CN103861977A - Roller hot rolling machine and hole pattern roller - Google Patents

Abstract

The invention provides a roller hot rolling machine and a hole pattern roller. The hole pattern roller comprises a roller body, wherein the side wall of the roller body is provided with helical convex ribs, every two adjacent convex ribs form a roller hole pattern with the outer wall of the roller body, and one side of each convex rib is provided with a storage groove. The hot rolling machine comprises a drive device and a machine body, wherein one side of a feeding end of the machine body is provided with a material wheel and a heating furnace, the discharging end of the machine body is provided with a material passage, two universal joint transmission devices are driven by the drive device to rotate, the two universal joint transmission devices are respectively connected with a main shaft of a cylindrical roller and a main shaft of the hole pattern roller, the cylindrical roller is arranged on the machine body through a cylindrical roller bearing seat, and the hole pattern roller is arranged on the machine body through a hole pattern roller bearing seat. Compared with the prior art, the roller hot rolling machine has the beneficial effects that the production efficiency can be improved, and raw materials can be saved.

Description

A kind of roller hot-rolling mill and concave roll

Technical field

The present invention relates to bearing manufacturing technology field, be specifically related to a kind of hot-rolling mill of processing roller bearing, also relate to the concave roll being used on this hot-rolling mill.

Background technology

Roller bearing is series very common in bearing, mainly be divided into cylindrical roller, spherical roller and taper roller, these rollers are mainly to adopt lathe turning processing method or forcing press upsetting pressure processing method in processing, in the different roller process of processing, these two class methods respectively have pluses and minuses:

One, the processing of cylindrical roller

1. adopt lathe turning process as follows: cylindrical bar is pressed to roller diameter size car external diameter and cut off bar by roller length size.The problem of this car system processing is:

(1) production efficiency is low.For example, diameter

the cylindrical roller of length 24mm, 550 left and right of 8 hours car systems of the every order of classes or grades at school of chassis bed processing, average per hour can only 68 left and right of car system.

(2) waste material.When car roller length processed cuts off bar, the minimum 4mm of cutting knife width, as calculated, car becomes each roller of volume of iron filings just to slattern 1.96cm ³, 15.3 grams of weight, car

cylindrical roller materials minimum diameter is

2. adopt forcing press upsetting pressure processing, that is: design the hot upsetting pressure mould of a set of cylindrical roller, comprise each one of loose tool, material pushing needle and drift, be arranged on forcing press, putting into loose tool after the material section heating cutting, with forcing press upsetting pressure moulding.The problem of this upsetting pressure processing is:

(1) waste material.Because while making cylinder loose tool pass, in order to ensure that material pushing needle can eject roller come smoothly, prevent that roller outer diameter is scratched, cylinder loose tool hole must be made into up big and down small conical loose tool hole (claiming again pattern draft), and the coning angle in conical loose tool hole is generally 1 ° of left and right.In the processing afterwards of large area of bed, grind off and just can become cylindrical roller, the metal that roller major part is worn away is exactly the material of wasting in a roller process.For example: diameter

the cylindrical roller blank of length 24mm, end diameter

outside diameter length 25mm(is normal, and blank dimension is

as calculated, a roller is wasted 1.8 grams of materials.

(2) production efficiency is low.For example, diameter

the roller of length 24mm, 6500 left and right of the every order of classes or grades at school of forcing press upsetting pressure in 8 hours, average per hour can only 810 left and right of upsetting pressure.

Two, the processing of spherical roller

1. with engine lathe turning processing.That is: round bar is pressed to spherical roller diameter dimension car spherical diameter and cut off bar by roller length size.The problem of this turning processing is:

(1) production efficiency is low.For example 22320CA spherical roller diameter is

length 28.5mm, 8 hours processing 500 left and right of quantity of the every order of classes or grades at school of a chassis bed, 62 left and right of average car system per hour.

(2) waste material.Turning roller length, cuts off when bar, and the thinnest 4mm of cutting knife width is lathed the volume of iron filings, and each roller just slatterns 2.83cm ³, approximately 22 grams of weight, turning roller materials diameter minimum is

2. with forcing press upsetting pressure processing.That is: designing the hot upsetting pressure mould of a set of spherical roller (comprising each one of upper and lower loose tool and upper and lower material pushing needle) is arranged on forcing press.Putting into loose tool after the material section heating cutting, with forcing press upsetting pressure moulding.The problem of this upsetting pressure moulding is:

(1) waste material.Forcing press, in the process of upsetting pressure moulding, in order to ensure that sphere rolls both ends of the surface and can reach process, must have in roller middle upsetting pressure endless belt to produce.Upsetting pressure endless belt is excess metal, need to grind off.The design thickness 2.5mm of normal upsetting pressure endless belt, upsetting pressure endless belt maximum gauge

endless belt diameter of bore

the volume of each roller upsetting pressure endless belt is 0.8125cm ³, 6.3 grams of weight.

