CN110116173B - Workpiece inner shrinkage processing lathe and processing method thereof - Google Patents
Workpiece inner shrinkage processing lathe and processing method thereof Download PDFInfo
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- CN110116173B CN110116173B CN201910459178.5A CN201910459178A CN110116173B CN 110116173 B CN110116173 B CN 110116173B CN 201910459178 A CN201910459178 A CN 201910459178A CN 110116173 B CN110116173 B CN 110116173B
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- 238000003672 processing method Methods 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 22
- 230000000694 effects Effects 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims description 31
- 230000006698 induction Effects 0.000 claims description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 239000000110 cooling liquid Substances 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 238000007514 turning Methods 0.000 claims description 3
- 238000007790 scraping Methods 0.000 claims description 2
- 230000008719 thickening Effects 0.000 abstract description 15
- 230000008569 process Effects 0.000 abstract description 7
- 238000001125 extrusion Methods 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 238000007493 shaping process Methods 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000009987 spinning Methods 0.000 description 3
- 230000020169 heat generation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 241000220317 Rosa Species 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
- B21D19/10—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws working inwardly
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D41/00—Application of procedures in order to alter the diameter of tube ends
- B21D41/04—Reducing; Closing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/04—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass for both machining and other metal-working operations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Forging (AREA)
Abstract
The invention provides a workpiece inner necking processing lathe and a processing method thereof. The through hole cutters with different shapes are adopted in the process of processing the through hole on the workpiece, so that the uniformity of thickening of the inner flanging of the inner shrinkage opening and the extrusion force can be effectively improved, the structural strength of the inner shrinkage opening can be conveniently improved, meanwhile, the inner notch can be conveniently formed, the effect of extending towards the inside of the workpiece can be conveniently improved, the connection strength and the sealing effect of the external workpiece can be conveniently improved, meanwhile, the friction effect caused by different contact surfaces between the through hole cutters and the workpiece can be conveniently realized, the workpiece can be conveniently heated, the energy consumption can be saved, and the adjustment of the uniformity of thickening of the inner shrinkage opening can be conveniently realized.
Description
Technical Field
The invention relates to the technical field of necking processing, in particular to a workpiece inner necking processing lathe and a processing method thereof.
Background
The necking workpieces are widely applied in life, along with the progress and development of science and technology, the application of various technologies and the requirements on the technology are higher and higher, the necking workpieces are more and more applied to a fracturing device, the necking forming method of the common pressure vessel sealing head is spinning, the spinning forming is easy to cause low roundness (namely oval) of necking, and difficulties are brought to the assembly of the pressure vessel in the later period.
For example, in chinese patent CN01126577.9, an extrusion shaping method is adopted to perform necking, which is suitable for pipes with a large elastic modulus and a relatively soft material, and is also suitable for necking processing with a low requirement on the tensile strength of the necking end, and for pipes with a relatively hard material, the extrusion shaping position has a weak point with a small tensile strength of a whole circle, so that pipes bearing a pressure vessel of 20-150MPa cannot be processed, the uniformity of the shaped necking end is poor, and the necking end is thickened axially outwards.
Chinese patent CN200710185660.1 is a method for manufacturing a pressure vessel by necking, which is commonly used at present, and after the pressure vessel is formed by double-end spinning necking, quenching, tempering and heat preservation are performed, the processing time is long, and the necking end is thickened axially outwards. The necking method of the Chinese patent CN201210389715.1 is to continuously perform radial impact on the guide pipe through two separated female die shrinking blocks, wherein the two half female die shrinking blocks enable the guide pipe to generate plastic deformation through each impact, the guide pipe is continuously fed into the die, and the two half female die shrinking blocks continuously impact the guide pipe until the whole necking process is completed; the requirements on the technical level of workers are high, the necking process is mastered by experience, the consistency of the produced pressure container is poor, and the necking end is thickened outwards in the axial direction.
