CN214639105U - Seamless pipe reducing device - Google Patents

Abstract

The utility model discloses a seamless pipe undergauge device, include: the frame is provided with a plurality of sizing mechanisms and pipe wall plastic mechanism in the frame, sizing mechanism includes: the device comprises a first fixed seat, three oil cylinder seats are uniformly arranged on the first fixed seat at intervals, a first push-pull oil cylinder is respectively fixed on each of the three oil cylinder seats, and the three first push-pull oil cylinders are respectively connected with three sizing wheels with arc-shaped grooves; the pipe wall shaping mechanism comprises: the second fixing seat is hinged with four clamping arms at uniform intervals, roller grooves are formed in the clamping ends of the four clamping arms, a compression roller is obliquely and rotatably arranged in each roller groove, a pull rod is hinged between every two adjacent clamping arms, and a second push-pull oil cylinder is arranged on the second fixing seat and hinged with any one of the clamping arms. The utility model has the advantages that: not only improves the working efficiency, but also improves the quality of the outer surface of the seamless pipe.

Description

Seamless pipe reducing device

Technical Field

The utility model relates to a seamless pipe undergauge device.

Background

The purpose of reducing the diameter of the seamless pipe is to roll the seamless pipe blank into a seamless pipe with dimensional accuracy and roundness meeting the requirements under the conditions of smaller total reducing ratio and smaller single reducing ratio, and improve the quality of the outer surface of the seamless pipe. At present, after a seamless pipe on the market is subjected to sizing, the diameter deviation is small, the ovality is small, the straightness is good, and the surface is smooth and clean.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can be according to seamless pipe's actual diameter quick adjustment sizing through-hole's seamless pipe undergauge device.

In order to achieve the above object, the utility model adopts the following technical scheme: a diameter reducing device for a seamless pipe, comprising: the frame is provided with a plurality of sizing mechanisms and pipe wall plastic mechanism in the frame, sizing mechanism includes: the sizing device comprises a frame, a first fixing seat fixedly arranged on the frame, wherein the first fixing seat is provided with sizing through holes, the first fixing seat is uniformly provided with three oil cylinder seats at intervals around the sizing through holes, the three oil cylinder seats are respectively and fixedly provided with a first push-pull oil cylinder, the central axes of output shafts of the three first push-pull oil cylinders are intersected at the circle center of the sizing through holes, the output shafts of the three first push-pull oil cylinders are respectively connected with a wheel seat, and a sizing wheel with an arc-shaped groove is respectively and rotatably arranged in the three wheel seats; the pipe wall shaping mechanism comprises: the fixed second fixing base that sets up in the frame, be provided with the poling hole on the second fixing base, the central axis of poling hole coincides with the central axis of sizing through-hole mutually, it has four centre gripping arms to articulate round the even interval of poling hole on the second fixing base, four centre gripping arms are articulated mutually with the second fixing base through four articulated shafts respectively, the exposed core of four centre gripping arms all stretches to the poling hole, all be provided with the roller groove on the exposed core of four centre gripping arms, it is provided with the compression roller to rotate in the slant in the roller groove, it has the pull rod to articulate between every two adjacent centre gripping arms, be provided with second push-and-pull oil cylinder on the second fixing base, be provided with articulated piece in the outer end of arbitrary one centre gripping arm, output shaft on the second push-and-pull oil cylinder is articulated mutually with articulated piece.

Further, in the seamless pipe diameter reducing apparatus, the cylinder block includes: the two fixing plates are fixed on the first fixing seat through bolts, a gap is reserved between the two fixing plates, and a guide hole seat with a guide hole is connected between the two fixing plates; the first push-pull oil cylinder is connected with the two fixing plates, an output shaft on the first push-pull oil cylinder is movably arranged in a gap between the two fixing plates, a guide pillar matched with the guide hole in the guide hole seat is arranged on the wheel seat, and the guide pillar penetrates through the guide hole and then is connected with the output shaft on the first push-pull oil cylinder.

Further, according to the seamless pipe reducing device, the guide post is connected with the output shaft of the first push-pull oil cylinder through the coupler.

Further, aforementioned seamless pipe undergauge device, wherein, the output shaft on the second push-and-pull hydro-cylinder and the connection structure between the articulated piece are: an open slot is arranged in the hinged block, a rotating shaft penetrates through the open slot, a first connecting rod penetrates through the rotating shaft in a movable mode, and the first connecting rod is connected with an output shaft on the second push-pull oil cylinder through threads.

Further, the seamless pipe diameter reducing apparatus described above, wherein the tie bar includes: two hinged joints and a second connecting rod, two hinged joints are respectively hinged on two adjacent clamping arms, a forward-rotation threaded hole and a reverse-rotation threaded hole are respectively arranged on the two hinged joints, a forward-rotation external thread and a reverse-rotation external thread are respectively arranged at two ends of the second connecting rod, the forward-rotation external thread on the second connecting rod is in threaded connection with the hinged joint provided with the forward-rotation threaded hole, and the reverse-rotation external thread on the second connecting rod is in threaded connection with the hinged joint provided with the reverse-rotation threaded hole.

