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CN113579134B - Pipe fitting processing equipment - Google Patents

Pipe fitting processing equipment Download PDF

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Publication number
CN113579134B
CN113579134B CN202110726244.8A CN202110726244A CN113579134B CN 113579134 B CN113579134 B CN 113579134B CN 202110726244 A CN202110726244 A CN 202110726244A CN 113579134 B CN113579134 B CN 113579134B
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CN
China
Prior art keywords
die
pipe
end part
pipe fitting
cylinder
Prior art date
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Active
Application number
CN202110726244.8A
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Chinese (zh)
Other versions
CN113579134A (en
Inventor
张友刚
黄柯
苏天哲
廖凯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zoomlion Heavy Industry Science and Technology Co Ltd
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Zoomlion Heavy Industry Science and Technology Co Ltd
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Application filed by Zoomlion Heavy Industry Science and Technology Co Ltd filed Critical Zoomlion Heavy Industry Science and Technology Co Ltd
Priority to CN202110726244.8A priority Critical patent/CN113579134B/en
Publication of CN113579134A publication Critical patent/CN113579134A/en
Application granted granted Critical
Publication of CN113579134B publication Critical patent/CN113579134B/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/002—Hybrid process, e.g. forging following casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
    • B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
    • B21C3/02—Dies; Selection of material therefor; Cleaning thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C9/00—Cooling, heating or lubricating drawing material
    • 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
    • B21D41/02—Enlarging
    • B21D41/026—Enlarging by means of mandrels
    • 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/003—Positioning devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/02—Dies or mountings therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/08—Accessories for handling work or tools
    • B21J13/085—Accessories for handling work or tools handling of tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/08—Accessories for handling work or tools
    • B21J13/10—Manipulators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/10—Drives for forging presses
    • B21J9/12—Drives for forging presses operated by hydraulic or liquid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K29/00—Arrangements for heating or cooling during processing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

The invention relates to the field of pipe fitting machining, and discloses pipe fitting machining equipment which comprises an end part shaping die (1) positioned at a first station and an end part fine rule die positioned at a second station. Through the technical scheme, the end part of the pipe fitting is only processed through the end part shaping die and the end part fine rule die, so that the pipe fitting with the accurate size of the end part is manufactured, the connection requirement of other pipe fittings or joints is met, the fine rule processing of the part outside the end part is not needed, the processing procedures and the processing cost are reduced, the processing efficiency is improved, and the tracing back after the mark is formed on the pipe fitting is convenient.

Description

Pipe fitting processing equipment
Technical Field
The invention relates to the field of pipe fitting machining, in particular to pipe fitting machining equipment.
Background
At present, the fine-drawn seamless steel tube in the market is applied to a hydraulic fluid connection process and has the following four forms: the metal sealing ferrule nut, the elastic sealing pipeline forming and the 37-degree flaring can only be matched with the finish drawing seamless steel pipe, and the price of the finish drawing seamless steel pipe is exponentially higher than that of the seamless steel pipe.
At present, a seamless tube blank is subjected to cold drawing for multiple times, and finally, a high-precision die is used for finish drawing to obtain a finish-drawn seamless tube. With the development of industry, the influence of material cost on product price is larger and larger, and the current process cannot meet the cost requirement in the industry.
Disclosure of Invention
The invention aims to provide pipe fitting machining equipment to solve the problem that machining cost of a precisely drawn seamless steel pipe is high.
In order to achieve the above object, the present invention provides a pipe processing apparatus, wherein the pipe processing apparatus includes an end shaping die located at a first station and an end finishing rule die located at a second station, and the pipe processing apparatus is capable of primarily shaping an end of a pipe by the end shaping die and finishing a finish rule on an end of the pipe by the end finishing rule die to manufacture an end finishing rule pipe.
Optionally, the pipe machining apparatus comprises clamps arranged at the first station and the second station for clamping the pipe, the pipe machining apparatus can replace different types of the clamps for different batches of pipes, and the clamping surfaces of the different types of the clamps are provided with different marking textures.
Optionally, the pipe fitting machining equipment comprises a clamp oil cylinder for driving the clamp to open and close.
Alternatively, the pipe can be inserted into the end shaping die and the end finishing die, respectively, in a first direction, and the end shaping die and the end finishing die are aligned in a second direction perpendicular to the first direction.
Optionally, the pipe fitting processing equipment comprises a support frame for respectively supporting the end shaping die and the end finishing rule die, and a die oil cylinder capable of driving the support frame to deform so as to respectively drive the end shaping die and the end finishing rule die to open and close.
Optionally, the end shaping die comprises a die expanding mandrel, and the pipe machining equipment comprises a shaping oil cylinder for driving the die expanding mandrel to move along the first direction.
Optionally, the pipe machining apparatus includes a feed cylinder for driving a pipe to move from the first station to the second station.
