CN219073942U

CN219073942U - Rolling length control device of rolling mill

Info

Publication number: CN219073942U
Application number: CN202223501622.1U
Authority: CN
Inventors: 叶青; 吕菊明; 徐新红; 吴益; 周云峰; 陈文元; 钱振方
Original assignee: Changshu Seamless Steel Tube Co ltd
Current assignee: Changshu Seamless Steel Tube Co ltd
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-05-26
Anticipated expiration: 2032-12-27

Abstract

The utility model provides a point length controlling means is rolled to point machine, includes base, point mechanism and point actuating mechanism, and point mechanism includes a pair of wallboard, establishes the power shaft between two wallboards, establishes down the roll of rolling between two wallboards, goes up the roll of rolling, and the one end of power shaft is connected with the one end of lower roll of rolling, and the other end is connected with the one end of last roll of rolling, and the other end of power shaft is connected with point actuating mechanism, and characteristics are: there is steel pipe stop gear in the position department that corresponds upper and lower roll point roller between two wallboards, steel pipe stop gear includes the support, fixes the electricity that is pushed on the support and pushes away the jar, the electricity that is connected with the electricity and push away the jar pushes away jar motor, the electricity is pushed away one side of jar and is constituteed and push away the jar push rod, the electricity is pushed away the tip of jar push rod and is had the limiting plate, one side of limiting plate has the insulation board, one side of insulation board has the current-conducting plate, establish inductive switch on the support, inductive switch and current-conducting connection of current-conducting plate and wallboard. The length of the rolled tip can be unified, the cold drawing process requirement is met, and the condition of pipe clamping caused by overlong length of the rolled tip is avoided.

Description

Rolling length control device of rolling mill

Technical Field

The utility model belongs to the technical field of seamless steel tube processing equipment, and particularly relates to a rolling length control device of a rolling mill.

Background

The seamless steel pipe is a common pipe in daily life, has a very wide application range, has irreplaceable status in terms of manufacturing structural parts and mechanical parts and pipelines or structural parts for conveying fluid, does not need to manually hold the pipe and carry out rotary auxiliary processing procedures in the processing process, for example, before cold drawing the seamless steel pipe, one end of the seamless steel pipe needs to be subjected to tip rolling (i.e. shrinkage) treatment, and can be clamped by a cold drawing trolley after passing through a cold drawing die, and meanwhile, the situation that the end of the seamless steel pipe is deformed and separated from the cold drawing trolley in the cold drawing process is prevented. The existing rolling mill is divided into a manual type rolling mill and an automatic type rolling mill, but the rolling mill with the rolling mill is uncontrollable in rolling mill length, when the rolling mill roll and the steel pipe slide seriously, the rolling mill length is relatively short and cannot meet the cold drawing requirement, and if the rolling mill length is too long, the pipe clamping can be caused. In view of the above problems, in the prior art, if only one baffle is simply provided to control the length of the rolling tip, the steel pipe may be bent at the tip due to impact on the baffle.

In view of the above, it is necessary to design a rolling mill sharpening length control device that is simple in structure and capable of effectively controlling the sharpening distance. To this end, the applicant has made an advantageous design, and the technical solutions described below are produced in this context.

Disclosure of Invention

The utility model aims to provide a sharp rolling length control device of a sharp rolling machine, which is beneficial to improving a limit structure of the sharp rolling of a steel pipe, so that the sharp rolling length can be controlled, the sharp rolling length of a seamless steel pipe can be unified to meet the cold drawing process requirement, and the condition of pipe clamping caused by overlong sharp rolling length is avoided.

