CN101439414A - Machine for threading tube body - Google Patents

Abstract

A pipe-threading machine pertains to the technical field of mechanical processing, comprising a rear chuck, a main spindle box, a front chuck, a horizontal sliding plate, a vertical sliding plate, a tube expander, a pipe block, a knife tool, a motor and a bed piece; the main spindle box is arranged at the left upper part of the bed piece; the main spindle box is arranged on the combining surface, which inclines for 45 degrees at the left part of the bed piece; the rear left part of the bed piece is provided with a motor which drives the main shaft to rotate by a tooth-shaped belt and a gear; the two ends of the main shaft in the main spindle box are respectively provided with the front chuck and the rear chuck; the tube expander is arranged on the beam of the main spindle box; the bed piece is provided with a vertical sliding plate which moves vertically along a guide rail; the two guide rails on the vertical sliding plate are provided with two horizontal sliding plates and the two horizontal sliding plates are respectively provided with knife tools. The device of the pipe-threading machine is rationally designed; the main shaft and the chucks are split structures; the hilt system can synchronously process two knives or four knives; geometric accuracy of the machine tool is better due to a heavy-duty linear guide rail; and reliability of the hydraulic piece, the front chuck and the rear chuck is enhanced.

Description

Machine for threading tube body

Technical field:

The present invention relates to a kind of specialized nc machine tool that is specifically designed to by pipe and casing threads in the Machining Technology field, the button-type of machining screw comprises circle button, trapezoid buckle and special button-type partially.

Background technology:

At present, in the Machining Technology field, be specifically designed to the specialized nc machine tool that uses company's productions such as high-tensile strength is anti-by pipe and some producer of the specialized nc machine tool of casing threads, the structure of this lathe is the integral structure of main shaft and chuck, the structure more complicated, and difficulty is bigger in assembling and aspect safeguarding, the negligible amounts of cutter is used in processing simultaneously in addition, uses steel guideway to make geometric precision of machine tool relatively poor, inconvenient maintenance, in use also there are some problems in hydraulic part and forward and backward chuck.Border testing authentication factually has or not pre-centering claw qualification rate to differ 12-15%, especially to hot-rolled pipe.Therefore developing a kind of machine for threading tube body is the new problem of being badly in need of solution both at home and abroad.

Summary of the invention:

The purpose of this invention is to provide a kind of design science, main shaft and chuck be for dividing a body structure, in assembling and easy to maintenance, the hilt system can two cutter or four cutter is processed simultaneously, the heavy duty line slideway makes geometric precision of machine tool better, the machine for threading tube body that hydraulic part and forward and backward chuck reliability are strengthened.

The object of the present invention is achieved like this: machine for threading tube body, whole device is by the back chuck, main spindle box, preceding chuck, cross slide, longitudinal slide, tube expander, retaining pipe device, cutter, motor, lathe bed is formed, at the lathe bed upper left quarter main spindle box is installed, main spindle box is installed on the tilting 45 ° faying face of lathe bed left part, install by the flute profile band at lathe bed rear side left part, the motor that gear rotates main shaft, chuck and back chuck before install respectively at the two ends of main spindle box inner main axis, tube expander is installed on the crossbeam of main spindle box, the longitudinal slide that travels longitudinally along guide rail is installed on lathe bed, on longitudinal slide, on two guide rails two cross slides are installed, difference mounting cutter on two cross slides, the retaining pipe device that is used for the pipe axial direction positioning device is installed in main spindle box.