The application number 201710359644.3 discloses a necking method, a necking die used by the necking method and application of the necking die. The pipe is manufactured into the pressure vessel by a necking processing method. The necking die is characterized in that a transverse portion, an arc portion, a supporting portion and a longitudinal portion are arranged on a base body, the arc portion is arranged between the transverse portion and the longitudinal portion, and the transverse portion is arranged between the supporting portion and the arc portion. The method has the advantages that the processing method is simple and quick, the necking ends with different shapes can be processed, the consistency of the necking ends is good, the necking ends are thickened outwards in the axial direction or thickened inwards in the axial direction, and the processing method and the necking die can be industrially applied.
However, in the processing process of the pipe or the workpiece, the thickness of the formed inward flanging with the necking structure is uneven, and the inward notch extends too short, so that the connection strength and the sealing effect between the inward flanging with the external connecting piece are affected.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a workpiece inner necking processing lathe and a processing method thereof, wherein the workpiece inner flanging is convenient to uniformly thicken, the inner necking connected with an external connecting piece is enhanced, and the workpiece inner necking processing lathe is convenient to seal.
The technical scheme of the invention is as follows: a method for processing an inner shrinkage opening of a workpiece includes the steps that a through hole cutter is adopted to carry out through hole on the workpiece subjected to heating shrinkage opening processing molding, the workpiece rotates relative to the through hole cutter, meanwhile, the workpiece is heated, and the through hole cutter is in a conical arc shape.
Further, the cone shape is an inclined plane, the cone shape of the through hole knife is an inclined plane, and the inclined plane can be arranged on a plurality of surfaces.
Further, the cone shape is parabolic, and the cone shape of the through hole knife is parabolic, so that the through hole knife is convenient to feed the workpiece.
Further, the cone shape is an asymptote, and the cone shape of the through hole cutter is an asymptote, so that the notch in the workpiece can extend into the workpiece conveniently.
Further, the workpiece is mounted on the lathe and rotates, and in use, the workpiece is mounted on a clamp on the lathe, the clamp drives the workpiece to rotate, and the through hole cutter is stationary relative to the workpiece.
Further, the through hole knife is arranged on the lathe and rotates, when the through hole knife is used, the through hole knife rotates, meanwhile, the workpiece can also reversely rotate relative to the through hole knife, and the two can relatively rotate, so that the processing efficiency is improved.
Further, the workpiece is heated, the rotation linear speed is greater than 2m/s, friction heat generation is increased, heating and heating temperature adjustment of the workpiece are facilitated, energy is saved, and after the processing of the workpiece through hole is completed, screw tap shaping is performed on the workpiece.
The lathe comprises a clamp, a workbench and a heating device, wherein the clamp is arranged at one end of the workbench, an inner necking die is arranged at the other end of the workbench, the heating device is arranged at one side of the workbench, the conical through hole knife is arranged on the inner necking die, and a reinforcing part is arranged between the through hole knife and the inner necking die.
Further, the internal shrinkage die comprises a die body, a through hole part and a shrinkage part for extruding the internal flanging, wherein the rear end of the die body is provided with a mounting part, the front end of the die body is provided with a shrinkage part, the through hole part is arranged on the side face of the shrinkage part, a through hole cutter is arranged in the through hole part, one side of the through hole cutter is provided with a mounting hole, the mounting hole is used for mounting a screw tap and a dental lamina, and the right end of the internal shrinkage die is provided with a fastening bolt.
Further, the necking part comprises a transverse part, a longitudinal part and an arc part, wherein the longitudinal part is positioned on the upper end face of the transverse part, the arc part is positioned between the longitudinal part and the transverse part, a step is arranged in the arc part and comprises a left end face, a right end face and an arc blade, the arc blade is positioned between the left end face and the right end face, and a groove is formed between every two adjacent steps.
Further, heating device includes high frequency induction heater and drive arrangement, and drive arrangement locates on the lathe through the backup pad, and high frequency induction heater is connected with drive arrangement, high frequency induction heater is connected with hollow pipe one end, and the hollow pipe other end is equipped with the circle, and the internal diameter of circle is greater than the external diameter of work piece, and hollow pipe is U type structure and is made by copper, leads to circulating cooling fluid in the hollow pipe.