Optionally, the end finish rule die is an end finish heading die.
Optionally, the pipe machining apparatus includes a finish heading cylinder for driving the end finish heading die to move in the first direction.
Optionally, the end fine rule die is an end fine drawing die.
Optionally, the pipe machining apparatus includes a finish draw cylinder for driving the pipe in the first direction toward and away from the end finish draw die.
Through the technical scheme, the end part of the pipe fitting is only processed through the end part shaping die and the end part fine rule die, so that the pipe fitting with the accurate size of the end part is manufactured, the connection requirement of other pipe fittings or joints is met, the fine rule processing of the part outside the end part is not needed, the processing procedures and the processing cost are reduced, the processing efficiency is improved, and the tracing back after the mark is formed on the pipe fitting is convenient.
Drawings
Fig. 1 is a schematic structural view of a pipe machining apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a hydraulic circuit according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of an end shaping die according to an embodiment of the present invention;
fig. 4 is a schematic structural view of an end fine upsetting die according to an embodiment of the invention;
fig. 5 is a schematic structural view of a pipe machining apparatus according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a hydraulic circuit according to an embodiment of the present invention;
fig. 7 is a schematic structural view of an end portion finish drawing die according to an embodiment of the present invention.
Description of the reference numerals
1-an end part shaping die, 2-a clamp, 3-a support frame, 4-a die oil cylinder, 5-a clamp oil cylinder, 6-a feeding oil cylinder, 7-a shaping oil cylinder, 8-an end part fine drawing die, 9-a fine drawing oil cylinder, 10-an end part fine drawing die, 11-a fine drawing oil cylinder, 12-a fine drawing mandrel, 13-a die expanding mandrel, 14-an electromagnetic induction coil heating device, 30-a pipe fitting, 61-an oil tank, 62-an oil pump, 63-a motor, 64-an overflow valve, 65-a first reversing valve, 66-a second reversing valve, 67-a sequence valve and 68-a hydraulic lock.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are given by way of illustration and explanation only, not limitation.
The noun interpretation:
blanking: cutting the pipe fitting to obtain the pipe fitting with the length required by the product
Shaping: the end of the pipe fitting is machined, so that the inner diameter of the pipe fitting is increased, the process of machining the pipe fitting to a specific size is achieved, and the problem that a subsequent fine ruler cannot be machined in place when the inner diameter of the pipe is in a lower difference is avoided.
Fine sizing: the process of machining the pipe diameter to within the required size range.
The invention provides pipe fitting processing equipment, which comprises an end part shaping die 1 positioned at a first station and an end part fine rule die positioned at a second station, wherein the pipe fitting processing equipment can firstly carry out primary end part shaping on a pipe fitting through the end part shaping die 1 and then carry out fine rule on the end part of the pipe fitting through the end part fine rule die so as to manufacture an end part fine rule pipe fitting.
The pipe machining apparatus can perform end machining on a pipe, particularly for metal pipes such as steel pipes, and can perform drawing (e.g., cold drawing) on the pipe multiple times and blanking at the end before machining the pipe by using the pipe machining apparatus.
The existing application of the finish-drawn seamless steel pipe in carrying hydraulic fluid has high requirements on the size of the end of a raw material, but has no requirements on the size of the middle of a pipeline, and the finish-drawn seamless steel pipe is used in the whole process, so that the material waste is large and the processing time is long; the price of the fine-drawn seamless steel tube is exponentially higher than that of the seamless steel tube, and the product cost is high.
The pipe fitting machining equipment comprises an end part shaping die 1 and an end part fine rule die, wherein the end part shaping die 1 can be used for preliminarily shaping the end part of the pipe fitting, so that the end part of the pipe fitting is preliminarily formed into a target shape (for example, shaped into a standard circle) and is closer to a target size; then, do the finish rule processing (accurate size processing promptly) through the tip finish rule mould to the tip of the pipe fitting of preliminary plastic for the size of tip is more accurate and accords with the target size, adopts the mode of finish rule promptly to process the tip of pipe fitting for the target size.
In addition, the pipe fitting machining equipment comprises the clamps 2 which are arranged at the first station and the second station and used for clamping the pipe fitting, the pipe fitting machining equipment can replace the clamps 2 of different types aiming at different batches of pipe fittings, and the clamping surfaces of the clamps 2 of different types are provided with different marking textures.
The pipe fitting processing equipment can adopt different clamps 2 according to different batches of pipe fittings 30, different marking textures are arranged on clamping surfaces of the different clamps 2, and marks can be formed on the outer surface of the pipe fitting 30 when the pipe fitting 30 is clamped, so that products can be traced in the future. In the scheme, only the end part of the pipe fitting is processed through the end part shaping die and the end part fine rule die to manufacture the pipe fitting with the accurate end part size, the connection requirement with other pipe fittings or joints is met, the fine rule processing of the part except the end part is not needed, the processing procedure and the processing cost are reduced, and the processing efficiency is improved; and marks can be formed on the pipe fitting for later tracing.
