CN112935811A

CN112935811A - Oil groove machining center for machining bearing bush oil line

Info

Publication number: CN112935811A
Application number: CN202110121534.XA
Authority: CN
Inventors: 孙卫东; 王吉平; 赵洪伟; 张建; 刘明志
Original assignee: Yantai Dafeng Plain Bearing Co ltd
Current assignee: Yantai Dafeng Plain Bearing Co ltd
Priority date: 2018-12-15
Filing date: 2018-12-15
Publication date: 2021-06-11
Anticipated expiration: 2038-12-15
Also published as: CN109605042A; CN112935811B; CN112935812B; CN112935813B; CN112318120A; CN112935812A; CN112935813A; CN109605042B

Abstract

The invention relates to an oil groove machining center for machining a bearing bush oil line, which comprises a pairing turning machine, a pair of boring hole marking bearing bush pieces and a pair of turning machine, wherein the pairing turning machine is used for distributing chamfering bearing bush pieces into the pair of boring hole marking bearing bush pieces to be machined; the machining part is used for carrying out boring marking and oil groove machining on a boring marking bearing bush piece, and comprises a boring marking center, a boring fixture machine, an oil groove machining center, a machining rear bearing bush piece, a groove milling fixture machine, a bearing output belt and a machining rear bearing bush piece output by the groove milling fixture machine, wherein the boring marking center is used for carrying out boring marking on a to-be-machined boring marking bearing bush piece, the boring fixture machine is connected with the process of carrying a pairing turning machine and feeds to the boring marking center, the oil groove machining center is used for machining the boring marking bearing bush piece into the machining rear bearing bush piece, the groove milling fixture machine is connected with the process of the boring fixture machine and feeds. The invention has reasonable design, compact structure and convenient use.

Description

Oil groove machining center for machining bearing bush oil line

Technical Field

The invention relates to an oil groove processing center for processing an oil line of a bearing bush; the mother case is CN201811537434.X bearing bush high-precision oil line processing equipment, processing method and assembling method. Application date: 20181215.

background

The bearing is a component for fixing and reducing the load friction coefficient in the mechanical transmission process. It can also be said that the other members are used to reduce the friction coefficient during power transmission and to keep the center position of the shaft fixed when they move relative to each other on the shaft. The bearings can be classified into rolling bearings and sliding bearings according to the frictional properties of the moving elements. The bush is a part of the sliding bearing which is directly contacted with the shaft, is very smooth, is generally made of wear-resistant materials such as bronze, antifriction alloy and the like, and is in the shape of a bush-shaped semi-cylindrical surface. The bearing bush has the functions of bearing the acting force applied by the journal, keeping the oil film stable, enabling the bearing to work stably and reducing the friction loss of the bearing. The bearing shell generally comprises: the main bearing bush is arranged on a main bearing seat of the machine body and is used for reducing the friction resistance of the shaft neck and reducing the abrasion of the shaft neck; the thrust bearing bush is arranged on the inner side of the main bearing seat, bears the thrust of axial movement when the crankshaft rotates and has the function of reducing friction; and the crankshaft bearing bush is arranged on the fixed bracket of the crankshaft and the cylinder body.

When the sliding bearing works, a layer of thin oil film is required to be arranged between the bearing bush and the rotating shaft for lubricating. If the lubrication is poor, direct friction exists between the bearing bush and the rotating shaft, and the friction generates high temperature, and although the bearing bush is made of special high-temperature-resistant alloy materials, the high temperature generated by the direct friction is still enough to burn out the bearing bush. In addition, in order to reduce the friction force, the radian of the inner side surface of the bearing bush needs to be ensured, and the inner side surface of the bearing bush is polished to be smooth enough so as to reduce the friction force between the bearing bush and the shaft as much as possible.

In the prior art, the bearing bush is processed, and after the bearing bush needs to be fixed, the inner side face of the bearing bush is processed by using a cutter. The concrete mode is at the pivot front end installation cutter of motor, places the axle bush in accommodation space, and when the motor started, the pivot drove the rotatory counter shaft bush medial surface of cutter and processes. When the cutter rotates around the rotating shaft, the rotating shaft moves along the axis direction of the bearing bush, and the whole inner side surface of the bearing bush is machined.

