CN218361313U - Double-step mandrel retaining device - Google Patents

Abstract

The utility model belongs to the technical field of steel pipe rolling, and relates to a double-step mandrel retaining device, wherein two step shafts, namely a first step shaft and a second step shaft, are arranged at the tail part of a mandrel; the rod penetrating device comprises a rod penetrating device body and a rod penetrating push head, one end of the rod penetrating device body, which is close to the core rod, is in abutting connection with the tail end of the core rod, and the rod penetrating push head is hinged to the rod penetrating device body, is in a horizontal state under the condition of no external force and is clamped on the first stepped shaft to realize detachable connection of the rod penetrating device and the core rod; the retained clamping device comprises a retained clamping head and a retained driving device used for driving the retained clamping head, the front end of the mandrel penetrates through the retained clamping head, the retained clamping head clamps and fixes a second stepped shaft located at the tail of the mandrel, and the retained clamping head is in abutting connection with steps on two sides of the second stepped shaft to achieve retained rolling of the mandrel. The utility model discloses a two segmentation are worn the rolling longer problem of rolling cycle of stick to have solved steel pipe among the prior art on line, have improved production efficiency.

Description

Double-step mandrel retaining device

Technical Field

The utility model belongs to the technical field of the steel pipe is rolled, a two ladder plug stop devices is related to.

Background

The seamless steel tube retained rolling is characterized in that the operation of a core rod is controlled in the whole rolling process, so that the core rod runs at a set speed, and an online rod penetrating mode and an offline pre-penetrating mode are adopted during production.

When off-line pre-threading is carried out, the core rod sprayed with graphite is penetrated into the capillary tube stopped on the pre-threading wire by the pre-threading device, the capillary tube after rod penetration is transversely moved to the main rolling line by the transfer device for limited rolling, but the temperature drop of the capillary tube is larger. The method is characterized in that a blank tube is directly transversely moved to a main rolling line by a transfer device during on-line rod penetration, a lubricated mandrel is sent to the rolling line by the transfer device, the tail part of the mandrel just falls into a mandrel clamping mechanism at the front end of a limiting device (limiting rack), the mandrel is driven by a gear to drive a limiting rack to drive the mandrel to advance to penetrate and roll after the mandrel is in place, the limiting rack is returned to a waiting position after the rolling is finished, the used mandrel is unloaded, and then the next limiting rolling cycle is carried out, so that the auxiliary working time of the penetrating and limiting clamping of the mandrel in the existing on-line rod penetration is longer, the rolling period of the steel tube is longer, and the production efficiency is lower.

Therefore, a new mandrel retaining device is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a two-step plug stopper adopts the rolling longer problem of rolling cycle of two segmentation online stick wearing in order to solve the steel pipe among the prior art, improves production efficiency.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a double-step mandrel restraint device comprises a rolling conveying roller way arranged on a rolling central line, one end of the rolling conveying roller way is butted with a rolling mill, the other end of the rolling conveying roller way is provided with a mandrel penetrating device, a restraint clamping device is arranged between the mandrel penetrating device and the rolling mill, a fixed mandrel is clamped through the restraint clamping device for restraint rolling, and the tail part of the mandrel is provided with two sections of step shafts which are a first step shaft and a second step shaft respectively;

the rod penetrating device comprises a rod penetrating device body and a rod penetrating pushing head, one end, close to the core rod, of the rod penetrating device body is connected with the tail end of the core rod in an abutting mode, the rod penetrating pushing head is hinged to the rod penetrating device body, is in a horizontal state under the effect of no external force and is clamped on the first stepped shaft to achieve detachable connection of the rod penetrating device and the core rod;

the retained clamping device comprises a retained clamping head and a retained driving device used for driving the retained clamping head, the front end of the mandrel penetrates through the retained clamping head, the retained clamping head clamps and fixes a second stepped shaft located at the tail of the mandrel, and the retained clamping head is abutted against steps on two sides of the second stepped shaft to be connected so as to achieve retained rolling of the mandrel.

Further, the outer diameters of the core rods are consistent, and the outer diameters of the two sections of stepped shafts at the tail of the core rods are smaller than the outer diameter of the core rods, so that the core rods can pass through the rolling roller conveyor.

Further, the rod penetrating pushing head is rotatably connected to the rod penetrating device body through a hinge shaft.

Furthermore, the two ends of the hinge shaft are provided with first driving devices for driving the hinge shaft to rotate so as to realize the rotation of the rod penetrating pushing head, so that the detachable connection of the rod penetrating pushing head and the core rod is realized.

Further, the rod penetrating device body comprises a first driving rack and a first gear set used for driving the first driving rack, and the rod penetrating pushing head is hinged to the first driving rack.