Wherein, tip smart chi mould can be tip smart heading mould or tip smart drawing die utensil, and the following pipe fitting processing equipment that will explain respectively including tip smart heading mould 10 and the pipe fitting processing equipment that includes tip smart drawing die 8.
Pipe fitting processing equipment comprising end part fine upsetting die 10
The invention provides a pipe fitting machining device which comprises an end part shaping die 1 located at a first station and an end part fine upsetting die 10 located at a second station, wherein the pipe fitting machining device can firstly perform primary end part shaping on a pipe fitting through the end part shaping die 1 and then perform fine upsetting on the end part of the pipe fitting through the end part fine upsetting die 10 to manufacture an end part fine ruler pipe fitting.
The pipe machining apparatus can perform end machining on a pipe, particularly for metal pipes such as steel pipes, and can perform drawing (e.g., cold drawing) on the pipe multiple times and blanking at the end before machining the pipe by using the pipe machining apparatus.
The pipe fitting machining equipment comprises an end part shaping die 1 and an end part fine upsetting die 10, wherein the end part shaping die 1 can carry out primary shaping on the end part of the pipe fitting, so that the end part of the pipe fitting is preliminarily formed into a target shape (for example, shaped into a standard circle) and is closer to a target size; then, the end of the preliminarily shaped pipe fitting is subjected to finish rule machining (namely, precise dimension machining) through the end fine upsetting die 10, so that the dimension of the end is more precise and meets the target dimension, namely, the end of the pipe fitting is machined into the target dimension in a fine upsetting mode.
In this scheme, only process the tip of pipe fitting through tip plastic mould and tip smart heading mould to make the pipe fitting that tip size is accurate, satisfy with the connection requirement of other pipe fittings or joints, need not do smart chi processing to the part outside the tip, reduced manufacturing procedure and processing cost, improved machining efficiency.
In addition, the pipe fitting machining equipment comprises a die oil cylinder 4 which can drive the end part shaping die 1 and the end part fine upsetting die 10 to open and close. The end shaping die 1 and the end fine upsetting die 10 can be opened and closed along a specific direction respectively, the dies need to be closed before the end of the pipe is machined, and the dies need to be opened to draw out the pipe after the end of the pipe is machined. In the pipe fitting processing equipment of this scheme, the direction of opening and shutting with tip plastic mould 1 and tip finish heading mould 10 sets up to keeping unanimous to can connect two moulds through the linkage, and drive two moulds through single mould hydro-cylinder 4 and open and shut synchronously, make the pipe fitting 30 of first station and second station carry out the tip processing synchronously.
Wherein the pipe is insertable into the end portion reforming die 1 and the end portion finish heading die 10 in a first direction, respectively, and the end portion reforming die 1 and the end portion finish heading die 10 are aligned in a second direction perpendicular to the first direction. Referring to fig. 1, the left-right direction is a first direction, and the up-down direction is a second direction. The pipe 30 extends in a first direction and is movable in the first direction relative to the end sizing die 1 and the end finish heading die 10 to insert or remove from the corresponding dies to effect machining of the ends of the pipe.
In addition, the pipe fitting machining equipment comprises a clamp 2 arranged at the first station and the second station, a clamp oil cylinder 5 used for driving the clamp 2, and a feeding oil cylinder 6 used for driving a pipe fitting to move from the first station to the second station. The first station and the second station can be respectively provided with a clamp 2 for clamping a pipe 30 positioned on the first station or the second station, and the clamp oil cylinder 5 can drive the clamp 2 to open and close so as to release and clamp the pipe 30. In some embodiments, the first and second stations of the gripper 2 and 2 may be connected by a linkage to open and close synchronously and driven by a single gripper cylinder 5; of course, the first station jig 2 and the second station jig 2 may be independent of each other and driven by different jig cylinders 5, respectively. The feed cylinder 6 can drive the tube 30 from the first station to the second station in a direction corresponding to the second direction.
In addition, the end shaping die 1 includes a die expanding mandrel 13, and the pipe machining apparatus includes a shaping cylinder 7 that drives the end shaping die 1 to move in the first direction. As shown in fig. 3, the end shaping die 1 includes two openable and closable die halves and a die-expanding mandrel 13 clamped between the die halves, and the die-expanding mandrel 13 can be inserted into an end of the pipe 30 to expand its inner diameter to a target size, and in particular, can form the inner circumferential surface of the pipe 30 into a circular shape. Wherein, the pipe fitting 30 clamped and fixed by the clamp 2 can be fixed at the first station, and the shaping oil cylinder 7 drives the die expanding mandrel 13 (or the whole end shaping die 1) to move towards the pipe fitting 30 so as to insert the die expanding mandrel 13 into the end of the pipe fitting to realize the primary shaping. The outer diameter of the die expanding mandrel 13 may be greater than the inner diameter of the end of the pipe to be swaged.
