CN206240976U - A kind of mandrel of hot-strip downcoiler reel - Google Patents
A kind of mandrel of hot-strip downcoiler reel Download PDFInfo
- Publication number
- CN206240976U CN206240976U CN201621322609.1U CN201621322609U CN206240976U CN 206240976 U CN206240976 U CN 206240976U CN 201621322609 U CN201621322609 U CN 201621322609U CN 206240976 U CN206240976 U CN 206240976U
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- mandrel
- hot
- mounting groove
- plunger
- strip
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Abstract
The utility model discloses a kind of mandrel of hot-strip downcoiler reel, the two ends of mandrel are the connection end for installing connecting rods, centre is the changeover portion and plunger construction section that are alternately arranged, it is circumferentially disposed on the plunger construction section to have multiple mutually disconnected mounting grooves, it is the entity for proof strength between adjacent two mounting groove, the bottom surface of mounting groove is inclined-plane.The utility model sets multiple mutually disconnected mounting grooves by plunger construction section, make between adjacent two mounting groove for entity, plunger is placed in mounting groove and is moved along groove bottom, bulk strength is improved by the entity for retaining, while reducing service life of the mutability of structure to reduce stress concentration so as to improve mandrel.
Description
Technical field
The utility model is related to a kind of mandrel of coiling machine, more particularly to a kind of core of hot-strip downcoiler reel
Axle.
Background technology
Coiling machine is the mill ancillaries that hot rolling or cold rolling steel are coiled into drum, in hot strip continuous-rolling machine
（Hot tandem）, be arranged in after finished product support on coldstrip tandem mill and rod-rolling mill；In the reversible cold strip rolling mill of single stand
On it is then front and rear installed in milling train.Additionally, it is also installed in the various Precise asymptotics such as continuous acid-washing unit, slitting, annealing, coating
In.And hot-strip downcoiler reel realizes that the operation principle of breathing is：Oil cylinder pulls mandrel to be moved rearwards by, and mandrel passes through
Pyramidal surface promotes plunger to move top upwards and opens fanning strip, realizes swelling for reel；Oil cylinder pushing mandrel is moved forward, and mandrel is pulled
Connecting rod, connecting rod pulls fanning strip to realize the diminution of reel.As shown in figure 3, the shape of the plunger position of mandrel connection at present is similar to
Pyramid, and shape is undergone mutation easily and the damage that stress concentration causes mandrel occurs at its minimum path position.Inventor passes through will
Certain steel mill's service condition is counted such hot-strip downcoiler reel at home, and current online three reel mandrels break
Splitting has two, and fracture position is at the minimum diameter position of mandrel pyramidal surface bottom.
Utility model content
The purpose of this utility model is to provide a kind of hot-strip downcoiler volume of intensity reliability long service life
The mandrel of cylinder.
The mandrel of this hot-strip downcoiler reel that the utility model is provided, the two ends of mandrel are for installing
The connection end of connecting rod, centre is the changeover portion and plunger construction section that are alternately arranged, along the circumferential direction cloth on the plunger construction section
Multiple mutually disconnected mounting grooves are equipped with, are the entity for proof strength between adjacent two mounting groove, the bottom surface of mounting groove is
Inclined-plane.
For the ease of processing and positioning, make the flute length of the mounting groove less than the length of the plunger construction section.
For the reliability for ensureing to expand and reduce, four installations are along the circumferential direction evenly equipped with the plunger construction section
Groove.
For the ease of lubrication, oil filler point is provided with the axial centre of the mandrel.
In order to further improve the effect of lubrication, oiling groove, oiling groove and the note are provided with the bottom surface of the mounting groove
Connected by oil channel between oilhole.
Further, make the oil channel for circular hole, one end of oil channel connects with the oiling groove, the other end with it is described
Oil filler point is connected.
The utility model sets multiple mutually disconnected mounting grooves by plunger construction section, makes between adjacent two mounting groove
It is entity, plunger is placed in mounting groove and is moved along groove bottom, bulk strength is improved by the entity for retaining, while reduces structure
Service life of the mutability to reduce stress concentration so as to improve mandrel.
Brief description of the drawings
Fig. 1 is one schematic front view of preferred embodiment of the utility model.