The utility model aims at achieving the aim, and the rolling length control device of the rolling tip machine comprises a base, a rolling tip mechanism arranged on the base and a rolling tip driving mechanism in transmission connection with the rolling tip mechanism, wherein the rolling tip mechanism comprises a pair of wallboards, a power shaft rotationally arranged between the two wallboards, a lower rolling tip roller rotationally arranged between the two wallboards and positioned above the power shaft, and an upper rolling tip roller rotationally arranged between the two wallboards and positioned above the lower rolling tip roller, one end of the power shaft is in transmission connection with one end of the lower rolling tip roller, the other end of the lower rolling tip roller is in transmission connection with one end of the upper rolling tip roller, and the other end of the power shaft is in transmission connection with the rolling tip driving mechanism, and the rolling tip length control device is characterized in that: the steel pipe limiting mechanism is fixed between the two wallboards at the positions corresponding to the lower sharpening roller and the upper sharpening roller and comprises a bracket, an electric push cylinder and an electric push cylinder motor, wherein two sides of the bracket are fixed with the wallboards, the electric push cylinder is fixed on the bracket, the electric push cylinder motor is in transmission connection with the electric push cylinder, an electric push cylinder push rod is formed on one side facing the lower sharpening roller and the upper sharpening roller, a limiting plate is fixed at the end part of the electric push cylinder push rod, an insulating plate is fixed on one side facing the lower sharpening roller and the upper sharpening roller, a conducting plate is fixed on one side facing the lower sharpening roller and the upper sharpening roller, and an inductive switch is arranged on the bracket and is respectively in conductive connection with the conducting plate and the wallboards.

In a specific embodiment of the present utility model, a pair of limiting plate guide rods are disposed on the limiting plate, one end of each limiting plate guide rod penetrates through the bracket, and a pair of guide sleeves for sliding of the limiting plate guide rods are mounted on the bracket.

In another specific embodiment of the utility model, a circle of electric pushing cylinder flange is formed on the electric pushing cylinder, and the electric pushing cylinder flange is fixedly connected with the bracket through a group of electric pushing cylinder flange screws.

In another specific embodiment of the present utility model, two sides of the bracket are respectively provided with a bracket fixing plate, the bracket fixing plate is provided with a pair of bracket fixing plate screw holes, the bracket is respectively fixed with the corresponding wallboard screw through the bracket fixing plate screw holes, the bracket is provided with an electric push cylinder push rod abdicating hole and a pair of guide sleeve limiting holes, and the bracket around the electric push cylinder push rod abdicating hole is also provided with a circle of electric push cylinder fixing screw holes.

In still another specific embodiment of the present utility model, a roller seat cavity with an upward opening is formed in the middle of the upper end of the wall plate, two ends of the lower roller and the upper roller are respectively rotatably disposed in a lower roller seat and an upper roller seat, the lower roller seat is abutted against the lower side of the corresponding upper roller seat, the lower roller seat and the upper roller seat are both disposed in the roller seat cavity on one side, a fixing block is respectively fixed at the opening of the upper end of the roller seat cavity, an expansion block is slidably disposed in front of and behind the lower end of the fixing block, an expansion block inclined surface is formed on the lower side surface of the expansion block, an expansion face matched with the expansion block inclined surface is formed on the upper end surface of the upper roller seat, the wall plates are respectively disposed on a roller tip frame in a opposite manner, the roller tip frame is fixed on the base, two end of the shaft extend out of the wall plate and are respectively rotatably supported by a shaft bearing, two ends of the lower roller extend out of the wall plate on two sides respectively, a fixing block is respectively fixed at the upper end of the roller seat, a lower roller is provided with a tip gear engaged with one end of the lower roller, a lower roller is disposed at one end of the roller is engaged with a lower roller, and one end of the roller is disposed at one end of the lower roller.

In still another specific embodiment of the present utility model, the front and rear sides of the fixing block are respectively fixed with the wallboard at the corresponding side through a fixing block screw, a sliding groove is formed at the lower end of the fixing block along the front and rear direction, a sliding block sliding in the sliding groove is formed at the upper end of the tensioning block, an adjusting screw is respectively abutted to the front and rear sides of the tensioning block, and the adjusting screw is respectively connected to the wallboard along the front and rear direction in a threaded manner.

In a further specific embodiment of the present utility model, a lower roller shaft bearing is respectively disposed in the lower roller shaft seat, the lower sharpening roller is rotatably disposed in the lower roller shaft bearing, a lower roller shaft bearing cover plate is respectively disposed on the left and right sides of the lower roller shaft seat, and the lower roller shaft bearing cover plate is fixedly connected with the lower roller shaft seat through a circle of lower roller shaft bearing cover plate screws respectively; an upper roll shaft bearing is arranged in the upper roll shaft seat respectively, the upper sharp roll is rotationally arranged in the upper roll shaft bearing, an upper roll shaft bearing cover plate is respectively arranged on the left side surface and the right side surface of the upper roll shaft seat, and the upper roll shaft bearing cover plate is fixedly connected with the upper roll shaft seat through an upper roll shaft bearing cover plate screw respectively.

