CN107900687A - A kind of deep-hole boring rolls Compound Machining instrument - Google Patents

Abstract

The invention belongs to the technical field of deep hole processing engineering, and in particular relates to a deep hole boring and rolling compound processing tool, which solves the problems of easy scratching of the surface of the processed workpiece when the existing boring and rolling tool retracts, long auxiliary time, and unsatisfactory processing effect. Rollers are prone to failure and other problems. It includes a boring system, a rolling system and a feed system, the boring system and the rolling system are connected, the boring system includes a boring pin cutter body, a fine boring cutter and a rough boring cutter are arranged on the boring pin cutter body, The rolling system includes a rolling cutter body, on which rollers are arranged, and the fine boring tool on the boring pin cutter body and the roller on the rolling cutter body can be radially fed or retracted at the same time. The invention has compact structure and simple operation, realizes two times of boring and two times of rolling, reduces auxiliary time during production, and improves production efficiency.

Description

A Deep Hole Boring and Rolling Composite Machining Tool

technical field

The invention belongs to the technical field of deep hole processing engineering, in particular to a deep hole boring and rolling compound processing tool.

Background technique

For precision deep hole machining with a diameter greater than 30mm, at present, the traditional processing technology of rough boring, semi-finish boring, fine boring and honing is often used. Each process is carried out separately, and the production efficiency is extremely low. Because some workpieces have high requirements for surface strength, hardness and wear resistance while requiring high precision, rolling processing causes plastic deformation of the metal surface and cold hardens the surface structure, which is currently used more a process. Therefore, there is also a machining process that uses a combination of boring and rolling. However, due to the structural reasons of the existing boring and rolling tools, there is a problem that after the machining is completed, the fine boring tool and the roller will scratch the processed workpiece when the tool is withdrawn. The serious problem of the surface is also accompanied by the problems of long auxiliary working hours, unsatisfactory processing effect, and easy failure of the rollers.

Contents of the invention

The present invention aims to solve the problem of low production efficiency of the traditional processing technology when performing precision deep hole processing, and when the existing boring and rolling tools are used, the surface of the processed workpiece is scratched when the tool is retracted, the auxiliary time is long, and the processing effect is low. It provides a deep hole boring and rolling compound machining tool for problems such as unsatisfactory and easy failure of rollers.

For overcoming above problem, the present invention adopts following technical scheme:

A deep hole boring and rolling compound processing tool, including a boring system, a rolling system and a feed system, the boring system and the rolling system are connected, the boring system includes a boring pin cutter body, and the boring pin cutter body is set There are fine boring cutters and rough boring cutters. The rolling system includes a rolling cutter body. Rollers are arranged on the rolling cutter body. The fine boring cutter on the boring pin cutter body and the roller on the rolling cutter body can simultaneously Radial feed or radial retraction.

Further, the boring pin system further includes a fine boring cutter row, the boring cutter body is radially provided with grooves, and the fine boring cutter row is inserted into the groove; the fine boring cutter is installed on the fine boring cutter row In the above, the boring pin cutter body has a through hole in the axial direction, and there is a radial position adjustment member of the fine boring cutter row in the through hole.

Further, the boring pin system also includes several cemented carbide guide blocks and some polyoxymethylene guide blocks I, several carbide guide blocks are installed on the boring cutter body in the circumferential direction, and several polyoxymethylene guide blocks I are circumferentially uniform The cloth is installed on the boring cutter body, the radial maximum dimension of the carbide guide block and the polyoxymethylene guide block I are respectively consistent with the radial maximum dimension of the rough boring tool and the fine boring tool, and the carbide guide block and polyoxymethylene The installation position of the formaldehyde guide block Ⅰ lags behind the installation positions of the rough boring tool and the fine boring tool respectively.

Further, the rollers are arranged in two rows, and each row of rollers includes a number of rollers uniformly distributed in the circumferential direction on the rolling cutter body, and each row of rollers can rotate on its own, and the rollers described are tapered rollers, and the tapered rollers The centerline of is parallel to the centerline of the rolling cutter body.

Further, the left end of the rolling cutter body is fitted with a fixed raceway body. There are two rows of grooves on the raceway body. The position and shape of the grooves correspond to two rows of tapered rollers. The cage is provided with through grooves for installing the tapered rollers, and the tapered rollers can move relative to the rolling cutter body along the parallel axis.

Further, a number of polyoxymethylene guide blocks II are fixedly installed on the right end of the rolling cutter body along the circumferential direction.