(2) production efficiency is low.The subnormal upsetting pressure 22320CA of a forcing press per tour spherical roller quantity is 7500 left and right, average 930 left and right per hour.

Three, the processing of taper roller

1. with the processing of lathe turning method, that is: round bar is pressed to roller concentric reducer diameter process car external diameter, cut off bar by roller length size.The problem of this turning processing is:

(1) production efficiency is low.For example: 22230 class taper roller outside diameters

length 56mm, the taper roller that semi-cone angle is 2 °, the every order of classes or grades at school of a chassis bed 8 hours, processing quantity is 500 left and right, average 62 left and right per hour.

(2) waste material.When turning roller length cuts off charge bar, the thinnest 4mm of cutting knife width, the volume that is lathed iron filings just slatterns 3.22cm ³, weight is 25.1 grams, turning roller materials diameter minimum is

2. with forcing press upsetting pressure processing, that is: design the hot upsetting pressure mould of a set of taper roller, comprise lower loose tool, each one of material pushing needle and upper punch, be arranged on forcing press, putting into loose tool after the material section heating cutting, with forcing press upsetting pressure moulding.The problem of this upsetting pressure moulding is:

(1) waste material.Forcing press is in the process of upsetting pressure moulding, and in order to ensure that taper roller small end can be full of, reach technological requirement size in loose tool, inevitable have upsetting pressure endless belt to produce at the large end of taper roller, and upsetting pressure endless belt is excess metal, need to grind off.The design thickness of normal upsetting pressure endless belt is 2.5mm, the maximum outside diameter of upsetting pressure endless belt

endless belt internal diameter is

the volume of each roller upsetting pressure endless belt is 1.13cm ³, weight is 8.8 grams.

(2) production efficiency is low.7500 left and right of an every order of classes or grades at school of forcing press normal upsetting pressure moulding in 8 hours, average 930 left and right per hour.

Can know from above, at present, the processing method of cylindrical roller, spherical roller, taper roller blank, there is waste raw material and the low problem of production efficiency, this two large problems is perplexing roller processing enterprise always, good multiple enterprises is all attempting to find the new way that blank roller is processed, but never reaches breakthrough.

Summary of the invention

The present invention proposes a kind of roller hot-rolling mill, has solved the problem that in prior art, roller bearing wastes raw material in processing, production efficiency is low, has introduced the concave roll being used on this hot-rolling mill simultaneously.

Technical scheme of the present invention is achieved in that

A kind of concave roll, comprises roll body, and roll body sidewall is provided with spiral helicine fin, and adjacent two fins and roll body outer wall form roll pass, and fin one side is provided with stock chest.

The helical angle a of described spiral helicine fin is 0～1170 °, and along with the increase of helical angle a, the pitch of fin reduces gradually.

The height h of fin is along with the helical angle a of fin changes in the following manner:

In the time that a belongs to 0～90 ° and 360～450 °, h=D/2, the maximum gauge that wherein D is roller to be processed;

In the time of a=315 °,

In the time that a belongs to 315～360 °,

In the time of a=810 °, $h=(\frac{1}{4}~\frac{3}{8})D;$

In the time of a=1170 °, h=2～4mm;

In the time that a belongs to 90～315 ° or 450～810 ° or 810～1170 °, fin height h is along with the helical angle a of fin is respectively linear change.

The pitch t of fin is along with the helical angle a of fin presents five kinds of linear change, and these five sections are respectively 0-810 °, 810-900 °, 900-990 °, 990-1080 °, 1080-1170 °, and pitch t calculates in the following manner

ta=t ₀－4（△b _a－△b _a-90）

t ₉₀₀=t－4（△b ₉₀₀－△b ₈₁₀）

t ₉₉₀=t ₀－4（△b ₉₉₀－△b ₉₀₀）

t ₁₀₈₀=t ₀－4（△b ₁₀₈₀－△b ₉₉₀）

t ₁₁₇₀=t ₀－4（△b ₁₁₇₀－△b ₁₀₈₀）

Wherein, t ₀for basic screw-pitch,

△ b ₁₁₇₀=V _{total 1170}-V _{total 810}

△ b ₁₀₈₀=V _{total 1080}-V _{total 810}

△ b ₉₉₀=V _{total 990}-V _{total 810}

△ b ₉₀₀=V _{total 900}-V _{total 810}

And V _{total 1170}=2V ₁₁₇₀+ Va ₁₁₇₀; V _{total 1080}=2V ₁₀₈₀+ Va ₁₀₈₀; V _{total 990}=2V ₉₉₀₊va ₉₉₀; V _{total 900}=2V ₉₀₀+ Va ₉₀₀; V _{total 810}=2V ₈₁₀+ Va ₈₁₀

