CN212442583U

CN212442583U - Full-automatic continuous cold pilger mill

Info

Publication number: CN212442583U
Application number: CN202021212301.8U
Authority: CN
Inventors: 方健; 虞洵宏; 邵国平
Original assignee: Ningbo Donzhong Mechanical Co ltd
Current assignee: Ningbo Donzhong Mechanical Co ltd
Priority date: 2020-06-28
Filing date: 2020-06-28
Publication date: 2021-02-02
Anticipated expiration: 2030-06-28

Abstract

The utility model discloses a full-automatic continuous cold pilger mill, which comprises a frame and a driving mechanism, back lathe bed and preceding lathe bed have set gradually in the frame, the rear end of back lathe bed is provided with back core bar chucking device, be provided with middle core bar chucking device between back lathe bed and the preceding lathe bed, be provided with push mechanism on the back lathe bed, be provided with the embracing mechanism on the preceding lathe bed, through adopting two lathe beds, the preceding lathe bed that is close to the work frame adopts the embracing, the external diameter of hugging the pipe advances the structure, make the dolly of embracing advance or move back work, the back lathe bed that is close to back core bar chucking device adopts the push structure that has three kinds of working modes, make the dolly advance, follow-up or move back work, realize the continuous cold rolling of cold pilger mill, simple structure not only, low in manufacturing cost, the length reduction of equipment, save area; and the total length of the core rod is very obvious for improving the processing efficiency and the quality of the small-specification pipe.

Description

Full-automatic continuous cold pilger mill

Technical Field

The utility model relates to the technical field of machinery, especially, relate to a full-automatic cold pilger mill in succession.

Background

With the rapid development of national economy and the continuous expansion of new technical fields, the application range of cold-rolled pipes is wider and wider, the requirements on the variety quality of the cold-rolled pipes are higher and higher, particularly the development of industries such as aviation, rocket, automobile, shipbuilding and the like, so that the requirements on various precise, thin-wall and high-strength cold-rolled pipes are higher and higher, and the production of the pipes is mainly a cold-rolled pipe machine at present.

The cold pilger mill is a mechanical process equipment for cold rolling pierced billets by using ring pass, has better cogging performance, can roll nonferrous metal seamless tubes with common precision, and has the biggest characteristic of high material utilization rate, and the precision and the surface roughness are superior to those of a cold drawing mill.

The feeding and discharging of the traditional cold pilger mill are completed manually, when one blank tube is rolled and a second blank tube is placed, the blank tube which is placed on the feeding frame in advance is lifted manually and then placed on the blank holder, an operator leaves the operating platform and walks to the side of the feeding frame to complete the feeding work, and only one tube is processed and then the next tube is processed, the pure manual processing mode has high labor intensity, long consumption time and low production efficiency, is not beneficial to the production of a production line, cannot expand the production scale, causes economic benefit loss, in the prior art, the full-automatic cold pilger mill generally uses two holding and conveying trolleys and a lathe bed, and additionally adds an auxiliary feeding lathe bed, though the manual work can be replaced by an automatic feeding and automatic discharging mechanism, thereby providing the production efficiency, but the total length of the equipment is longer, so that the core rod has a longer length. Especially for processing small-bore pipes, if the core rod length of the core rod is longer, the influence on the rolling speed of the pipes and the quality of the pipes is more obvious, and the product percent of pass is lower.

SUMMERY OF THE UTILITY MODEL

The utility model discloses it is not enough to prior art, provide a full-automatic cold pilger mill in succession, reduce the whole length of equipment, improve the field utilization ratio, can make plug core bar length subtract the weak point moreover, increase substantially tubular product machining efficiency and pipe quality.

In order to solve the technical problem, the utility model discloses a following technical scheme can realize: the utility model provides a full-automatic continuous cold pilger mill, includes frame and actuating mechanism, the frame on set gradually back lathe bed and preceding lathe bed, be located the rear end of back lathe bed is provided with back core bar chucking device, be located back lathe bed with be provided with middle core bar chucking device between the preceding lathe bed, be provided with on the back lathe bed along reciprocating motion's push mechanism in the back lathe bed working direction, be provided with on the preceding lathe bed along reciprocating motion in the preceding lathe bed working direction and with the embracing transport mechanism of push mechanism cooperation action.

In the technical scheme, the auxiliary device comprising the slewing mechanism and the feeding mechanism is arranged at the front end of the middle core rod clamping device.

In the above technical solution, the auxiliary device includes a feeding driving motor and a driving matching mechanism.

In the above technical scheme, the pushing mechanism includes a pushing seat, a pushing driving assembly, a clamping block and a clamping block moving mechanism.

In the technical scheme, the holding and conveying mechanism comprises a holding and conveying seat and a clamping jaw, and the arc surface on the inner side of the clamping jaw is matched with the outer diameter of the pipe blank.