In a further specific embodiment of the present utility model, the sharpening driving mechanism includes a motor, a first reduction gearbox and a second reduction gearbox, the motor is fixed on the first reduction gearbox and is in transmission connection with each other, a first reduction gearbox output shaft is formed on the first reduction gearbox, two ends of the second reduction gearbox are respectively formed with a second reduction gearbox input shaft and a second reduction gearbox output shaft, the first reduction gearbox and the second reduction gearbox are respectively fixed on the base, the first reduction gearbox output shaft is in transmission connection with the second reduction gearbox input shaft through a first coupling, and the second reduction gearbox output shaft is in transmission connection with the other end of the power shaft through a second coupling.

In yet another specific embodiment of the present utility model, a lower sharpening roller eccentric and an upper sharpening roller eccentric are formed on the lower sharpening roller and the upper sharpening roller, and a group of lower sharpening roller grooves and a group of upper sharpening roller grooves with different diameters are respectively arranged on the lower sharpening roller eccentric and the upper sharpening roller eccentric at intervals, and the diameters of the opposite lower sharpening roller grooves and the upper sharpening roller grooves are the same and are mutually matched to form sharpening holes.

In yet another embodiment of the present utility model, a top plate is fixed between two of the wall plates, and two sides of the top plate are respectively fixed on top of the wall plate on the corresponding side.

After the structure is adopted, the utility model has the beneficial effects that: because the structure that a loop is formed between the inductive switch and the conductive plate and the wallboard to control the electric push cylinder to move so as to limit the length of the rolled tip is adopted, the length of the rolled tip can be unified, the cold drawing process requirement is met, and the condition of pipe clamping caused by overlong length of the rolled tip is effectively avoided.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.

Fig. 2 is a schematic side view of fig. 1.

Fig. 3 is a schematic structural view of the bracket according to the present utility model.

In the figure: 1. roller cone mechanism, 11, wallboard, 111, roller seat cavity, 112, fixed block, 1121, fixed block screw, 1122, chute, 113, tension block, 1131, tension block bevel, 1132, slider, 1133, adjustment screw, 114, top plate, 12, power shaft, 121, power shaft gear, 122, power shaft bearing, 13, lower roller, 131, lower roller eccentric, 1311, lower roller groove, 132, lower roller gear, 133, drive gear, 134, lower roller seat, 1341, lower roller bearing, 1342, lower roller bearing cover plate, 13421, lower roller bearing cover plate screw, 14, upper roller, 141, upper roller eccentric, 1411, upper roller groove, 142, upper roller gear, 143, upper roller seat, 1431, tension face, 1432, upper roller bearing cover plate, 1433, upper roller bearing, 14331, upper roller bearing, 15, roller hole, 16. 2. The sharpening driving mechanism, 21, a motor, 22, a first reduction gearbox, 221, a first reduction gearbox output shaft, 23, a second reduction gearbox 231, a second reduction gearbox input shaft, 232, a second reduction gearbox output shaft, 24, a first coupler and 25, and a second coupler; 3. steel pipe limit mechanism, 31, bracket, 311, bracket fixing plate, 3111, bracket fixing plate screw hole, 312, electric push cylinder push rod abdication hole, 313, guide sleeve limit hole, 314, electric push cylinder fixing screw hole, 32, electric push cylinder, 321, electric push cylinder push rod, 322, electric push cylinder flange, 3221, electric push cylinder flange screw, 33, electric push cylinder motor, 34, limit plate, 341, guide rod, 3411, guide sleeve, 35, insulating plate, 36, conductive plate, 37, induction switch; 5. a base; 6. seamless steel pipe.

Detailed Description

The following detailed description of specific embodiments of the utility model, while given in connection with the accompanying drawings, is not intended to limit the scope of the utility model, and any changes that may be made in the form of the inventive concepts described herein, without departing from the spirit and scope of the utility model.

In the following description, all concepts related to the directions or azimuths of up, down, left, right, front and rear are based on the position of fig. 1, and thus should not be construed as limiting the technical solution provided by the present utility model.