Wherein, ${\mathrm{Va}}_{1170}=\frac{\mathrm{\&pi;}}{4}{{\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="HDA0000478053350000052.png,HDA0000478053350000061.png"\; state="\{\{state\}\}">D</figure-callout>}}_1}^2\&CenterDot;{\mathrm{<figure-callout\; id="1170"\; label="b"\; filenames="HDA0000478053350000051.png"\; state="\{\{state\}\}">b</figure-callout>}}_{1170};{\mathrm{Va}}_{1080}=\frac{\mathrm{\&pi;}}{4}{{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="HDA0000478053350000011.png"\; state="\{\{state\}\}">D</figure-callout>}}_2}^2\&CenterDot;{\mathrm{<figure-callout\; id="1080"\; label="b"\; filenames="HDA0000478053350000051.png"\; state="\{\{state\}\}">b</figure-callout>}}_{1080};{\mathrm{<figure-callout\; id="990"\; label="Va"\; filenames="HDA0000478053350000051.png"\; state="\{\{state\}\}">Va</figure-callout>}}_{990}=\frac{\mathrm{\&pi;}}{4}{D_3}^2\&CenterDot;{\mathrm{<figure-callout\; id="990"\; label="b"\; filenames="HDA0000478053350000051.png"\; state="\{\{state\}\}">b</figure-callout>}}_{990}$ ${\mathrm{<figure-callout\; id="900"\; label="Va"\; filenames="HDA0000478053350000051.png"\; state="\{\{state\}\}">Va</figure-callout>}}_{900}=\frac{\mathrm{\&pi;}}{4}{{\mathrm{<figure-callout\; id="4"\; label="D"\; filenames="HDA0000478053350000021.png,HDA0000478053350000081.png"\; state="\{\{state\}\}">D</figure-callout>}}_4}^2\&CenterDot;{\mathrm{<figure-callout\; id="900"\; label="b"\; filenames="HDA0000478053350000051.png"\; state="\{\{state\}\}">b</figure-callout>}}_{900};{\mathrm{Va}}_{810}=\frac{\mathrm{\&pi;}}{4}{{\mathrm{<figure-callout\; id="5"\; label="D"\; filenames="HDA0000478053350000011.png"\; state="\{\{state\}\}">D</figure-callout>}}_5}^2\&CenterDot;{\mathrm{<figure-callout\; id="810"\; label="b"\; filenames="HDA0000478053350000051.png"\; state="\{\{state\}\}">b</figure-callout>}}_{810}$

D ₁, D ₂, D ₃, D ₄, D ₅, connection neck diameter while representing 1170 °, 1080 °, 990 °, 900 ° and 810 ° respectively, D _i=D-2h _i, h _iin the time of i=a, the height of fin 11-2; b _ithe length that connects neck in the time of i=a; V _iwhile being i=a, connect the volume of neck.

A kind of roller hot-rolling mill, comprise drive unit and body, body feeding end one side is provided with belt material wheel and heating furnace, the discharge end of body is provided with material road, drive unit drives two universal joint drivers to rotate, two universal joint drivers are connected with the main shaft of cylindricality roll, the main shaft of concave roll respectively, and cylindricality roll is arranged on body by cylindricality roll chock, and concave roll is arranged on body by concave roll bearing block.

Between described cylindricality roll and concave roll, be provided with upper guide plate, bottom guide.

Described heating furnace is four intermediate-frequency heating furnaces that are arranged in order.

The present invention can replace lathe car blank roller processed and upsetting pressure moulding blank roller.Hot-rolling mill of the present invention is to utilize existing milling train by changing roller roll and the operation adjustment to milling train necessity.Roll out cylindrical roller blank, spherical roller blank and taper roller blank.Compared with prior art, the present invention has following effect:

1. enhance productivity: the present invention is that the rotation on milling train realizes by roller roll, roller roll often rotates a circle, just bearing roller of rolling, milling train by Motor Drive by decelerator and frequency control, its working (machining) efficiency is apparently higher than turning processing and forcing press upsetting pressure processing, production efficiency of the present invention is 54.5 times of car roller processed, is four times of upsetting pressure roller.

