CN86102935A - Cutting tool and manufacture method thereof and equipment - Google Patents

Abstract

Mining has steel body 60 and is surrounded the outstanding cutting point of a knife of clamping 62 by head 68 through forging compressive strain with cutting tool.The mechanical crank of making this cutter is forged press has top hammer body 10 with patrix 12, counterdie 14 to be contained on the annular piston 24 in the hydraulic cylinder 26.Dress drift piston 28 extends up through ring-type dress mould piston 24, and the drift 30 of its upper end dress stretches in the die cavity of counterdie 14.The top hammer body moves downward and makes the upper and lower mould contact, forces dress mould piston 24 to move in hydraulic cylinder 26, promotes dress drift piston 28 and moves upward, and squeezes in the closed die cavity thereby drift 30 is upwards forged pressure.

Description

Cutting tool and manufacture method thereof and equipment

The invention relates to a kind of cutting tool that is used for mining industry.Most of such cutters are installed on the rotatable cylindric excavation panel surface, are generally radially outstanding part, so that incision rock or coal seam.The present invention also comprises equipment and the method for making this cutting tool.This equipment is that a kind of mechanical crank is forged press, and the top hammer body on it is driven and can periodically be moved back and forth above base by crank.

Traditional cutting tool is that a columniform machining steel is forged part, and its end has a shrinkage pool, is used for fixing the cutting point of a knife, and cutting point of a knife usually is the tungsten carbide point of a knife.Bore in advance in the good bigger shrinkage pool by its soldering being gone into this steel body one end, it is fixed in the steel body.

Obviously, owing on the production stage, need the machining cylindrical steel to forge part at first, again in the boring of one end, and then cutting the point of a knife soldering in the hole.The cutting tool of said method manufacturing is the comparison costliness.

Forge traditional mechanical crank of making industrial use and forge press and have one to forge the pressure drift by what top hammer body band, drift is movable, forges downwards when beating at the top hammer body, and drift can cooperate in the mould of squeezing into base.

The press of forging so generally not be used on " no fire is forged and made ".Because, use this technology, airtight fully die cavity needs to control extremely closely the size and the temperature of workpiece on the mould seat, so cost is the comparison costliness.If this strict control do not accomplish, press fault or even the danger of breaking forging to hit to forge., if adopt the measures to reduce stresses of certain form to go to regulate potential overload pressure, resemble in BP 2107231, narrated the sort of and have the pressure controlled press of forging.This mechanical crank is forged press and just can be applied to not have fire and forge and make, and does not need the temperature and the size of strict control workpiece.But that narrates in above-mentioned patent forges the mould seat of splitting that has used a locking on the press.It can provide a complete airtight die cavity, and the potential overvoltage that has hydraulic regulating device to go to regulate to forge press.

Found that now mechanical crank forges press and also can be applicable to molded the forging of closed mold and make.Forge when beating, the motion of top hammer body can match with the new structure of mould, so that make pressure and be added on the workpiece in the mould forging.

The purpose of this invention provides a kind of improved cutting tool, makes improving one's methods of this cutter, and produces this cutter, and more perfect novel mechanical crank is forged press apparatus.

As a part of the present invention, it is a cutting tool of being made up of steel body and cutting point of a knife mounted thereto.The steel body blocks a part of cutting point of a knife tightly through distortion, clamps the cutting point of a knife that is installed on the above-mentioned steel body like this.The steel body is microscler, and the one end changes the part that shape removes to pack tightly this cutting point of a knife, cuts point of a knife like this and just comes out from a distal process of steel body.

The present invention also provides a kind of method of making this by steel body and the cutting tool formed of cutting point of a knife.This steel body and cutting point of a knife are placed in the mould seat of forging press, start and forge press, make the steel body deformability, and this point of a knife is securely fixed on the steel body.

The present invention also provides a kind of mechanical crank to forge press.This forges press has: the top hammer body, it by crank by reciprocally cycle movement of base; Mould seat, this mould seat have two punch forming modules up and down, are contained in respectively on top hammer body and the base; Forge the pressure drift, it links to each other with one of above-mentioned punch forming module, the drift die cavity of back and forth coming in and going out.This mould that links to each other with drift be contained in can be in hydraulic cylinder reciprocating holding on the mould piston, and this forge press drift be contained in can be in same hydraulic cylinder reciprocating holding on the drift piston.In the hydraulic cylinder, the area that holds the drift piston of liquid body effect holds the mould piston area less than what act on liquid.Therefore, forge that the top hammer body is towards the closing motion of base when beating, just making up and down, two moulds are in contact with one another closed die cavity.Hold of the inside motion of mould piston, force liquid to promote to hold the relative hydraulic cylinder of drift piston and move upward, then promote hydraulic punching head and pour closed die cavity hydraulic cylinder.