Among the above-mentioned technical scheme, back lathe bed includes back lathe bed body, back guide rail and conveying assembly.

In the above technical scheme, the front bed body comprises a front bed body, a support frame, a screw rod, a front guide rail and a transmission shaft device.

In the above technical scheme, the driving mechanism is arranged at the foremost end of the rack and is connected with the pedestal box through the transmission mechanism.

Compared with the prior art, the method has the following beneficial effects: the cold rolling mill has the advantages that the two machine beds are adopted, the front machine bed close to the working rack adopts embracing feeding to tightly embrace the outer diameter feeding structure of the pipe blank, the motor drives the screw rod nut mechanism to enable the embracing trolley to feed or fast retreat through a gear or worm gear speed reducing mechanism, the rear machine bed close to the rear core rod clamping device adopts a pushing structure with three working modes, the pushing trolley is enabled to feed, follow or fast retreat, and continuous cold rolling of the cold rolling pipe is realized; and the total length of the core rod is very obvious for improving the processing efficiency and the quality of the small-specification pipe.

Drawings

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

Fig. 2 is a top view of the present invention.

Fig. 3 is a schematic structural view of the holding mechanism.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 3, a full-automatic continuous cold pilger mill comprises a frame 1 and a driving mechanism 2, wherein a rear bed body 3 and a front bed body 4 are sequentially arranged on the frame, a rear core bar clamping device 51 is arranged at the rear end of the rear bed body 3, a middle core bar clamping device 52 is arranged between the rear bed body 3 and the front bed body 4, a pushing mechanism 6 reciprocating along the working direction of the rear bed body 3 is arranged on the rear bed body 3, and a holding mechanism 7 reciprocating along the working direction of the front bed body 4 and acting in cooperation with the pushing mechanism 6 is arranged on the front bed body 4.

The rear core rod clamping device is connected with the core rod device 511, and three clamping jaws are arranged in a hollow shaft of the rear core rod clamping device. When the mandrel device is clamped, the clamping jaw moves towards the center, the T-shaped boss on the clamping jaw is embedded into the clamping groove on the tail of the mandrel device, and the clamping jaw in the hollow shaft drives the mandrel device to do clearance rotary motion. When the pipe blank is loosened, the clamping jaws move outwards, the T-shaped bosses on the clamping jaws are separated from the clamping grooves in the tail of the core rod device and retreat into the hollow shaft, so that the pipe blank can pass through the clamping grooves, and the core rod device 511 is connected with the core rod, the middle clamping groove and the tail clamping groove through the core rod. The core rod mainly plays a role in the deformation of the inner hole of the tube blank, so that the finished tube meets the specified requirements. The middle clamping groove and the tail clamping groove are meshed with clamping jaws in the middle core rod clamping device and the rear core rod clamping device, and when the middle clamping groove and the tail clamping groove are operated alternately, the feeding of the tube blank and the clearance rotary motion of the core rod device are controlled.

An auxiliary device comprising a pivoting mechanism 81 and a feed mechanism 82 is provided at the front end of the intermediate mandrel clamping device 52. The auxiliary device comprises a feeding driving motor 83 and a driving matching mechanism, and the driving matching mechanism can be a gear mechanism or a worm and gear mechanism.

The whole machine can adopt one or more sets of rotating devices, and if the plurality of sets of rotating devices are adopted, the action consistency of the plurality of sets of rotating devices is ensured, namely the starting and stopping work are finished simultaneously, and the rotating is carried out at the same angle. The turning device is driven by a driving motor 83, the tail part, the middle core bar clamping device, the holding and conveying mechanism 7 and other auxiliary turning mechanisms are driven to do clearance turning work by a transmission shaft of a driving matching mechanism, and other auxiliary turning mechanisms are mostly arranged on a machine box seat, so that the tube blank and the finished tube complete turning work in the front limit position range and the rear limit position range of the machine frame at the same time, and the screw rod nut mechanism is driven to respectively control the holding and conveying trolley in the front machine body to do clearance feeding work or quick retraction work.

The feeding mechanism 82 is also configured to be driven by a set of feeding motor and a driving gear mechanism or a worm and gear mechanism.

The rear lathe bed comprises a rear lathe bed body 31, a rear guide rail 32 and a transmission assembly, and the front lathe bed comprises a front lathe bed body 41, a support frame 42, a screw rod, a front guide rail 43 and a transmission shaft device.

The driving mechanism 2 is arranged at the foremost end of the frame 1 and is connected with the frame box 9 through a transmission mechanism.

