CN109420685A - Cold drawing accurate steel tube wall thickness adjusting mechanism - Google Patents
Cold drawing accurate steel tube wall thickness adjusting mechanism Download PDFInfo
- Publication number
- CN109420685A CN109420685A CN201710759096.3A CN201710759096A CN109420685A CN 109420685 A CN109420685 A CN 109420685A CN 201710759096 A CN201710759096 A CN 201710759096A CN 109420685 A CN109420685 A CN 109420685A
- Authority
- CN
- China
- Prior art keywords
- external mold
- core model
- wall thickness
- cold drawing
- mold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- B21C1/24—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 by means of mandrels
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
Abstract
A kind of cold drawing accurate steel tube wall thickness adjusting mechanism, it include external mold, core model, wherein external mold is arranged in the middle rack of drawbench, core model is equipped in external mold, its main feature is that the work belt of the external mold is equipped with 2 °~4 ° of small-angle, the core model is connected with one end of pull rod, the other end of the pull rod is connected with screw rod, screw jacket has conveyor screw, and the outer surface band of conveyor screw is with teeth, and is connected by gear and speed reducer with AC servo motor.The case where present invention can be according to die wear, the pull rod connected by AC servo machinery driving with core model and the spiral width in tie rod end, relative position by adjusting external mold and core model on central axes at any time, reach influence of the compensation die wear to thickness of steel pipe deviation, to solve the problems, such as that abrasion when cold drawing precision tube because of mold leads to the wall thickness change of fished pipe.
Description
Technical field
The present invention relates to a kind of cold-drawn steel pipe devices to belong to more particularly to a kind of cold drawing accurate steel tube wall thickness adjusting mechanism
In the processing technology of metal pipe material.
Background technique
It is well known that the main component of the cold-drawn machine of steel pipe is a mold being placed in rack, the mold is by hard alloy
Be made, pipe is clamped by mold by tube drawing tonger, dynamic power machine strength traction under, the wall thickness deformation of pipe and reach institute
Need size.Currently, the wall thickness of cold drawing precision tube relies on the inside and outside cold drawing mold with certain size to control, continuous
In use process, the abrasion of mold leads to the wall thickness change of fished pipe, eventually leads to waste product or mold is scrapped, therefore, cold drawing
The mold wear and tear expense of steel pipe accounts for always the 15~20% of entire manufacturing expense, and is also unstable important of tube quality
One of factor.In recent years, people have once carried out multiple improvement to steel pipe cold-drawn machine and its component, for example, Publication No.
The Chinese utility model patent of CN88211512 gives a kind of " cold drawing essence pipe mill ", including a combination roller has, splits its left side
The one pipe bracket on right side and a tonger.Combination roller tool, which is constituted, a hollow turntable shaft, and interval installation three is rolled on end plate
Roller.When turntable shaft is rotated by motor driven, the circular rolling hole in roll seam shape face one draws and rolls mouth.It is rolled during rolling and drawing
Roller is affected and rotation by pipe.The Chinese utility model patent of Publication No. CN2608176 also gives a kind of " steel tubes
Hydraulic cold-drawn machine ", it includes fuselage, electric hoist and guide rail, there is the material guide hole of tubular in the middle part of hydraulic cylinder piston rod,
Hydraulic cylinder is horizontally fixed on the stile of electric hoist；There is material guide hole corresponding with piston rod in the middle part of hydraulic disk, it is hydraulic
Disk is fixed on the front end of cylinder piston rod, is also evenly distributed with hinge seat on the periphery of hydraulic disk, drive rod by hinge seat with
The connection of hydraulic disk hinge；Rotating arm is equipped on the pinch roller frame equipped with pinch roller, pinch roller frame is connect with the vertical plate hinge of stile front end,
Rotating arm and drive rod axis connection on pinch roller frame.But above-mentioned improvement can not be solved because of mold to wear when cold drawing precision tube and be led
The problem of causing the wall thickness change of fished pipe.
Summary of the invention
The object of the invention is that overcoming deficiencies of the prior art, that is, solve current mold loss and steel
The easily overproof problem of thickness of pipe wall, gives a kind of cold drawing accurate steel tube wall thickness adjusting mechanism.The device can be according to die wear
The case where, by adjusting the relative position of external mold and core model on central axes, reach compensation die wear to thickness of steel pipe deviation
Influence.
The technical solution that the present invention provides is: this cold drawing accurate steel tube wall thickness adjusting mechanism, includes external mold, core
Mould, wherein external mold is arranged in the middle rack of drawbench, core model is equipped in external mold, its main feature is that the work belt of the external mold is set
There is 2 °~4 ° of small-angle, the core model is connected with one end of pull rod, and the other end of the pull rod is connected with screw rod, outside screw rod
It is cased with conveyor screw, the outer surface band of conveyor screw is with teeth, and is connected by gear and speed reducer with AC servo motor.
