CN205817597U - A kind of roller rotational driving means of roll grinder - Google Patents

Abstract

The roller rotational driving means of a kind of roll grinder, belongs to roll grinder chuck apparatus technical field, carries out grinding for quickly clamping roller palm.Its technical scheme is: it is made up of upper poking claw assembly, lower pawl assembly two parts, and they structures are identical, symmetrical use.Left mandrel and right mandrel it is respectively mounted on the butterfly substrate of pusher dog assembly, the front end sleeve of left mandrel and right mandrel is equipped with copper sheathing, copper sheathing periphery suit nylon jacket, and sphere set is sleeved on above nylon jacket, butterfly substrate is fastenedly connected with driver plate activity regulation of mental activities plate, and roller palm is clamped between sphere set.This utility model need not be installed, dismantle collar, processing step is made to be simplified, grinding efficiency improves 20%, considerably reduce the radial direction additional force components added influence to roll circularity during roll drives simultaneously, reduce nearly 70%, during the roll that especially grinding own wt is relatively low, not only having saved manually, but also achieved high accuracy, every roll grinder can create effect more than 200,000 yuan every year.

Description

A kind of roller rotational driving means of roll grinder

Technical field

This utility model relates to a kind of roll carrying out on roll grinder the driving means of roller rotational during grinding, Belong to roll grinder chuck apparatus technical field.

Background technology

The roll of rolling mill for hot rolled planks and strips needs to be processed by roll grinder before upper milling train uses.Due to workpiece weight, Enormous size, so roll grinder uses the processing mode that workpiece is fixed, emery wheel is portable.Adding man-hour, roller motor drives and rolls Roller rotates, and grinding wheel drive mitor simultaneously drives emery wheel and rotates, in place of emery wheel contacts with the cutting of roll, and emery wheel cutting rotary downwards Turning, roll rotates up, i.e. emery wheel rotates against with roll, and grinding machine carriage moves along roll barrel direction with emery wheel, complete Become the grinding work of roll whole body of roll circumferencial direction.

On roll grinder during grinding roller, the method having following two driving roller rotational:

First method is, collar is manually arranged on roll and drives on homalocephalus, and lifting roll is put into grinding machine workpiece lathe bed Above central frame supporting tile, headstock driver plate single pusher dog installed above is stirred collar and is rotated, thus drives roller rotational, grinds Cut；Grinding is complete, hang out roll to barnyard ground, manually collar is unloaded be placed down on ground wait second time use, roll is put To depositing above stand, complete the grinding work of a roll.

Second method is, uses the automatic tune being made up of left driving pusher dog assembly, right two parts of pusher dog pusher dog assembly Heart homalocephalus driving means, they are exclusively used in the instrument of CNC roll grinder grinding roller, it is achieved that roll need not be installed, dismantle card Enclose the function of direct grinding.

The advantage of first method is: collar mode drives roll to make easily, low cost；Headstock driver plate uses simultaneously Single pusher dog designs, simple in construction.Its shortcoming is: grinding roller is required for manually installed collar every time, when grinding is complete, needs Manual type dismounting collar.Nearly weigh greatly 25 kilograms due to collar, thus install every time, dismounting collar is required for two people and coordinates, Safety is excessively poor, ground of often falling, and personal injury situation occurs；Fixed card ring is installed every time and needs 3 minutes, Unclamp puller bolt then to dismantle collar and need 3 minutes, 6 minutes to account for the 12% of every roll total grinding time, auxiliary Overlong time, is unfavorable for the raising of grinding efficiency, and grinding process has some setbacks simultaneously；At list pusher dog during driver plate automatic parking In close to position vertically, it is susceptible to scrape sidewipe collision during the lifting upper and lower grinding machine of roll, so grinding machine upper and lower roll every time Front needs manually reverse crawl operation revolving dial 90 ° is horizontal to pusher dog, and manual steps is many, when taking preparation Between.

Second method avoids the shortcoming of first method, but second method is because structure design reasons, drives During Impact direction have 30 ° of inclination angles, create a component effect during roller rotational, cause during roller rotational Circumferencial direction is periodically beated, and circularity in roll grinding process can be caused to increase.When roll weight ratio is bigger, roll weight is supported Most of circle that disappeared is beated, but during the less light-duty roll dressing of weight, roll deadweight cannot be completely counterbalanced by this part circle and beat, Eventually cause this harmful circle jitter values of the actual circularity superposition after roll dressing, cause the actual circularity of roll to exceed standard, grinding essence Degree declines.