Furthermore, a guide inclined plane is arranged between the tail end of the core rod and the first stepped shaft so as to facilitate the clamping connection of the rod penetrating pushing head and the first stepped shaft.

Furthermore, the retained clamping head comprises a clamping head body and a fixed retaining frame for installing the clamping head body, the clamping head body is opened or closed under the action of a second driving device so as to clamp or discharge the core rod, and the fixed retaining frame is connected to the retained driving device so as to retain and roll the core rod.

Furthermore, the motion-limiting driving device comprises a second driving rack and a second gear set used for driving the second driving rack, and the motion-limiting clamping head is fixedly connected to the second driving rack.

Furthermore, the limiting driving device also comprises a fixed frame used for installing a second rack, a roller group installed on the second driving rack and a guide wheel connected to the roller group, wherein the roller group is positioned on the second driving rack and adjacent to two sides of one side meshed with the second gear group and is connected with the fixed frame in a sliding manner.

Furthermore, a running bed which is connected with the roller group and the guide wheel in a sliding mode is arranged on the fixed frame, so that the second driving rack is connected with the fixed frame in a sliding mode.

The beneficial effects of the utility model reside in that:

the utility model discloses a to wear excellent device and limit clamping device and carry out the distributing type and arrange, wear the one end that the rolling mill was kept away from at rolling rollgang to the excellent device setting of limit, thereby limit clamping device sets up between wearing excellent device and rolling mill to thereby be equipped with two sections step shafts at the afterbody of plug and form two step mandrels, so that wear excellent device and limit clamping device and be connected with dismantling of plug. In the rolling process, firstly, a mandrel penetrates into a hollow billet at a set speed through a mandrel penetrating device and moves to the position of a retained clamping device, the retained clamping device is connected and matched with the mandrel penetrating device, after the front ends of the mandrel and the hollow billet penetrate through the retained clamping head, the retained clamping head clamps and fixes the mandrel through a second stepped shaft, a mandrel penetrating pushing head rotates and leaves a first stepped shaft of the mandrel, the mandrel penetrating device is separated from the mandrel, and the mandrel is retained and rolled under the action of the retained clamping device, so that two-section online mandrel penetrating rolling is realized, the mandrel penetrating device can return to a waiting position in the retained rolling process, the rolling cycle time is not occupied, after rolling is finished, the retained clamping device clamps the mandrel to retract at a high speed, after the mandrel exits from a rolling mill, the retained clamping head is opened, the mandrel can move out of a rolling central line through a transferring device and enter the next retained rolling cycle, the rolling cycle is shortened, and the production efficiency is improved.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and/or combinations particularly pointed out in the appended claims.

Drawings

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings, wherein:

FIG. 1 is a schematic diagram of a dual-step mandrel retaining apparatus according to one embodiment;

FIG. 2 is a schematic cross-sectional view of a motion-limiting clamp assembly according to one embodiment;

FIG. 3 is a drawing showing the working state of the rod-threading of the double-step mandrel retaining device in one embodiment

Fig. 4 is a working state diagram of the rod penetrating device and the limiting clamping device in one embodiment.

Reference numerals are as follows: the mandrel clamping device comprises a mandrel 1, a mandrel penetrating device 2, a motion-limiting clamping device 3, a capillary 4, a first stepped shaft 101, a second stepped shaft 102, a guide inclined plane 103, a mandrel penetrating device body 201, a mandrel penetrating pushing head 202, a mandrel penetrating pushing head gravity center 2021, a hinge shaft 203, a clamping head body 301, a fixed motion-limiting frame 302, a second driving rack 303, a roller group 304, a side guide wheel 305, a running bed 306, a fixed frame 307 and a second gear group 308.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can be implemented or applied by other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples can be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in any way limiting the scope of the invention; for a better explanation of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc., indicating directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and those skilled in the art can understand the specific meanings of the terms according to specific situations.

In this embodiment, the tail end and the front end are referred to by a distance from the rolling mill, one end close to the rolling mill is the front end, and one end far away from the rolling mill is the tail end.