Since the work belt of external mold is equipped with 2 °~4 ° small-angles, external mold is fixed structure, and core model is bascule, and core model can
With moved on the same axis of external mold.When core model and external mold relative position difference on the same axis, core model and external mold work
Clearance distance between band will generate variation.Pass through control AC servo motor rotation, so that it may the case where according to die wear,
Relative position of the adjustment core model and external mold on central axes at any time, to guarantee design of the wall thickness in product requirement of cold-drawn steel pipe
Within index.
Compared with prior art, the invention has the benefit that there is structure to be simple and convenient to operate, significant effect and just
In existing cold-drawn machine is transformed the characteristics of, the ratio that die cost accounts for cold-drawn steel pipe manufacturing expense can be not only reduced, not more
In the case where mold exchange, can also the thickness to steel pipe carry out the adjustment not less than 10%, can also be on whole steel pipe suitable
When range adjustment different length section thickness of steel pipe.
Detailed description of the invention:
The present invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the working principle of the invention figure；
Fig. 2 is structural schematic diagram of the invention；
Fig. 3 is the partial enlarged view of Fig. 2.
Specific embodiment
Figure label: 1. core models, 2. external molds, rack in 3., 4. external mold plate washers, 5. pull rods, 6. rear frames, 7. positioning rings,
8. conveyor screw, 9. screw rods, 10. gears, 11. speed reducers, 12. AC servo motors, 13. pulling-rod frames, 14. pull rod tails, 15. are drawn
Bar vehicle, 16. scroll wheels.
Fig. 1 shows in the case of 2 inner ring work belt of external mold has 2 °~4 ° small-angles, core model 1 on 2 central axes of external mold
When different location, the clearance distance between 2 inner ring work belt of core model 1 and external mold is different, when being in (position 1) A, has larger
Clearance t 1, when being in (position 2) B, have lesser clearance t 2.With the variation of this relative position, worn in gap
The thickness of steel pipe crossed will change.In Fig. 2, Fig. 3, this cold drawing accurate steel tube wall thickness adjusting mechanism includes external mold
2, core model 1, wherein external mold 2 is arranged in the middle rack of drawbench, and core model 1 is equipped in external mold 2, and the work belt of external mold 2 is equipped with 2 °
~4 ° of small-angle β, the core model 1 are connected with one end of pull rod 5, and the other end of the pull rod 5 is connected with screw rod 9, screw rod 9
It is cased with conveyor screw 8 outside, the outer surface band of conveyor screw 8 is with teeth, and passes through gear 10 and speed reducer 11 and 12 phase of AC servo motor
Connection.It is determined by the rotation position of the back-connected screw rod 9 of pull rod 5 and conveyor screw 8 relative position of core model 1 and external mold 2 in X direction
Fixed, the outer surface band of conveyor screw 8 is with teeth and gear 10 forms a machine driving pair, when servo motor 12 external command (such as
Computer) control lower rotation when, drive gear 10 to rotate by speed reducer 11, the position of conveyor screw 8 will change in X direction,
Under the limitation of plate washer 7, adjust core model 1 and external mold 2 relative position, so that it may complete it is proposed by the present invention can be according to mold
The case where abrasion, reaches compensation die wear to thickness of steel pipe by adjusting the relative position of external mold and core model on central axes
The goal of the invention of the influence of deviation.
Claims (1)
1. a kind of cold drawing accurate steel tube wall thickness adjusting mechanism includes external mold, core model, wherein the middle machine of drawbench is arranged in external mold
On frame, core model is equipped in external mold, it is characterised in that the work belt of the external mold is equipped with 2 °~4 ° of small-angle, the core model
It is connected with one end of pull rod, the other end of the pull rod is connected with screw rod, and screw jacket has conveyor screw, the outer surface band of conveyor screw
It is with teeth, and be connected by gear and speed reducer with AC servo motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710759096.3A CN109420685A (en) | 2017-08-30 | 2017-08-30 | Cold drawing accurate steel tube wall thickness adjusting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710759096.3A CN109420685A (en) | 2017-08-30 | 2017-08-30 | Cold drawing accurate steel tube wall thickness adjusting mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109420685A true CN109420685A (en) | 2019-03-05 |
Family
ID=65503784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710759096.3A Pending CN109420685A (en) | 2017-08-30 | 2017-08-30 | Cold drawing accurate steel tube wall thickness adjusting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109420685A (en) |
-
2017
- 2017-08-30 CN CN201710759096.3A patent/CN109420685A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190305 |
|
| WD01 | Invention patent application deemed withdrawn after publication |