Spline groove type copper bush of double-arm mandrel

Abstract

The utility model discloses a spline groove type copper sleeve of a double-arm mandrel, belongs to the technical field of double-arm mandrels, and solves the problem that a copper sleeve of an existing double-arm mandrel is prone to motion clamping stagnation due to the fact that oxide scales fall off. The copper bush comprises a copper bush body, a plurality of grooves are formed in the copper bush body, the grooves are evenly formed in the inner wall of the copper bush body, each groove extends in the axial direction of the copper bush body and penetrates through the two ends of the copper bush body, and the width and the depth of each groove are the same. A chute is formed in the inner wall of the copper bush body of every two adjacent grooves, the two ends of each chute are communicated with the grooves in the two sides, the widths and the depths of the chutes are the same, and every two adjacent chutes are arranged in an up-down staggered mode. According to the spline groove type copper sleeve, the problem of movement clamping stagnation caused by the fact that oxide scales fall between the copper sleeve and the inner core rod can be avoided, and the service life of the spline groove type copper sleeve is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of double-arm mandrels, and more specifically to a spline groove type copper sleeve of a double-arm mandrel. Background Art

[0002] The double-arm mandrel is an important equipment in the coil collection area of ​​the steel rolling line, used for alternately collecting and transferring coils. Figure 1 As shown, the double-arm mandrel generally consists of an inner core rod 1 and an outer core rod 2. Two copper sleeves 3 are installed on the top of the outer core rod 2. The gap between the copper sleeves 3 and the inner core rod 1 is about 0.2 mm, so that the inner core rod 1 can slide up and down in the copper sleeves 3. Figure 2 As shown, the inner hole wall surface of the existing copper sleeve 3 is a cylindrical surface. In actual use, when the inner core rod 11 rises to receive the wire rod, the iron oxide scale that falls off the wire rod will float into the gap between the inner core rod 1 and the copper sleeve 3, which will reduce the gap between the copper sleeve and the inner core rod over time, thereby causing the inner core rod 1 to get stuck when moving up and down, and cannot be used normally.

[0003] Therefore, it is urgent to design a spline groove type copper sleeve of a double-arm mandrel to solve the above-mentioned technical problems. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a spline groove copper sleeve of a double-arm core shaft in view of the above-mentioned deficiencies in the prior art, which can prevent the problem of movement jamming caused by iron oxide falling between the copper sleeve and the inner core rod, and effectively prolong its service life.

[0005] The technical solution of the utility model is as follows: a spline groove copper sleeve of a double-arm core shaft comprises a copper sleeve body, wherein a plurality of grooves are arranged in the copper sleeve body, and the plurality of grooves are evenly arranged on the inner wall of the copper sleeve body, each of the grooves extends along the axial direction of the copper sleeve body and penetrates to the two ends of the copper sleeve body, and the width and depth of each of the grooves are the same; an inclined groove is arranged on the inner wall of the copper sleeve body of two adjacent grooves, and the two ends of each inclined groove are connected with the grooves on both sides, and the width and depth of each inclined groove are the same, and the two adjacent inclined grooves are arranged in an upper and lower staggered manner.

[0006] As a further improvement, the groove has a depth of 5 mm and a width of 10 mm.

[0007] Furthermore, the depth of the inclined groove is 5 mm and the width is 8 mm.

[0008] Furthermore, the lowest ends of two adjacent inclined grooves face opposite directions.

[0009] Furthermore, both inner and outer walls of the copper sleeve body are chamfered.

[0010] Furthermore, at least two threaded holes are formed on the top surface of the copper sleeve body.

[0011] Furthermore, a plug is slidably inserted into the threaded hole, and the top surface of the plug is flush with the top surface of the copper sleeve body.

[0012] Beneficial Effects

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1. The spline groove copper sleeve of the utility model has an inner hole changed from the original cylindrical surface to a spline groove type. After the oxidized iron sheet falls between the copper sleeve and the inner core rod, it will fall along the groove to the bottom base of the outer core rod, which can avoid the problem of movement jamming caused by the oxidized iron sheet falling between the copper sleeve and the inner core rod, and effectively extend its service life.

[0015] 2. The spline groove copper sleeve of the utility model has an inclined groove between two adjacent grooves. When the inner core rod slides up and down, the oxidized iron sheet remaining on the inner wall of the copper sleeve between the two adjacent grooves can be pushed into the inclined groove, further avoiding the problem of movement jamming. At the same time, the inclined groove can use the gravity of the oxidized iron sheet to guide it into the groove for discharge. The structure is more ingenious, further reducing the risk of movement jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a double-arm mandrel in the prior art;

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of a copper sleeve in the prior art;

[0018] Figure 3 It is a schematic diagram of the top view structure of the utility model;

[0019] Figure 4 It is a schematic diagram of the cross-sectional structure of the utility model.

[0020] Among them: 1-inner core rod, 2-outer core rod, 3-copper sleeve, 4-copper sleeve body, 5-groove, 6-bevel groove, 7-chamfer, 8-threaded hole. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0022] See also Figure 3-4The utility model discloses a spline groove copper sleeve of a double-arm core shaft, comprising a copper sleeve body 4, in which a plurality of grooves 5 are arranged, and the plurality of grooves 5 are evenly arranged on the inner wall of the copper sleeve body 4 to form a spline groove copper sleeve, each groove 5 extends along the axial direction of the copper sleeve body 4 and penetrates to both ends of the copper sleeve body 4, ensuring that the groove 5 can drain the oxidized iron sheet to the bottom base of the outer core rod 2, and the width and depth of each groove 5 are the same, which is convenient for processing.