The invention has the following characteristics:
1. the through hole cutters with different shapes are adopted in the process of processing the through hole on the workpiece, so that the uniformity of thickening of the inner flanging of the inner shrinkage opening and the extrusion force can be effectively improved, the structural strength of the inner shrinkage opening can be conveniently improved, meanwhile, the inner notch can be conveniently formed, the effect of extending towards the inside of the workpiece can be conveniently improved, the connection strength and the sealing effect of the external workpiece can be conveniently improved, meanwhile, the friction effect caused by different contact surfaces between the through hole cutters and the workpiece can be conveniently realized, the workpiece can be conveniently heated, the energy consumption can be saved, and the adjustment of the uniformity of thickening of the inner shrinkage opening can be conveniently realized.
2. The through hole knife adopts different rotation modes relative to the workpiece, friction heat is generated between the workpiece and the through hole knife, the formation and uniform thickening of the shrinkage cavity in the workpiece are facilitated, and the repeated through holes in the through hole process are convenient for the formation and shaping of the notch in the workpiece.
3. The setting of ladder on the neck-in mould, the interplay of left end face and right-hand member face scrapes crowded and plastic to the work piece tip, effectually has realized when processing the work piece tip, simultaneously to the effect of tip plastic, is convenient for improve the efficiency of internal flanging simultaneously, the improvement of machining efficiency of being convenient for.
4. The efficiency that the temperature of work piece rose has effectually been improved in the setting of high frequency induction heating, but hollow circle tube ring multiturn sets up simultaneously, is convenient for improve the improvement of the heating range and the heating rate of work piece, can effective control heating temperature, the processing effect and the efficiency of the throat in the work piece of being convenient for.
5. Be equipped with the recirculated cooling liquid in the hollow pipe, when heating up the work piece, can effectually reduce the influence of high temperature to high frequency induction heater, be convenient for improve the life of heater, inform hollow pipe to adopt copper, the thermal conduction between hollow pipe and the coolant liquid of being convenient for, the cooling effect of being convenient for and the protection to hollow pipe prevent to take place to warp or melt because of the high temperature.
The detailed structure of the present invention is further described below with reference to the accompanying drawings and detailed description.
Drawings
FIG. 1 is a schematic diagram of a machine tool according to the present invention;
FIG. 2-is an enlarged schematic view of the high frequency induction heater of FIG. 1;
FIG. 3-is a schematic view of the structure of the internal shrinkage die;
FIG. 4-is an enlarged schematic view of the arc portion of FIG. 3;
FIG. 5 is a schematic comparison of four different configurations of a via cutter;
1-high frequency induction heater, 2-mount pad, 3-drive arrangement, 4-hollow pipe, 5-circle, 6-jump bit, 7-fixing base, 8-X axle, 9-Y axle, 10-workstation, 11-work piece, 12-anchor clamps, 13-backup pad, 14-mould body, 15-vertical portion, 16-circular arc portion, 17-horizontal portion, 18-through-hole sword, 19-fastening bolt, 20-mounting hole, 21-reinforcing portion, 22-mount portion, 23-left end face, 24-right end face, 25-circular arc sword, 26-recess.
Detailed Description
As shown in fig. 1-5, a lathe for processing an inner shrink mouth of a workpiece 11, the lathe comprises a clamp 12, a workbench 10 and a heating device, wherein the clamp 12 is arranged at one end of the workbench 10, an inner shrink mouth die is arranged at the other end of the workbench 10, the heating device is arranged at one side of the workbench 10, a conical through hole cutter 18 is arranged on the inner shrink mouth die, and a reinforcing part 21 is arranged between the through hole cutter 18 and the inner shrink mouth die.