However, since the machining of the bush by the tool is rough, the inner surface of the bush needs to be polished by using a material such as sandpaper in order to smooth the inner surface. And at present polish manually and realize, even after using the cutter to process the axle bush internal surface into needs shape, take off the axle bush, artifical use abrasive paper to polish the axle bush medial surface, until meeting the demands, not only the cost of labor is high, it is probably inhomogeneous to polish, and efficiency is still very low, awaits the improvement urgently. CN201210230281.0 an automatic processing equipment of axle bush, CN201520604639.0 an automatic beveler of axle bush etc. processing effect is not ideal.

Disclosure of Invention

The technical problem to be solved by the invention is to provide an oil groove machining center for machining an oil line of a bearing bush; the technical problems to be solved and the advantages to be achieved are set forth in the description which follows and in the detailed description of the embodiments.

In order to solve the problems, the technical scheme adopted by the invention is as follows:

the utility model provides an oil groove machining center of processing axle bush oil line, including setting up on the cutter frame and be located the left oil groove lift cylinder in bore hole mark center, be provided with the milling cutter seat on oil groove lift cylinder lower extreme piston rod, radially be provided with oil groove milling cutter telescopic cylinder on the milling cutter seat, the outer tip is provided with oil groove milling cutter rotating head at oil groove milling cutter telescopic cylinder, be provided with the oil groove milling cutter that is used for carrying out the milling flutes to bore hole mark axle bush spare on oil groove milling cutter rotating head, be provided with the oil groove milling cutter rotary motor who is used for driving the milling cutter seat around oil groove lift cylinder piston rod is rotatory on oil groove lift cylinder, be provided with oil groove drill head at the milling cutter seat lower extreme, the level is provided with the oil groove drill bit cutter that is.

A bearing bush high-precision oil line processing device comprises

The pairing turning machine is used for distributing the chamfer bearing bush pieces into the pair of boring hole marking bearing bush pieces to be processed;

a machining part for bore marking and machining oil grooves in a bore marked bearing shell piece, comprising

A boring mark center for boring and marking the shaft bushing piece to be processed,

A boring clamp machine which is connected with the process of the bearing matching direction-changing machine and feeds materials to a boring mark center,

The oil sump processing center of claim 1, wherein the bore hole marked bearing shell pieces are machined to form a machined bearing shell piece,

A groove milling fixture machine which is connected with the boring fixture machine and feeds materials to the oil groove processing center,

And the bearing bush output belt is used for outputting the machined bearing bush piece output by the milling groove fixture machine.

Drawings

FIG. 1 is a schematic view of the construction of a mating machined part of the present invention.

Fig. 2 is a schematic view of the structure of the counterpart of the present invention.

Fig. 3 is a schematic view of the structure of the clamping mechanism of the present invention.

Fig. 4 is a schematic view of the structure of the machining tool of the present invention.

Detailed Description

As shown in FIGS. 1 to 4, the high-precision oil line processing equipment for bearing bushes of the present embodiment comprises

A pair of direction changing machines 18 for distributing the chamfered bush pieces 17 into pairs of bore hole marking bush pieces 21 to be machined;

a machining part for boring marking and machining oil grooves for a bore marking shoe 21, comprising

A boring mark center 20 for boring and marking a bearing bush member 21 to be processed,

A boring clamp machine 19 which is connected with the receiving and matching direction-changing machine 18 in the working procedure and feeds materials to a boring marking center 20,

An oil groove machining center 23 for machining the bore hole marking bush piece 21 into a machined bush piece 24,

A groove milling fixture machine 22 which is connected with the boring fixture machine 19 and feeds materials to an oil groove processing center 23,

And a bush output belt 25 for outputting the machined bush piece 24 output by the groove milling jig 22.

Comprises at least one of the following schemes;

in the first scheme, the paired direction changing machine 18 comprises a paired input belt 87 with an inner concave surface facing towards the forward direction chamfer bearing piece 17 arranged on the side stand, a paired rack positioned on the left side of the paired input belt 87, a paired swinging head 90 arranged above the paired rack and swinging on a horizontal plane, a paired left or right output belt 88 symmetrically positioned on two sides of the paired swinging head 90 and with an input end connected with the output end of the paired input belt 87 in a working procedure, the device comprises a pair arc-shaped guide track 89, a pair central swing arm 91 and a pair left or right swing arm 92, wherein the pair arc-shaped guide track 89 is arranged between the input end of the pair left or right output belt 88 and the output end of the pair input belt 87 and is used for turning and conveying the pair input belt 87, the pair central swing arm 91 is horizontally arranged on a pair swing head 90 and is used for shifting the chamfering shaft bush part 17 to one side of the pair arc-shaped guide track 89 and is in contact with the chamfering end face on the other side of the chamfering shaft bush part 17, and the pair left or right swing arm 92 is arranged on two sides of the pair central swing arm;

