JPS6043413B2 - Rotating roller drive device in steel pipe immersion hardening equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotating roller drive device for a steel pipe immersion device, and in particular, a heated steel pipe is pressed and held by a rotating roller and a presser roller, and is lowered while rotating in the air to be immersed in water. The present invention relates to a rotary roller drive device that rotates the rotary roller around its roller axis while connecting the rotary roller so as to be able to reciprocate from the air to the water in a steel pipe immersion device.

One of the methods to make steel pipes high in tension and toughness is to use quenching and tempering treatments, similar to other steel products.

BACKGROUND ART Conventionally, as a method of quenching steel pipes, a method of quenching a heated steel pipe by immersing it in water has been known. In this case, if the steel pipe is simply dropped from the air into the water, there is a risk that the steel pipe will damage the bottom of the water tank or the cradle in the tank and scratch the outer surface of the steel pipe. Furthermore, even if a heated steel pipe is slowly immersed in water while being held with a suitable gripping device, the lower side of the steel pipe will cool first, causing uneven heating and bending. In order to solve this problem, the applicant first provided a set of rotating rollers close to each other and a set of presser rollers close to each other, and sandwiched a steel pipe between these two rollers. a steel pipe holding device that rotatably holds the steel pipe; a tilting device that pivotally supports the rotating roller and the press roller to perform a reciprocating turning operation from the air into the water tank; and a steel pipe held by the steel pipe holding device. a high-pressure water injection nozzle that is attached to the tilting device so as to be concentric with the tilting device and pivots integrally with the tilting device; a receiving arm that is rotatably held within the water tank; a circulating conveyor device extending outward, and the steel pipe after quenching is delivered underwater from the tilting device to the receiving arm, and further delivered to the conveyor device by rotation of the arm. Disclosed the crock device.

In this device, a plurality of pairs of rotating rollers and one set of pressing rollers are arranged in the axial direction of the steel pipe. The rotating roller is supported by a roller shaft extending in the longitudinal direction of the steel pipe,
The entire rotating roller turns from the air into the water tank while rotating together with the roller shaft. Therefore, a device for rotating the roller shaft around its axis is required, but it is virtually impossible to install all of this rotation drive device inside the aquarium in terms of smooth operation and maintenance of the device. At least the drive motor, transmission gear mechanism, etc. must be installed outside the tank. The present invention is applied to the above-mentioned copper tube immersion hardening apparatus, and provides a rotary roller drive device capable of driving the rotary roller to rotate about its axis from outside the water tank and to perform reciprocating rotation by the tilting device. The purpose is to Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view of a main part of an immersion hardening apparatus to which the present invention is applied.

