CN214394937U - Granulator hobbing cutter with wear resistance - Google Patents

Abstract

The application relates to the technical field of granulator hobs, in particular to a granulator hob with wear resistance, which comprises a hob shaft and a hob main body sleeved on the hob shaft, wherein a plurality of teeth are arranged on the hob main body in the circumferential direction, the tooth surfaces of the teeth are in threaded connection with a first positioning screw, blades are arranged on the teeth, a kidney-shaped hole is formed in each blade, a flared hole for a screw head of the first positioning screw to penetrate through is formed in one end of the kidney-shaped hole, and the radial size of a screw column of the first positioning screw is matched with the width of the kidney-shaped hole; the rotatable cover of the one end that the hob shaft is located the hobbing cutter main part is equipped with spacing fender dish, and spacing fender dish circumference is fixed with a plurality of spacing separation blades that are used for supporting the blade, and spacing separation blade deviates from flaring hole one side that corresponds the blade, reserves the interval that supplies the blade to pass between two adjacent spacing separation blades, is provided with the locating component who is used for fixing a position spacing fender dish on the hob shaft. This application has the effect that makes things convenient for operating personnel to take off the blade fast and polish or change, reduces the whole dismantlement of hobbing cutter main part.

Description

Granulator hobbing cutter with wear resistance

Technical Field

The application relates to the technical field of granulator hobbing cutters, in particular to a granulator hobbing cutter with wear resistance.

Background

With the vigorous development of the plastic rubber industry, the polyester production capacity is rapidly increased, and the use number of the polyester granulator is sharply increased. The cutting head of the granulator is the core of the whole granulator and mainly comprises a guide roller set, a fixed cutter, a movable cutter and other parts. The moving knife is a rotary hob with edge teeth, and the hob of the granulator is the key for the efficient use of the granulator.

In the correlation technique, the hobbing cutter of pelleter is mostly the integrative setting of sword tooth and hobbing cutter main part, and the easy emergence wearing and tearing of cutting edge long-time use, passivation need in time polish or change to the hobbing cutter of passivation.

To the above-mentioned correlation technique, the inventor thinks no matter the hobbing cutter to the cutting edge passivation polishes or changes, all need be by the whole hobbing cutter main part of dismantling on the pelleter, and the whole replacement cost of hobbing cutter is higher, and the hobbing cutter is whole to be dismantled and polish time-consuming and laboursome by the pelleter.

SUMMERY OF THE UTILITY MODEL

In order to reduce the whole needs of dismantling of hobbing cutter when polishing or changing to the cutting edge of hobbing cutter, this application provides a pelleter hobbing cutter with wear resistance.

The application provides a pelleter hobbing cutter with wear resistance adopts following technical scheme:

a granulator hob with wear resistance comprises a hob shaft and a hob main body sleeved on the hob shaft, wherein a plurality of teeth are circumferentially arranged on the hob main body, tooth surfaces of the teeth are in threaded connection with a first positioning screw, the teeth are provided with blades, waist-shaped holes are formed in the blades, one end of each waist-shaped hole is provided with a flared hole which is communicated with the waist-shaped hole and through which a screw head of the first positioning screw passes, and the radial size of a screw column of the first positioning screw is matched with the width of the waist-shaped hole;

the hob shaft is located the rotatable cover in one end of hob main part is equipped with spacing fender dish, spacing fender dish circumference is fixed with a plurality of subsides that are used for supporting the spacing separation blade of blade, and is a plurality of spacing separation blade and a plurality of the blade one-to-one, just spacing separation blade deviates from the correspondence the flaring hole one side of blade, adjacent two it has the confession to reserve between the spacing separation blade the interval that the blade passed, be provided with on the hob shaft and be used for the location the locating component of spacing fender dish.

By adopting the technical scheme, the blade is sleeved on the corresponding positioning screw I through the flaring hole, the blade is pushed along the extension direction of the waist-shaped hole, so that the positioning screw I is matched with the waist-shaped hole to limit the blade to be separated from the hob main body, the limiting blocking disc is sleeved on the hob shaft and enables the limiting blocking piece to abut against the corresponding blade, the limiting blocking disc is positioned by the positioning part to keep the limiting blocking piece to limit the blade to move along the waist-shaped hole, when the blade needs to be polished or replaced, the limitation of the positioning part is removed, then the limiting blocking disc is rotated to enable the blade to face the corresponding interval, so that the blade is moved along the waist-shaped hole and taken down by the flaring hole, an operator can conveniently and quickly take down the blade to polish or replace, and the overall disassembly of the hob main body is reduced.