the boring jig 19 comprises two symmetrically arranged jig frames 93, a left output belt 88 or a right output belt 88 with a left end output part and a middle transmission part which are respectively arranged on the corresponding jig frames 93 and used for longitudinally transmitting the boring marking axle bush piece 21, a jig limit baffle 94 which is arranged on the jig frames 93 and used for preventing the forward movement of the chamfering axle bush piece 17, a jig profiling telescopic seat 95 which is transversely arranged on the jig frames 93, is positioned at the right side of the jig limit baffle 94 and used for transversely and telescopically arranging the jig profiling telescopic seat above the middle part of the left output belt 88 or the right output belt 88, a jig profiling positioning arc-shaped groove 97 which is arranged at the end part of the jig profiling telescopic seat 95 and used for positioning and contacting with the convex arc surface of the boring marking axle bush piece 21 to be machined, a jig lower pressing plate air cylinder 96 which is arranged on the jig profiling telescopic seat 95 and is used for pressing and clamping the upper end side surface of the boring marking axle bush piece 21 to, The clamp positioning and pushing device comprises a clamp auxiliary lower bracket 100 vertically arranged on one side of the paired left or right output belt 88, a clamp transverse cylinder 98 arranged on the clamp frame 93 and used for driving a clamp profiling telescopic seat 95 to transversely move to the clamp auxiliary lower bracket 100, and a clamp positioning or pushing air nozzle 99 which is arranged on the clamp profiling telescopic seat 95 and used for adsorbing the outer side wall of a to-be-machined boring mark bearing bush piece 21 in a negative pressure positioning mode or used for pushing the machined boring mark bearing bush piece 21 to the paired left or right output belt 88 from the clamp profiling telescopic seat 95 in a positive pressure mode;

the clamp profiling telescopic seats 95 on the two sides move oppositely to splice the half-and-half boring hole marking bearing bush pieces 21 positioned in the clamp profiling positioning arc-shaped groove 97 into a circular ring shape; (ii) a

A tool frame 101 is provided between the two jig frames 93;

the boring mark center 20 includes a boring cutter elevating cylinder 110 vertically disposed on the cutter frame 101; a boring cutter pairing mark laser head 109 for marking pairing marks, an upper boring cutter auxiliary supporting assembly 108 sleeved on the cutter frame 101 through a bearing, a main boring cutter rod 106 and a lower boring cutter auxiliary sleeve 103 sleeved on the cutter frame 101 through a bearing are sequentially arranged on a piston rod of a boring cutter lifting cylinder 110 from top to bottom, and a boring cutter rotation driving motor 102 for driving the main boring cutter rod 106 to rotate is arranged on the cutter frame 101;

a boring cutter double-edge tool 107 or a single-edge boring cutter for boring and splicing the annular inner holes is radially inserted on the boring cutter main boring rod 106, boring cutter radial support push rods 104 are radially arranged on the boring cutter upper auxiliary support assembly 108 and/or the boring cutter lower auxiliary sleeve 103 in an array manner, and boring cutter radial support rollers 105 for pressure contact with the side walls of the spliced annular inner holes are arranged at the end parts of the boring cutter radial support push rods 104;

a groove milling fixture machine 22 with the same structure as the boring fixture machine 19 is arranged at the left output end part of the paired left or right output belt 88;

the oil groove machining center 23 includes an oil groove lifting cylinder 111 disposed on the cutter frame 101 and located on the left side of the boring mark center 20, a milling cutter seat is disposed on a piston rod at the lower end of the oil groove lifting cylinder 111, an oil groove milling cutter telescopic cylinder 114 is radially disposed on the milling cutter seat, an oil groove milling cutter rotating head 113 is disposed at the outer end of the oil groove milling cutter telescopic cylinder 114, an oil groove milling cutter 112 used for milling a groove in the boring mark bearing bush 21 is disposed on the oil groove milling cutter rotating head 113, an oil groove milling cutter rotating motor 115 used for driving the milling cutter seat to rotate around the piston rod of the oil groove lifting cylinder 111 is disposed on the oil groove lifting cylinder 111, an oil groove drill head 117 is disposed at the lower end of the milling cutter seat, and an oil groove drill head tool 116 used for drilling the boring mark bearing.