Fig. 2 is section enlarged diagram at A in Fig. 1.
Fig. 3 is enlarged diagram at B in Fig. 2.
Fig. 4 is the assembling schematic diagram of existing product.
Diagram sequence number：
1-mandrel, 11-connection end, 12-changeover portion, 13-plunger construction section, 14-mounting groove, 15-entity, 16-
Oil filler point, 17-oiling groove, 18-oil channel.
Specific embodiment
As shown in Fig. 1-3, a kind of mandrel of hot-strip downcoiler reel is present embodiments provided, the mandrel 1
Two ends are the connection end 11 for installing connecting rods, and centre is the changeover portion 12 and plunger construction section 13 that are alternately arranged, and plunger is installed
Four mounting grooves 14 are along the circumferential direction evenly equipped with section, are the entity 15 for proof strength, entity between adjacent two mounting groove
Play a part of reinforcement during the use of mandrel, on the one hand improve overall intensity, another convenient increase mandrel shape
Diameter at shape mutation, reduces the influence of stress concentration, while the flute length of mounting groove is designed as into the length less than plunger construction section
Degree, groove depth are successively decreased along its length, are used to reduce the mutation of shape so as to reduce stress concentration phenomenon, improve the use longevity of mandrel
Life.The axial centre of mandrel is provided with oil filler point 16, and the bottom surface of mounting groove is provided with oiling groove 17, and oiling groove passed through oil with oil filler point
Road 18 is connected, to ensure the lubricant effect during mandrel use.
The present embodiment provide this core barrel be with differ primarily in that on mandrel four pyramidal surfaces of existing mandrel
Mutually disconnect, the junction equivalent to each two pyramidal surface both increases reinforcement.So there is very big carrying in intensity
Height, also significantly reduces the danger being broken at the minimum diameter position of mandrel pyramidal surface bottom.And for two mandrels
Static Strength Analysis contrast knows that the intensity of this mandrel that the present embodiment is provided about improves on the basis of former mandrel intensity
24.9%, the stressing conditions of pyramidal surface are effectively improved, reduce further at the minimum diameter position of mandrel pyramidal surface bottom
The danger of fracture.Stability and reliability that raising is used, extend service life.
Claims (6)
1. a kind of mandrel of hot-strip downcoiler reel, the two ends of mandrel are the connection end for installing connecting rods, middle
It is the changeover portion and plunger construction section that are alternately arranged, it is characterised in that：It is circumferentially disposed on the plunger construction section to have many
Individual mutually disconnected mounting groove, is the entity for proof strength between adjacent two mounting groove, and the bottom surface of mounting groove is inclined-plane.
2. the mandrel of hot-strip downcoiler reel according to claim 1, it is characterised in that：The mounting groove
Length of the flute length less than the plunger construction section.
3. the mandrel of hot-strip downcoiler reel according to claim 1, it is characterised in that：The plunger is installed
Four mounting grooves are along the circumferential direction evenly equipped with section.
4. the mandrel of hot-strip downcoiler reel according to claim 1, it is characterised in that：The axle of the mandrel
Oil filler point is provided with to center.
5. the mandrel of hot-strip downcoiler reel according to claim 4, it is characterised in that：The mounting groove
Bottom surface is provided with oiling groove, is connected by oil channel between oiling groove and the oil filler point.
6. the mandrel of hot-strip downcoiler reel according to claim 5, it is characterised in that：The oil channel is
Circular hole, one end of oil channel is connected with the oiling groove, the other end is connected with the oil filler point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621322609.1U CN206240976U (en) | 2016-12-05 | 2016-12-05 | A kind of mandrel of hot-strip downcoiler reel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621322609.1U CN206240976U (en) | 2016-12-05 | 2016-12-05 | A kind of mandrel of hot-strip downcoiler reel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206240976U true CN206240976U (en) | 2017-06-13 |
Family
ID=59005186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621322609.1U Active CN206240976U (en) | 2016-12-05 | 2016-12-05 | A kind of mandrel of hot-strip downcoiler reel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206240976U (en) |
-
2016
- 2016-12-05 CN CN201621322609.1U patent/CN206240976U/en active Active
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