Wherein, tip finish-heading mould 10 includes upset die core rod 12, the pipe fitting processing equipment includes the drive tip finish-heading mould 10 is followed the finish-heading hydro-cylinder 11 that first direction removed. As shown in fig. 4, the end fine upsetting die 10 includes two openable half dies and an upsetting mandrel 12, the upsetting mandrel 12 is partially clamped between the two half dies and partially surrounded by the two half dies to form a fine upsetting chamber, and a fine upsetting cylinder 11 drives the end fine upsetting die 10 to move to allow the end of the pipe to be inserted into the fine upsetting chamber to perform a fine upsetting process.
In addition, the pipe fitting processing equipment comprises a support frame 3 which supports the end part shaping die 1 and the end part fine upsetting die 10 respectively, and the die oil cylinder 4 can drive the support frame 3 to deform so as to drive the end part shaping die 1 and the end part fine upsetting die 10 to open and close respectively. As shown in fig. 1, the supporting frame 3 includes an L-shaped connecting rod and a lever, one end of the connecting rod is connected to the lever, the other end of the connecting rod is connected to one half mold, the other end of the lever is connected to the other half mold, the connecting rod, the lever and the mold enclose a quadrilateral, at this time, the connecting rod is in a mold closing state, when the mold oil cylinder 4 drives the connecting rod to move along the second direction, the lever and the connecting rod rotate around a fulcrum, the two half molds are relatively far away from each other, and mold opening is realized.
In addition, as shown in fig. 1, an electromagnetic induction coil heating device 14 is located in front of (or only in front of) the end shaping die 1 and the end finish drawing die 8, the pipe can be moved through the electromagnetic induction coil heating device 14, and the end of the pipe can be electromagnetically induction heated before the pipe 30 enters the die.
Particularly, when the pipe enters the electromagnetic induction coil heating device 14, the induction coil is electrified, and after the pipe is electrified and heated for a preset time, the induction coil is powered off; wherein the current frequency is 3-5 KHZ. The heat time of pipe fitting is confirmed according to the wall thickness of pipe fitting, the unit of getting the wall thickness is the numerical value l of millimeter, the unit of heat time is the numerical value t of second, then t 22.5l +37.5, can calculate the required heat time of pipe fitting of different wall thicknesses according to this formula of calculating, make the temperature after the pipe fitting heating be in comparatively stable scope, it is corresponding, the physical properties of pipe fitting is also comparatively stable, the difference of different pipe fittings is less, be convenient for process out the performance, the same basic accurate chi pipe fitting of technical indicator.
Wherein the electromagnetic induction coil heating device 14 comprises an electromagnetic induction coil into which the end of the pipe can be inserted to achieve induction heating; the electromagnetic induction coil is electrically connected with the time relay, and the time relay can be set to be disconnected after being communicated for fixed time, so that the electromagnetic induction coil is powered off after being powered on for fixed time, correspondingly, the pipe fitting can be heated and fixed for a long time, and the heating time of each pipe fitting is guaranteed to be the same.
The wall thickness of the pipe fitting is 1-5mm, and correspondingly, the heating time is 60-150 s.
In addition, the pipe fitting processing equipment comprises a hydraulic driving mechanism, wherein the hydraulic driving mechanism is provided with an oil tank 61, an oil pump 62, the die oil cylinder 4, the clamp oil cylinder 5, the feeding oil cylinder 6, the shaping oil cylinder 7 and the fine upsetting oil cylinder 11. As shown in fig. 2, the die cylinder 4, the clamp cylinder 5, the feeding cylinder 6, the shaping cylinder 7 and the fine upsetting cylinder 11 are arranged in the same hydraulic pipeline and are hydraulically driven by the same oil pump 62, and the oil pump 62 is in transmission connection with a motor 63 and is driven by the motor 63 to operate. The oil inlet pipe of the oil pump 62 is provided with a check valve, and is connected with an overflow pipe, and an overflow valve 64 is arranged on the overflow pipe.
The feeding oil cylinder 6, the shaping oil cylinder 7 and the fine upsetting oil cylinder 11 are respectively connected with an oil inlet pipe and an oil return pipe through three first reversing valves 65. The feeding oil cylinder 6, the shaping oil cylinder 7 and the fine upsetting oil cylinder 11 are connected in parallel and are independent of one another, a first reversing valve 65 is arranged on a pipeline where each oil cylinder is located, and the first reversing valves 65 achieve cutting, communication and reversing of the pipelines so as to control the corresponding oil cylinders to stretch out and draw back. When the pipe fitting machining equipment runs, the feeding oil cylinder 6, the shaping oil cylinder 7 and the fine upsetting oil cylinder 11 can be independently controlled respectively.