The inner necking die comprises a die body 14, a through hole part and a necking part for extruding an inner flanging, wherein the rear end of the die body 14 is provided with a mounting part 22, the front end of the die body 14 is provided with a necking part, the through hole part is arranged on the side surface of the necking part, a through hole cutter 18 is arranged in the through hole part, the front end of the through hole cutter 18 is conical, the conical arrangement is convenient for forming a through hole on a workpiece 11 and a notch in the necking part, the through hole cutter 18 is positioned on the right side of the die body 14, a reinforcing part 21 is arranged between the through hole cutter 18 and the die body 14, one side of the through hole cutter 18 is provided with a mounting hole 20 for mounting a screw tap and a dental plate, the right end of the inner necking die is provided with a fastening bolt 19, and the fastening bolt 19 is used for fixing the screw tap or the dental plate; when the work 11 is to be subjected to the through-hole, the reinforcing portion 21 can exert a further pressing effect on the end portion of the work 11, facilitate the formation of the inner recess at the time of the through-hole, and simultaneously facilitate the improvement of the connection strength of the through-hole cutter 18 and the die body 14.
The necking part comprises a transverse part 17, a longitudinal part 15 and an arc part 16, wherein the longitudinal part 15 is positioned on the upper end surface of the transverse part 17, the arc part 16 is positioned between the longitudinal part 15 and the transverse part 17, and a step is arranged in the arc part 16.
The steps comprise a left end face 23, a right end face 24 and an arc edge 25, the arc edge 25 is positioned between the left end face 23 and the right end face 24, a groove 26 is formed between two adjacent steps, the depth of the groove 26 is 0.5-10mm, the transverse distance between two adjacent steps is 0.05-0.5 times of the thickness of the workpiece 11, preferably, the depth of the groove 26 is 0.5-10mm, the transverse distance between two adjacent steps is 0.05-0.5 times of the thickness of the workpiece 11, the plastic deformation of the heated processing end of the workpiece 11 is facilitated to realize inward flanging, the effect and the efficiency of the inward flanging are improved, and the thickening uniformity of the processing end of the workpiece 11 is facilitated; preferably, the slope of the left end surface 23 is smaller than that of the right end surface 24, so that the drop height of the workpiece 11 reaching the right end surface 24 through the arc edge 25 is larger, and the formation of the inward flange is facilitated.
When the end of the workpiece 11 is positioned on the left end face 23 of the ladder, the workpiece 11 automatically extrudes the end of the workpiece 11, the end of the workpiece 11 which can be plastically deformed after heating is driven to be turned into the workpiece 11, and meanwhile, the outer surface of the end of the workpiece 11 can be shaped, when the end of the workpiece 11 passes through the arc edge 25, the arc edge 25 plays a role in extruding and scraping the end of the workpiece 11 to further improve the inward turning, and when the workpiece 11 moves from the arc edge 25 to the right end face 24, the end of the workpiece 11 is further turned inwards due to the distance difference between the arc edge 25 and the right end face 24, the effect of thickening the inward turning is effectively improved, and meanwhile, the end of the workpiece 11 can be shaped.
The angle of the arc part 16 is r, the r angle is 1-100 degrees, and the r angle is gradually increased from left to right; preferably, the r angle is between 5 and 30 degrees; when the workpiece 11 moves rightward relative to the necking die, the transition from point contact, which is the contact point between the outer chord of the end wall of the workpiece 11 and the transverse portion 17 and the longitudinal portion 15, to surface contact, which is the surface contact between the arc of the end of the workpiece 11 and the arc portion 16, the transverse portion 17 and the longitudinal portion 15, is gradually made to face contact, so that inward flanging and extrusion thickening of the end of the workpiece 11 are facilitated.