[0023] The spline groove copper sleeve of the utility model has an inner hole changed from the original cylindrical surface to the spline groove type. After the oxidized iron sheet falls between the copper sleeve 3 and the inner core rod 1, it will fall along the groove 5 to the bottom base of the outer core rod 2, which can avoid the problem of movement jamming caused by the oxidized iron sheet falling between the copper sleeve 3 and the inner core rod 1, and effectively extend its service life.

[0024] Preferably, an inclined groove 6 is provided on the inner wall of the copper sleeve body 4 of two adjacent grooves 5, and both ends of each inclined groove 6 are connected to the grooves 5 on both sides to ensure that the iron oxide scale dropped into the inclined groove 6 can be drained into the groove 5, and the width and depth of each inclined groove 6 are the same, which is convenient for processing, and the two adjacent inclined grooves 6 are arranged in an upper and lower staggered manner to ensure the structural strength of the copper sleeve. Furthermore, chamfers are provided on both sides of the top of the inclined groove 6 to avoid the problem of the top opening of the inclined groove 6 and the inner core rod 1 being stuck, so as to ensure that the inner core rod 1 slides smoothly.

[0025] The spline groove type copper sleeve of this embodiment has an inclined groove 6 between two adjacent grooves 5. When the inner core rod 1 slides up and down, the iron oxide scale remaining on the inner wall of the copper sleeve between the two adjacent grooves 5 can be pushed into the inclined groove 6, further avoiding the problem of movement jamming. At the same time, the inclined groove 6 can use the iron oxide scale's own gravity to guide it into the groove 5 for discharge. The structure is more ingenious, further reducing the risk of movement jamming.

[0026] Preferably, the depth of the groove 5 is 5 mm and the width is 10 mm, and the size of the groove 5 is reasonably optimized to ensure the structural strength of the copper sleeve. The depth of the chute 6 is 5 mm and the width is 8 mm, and the size of the chute 6 is reasonably optimized to ensure the structural strength of the sleeve. At the same time, the depth of the groove 5 is the same as that of the chute 6, so that the iron oxide in the chute 6 can fall into the groove 5.

[0027] Preferably, the lowest ends of two adjacent inclined grooves 6 face opposite directions, and the inclined grooves 6 arranged in different directions can further ensure the structural strength of the copper sleeve.

[0028] Preferably, chamfers 7 are provided on the inner wall and the outer wall at both ends of the copper sleeve body 4, so as to facilitate the installation of the copper sleeve in the outer core rod 2 and also facilitate the sliding of the inner core rod 1 in the copper sleeve.

[0029] Preferably, at least two threaded holes 8 are formed on the top surface of the copper sleeve body 4, and the threaded holes 8 are evenly distributed. When removing the copper sleeve, bolts can be screwed into the threaded holes to facilitate applying force to the copper sleeve to pull it out. For example, a lifting rope can be tied to the bolt position, and then the lifting rope can be lifted by a crane to pull out the copper sleeve, which is very convenient for removal.

[0030] Preferably, a plug is slidably inserted in the threaded hole 8 to prevent iron oxide from entering the threaded hole, and the top surface of the plug is flush with the top surface of the copper sleeve body 4, so as not to affect the installation of the copper sleeve.

[0031] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A spline groove copper sleeve for a double-arm mandrel, comprising a copper sleeve body (4), characterized in that: The copper sleeve body (4) is provided with a plurality of grooves (5), and the plurality of grooves (5) are evenly arranged on the inner wall of the copper sleeve body (4), and each of the grooves (5) extends along the axial direction of the copper sleeve body (4) and penetrates to both ends of the copper sleeve body (4), and the width and depth of each of the grooves (5) are the same; the inner wall of the copper sleeve body (4) of two adjacent grooves (5) is provided with an inclined groove (6), and both ends of each inclined groove (6) are connected to the grooves (5) on both sides, and the width and depth of each inclined groove (6) are the same, and the two adjacent inclined grooves (6) are arranged in an up-and-down staggered manner.

2. A spline groove copper sleeve for a double-arm mandrel according to claim 1, characterized in that: The groove (5) has a depth of 5 mm and a width of 10 mm.

3. The spline groove copper sleeve of the double-arm mandrel according to claim 1, characterized in that: The inclined groove (6) has a depth of 5 mm and a width of 8 mm.

4. The spline groove copper sleeve of the double-arm mandrel according to claim 1, characterized in that: The lowest ends of two adjacent inclined grooves (6) face opposite directions.

5. A spline groove copper sleeve for a double-arm mandrel according to any one of claims 1 to 4, characterized in that: The inner wall and the outer wall at both ends of the copper sleeve body (4) are provided with chamfers (7).

6. A spline groove copper sleeve for a double-arm mandrel according to claim 5, characterized in that: The top surface of the copper sleeve body (4) is provided with at least two threaded holes (8).

7. A spline groove copper sleeve for a double-arm mandrel according to claim 6, characterized in that: A plug is slidably inserted into the threaded hole (8), and the top surface of the plug is flush with the top surface of the copper sleeve body (4).

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