Referring to fig. 1, 2 and 3, the present utility model relates to a tip length control device of a tip rolling machine, comprising a base 5, a tip rolling mechanism 1 disposed on the base 5, and a tip rolling driving mechanism 2 in transmission connection with the tip rolling mechanism 1, wherein the tip rolling mechanism 1 comprises a pair of wall plates 11, a power shaft 12 rotatably disposed between the two wall plates 11, a lower tip rolling roller 13 rotatably disposed between the two wall plates 11 and above the power shaft 12, and an upper tip rolling roller 14 rotatably disposed between the two wall plates 11 and above the lower tip rolling roller 13, one end of the power shaft 12 is in transmission connection with one end of the lower tip rolling roller 13, the other end of the lower tip rolling roller 13 is in transmission connection with one end of the upper tip rolling roller 14, and the other end of the power shaft 12 is in transmission connection with the tip rolling driving mechanism 2.

The technical key points of the utility model are as follows: a steel pipe limiting mechanism 3 is fixed between the two wallboards 11 at the positions corresponding to the lower sharpening roller 13 and the upper sharpening roller 14, the steel pipe limiting mechanism 3 comprises a bracket 31 with two sides fixed with the wallboards 11, an electric push cylinder 32 fixed on the bracket 31, and an electric push cylinder motor 33 in transmission connection with the electric push cylinder 32, the electric push cylinder 32 forms an electric push cylinder push rod 321 at one side facing the lower sharpening roller 13 and the upper sharpening roller 14, a limiting plate 34 is fixed at the end part of the electric push cylinder push rod 321, an insulating plate 35 is fixed at one side facing the lower sharpening roller 13 and the upper sharpening roller 14, a conductive plate 36 is fixed at one side facing the lower sharpening roller 13 and the upper sharpening roller 14 of the insulating plate 35, an inductive switch 37 is arranged on the bracket 31, and the inductive switch 37 is respectively connected with the

conductive plates

36 and 11 in a conductive way. The above-mentioned inductive switch 37 is applied in various fields, and is a relatively mature electronic product, and the model thereof is not particularly limited herein, and a specific structural description is omitted. The limiting plate 34 is provided with a pair of limiting plate guide rods 341, one end of the limiting plate guide rods 341 passes through the bracket 31, and the bracket 31 is provided with a pair of guide sleeves 3411 for sliding the limiting plate guide rods 341. The electric push cylinder 32 is formed with a ring of electric push cylinder flange 322, and the electric push cylinder flange 322 is fixedly connected with the bracket 31 through a group of electric push cylinder flange screws 3221. The two sides of the bracket 31 are respectively provided with a bracket fixing plate 311, the bracket fixing plate 311 is provided with a pair of bracket fixing plate screw holes 3111, the bracket 31 is respectively screwed with the corresponding wall plate 11 through the bracket fixing plate screw holes 3111, the bracket 31 is provided with an electric push cylinder push rod abdicating hole 312 and a pair of guide sleeve limiting holes 313, the bracket 31 is provided with a circle of electric push cylinder fixing screw holes 314 around the electric push cylinder push rod abdicating hole 312, and the electric push cylinder fixing screw holes 314 are matched with electric push cylinder flange screws 3221. In an embodiment, a roll shaft seat cavity 111 with an upward opening is formed in the middle of the upper end of the wall plate 11, two ends of the lower roll tip roller 13 and the upper roll tip roller 14 are respectively rotatably disposed in a lower roll shaft seat 134 and an upper roll shaft seat 143, the lower roll shaft seat 134 is abutted against the lower side of the corresponding upper roll shaft seat 143, the lower roll shaft seat 134 and the upper roll shaft seat 143 are respectively disposed in the roll shaft seat cavity 111 on one side, a fixing block 112 is respectively fixed at the opening of the upper end of the roll shaft seat cavity 111, a tensioning block 113 is slidably disposed under the fixing block 112 in a front-rear direction, a tensioning block inclined surface 1131 is formed on the lower side of the tensioning block 113, an upper end surface of the upper roll shaft seat 143 is respectively formed with a tensioning surface 1431 matched with the tensioning block inclined surface 1131, the wall plate 11 is respectively disposed on a tip frame 16, the tip frame 16 is fixed on the base 5, two ends of the wall plate 11 respectively extend out of the two sides of the wall plate 12 and respectively and are respectively engaged with two ends of the power roller tip roller shaft 13, a power roller wheel 132 is disposed on the two ends of the lower roll tip roller shaft 13 and a power roller shaft 132 is rotatably engaged with the two ends of the tip roller 13, and a power roller wheel 132 is disposed on two ends of the tip roller 13 is rotatably engaged with the power roller wheel 132.