Optionally, the positioning component is a first positioning threaded sleeve in threaded connection with the roller shaft, the limit baffle disc is fixedly connected with a butt-joint threaded sleeve, and the limit baffle disc is sleeved on the outer sleeve wall of the first positioning threaded sleeve through the butt-joint threaded sleeve.

By adopting the technical scheme, the first positioning threaded sleeve is connected to the hob shaft in advance in a threaded manner and is attached to the end part of the hob main body, and then the limiting blocking disc is sleeved on the first positioning threaded sleeve in a threaded manner through the butt-joint threaded sleeve.

Optionally, a support rib is fixed between the outer sleeve wall of the butt joint screw sleeve and the limiting blocking piece.

Through adopting above-mentioned technical scheme, support rib fixed connection further strengthens the joint strength of butt joint swivel nut and spacing separation blade at the link of butt joint swivel nut and spacing separation blade, improves the stability of spacing separation blade restriction blade.

Optionally, an axle hole for the hob shaft to pass through is formed in the axle center of the hob main body, a key groove is formed in the axle hole of the hob main body, an axle key clamped with the key groove is fixed on the axle wall of the hob shaft, and the extension length of the key groove is matched with the length of the axle key;

and the hob shaft is in threaded connection with a second positioning threaded sleeve, and the second positioning threaded sleeve is matched with the first positioning threaded sleeve to relatively abut against the shaft key and clamp the hob main body.

By adopting the technical scheme, the shaft key is matched with the key groove to form transmission connection between the hob shaft and the hob main body, the first positioning screw sleeve and the second positioning screw sleeve are in threaded sleeve connection on the hob shaft and then relatively clamp the hob main body, the installation stability of the hob main body is improved, the first positioning screw sleeve abuts against the shaft key and the hob main body, and the fast threaded rotary connection of the abutting-joint screw sleeve is facilitated, so that the limit stop piece abuts against the corresponding blade.

Optionally, a second positioning screw for locking the roller shaft is connected to the first positioning screw sleeve in a threaded penetrating manner, and a third positioning screw for locking the roller shaft is connected to the second positioning screw sleeve in a threaded penetrating manner.

By adopting the technical scheme, the first positioning screw sleeve and the second positioning screw sleeve are sleeved on the hob shaft and relatively clamp the hob main body, the second positioning screw thread penetrates through the first positioning screw sleeve and the hob shaft, and the third positioning screw thread penetrates through the second positioning screw sleeve and the hob shaft, so that the stability of the first positioning screw sleeve and the second positioning screw sleeve relatively clamping the hob main body is enhanced.

Optionally, a fourth positioning screw for locking the first positioning threaded sleeve is threaded through the butt-joint threaded sleeve.

By adopting the technical scheme, the butt joint threaded sleeve is sleeved on the positioning threaded sleeve to enable the plurality of limiting blocking pieces to be opposite to the plurality of blades one by one, and then the positioning screw is threaded in the butt joint threaded sleeve and the positioning threaded sleeve one in a penetrating manner, so that the relative positions of the butt joint threaded sleeve and the positioning threaded sleeve one are further fixed, and the stability of limiting the corresponding blades by the limiting blocking pieces is improved.

Optionally, the kidney-shaped hole extends along the axial direction of the hob main body, a plurality of screw holes for the positioning screws to be in threaded connection are formed in the tooth surface of the teeth, and the screw holes are sequentially arranged along the direction deviating from the hob main body.

Through adopting above-mentioned technical scheme, the blade uses after a period, operating personnel takes off the blade and polishes to the cutting edge of blade, many times the back of polishing, the width size of blade diminishes, operating personnel unscrews the screw of initial position with a set screw, then remove and the screw in the screw that is kept away from hobbing cutter main part one side to back, and then establish the blade on the set screw behind the adjustment position through waist type pot head once more, the convenient nimble adjustment blade that changes to blade width size settles the position, thereby be favorable to continuing to keep the cutting edge of blade to stretch out the size of tooth and use after the blade is polished.

Optionally, two inner hole walls of the teeth in the extending direction of the kidney-shaped hole are relatively fixed with elastic friction pads.