Referring to fig. 1 to 3, a double-step mandrel retaining device includes a rolling roller conveyor arranged on a rolling center line, one end of the rolling roller conveyor is butted with a rolling mill, the other end of the rolling roller conveyor is provided with a rod penetrating device 2, a retaining and clamping device 3 is arranged between the rod penetrating device 2 and the rolling mill, a mandrel 1 is clamped and fixed by the retaining and clamping device 3 for retaining and rolling, and the tail of the mandrel 1 is provided with two sections of step shafts, namely a first step shaft 101 and a second step shaft 102; the rod penetrating device 2 comprises a rod penetrating device body 201 and a rod penetrating push head 202, one end, close to the core rod 1, of the rod penetrating device body 201 is in abutting connection with the tail end of the core rod 1, the rod penetrating push head 202 is hinged to the rod penetrating device body 201, the gravity center 2021 of the rod penetrating push head is located at one end, close to the core rod 1, of the rod penetrating push head 202, is in a horizontal state under the condition that no external force is applied, and is clamped on the first stepped shaft 101 to achieve detachable connection of the rod penetrating device 2 and the core rod 1, and a guide inclined plane 103 is arranged between the tail end of the core rod 1 and the first stepped shaft 101 to facilitate clamping connection of the rod penetrating push head 202 and the first stepped shaft 101; the retained clamping device 3 comprises a retained clamping head and a retained driving device for driving the retained clamping head, the front end of the mandrel 1 penetrates through the retained clamping head, the retained clamping head clamps and fixes the second stepped shaft 102 positioned at the tail part of the mandrel 1, and the retained clamping head is abutted against the steps at two sides of the second stepped shaft 102 to be connected so as to realize retained rolling of the mandrel 1.

In this embodiment, the outer diameters of the mandrel 1 are the same, and the outer diameters of two stepped shafts at the tail of the mandrel 1 are smaller than the outer diameter of the mandrel 1, so that the mandrel 1 passes through a rolling roller conveyor, the mandrel penetrating pushing head 202 is rotatably connected to the mandrel penetrating device body 201 through the hinge shaft 203, and first driving devices for driving the hinge shaft 203 to rotate are arranged at two ends of the hinge shaft 203 to rotate the mandrel penetrating pushing head 202, so that the mandrel penetrating pushing head 202 and the mandrel 1 can be detachably connected, and the first driving devices can be specifically hydraulic motors.

In another embodiment, the rod penetrating head 202 is rotated by an external opening device, so that the rod penetrating head 202 is detachably connected to the mandrel 1.

Specifically, the rod penetrating device body 201 comprises a first driving rack and a first gear set for driving the first driving rack, and the rod penetrating pushing head 202 is hinged to the first driving rack; the movement limiting driving device comprises a second driving rack 303 and a second gear set 308 for driving the second driving rack 303, the movement limiting clamping head is fixedly connected to the second driving rack 303, the movement limiting driving device further comprises a fixed frame 307 for mounting the second rack, a roller set 304 mounted on the second driving rack 303 and a guide wheel connected to the roller set 304, the roller set 304 is positioned on two adjacent sides of one side of the second driving rack 303 meshed with the second gear set 308 and is in sliding connection with the fixed frame 307, and a runner 306 in sliding connection with the roller set 304 and the guide wheel is arranged on the fixed frame 307 so as to realize the sliding connection between the second driving rack 303 and the fixed frame 307; the lower part of the second driving rack 303 is processed with teeth, the side surface is provided with a roller group 304 and a side guide wheel 305, the stopper clamping head is fixedly connected to the top of the second driving rack 303 and moves on the running bed 306 under the driving of a second gear group 308, and the first gear group and the second gear group 308 are driven by an external driving motor.

Further, the retained clamp head includes clamp head body 301 and the fixed retained frame 302 that is used for installing clamp head body 301, clamp head body 301 opens or closes in order to realize centre gripping or unloading to plug 1 under second drive arrangement's effect, fixed retained frame 302 is connected on the retained drive arrangement in order to realize the retained rolling of plug 1, second drive arrangement specifically can be hydraulic drive arrangement, with clamp head body 301 cooperatees and forms hydraulic clamp holder.

In the rolling process, the double-step mandrel retaining device provided by the embodiment comprises the following specific steps:

moving the mandrel 1 and the hollow billet 4 into a rolling line; the rod penetrating device 2 is connected with the core rod 1 through the rod penetrating pushing head 202, pushes the core rod 1 to penetrate into the capillary 4 at a high speed, and then operates to a preset position in a decelerating mode; starting the retained clamping device 3, in the process of decelerating the rod penetrating device 2, when the rod penetrating device runs to a speed matched with the speed of the retained clamping device 3, lifting the rod penetrating push head 202, separating the rod penetrating device 2 from the core rod 1, retreating to a rod penetrating position to wait for the next rolling cycle, and simultaneously, starting running by clamping the second stepped shaft 102 of the core rod 1 by the retained clamping device 3 to perform retained rolling; after rolling is finished, the retained clamping device 3 clamps the core rod 1 to retract to a blanking position at a high speed (the distance of retracting 1 core rod length), and when the external core rod blanking device clamps the core rod 1 to discharge, the subsequent capillary 4 and the core rod 1 move in simultaneously to finish a rolling cycle. It should be noted that the rolling roller conveyor is a lifting roller conveyor, and is matched with the motion-limiting clamping device 3 in the motion-limiting rolling process to avoid motion interference.