The pushing mechanism 6 comprises a pushing seat 61, a pushing driving component 62, a clamping block 63 and a clamping block moving mechanism 64, the pushing mechanism 6 linearly moves forwards and backwards in the rear lathe bed provided with the rear guide rail 32, the power of the pushing mechanism 6 is transmitted by a servo motor arranged on the pushing mechanism 6 through a transmission component, and the transmission component can adopt a gear and rack mode; of course, the pushing mechanism 6 can be driven to move linearly back and forth by a servo motor arranged at a fixed position through a chain wheel and chain mechanism. The pushing mechanism 6 is provided with a pair of block moving mechanisms, the front parts of the blocks are semicircular, and the arc diameter of the blocks is 1 to 2 mm larger than the diameter of the core rod.

The holding and conveying mechanism 7 comprises a holding and conveying seat and a clamping jaw, and the arc surface on the inner side of the clamping jaw is matched with the outer diameter of the pipe blank. When the clamping jaws are clamped, the clamping jaws move towards the center, the inner arc surfaces on the clamping jaws press the outer arc surfaces of the tube blanks, the feeding mechanism 82 transmits power to the holding and feeding mechanism 7 through the lead screw nut mechanism, the rotating mechanism 81 transmits power to the holding and feeding mechanism 7 through the transmission shaft, so that the holding and feeding mechanism 7 rotates and feeds the tube blanks into a rolling area in the base box 9 continuously under the clamping of the clamping jaws of the holding and feeding mechanism 7 along the front guide rail 43 of the front lathe bed without stopping working gaps, and the rolling work is finished.

The specific process is as follows: the pushing mechanism and the holding mechanism both adopt a trolley form.

The pipe blank is fed and enters in the arrow direction in fig. 2, at the moment, the clamping jaws of the rear core rod clamping device 51 are in a loose state, the clamping jaws move outwards, the T-shaped bosses on the clamping jaws are separated from the clamping grooves on the tail portion of the core rod device and retreat into the hollow shaft, so that the pipe blank can pass through the pipe blank conveniently, and the pipe blank is controlled to be fed to the position of the pushing trolley through the mutual alternate operation of the rear core rod clamping device and the core rod device.

The pushing trolley has three working modes: a) the moment working mode is that the pushing trolley moves forwards or backwards at a set moment at a constant speed; b) the feeding working mode is that the pushing trolley performs clearance feeding motion; c) and in the fast-backward mode, the pushing trolley is fast backward at a higher speed.

The working process of the pushing trolley and the holding trolley is as follows:

1) when the front end of the pushed pipe blank A touches the tail end of the previous pipe blank being rolled, the pushing trolley moves forward along with the previous pipe blank in a clearance mode;

2) when the holding and conveying trolley works to the front limit position of the front lathe bed, the pushing trolley is converted into a feeding working mode, then the holding and conveying trolley loosens the pipe blank, then the holding and conveying trolley returns backwards, when the holding and conveying trolley returns to the rear limit position of the front lathe bed, the holding and conveying trolley starts to feed at once, meanwhile, the clamping mechanism is started to clamp the pipe blank to feed forwards, and at the moment, the system converts the pushing trolley into a torque working mode to push the pipe blank to follow forwards. Thus, the tube blank is continuously conveyed to the working rack in the machine base box for rolling under the alternate work of the pushing trolley and the holding trolley, and the continuous rolling work is realized;

3) when the pushing trolley moves to the front limit position of the rear lathe bed, the holding trolley starts to work, then the pushing trolley starts a quick return mode, quickly returns, and stops moving until the pushing trolley moves to the rear limit position of the rear lathe bed. When the pushing trolley moves backwards, the clamping block moving mechanism moves outwards to enable the clamping block to be in an open state; then the rear core rod clamping device is opened, and the feeding device penetrates the tube blank into the core rod device and then forwards sends the tube blank to the front part of a clamping block of the pushing trolley;

4) the clamping blocks of the clamping block moving mechanism of the pushing trolley move towards the center and are closed, then a servo motor arranged on the pushing trolley starts a torque working mode, the pushing trolley is driven by a gear rack to push the tail end of the tube blank to move forwards at a constant speed, and the tube blank is pushed to follow forwards until the tail end of the previous tube blank. The full-automatic feeding and rolling process of the tube blank is realized under the cooperative work of the holding trolley, the pushing trolley and the feeding device.