Utility model content

Technical problem to be solved in the utility model is to provide the roller rotational driving means of a kind of roll grinder, this Driving means need not mount and dismount collar every time, it is possible to reduce preparatory technology step and reduce non-cutting time, can carry simultaneously The grinding accuracy of high roll, the grinding accuracy of the light-dutyest roll, and improve the grinding efficiency of light-duty roll.

The technical scheme solving above-mentioned technical problem is:

A kind of roller rotational driving means of roll grinder, it is made up of upper poking claw assembly, two parts of lower pawl assembly, Upper poking claw assembly is identical with the structure of lower pawl assembly, symmetrical use；

Upper poking claw assembly and lower pawl assembly include butterfly substrate and left mandrel, right mandrel, copper sheathing, nylon jacket, ball respectively Surface cover, butterfly substrate is symmetrily processed with left mandrel installing hole and right mandrel installing hole, the internal orifice dimension of two mandrel installing holes with Left mandrel, the external diameter of right mandrel match, and the bottom of left mandrel and right mandrel is respectively charged into left mandrel installing hole and right mandrel peace In dress hole, the front end of left mandrel and right mandrel is respectively installed with copper sheathing, and copper sheathing periphery suit nylon jacket, sphere set is sleeved on nylon Set above, fixed bolt by substrate and be fastenedly connected with driver plate activity regulation of mental activities plate by butterfly substrate, upper poking claw assembly, lower pawl assembly The distance between sphere set opposite edges on left mandrel and right mandrel matches with the width of roller palm, upper poking claw assembly, Distance between lower pawl assembly matches with the length of roller palm, upper poking claw assembly and lower pawl assembly and headstock driver plate Roll axial locating surface between distance symmetry equivalent.

The roller rotational driving means of above-mentioned roll grinder, described upper poking claw assembly, the left outside diameter of mandrel of lower pawl assembly, Right outside diameter of mandrel and copper sheathing internal diameter are rotating matched in clearance, nylon jacket internal diameter and copper sheathing external diameter, sphere set internal diameter and nylon Set external diameter is rotating matched in clearance.

The roller rotational driving means of above-mentioned roll grinder, described upper poking claw assembly, the left mandrel of lower pawl assembly, right core Axle has tightening screw with left mandrel installing hole and the right mandrel installing hole end play of butterfly substrate, and tight fixed bolt screws in clamp screw Hole connects fixing.

The roller rotational driving means of above-mentioned roll grinder, described upper poking claw assembly, the left mandrel of lower pawl assembly and the right side Having copper circlip groove, copper back-up ring to be embedded in copper circlip groove on the front end face of the sphere set that mandrel is anterior, the inner hole sleeve of copper back-up ring exists On left mandrel and right mandrel, copper back-up ring is connected fixing by copper back-up ring bolt with left mandrel and right mandrel, on left mandrel and the right side Also having circlip slot on mandrel, circlip slot is positioned at the outside of copper back-up ring position, and circlip is embedded in circlip slot In.

The roller rotational driving means of above-mentioned roll grinder, described upper poking claw assembly, the left mandrel of lower pawl assembly and the right side Having oil leab in the axis body of mandrel, the oil inlet end of oil leab is positioned on the end face of left mandrel and right mandrel, grease fitting with The oil inlet end of oil leab is installed and is connected, and the oil outlet end of oil leab is at the axis body side of left mandrel and right mandrel, oil leab Oil outlet end relative with copper sheathing oil guide groove.

The roller rotational driving means of above-mentioned roll grinder, described upper poking claw assembly, the left mandrel of lower pawl assembly and the right side There is mandrel step at mandrel rear portion.

The beneficial effects of the utility model are:

The design that this utility model have employed upper poking claw assembly, roller palm is clamped by lower pawl assembly, is being in When being automatically in parking spot, upper poking claw assembly, 4 sphere sets of lower pawl assembly are in position vertically, and roll hangs The above-below direction of dress does not has pusher dog to stop, there is not scraping collision problem, decrease manual operation time upper and lower when lifting roll Link and save non-cutting time.