The assembling method of the bearing bush high-precision oil line machining equipment comprises the following steps of step four, assembling a pairing direction changer 18; step five, processing parts by an assembling machine; step six, assembling a bearing bush output belt 25; and step seven, sequentially connecting the pairing turning machine 18, the machining part and the bearing bush output belt 25 from right to left.

In steps four to five, at least one set of the following steps is included; wherein the content of the first and second substances,

in step four there is included the step of,

firstly, connecting a matched input belt 87 with an output end of a chamfer conveying belt in a working procedure; then, a mating swing head 90 is installed on the left side of the mating input belt 87, and a mating left or right output belt 88 is installed on both sides of the mating swing head 90; secondly, a pair of arc-shaped guide rails 89 are installed between the pair of input belts 87 and the pair of left or right output belts 88; thirdly, a matched center swing arm 91 and a matched left or right swing arm 92 which are used for shifting the chamfer bearing bush part 17 to the matched arc-shaped guide track 89 on one side are arranged on the matched swing head 90;

the following steps are included in the step five,

step five, assembling the boring jig machine 19, firstly, symmetrically installing two jig racks 93 at the outer sides of the middle parts of the paired left or right output belts 88, and meanwhile, installing the jig auxiliary lower brackets 100 at the inner sides of the middle parts of the paired left or right output belts 88; then, a fixture limiting baffle 94 for stopping the forward movement of the chamfer bearing bush piece 17 is transversely arranged on the fixture frame 93, and meanwhile, a fixture transverse cylinder 98 is arranged on the fixture frame 93; secondly, a clamp lower pressure plate cylinder 96 of a piston rod seat for pressing and clamping the side surface of the upper end of the to-be-machined boring mark bearing bush piece 21 is installed on a clamp profiling telescopic seat 95, and meanwhile, a clamp positioning or pushing air nozzle 99 for negative pressure positioning and adsorbing the outer side wall of the to-be-machined boring mark bearing bush piece 21 or positive pressure pushing the machined boring mark bearing bush piece 21 from the clamp profiling telescopic seat 95 to the paired left or right output belt 88 is installed on the clamp profiling telescopic seat 95; thirdly, adjusting the positioning of the clamp or pushing the pressure of the air nozzle 99 to meet the requirement that the clamp profiling positioning arc-shaped groove 97 adsorbs the convex arc surface of the to-be-machined boring mark bearing bush piece 21; finally, adjusting the fixture profiling telescopic seats 95 to meet the requirement that the two fixture profiling telescopic seats 95 move oppositely to splice the half-and-half boring mark bearing bush pieces 21 positioned in the fixture profiling positioning arc-shaped grooves 97 into a circular ring shape;

step two, assembling the boring mark center 20, firstly, installing the cutter frame 101 between the two fixture frames 93; then, the boring cutter lifting cylinder 110 is mounted on the cutter frame 101; secondly, a boring cutter pairing mark laser head 109 for printing pairing marks, an upper boring cutter auxiliary supporting assembly 108 sleeved on the cutter frame 101 through a bearing, a main boring cutter rod 106 of the boring cutter, and a lower boring cutter auxiliary sleeve 103 sleeved on the cutter frame 101 through a bearing are sequentially arranged on a piston rod of a boring cutter lifting cylinder 110 from top to bottom; thirdly, a boring cutter rotation driving motor 102 which drives a boring cutter main boring rod 106 to rotate is installed on the cutter frame 101, meanwhile, a boring cutter double-blade cutter 107 or a single-blade boring cutter which is used for boring and splicing the annular inner hole is installed on the boring cutter main boring rod 106 in the radial direction, and meanwhile, a boring cutter radial supporting push rod 104 is installed on an upper boring cutter auxiliary supporting component 108 and/or a lower boring cutter auxiliary sleeve 103 in the radial direction and in an array mode; then, the contact pressure of the boring cutter radial supporting roller 105 and the side wall of the spliced circular inner hole is adjusted through the boring cutter radial supporting push rod 104;

step five, referring to step five, assembling a groove milling fixture machine 22 on the left side of the boring fixture machine 19;

fifthly, assembling the oil groove machining center 23, namely firstly, installing an oil groove lifting cylinder 111 positioned on the left side of the assembling boring hole marking center 20 on the cutter frame 101; then, a milling cutter seat is installed at the lower end of the oil groove lifting cylinder 111; secondly, an oil groove drill head 117 is arranged below the milling cutter seat; thirdly, an oil groove milling cutter rotary motor 115 which is driven by key connection or gear rack driving to horizontally swing a milling cutter seat is installed on the cutter frame 101, an oil groove milling cutter telescopic cylinder 114 is installed on the milling cutter seat, an oil groove milling cutter rotary head 113 is installed at the end of the oil groove milling cutter telescopic cylinder 114, and an oil groove drill cutter 116 is installed on an oil groove drill head 117.