In the embodiment, the double-step mandrel retaining device adopts two-section online bar penetrating rolling, the bar penetrating device 2 can return to a waiting position in the retaining rolling process, and the rolling cycle time is not occupied; after the rolling is finished, the retained clamping device 3 clamps the core rod 1 to retract at a high speed, and after the core rod 1 exits from the rolling mill, the core rod blanking device can move the core rod 1 out of the rolling central line to enter the next cycle, so that the rolling period is shortened, and the production efficiency of the seamless steel tube rolling is improved.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or substituted by equivalents without departing from the spirit and scope of the technical solutions, which should be covered by the scope of the claims of the present invention.

Claims (10)

1. The utility model provides a two ladder plug restraint devices, is including locating the rolling rollgang on the rolling central line, rolling rollgang one end docks with the rolling mill, and the other end is equipped with wears excellent device (2), wear restraint clamping device (3) that are equipped with between excellent device (2) and the rolling mill, through restraint clamping device (3) centre gripping fixed core (1), carry out restraint rolling, its characterized in that: the tail of the core rod (1) is provided with two sections of stepped shafts, namely a first stepped shaft (101) and a second stepped shaft (102);

the rod penetrating device (2) comprises a rod penetrating device body (201) and a rod penetrating push head (202), one end, close to the core rod (1), of the rod penetrating device body (201) is connected with the tail end of the core rod (1) in an abutting mode, the rod penetrating push head (202) is hinged to the rod penetrating device body (201), is in a horizontal state under the condition that no external force is applied, and is clamped on the first step shaft (101) to achieve detachable connection of the rod penetrating device (2) and the core rod (1);

the limiting and clamping device (3) comprises a limiting and clamping head and a limiting and driving device for driving the limiting and clamping head, the front end of the mandrel (1) penetrates through the limiting and clamping head, the limiting and clamping head clamps and fixes the second stepped shaft (102) at the tail part of the mandrel (1), and the limiting and clamping device is abutted against the steps on the two sides of the second stepped shaft (102) to be connected with the limiting and rolling of the mandrel (1).

2. The dual-step mandrel retaining apparatus of claim 1, wherein: the outer diameters of the core rods (1) are consistent, and the outer diameters of the two sections of stepped shafts at the tail parts of the core rods (1) are smaller than the outer diameter of the core rods (1), so that the core rods (1) can pass through a rolling roller conveyor.

3. The dual-step mandrel retaining apparatus of claim 1, wherein: the rod penetrating pushing head (202) is rotatably connected to the rod penetrating device body (201) through a hinge shaft (203).

4. The dual-step mandrel retaining apparatus of claim 3, wherein: and first driving devices for driving the hinge shaft (203) to rotate are arranged at two ends of the hinge shaft (203) so as to realize the rotation of the rod penetrating push head (202), so that the rod penetrating push head (202) is detachably connected with the core rod (1).

5. The dual-step mandrel retaining apparatus of claim 1, wherein: the rod penetrating device body (201) comprises a first driving rack and a first gear set used for driving the first driving rack, and the rod penetrating pushing head (202) is hinged to the first driving rack.

6. The dual-step mandrel retaining apparatus of claim 1, wherein: a guide inclined plane (103) is arranged between the tail end of the core rod (1) and the first stepped shaft (101) so as to facilitate clamping of the rod penetrating pushing head (202) and the first stepped shaft (101).

7. The dual-step mandrel retaining apparatus of claim 1, wherein: the retained clamping head comprises a clamping head body (301) and a fixed retained frame (302) used for installing the clamping head body (301), the clamping head body (301) is opened or closed under the action of a second driving device to clamp or discharge a mandrel (1), and the fixed retained frame (302) is connected to the retained driving device to achieve retained rolling of the mandrel (1).

8. The dual-step mandrel retaining apparatus of claim 1, wherein: the motion limiting driving device comprises a second driving rack (303) and a second gear set (308) used for driving the second driving rack (303), and the motion limiting clamping head is fixedly connected to the second driving rack (303).

9. The dual-step mandrel retaining apparatus of claim 8, wherein: the limiting driving device further comprises a fixed frame (307) used for installing a second rack, roller groups (304) installed on the second driving rack (303) and guide wheels connected to the roller groups (304), wherein the roller groups (304) are located on two adjacent sides of one side, meshed with the second gear group (308), of the second driving rack (303) and are connected with the fixed frame (307) in a sliding mode.

10. The dual-step mandrel retaining apparatus of claim 9, wherein: the fixed frame (307) is provided with a running bed (306) which is connected with the roller group (304) and the guide wheel in a sliding way, so that the sliding connection of the second driving rack (303) and the fixed frame (307) is realized.

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