And hydraulic locks 68 are arranged on pipelines of the feeding oil cylinder 6, the shaping oil cylinder 7 and the fine upsetting oil cylinder 11 respectively. The hydraulic lock 68 is arranged on the oil inlet pipe and the oil return pipe, and can disconnect or connect pipelines, so that the safety is improved.
In addition, the mold cylinder 4 and the clamp cylinder 5 are connected in parallel to an oil inlet pipe and an oil return pipe through a second reversing valve 66, wherein a sequence valve 67 is arranged on a pipeline of a cavity with a rod of the mold cylinder 4, and a sequence valve 67 is arranged on a pipeline without a rod of the clamp cylinder 5; or a sequence valve 67 is arranged on the rodless cavity pipeline of the mold oil cylinder 4, and a sequence valve 67 is arranged on the rod cavity pipeline of the clamp oil cylinder 5. The mold cylinder 4 and the clamp cylinder 5 are connected in parallel with each other, and the rodless cavity of the mold cylinder 4 communicates with the rodless cavity of the clamp cylinder 5, and the rod cavity of the mold cylinder 4 communicates with the rod cavity of the clamp cylinder 5.
In one embodiment, a sequence valve 67 is arranged on the rodless cavity pipeline of the mold cylinder 4, a sequence valve 67 is arranged on the rod cavity pipeline of the clamp cylinder 5, when the second reversing valve 66 enables the oil inlet pipe to be communicated with the rod cavity pipeline of the mold cylinder 4 and the rod cavity pipeline of the clamp cylinder 5, the mold cylinder 4 extends out, the clamp cylinder 5 is kept static, when the mold cylinder 4 extends completely, the sequence valve 67 on the rod cavity pipeline of the clamp cylinder 5 starts to be communicated under higher oil pressure, and the clamp cylinder 5 starts to extend; when the second direction change valve 66 causes the oil feed pipe to communicate with the rodless cavity line of the mold cylinder 4 and the rodless cavity line of the jig cylinder 5, the jig cylinder 5 starts to retract while the mold cylinder 4 remains stationary, and when the jig cylinder 5 is completely retracted, the sequence valve 67 on the rod cavity line of the mold cylinder 4 starts to communicate at a greater oil pressure. In this embodiment, the mold cylinder 4 extends out of the clamp cylinder 5 and then extends out, and the clamp cylinder 5 retracts back after retracting the mold cylinder 4, so that the mold is closed first and then the pipe 2 is clamped by the clamp 2, and then the clamp 2 releases the pipe mold and opens the mold.
In another embodiment, the pipe of the rod cavity of the mold cylinder 4 is provided with a sequence valve 67, and the pipe of the rodless cavity of the clamp cylinder 5 is provided with a sequence valve 67, which is the same as the principle of the above embodiments, and the mold and the clamp can be opened and closed according to a specific sequence, and the description is not repeated here.
Pipe fitting processing equipment comprising end part fine drawing die 8
The invention provides pipe fitting machining equipment, which comprises an end part shaping die 1 positioned at a first station and an end part fine drawing die 8 positioned at a second station, wherein the pipe fitting machining equipment can firstly carry out primary end part shaping on a pipe fitting through the end part shaping die 1 and then carry out fine drawing on the end part of the pipe fitting through the end part fine drawing die 8 so as to manufacture an end part fine ruler pipe fitting.
The pipe machining apparatus can perform end machining on a pipe, particularly on a metal pipe such as a steel pipe, and can draw (e.g., cold-draw) the pipe multiple times and blank the end before machining it using the pipe machining apparatus.
The pipe fitting machining equipment comprises an end part shaping die 1 and an end part fine drawing die 8, wherein the end part shaping die 1 can carry out primary shaping on the end part of the pipe fitting, so that the end part of the pipe fitting is preliminarily formed into a target shape (for example, shaped into a standard circle) and is closer to a target size; then, the end of the preliminarily shaped pipe fitting is subjected to fine sizing (i.e., precise dimension processing) by the end fine-drawing die 8, so that the dimension of the end is more precise and meets the target dimension, that is, the end of the pipe fitting is processed to the target dimension by adopting a fine-drawing mode.
In this scheme, only process the tip of pipe fitting through tip plastic mould and tip finish draw mould to make the pipe fitting that the tip size is accurate, satisfy with the connection requirement of other pipe fittings or joint, need not do the finish rule processing to the part outside the tip, reduced manufacturing procedure and processing cost, improved machining efficiency.
In addition, the pipe fitting processing equipment comprises a die oil cylinder 4 which can drive the end shaping die 1 and the end fine drawing die 8 to open and close. The end shaping die 1 and the end finish drawing die 8 can be opened and closed along a specific direction respectively, the dies need to be closed before the end of the pipe fitting is machined, and the dies need to be opened to draw out the pipe fitting after the end of the pipe fitting is machined. In the pipe fitting processing equipment of this scheme, set up the direction of opening and shutting of tip plastic mould 1 and tip finish draw mould 8 to keep unanimous to can connect two moulds through the linkage, and drive two moulds through single mould hydro-cylinder 4 and open and shut synchronously, make the pipe fitting 30 of first station and second station can carry out the tip processing synchronously.