The front and rear sides of the fixed block 112 are respectively fixed to the corresponding wall plate 11 by a fixed block screw 1121, a sliding groove 1122 is formed at the lower end of the fixed block 112 along the front and rear direction, a sliding block 1132 sliding in the sliding groove 1122 is formed at the upper end of the tensioning block 113, an adjusting screw 1133 is respectively abutted to the front and rear sides of the tensioning block 113, and the adjusting screw 1133 is respectively connected to the wall plate 11 along the front and rear direction in a threaded manner.

A lower roller bearing 1341 is disposed in the lower roller shaft seat 134, the lower sharpening roller 13 is rotatably disposed in the lower roller bearing 1341, a lower roller bearing cover 1342 is disposed on each of the left and right sides of the lower roller shaft seat 134, the lower roller bearing cover 1342 is fixedly connected to the lower roller shaft seat 134 by a ring of lower roller bearing cover screws 13421, an upper roller bearing 1432 is disposed in the upper roller shaft seat 143, the upper sharpening roller 14 is rotatably disposed in the upper roller bearing 1432, an upper roller bearing cover 1433 is disposed on each of the left and right sides of the upper roller shaft seat 143, and the upper roller bearing cover 1433 is fixedly connected to the upper roller shaft seat 143 by a ring of upper roller bearing cover screws 14331.

With continued reference to fig. 1, the sharpening driving mechanism 2 includes a motor 21, a first reduction gearbox 22, and a second reduction gearbox 23, where the motor 21 is fixed on the first reduction gearbox 22 and is in transmission connection with each other, a first reduction gearbox output shaft 221 is formed on the first reduction gearbox 22, two ends of the second reduction gearbox 23 are respectively formed with a second reduction gearbox input shaft 231 and a second reduction gearbox output shaft 232, the first reduction gearbox 22 and the second reduction gearbox 23 are respectively fixed on the base 5, the first reduction gearbox output shaft 221 and the second reduction gearbox input shaft 231 are in transmission connection through a first coupling 24, and the second reduction gearbox output shaft 232 is in transmission connection with the other end of the power shaft 12 through a second coupling 25.

Further, a lower sharpening roller eccentric 131 and an upper sharpening roller eccentric 141 are formed on the lower sharpening roller 13 and the upper sharpening roller 14, a group of lower sharpening roller grooves 1311 and a group of upper sharpening roller grooves 1411 with different diameters are respectively formed on the lower sharpening roller eccentric 131 and the upper sharpening roller eccentric 141 at intervals, and the diameters of the lower sharpening roller grooves 1311 and the upper sharpening roller grooves 1411 which are opposite to each other are the same and are matched with each other to form the sharpening holes 15. A top plate 114 is fixed between the two wall plates 11, and two sides of the top plate 114 are respectively fixed on the tops of the wall plates 11 on the corresponding sides.

Referring to fig. 1, 2 and 3, when the seamless steel pipe 6 penetrates into the sharpening hole 15 to perform sharpening, the motor 21 rotates forward to make the lower sharpening roller 13 and the upper sharpening roller 14 rotate continuously and push the seamless steel pipe 6 to move to one side of the conductive plate 36, when the seamless steel pipe 6 touches the conductive plate 36, the seamless steel pipe 6 forms a loop with the conductive plate 36, the wallboard 11 and the inductive switch 37, the inductive switch 37 sends a signal to the electric push motor 33, the electric push motor 33 rotates forward to make the electric push rod 321 and the limiting plate 34 of the electric push cylinder 32, the insulating plate 35 and the conductive plate 36 move to a distance away from the side of the seamless steel pipe 6, wait for the seamless steel pipe 6 to move continuously and touch the conductive plate 36, and after a plurality of touches and the limiting plate 34 moves to a position of a set sharpening length, the inductive switch 37 sends a signal to make the motor 21 and the electric push cylinder motor 33 reverse to make the seamless steel pipe 6 exit from the sharpening hole 15, and at the same time the electric push motor 33 rotates reversely to make the electric push rod 321 and the limiting plate 34 and the insulating plate 35 reset the electric push rod 32. The process is sequentially and circularly repeated to finish the sharpening operation of a plurality of seamless steel pipes with equal length.