The longitudinal portion 15 is perpendicular to the transverse portion 17, the front end face of the longitudinal portion 15 forms an angle R with the transverse central axis of the die body 14, the angle R is 1-89 degrees, R is preferably 4-10 degrees, the distance between the right end of the longitudinal portion 15 and the die body 14 is L, L is used for determining the inner flanging thickness of the workpiece 11, the L distance is the distance that the end of the pipe is extruded and shortened, and the shortened part is used for thickening the end of the pipe, so that the structural strength of the end of the pipe is improved; when the workpiece 11 contacts with the initial position of the left end of the inner necking die, the workpiece 11 can also move in the axial direction of the workpiece, the moving distance S and the distance L between the longitudinal part 15 of the inner necking die and the die body 14 are the parts of the end part of the workpiece 11, and the shortened parts are used for observing the thickening of the end part.
The heating device comprises a high-frequency induction heater 1 and a driving device 3, wherein the driving device 3 is arranged on a lathe through a supporting plate 13, the high-frequency induction heater 1 is connected with the driving device 3, the driving device 3 is an air cylinder or a hydraulic cylinder, the high-frequency induction heater 1 is movably connected with the lathe through a mounting seat 2, the high-frequency induction heater 1 is connected with one end of a hollow circular tube 4, the other end of the hollow circular tube 4 is provided with a ring 5, the inner diameter of the ring 5 is larger than the outer diameter of a workpiece 11, the driving device 3 is used for driving the high-frequency induction heater 1 to move, so that the ring 5 is conveniently sleeved into the processing end of the workpiece 11, and the heating end of the workpiece 11 is conveniently heated and the heating efficiency is improved; the high-frequency induction heater 1 is provided with the efficiency of the temperature rise of the workpiece 11 effectively, meanwhile, the hollow round tube 4 rings 5 can be arranged in a plurality of rings 5, so that the heating range and the heating rate of the workpiece 11 are improved conveniently, the heating temperature can be controlled effectively, and the processing effect and the processing efficiency of the necking in the workpiece 11 are facilitated.
The hollow circular tube 4 is U-shaped structure and is made by copper, and the hollow tube is internally provided with circulating cooling liquid, and the cooling liquid is tap water, so that when the workpiece 11 is heated, the influence of high temperature on the high-frequency induction heater 1 can be effectively reduced, the service life of the heater is conveniently prolonged, the hollow circular tube 4 adopts copper, the heat conduction between the hollow circular tube 4 and the cooling liquid is convenient, the cooling effect is convenient, the protection of the hollow circular tube 4 is realized, and the deformation or melting caused by overhigh temperature is prevented.
The lathe is further provided with an impact hammer 6, an X axis 8, a Y axis 9 and a fixed seat 7, the impact hammer 6 is installed on the workbench 10 through a fixing frame, the impact hammer 6 can forge the workpiece 11 according to requirements, the structural strength of the workpiece 11 can be conveniently improved, the X axis 8 and the Y axis 9 are mutually perpendicular and can be linked through two shafts, the fixed seat 7 is arranged above the two shafts, the fixed seat 7 is used for installing a die, and meanwhile, the left end of the lathe is provided with a numerical control screen for controlling the operation of the whole lathe and the setting of parameters, and the operation is convenient and the processing efficiency is improved.
The method for processing the inner shrinkage opening of the workpiece 11 is adopted, the workpiece 11 subjected to the heating shrinkage opening processing and molding is subjected to through hole processing by adopting a through hole cutter 18, the workpiece 11 rotates relative to the through hole cutter 18, and simultaneously the workpiece 11 is heated, and the through hole cutter 18 is in a conical arc shape.
The cone shape is an inclined plane, and the through hole knife 18 is an inclined plane on the cone shape, so that the thickening uniformity of the inner shrinkage opening is improved, and meanwhile, the inclined plane can be arranged on a plurality of surfaces.
The cone shape is parabolic, and the cone shape of the through hole cutter 18 is parabolic, so that the through hole cutter feeding of the workpiece 11 is facilitated, the processing efficiency is improved, the extrusion force to the inner shrinkage opening is enhanced, and the structural strength of the workpiece 11 is improved.