By adopting the technical scheme, in the process that an operator installs the blade on teeth, the first positioning screw penetrates through the flaring hole firstly, then the blade is pushed along the extension direction of the waist-shaped hole, the first positioning screw is relatively attached by the pair of elastic friction pads, the abrasion between the first positioning screw and the wall of the waist-shaped hole of the blade is reduced, and meanwhile, when the first positioning screw is pushed to one end, far away from the flaring hole, of the waist-shaped hole, the two ends, opposite to the elastic friction pads, of the first positioning screw are all abutted to the first positioning screw, so that the first positioning screw is limited to move towards one side of the flaring hole, and the stability of pushing and positioning of the first positioning screw relative to the blade is improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the blade can be quickly sleeved on the corresponding positioning screw I through the flared hole, the limiting blocking disc is matched with the positioning part and sleeved on the roller shaft, so that the blade can be quickly limited to move along the waist-shaped hole, when the blade needs to be polished or replaced, the limitation of the positioning part is removed, then the limiting blocking disc is rotated to enable the blade to face the corresponding interval, an operator can conveniently and quickly take down the blade for polishing or replacement, and the integral disassembly of the hob main body is reduced;

2. the shaft key is matched with the key groove to form transmission connection between the hob shaft and the hob body, the first positioning screw sleeve and the second positioning screw sleeve oppositely clamp the hob body so as to improve the installation stability of the hob body, and the first positioning screw sleeve abuts against the shaft key and the rear part of the hob body so as to be convenient for the quick butt-joint screw sleeve to be screwed on the positioning screw sleeve and enable the limit stop piece to abut against a corresponding blade;

3. when the width dimension is reduced due to repeated polishing of the cutting edge of the blade, an operator screws the first positioning screw out of the screw hole in the initial position, then moves and screws the first positioning screw back to the screw hole on one side of the hob body, and then sleeves the blade on the first positioning screw after the blade is adjusted through the waist-shaped hole, so that the arrangement position of the blade can be flexibly adjusted according to the width dimension change of the blade, and the blade can be conveniently and continuously kept to extend out of the tooth size after the blade is polished and used.

Drawings

Fig. 1 is a schematic structural diagram of a hob main body, a hob shaft, a blade, a first positioning screw sleeve and a second positioning screw sleeve which are integrally embodied in the embodiment of the present application.

Fig. 2 is a partial sectional view for embodying a first set screw, a second set screw, a third set screw, a fourth set screw, a reinforcing rib, a shaft key, and a key groove in the embodiment of the present application.

Fig. 3 is a partially broken away view of the same set of three screw holes embodying a removed condition of one of the inserts in an embodiment of the present application.

Reference number description, 1, a roll shaft; 11. a shaft key; 2. a hob main body; 21. teeth; 211. a screw hole; 22. a first positioning screw; 23. a shaft hole; 24. a keyway; 3. a blade; 31. a kidney-shaped hole; 32. a flared hole; 33. an elastic friction pad; 4. a limiting baffle disc; 41. a limiting baffle plate; 42. butting threaded sleeves; 43. a support rib; 44. positioning screws IV; 45. spacing; 5. a first positioning screw sleeve; 51. a second positioning screw; 6. a second positioning screw sleeve; 61. and a third positioning screw.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses pelleter hobbing cutter with wear resistance. Referring to fig. 1 and 2, pelleter hobbing cutter with wear resistance, establish hobbing cutter main part 2 on hobbing cutter shaft 1 including hobbing cutter shaft 1 and cover, shaft hole 23 that supplies hobbing cutter shaft 1 to run through is seted up in hobbing cutter main part 2's axle center, hobbing cutter main part 2 is located the pore wall of shaft hole 23 and has seted up keyway 24 along self axial, be fixed with shaft key 11 on hobbing cutter shaft 1's the axle wall, keyway 24 and shaft key 11 looks joint, and the extension length of shaft key 11 is the same with shaft key 11 length size, shaft key 11 cooperation keyway 24 forms the transmission of hobbing cutter shaft 1 and hobbing cutter main part 2 and is connected, operating personnel can use hobbing cutter main part 2 through installing hobbing cutter shaft 1 transmission on the pelleter.