The bearing shell high-precision oil line machining method of the embodiment comprises a pairing method based on a pairing redirector 18 and/or a machining method based on a machined part which are sequentially carried out by means of bearing shell oil line machining equipment.

The method comprises at least one group of steps; wherein the content of the first and second substances,

in the pairing method, the following steps are included;

step F, matching, namely firstly, a matching input belt 87 receives the chamfering bearing bush piece 17 output by the chamfering conveyor belt and transmits the chamfering bearing bush piece to the left; then, the paired swing head 90 drives the paired central swing arm 91 to contact with the other end face of the chamfering bearing bush piece 17, and simultaneously, the paired left or right swing arm 92 contacts with the inner concave face of the chamfering bearing bush piece 17 which is being shifted; secondly, the counter-oscillating head 90 feeds the chamfered bearing bush pieces 17 along the corresponding counter-arcuate guide tracks 89 onto the left or right counter-output belts 88 on one side; thirdly, the paired swinging head 90 swings back, the above contents are repeated, and the next one is sent to the paired left or right output belt 88 on the other side; finally, the paired left or right output belts 88 on both sides drive the respective chamfered bearing bush pieces 17 to move leftward;

in a machining method, comprising the steps of;

g, clamping by a boring clamp, namely firstly, transversely moving a clamp profiling telescopic seat 95 to be in positioning contact with the outer convex cambered surface of the to-be-machined boring mark bearing bush piece 21; then, starting the fixture positioning or pushing air nozzle 99 to absorb the boring mark bearing bush piece 21 into the fixture profiling positioning arc-shaped groove 97; secondly, the clamp profiling telescopic seat 95 transversely conveys the boring mark bearing bush piece 21 to the upper part of the clamp auxiliary lower bracket 100, and the two boring mark bearing bush pieces 21 are spliced into a circular ring shape; thirdly, the clamp auxiliary lower bracket 100 lifts up to lift the clamp profiling telescopic seat 95 lower surface;

step H, boring marking, namely firstly, the boring cutter radial supporting roller 105 of the boring cutter lower auxiliary sleeve 103 supports against the inner side wall of the circular ring in the step G at the same time; then, the boring cutter rotation driving motor 102 and the boring cutter lifting cylinder 110 together drive the boring cutter double-edge cutter 107 or the single-edge boring cutter to bore the circular inner side wall; secondly, in the descending process, the boring cutter radial supporting roller 105 of the boring cutter upper auxiliary supporting assembly 108 supports against the inner side wall of the circular ring in the step G after processing; thirdly, the boring tool pairing-marking laser head 109 marks the pair of boring marking shoe pieces 21 according to the programming; finally, the boring fixture clamps and drives the respective boring mark bearing bush piece 21 to be sent back to the paired left or right output belt 88, and the fixture positioning or pushing air nozzle 99 is started to send the boring mark bearing bush piece 21 out of the fixture profiling positioning arc-shaped groove 97;

step J, clamping by an oil groove processing clamp, repeating the step G,

step K, firstly, the oil groove drill head 117 is started to drill the boring mark bearing bush piece 21; then, the oil groove lifting cylinder 111 drives the milling cutter seat to descend; secondly, the oil groove mill rotating head 113 processes the oil groove under the driving of the oil groove mill rotating motor 115; finally, the machined bore hole marking shoe element 21 is fed to the machined shoe element 24 on the mating left or right output belt 88 and out through the shoe output belt 25.