The taper shape of the through hole cutter 18 is an asymptote, so that the inner notch is convenient to extend into the workpiece 11, and the connection strength and sealing effect of the external connecting piece and the workpiece 11 are convenient to improve.
The through hole cutter 18 can be set into other structural shapes to adjust the extending length of the notch in the workpiece 11 to the inside of the workpiece 11 and the thickening uniformity of the shrinkage opening in the workpiece 11, so that the connection strength and the structural strength between the workpiece 11 and an external connecting piece are improved, and the connection sealing effect is improved.
The workpiece 11 is mounted on a lathe and rotates, and in use the workpiece 11 is mounted on a clamp 12 on the lathe, the clamp 12 drives the workpiece 11 to rotate, and the hole cutter 18 is stationary relative to the workpiece 11.
The through hole cutter 18 is arranged on the lathe and rotates, when in use, the through hole cutter 18 rotates, meanwhile, the workpiece 11 can also reversely rotate relative to the through hole cutter 18, and the relative rotation of the through hole cutter 18 and the workpiece is convenient for improving the processing efficiency.
The through hole cutter 18 and the workpiece 11 rotate relatively in various ways, friction heat is generated in the rotation process to heat the workpiece 11, the temperature of the workpiece 11 in the machining process is kept constant, and the effect of carrying out through hole on the workpiece 11 and the uniformity of thickening of the inner shrinkage opening are facilitated.
The workpiece 11 is heated, the rotation linear speed is greater than 2m/s, friction heat generation is increased, heating and heating temperature adjustment of the workpiece 11 are facilitated, energy is saved, and after the processing of the through hole of the workpiece 11 is completed, the workpiece 11 is shaped by tapping.
When the workpiece 11 subjected to heating necking processing and forming is subjected to through hole forming, the through hole cutter 18 is made to advance towards the axis direction of the workpiece 11 in the Y-axis 9 direction, the through hole cutter 18 is fully fed, meanwhile, the workpiece 11 is driven by the rotation of the clamp 12 to do rotary motion, the rotary linear speed is greater than 2m/s, repeated feeding is carried out for many times, the end part of the workpiece 11 is extruded by the through hole cutter 18, so that the end part material extends into the workpiece 11 to form an inner notch, the inner notch is convenient to form by many times of feeding, the inner notch is convenient to shape, preferably, the inner notch is always positioned on the central line axis of the workpiece 11, the connection of an external connecting piece is convenient, the thickening uniformity of the processing end of the workpiece 11 is also convenient, the bearing strength of the inner notch is uniform, and the service life of the workpiece 11 is convenient to improve.
And withdrawing the workpiece 11 with the inner notch from the through hole cutter 18, tapping to form internal threads or external threads, or further cutting the machining part, and cooling and shaping the workpiece 11 after machining.
The work 11 is a pressure vessel including a sinus gas tank, a gas pipe, a hydraulic tank, a storage tank, a pressure bottle, and a fire extinguisher, or a pipe including a steel pipe, an alloy pipe, an expansion pipe, and a copper pipe.
When the steel pipe is processed, one end of the steel pipe is fixed through a clamp 12, a ring 5 on a high-frequency induction heater 1 is sleeved on the processing end of the steel pipe, the steel pipe is rotated at the linear speed of 2.2 m/s, the linear speed is increased to 2.6m/s when the temperature of the processing end of the steel pipe reaches 800-1000 ℃, the processing end is moved to the left end starting position of an inward necking die relatively, the steel pipe is moved to the tail part of the steel pipe relatively to the inward necking die, the inner flanging thickening is realized on the end of the steel pipe, the shaping is realized, after the processing is finished, a through hole is formed on the end of the processing end by adopting a through hole cutter 18 on the inward necking die, the through hole is repeatedly formed for a plurality of times, the heating is stopped, then the internal thread processing is carried out on the steel pipe through a screw tap, or the internal thread processing is carried out on the steel pipe through the screw tap, and then the internal notch is cooled for shaping.