Main points of the present invention are its structure and operation principle.Its operation principle is this invention core technology, the one, the pre-centering function of lathe; According to the theory of " pipe end is not straight ", when being installed the processing steel pipe, to force the center line of pipe end is overlapped with main-shaft axis, the steel pipe of stopping to process casting skin occurs because of off-centre.The 2nd, interior tensioner function.Produce the interior centering technology of screw thread ripple development when avoiding processing tubule and light-wall pipe.This characteristic feature of an invention, the one, the integrated structure design of changing high-tensile strength main shaft of anti-product the and chuck has just been built the quick advantage easy to maintenance of assembling for dividing body structure; The 2nd, the optimum organization tooling system.According to the difference of processing object, the desirable selection process tool quantity and the choice of pipe-expander.The 3rd, changing steel guideway is heavily loaded line slideway.Main frame adopts the monoblock cast lathe bed, in reinforcement is arranged.Bed casting is placing concrete and reinforcing bar after anneal, Ageing Treatment, has guaranteed the rigidity of lathe, the up to standard and long perfomance life of inherent metallographic structure.Main frame is provided with the double-pole frame, uses the multitool moulding process, finishes the group fine finishining of pipe end one nose cone body, screw thread and inside and outside chamfered edge, planar end surface simultaneously.Adopt control system, main transmission to adopt high power DC electric machine, high-speed overload bearing, the main shaft cutting linear velocity can 180/ second, disposed in the water under high pressure cooling dashes and cuts.Like this, just can omnibearingly reach the effect of shortening process time, improving working (machining) efficiency, improve workpiece quality, reduce tool wear, reduce production costs.This machine adopted pipe is carried out the layout of three fulcrums chuckings, by be installed in nose end that the tube head that rises on the tube expander main shaft enters processed pipe promptly in the centering chucking, by be installed in head of a bed main shaft two ends before, latter two chuck is implemented wild card to processed pipe and is pressed.This lathe has disposed transmission accuracy and the stationarity that high-precision ball-screw improves feed system.The basic principle of pipe processing is " pipe end is not straight " basis as processing, so must force the part center line of pipe end is overlapped with main-shaft axis before processing, the pipe that processes does not so just have black skin buckle; Whole design (comprising the design of electrical design and subsidiary engine) is a notion of having considered whole production line, and is not only unit production, and this is maximum reason of enhancing productivity.Compare with domestic similar pipe machining tool, only feeding just needed for 25 seconds the same with the whole pitch time of processing small dimension pipe.Three stations are arranged on the subsidiary engine, as long as the client does, blanking rack is just passable, also has a lot of human oriented designs on the subsidiary engine: pipe has the feeding of water and lubricating fluid, tube bending, how the processing different size is adjusted and is waited us all to solve these problems well.Main shaft rated speed height, 800-900 rev/mins, adopt the high-speed overload bearing, cutting linear velocity can reach 150-180 meter per seconds,, the pipe roughness that processes like this is better.Also to have adopted the iron filings of water under high pressure (15KG, cutter water outlet, interior cooling) cutting be " white " in Machine Tool design in addition, is not " purple ".Promptly saved cutter, crudy is further improved.Lathe also has interior tensioner function (also can transfer interior centering to), and this is avoided vibrating and make the screw thread of processing produce ripple when cutting small dimension pipe or light-wall pipe.Four process cutter simultaneously during machine tooling, and working (machining) efficiency improves obviously, and the design of tool rest and cutter box is standard, and the replacing of moulding cutter is very efficient and convenient.Digital control system is a pure three-shaft linkage system, and the most high-grade ABB governing system is adopted in the main shaft speed governing, and electricity piece adopts the product of Schneider, disposes very high.After a tool setting is finished,, can process continuously, need not adjust cutter and benchmark at every turn as the specification that do not retube.Adopt efficient pipe machining tool, its input cost reduces, and the auxiliary equipment of production line and processing personnel reduce at double, and operating cost reduces, and also can make quick reply to market.

Machine for threading tube body compared with prior art, has the design science, main shaft and chuck are for dividing body structure, in assembling and easy to maintenance, the hilt system can two cutter or four cutter is processed simultaneously, the heavy duty line slideway makes geometric precision of machine tool better, and advantages such as hydraulic part and the reinforcement of forward and backward chuck reliability will be widely used in the Machining Technology field.

Description of drawings:

The present invention is described in detail below in conjunction with drawings and Examples.

Fig. 1 is a structural representation of the present invention.

Fig. 2 is the right view of Fig. 1.

The specific embodiment:

With reference to accompanying drawing, machine for threading tube body, whole device is by back chuck 1, main spindle box 2, preceding chuck 3, cross slide 4, longitudinal slide 5, tube expander 6, retaining pipe device 7, cutter 8, motor 9, lathe bed 10 is formed, at lathe bed 10 upper left quarters main spindle box 2 is installed, main spindle box 2 is installed on the tilting 45 ° faying face of lathe bed 10 left parts, install by the flute profile band at lathe bed 10 rear side left parts, the motor 9 that gear rotates main shaft, chuck 3 and back chuck 1 before install respectively at the two ends of main spindle box 2 inner main axis, tube expander 6 is installed on the crossbeam of main spindle box 2, the longitudinal slide 5 that travels longitudinally along guide rail is installed on lathe bed 10, on longitudinal slide 5, on two guide rails two cross slides 4 are installed, difference mounting cutter 8 on two cross slides 4, the retaining pipe device 7 that is used for the pipe axial direction positioning device is installed in main spindle box 2.

Claims (1)

1, a kind of machine for threading tube body, whole device is by the back chuck, main spindle box, preceding chuck, cross slide, longitudinal slide, tube expander, retaining pipe device, cutter, motor, lathe bed is formed, it is characterized in that: main spindle box is installed at the lathe bed upper left quarter, main spindle box is installed on the tilting 45 ° faying face of lathe bed left part, install by the flute profile band at lathe bed rear side left part, the motor that gear rotates main shaft, chuck and back chuck before install respectively at the two ends of main spindle box inner main axis, tube expander is installed on the crossbeam of main spindle box, the longitudinal slide that travels longitudinally along guide rail is installed on lathe bed, on longitudinal slide, on two guide rails two cross slides are installed, difference mounting cutter on two cross slides, the retaining pipe device that is used for the pipe axial direction positioning device is installed in main spindle box.

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