Wherein the pipe is insertable into the end shaping die 1 and the end finish drawing die 8, respectively, in a first direction, and the end shaping die 1 and the end finish drawing die 8 are aligned in a second direction perpendicular to the first direction. Referring to fig. 5, the left-right direction is a first direction, and the up-down direction is a second direction. The pipe 30 extends in a first direction and is movable in the first direction relative to the end shaping die 1 and the end finish drawing die 8 to insert into or remove from the respective dies to effect machining of the ends of the pipe.
In addition, the pipe fitting machining equipment comprises a clamp 2 arranged at the first station and the second station, a clamp oil cylinder 5 used for driving the clamp 2, and a feeding oil cylinder 6 used for driving a pipe fitting to move from the first station to the second station. The first station and the second station can be respectively provided with a clamp 2 for clamping a pipe 30 positioned on the first station or the second station, and the clamp oil cylinder 5 can drive the clamp 2 to open and close so as to release and clamp the pipe 30. In some embodiments, the first and second stations of the gripper 2 and 2 may be connected by a linkage to open and close synchronously and driven by a single gripper cylinder 5; of course, the first station jig 2 and the second station jig 2 may be independent of each other and driven by different jig cylinders 5, respectively. The feed cylinder 6 can drive the tube 30 from the first station to the second station in a direction corresponding to the second direction.
In addition, the end shaping die 1 comprises a die expanding mandrel 13, and the pipe machining equipment comprises a shaping oil cylinder 7 for driving the end shaping die 1 to move along the first direction. As shown in fig. 3, the end shaping die 1 includes two die halves and a die expanding mandrel 13 clamped between the die halves, and the die expanding mandrel 13 may be inserted into an end of the pipe 30 to expand an inner diameter thereof to a target size, and particularly, may form an inner circumferential surface of the pipe 30 in a circular shape. Wherein, the pipe fitting 30 clamped and fixed by the clamp 2 can be fixed at the first station, and the shaping oil cylinder 7 drives the die expanding mandrel 13 (or the whole end shaping die 1) to move towards the pipe fitting 30 so as to insert the die expanding mandrel 13 into the end of the pipe fitting to realize the primary shaping. The outer diameter of the die expanding mandrel 13 may be greater than the inner diameter of the end of the pipe to be swaged.
In addition, the pipe machining equipment comprises a fine drawing oil cylinder 9 which is positioned at the second station and is used for driving the pipe to face and be far away from the end fine drawing die 8. As shown in fig. 7, the end fine-drawing die 8 includes two openable half dies, the two half dies enclose a fine-drawing cavity, and the fine-drawing cylinder 9 can drive the pipe 30 to be inserted into the fine-drawing cavity, so as to perform fine-drawing processing on the end of the pipe.
In addition, the pipe fitting processing equipment comprises a support frame 3 which supports the end part shaping die 1 and the end part fine drawing die 8 respectively, and the die oil cylinder 4 can drive the support frame 3 to deform so as to drive the end part shaping die 1 and the end part fine drawing die 8 to open and close respectively. As shown in fig. 5, the supporting frame 3 includes an L-shaped connecting rod and a lever, one end of the connecting rod is connected to the lever, the other end of the connecting rod is connected to one half die, the other end of the lever is connected to the other half die, the connecting rod, the lever and the die enclose a quadrilateral, and at this time, the connecting rod, the lever and the die are in a die closing state, when the die cylinder 4 drives the connecting rod to move along the second direction, the lever and the connecting rod rotate around a fulcrum, and the two half dies are relatively far away from each other, so that the die opening is realized.
In addition, as shown in fig. 5, an electromagnetic induction coil heating device 14 is located in front of (or only in front of) the end shaping die 1 and the end finish heading die 10, and the pipe can be moved through the electromagnetic induction coil heating device 14 to electromagnetically induction heat the end of the pipe before the pipe 30 enters the dies.
Particularly, when the pipe enters the electromagnetic induction coil heating device 14, the induction coil is electrified, and after the pipe is electrified and heated for a preset time, the induction coil is powered off; wherein the current frequency is 3-5 KHZ. The heat time of pipe fitting is confirmed according to the wall thickness of pipe fitting, the unit of getting the wall thickness is the numerical value l of millimeter, the unit of heat time is the numerical value t of second, then t is 22.5l +37.5, can calculate the required heat time of pipe fitting of different wall thicknesses according to this formula of calculating, make the temperature after the pipe fitting heating be in comparatively stable scope, it is corresponding, the physical properties of pipe fitting is also comparatively stable, the difference of different pipe fittings is less, be convenient for process out the performance, the same accurate chi pipe fitting of technical index basic.