Claims

1. The utility model provides a sharp length control device is rolled to point machine, includes a base (5), a sharp mechanism (1) of setting on base (5) and one and sharp actuating mechanism (2) of rolling that are connected of sharp mechanism (1) transmission, sharp mechanism (1) include a pair of wallboard (11), a power shaft (12) of rotationally setting between two wallboard (11), a lower sharp roller (13) of rotationally setting between two wallboard (11) and being located power shaft (12) top and an upper sharp roller (14) of rotationally setting between two wallboard (11) and being located lower sharp roller (13) top, the one end of power shaft (12) is connected with the one end transmission of lower sharp roller (13), the other end of lower sharp roller (13) is connected with the one end transmission of last sharp roller (14), the other end of shaft (12) is connected with sharp actuating mechanism (2) transmission, its characterized in that: the two wallboard (11) are fixed with a steel pipe stop gear (3) in the position department that corresponds to lower roll (13) and last roll (14), steel pipe stop gear (3) include one both sides and wallboard (11) fixed support (31), one fix electric push cylinder (32) on support (31), one with electric push cylinder (32) transmission be connected electric push cylinder motor (33), electric push cylinder (32) are in one side constitution of roll (13) and last roll (14) down have an electric push cylinder push rod (321), the tip of electric push cylinder push rod (321) is fixed with a limiting plate (34), limiting plate (34) are fixed with an insulation board (35) in one side of roll (13) and last roll (14) down, insulation board (35) are fixed with a conducting plate (36) in one side of roll (13) and last roll (14) down, be provided with an inductive switch (37) on support (31), conducting plate (37) and conducting plate (36) are connected respectively.

2. A tip length control device for a tip rolling machine according to claim 1, wherein: a pair of limiting plate guide rods (341) are arranged on the limiting plate (34), one end of each limiting plate guide rod (341) penetrates through the corresponding support (31), and a pair of guide sleeves (3411) for the sliding of the corresponding limiting plate guide rods (341) are arranged on the corresponding support (31).

3. A tip length control device for a tip rolling machine according to claim 1, wherein: the electric pushing cylinder (32) is provided with a circle of electric pushing cylinder flange (322), and the electric pushing cylinder flange (322) is fixedly connected with the bracket (31) through a group of electric pushing cylinder flange screws (3221).

4. A tip length control device for a tip rolling machine according to claim 1, wherein: the two sides of the support (31) are respectively provided with a support fixing plate (311), a pair of support fixing plate screw holes (3111) are formed in the support fixing plates (311), the support (31) is respectively fixed with the corresponding wall plate (11) through the support fixing plate screw holes (3111), an electric pushing cylinder push rod abdicating hole (312) and a pair of guide sleeve limiting holes (313) are formed in the support (31), and a circle of electric pushing cylinder fixing screw holes (314) are formed in the support (31) around the electric pushing cylinder push rod abdicating hole (312).