2. save raw material: in order to ensure the quality of hot rolling roller end face, in the present invention, the design shape of hot rolling roller end face is conical, and the present invention only wastes a part of raw material after taper shape, save raw material than turning processing and forcing press upsetting pressure processing.

Brief description of the drawings

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the structural representation of roller hot-rolling mill in the present invention.

Fig. 2 is upper guide plate and bottom guide arrangement states schematic diagram.

Fig. 3 is cylindrical roller processing concave roll structural representation.

Fig. 4 is spherical roller processing concave roll structural representation.

Fig. 5 is taper roller processing concave roll structural representation.

Fig. 6 is concave roll machining state schematic diagram.

Fig. 7 is that fin height changes schematic diagram with spiral angle.

Fig. 8 is that pass cutting pitch changes schematic diagram with helical angle.

Fig. 9 is cylindrical roller flow process chart.

Figure 10 is cylindrical roller roll pass profile.

Figure 11 is spherical roller flow process chart.

Figure 12 is spherical roller roll pass profile.

Figure 13 is taper roller machining sketch chart.

Figure 14 is taper roller roll pass cutaway view.

Figure 15 is roll pass end stereometer nomogram.

Wherein: 1. steel material, 2. belt material wheel, 3. cylindricality roll chock, 4. cylindricality roll, 5. body, 6. Cardan shaft, 7. decelerator, 8. motor, 9. heating furnace, 10. concave roll bearing block, 11. concave rolls, 11-1. roll body, 11-2. fin, 11-3. roll pass, 11-4. stock chest, 12. rollers to be processed, 13.Liao road, 14. hoppers, 15. upper guide plates, 16. bottom guides, 17. connect neck.

Detailed description of the invention

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not paying the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.

As shown in Figure 1, a kind of roller hot-rolling mill, comprise drive unit and body 5, body 5 feeding end one sides are provided with belt material wheel 2 and heating furnace 9, the discharge end of body 5 is provided with material road 13, and drive unit drives two universal joint drivers 6 to rotate, and two universal joint drivers 6 are connected with the main shaft of cylindricality roll 4, the main shaft of concave roll 11 respectively, cylindricality roll 4 is arranged on body 5 by cylindricality roll chock 3, and concave roll 11 is arranged on body 5 by concave roll bearing block 10.Described heating furnace 9 is preferably four intermediate-frequency heating furnaces that are arranged in order.

The hot press course of work of the present invention is as follows: motor 8 drives decelerator 7 to move, and makes cylindricality roll 4 and concave roll 11 rotation clockwise by two Cardan shafts 6.Cylindricality roll 4 and concave roll 11 are fixed on body 5 by cylindricality roll chock 3 and the concave roll bearing block 10 of axle head respectively, make cylindricality roll 4 and concave roll 11 can only rotate, can not move, belt material wheel 2 rotates under driven by motor, drive 1 rotation of steel material to travel forward, steel material 1 is by after 4 heating furnaces 9, temperature is increased to 850 DEG C～1000 DEG C, enter in the gap of adjusting between cylindricality roll 4 and concave roll 11, the spirality fin of concave roll 11 is bitten steel material 1, and in rotation, steel material advances in tow.

As preferably, as shown in Figure 2, between described cylindricality roll 4 and concave roll 11, be provided with upper guide plate 15, bottom guide 16.Upper guide plate 15 and bottom guide 16 are limited in steel material 1 on certain level position, make steel material 1 play up and down.The spirality fin of pass pressure roller 11 is more and more higher, steel material 1 is cut into interconnected material section gradually, material section is rolled into gradually the shape the same with pass in roll pass, finally between material section, junction is cut off the roller 12 becoming in hot rolling by fin, in roller Zai Diaoliao road 13, flow to afterwards 14 li of hoppers.

As shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, described concave roll 11 comprises roll body 11-1, and roll body 11-1 sidewall is provided with spiral helicine fin 11-2, and adjacent two fin 11-2 and roll body outer wall form roll pass 11-3, and fin 11-2 mono-side is provided with stock chest 11-4.The helical angle a of described spiral helicine fin 11-2 is 0～1170 °, and along with the increase of helical angle a, the pitch of fin 11-2 reduces gradually.Described fin 11-2 refers to the part of spiral salient, and roll pass 11-3 is semi-open part between type groove and fin, and wherein the helical angle a of helical rib from right to left the number of degrees increase progressively to mark, be that roll pass 11-3 outlet is 0 °, 1/4 circle is 90 °, half-turn is 180 °, and a circle is that 360 ° of grades are calculated down successively.The roll pass of roll is divided into shaping area and Runout area, and the effect of shaping area is nip bar extrusion modling, and the position of shaping area is feedstock direction first lap, i.e. the last lap at pass α angle, and the effect of Runout area is finishing roller and cuts off front and back connection neck.That is to say helical angle a from 810 °～1170 ° be shaping area, other parts are Runout areas.