Further, the feed system includes a screw rod, a threaded sleeve, a movable block, a sealing ring, a return spring, a front end cover and a rear end cover, the left end of the boring pin body is embedded with a threaded sleeve, and the screw rod is threaded The sleeve is screwed into the boring pin cutter body, the right end of the boring pin cutter body is covered with a front end cover that can slide axially relative to it, the right end of the front end cover can act on the cage, and the right end of the boring pin cutter body There is a first square groove in the radial direction, and the position of the front cover corresponding to the first square groove wipes off the second square groove, and the two ends of the movable block are respectively put into the first square groove and the second square groove , the end of the screw rod can act on the movable block, the rear end cover is set on the rolling cutter body and can slide relative to the rolling cutter body, and the contact surface between the rear end cover and the rolling cutter body is provided with a seal The left end of the rear end cover can act on the cage, and the right end of the rear end cover is provided with a return spring in a compressed state.

Further, there is a stepped surface on the screw rod, and the screw rods on both sides of the stepped surface act on the bottom of the fine boring cutter row to complete the radial feed and reset of the fine boring cutter row. The bottom of the fine boring cutter row cooperates with it slope.

Further, the boring system and the rolling system are fixedly connected through the thread between the boring cutter body and the rolling cutter body.

Further, the tapered rollers and the raceway body both have a taper of 1:20, and there are 6 tapered rollers in each row.

When the screw is screwed in, the fine boring cutter row and the tapered roller can be fed. When the screw is screwed out, the return spring pushes the tapered roller to move to the left to make it retreat radially, and at the same time the fine boring cutter is retracted radially to achieve the tool exit. The workpiece will not scratch the surface of the processed workpiece; the two rows of tapered rollers play the role of rolling and rounding, and each guide block plays the role of supporting and reducing the radial force of the processing tool.

The advantage of the present invention is that it integrates two boring tools and two rows of rollers to realize one rough boring, one fine boring and two rolling processes. The present invention has simple structure and good processing performance; At the same time, the surface roughness can reach Ra0.4~0.2. In order to prevent the boring-rolling composite processing tool from scratching the surface of the processed workpiece when the tool is retracted, the fine boring tool can be retracted radially, and the tapered roller can also fall into the groove of the raceway body to achieve radial retraction. In order to reduce the auxiliary time, the fine boring cutter and the tapered roller of the deep hole boring and rolling compound processing tool can be radially fed and withdrawn at the same time only by turning the screw rod during operation. There are two rows of rollers for rolling. The front row mainly plays the role of rolling, and the rear row mainly plays the role of rounding. The rollers are tapered to reduce the impact between the workpiece and the rollers and extend the working life. roller life.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the A direction view of Fig. 1;

Fig. 3 is a sectional view at the B-B place of Fig. 1;

Fig. 4 is a cross-sectional view at line C-C of Fig. 2 .

In the figure: 1-screw, 2-thread sleeve, 3-tungsten carbide guide block, 4-polyoxymethylene guide block Ⅰ, 5-boring cutter body, 6-movable block, 7-tapered roller, 8-thrust bearing , 9-sealing ring, 10-polyoxymethylene guide block II, 11-rolling cutter body, 12-return spring, 13-rear end cover, 14-sleeve, 15-raceway body, 16-support pin, 17- Cage, 18-front end cover, 19-fine boring cutter row, 20-fine boring cutter, 21-rough boring cutter.

Detailed ways

The specific embodiment of the present invention will be further described in conjunction with the accompanying drawings.

A deep hole boring and rolling compound processing tool provided by the present invention includes a screw rod 1, a threaded sleeve 2, a rough boring tool 21, a carbide guide block 3, a fine boring tool row 19, a fine boring tool 20, and a polyoxymethylene guide block I4 , Boring cutter body 5, movable block 6, front end cover 18, tapered roller 7, cage 17, support pin 16, raceway body 15, thrust bearing 8, sleeve 14, rear end cover 13, sealing ring 9, Return spring 12, rolling cutter body 11; the boring-rolling composite machining tool is mainly composed of a boring system, a rolling system, and a feed system;

The boring system includes a carbide guide block 3, a polyoxymethylene guide block I4, a boring cutter body 5, a fine boring cutter row 19, a fine boring cutter 20, and a rough boring cutter 21. The left end of the boring tool body 5 is connected to the threaded sleeve 2 by screws, and the rough boring tool 21 is installed on the boring tool body 5 . The boring cutter body 5 is radially grooved, and the fine boring cutter row 19 is inserted on the boring cutter body 5; the bottom of the fine boring cutter row 19 has a partial taper, and the fine boring cutter 20 is installed on the fine boring cutter body 5. Knife row 19 on. The tungsten carbide guide block 3 and the polyoxymethylene guide block Ⅰ4 are 3 each, and are evenly distributed in the circumferential direction on the boring cutter body 5. The maximum radial dimensions of the tungsten carbide guide block 3 and the polyoxymethylene guide block Ⅰ4 are respectively equal to The rough boring tool and the fine boring tool have the same maximum radial size, the carbide guide block 3 and the polyoxymethylene guide block Ⅰ 4 are fixed on the boring tool body 5 through threaded connection, and lag behind the rough boring tool 20 and the fine boring tool respectively 21, play the role of support and guide.