The pairing direction changing machine 18 realizes automatic pairing, manual selection is omitted, the mechanism is ingenious, and the cost is low;

the paired input belt 87 is used as a main input, the paired left or right output belt 88 is used as a branch conveying, the paired arc guide tracks 89 realize guide and direction change, the paired swing heads 90-the paired central swing arms 91 realize lateral pushing, the paired left or right swing arms 92 realize auxiliary righting, the reverse operation is prevented, no idle stroke exists in the back-and-forth action,

the groove milling fixture machine 22 and the oil groove processing center 23 realize that oil hole drilling of a workpiece is simultaneously used as a groove milling process hole, and the bearing bush piece 24 is subjected to surface quenching or qualitative treatment or directly put in storage after the bearing bush output belt 25 is output and processed.

The fixture frame 93 is used as a reference, the fixture limiting baffle 94 realizes positioning, the fixture profiling telescopic seat 95 realizes feeding, the fixture lower pressing plate air cylinder 96 realizes clamping of a workpiece, the fixture profiling positioning arc-shaped groove 97 and the fixture transverse air cylinder 98 realize positioning of the workpiece, the fixture positioning or pushing air nozzle 99 realizes adsorption and outward pushing of the workpiece, automatic operation is realized, the fixture auxiliary lower support seat 100 realizes auxiliary righting in machining, and the stress of the fixture profiling telescopic seat 95 hydraulic cylinder is avoided.

The boring fixture machine 19 and the boring mark center 20 realize the inner hole processing and mark of the boring mark bearing bush piece 21.

The boring tool is supported by a tool rack 101, a boring tool rotary driving motor 102 realizes rotary boring driving, a lower auxiliary sleeve 103 of the boring tool realizes lower end fixing and centering, a boring tool radial supporting push rod 104, a boring tool radial supporting roller 105 realizes adjustment of centering pressure and reduces friction force through rolling, a main boring rod 106 of the boring tool is used as a reference, a boring tool double-edge tool 107 bores an inner hole, an upper auxiliary supporting component 108 of the boring tool realizes auxiliary centering of a hole after boring, a boring tool pairing marking laser head 109 is convenient to distinguish, and a boring tool lifting cylinder 110 realizes downward driving of a hole auxiliary centering tool and cutting.

The oil groove lifting cylinder 111 realizes downward driving, the oil groove drill head 117 processes oil holes and serves as a groove milling process hole, and the combined motion of the oil groove milling cutter rotating head 113, the oil groove milling cutter telescopic cylinder 114 and the oil groove milling cutter rotating motor 115 realizes oil groove processing.

The invention has the advantages of reasonable design, low cost, firmness, durability, safety, reliability, simple operation, time and labor saving, capital saving, compact structure and convenient use.

Claims

1. The utility model provides a processing axle bush oil line's oil groove machining center which characterized in that: comprises an oil groove lifting cylinder (111) which is arranged on a cutter frame (101) and is positioned on the left side of a boring mark center (20), a milling cutter seat is arranged on a piston rod at the lower end of the oil groove lifting cylinder (111), an oil groove milling cutter telescopic cylinder (114) is radially arranged on the milling cutter seat, an oil groove milling cutter rotating head (113) is arranged at the outer end part of the oil groove milling cutter telescopic cylinder (114), an oil groove milling cutter tool (112) for milling the groove of the boring mark bearing bush piece (21) is arranged on the oil groove milling cutter rotating head (113), an oil groove milling cutter rotating motor (115) for driving the milling cutter seat to rotate around a piston rod of the oil groove lifting cylinder (111) is arranged on the oil groove lifting cylinder (111), an oil groove drill head (117) is arranged at the lower end of the milling cutter seat, and an oil groove drill cutter (116) used for drilling the boring mark bearing bush piece (21) is horizontally arranged on the oil groove drill head (117).

2. The utility model provides a bearing bush high accuracy oil line processing equipment which characterized in that: comprises that

A pairing deviator (18) for allocating the chamfer bearing bush pieces (17) as pairs of bore marking bearing bush pieces (21) to be machined;

a machining part for bore marking and oil groove machining of a bore marking shoe (21), comprising

A boring mark center (20) for boring and marking the bearing bush piece (21) to be processed,

A boring clamp machine (19) which is connected with the receiving matching direction-changing machine (18) in a working procedure and feeds materials to a boring marking center (20),

A groove machining center (23) as claimed in claim 1, for machining bore marking shoe parts (21) into machined shoe parts (24),

A groove milling fixture machine (22) which is connected with the boring fixture machine (19) and feeds materials to the oil groove processing center (23),

And a bearing bush output belt (25) for outputting the machined bearing bush piece (24) output by the groove milling fixture machine (22).