When the dissimilar bearing roller of rolling, only need to change different pass pressure rollers just passable, as Fig. 9～13, cylindrical roller, spherical roller, taper roller and corresponding pressure roller pass are provided respectively, be processed as example with cylindrical roller, as shown in Figures 9 and 10, adopt the roll pass described in Figure 10, can process the cylindrical roller blank obtaining as described in left side in Fig. 9, fine finishining afterwards can obtain the forming cylinder roller as shown in Fig. 9 right side.In like manner, spherical roller is processed as shown in FIG. 11 and 12, and taper roller is processed as shown in Figure 13 and Figure 14.

As preferably, the height h of fin 11-2 is along with the helical angle a of fin 11-2 changes in the following manner:

In the time that a belongs to 0～90 ° and 360～450 °, h=D/2, the maximum gauge that wherein D is roller to be processed;

In the time of a=315 °,

In the time that a belongs to 315～360 °,

In the time of a=810 °, $h=(\frac{1}{4}~\frac{3}{8})D;$

In the time of a=1170 °, h=2～4mm;

In the time that a belongs to 90～315 ° or 450～810 ° or 810～1170 °, fin height h is along with the helical angle a of fin is respectively linear change, and described linear change is the linear change form that is similar to y=kx+b in how much.In the time knowing roller diameter D to be processed, fin height can obtain respectively a=90 °, 315 °, 810 °, 1170 ° time, also just know any two points on straight line, and then by linear change formula, can know a height h of fin when arbitrary place between 0～1170 °.

As shown in 7, represent that fin height h is with pitch angle alpha will angle change curve.Be angled straight lines section from 1170 ° to 810 °, represent that this section of fin height changes with even angle straight line, expect also that in order to sting roll compacting gradually connects neck.Also be angled straight lines section from 810 ° to 450 °, but gradient slow down, in order to discharge unnecessary metal after roller moulding.Be parallel angle coordinate straight line from 450 ° to 360 °, represent that this section of fin height is constant, be one section of regular circular arc on roll, be subject to grinding in order to 450 ° of points before ensureing in the course of the work, highly reduce after, still can cut off rear connection neck, until after put 360 ° of wearing and tearing.Fin, till 360 ° of certain angles to 315 ° of locating vertically to decline, forms a decline step, with so that connect neck and pass through, then proceeds to and cuts front connection neck and turning stock chest circular arc advance and retreat cutter is used.From 315 ° to 90 °, from the fin of 90 ° to 0 ° to from 810 ° to 450 °, from 450 ° to 360 ° effect similar, object be cut off before connect neck.

In the application, the basic parameter of roll pass design is as follows:

1. roller diameter D _bcan after mainly be nipped according to bar, rotate and determine, generally select DB=5-12D, wherein D be roller diameter.Roller diameter is large, and bar easily rotates, and also can improve roll campaign.

2. pass total length

Total helical angle of general pass is 1080 °～1170 °, wherein 360 ° of the moulding heads of district, 720～810 ° of the finishing heads of district.Pass total length is long, increases the loose danger of roller centre, and pass total length is too short, causes roll fin roll-force excessive, and quick abrasion reduces service life.In the time being in above-mentioned scope, can reach a kind of poised state.

3. bar diameter

Bar diameter is equal to or slightly less than roller maximum outside diameter, and the former is applicable to small roller, and the latter is applicable to large roller (general little 0.1～0.2 millimeter).

4. moulding at the end connects neck diameter d _become

D _becomethat selects is larger, and waste metal is more, d _becomethat selects is less, calculates roll fin width narrower, insufficient strength.General selection

relatively be conducive to processing

Wherein, d is roller diameter at butt end.

5. basic fin width a ₀

When 0 °～90 °, roll, the width of fin end face, is called basic fin width a ₀, a ₀that gets is little, affects fin intensity, and meanwhile, the stock chest on fin can not reach the size needing, a ₀that gets is large, can cause and connect neck hollow or loose, and severe patient can extend to roller end, a ₀choose according to the form below

Table one

Roller diameter at butt end	16——20	21——30	31——40	41——50
					Basic fin width	6——9	8——12	10——14	13——16

6. fin starting altitude h0

Fin starting altitude h0 chooses according to the form below

Table two

Roller diameter at butt end	16——20	21——30	31——40	41——50
					Fin starting altitude	1.5——2	2——3	2.5——3.5	3——4

7. at the end fin height h of moulding _become=D

H is at 0 °～90 °, 360 °～450 °, and fin height should equal 1/2nd of roller diameter under hot-rolled state.

