JPH0321841Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention is an internal deburring device that automatically removes burrs generated around the inner diameter of the end of a pipe that has undergone a saw blade cutting process while being conveyed to a cooling bed. It is related to.

(b) Prior Art Pipe cutting performed on a forge-welded pipe manufacturing line is usually done by saw blade cutting, which results in burrs at the pipe end after cutting.

Conventional methods for removing burrs include, in addition to a wide conveyor line for cooling the pipe, a process for holding the pipe fixed, and a special machine that rotates the pipe or tool while chucking the pipe. Then, deburring was carried out. Therefore, there is a drawback that a large amount of installation space is required for the dedicated equipment, and the equipment cost increases accordingly.

(c) Problems to be solved by the invention The problem to be solved by the invention is to obtain a device that deburrs the material pipe while it is being conveyed through the cooling bed and while the material pipe is still in a warm state. Then,
The aim is to improve the efficiency of downstream processes and reduce equipment costs.

(d) Means for solving the problem The pipe inner surface deburring device of the present invention is a pipe feeding mechanism consisting of a plurality of parallel feeding shafts each having spiral fins on the outer circumferential surface. At one position, the spiral fins are changed to right-angled fins that are parallel to the shaft cross section only in a certain angular range on the outer circumference of the shaft, and the fins are continuously formed, so that the conveyance is stopped by the amount of the right-angled fins during one revolution of the feed shaft. The pipe feed device has a pipe feeding device, a clamper that is movable up and down above the conveyance stop position and positions and fixes the temporarily stopped pipe, and a conical rotary cutter that moves forward and backward in the horizontal direction toward the end of the material pipe. A burr cutting device is installed symmetrically on both sides of the conveyance stop position, and a pipe end face alignment device is installed symmetrically on both sides of a position upstream of the conveyance stop position to position the end face line of the material pipe to be fed to the burr cutting position. The above problem is solved by providing a guide and a pipe detector that detects the material pipe just before it enters the conveyance stop position and instructs the clamper and burr cutting device to operate.

(e) Embodiment The inner surface deburring device of the present invention includes a screw-type pipe conveying device 1 in which a part of the conveying fin is provided with a temporary stop function, and a clamper for positioning the pipe provided above the temporary stop position. 2, a burr cutting device 3 installed corresponding to the temporary stop position, a pipe end face alignment guide 4 that positions the end face line of the conveyed material pipe, and a pipe that detects the entry of the material pipe and instructs each device to operate. The main parts are a detector 7 and a device for collecting burr debris after removal.

The pipe conveyance device 1 uses a screw-type conveyance device known as a cooling bed as its basic structure, and has a plurality of feed shafts 11 provided with spiral fins 12 on the outer peripheral surface combined in parallel. By synchronously rotating the feed shaft 11 with
It has a function of receiving and conveying the pipe 8 passed in the direction perpendicular to the screw into the valley of the screw. Since the winding angle of the helical fin is loose and constant, the pipe is fed slowly at a predetermined speed without stopping, ensuring a constant cooling time.

In the present invention, the shape of the helical fin 12 on the feed shaft 11 is partially changed so that it does not have a feeding function. That is, as shown in FIG. 2, one predetermined position of the feed shaft 11 is determined, and the fins at that position are not spiral-shaped but are formed as right-angled fins 13 parallel to the axial cross section of the feed shaft. The right angle fins 13 are provided only at a predetermined angle portion for one revolution of the feed shaft, and their starting and ending ends are continuous with the front and rear helical fins 12 and 14.

This right-angled fin 13 is provided at the same position in the transport direction with respect to all of the plurality of feed shafts 11 forming the transport device 1, and this position is used as a transport temporary stop position.

A roller type clamper 2 as shown in FIG. 3 is provided above the temporary stop position. The clamper 2 presses the outer circumferential surface of the pipe 8 from two points in the circumferential direction to position it at a predetermined position.
It has a pair of rollers 21 that are raised and lowered by an air cylinder 22, and are arranged in two or three positions at a temporary stop position A, as shown in FIG.

A burr cutting device 3 is provided on both sides of the temporary stop position A. The burr cutting device 3, as shown in FIG.
A conical cutter 31 rotated by a motor 32 is disposed toward the end of the pipe, and the entire cutter moves toward the end of the pipe by the operation of a cylinder 33 and comes into contact with the end surface of the pipe. The contact time between the blade 31 and the pipe 8, that is, the cutting time, is extremely short, and is set to a short time of about 45 degrees in terms of the rotation angle of the blade. This temporary stop position A becomes the deburring position.

A device is provided downstream of the deburring position to remove burr debris that has been cut and remains in the pipe. This device is equipped with a burr blower 5 on one side of the conveying device 1 so that pressurized air can be blown into the pipe from one end of the pipe 8 being conveyed, and on the other opposite side. A burr collector 6 for receiving blown burr debris is also provided.