Wherein the electromagnetic induction coil heating device 14 comprises an electromagnetic induction coil into which the end of the pipe can be inserted to achieve induction heating; electromagnetic induction coil is connected with the time relay electricity, and time relay can set up to the disconnection after the intercommunication fixed time for electromagnetic induction coil circular telegram fixed time back outage, and is corresponding, and the pipe fitting can heat fixed long time, guarantees that the heat time of each pipe fitting is the same.
The wall thickness of the pipe fitting is 1-5mm, and correspondingly, the heating time is 60-150 s.
In addition, the pipe fitting processing equipment comprises a hydraulic driving mechanism, wherein the hydraulic driving mechanism is provided with an oil tank 61, an oil pump 62, the die oil cylinder 4, the clamp oil cylinder 5, the feeding oil cylinder 6, the fine drawing oil cylinder 9 and the shaping oil cylinder 7. As shown in fig. 6, the mold cylinder 4, the clamp cylinder 5, the feeding cylinder 6, the shaping cylinder 7, and the finish drawing cylinder 9 are arranged in the same hydraulic pipeline, and are hydraulically driven by the same oil pump 62, and the oil pump 62 is in transmission connection with a motor 63 and is driven by the motor 63 to operate. The oil inlet pipe of the oil pump 62 is provided with a one-way valve, and is connected with an overflow pipe, and an overflow valve 64 is arranged on the overflow pipe.
The feeding oil cylinder 6, the finish drawing oil cylinder 9 and the shaping oil cylinder 7 are respectively connected to an oil inlet pipe and an oil return pipe through three first reversing valves 65. The feeding oil cylinder 6, the shaping oil cylinder 7 and the fine drawing oil cylinder 9 are connected in parallel and are mutually independent, a pipeline where each oil cylinder is located is provided with a first reversing valve 65, and the first reversing valves 65 realize the cutting, communication and reversing of the pipelines so as to control the extension and retraction of the corresponding oil cylinders. When the pipe fitting processing equipment runs, the feeding oil cylinder 6, the shaping oil cylinder 7 and the fine drawing oil cylinder 9 can be respectively and independently controlled.
And hydraulic locks 68 are arranged on pipelines of the feeding oil cylinder 6, the fine pulling oil cylinder 9 and the shaping oil cylinder 7 respectively. The hydraulic lock 68 is arranged on the oil inlet pipe and the oil return pipe, and can disconnect or connect pipelines, so that the safety is improved.
In addition, the mold cylinder 4 and the clamp cylinder 5 are connected in parallel to an oil inlet pipe and an oil return pipe through a second reversing valve 66, wherein a sequence valve 67 is arranged on a pipe of a rod cavity of the mold cylinder 4, and a sequence valve 67 is arranged on a pipe of a tube without a rod cavity of the clamp cylinder 5; or a sequence valve 67 is arranged on the rodless cavity pipeline of the mold oil cylinder 4, and a sequence valve 67 is arranged on the rod cavity pipeline of the clamp oil cylinder 5. The mold cylinder 4 and the clamp cylinder 5 are connected in parallel with each other, and the rodless cavity of the mold cylinder 4 is communicated with the rodless cavity of the clamp cylinder 5, and the rod cavity of the mold cylinder 4 is communicated with the rod cavity of the clamp cylinder 5. In fig. 6, the pipelines in which the two clamp cylinders 5 are located are substantially the same.
In one embodiment, the sequence valve 67 is disposed on the rodless cavity pipeline of the mold cylinder 4, and the sequence valve 67 is disposed on the rod cavity pipeline of the clamp cylinder 5, when the second direction valve 66 communicates the oil inlet pipe with the rod cavity pipeline of the mold cylinder 4 and the rod cavity pipeline of the clamp cylinder 5, the mold cylinder 4 extends out, while the clamp cylinder 5 remains stationary, when the mold cylinder 4 extends completely, the sequence valve 67 on the rod cavity pipeline of the clamp cylinder 5 starts to communicate under a greater oil pressure, and the clamp cylinder 5 starts to extend; when the second direction change valve 66 causes the oil feed pipe to communicate with the rodless cavity line of the mold cylinder 4 and the rodless cavity line of the jig cylinder 5, the jig cylinder 5 starts to retract while the mold cylinder 4 remains stationary, and when the jig cylinder 5 is completely retracted, the sequence valve 67 on the rod cavity line of the mold cylinder 4 starts to communicate at a greater oil pressure. In this embodiment, the mold cylinder 4 extends out of the clamp cylinder 5 and then extends out, and the clamp cylinder 5 retracts into the mold cylinder 4 and then retracts, so that the mold is closed first and then the pipe 2 is clamped by the clamp 2, and then the clamp 2 releases the pipe mold and opens the mold.