Referring to fig. 1 and 2, a plurality of teeth 21 are arranged in the circumferential direction of the hob body 2, the teeth 21 extend along the axial direction of the hob body 2, the tooth surface of each tooth 21 is in threaded connection with a first positioning screw 22, the number of the first positioning screws 22 can be two, two first positioning screws 22 on the same tooth 21 are respectively close to and collinear with two ends of the tooth 21 in the length direction, a blade 3 is arranged on the tooth surface of the tooth 21 in threaded connection with the first positioning screws 22, the length of the blade 3 is the same as that of the tooth 21, two kidney-shaped holes 31 are arranged on the blade 3 along the length direction thereof, the two kidney-shaped holes 31 are in one-to-one correspondence with the two first positioning screws 22 on the same tooth 21, one end of each kidney-shaped hole 31 is provided with a flared hole 32, the flared hole 32 is communicated with the kidney-shaped hole 31, the screw head of the first positioning screw 22 can just pass through the flared hole 32, the radial size of the screw column of the first positioning screw 22 is matched with the width of the kidney-shaped hole 31, the blade 3 penetrates through the corresponding first positioning screws 22 through the two flared holes 32, then the first positioning screws 22 are pushed into one end, far away from the flared holes 32, of the kidney-shaped hole 31 along the length direction of the blade 3, and at the moment, two ends of the blade 3 are flush with two ends respectively corresponding to the hob body 2.

Referring to fig. 1 and 2, a limiting blocking disc 4 is rotatably sleeved at one axial end of the hob shaft 1, which is located on the hob body 2, a plurality of limiting blocking pieces 41 are circumferentially fixed on the outer peripheral wall of the limiting blocking disc 4, the plurality of limiting blocking pieces 41 correspond to the plurality of blades 3 one by one, when the limiting blocking disc 4 is attached to the end face of the hob body 2, the limiting blocking pieces 41 deviate from one side of the flared hole 32 of the corresponding blade 3 and abut against the end part of the blade 3, a gap 45 for the blade 3 to penetrate through is reserved between every two adjacent limiting blocking pieces 41, a positioning component is sleeved on the hob shaft 1 and is set to be a first positioning threaded sleeve 5 which is in threaded connection with the hob shaft 1 and abuts against the end part of the hob body 2 relatively, the end face of the limiting blocking disc 4, deviating from the hob body 1, is fixedly connected with a butt-joint threaded sleeve 42 with the same axis, and the limiting blocking disc 4 is in threaded sleeve connection with the outer sleeve wall of the first positioning threaded sleeve 5 through the butt-joint threaded sleeve 42 and abuts against and positions for positioning the blade 3; the first positioning screw 22 is matched with the kidney-shaped hole 31 to limit the blade 3 to be separated from the hob body 2, the first positioning threaded sleeve 5 is in threaded connection with the hob shaft 1 in advance and attached to the end portion of the hob body 2, then the first positioning threaded sleeve 5 is in threaded connection with the limiting blocking disc 4 through the butt-joint threaded sleeve 42, the limiting blocking disc 41 abuts against the corresponding blade 3 to keep the limiting blocking disc 41 to limit the blade 3 to move along the kidney-shaped hole 31, when the blade 3 needs to be polished or replaced, the limiting blocking disc 4 is rotated to move towards one side back to the hob body 2, the blade 3 is made to move towards the corresponding interval 45, the blade 3 is moved along the kidney-shaped hole 31 and is taken down by the flaring hole 32, operators can conveniently and quickly take down the blade 3 to be polished or replaced, and the overall disassembly of the hob body 2 is reduced.

Referring to fig. 1 and 2, one end of the hob shaft 1, which is far away from the first positioning threaded sleeve 5, is in threaded connection with a second positioning threaded sleeve 6, and the second positioning threaded sleeve 6 is matched with the first positioning threaded sleeve 5 to relatively abut against the shaft key 11 and clamp the hob main body 2; the first positioning threaded sleeve 5 and the second positioning threaded sleeve 6 are in threaded sleeve connection with the hob shaft 1 and then oppositely clamp the hob main body 2, installation stability of the hob main body 2 is improved, at the moment, the first positioning threaded sleeve 5 abuts against the shaft key 11 and the hob main body 2, the first positioning threaded sleeve 5 is conveniently in quick threaded connection with the butt-joint threaded sleeve 42, and the limiting blocking piece 41 abuts against the corresponding blade 3.

Referring to fig. 1 and 2, a support rib 43 is fixed between the outer sleeve wall of the butt thread sleeve 42 and the limit stop piece 41; the supporting rib 43 is fixedly connected to the connecting end of the butt-joint threaded sleeve 42 and the limiting blocking piece 41 to further enhance the connecting strength of the butt-joint threaded sleeve 42 and the limiting blocking piece 41, and the stability of the limiting blocking piece 41 for limiting the blade 3 is improved.

