the transverse feed conveyor 1, and is stored by the single picking device 4. One by one while being sent. The three air cylinders 43 of the receiving side transfer device 5 operate to sequentially raise the stopper / support member 44 before the square steel pipe P is sent, and the square steel pipes sent one by one are moved to the raised position. Positioning is sequentially stopped by a stopper / support member 44. When the three square steel pipes ride on the stopper / support members 44, the hydraulic cylinder 35 of the end face aligning device 37 operates and the end face aligning plate 36 advances to align the end faces of the three square steel pipes. Then, driven by the pinion 41 that meshes with the rack 42a, the carriage 42 advances to the downstream side in the transverse feed direction (to the right in FIG. 6) and stops at a position that coincides with the center line M of the straightening device, and then the positioning. The air cylinder 45 of the device 7 operates to raise the positioning member 46, and the three rectangular steel pipes are placed on the positioning member 46 and positioned. The stopper / support member 44 descends and the carriage
42 returns to the original position L. Then, the hydraulic cylinder 15 for clamping operates and the clamp plate 25 descends,
Clamp the square steel pipe to and from 38. In this state, the eccentric shaft 19 of each straightening machine 6A, 6B is driven by the straightening motor 14 to rotate, and the driving sliding member 22 connected to the tip of the straightening driving arm 21 connected to the eccentric portion 19a. Moves in the horizontal direction (product length direction), the wedge 23 is pressed into the cutting opening of the rectangular steel pipe P, and the deformation of the cutting opening is corrected according to the shape of the wedge 23. This straightening operation is performed by simultaneously operating both straightening machines 6A and 6B.

Since the above-mentioned straightening operation is performed by press-fitting the wedge 23 matching the original cross-sectional shape of the rectangular steel pipe, straightening is performed with good accuracy without variation. Further, since it is a mechanism for rotating the eccentric shaft 19 to drive the correction drive arm 21 to drive the wedge 23 in the horizontal direction, the stroke of the wedge 23 is small, and coupled with the rotational drive by the motor, Corrective action is quick.

Transfer device 8 on the unloading side when the above correction operation is completed
Is located at the position of the straightening device center line M, the air cylinder 53 is actuated, the take-out member 54 is raised, and the three rectangular steel pipes on the positioning member 46 are received, and then the carriage 49 is moved to the pinion 48. Driven by the rack 49a to move to the downstream side in the lateral feed direction. Then, the tilt hydraulic cylinder 52 is activated to rotate the tilt base 51 about the fulcrum 50 and incline. Then, the air cylinders 53 are sequentially operated one by one, and the take-out members 54 are sequentially lowered to form a rectangular shape. The steel pipes are sequentially dropped one by one onto a chute 55 and slid, and sent to the inclined conveyor 9. The tilt type conveyor 9 is a horizontal feed conveyor for discharging square steel pipes while preventing slippage with the slip prevention claws 9a.
Moving to 10, the rectangular steel pipes are sent by the discharge lateral feed conveyor 10 and sequentially stacked on the stacking device 11 by the lifter to form a bundled load.

In addition, when the length of the square steel pipe sent is changed,
The traveling motor 29 of the mobile straightener 6A is operated, and the traveling cart 12 is driven by the traveling drive mechanism including the rack 34 and the pinion 33.
Is moved in the product length direction to position the mobile straightener 6A at a predetermined position according to the product length, and if necessary, the transfer device 5 of the receiving side transfer device 5 and the transfer side transfer device 8 is movable. Two movable units (5 ',
8 ′) is moved in the product length direction. Further, when the size of the rectangular steel pipe is changed, if necessary, the stopper / support member 44 of the receiving side transfer device 5, the positioning member 46 of the positioning device 7, and the take-out member 54 of the unloading side transfer device 8 are predetermined ones. To replace.

[Effects of the Invention] As described above, according to the present invention, the wedge arranged so as to face the cutting opening at the end of the rectangular steel pipe is horizontally driven by the rotation of the eccentric shaft via the correction drive arm. Since it is configured to be press-fitted into the cutting edge of the rectangular steel pipe, it is possible to correct the cutting edge of the rectangular steel pipe efficiently and accurately, and it is not necessary to manually perform difficult reworking work. Further, the correction operation is quick, and it is possible to easily cope with the case where the time cycle of online correction is extremely short.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing almost the entire adjusting device of a square steel pipe manufacturing line adopting the square steel pipe cutting device according to one embodiment of the present invention, and FIG. 2 is a plane near the same rectangular steel pipe cutting device. Fig. 3 is a front view of a square steel pipe cutting straightening device, Fig. 4 is a view of the mobile straightening device in the direction of arrow IV in Fig. 3, and Fig. 5 is a plan view of a partial cutout of the mobile straightening device. FIG. 6 is a side view of a transfer device and the like, and FIG. 7 is an explanatory view of deformation of a cutting opening. 1 ... Lateral feed conveyor, 5 ... Receiving side transfer device, 6 ... Square steel pipe cutting hole straightening device, 6A ... Mobile straightening device, 6B ... Fixed straightening device, 7 ... Positioning device, 8 ...
Transfer side transfer device, 19 ... Eccentric shaft, 19a ...
… Eccentric part, 21 …… Straightening drive arm, 22 …… Straightening sliding member,
23 ... wedge, 42, 49 ... carriage, 43, 53 ... air cylinder (elevating mechanism), 44 ... stopper and support member, 54 ... take-out member.

Claims (2)

[Scope of utility model registration request] 1. A positioning device for positioning a rectangular steel pipe laterally fed by a lateral feed conveyor at a predetermined position, and a wedge arranged so as to face a cutting port at an end of the rectangular steel pipe positioned by the positioning device. A wedge horizontal drive mechanism for rotating the eccentric shaft to horizontally drive the wedge through a straightening drive arm connected to an eccentric portion of the eccentric shaft to press-fit the wedge into a cutting edge of the rectangular steel pipe. Characteristic square steel pipe cutting edge straightening device. 2. A carriage which reciprocates back and forth in the lateral feed direction between the straightening position and an upstream side in the lateral feed direction, a lift mechanism provided on the carriage, and an upper part of the lift mechanism. A receiving-side transfer device having an attached stopper / support member is provided, and a carriage that reciprocates back and forth in the transverse feed direction between the correction position and a transverse position in the transverse feed direction is provided on the carriage. The rectangular steel pipe cutting straightening device according to claim 1, further comprising a transfer-side transfer device including an elevating mechanism provided and a take-out member attached to an upper part of the elevating mechanism.