In another embodiment, the pipe line of the rod cavity of the mold cylinder 4 is provided with a sequence valve 67, and the pipe line of the rodless cavity of the clamp cylinder 5 is provided with a sequence valve 67, which is the same as the principle of the above embodiment, and the mold and the clamp can be opened and closed according to a specific sequence, which will not be repeated herein.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the specific features in any suitable way, and the invention will not be further described in relation to the various possible combinations in order to avoid unnecessary repetition. Such simple modifications and combinations should also be considered as disclosed in the present invention, and all such modifications and combinations are intended to be included within the scope of the present invention.

Claims (10)

1. The pipe fitting machining equipment is characterized by comprising an end part shaping die (1) positioned at a first station, an end part precise ruler die positioned at a second station and a clamp (2) which is arranged at the first station and the second station and used for clamping a pipe fitting, wherein the pipe fitting machining equipment can firstly carry out primary end part shaping on the pipe fitting through the end part shaping die (1) and then carry out precise ruler on the end part of the pipe fitting through the end part precise ruler die so as to manufacture an end part precise ruler pipe fitting,
the pipe fitting machining equipment comprises a support frame (3) and a mould oil cylinder (4), wherein the support frame (3) is used for supporting the end part shaping mould (1) and the end part precise ruler mould respectively, the mould oil cylinder (4) can drive the support frame (3) to deform so as to drive the end part shaping mould (1) and the end part precise ruler mould to open and close respectively, the end part shaping mould (1) and the end part precise ruler mould are respectively provided with two half moulds, the support frame (3) comprises an L-shaped connecting rod and a lever, one end of the connecting rod is connected to the lever, the other end of the connecting rod is connected to one half mould, the other end of the lever is connected to the other half mould, the connecting rod, the lever, the end part shaping mould (1) or the end part precise ruler mould enclose a quadrangle, at the moment, the end part shaping mould (1) or the end part precise ruler mould is in a mould closing state, and when the mould oil cylinder (4) drives the connecting rod to move, the lever rotates around the fulcrum, and the two half moulds are relatively far away from each other, so that the mould opening is realized.
2. Pipe machining apparatus according to claim 1, characterized in that it is possible to replace different types of said clamps (2) for different batches of pipes, and in that the gripping surfaces of said different types of clamps (2) are provided with different marking textures.
3. Pipe machining apparatus according to claim 2, characterized in that it comprises a clamp cylinder (5) for actuating the opening and closing of the clamp (2).
4. A pipe machining apparatus as claimed in claim 1 or 2, characterized in that the pipe is insertable in a first direction into the end reforming die (1) and the end finishing die, respectively, and the end reforming die (1) and the end finishing die are aligned in a second direction perpendicular to the first direction.
5. A pipe machining apparatus according to claim 1, characterized in that the end-shaping die (1) comprises a die-expanding mandrel (13), and the pipe machining apparatus comprises a shaping cylinder (7) driving the die-expanding mandrel (13) to move in a first direction.
6. A tubular machining apparatus according to claim 5 characterized in that the tubular machining apparatus includes a feed cylinder (6) for driving a tubular from the first station to the second station.
7. Pipe machining apparatus according to claim 6, characterized in that the end sizing die is an end heading die (10).
8. The tubular machining apparatus of claim 7 including a finish heading cylinder (11) for driving the end finish heading die (10) to move in the first direction.
9. Pipe machining apparatus according to claim 6, characterized in that the end sizing die is an end sizing die (8).
10. A pipe machining apparatus according to claim 9, characterized in that it comprises a fine drawing cylinder (9) for driving the pipe in the first direction towards and away from the end fine drawing die (8).
CN202110726244.8A 2021-06-29 2021-06-29 Pipe fitting processing equipment Active CN113579134B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3225581A (en) * 1961-08-21 1965-12-28 Price Pfister Brass Mfg Metal forming process for shaping ends of tubes
JP2001246524A (en) * 2000-03-02 2001-09-11 Irie Sangyo:Kk Working method of tubular body and working device
CN200960539Y (en) * 2006-10-27 2007-10-17 张海勇 Pipe-expanding mechanism
CN201385091Y (en) * 2009-04-09 2010-01-20 潍坊亿斯特管业科技有限公司 Electric wire casing pipe expanding machine
CN101920295A (en) * 2009-06-09 2010-12-22 王滨 Automatic six-working position rotary expanding pipe-end forming device
CN207414191U (en) * 2017-10-12 2018-05-29 台州市华丰空调阀门有限公司 Automatic flare formation equipment
CN211331041U (en) * 2019-12-23 2020-08-25 江苏金鑫电器有限公司 Flaring device for aluminum alloy pipe
CN111318615A (en) * 2020-04-13 2020-06-23 国琳(天津)科技有限公司 Stepping type pipe end forming machine

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