The utility model has the advantages that: the three first push-pull oil cylinders can simultaneously adjust the positions of the three sizing wheels according to the outer diameter of the seamless pipe, so that the inner diameter size of an extrusion hole formed by the three sizing wheels is adjusted, and the working efficiency is improved; the pipe wall shaping mechanism is arranged to round and shape the reduced seamless pipe, so that the quality of the outer surface of the seamless pipe is improved.

Drawings

Fig. 1 is a schematic structural view of a seamless pipe diameter reducing device according to the present invention.

Fig. 2 is a schematic structural view of the sizing mechanism of fig. 1.

Fig. 3 is a schematic sectional view in the direction of a-a in fig. 2.

Fig. 4 is a schematic structural view of the pipe wall shaping mechanism in fig. 1.

Fig. 5 is a schematic structural view of a connection structure between the roller groove and the pressing roller in the grip arm of fig. 4.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and preferred embodiments.

As shown in fig. 1, 2, 3, 4, and 5, the seamless pipe diameter reducing apparatus according to the present invention includes: frame 1 is provided with a plurality of sizing mechanisms 2 and pipe wall plastic mechanism 3 in frame 1, sizing mechanism 2 includes: the first fixing seat 21 is fixedly arranged on the rack 1, the first fixing seat 21 is provided with sizing through holes 22, the first fixing seat 21 is provided with three oil cylinder seats 4 at intervals around the sizing through holes 22, the three oil cylinder seats 4 are respectively and fixedly provided with a first push-pull oil cylinder 5, the central axis of the output shaft of each first push-pull oil cylinder 5 intersects at the center of the sizing through hole 22, the output shafts of the three first push-pull oil cylinders 5 are respectively connected with a wheel seat 6, and the three wheel seats 6 are respectively and rotatably provided with a sizing wheel 61 with an arc-shaped groove. The three first push-pull oil cylinders 5 respectively drive the corresponding sizing wheels 61 simultaneously, so that an extrusion hole capable of extruding the seamless tube blank is formed among the three sizing wheels 61, the inner diameter size of the extrusion hole is the outer diameter size of the seamless tube, and after the seamless tube blank enters the roll hole, the three sizing wheels 61 uniformly apply extrusion force to the outer surface of the seamless tube blank, so that the outer diameter of the seamless tube blank is reduced, and the seamless tube with the required outer diameter size is finally obtained.

The pipe wall shaping mechanism 3 includes: the second fixing seat 31 is fixedly arranged on the rack 1, a pipe penetrating hole 32 is formed in the second fixing seat 31, the central axis of the pipe penetrating hole 32 coincides with the central axis of the sizing through hole 22, four clamping arms 33 are hinged to the second fixing seat 31 around the pipe penetrating hole 32 at uniform intervals, the four clamping arms 33 are hinged to the second fixing seat 31 through four hinge shafts 311 respectively, clamping ends of the four clamping arms 33 extend to the pipe penetrating hole 32, roller grooves 34 are formed in the clamping ends of the four clamping arms 33, compression rollers 35 are arranged in the roller grooves 34 in a tilted rotating mode, a pull rod 7 is hinged between every two adjacent clamping arms 33, a second push-pull oil cylinder 8 is arranged on the second fixing seat 31, a hinge block 331 is arranged at the outer end of any one clamping arm 33, and an output shaft of the second push-pull oil cylinder 8 is hinged to the hinge block 331. The second push-pull oil cylinder 8 pushes the hinged block 331 downwards, the hinged block 331 drives the clamping arm 33 connected with the hinged block to rotate around the corresponding hinged shaft 311, the clamping arm 33 drives the other three clamping arms 33 to synchronously and unidirectionally rotate through the pull rod 7, a pressing roller hole is formed among the pressing rollers 35 on the four clamping arms 33, after a seamless pipe enters the pressing roller hole after diameter reduction of the sizing mechanisms 2, the seamless pipe continuously moves rightwards to drive the four pressing rollers 35 to rotate, because the four pressing rollers 35 are obliquely arranged, the four pressing rollers 35 can generate deviation traction force while rotating, and the deviation traction force can drive the seamless pipe to rotate, so that the four pressing rollers 35 can polish the surface of the seamless pipe under rotation, and the quality of the outer surface of the seamless pipe is improved.

In this embodiment, the cylinder block 4 includes: the two fixing plates 41 are fixed on the first fixing seat 21 through bolts, a gap is reserved between the two fixing plates 41, and a guide hole seat 42 with a guide hole is connected between the two fixing plates 41; the first push-pull oil cylinder 5 is connected with the two fixed plates 41, an output shaft on the first push-pull oil cylinder 5 is movably arranged in a gap between the two fixed plates 41, a guide post 62 matched with the guide hole in the guide hole seat 42 is arranged on the wheel seat 6, and the guide post 62 penetrates through the guide hole and then is connected with the output shaft on the first push-pull oil cylinder 5 through a coupler 51.