8. the end face cone angle beta of roll pass

β value obtains less, and metal folding more easily appears in roller end face, and β value obtains larger, and waste material is more, lower operation processing time consuming, and β is worth choosing according to the form below:

Table three

Roller diameter	≦22	24～50
			End face cone angle	7°	5°

9. Roller Design step

9.1 determine roll technology parameter

According to roller product, figure determines blank roller dimension, roll pass size while determining hot rolling according to blank roller dimension.

9.2 calculate the each section of oblique line amount of crossing feed

Fin starting altitude h0, moulding fin height h at the end _becomefin height h during with 450 ° ₄₅₀after determining, the amount of crossing feed of each section of oblique line is calculated as follows:

The shaping area amount of crossing feed P one-tenth=360(h _become-h0)/α _become-α ₀

450-α _becomethe amount of crossing feed P whole=360(h ₄₅₀-h _become)/α _become-450

The amount of crossing feed of other section all can be calculated by this formula, just fin height and some variation of angle.

9.3 do fin height change table and curve map

1. Runout area fin height change table

H540=h450-P is whole/and 4

H630=h450-P is whole/and 2

H720=h450-3P is whole/and 4

2. shaping area fin height change table

H900=h450-h one-tenth-P becomes/4

H990=h450-h one-tenth-P becomes/2

H1080=h450-h one-tenth-3P becomes/4

Can directly list fin height change table and fin height change curve according to fin height change value.

9.4 make fin wide variety table

According to fin basic width a ₀, roll pass end face cone angle beta and fin height can be calculated as follows the fin width of each angle:

Ai=a ₀+ 2(h is whole-hi) and tan β

Ai value is listed to fin wide variety table, and this is the original width of fin.

9.5 calculate shaping area pass conversion pitch and fin width

Roller is followed a volume principle of invariance in the time of the rolling of shaping area, that is: the metal volume comprising at any angle bottom roll pass be connected the long-pending sum of neck body and all equate.If unequal, can cause rolled piece malrotation, can't cut connection neck, if keep roller constancy of volume in the rolling of shaping area, the fin width that only changes, dwindles and connects the long-pending unique method that is only of neck body, fin width changes, and causes that pitch changes.As shown in figure 15, as preferably, the pitch t of fin 11-2 is along with the angle a of fin 11-2 presents five kinds of linear change, and these five sections are respectively 0-810 °, 810-900 °, 900-990 °, 990-1080 °, 1080-1170 °, and pitch t can calculate according to the following equation:

ta=t0－4（△ba－△ba-90）

t900=t－4（△b900－△b810）

t990=t0－4（△b990－△b900）

t1080=t0－4（△b1080－△b990）

t1170=t0－4（△b1170－△b1080）

Wherein, t0 is basic screw-pitch,

The total 1170-V of △ b1170=V total 810

The total 1080-V of △ b1080=V total 810

The total 990-V of △ b990=V total 810

The total 900-V of △ b900=V total 810

And the total 1170=2V1170+Va1170 of V;

The total 1080=2V1080+Va1080 of V;

The total 990=2V990+Va990 of V;

The total 900=2V900+Va900 of V;

The total 810=2V810+Va810 of V

Wherein, Va1170=D1 ²b1170;

Va1080=D2 ²·b1080；

Va990=D3 ²·b990

Va900=D4 ²·b900；

Va810=D5 ²·b810

D1, D2, D3, D4, D5, connection neck diameter while representing 1170 °, 1080 °, 990 °, 900 ° and 810 ° respectively, Di=D-2hi, hi is in the time of i=a, the height of fin 11-2; Bi is the length that connects neck in the time of i=a; Vi is that i=a is the volume that connects neck.In Figure 15, k is the height of pass end-cone part, and c is the height of pass end billiard table, and R is the radius of pass end circular arc.

9.6 stock chest radius calculation

Under the each angle in shaping area, metal volume is constant ensures with converting cutting pitch change fin width, as shown in Figure 8, behind Runout area, along with the continuation of fin height raises, pass metal volume continues to dwindle, and still has unnecessary metal, for this part excess metal being discharged, must go out one section of arc groove at Runout area fin one sidecar, excess metal is got rid of in arc groove, this arc groove is called stock chest.