Three clamping jaws are arranged in a hollow shaft of the holding and feeding trolley, the inner side of each clamping jaw is provided with an inner arc surface close to the outer diameter of the tube blank, when the clamping jaws are clamped tightly, the clamping jaws move towards the center, the inner arc surfaces on the clamping jaws press the outer arc surface of the tube blank, the feeding mechanism 82 transmits power to the holding and feeding mechanism 7 through the lead screw nut mechanism, the rotating mechanism 81 transmits power to the holding and feeding mechanism 7 through the transmission shaft, so that the holding and feeding mechanism 7 rotates and feeds the tube blank into a rolling area in the machine base box 9 continuously along the front guide rail 43 of the front machine body through the holding and feeding base, and the tube blank is clamped by the clamping jaws of the holding and. When the holding trolley reaches the front limit of the front lathe bed, the pushing trolley of the rear lathe bed is converted into a feeding mode, the tube blank is pushed against the rear end of the tube blank to continue to be fed forward at a clearance, then a clamping jaw of the holding trolley moves outwards to loosen the tube blank, the tube blank is driven by the feeding device to quickly move back to the rear limit of the front lathe bed, then the feeding work is started immediately, meanwhile, the clamping mechanism is started to clamp the tube blank to be fed forward, and at the moment, the system converts the pushing trolley into a torque mode to push the tube blank to follow forward. Therefore, the tube blank is continuously fed into the machine base box under the alternate work of the pushing trolley and the holding trolley, and the continuous rolling work is realized.

In the whole process, power drives a machine seat frame hinged on a crank connecting rod to do reciprocating linear motion through a driving mechanism 2, an upper pair of bearing blocks and a lower pair of bearing blocks are arranged on the machine seat frame, rollers are arranged on shafts of the bearing blocks, and gears are arranged at one ends of the shafts. A rack is fixed on the side surface of a machine base box 10, a driving mechanism 2 adopts a motor, the power of the motor is transmitted to a gear mechanism in the machine base box 10 through a transmission mechanism such as a belt pulley mechanism or a speed reducer mechanism, and then a crank connecting rod mechanism is driven, so that a machine frame hinged at one end of a connecting rod makes reciprocating linear motion in a guide rail of the machine base box, and when the machine base frame makes reciprocating linear motion in the machine base box, a pair of rollers in upper and lower bearing seats on the machine frame are driven to make reciprocating rotary motion through a rack-and-pinion mechanism. The circumference of the roller is provided with a continuous semi-hole type variable cross-section groove, so that the roller continuously rolls the tube blank in the reciprocating motion of the frame, the outer diameter of the tube blank continuously deforms from large to small, and the size requirement of a user is met; meanwhile, the core rod is arranged at the front end of the core rod device and works in the same interval with the roller, so that the inner diameter of the tube blank can be continuously deformed from large to small to meet the requirement. In a range of front and back limit positions of the frame, the tube blank is driven by the rotary feeding device to feed forward a displacement amount and rotate by an angle, so that the tube blank can be continuously deformed and processed in cycles to finish the rolling process of the finished tube.

The protection scope of the present invention includes but is not limited to the above embodiments, the protection scope of the present invention is subject to the claims, and any replacement, deformation, and improvement that can be easily conceived by those skilled in the art made by the present technology all fall into the protection scope of the present invention.

Claims

1. The utility model provides a full-automatic continuous cold pilger mill, includes frame (1) and actuating mechanism (2), the frame on set gradually back lathe bed (3) and preceding lathe bed (4), be located the rear end of back lathe bed (3) is provided with back core bar chucking device (51), is located back lathe bed (3) with be provided with middle core bar chucking device (52) between preceding lathe bed (4), its characterized in that, be provided with on back lathe bed (3) and follow reciprocating motion's push mechanism (6) in back lathe bed (3) working direction, be provided with on preceding lathe bed (4) along reciprocating motion in preceding lathe bed (4) working direction and with embrace feed mechanism (7) of push mechanism (6) cooperation action.

2. The fully automatic continuous cold pilger mill according to claim 1, characterized in that auxiliary devices including a swing mechanism (81) and a feed mechanism (82) are provided at the front end of the intermediate mandrel clamping device (52).

3. The automatic continuous cold pilger mill of claim 2, wherein said auxiliary devices include a feed drive motor (83) and a drive engagement mechanism.

4. The full-automatic continuous cold pilger mill according to claim 1, characterized in that the pushing mechanism (6) comprises a pushing seat (61), a pushing driving assembly (62), a clamping block (63) and a clamping block moving mechanism (64).

5. The full-automatic continuous cold pilger mill according to claim 1, characterized in that the holding mechanism (7) comprises a holding seat and a clamping jaw, and the arc surface at the inner side of the clamping jaw is matched with the outer diameter of the tube blank.

6. The full-automatic continuous cold pilger mill according to claim 1, characterized in that the rear bed comprises a rear bed body (31), a rear guide rail (32) and a transfer assembly.

7. The full-automatic continuous cold pilger mill according to claim 1, characterized in that the front bed body comprises a front bed body (41), a support frame (42), a lead screw, a front guide rail (43) and a transmission shaft device.

8. The full-automatic continuous cold pilger mill according to claim 1, characterized in that the driving mechanism (2) is arranged at the foremost end of the stand (1) and is connected with the stand box (9) through a transmission mechanism.