The proper mould piston that holds is a ring-type, and the above-mentioned drift piston that holds can axially pass this ring-type and holds the mould piston motion, airtight cooperation simultaneously.

The top hammer body is being forged when beating, and when two swaging dies up and down contact, hold the mould piston and move in hydraulic cylinder, holds the drift piston and just has been subjected to a hydraulic coupling.This adds to earlier and hold the drift piston, pass to hydraulic coupling on the workpiece then can't cause two swaging dies separately, because forge when beating at the top hammer body, it is the power of being transmitted between two mould contact surface, just produces and is added in hydraulic coupling on the drift.

It is a kind of with said method and the cutting tool of forging the press manufacturing that the present invention also provides.

Other characteristics more of the present invention will be illustrated separately in the narration below by the example reference accompanying drawing.

Fig. 1 is the sectional view of forging press that can be used for making cutting tool according to the present invention.

Fig. 2 is the side view of cutting tool constructed in accordance.

See Fig. 2 earlier, cutting tool constructed in accordance is made up of steel body 60 and the cutting point of a knife 62 that is fixed on the steel body 60.This cutting tool is suitable for as a kind of mining tool cutter, and its cutting point of a knife 62 is made by tungsten carbide.As shown in the figure, this cutting tool generally has a cylindrical bar 64, and it can be installed in from the radially outstanding place of the disc surfaces of rotation whereby.One end of this cylindrical bar 64 has a cylinder shaft shoulder 66 and is generally truncate coniform head 68.At head cutting point of a knife 62 is installed, cutting point of a knife 62 generally is columniform, is fixed in the head 68, and the cutting part of its point of a knife is axially outstanding from cutterhead.

According to the present invention, the steel material of cutter head 68 need change shape so that block cutting point of a knife 62, and it is fixed on tool head tightly.

See Fig. 1 now.Here represent that according to the present invention a kind of novel mechanical crank that is used for making aforementioned cutting tool is forged press.

The press of forging that Fig. 1 represents is that a mechanical crank is forged press.It has a crank-motion and drives, (on the figure expression) but the top hammer body 10 of up-and-down movement.Top hammer body 10 has the upper impression mould 12 that matches with the lower impressions mould 14 of mould seat, when these two swaging dies respectively so that up and down two planes 16 and 18 contact, just formed an airtight die cavity therebetween.

The lower impressions mould 14 of tool seat is contained on the seat ring of splitting 20.Seat ring 20 itself is fixed on the large-diameter annual piston 24 by dead ring 22, and piston 24 can move both vertically in the hydraulic cylinder 26 of hydraulic press base.

Annular piston 24 just holds the mould piston, and a central cylindrical cylinder is arranged, and with the form that is sealed and matched another reciprocating piston 28 is housed.This piston 28 can stretch out through the smaller diameter portion of cylinder, and its upper surface is equipped with to forge presses drift 30, upwards stretches in the lower impressions mould 14 of tool seat.

As shown in the figure, in the following annular surface of holding mould piston 24 with hold in the space 32 between the soffit of drift piston 28 and be full of liquid.Hole 34 is passed vertically upward and is held mould piston 28, but the liquid suction valve of a switch is arranged in the top.The space 38 of holding in the hydraulic cylinder above the mould piston 24 is full of air, and by air vent 40 discharged air.Similarly, hold in drift piston 28 upper spaces 42 and also fill into air, and can enter by gas port 44 discharged air or compressed air and hold mould piston 24, make its supercharging, to produce the recoil movement that holds drift piston 28 that to narrate in the back.Regulate the top closing cap 48 of bolt 46 extend past hydraulic cylinders 26, so that determine to hold the centre position of mould piston 24.

Above-mentioned centre position obtains like this: when two swaging dies 12 up and down of tool seat with when opening in 14 minutes, (just forge open beginning before) is by holding the gas port 44 of drift piston 28 surfaces, fill into compressed gas, compressed atmosphere compressing makes holds drift piston 28 and moves down, compressing liquid forces and holds mould piston 24 and move up and regulate bolt 46 up to running into.At this moment, forge and press drift to be positioned at the extreme lower position of lower impressions mould 14 die cavities, and workpiece, such as can pack into the die cavity openend of lower impressions mould 14 of cylindrical work.

Forging under the effect of beating, top hammer body 10 moves downward, the upper surface 18 that the soffit 16 of mold 12 can contact bed dies 14 and closed die cavity.Further moving downward of top hammer body 10 can move downward towards base by compressing bed die 14, like this, by seat ring 20 and dead ring 22, cause that holding mould piston 24 moves in hydraulic cylinder 26, force liquid to sink thus, thereby upwards promote to hold drift piston 28 with respect to holding mould piston 24.Make like this to forge and press drift 30 upwards to pour in the closed die cavity, will forge on the workpiece that pressure is applied to the inside.Drift 30 parts are movably represented on figure the position.