In this embodiment, the connection structure between the output shaft of the second push-pull oil cylinder 8 and the hinge block 331 is as follows: an open slot is arranged in the hinge block 331, a rotating shaft 332 is arranged in the open slot in a penetrating manner, a first connecting rod 333 is movably arranged on the rotating shaft 332 in a penetrating manner, and the first connecting rod 333 is connected with an output shaft on the second push-pull oil cylinder 8 through threads.

In this embodiment, the tie rod 7 includes: two hinged joints 71 and a second connecting rod 72, the two hinged joints 71 are respectively hinged on two adjacent clamping arms 33, the two hinged joints 71 are respectively provided with a forward-rotation threaded hole and a backward-rotation threaded hole, two ends of the second connecting rod 72 are respectively provided with a forward-rotation external thread and a backward-rotation external thread, the forward-rotation external thread on the second connecting rod 72 is in threaded connection with the hinged joint 71 provided with the forward-rotation threaded hole, the backward-rotation external thread on the second connecting rod 72 is in threaded connection with the hinged joint 71 provided with the backward-rotation threaded hole, when the two hinged joints 71 are respectively hinged on the two clamping arms 33, the second connecting rod 72 can be simultaneously connected with or loosened from the two hinged joints 71 by the forward-rotation or backward-rotation second connecting rod 72, and the installation and the disassembly are convenient.

The utility model has the advantages that: the three first push-pull oil cylinders can simultaneously adjust the positions of the three sizing wheels according to the outer diameter of the seamless pipe, so that the inner diameter size of an extrusion hole formed by the three sizing wheels is adjusted, and the working efficiency is improved; the pipe wall shaping mechanism is arranged to round and shape the reduced seamless pipe, so that the quality of the outer surface of the seamless pipe is improved.

Claims (5)

1. A diameter reducing device for a seamless pipe, comprising: the frame, its characterized in that: be provided with a plurality of sizing mechanisms and pipe wall plastic mechanism in the frame, sizing mechanism includes: the sizing device comprises a frame, a first fixing seat fixedly arranged on the frame, wherein the first fixing seat is provided with sizing through holes, the first fixing seat is uniformly provided with three oil cylinder seats at intervals around the sizing through holes, the three oil cylinder seats are respectively and fixedly provided with a first push-pull oil cylinder, the central axes of output shafts of the three first push-pull oil cylinders are intersected at the circle center of the sizing through holes, the output shafts of the three first push-pull oil cylinders are respectively connected with a wheel seat, and a sizing wheel with an arc-shaped groove is respectively and rotatably arranged in the three wheel seats; the pipe wall shaping mechanism comprises: the fixed second fixing base that sets up in the frame, be provided with the poling hole on the second fixing base, the central axis of poling hole coincides with the central axis of sizing through-hole mutually, it has four centre gripping arms to articulate round the even interval of poling hole on the second fixing base, four centre gripping arms are articulated mutually with the second fixing base through four articulated shafts respectively, the exposed core of four centre gripping arms all stretches to the poling hole, all be provided with the roller groove on the exposed core of four centre gripping arms, it is provided with the compression roller to rotate in the slant in the roller groove, it has the pull rod to articulate between every two adjacent centre gripping arms, be provided with second push-and-pull oil cylinder on the second fixing base, be provided with articulated piece in the outer end of arbitrary one centre gripping arm, output shaft on the second push-and-pull oil cylinder is articulated mutually with articulated piece.

2. The seamless pipe diameter reducing apparatus according to claim 1, wherein: the cylinder block includes: the two fixing plates are fixed on the first fixing seat through bolts, a gap is reserved between the two fixing plates, and a guide hole seat with a guide hole is connected between the two fixing plates; the first push-pull oil cylinder is connected with the two fixing plates, an output shaft on the first push-pull oil cylinder is movably arranged in a gap between the two fixing plates, a guide pillar matched with the guide hole in the guide hole seat is arranged on the wheel seat, and the guide pillar penetrates through the guide hole and then is connected with the output shaft on the first push-pull oil cylinder.

3. The seamless pipe diameter reducing apparatus according to claim 2, wherein: the guide post is connected with an output shaft on the first push-pull oil cylinder through a coupler.

4. A diameter reducing device for a seamless pipe according to claim 1, 2 or 3, wherein: the connecting structure between the output shaft on the second push-pull oil cylinder and the hinge block is as follows: an open slot is arranged in the hinged block, a rotating shaft penetrates through the open slot, a first connecting rod penetrates through the rotating shaft in a movable mode, and the first connecting rod is connected with an output shaft on the second push-pull oil cylinder through threads.

5. A diameter reducing device for a seamless pipe according to claim 1, 2 or 3, wherein: the draw bar includes: two hinged joints and a second connecting rod, two hinged joints are respectively hinged on two adjacent clamping arms, a forward-rotation threaded hole and a reverse-rotation threaded hole are respectively arranged on the two hinged joints, a forward-rotation external thread and a reverse-rotation external thread are respectively arranged at two ends of the second connecting rod, the forward-rotation external thread on the second connecting rod is in threaded connection with the hinged joint provided with the forward-rotation threaded hole, and the reverse-rotation external thread on the second connecting rod is in threaded connection with the hinged joint provided with the reverse-rotation threaded hole.

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