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CN-122007493-A - Automatic corrugated pipe cutting device and method

CN122007493ACN 122007493 ACN122007493 ACN 122007493ACN-122007493-A

Abstract

The invention relates to the technical field of automatic cutting, in particular to an automatic corrugated pipe cutting device and method, wherein the device comprises the following components: the automatic corrugated pipe cutting device comprises a corrugated pipe body, a feeding mechanism, a cutting mechanism and a positioning clamping mechanism, wherein the feeding mechanism and the cutting mechanism are sequentially arranged along the feeding direction, the feeding mechanism intermittently conveys the corrugated pipe body according to a fixed length through a profiling guide conveying assembly, the positioning clamping mechanism is positioned between the feeding mechanism and the cutting mechanism and used for radially clamping and fixing the corrugated pipe body, the positioning clamping mechanism is provided with an axial positioning structure which is clamped into a corrugated groove of the corrugated pipe body so that at least part of axial sections of the corrugated pipe body are limited to stretch and retract, and the cutting mechanism performs cutting at a target corrugated phase position of the corrugated pipe body. The invention realizes stable and reliable fixed-length positioning, reduces deformation risk in the machining process by profiling clamping constraint, improves cutting quality and end face consistency, improves automation degree and production efficiency, and has wide application range and convenient structure adjustment.

Inventors

  • GUAN CHENGHUI
  • CHEN HAO
  • WU QINGYAN
  • LI SHICHUN
  • WANG CHIHONG
  • WANG YIFAN
  • CHEN PAN

Assignees

  • 浙江蔚福科技股份有限公司

Dates

Publication Date
20260512
Application Date
20260305

Claims (10)

  1. 1. The utility model provides an automatic cutting device of bellows, includes feeding mechanism (2) and cutting mechanism (4) that set gradually along the pay-off direction, its characterized in that, feeding mechanism (2) are carried out intermittent type to the bellows main part according to the fixed length through profile modeling direction conveying component, automatic cutting device of bellows still includes and is located between feeding mechanism (2) and cutting mechanism (4) and be used for with the radial fixed location fixture (3) of centre gripping of bellows main part, and location fixture (3) have the card go into thereby its ripple groove of bellows main part (11) makes the flexible axial location structure of at least partial axial section restriction of bellows main part (11), cutting mechanism (4) in the target ripple phase position execution cutting of bellows main part (11).
  2. 2. An automated cutting device for corrugated tubing according to claim 1, wherein the positioning and clamping mechanism (3) comprises a radial clamping jig having at least two clamping jaws circumferentially distributed and surrounding a corrugated tube clamping space inside the clamping jaws, and wherein the axial positioning structure comprises an axial positioning snap-in portion (33) provided on an inner side wall of the clamping jaws and being snap-in to the corrugated tube under the action of the radial clamping jig.
  3. 3. An automated cutting device for corrugated tubing according to claim 2, wherein the axially positioned snap-in portion (33) is contoured to the corrugation groove.
  4. 4. An automated bellows cutting device according to claim 2, wherein several of the clamping jaws are encircling to form a circular ring structure or to form a non-circular ring structure, and the axial positioning snap-in portions (33) form at least one complete circle of circular ring structure or the axial positioning snap-in portions (33) are evenly distributed in the circumferential direction.
  5. 5. An automated bellows cutting apparatus according to claim 1, wherein the feeding mechanism (2) comprises a conveying driving assembly and a profiling guide conveying assembly, a feeding rotation main shaft (214) of the conveying driving assembly is in transmission connection with a driving roller (231) of the profiling guide conveying assembly, and the driving roller (231) and at least one driven roller (232) cooperate to drive a synchronous conveying belt with a profiling clamping conveying channel to perform circulating operation.
  6. 6. The automatic corrugated pipe cutting device according to claim 5, wherein the synchronous conveyor belt comprises a first synchronous belt (222) and a second synchronous belt (233) which are arranged vertically opposite, a profiling clamping conveying channel for the corrugated pipe body (11) to pass through is arranged between the first synchronous belt (222) and the second synchronous belt (233), one of the first synchronous belt (222) and the second synchronous belt (233) is driven to operate by a feeding rotating main shaft (214), and the other one of the first synchronous belt and the second synchronous belt is driven to operate by a tensioning structure (25) in a matching mode through clamping friction force by adjusting a clamping gap of the profiling clamping conveying channel.
  7. 7. An automated bellows cutting device according to claim 1, wherein the cutting mechanism (4) comprises at least two cutting knives (43) which are fed or retracted relative to each other, the cutting knives (43) being in a circumferential rotational movement about the bellows axis and the own axis, respectively, and the cutting mechanism (4) being continuously rotated in a unidirectional direction or reciprocally rotated at a predetermined angle.
  8. 8. An automated cutting method for corrugated pipe, applied to an automated cutting apparatus for corrugated pipe according to any one of claims 1 to 7, comprising: S1, starting a feeding mechanism (2), wherein the feeding mechanism (2) is combined with a coarse fixed length mode and a fine positioning mode to intermittently convey a corrugated pipe main body (11) to a positioning clamping mechanism (3) according to fixed length, and enabling a cutting line of a cutting mechanism (4) to be aligned to a target corrugated phase position; S2, axially and radially synchronously profiling and fixing at least one side of the joint of the fixed-length section and the corrugated pipe main body (11) through the positioning and clamping mechanism (3); S3, cutting the joint through a cutting mechanism (4).
  9. 9. The automated bellows cutting method according to claim 8, wherein step S1 specifically comprises: s11, carrying out coarse fixed-length mode conveying, namely acquiring the rotation quantity of a feeding rotation main shaft (214) and effective circumference data of a driving roller (231) in a feeding mechanism (2), converting the rotation quantity into axial movement distance data of the corrugated pipe, and carrying out intermittent conveying on the corrugated pipe main body (11) according to preset length data based on the axial movement distance data; s12, carrying out fine positioning mode conveying, namely after finishing primary coarse fixed-length intermittent conveying in S11, acquiring a corrugated phase state of an adjacent area at the joint of the fixed-length section and the corrugated pipe main body (11), and controlling the feeding mechanism (2) to carry out micro compensation conveying based on the deviation between the corrugated phase state and the target corrugated phase position so as to align the cutting line of the cutting mechanism (4) to the target corrugated phase position; S13, repeating the steps S11-S12 until cutting of all the fixed-length sections is completed.
  10. 10. An automated cutting method for corrugated tubing according to claim 9, wherein the feeding speed of the feeding mechanism (2) is lower when it is fed in the fine positioning mode than when it is fed in the coarse positioning mode.