The rolling system includes tapered rollers 7 , thrust bearings 8 , polyoxymethylene guide blocks II 10 , rolling cutter bodies 11 , raceway bodies 15 , support pins 16 , and cages 17 . The left end of the rolling cutter body 11 is provided with a threaded blind hole, and the boring cutter body 5 is connected with the rolling cutter body 11 through threads. The tapered rollers 7 have two rows, and each row has six tapered rollers 7, which respectively play the role of rolling and rounding; the tapered rollers 7, raceway body 15, and support pin 16 are all hardened, In order to achieve a certain service life requirements. The raceway body 15 is heat-fitted on the left end of the rolling cutter body 11; the center line of the tapered roller 7 is parallel to the center of rotation of the rolling cutter body 11 during assembly, so as to have higher use accuracy, and the polyoxymethylene There are 3 guide blocks II, and the right side of the rolling cutter body 11 is fixed and installed evenly along the circumference with screws, and its radial dimension is the required dimension within the tolerance range of the processed workpiece.

The feeding system includes a screw rod 1, a threaded sleeve 2, a movable block 6, a sealing ring 9, a return spring 12, a rear end cover 13, a sleeve 14, and a front end cover 18. The boring cutter body 5 has a square groove in the radial direction, the movable block 6 is loaded through the square groove, the sealing ring 9 and the rear end cover 13 are set on the rolling cutter body 11, and can be mounted on the shaft The front end cover 18 is set on the boring cutter body 5 and can slide axially; the screw 1 is screwed into the boring-rolling compound tool through the threaded sleeve 2 to the right, and during the screwing process, it drives the fine boring cutter 20 diameters Displacement to make it in the working position, the right end of the screw 1 is in contact with the movable block 6, so that the movable block 3 moves axially to the right. The movable block 3 is installed in the square groove of the front end cover 15 at the same time, and the front end cover 18 moves rightward along with the movable block 6 axially. The front end cover 18 drives the cage 17, the tapered roller 7, the support pin 16, the sleeve 14, and the rear end cover 13 to move axially to the right, thereby realizing the simultaneous feeding of the fine boring tool 20 and the tapered roller 7. After the processing is completed, the screw 1 is unscrewed to the left; during the unscrewing process of the screw 1, the radial dimension of the fine boring cutter row 19 is reduced, and the retraction is realized; at the same time, due to the action of the return spring 12, the screw 1 is lost at the front end cover 18. After the active force, the return spring 12 pushes the rear cover 13 and the sealing ring 9 to move axially to the left. The rear end cover 13 drives the sealing ring 9, the sleeve 14, the support pin 16, the tapered roller 8, the cage 17, the front end cover 18 and the movable block 6 to move to the left. During the movement, the tapered roller 7 falls into the roller In the groove of the channel body 15, the radial retraction of the tapered roller 7 is realized. The sleeve is on the right side of the roller so that it does not move to the right. The cage fixes the rollers at the exact position of the circumference, and the two work together to make the rollers work normally. The sleeve and the cage can be integrated or separately connected.

The materials of the tapered rollers, raceway bodies and support pins are all made of GCr15, and after heat treatment, the HRC reaches 63-67.

Both the tapered roller and the raceway body have a taper of 1:20. There are 6 tapered rollers in each row, and the tapered rollers should be assembled in pairs to reduce errors.

The return spring is always in a compressed state.

The boring system and the rolling system are fixedly connected by the thread between the boring cutter body and the rolling cutter body; the outer wall of the cage and the sleeve has evenly distributed grooves for the passage of cutting fluid, realizing Cooling and lubricating during the boring process, at the same time, the chips rush out to the front end of the workpiece; the right end of the rolling cutter body is connected to the boring bar of the machine tool through a rectangular thread. The threaded sleeve is fixed on the left end of the boring cutter body by screws.