This utility model have employed symmetrical force structure design, the radial direction additional force components inclination angle of roller palm during driving Less than 1.5 °, harmful additional force components is greatly lowered, and the harmful round jitter values that this component causes is reduced to 0.015 by 0.05 millimeter Below Hao meter, the driver plate activity regulation of mental activities plate that the upper poking claw assembly of symmetric design, lower pawl assembly and grinding machine carry constitutes The regulation of mental activities effect of real " ten " word power transmission shaft, it is ensured that grinding high accuracy.

This utility model is the instrument being exclusively used in CNC roll grinder grinding roller, it is achieved that roll need not be installed, dismantle The function of the direct grinding of collar.When the upper and lower roll of grinding, each grinding can save 2 road preparatory process, saves grinding and prepares 6 minutes time, reducing single roll total grinding time 12%, grinding efficiency improves 20%, and year creates effect more than 200,000 yuan, tight at manpower Under the state opened, there is significant economic benefit and promotional value.

Accompanying drawing explanation

Fig. 1 is upper poking claw modular construction schematic top plan view of the present utility model；

Fig. 2 is the installation top view of upper poking claw assembly and grinding machine driver plate activity regulation of mental activities plate；

Fig. 3 is upper butterfly substrate front view and lower butterfly substrate back schematic shapes；

Fig. 4 is the vertical view view that this utility model disengages roller palm after driver plate is retracted；

Fig. 5 is the vertical view view that this utility model blocks roller palm after driver plate stretches out；

Fig. 6 is that this utility model is installed with grinding machine driver plate activity regulation of mental activities plate and the view of clamping roller palm.

In figure, labelling is as follows: left mandrel installing hole 1, tight fixed bolt 2, substrate positioning key 3, butterfly substrate 4, location plane 5, Substrate fixed bolt hole 6, tightening screw 7, right mandrel installing hole 8, right mandrel 9, copper sheathing 10, nylon jacket 11, sphere set 12, copper shelves Ring recess 13, copper back-up ring 14, elastic scheibe 15, grease fitting 16, copper back-up ring bolt 17, copper sheathing oil guide groove 18, elastic scheibe Groove 19, copper back-up ring positioning screw hole 20, oil leab 21, left mandrel 22, mandrel step 23, substrate fix bolt 24, driver plate activity Ball when regulation of mental activities plate 25, driver plate activity regulation of mental activities plate rotary shaft 26, positioning spline 27, head of a bed revolving dial 28, opposite direction rotary roller When surface cover regulation of mental activities rotates signal 29, roll dressing, sphere set regulation of mental activities rotates signal 30, the roll axial locating surface of headstock driver plate 31, headstock 32, roller palm 33.

Detailed description of the invention

This utility model is the instrument being exclusively used in CNC roll grinder grinding roller, it is achieved that roll need not be installed, dismantle The function of the direct grinding of collar.This utility model is made up of upper poking claw assembly, two parts of lower pawl assembly, upper poking claw assembly and The structure of lower pawl assembly is identical, symmetrical use.

Upper poking claw assembly and lower pawl assembly include butterfly substrate 4, left mandrel 22, right mandrel 9, copper sheathing 10, nylon respectively Set 11, sphere set 12, copper back-up ring 14, elastic scheibe 15.

Fig. 1 shows, butterfly substrate 4 has left mandrel installing hole 1 and right mandrel installing hole 8, the endoporus of left mandrel installing hole 1 Footpath is matched in clearance with the axle diameter of left mandrel 22, between the internal orifice dimension of right mandrel installing hole 8 and the axle diameter of right mandrel 9 are Gap coordinates.In the left mandrel installing hole 1 that left mandrel 22 and right mandrel 9 are installed on butterfly substrate 4 and right mandrel installing hole 8 Kong Hou, the installing hole in butterfly substrate 4 bottom surface contacts the post-treatment tightening screw 7 that punches vertically centered by seam with both mandrels (see figure 3), fixes left mandrel 22 and right mandrel 9 with butterfly substrate 4 with tight fixed bolt 2.