Referring to fig. 1 and 2, a first positioning screw sleeve 5 is in threaded connection with a second positioning screw 51, the second positioning screw 51 is in locking connection with the shaft wall of the roller shaft 1, a second positioning screw sleeve 6 is in threaded connection with a third positioning screw 61, the third positioning screw 61 is in locking connection with the shaft wall of the roller shaft 1, a fourth positioning screw 44 is in threaded connection with the outer sleeve wall of the butt joint screw sleeve 42, and the fourth positioning screw is positioned to lock the outer sleeve wall of the first positioning screw sleeve 5; the first positioning screw sleeve 5 and the second positioning screw sleeve 6 are sleeved on the hob shaft 1 in a threaded manner and relatively clamp the hob main body 2, the second positioning screw 51 is in threaded connection with the first positioning screw sleeve 5 and the hob shaft 1 in a penetrating manner, the third positioning screw 61 is in threaded connection with the second positioning screw sleeve 6 and the hob shaft 1 in a penetrating manner, so that the stability of the first positioning screw sleeve 5 and the second positioning screw sleeve 6 in relatively clamping the hob main body 2 is enhanced, the butt joint screw sleeve 42 is in threaded connection with the first positioning screw sleeve 5 in a penetrating manner, so that the plurality of limit stop pieces 41 are in one-to-one correspondence with the plurality of blades 3, and then the fourth positioning screw 44 is in threaded connection with the butt joint screw sleeve 42 and the first positioning screw sleeve 5 in a penetrating manner, so that the relative positions of the butt joint screw sleeve 42 and the first positioning screw sleeve 5 are further fixed, and the stability of the limit stop pieces 41 in limiting the corresponding blades 3 is improved.

Referring to fig. 2 and 3, two positioning screws one 22 on two ends of the tooth surface of the tooth 21 opposite to the tooth surface are respectively provided with a group of screw holes 211 for the threaded connection of the positioning screws one 22, a single group of screw holes 211 can be provided in three, and the three screw holes 211 in the same group are sequentially arranged along the direction departing from the hob body 2; blade 3 uses after a period, operating personnel takes off blade 3 and polishes to the cutting edge of blade 3, polish the back many times, the width size of blade 3 diminishes, operating personnel unscrews a set screw 22 screw 211 of initial position, then move and the screw in to the screw 211 that is kept away from hobbing cutter main part 2 one side, and then establish blade 3 on the set screw 22 behind the adjustment position through waist type hole 31 cover once more, the convenient nimble adjustment blade 3 position of settling to the 3 width size changes of blade, thereby be favorable to continuing to keep the cutting edge of blade 3 to stretch out the size of tooth 21 and use after blade 3 polishes.

Referring to fig. 2 and 3, two inner hole walls of the teeth 21 in the extending direction of the kidney-shaped hole 31 are relatively fixed with elastic friction pads 33; when an operator installs the blade 3 on the teeth 21, the first positioning screw 22 penetrates through the flared hole 32, then the blade 3 is pushed along the extending direction of the waist-shaped hole 31, the first positioning screw 22 is attached to the wall of the waist-shaped hole 31 by the pair of elastic friction pads 33, abrasion between the first positioning screw 22 and the wall of the waist-shaped hole 31 of the blade 3 is reduced, and meanwhile, when the first positioning screw 22 is pushed to one end, far away from the flared hole 32, of the waist-shaped hole 31, the end parts of the two opposite elastic friction pads 33 are both attached to the first positioning screw 22, so that the first positioning screw 22 is limited to move towards one side of the flared hole 32, and the stability of pushing and placing positions of the blade 3 relative to the first positioning screw 22 is improved.