The preferred embodiments of the present invention have been described in detail above, but it is apparent that the present invention is not limited to the above-described embodiments. Within the scope of the technical idea of the invention, various equivalent modifications can be made to the technical solution of the invention, which all belong to the protection scope of the invention. In addition, the technical features described in the above-described specific embodiments may be combined separately and independently as long as they are within the technical concept of the present invention.
Claims (9)
1. The utility model provides a shrink mouth processing lathe in, the lathe includes anchor clamps, workstation and heating device, and the one end of workstation is located to the anchor clamps, and the other end is equipped with shrink mouth mould in, and one side of workstation is located to heating device, its characterized in that: a conical through hole cutter is arranged on the inner necking die, and a reinforcing part is arranged between the through hole cutter and the inner necking die;
the inner necking die comprises a die body, a through hole part and a necking part for extruding an inner flanging, wherein the rear end of the die body is provided with a mounting part, the front end of the die body is provided with a necking part, the through hole part is arranged on the side surface of the necking part, a through hole cutter is arranged in the through hole part, one side of the through hole cutter is provided with a mounting hole, the mounting hole is used for mounting a screw tap and a dental lamina, and the right end of the inner necking die is provided with a fastening bolt; the necking part comprises a transverse part, a longitudinal part and an arc part, wherein the longitudinal part is positioned on the upper end face of the transverse part, the arc part is positioned between the longitudinal part and the transverse part, a step is arranged in the arc part and comprises a left end face, a right end face and an arc blade, the arc blade is positioned between the left end face and the right end face, and a groove is formed between every two adjacent steps; the heating device comprises a high-frequency induction heater and a driving device;
when the end part of the workpiece is positioned on the left end face of the ladder, the workpiece autorotation extrudes the end part of the workpiece, the end part of the workpiece which can be plastically deformed after heating is driven to turn up the edge of the workpiece, meanwhile, the outer surface of the end part of the workpiece is shaped, when the end part of the workpiece passes through the arc edge, the arc edge plays a role in further improving the inward turning effect of extruding and scraping the edge of the end part of the workpiece, and when the workpiece moves from the arc edge to the right end face, the end part of the workpiece is further turned up inwards due to the distance difference between the arc edge and the right end face.
2. The necking machine tool of claim 1 wherein: the driving device is arranged on the lathe through the supporting plate, the high-frequency induction heater is connected with the driving device, the high-frequency induction heater is connected with one end of the hollow round tube, the other end of the hollow round tube is provided with a ring, the inner diameter of the ring is larger than the outer diameter of the workpiece, the hollow round tube is of a U-shaped structure and is made of copper, and circulating cooling liquid is circulated in the hollow tube.
3. An internal necking processing method for a workpiece by adopting the internal necking processing lathe of claim 1 or 2, which is characterized in that a through hole knife is adopted for the workpiece after the heating necking processing forming to carry out through hole, the workpiece rotates relative to the through hole knife, and simultaneously, the workpiece is heated, and the internal necking processing method is characterized in that: the through hole knife is in a conical arc shape.
4. A method of necking in a workpiece according to claim 3 wherein: the cone shape is an inclined plane.
5. A method of necking in a workpiece according to claim 3 wherein: the cone shape is parabolic.
6. A method of necking in a workpiece according to claim 3 wherein: the cone shape is an asymptote.
7. A method of necking in a workpiece according to claim 3 wherein: the workpiece is mounted on a lathe and rotated.
8. A method of necking in a workpiece according to claim 3 wherein: the through hole knife is arranged on the lathe and rotates.
9. The method for processing the inner shrink mouth of the workpiece according to claim 7 or 8, wherein: and heating the workpiece, wherein the rotation linear speed is more than 2m/s.
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| CN110523867A (en) * | 2019-08-31 | 2019-12-03 | 远军热能动力科技有限公司 | A kind of outer tang processing method of metal tube |
| CN111167956A (en) * | 2020-01-17 | 2020-05-19 | 南昌航空大学 | Method and device for realizing forming of necking and thickening of tube blank |
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