Description

Automatic corrugated pipe cutting device and method Technical Field The invention relates to the technical field of automatic cutting, in particular to an automatic cutting device and method for a corrugated pipe. Background The metal corrugated pipe is a typical thin-wall flexible pipe fitting, has a periodically undulating corrugated structure on the outer surface, and is widely applied to the fields of vacuum systems, new energy equipment and precise fluid transportation. In actual production, the metal bellows is usually fed in the form of a continuous tube or coil, and needs to be cut to length and then subjected to subsequent assembly or welding procedures. Because the metal corrugated pipe has small wall thickness and low rigidity, the traditional mechanical cutting or rigid clamping cutting mode easily introduces larger axial or radial stress in the feeding and cutting processes, so that elliptical deformation, uneven cutting end surfaces and even burrs and cracks are generated on the pipe, and the subsequent processing quality is influenced. The existing feeding mechanism still has the defects in the aspects of feeding stability and fixed length precision, the corrugated pipe is conveyed in a friction driving or simple clamping mode, and the axial and radial constraint capacity of the corrugated pipe in the feeding process is limited. When the feeding length is longer, the starting and stopping are frequent or the specification of the corrugated pipe is changed, the pipe is easy to slip, axially float or deviate, and accumulated errors are generated between the actual conveying length and the set length, so that the accuracy of the cutting position is affected. Secondly, in the aspect of cutting positioning and clamping modes, a rigid or semi-rigid outer clamping structure is generally adopted to clamp the corrugated pipe in the prior art. Because the outer surface of the metal corrugated pipe is of a corrugated structure with periodic fluctuation, and the wall thickness is smaller, the traditional plane or simple arc clamping surface is difficult to be fully attached to the shape of the corrugated pipe, and local stress concentration is easy to generate in the clamping process. Under the action of cutting load, the corrugated pipe is easy to generate local collapse, elliptic deformation or axial displacement, and the flatness and verticality of the cutting end face are affected. Disclosure of Invention In view of the above, the invention provides an automatic cutting device and method for corrugated pipes, which aims to solve the problems that the prior art still has defects in feeding stability and fixed length precision and local stress concentration is easy to occur in rigid or semi-rigid clamping. The invention provides an automatic corrugated pipe cutting device which comprises a feeding mechanism and a cutting mechanism, wherein the feeding mechanism and the cutting mechanism are sequentially arranged along a feeding direction, the feeding mechanism intermittently conveys a corrugated pipe main body according to a fixed length through a profiling guide conveying assembly, the automatic corrugated pipe cutting device further comprises a positioning clamping mechanism which is positioned between the feeding mechanism and the cutting mechanism and is used for radially clamping and fixing the corrugated pipe main body, the positioning clamping mechanism is provided with an axial positioning structure which is clamped into a corrugated groove of the corrugated pipe main body so that at least part of axial sections of the corrugated pipe main body are limited to stretch, and the cutting mechanism performs cutting at a target corrugated phase position of the corrugated pipe main body. Preferably, the positioning and clamping mechanism comprises a radial clamping fixture with at least two clamping jaws, the clamping jaws are circumferentially distributed, the inner parts of the clamping jaws surround a corrugated pipe clamping space, and the axial positioning structure comprises an axial positioning clamping part which is arranged on the inner side walls of the clamping jaws and can be clamped into the corrugated groove under the action of the radial clamping fixture. Preferably, the axial positioning clamping part and the corrugated groove are in profiling arrangement. Preferably, the clamping jaws surround to form a circular ring structure or form a non-circular ring structure, and the axial positioning clamping portions form at least one whole circle of circular ring structure or are uniformly distributed in the circumferential direction. Preferably, the feeding mechanism comprises a conveying driving assembly and a profiling guide conveying assembly, a feeding rotating main shaft of the conveying driving assembly is in transmission connection with a driving roller of the profiling guide conveying assembly, and the driving roller and at least one driven roller are matched to drive a synchronous c