Claims (10)

1. a kind of deep-hole boring rolls Compound Machining instrument, it is characterised in that including boring system, rolling system and feed system, boring Cut system to connect with rolling system, the boring system includes boring pin cutter hub（5）, boring pin cutter hub（5）On be provided with fine boring cutter （20）And rough boring cutter（21）, the rolling system is including rolling cutter hub（11）, roll cutter hub（11）On be provided with roller, right boring Knife（20）In boring pin cutter hub（5）Upper and roller is in rolling cutter hub（11）On can at the same time radial feed or radially retract.

2. deep-hole boring according to claim 1 rolls Compound Machining instrument, it is characterised in that the boring pin system is included also Including right boring blade row（19）, the boring cutter hub（5）Radially it is provided with groove, right boring blade row（19）It is inserted into groove；Fine boring cutter（20） Installed in the right boring blade row（19）On, the boring pin cutter hub（5）Hole axially is opened, there is right boring blade row radial position in through hole Regulating part.

3. deep-hole boring according to claim 1 or 2 rolls Compound Machining instrument, it is characterised in that the boring pin system also wraps Include some hard alloy guide pads（3）With some polyformaldehyde guide pads I（4）, some hard alloy guide pads（3）Circumferential uniformly distributed peace Mounted in the boring cutter hub（4）On, some polyformaldehyde guide pads I（4）It is circumferential to be uniformly installed on the boring cutter hub（4）On, firmly Matter alloy guide pad（3）With polyformaldehyde guide pad I（4）Radial direction full-size respectively with rough boring cutter（21）And fine boring cutter（20）'s Radial direction full-size is consistent, hard alloy guide pad（3）With polyformaldehyde guide pad I（4）Installation site lag behind heavy boring respectively Knife（21）And fine boring cutter（20）Installation site.

4. deep-hole boring according to claim 3 rolls Compound Machining instrument, it is characterised in that the roller sets two rows, often Row's roller includes circumferentially being distributed on rolling cutter hub（11）On some rollers, often arrange roller can rotation, the roller for circle Bore roller（7）, tapered roller（7）Center line with rolling cutter hub（11）Centerline parallel.

5. deep-hole boring according to claim 4 rolls Compound Machining instrument, it is characterised in that the rolling cutter hub（11）It is left The fixed raceway body of end cap dress（15）, raceway body（15）On be provided with two rows of grooves, the location and shape of groove correspond to two rows of circular cones rollings Column, raceway body（15）Outer be set with can be with respect to its slip retainer（17）, retainer（17）On be provided with straight slot installation circular cone rolling Column（7）, the tapered roller can move relative to rolling cutter hub along the direction that parallel to the axis.

6. deep-hole boring according to claim 5 rolls Compound Machining instrument, it is characterised in that the rolling cutter hub（11）It is right End, which is evenly distributed, is installed with some polyformaldehyde guide pads II（10）.

7. deep-hole boring according to claim 6 rolls Compound Machining instrument, it is characterised in that the feed system includes spiral shell Bar（1）, thread bush（2）, movable block（5）, sealing ring（9）, resetting spring（12）, drive end bearing bracket（18）And rear end cap（13）, institute The boring pin cutter hub stated（5）Left end is embedded in thread bush（2）, the screw rod（1）Pass through thread bush（2）Screw in boring pin cutter hub（5）, institute The boring pin cutter hub stated（5）Right end is set with can be with respect to its drive end bearing bracket in axial sliding（18）, the drive end bearing bracket（18）Right end It can act on retainer（17）, the boring pin cutter hub（5）Right end end is provided with the first square groove, drive end bearing bracket in the radial direction （18）The position of corresponding first square groove is scrounged second square groove, the movable block（6）To be respectively charged into first square at both ends In groove and second square groove, the screw rod（1）End can act on movable block, the rear end cap（13）It is sleeved on rolling Push type broach body（11）Above and can opposite rolling cutter hub（11）Slide, rear end cap（13）With rolling cutter hub（11）Contact surface on set it is close Seal（9）, the rear end cap（13）Left end can act on retainer（17）, rear end cap（13）Right end set in compression The resetting spring of state（12）.

8. deep-hole boring according to claim 7 rolls Compound Machining instrument, it is characterised in that there is step surface on the screw rod, Right boring blade row is acted on by the screw rod bar portion of step surface both sides（19）Complete fine boring cutter in bottom（20）Radial feed and reset Matched gradient is arranged at the right boring blade row bottom.

9. deep-hole boring according to claim 8 rolls Compound Machining instrument, it is characterised in that the boring system with it is described Rolling system passes through boring cutter hub（5）With rolling cutter hub（11）Between the connection that is screwed.

10. deep-hole boring according to claim 9 rolls Compound Machining instrument, it is characterised in that the tapered roller（7）With Raceway body（15）Have 1:20 taper, has often arranged tapered roller 6.