Stock chest radius is r, and the sphere volume half of order taking r as radius equals the volume that moulding at the end connects neck 17:

V ball/2=V becomes

2 π r ³/ 3=π d ²become a to become/4

R= ³√ 3d ²become a to become/8

Add man-hour, r value should be slightly larger than calculated value.

From Fig. 9, Figure 11 and Figure 13, find out that the end face of three kinds of blank rollers and the end face of roll pass have a α angle, this does not occur that for ensureing blank roller end face rolling defect must have.Must be able to bite steel material and make steel material be rolled into gradually bearing roller at the fin height of rolling work mesothyrid roll, the fin height of concave roll must be shorter in the time biting steel material, fin height is higher more backward, and final, fin height equals bearing roller radius.It is spiral yarn shaped that fin becomes, and due to the existence of pitch angle alpha will and the variation of fin height, makes fin end face width reduce and become more and more wider with fin height.Fin height is equaled to radius of roller, and that when roller is about to drop out in roll, is referred to as the point at 0 ° of angle.Fin is the point at 360 ° of angles along the roll circumference spiral point of a week, and fin when spiral escalation to 1170 ° angle, is exactly that fin height is minimum successively, the point that width is the widest, the starting point that starts to bite steel material while being also work.According to blank roller length computation out, 1170 ° of the angles that fin rises are to draw according to the experience of rolling steel ball blank and field trial to the pitch of fin spiral escalation.

Roller roll pass length is to determine according to the product of finished product roller length+allowance+end slope angle tan value and depth of groove:

L+Δ1=l+δ+tan(d+δ1)，

Wherein δ value can be according to using steel material quality condition to determine, β value determines according to finished product roller diameter is big or small, generally, roller diameter≤22 o'clock, β value is got 7 °-8 °, and when roller diameter > 22, β value is got 5 °-6 °.

810 °～1170 ° roll pass designs refer to from 810 °～1170 ° interval original widths that change fin, ensure that the metal volume that roll pass can contain all equates in the time of 90 °.The ball stage body of just two ends that volume energy changes amasss and frustum of a cone volume, middle column part volume does not change, so only calculate the poor of the long-pending and frustum of a cone volume of ball stage body under the each angle in both ends, the original width of change fin that just can be correct.

In the present invention, could be on milling train after steel material is heated to 850 DEG C-1000 DEG C rolling roller, therefore roll material should be heat resisting steel manufacture, the roll temper number of quenching requires HRC51～53, in order to improve roll working life, the tempering of quenching need be passed through nitrogen treatment.

The all lengths unit relating in the application is mm.

The present invention can replace lathe car blank roller processed and upsetting pressure moulding blank roller, rolls out cylindrical roller blank, spherical roller blank and taper roller blank, is the new method of current bearing roller blank processing.Manufacturing and designing concave roll is the key of technology, and bearing roller roll is the main tool of mill milling bearing roller, and the shape of roll pass has determined the shape of bearing roller.

Compared with prior art, the present invention has following benefit:

1. enhance productivity

In the present invention, pass pressure roller often rotates a circle, just bearing roller of rolling, and milling train, is made roller roll turn-100 speed that turn with per minute 70 and rotates by decelerator and frequency control by Motor Drive.Roller roll calculates by per minute 70 rotating speeds that turn, per hour can 4000 left and right of rolling bearing roller.Every order of classes or grades at school 8 hours, can 30000-33000 left and right of rolling.By 30000 and car roller processed and the comparison of upsetting pressure roller, in shown in table four:

Table four

As can be seen here, the production efficiency of hot rolling roller is 54.5 times of car roller processed, is four times of upsetting pressure roller.

2. save raw material

In order to ensure the quality of hot rolling roller end face, it is conical that the design shape of hot rolling roller end face is, and this is hot rolling roller waste raw material parts.

1.13 grams of weight.

Save 15.3 grams-1.13 grams=14.17 grams of raw material than car roller processed

Save 1.8 grams-1.13 grams=0.67 gram of raw material than upsetting pressure roller

2.03 grams of weight

Save raw material than car roller processed: 22 grams-2.03 grams=19.97 grams

Save raw material than upsetting pressure roller: 8.8 grams-2.03 grams=4.27 grams

2.3 hot rolling taper roller waste raw material (taking 22230 taper rollers as example):

Conical volume: the 0.262d1 of end face ²l1+0.262d2 ²l2

＝0.262×24.59 ²×1.27＋0.262×21.3 ²×1.28

＝0.35cm ³

2.73 grams of weight

Save raw material than car roller processed: 25.1 grams-2.73 grams=22.37 grams

Save raw material than upsetting pressure roller: 8.8 grams-2.73 grams=6.07 grams

The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (7)

1. a concave roll, comprise roll body (11-1), roll body (11-1) sidewall is provided with spiral helicine fin (11-2), and adjacent two fins (11-2) form roll pass (11-3) with roll body outer wall, and fin (11-2) side is provided with stock chest (11-4).