Fig. 1,2 displays, the front end sleeve of left mandrel 22 and right mandrel 9 is set with nylon jacket 11 equipped with copper sheathing 10, copper sheathing 10 periphery, Sphere set 12 is sleeved on above nylon jacket 11.Left outside diameter of mandrel, right outside diameter of mandrel are rotating matched in clearance with copper sheathing internal diameter, Nylon jacket internal diameter is rotating matched in clearance with copper sheathing external diameter, sphere set internal diameter with nylon jacket external diameter.Sphere set 12 and copper Design increase between set 10 and be mounted with nylon jacket 11, the characteristic that when utilizing nylon jacket 11 stress, elastic deformation is big, on the one hand buffering Sphere set 12 and the contact impact of roller palm 33 plane, when an also isolation part is rotated by the drive system of headstock 32 self The vibrations produced, reduce these vibrations impact on roll dressing precision.Between sphere set 12 and nylon jacket 11, nylon jacket 11 and copper Between set 10, can arbitrarily rotate between copper sheathing 10 and mandrel, during driving roller rotational, if roller central line and mill Bed centrage is misaligned, will slide in roller palm 33 position, and sphere set 12 will occur slight rotation, self adaptation regulation of mental activities position Put, and belong to, owing to sphere set 12 contacts the slight mobile of position with roller palm 33, the rolling friction that sphere set 12 rotates, keep away Exempt from roller palm 33 and contact the abrasion of position.

Fig. 1,3 displays, butterfly substrate 4 bottom surface machined positioning key 3, is used for bearing rotation torque.The centre of butterfly substrate 4 There are four substrate fixed bolt holes 6, fix bolt 24 with four substrates and butterfly substrate 4 is fixed on the driver plate activity regulation of mental activities of grinding machine Above plate 25.The positioning key 3 of butterfly substrate 4 bottom surface blocks driver plate activity regulation of mental activities plate 25 positioning spline 27 above, completes radially Location.Butterfly substrate 4 location plane 5 above contacts with driver plate activity regulation of mental activities plate 25 locating surface above simultaneously, completes axially Location.

Fig. 1 shows, the front end face of the sphere set 12 of left mandrel 22 and right mandrel 9 front portion has copper circlip groove 13, copper back-up ring 14 are embedded in copper circlip groove 13, and the inner hole sleeve of copper back-up ring 14 is on left mandrel 22 and right mandrel 9, first by copper back-up ring bolt In the 17 copper back-up ring positioning spiro pits 20 screwing in left mandrel 22 and right mandrel 9, bolt 17 is by copper back-up ring 14 and left mandrel 22 Connect fixing with right mandrel 9, notice that the dowel hole of copper back-up ring 14 is directed at copper back-up ring bolt 17 exceeds mandrel surface part, I.e. copper back-up ring bolt 17 uses as the positioning key of copper back-up ring 14, prevents sphere set 12 in low-angle regulation of mental activities rotary course Copper back-up ring 14 follows rotation.Also having circlip slot 19 on left mandrel 22 and right mandrel 9, circlip slot 19 is positioned at copper back-up ring The outside of 14 positions, circlip 15 is embedded in circlip slot 19.

Fig. 1 shows, has oil leab 21, the oil inlet end of oil leab 21 to be positioned in the axis body of left mandrel 22 and right mandrel 9 On the end face of left mandrel 22 and right mandrel 9, grease fitting 16 is arranged on the end face of left mandrel 22 and right mandrel 9, grease fitting 16 are connected with the oil inlet end of oil leab 21, the oil outlet end of oil leab 21 in left mandrel 22 and the axis body side of right mandrel 9, The oil outlet end of oil leab 21 is relative with copper sheathing oil guide groove 18, and butter is overflowed in daily oiling to copper sheathing 10 endoporus.

Fig. 1 shows, there is mandrel step 23 at left mandrel 22 and right mandrel 9 rear portion, keeps away when operating distance adjustment and regulation of mental activities Allow location conflicts.

Fig. 5 shows, the sphere that the left mandrel 22 of upper poking claw assembly sphere set 12 installed above, right mandrel 9 are installed above Operating distance between set 12 matches with the width of roller palm 33.

Fig. 5 shows, the sphere that the left mandrel 22 of lower pawl assembly sphere set 12 installed above, right mandrel 9 are installed above Operating distance between set 12 matches with the width of roller palm 33.

Directly stretching out driver plate during routine use, four spheres sets 12 directly block roller palm 33, no matter forward or inverse To rotation, it is the homalocephalus plane of clinodiagonal two spheres set 12 contact roll 33 every time, drives roller rotational.