5. A tip length control device for a tip rolling machine according to claim 1, wherein: the upper end middle part of wallboard (11) has offered a roller seat chamber (111) that the opening is ascending respectively, the both ends of lower sharp roller (13) and last sharp roller (14) are rotationally set up respectively in lower roller axle bed (134) and an last roller seat (143), lower roller axle bed (134) support and lean on the below of corresponding last roller axle seat (143), lower roller axle bed (134) and last roller seat (143) all set up in roller seat chamber (111) of corresponding one side, roller seat chamber (111) upper end opening department is fixed with a fixed block (112) respectively, the below of fixed block (112) is provided with a tight piece (113) that rises back and forth slidingly, the downside of tight piece (113) that rises is formed with a tight piece inclined plane (1131) that rises, the up end of last roller seat (143) is formed with one respectively with tight piece inclined plane (1131) complex face that rises (1431), wallboard (11) set up in a sharp frame (16) respectively relatively, the both ends of rolling frame (16) and power shaft (11) are passed through respectively and are rolled up between the wallboard (11) and the both sides of roll (11) are rolled in the roll respectively, the both ends of roll (11) are rolled up the wallboard (11) and are passed through respectively to the both sides of rolling shaft (11) and are rolled respectively, wallboard (11) of both sides extend respectively at the both ends of last roll (14), the one end of power shaft (12) is provided with a power shaft gear (121), the one end of lower roll (13) is provided with one and power shaft gear (121) engaged drive gear (133), the other end of lower roll (13) is provided with roll sharp roller gear (132) down, the one end of going up roll sharp roller (14) is provided with one and rolls sharp roller gear (142) on the meshing of sharp roller gear (132) down.

6. The tip length control device of a tip rolling machine according to claim 5, wherein: the front side and the rear side of the fixed block (112) are respectively fixed with the wallboard (11) on the corresponding side through a fixed block screw (1121), a chute (1122) is formed in the lower end of the fixed block (112) along the front-rear direction, a sliding block (1132) sliding in the chute (1122) is formed at the upper end of the tensioning block (113), an adjusting screw (1133) is respectively abutted to the front side and the rear side of the tensioning block (113), and the adjusting screw (1133) is respectively connected to the wallboard (11) along the front-rear direction in a threaded manner.

7. The tip length control device of a tip rolling machine according to claim 5, wherein: a lower roll shaft bearing (1341) is respectively arranged on the lower roll shaft seat (134), the lower sharp roll (13) is rotationally arranged in the lower roll shaft bearing (1341), lower roll shaft bearing cover plates (1342) are respectively arranged on the left side surface and the right side surface of the lower roll shaft seat (134), and the lower roll shaft bearing cover plates (1342) are respectively fixedly connected with the lower roll shaft seat (134) through a circle of lower roll shaft bearing cover plate screws (13421); an upper roll shaft bearing (1432) is respectively arranged in the upper roll shaft seat (143), the upper sharp roll (14) is rotationally arranged in the upper roll shaft bearing (1432), upper roll shaft bearing cover plates (1433) are respectively arranged on the left side surface and the right side surface of the upper roll shaft seat (143), and the upper roll shaft bearing cover plates (1433) are respectively fixedly connected with the upper roll shaft seat (143) through a circle of upper roll shaft bearing cover plate screws (14331).

8. A tip length control device for a tip rolling machine according to claim 1, wherein: the sharpening driving mechanism (2) comprises a motor (21), a first reduction gearbox (22) and a second reduction gearbox (23), wherein the motor (21) is fixed on the first reduction gearbox (22) and is in transmission connection with each other, a first reduction gearbox output shaft (221) is formed on the first reduction gearbox (22), a second reduction gearbox input shaft (231) and a second reduction gearbox output shaft (232) are respectively formed at two ends of the second reduction gearbox (23), the first reduction gearbox (22) and the second reduction gearbox (23) are respectively fixed on the base (5), the first reduction gearbox output shaft (221) and the second reduction gearbox input shaft (231) are in transmission connection through a first coupler (24), and the second reduction gearbox output shaft (232) is in transmission connection with the other end of the power shaft (12) through a second coupler (25).

9. A tip length control device for a tip rolling machine according to claim 1, wherein: the lower sharpening roll (13) and the upper sharpening roll (14) are provided with a lower sharpening roll eccentric wheel (131) and an upper sharpening roll eccentric wheel (141), a group of lower sharpening roll grooves (1311) and a group of upper sharpening roll grooves (1411) with different diameters are respectively arranged on the lower sharpening roll eccentric wheel (131) and the upper sharpening roll eccentric wheel (141) at intervals, and the diameters of the lower sharpening roll grooves (1311) and the upper sharpening roll grooves (1411) which are opposite are the same and are matched with each other to form sharpening holes (15).

10. A tip length control device for a tip rolling machine according to claim 1, wherein: a top plate ((114)) is fixed between the two wallboards ((11)), and two sides of the top plate ((114)) are respectively fixed on the tops of the wallboards ((11)) on the corresponding sides.