2. concave roll according to claim 1, is characterized in that: the helical angle a of described spiral helicine fin (11-2) is 0～1170 °, and along with the increase of helical angle a, the pitch of fin (11-2) reduces gradually.

3. concave roll according to claim 2, is characterized in that: the height h of fin (11-2) is along with the helical angle a of fin (11-2) changes in the following manner:

In the time that a belongs to 0～90 ° and 360～450 °, h=D/2, the maximum gauge that wherein D is roller to be processed;

In the time of a=315 °,

In the time that a belongs to 315～360 °,

In the time of a=810 °, $h=(\frac{1}{4}~\frac{3}{8})D;$

In the time of a=1170 °, h=2～4mm;

In the time that a belongs to 90～315 ° or 450～810 ° or 810～1170 °, fin height h is along with the helical angle a of fin is respectively linear change.

4. concave roll according to claim 3, it is characterized in that: the pitch t of fin (11-2) is along with the helical angle a of fin (11-2) presents five kinds of linear change, these five sections are respectively 0-810 °, 810-900 °, 900-990 °, 990-1080 °, 1080-1170 °, and pitch t calculates in the following manner

ta=t ₀－4（△b _a－△b _a-90）

t ₉₀₀=t－4（△b ₉₀₀－△b ₈₁₀）

t ₉₉₀=t ₀－4（△b ₉₉₀－△b ₉₀₀）

t ₁₀₈₀=t ₀－4（△b ₁₀₈₀－△b ₉₉₀）

t ₁₁₇₀=t ₀－4（△b ₁₁₇₀－△b ₁₀₈₀）

Wherein, t ₀for basic screw-pitch,

△ b ₁₁₇₀=V _{total 1170}-V _{total 810}

△ b ₁₀₈₀=V _{total 1080}-V _{total 810}

△ b ₉₉₀=V _{total 990}-V _{total 810}

△ b ₉₀₀=V _{total 900}-V _{total 810}

And V _{total 1170}=2V ₁₁₇₀+ Va ₁₁₇₀; V _{total 1080}=2V ₁₀₈₀+ Va ₁₀₈₀; V _{total 990}=2V ₉₉₀+ Va ₉₉₀; V _{total 900}=2V ₉₀₀+ Va ₉₀₀; V _{total 810}=2V ₈₁₀+ Va ₈₁₀

Wherein, ${\mathrm{Va}}_{1170}=\frac{\mathrm{\&pi;}}{4}{D_1}^2\&CenterDot;b_{1170};{\mathrm{Va}}_{1080}=\frac{\mathrm{\&pi;}}{4}{D_2}^2\&CenterDot;b_{1080};{\mathrm{Va}}_{990}=\frac{\mathrm{\&pi;}}{4}{D_3}^2\&CenterDot;b_{990}$ ${\mathrm{Va}}_{900}=\frac{\mathrm{\&pi;}}{4}{D_4}^2\&CenterDot;b_{900};{\mathrm{Va}}_{810}=\frac{\mathrm{\&pi;}}{4}{D_5}^2\&CenterDot;b_{810}$

D ₁, D ₂, D ₃, D ₄, D ₅, connection neck diameter while representing 1170 °, 1080 °, 990 °, 900 ° and 810 ° respectively, D °=D-2h °, h ° is in the time of i=a, the height of fin (11-2); b _ithe length that connects neck in the time of i=a; V _iwhile being i=a, connect the volume of neck.

5. a roller hot-rolling mill, comprise drive unit and body (5), body (5) feeding end one side is provided with belt material wheel (2) and heating furnace (9), the discharge end of body (5) is provided with material road (13), it is characterized in that: drive unit drives two universal joint drivers (6) to rotate, two universal joint drivers (6) respectively with the main shaft of cylindricality roll (4), the main shaft of concave roll (11) is connected, cylindricality roll (4) is arranged on body (5) by cylindricality roll chock (3), concave roll (11) is arranged on body (5) by concave roll bearing block (10), described pass pressure roller (11) is as shown in claim 1～4.

6. roller hot-rolling mill according to claim 5, is characterized in that: between described cylindricality roll (4) and concave roll (11), be provided with upper guide plate (15), bottom guide (16).

7. roller hot-rolling mill according to claim 6, is characterized in that: four intermediate-frequency heating furnaces of described heating furnace (9) for being arranged in order.

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