On the left of this device, the centerline parallel between upper and lower two spheres set 12 is in roller palm 33, simultaneously also parallel with dialling The axis of the rotary shaft 26 of disk activity regulation of mental activities plate 25；Centrage between right side upper and lower two spheres set 12 is flat also parallel with roll 33, simultaneously also parallel with the axis of rotary shaft 26 of driver plate activity regulation of mental activities plate 25；Quite upper and lower two spheres in left side set 12, the right side Side upper and lower two spheres set 12, roller palm 33, regulation of mental activities plate rotary shaft 26 four axis in being substantially parallel.

Fig. 6 shows, the distance between upper poking claw assembly and lower pawl assembly matches with the length of roller palm 33.

The mounting and adjusting of pusher dog assembly of the present utility model:

After upper poking claw assembly, lower pawl assembly all assemble, first operation headstock driver plate 28 rotates, and makes driver plate The positioning spline 27 of movable regulation of mental activities plate 25 is horizontal and is beneficial to mounting and adjusting, is fixed with four substrates by upper poking claw assembly Butterfly substrate 4 is fixed on above the driver plate activity regulation of mental activities plate 25 of grinding machine by bolt 24, and same method installs lower pawl assembly at mill Above the driver plate activity regulation of mental activities plate 25 of bed.

Distance between lateral adjustments two pusher dog assembly, makes between two sphere sets 12 of the same side of two pusher dog assemblies Centre-to-centre spacing is 170 millimeters (matching with the length of roller palm 33), and two pusher dog assemblies are axially fixed with the roll of headstock driver plate Distance between plane 31 is symmetry equivalent, all substrates is fixed bolt 24 and fastens and i.e. complete mounting and adjusting of the present utility model Work.

Verify that installation site of the present utility model is the most correct:

The torr watt size of grinding machine being regulated correct, grinding machine U1 axle to " zero " position, above lifting roll to grinding machine workpiece lathe bed Central frame supporting tile above, centre frame off-loading function open compensation fall bearing block weight.

Crawl operation headstock driver plate 28 rotates, and makes respective two spheres of upper poking claw assembly, lower pawl assembly overlap 12 right Positive roller palm 33.

Operation headstock driver plate 28 forward extends out 150 millimeters, makes the roll axial locating surface 31 of headstock driver plate withstand and rolls The end face of roller 33, lower pawl module position in inspection, the left mandrel 22 of every side and the sphere set 12 of right mandrel 9 and roller palm 33 Side between should 4 millimeters of gaps, four spheres set 12 should be positioned at the centre position of the length directions of roller palm 33.

Adjustment roller palm 33 automatic stopping position:

Crawl headstock driver plate 28 rotates, and drives roller palm 33 to upright position ± 5 °, opens grinding carriage case 32, will It is effective that parking spot detection proximity switch is retrofitted to current location, and grinding machine automatic stopping is to current location i.e. every time, makes roll flat 33 are in upper and lower plumbness, meet milling train status requirement.

This utility model is owing to have employed the split design of upper poking claw assembly, lower pawl assembly, at maintenance headstock driver plate Roll axial locating surface 31 time, can directly unclamp butterfly substrate and fix bolt 6, by upper poking claw assembly, lower pawl assembly edge The positioning spline 27 of driver plate activity regulation of mental activities plate 25 pulls out a segment distance, exposes the roll axial locating surface of headstock driver plate 31, directly overhaul.

Work process of the present utility model is as follows:

Mounted upper poking claw assembly, the lower pawl assembly clamping process to roller palm 33.

The first step, check the upper poking claw assembly above driver plate, whether four spheres set 12 of lower pawl assembly is in vertical Upper and lower parking spot (if being automatic stopping last time, then can parking spot the most vertically), otherwise crawl rotation Transfer dish is to parking spot (vertical direction).Lifting roll, to above grinding machine workpiece lathe bed, is put into above central frame supporting tile, unlatching Off-loading function compensation falls bearing block weight.

Second step, operation headstock driver plate 28 forward extend out 150 millimeters, four above upper poking claw assembly, lower pawl assembly Individual sphere set 12 blocks roller palm 33, starts to drive roller rotational (grinding) to get final product (see Fig. 5, Fig. 6).