The gross area that the ring-type that acts on liquid is held mould piston 24 is far longer than the area that holds drift piston 28.Therefore the drift 30 that is moved downward by top hammer body 10 and produce is towards the motion of the workpiece motion greater than top hammer body itself; The motion of this drift 30 is proportional to and holds mould piston 24 and hold the poor of drift piston 28 gross area separately also faster than the motion of top hammer body, and this gross area is the area that piston contacts with liquid in fluid cylinder 26.From hold drift piston 28 transfer back to by liquid hold mould seat piston 24 power to increase with the top difference that similarly is proportional to the relevant piston gross area.Guarantee to have in forging the pressure process a high punch forming power like this, this does not forge the ability of making of forging press there being fire, is very important.

Forging and hit, is improved like this in the control of hydraulic cylinder internal pressure, and a reducing valve (reducing valve is expression in the drawings) promptly is set at through hole 50 places of hydraulic cylinder fluid space 32.

As shown in Figure 1, workpiece is normally columniform, forges when beating, and utilizes the die cavity by closure to make it become definite shape.Though not expression in detail in Fig. 1.In the present invention, press the punching press of drift 30 in die cavity by forging, workpiece promptly becomes cutting tool shape shown in Figure 2.Initial cylindrical work has a shrinkage pool in the top, with civilian dress cutter point 62.Forge when beating,, make workpiece form shape shown in Figure 2 by forging the punching press of pressing drift 30 in the die cavity.The steel body of shrinkage pool part encloses its distortion and clamps the lower end of inserting cutting point of a knife 62 within it, will cut thus in the shaping head 68 that point of a knife is securely fixed in cutting tool.

With reference to Fig. 1, the press of forging of narration here has one to be installed in and to forge forging that cylindrical fluid power drives on the press base and press drift 30., this installation is turned around also be fit to.At this moment, wholely hold mould piston 24, hold drift piston 28 and their hydraulic cylinder 26 can be installed near top hammer body 10, and a fixing bottom swaging die is contained on the base.A kind of structure like this is when forging the pressure cutting tool according to the present invention, its outstanding advantage is arranged, because in the fixing mould, cylindrical work only need be placed in the die cavity of bed die below cutting point of a knife 62 can be placed on, do not lay the cutting point of a knife and beat the type hole in advance at an end of workpiece and be not required to be.

Claims (8)

1, by the steel body be installed in the cutting tool that the cutting point of a knife on the steel body is formed, it is characterized in that: make the steel body deformability,, will cut point of a knife and tightly be fixed on this steel body so that clamp the part of cutting point of a knife.

2, according to the desired cutting tool of claim 1, it is characterized in that: the steel body is longilineal, and its end need change the part of shape to surround and to clamp above-mentioned cutting point of a knife, and point of a knife is protruded from this end of this steel body.

3, make the method for the cutting tool of forming by steel body and cutting point of a knife, it is characterized in that: steel body and bit point are all in forging the mould seat of press, start and forge the part that press makes the steel body deformability, clamps the cutting point of a knife in the steel body, this point of a knife tightly is fixed on this steel body.

4, cutting tool manufacture method, its principal character in front narration and with reference to the accompanying drawings in existing explanation.

5, a kind of cutting tool, its principal character in front narration and with reference to the accompanying drawings in existing explanation.

6, a kind of mechanical crank is forged press, it is characterized in that: it have one by crank drive on base can the oscillation cycle motion the top hammer body; One has the mould seat of two type cavity moulds up and down, and two type cavity moulds are installed in respectively on top hammer body and the base up and down; One link to each other with one of above-mentioned type cavity mould forge the pressure drift.The drift shape chamber of can back and forth coming in and going out, this mould that links to each other with drift be contained in can be in hydraulic cylinder reciprocating holding on the mould piston, and this forge press drift be contained in also can be in same hydraulic cylinder reciprocating holding on the drift piston, the area that holds the drift piston of liquid body effect holds the mould piston area less than what act on liquid in the hydraulic cylinder.Therefore, forge when beating, the top hammer body is towards the closing motion of base, just make up and down that two moulds are in contact with one another, closed die cavity, hold of the inside motion of mould piston to hydraulic cylinder, force liquid to sink to promoting to hold the relative hydraulic cylinder of drift piston and outwards move, thereby promote to forge the die cavity of pressing drift to pour closure.

7, according to the desired press of forging of claim 6, it is characterized in that: hold the form that the mould piston is a ring-type, can axially under air-tight state, pass this ring-type and hold the mould piston motion and hold the drift piston.

8, a kind of press of forging, its principal character in front narration and with reference to the accompanying drawings in existing explanation.

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