The implementation principle of the granulator hobbing cutter with wear resistance is as follows: an operator sleeves the hob main body 2 on the hob shaft 1 through the shaft hole, simultaneously enables the shaft key 11 to be clamped with the key groove 24, respectively and threadedly connects the first positioning screw sleeve 5 and the second positioning screw sleeve 6 to two ends of the hob shaft 1 in advance and attaches to the end part of the hob main body 2, sequentially enables a plurality of blades 3 to pass through the corresponding first positioning screws 22 through the two flaring holes 32, then pushes the first positioning screws 22 into one end of the kidney-shaped hole 31 far away from the flaring holes 32 along the length direction of the blades 3, threadedly sleeves the first positioning screw sleeve 5 with the stop disc 4 through the butt screw sleeve 42, abuts against the corresponding blades 3 with the stop block 41, and threadedly connects the second positioning screws 51, the third positioning screws 61 and the fourth positioning screws 44 to complete integral assembly, when the blades 3 need to be polished or replaced, the fourth positioning screws 44 are screwed out, the fourth positioning screws 4 are rotated to move towards one side away from the hob main body 2, so that the blades 3 face towards the corresponding interval 45, thereby moving the insert 3 along the kidney-shaped hole 31 and removing the insert 3 from the flared hole 32.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides a pelleter hobbing cutter with wear resistance, its characterized in that: the hobbing cutter comprises a hobbing cutter shaft (1) and a hobbing cutter main body (2) sleeved on the hobbing cutter shaft (1), wherein a plurality of teeth (21) are circumferentially arranged on the hobbing cutter main body (2), the tooth surface of each tooth (21) is in threaded connection with a first positioning screw (22), a blade (3) is arranged on each tooth (21), a waist-shaped hole (31) is formed in each blade (3), one end of each waist-shaped hole (31) is provided with a flared hole (32) which is communicated with the waist-shaped hole (31) and is used for a screw head of the first positioning screw (22) to penetrate through, and the radial size of a screw column of the first positioning screw (22) is matched with the width of the waist-shaped hole (31);

the hob shaft (1) is located the rotatable cover in one end of hob body (2) is equipped with spacing fender dish (4), spacing fender dish (4) circumference is fixed with a plurality of being used for to paste spacing separation blade (41) of blade (3), and is a plurality of spacing separation blade (41) and a plurality of blade (3) one-to-one, just spacing separation blade (41) deviate from the correspondence expand mouthful hole (32) one side of blade (3), adjacent two it has the confession to reserve between spacing separation blade (41) interval (45) that blade (3) passed, be provided with on hob shaft (1) and be used for the location the locating part of spacing fender dish (4).

2. The pelletizer hob with wear resistance as set forth in claim 1, wherein: the positioning component is in threaded connection with a first positioning threaded sleeve (5) of the roller shaft (1), the limiting blocking disc (4) is fixedly connected with a butt joint threaded sleeve (42), and the limiting blocking disc (4) is sleeved on the outer sleeve wall of the first positioning threaded sleeve (5) through the butt joint threaded sleeve (42).

3. The pelletizer hob with wear resistance as recited in claim 2, wherein: and a support rib (43) is fixed between the outer sleeve wall of the butt joint screw sleeve (42) and the limiting baffle (41).

4. The pelletizer hob with wear resistance as recited in claim 2, wherein: an axle hole (23) for the roller cutter shaft (1) to penetrate through is formed in the axle center of the roller cutter main body (2), a key groove (24) is formed in the position, located on the axle hole (23), of the roller cutter main body (2), an axle key (11) clamped with the key groove (24) is fixed on the axle wall of the roller cutter shaft (1), and the extending length of the key groove (24) is matched with the length of the axle key (11);

and a second positioning threaded sleeve (6) is in threaded connection with the hob shaft (1), and the second positioning threaded sleeve (6) is matched with the first positioning threaded sleeve (5) to abut against the shaft key (11) and clamp the hob main body (2) relatively.

5. The pelletizer hob with wear resistance as set forth in claim 4, wherein: the first positioning screw sleeve (5) is in threaded connection with a second positioning screw (51) used for locking the roller shaft (1), and the second positioning screw sleeve (6) is in threaded connection with a third positioning screw (61) used for locking the roller shaft (1).

6. The pelletizer hob with wear resistance as set forth in claim 4, wherein: and a positioning screw IV (44) for locking the positioning screw sleeve I (5) is connected with the butt joint screw sleeve (42) in a threaded manner.

7. The roller cutter with wear resistance of any one of claims 1 to 6, wherein: waist type hole (31) are followed hob main part (2) axial extension, a plurality of confessions have been seted up to the flank of tooth (21) set screw (22) threaded connection's screw (211), and a plurality of screw (211) are along deviating from hob main part (2) direction sets gradually.

8. The pelletizer hob with wear resistance as recited in claim 7, wherein: two inner hole walls of the teeth (21) in the extending direction of the waist-shaped hole (31) are relatively fixed with elastic friction pads (33).

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