3rd step, grinding are complete, and headstock driver plate 28 is parked in the parking spot set, the most upper and lower pusher dog assembly automatically Four spheres set 12 be in parking spot (see figure 6) vertically.Retraction headstock driver plate 28(150 millimeter stroke), Four sphere set 12 disengagement roller palms 33 above upper and lower pusher dog assembly, possess roll and hang out condition (see figure 4).Now roll The above-below direction of roller lifting does not has pusher dog to stop, can directly hang out roll, so the most artificial crawl revolving dial 28 rotates 90 ° of operating procedures dodged eliminate.

4th step hangs out roll, and to put it to deposit stand standby, completes a grinding process.

Claims (6)

1. the roller rotational driving means of a roll grinder, it is characterised in that: it is by upper poking claw assembly, lower pawl assembly two Part is constituted, and upper poking claw assembly is identical with the structure of lower pawl assembly, symmetrical use；

Upper poking claw assembly and lower pawl assembly include respectively butterfly substrate (4), left mandrel (22), right mandrel (9), copper sheathing (10), Nylon jacket (11), sphere set (12), butterfly substrate (4) is symmetrily processed with left mandrel installing hole (1) and right mandrel installing hole (8), the internal orifice dimension of left mandrel installing hole (1) and right mandrel installing hole (8) and left mandrel (22), the external diameter phase of right mandrel (9) Joining, the bottom of left mandrel (22) and right mandrel (9) is respectively charged in left mandrel installing hole (1), right mandrel installing hole (8), Zuo Xin The front end sleeve of axle (22) and right mandrel (9) overlaps equipped with copper sheathing (10), copper sheathing (10) periphery suit nylon jacket (11), sphere set (12) Being contained in nylon jacket (11) above, butterfly substrate (4) is fixed bolt (24) by substrate and is fastenedly connected with driver plate activity regulation of mental activities plate (25), The distance between sphere set (12) opposite edges on upper poking claw assembly, the left mandrel (22) of lower pawl assembly and right mandrel (9) Match with the width of roller palm (33), the distance between upper poking claw assembly, lower pawl assembly and the length of roller palm (33) Degree matches, and the distance between the roll axial locating surface (31) of upper poking claw assembly and lower pawl assembly and headstock driver plate is symmetrical Equal.

The roller rotational driving means of roll grinder the most according to claim 1, it is characterised in that: described upper poking claw group Part, the left outside diameter of mandrel of lower pawl assembly, right outside diameter of mandrel and copper sheathing internal diameter are rotating matched in clearance, nylon jacket internal diameter with Copper sheathing external diameter, sphere set internal diameter is rotating matched in clearance with nylon jacket external diameter.

The roller rotational driving means of roll grinder the most according to claim 2, it is characterised in that: described upper poking claw group Part, the left mandrel (22) of lower pawl assembly, right mandrel (9) and the left mandrel installing hole (1) of butterfly substrate (4) and right mandrel are installed There is tightening screw (7) hole (8) end play, and tight fixed bolt (2) screws in tightening screw (7) and connects fixing.

The roller rotational driving means of roll grinder the most according to claim 3, it is characterised in that: described upper poking claw group Copper circlip groove (13) is had on the front end face of the sphere set (12) that part, the left mandrel (22) of lower pawl assembly and right mandrel (9) are anterior, Copper back-up ring (14) is embedded in copper circlip groove (13), the inner hole sleeve of copper back-up ring (14) on left mandrel (22) and right mandrel (9), copper Copper back-up ring (14) is connected fixing by back-up ring bolt (17) with left mandrel (22) and right mandrel (9), on left mandrel (22) and the right side Mandrel (9) is upper also has circlip slot (19), and circlip slot (19) is positioned at the outside of copper back-up ring (14) position, circlip (15) it is embedded in circlip slot (19).

The roller rotational driving means of roll grinder the most according to claim 4, it is characterised in that: described upper poking claw group Oil leab (21), the oil-feed of oil leab (21) is had in the axis body of part, the left mandrel (22) of lower pawl assembly and right mandrel (9) End is positioned on the end face of left mandrel (22) and right mandrel (9), and grease fitting (16) connects with the oil inlet end installation of oil leab (21) Connecing, the oil outlet end of oil leab (21) is at left mandrel (22) and the axis body side of right mandrel (9), the oil outlet end of oil leab (21) Relative with copper sheathing oil guide groove (18).

The roller rotational driving means of roll grinder the most according to claim 5, it is characterised in that: described upper poking claw group There is mandrel step (23) at part, the left mandrel (22) of lower pawl assembly and right mandrel (9) rear portion.