Note that this figure was cut along a plane perpendicular to the longitudinal direction of the steel pipe set for hardening. First, the part that supplies the steel pipe to this immersion hardening apparatus will be briefly explained. The heated steel pipe 1 is conveyed along a conveyance line in the longitudinal direction (in a direction perpendicular to the plane of the drawing) by V-shaped conveyance rollers 2, and is stopped at the side of the quenching apparatus. A carry-in skid 4 and a jump arm 3' are provided on the side of the hardening device between the hardening device and the conveying line. The steel pipe 1 on the conveyor roller 2 is
It is scooped out onto a carry-in skid 4 by a jump-out arm 3, and rolled on this to be placed on a set of rotating rollers 9 of a steel pipe holding device. A set of rotating rollers 9 is a tilting roller installed above the water tank 11. It is rotatably supported by a lower tilting arm 7a via a roller shaft, and is rotationally driven by a rotary drive motor (described later). The set of rotating rollers 9 and the set of presser rollers 8 constitute a steel pipe holding device. A set of presser rollers 8
is rotatably supported at the tip of the piston rod 17 of the cylinder device 16. The cylinder device 16 is fixed to the tip of the upper tilting arm 7b of the tilting device. Above the tilting device. The lower tilting arms 7a and 7b are integrally fixed to the rotating shaft 6. The rotating shaft 6 is pivotally supported by the pedestal 5, and is configured to be reversibly rotated (reciprocatingly rotated) within a predetermined angular range by an electric motor (not shown) provided outside the water tank 11. Further, a jumping arm 10 as shown is attached to the lower tilting arm 7a. tilting arm 7a,
A plurality of rotating rollers 9 and pressing rollers 8 of 7b1 are provided along the longitudinal direction of the steel pipe 1 at appropriate intervals.
A high-pressure water injection nozzle whose position is adjusted so as to be coaxial with the steel pipe 1 on the rotation roller 9 is fixed to the shaft end of the rotation shaft 6 of the tilting device. Note that the high-pressure water injection nozzle does not appear in the cross-sectional position shown in FIG. A receiving arm 14 having a concave steel pipe receiving portion is supported in the water tank 11 so as to rotate within a predetermined angular range. In addition, there is a circulating conveyor device in the water tank 11 whose entire lower half is immersed in water in the water tank and only the upper part protrudes diagonally upward from the water surface 18.
It is set in. This conveyor device is constructed by, for example, an endless chain 20 wound around sprockets at both ends, and a plurality of steel pipe receiving hooks 19 attached to the outer surface of the chain at predetermined intervals. The endless chain 20 rotates in the direction of the arrow shown by the rotation of the sprocket.
Near the upper end of the conveyor device, an aerial conveyance device for quenched steel pipes is provided. An underwater skid 21 is provided between the receiving arm 14 and the conveyor device 15 for rolling a steel pipe carried out from the receiving arm 14 and passing it to the conveyor device 15. The rotary roller 9, which is pivotally supported by the lower tilting arm 7a of the tilting device via a roller shaft, is in the aerial position shown in the figure when it receives the steel pipe that has rolled on the carry-in skid 4, and is rotated from this position. As the shaft 6 rotates, it rotates in the direction of arrow A about the rotation shaft, immerses in water, stops near the upper limit position of the receiving arm 14, and rotates the rotation shaft 6.
It is designed to reciprocate between these areas by rotating forward and backward.
Inside the water tank, external jet headers 13 open along the travel path of the rotating roller 9 and on both sides thereof. The external injection header 13 injects high-pressure water onto the external surface of the steel pipe underwater, thereby uniformly cooling the external surface of the pipe and stirring the water. FIG. 2 is a schematic perspective view of a rotating roller drive device applied to the steel pipe immersion hardening apparatus described above. 3 is a top view of the rotary roller drive device, and FIG. 4 is a front view of the rotary roller drive device as seen from the direction of arrow F in FIG. The rotating shaft 6 of the tilting device extends long from above the water tank 11 toward the outside of the water tank 11, and its shaft end is connected to a tilting arm drive mechanism of the tilting device, which will be described later. A transmission gear box 24 is fixed to the rotating shaft 6 at a position outside the water tank 11. As shown in FIGS. 2 and 3, inside the transmission gear box 24, a driving gear 25, two driven gears 27, 29, and intermediate gears 26, 28 between these gears are pivotally supported in mesh with each other. There is. The drive gear 25 is connected to a rotating roller drive motor 31 by a drive shaft 30 and universal joints 32,32. The shaft ends of the roller shafts 9a, 9a that pivotally support the rotating rollers 9, 9 are connected to inclined connecting rods 23,
23 and universal joints 33, 33 to the driven gears 27, 29 of the transmission gear box 24.

In this case, each inclined connecting rod 23, 23 is inclined obliquely upward at a predetermined angle α from the shaft end of the roller shaft 9a, 9a inside the tank toward the driven gears 27, 29 outside the tank. In the perspective view of FIG. 2, the upper tilting arm and the presser roller are not shown for clarity. FIG. 5 is an enlarged sectional view taken along the line 1--2 in FIG. 4, showing the tilting arm drive mechanism.

This tilting arm drive mechanism will be explained with reference to FIGS. 4 and 5. The rotation shaft 6 of the tilting device is mounted on the bearing part on the pedestal 39.
The shaft end 6a (Fig. 2) of is pivotally supported. A swinging rod 38 protruding laterally from the rotating shaft 6 is fixed to this bearing portion. The tip of the swinging rod 38 is linked to one end of the connecting rod 34. A tilting arm drive motor 35 is installed further outside the pedestal 39, and an output shaft 36 of the arm drive motor 35 is connected to a crankshaft 41 that is supported by another pedestal 40 lower than the pedestal 39. The crankshaft 41 is linked to the other end of the connecting rod 34. Swinging rod 3
8. The mutual relationship between the connecting rod 34 and the crankshaft 41 is as follows:
When the crankshaft 41 rotates in one direction, the swinging rod 38 is set in such a relationship that it swings back and forth about the rotating shaft 6 at a predetermined angle θ via the connecting rod 34. That is, due to the unidirectional rotational drive of the tilting arm drive motor 35, one end of the connecting rod 34 makes a circular motion with a radius R centering on the motor shaft, and the tip of the connecting rod 34 makes a reciprocating motion with a radius r and an angle θ centering on the rotating shaft 6. dynamic movement, which causes the rotation axis 6 of the tilting device to
rotates back and forth within an angle of 0. As is clear from the above configuration, the rotating rollers 9, 9 are rotated by the rotating roller drive motor 31, and the drive shaft 30, the gear transmission mechanism in the transmission gear box 24, the inclined connecting rods 23, 23, and the rollers are rotated. The gear rotates around its axis via the shafts 9a, 9a, and also rotates through the connecting rod 3 rocking rod 38, the rotating shaft 6, and the tilting arm 7a by the drive of the tilting arm drive motor 35. Together with the box 24 and the inclined connecting rods 23, 23, a reciprocating rotational movement is performed around the rotating shaft 6 at an angle θ.