Upstream of the temporary stop position, pipe end face alignment guides 4 are provided which are arranged symmetrically in left and right pairs to position the end face line of the pipe being transported. This alignment guide 4 is movably fixed with an elastic mechanism such as a cylinder 41, and is designed to buffer and regulate the alignment of pipes that are being conveyed in irregular positions.

Furthermore, a pipe detector 7 is provided immediately before the upstream side of the temporary stop position A. The pipe detector 7 is a photoelectric detector in which a light-emitting part and a light-receiving part are arranged in pairs on the left and right, and it detects the pipe just before it enters the temporary stop position, and immediately connects the clamper 2 with the burr cutting part. It is designed to command the device 3 to operate.

(F) Operation The operation of the device of the present invention will be explained step by step. In the cutting process, the pipe 8 cut to a fixed length is transferred onto the feeding device 1 and sequentially conveyed in the direction of the arrow as the spiral fin 12 rotates. At the position of the guide 4, the positions of both ends of the pipe are first aligned along a predetermined line, and the pipe continues to advance while maintaining this state.

Eventually, when the position just before the temporary stop position A is reached, the pipe detector 7 detects the arrival of the pipe and sends an activation signal to the clamper 2 and the burr cutting device 3. Immediately after the pipe 8 is detected by the detector 7, it reaches the position where it engages with the right angle fin 13, and remains at that position without forward feeding operation only while the feed shaft 11 rotates by the angle at which the right angle fin is provided. Stop.

When the pipe 8 stops on the feeder 1, the air cylinder 22 of the clamper 2 is activated by a command.
The clamp roll 21 descends to position and fix the pipe 8 at the deburring position. At the same time, the cylinder 33 of the burr cutting device also operates, and the conical blade 3
1 is advanced toward the end surface of the pipe, contacts the inner edge of the pipe with a predetermined pressure force, and rotates by a predetermined angle, thereby quickly removing burrs on the end edge. The cutting time of the conical blade 31 is extremely short, and cutting is performed simultaneously on both the left and right ends.

When the burr removal is completed, the burr cutting device 3 immediately retreats from the pipe end, and almost at the same time, the clamper 2 also rises to release the pipe 8. At this point pipe 8
is automatically inherited from the right angle fin 13 to the spiral fin 14 on the downstream side and begins to be conveyed again.

A series of operations such as temporary stopping, clamping, burr cutting, and clamp release performed at the deburring position described above are performed within an extremely short period of time in which the feed shaft 11 rotates through the right angle fin attachment range.

The pipe, which is conveyed again by the spiral fin 14, is engaged with the burr blower 5 during the conveyance, receives pressurized air from the burr blower 5, and burrs remaining in the pipe are blown out to the other side. The inside of the pipe is cleaned and transported further downstream.
The burr debris blown out from inside the pipe is collected in the burr collector 6 on the opposite side.

Although the above-mentioned operation was explained for one specific pipe, many pipes are continuously transferred onto the feeding device 1, and this series of deburring operations is repeated in sequence. This is done continuously.

(g) Effects According to the inner surface deburring position of the present invention, the deburring process, which was previously a separate process, can be added to the cooling bed conveyance process and performed during conveyance, improving work efficiency. It is extremely efficient and can significantly reduce equipment costs. In addition, since deburring can be carried out while the pipe is still warm, cutting resistance is reduced, and there are no burrs during transportation after the cooling bed, which prevents troubles caused by catching burrs. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a plan view schematically showing the overall structure of a pipe inner surface deburring device according to the present invention. FIG. 2 is a side view showing the form of the fins on the pipe feed shaft and the state of movement of the pipe. FIG. 3 is an explanatory diagram showing the clamper operation at the pipe stop position. FIG. 4 is a side view showing the operation of the burr cutting device during deburring. 1...pipe feeding device, 2...clamper, 3...
...Burr cutting device, 4...Pipe end face alignment guide,
5...Flash blower, 6...Flash collector, 7...
Pipe detector, 8...Material pipe, 13...Right angle fin.

Claims (1)

[Scope of utility model registration request] A pipe feeding mechanism consisting of a plurality of parallel feeding shafts with spiral fins provided on the outer peripheral surface, in which the spiral fins are continuously formed at a predetermined position on the feeding shaft by changing them into right-angled fins parallel to the shaft cross section. A pipe feeding device is configured to stop the conveyance of only the right angle fin portion, a clamper is provided above the conveyance stop position to position and fix the temporarily stopped pipe, and a clamper is provided above the conveyance stop position to position and fix the temporarily stopped pipe. There used to be a burr cutting device that had a conical rotary blade that moved forward and backward in the horizontal direction and was installed symmetrically on both sides of the transport stop position, and a burr cutting position that was installed symmetrically on both sides of a position upstream of the transport stop position. an inner surface of a pipe that is equipped with a pipe end face alignment guide that positions the end face line of the material pipe to be fed into the pipe, and a pipe detector that detects the material pipe just before it enters the transport stop position and instructs the clamper and burr cutting device to operate. Deburring device.