This allows the steel pipe 1 on the rollers 9, 9 to be immersed in the water tank while being rotated from the air. in this case,
Since the inclined connecting rods 23, 23 face obliquely upward from the roller shafts 9a, 9a, the connecting rods do not hit the upper edge of the water tank 11. A pair of rotating rollers 9, 9 are rotated together in the same direction by a gear train in a gear box 24. As described above, in the present invention, the drive motor and transmission device provided outside the water tank can rotate the rotary roller while rotating it around the axis of the other shaft. The reciprocating turning motion can be efficiently performed by the swinging crank mechanism.
Note that when the steel pipe is quenched by being immersed in water, the pressing force of the presser roller 8 in the water is stronger than that in the air, and is usually about 500k9. When the rotating roller 9 comes close to the receiving arm 14, the presser roller 8 rises to release the pressing force, and the jump arm 10 provided on the lower arm 7a operates to push the steel pipe 1 on the rotating roller 9 from below. Kick it out and transfer it to the recessed part of the receiving arm 14. After passing the steel pipe 1 to the receiving arm 14, the rotating shaft 6 rotates in the opposite direction, and the upper and lower tilting arms 7b, 7a return to their original steel pipe receiving positions. Thereafter, the receiving arm 14 rotates to the position indicated by the dashed line in the figure, whereby the steel pipe falls onto the underwater skid 21 under its own weight, rolls thereon, and is received by the receiving hook 19 of the conveyor device 15. The receiving arm 14 returns to the upper limit position, and the hardened steel pipe held by the conveyor device 15 is conveyed from the upper end of the device 15 to the outside of the tank. Note that the operation timing of each member of the device is automatically determined by timer settings or the like.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view of a steel pipe immersion hardening apparatus to which the present invention is applied, FIG. 2 is a perspective view schematically and partially showing a rotating roller drive device, and FIG. 3 is a schematic perspective view of a rotating roller drive device. A top view, FIG. 4 is a side view of the tilting arm drive mechanism, FIG. 5 is an enlarged sectional view taken along the line V-V in FIG. 4, and FIG. 6 is a tilting operation of the tilting arm and rotating roller. FIG. 1... Steel pipe, 6... Rotating shaft, 8...
...Press roller, 9...Rotating roller, 9a...
... Rotating roller shaft, 11 ... Water tank, 23 ...
... Inclined connecting rod, 24 ... Transmission gear box, 2
5... Drive gear, 27, 29... Driven gear, 31, 35... Drive motor, 34...
・・Connecting rod, 38・・Swinging rod, 41・・・・
・Crankshaft.

Claims (1)

[Claims] 1. A steel pipe holding device consisting of a rotating roller and a presser roller, and a tilting device that pivotally supports the rotating roller and the presser roller and performs a reciprocating rotation operation from the air into the water tank, and the heated steel pipe is A steel pipe immersion quenching apparatus in which the steel pipe is lowered while being rotated in the air while being pressed and held from above and below by both rollers and immersed in water, includes a transmission gear box fixed to the rotating shaft of the tilting device, and the rotating roller. an inclined connecting rod that slopes obliquely upward from the shaft end toward the driven gear in the transmission gear box and connects the shaft end and the driven gear via a universal joint; and a driving gear in the transmission gear box. A rotary roller drive device for a steel pipe immersion hardening apparatus, comprising: a drive motor that transmits power through a universal joint; and a reciprocating rotation drive device that reciprocates a rotating shaft of the tilting device.