CN116728127A - Hub bearing drilling and tapping clamp and machining method - Google Patents

Abstract

The application relates to the technical field of hub bearing machining, and particularly discloses a hub bearing drilling and tapping clamp which comprises a plurality of clamping blocks capable of approaching to the center of a hub bearing, wherein the clamping blocks are used for clamping on the periphery of a flange of the hub bearing, and also comprise support columns used for supporting the flange of the hub bearing, and the contact positions of the support columns and the flange avoid the positions needing to be perforated on the flange; and a positioning piece for limiting the circumferential rotation of the hub bearing. A processing method for drilling and tapping of a hub bearing requires that a workpiece is clamped by a hub bearing drilling and tapping clamp, a positioning piece can be pressed at a non-processing position on the upper surface of a flange, and the processing method further comprises the following processing steps: s1, machining hole sites; s2, chamfering the bottom end of the hole by inserting a hook into the hole site from top to bottom. The scheme is used for solving the problems that the machining precision of the flange of the existing hub bearing in the machining of drilling and tapping is difficult to ensure and the surface of the barrel column section of the inner ring of the hub bearing is easy to clamp.

Description

Hub bearing drilling and tapping clamp and machining method

Technical Field

The application relates to the technical field of hub bearing machining, in particular to a hub bearing drilling and tapping clamp and a machining method.

Background

The main function of the hub bearing is bearing, which is an indispensable part on the automobile, the hub bearing comprises an inner ring, a small inner ring, an outer ring, rolling bodies and a retainer, two rows of raceways are arranged on the outer ring, one row of raceways are respectively arranged on the inner ring and the small inner ring, and the rolling bodies are positioned in the raceways under the action of the retainer and move in the raceways when the inner ring and the outer ring of the hub bearing rotate relatively.

When the hub bearing is used, the hub bearing needs to be connected with a rim, a brake disc and a knuckle, so that drilling and tapping are needed on an inner ring flange and/or an outer ring flange of the hub bearing, the inner ring flange or the outer ring flange of the hub bearing needs to be clamped by a clamp for ensuring the machining precision of drilling and tapping, for example, the clamp for machining the hub bearing with the patent publication number of CN210997688U is used for clamping the inner ring of the hub bearing so as to conveniently carry out hole machining or polishing machining on the hub bearing, and a plurality of clamping blocks on the clamp are mutually close to each other to enclose and tightly support a cylindrical column section of the inner ring of the hub bearing during clamping.

However, the existing clamping mode is that the inner ring of the hub bearing is clamped only by virtue of the circumferential clamping blocks, however, on the flange of the hub bearing, the number of hole sites needing to be machined is more, the specification is not only one, when the hole sites are machined, the next specification of hole site machining is carried out by changing a cutter after the hole sites are machined according to the same specification, each hole is eccentrically arranged on the inner ring of the hub bearing, when the hole sites are machined, the stress of the inner ring of the hub bearing is uneven, and the machining precision requirement of the hole sites is difficult to guarantee only by virtue of the circumferential clamping of a plurality of clamping blocks on the cylindrical section of the hub bearing.

In order to ensure the machining precision in the drilling and tapping processes, the clamping force of the clamping blocks on the inner ring barrel column section of the hub bearing has to be improved, but the probability of clamping damage to the surface of the barrel column section is increased when the clamping force is increased.

In addition, under the clamping of the existing clamp, scraps generated by machining the hole site of the inner ring of the hub bearing are easily accumulated on the clamping block, and the difficulty of cleaning the scraps is increased.

Disclosure of Invention

The application aims to provide a hub bearing drilling and tapping clamp for solving the problems that the machining precision of a flange of a hub bearing in the prior art is difficult to ensure in the process of drilling and tapping and the surface of a cylindrical section of an inner ring of the hub bearing is easy to be clamped and damaged.

In order to achieve the above purpose, the application adopts the following technical scheme:

the hub bearing drilling and tapping clamp comprises a plurality of clamping blocks which can approach the center of a hub bearing, wherein the clamping blocks are used for clamping the periphery of a flange of the hub bearing, and also comprise support columns for supporting the flange of the hub bearing, and the contact positions of the support columns and the flange avoid the positions needing to be perforated on the flange; and a positioning piece for limiting the circumferential rotation of the hub bearing.

The principle and the advantages of the scheme are as follows:

1. when the scheme is adopted, the clamping blocks for clamping the cylindrical section of the hub bearing are changed into the peripheries of the clamping flanges, compared with the clamping cylindrical section, the periphery of the flange is the position of the maximum outer diameter of the hub bearing, so that the contact area during clamping is greatly increased, the cylindrical section of the hub bearing is prevented from being damaged, the contact area during clamping is greatly increased, and the hub bearing is ensured to have larger clamping force during processing of the flange; in addition, the flange of the hub bearing is supported at the bottom by the supporting column and is circumferentially limited by the locating piece, so that the accuracy of hole position processing on the flange of the hub bearing can be guaranteed under the conditions of larger clamping force, bottom support and circumferential limitation even though the drilling and tapping hole position on the flange of the hub bearing is eccentrically processed.

2. The grip block centre gripping of this scheme is in flange periphery, compare the condition of centre gripping at section of thick bamboo post, because to hub bearing inner circle, its section of thick bamboo post section surface is the raceway place face and with little inner circle's mating surface, so after the clamp trails this surface, can cause great influence to hub bearing's performance, and this scheme centre gripping is on the flange periphery that requires lowly to external surface quality, the high section of thick bamboo post section periphery of surface accuracy has been guaranteed and is not influenced by processing, and then avoided section of thick bamboo post section to be pressed from both sides the possibility of damaging, simultaneously because of the centre gripping is when on the flange periphery, the area of contact when the centre gripping is bigger, the clamping dynamics is bigger and more steady, the probability that the flange periphery was pressed from both sides to the grip block clamp has also been reduced.

3. According to the scheme, the contact position of the support column and the flange avoids the position of the opening, so that the processing of the hole site on the flange is not influenced by the support column, the hole site processing is ensured on the basis of ensuring high precision, and the processing efficiency is ensured.

Preferably, as an improvement, the support column is hollow, the top and the bottom are through holes, the hole site needing to be perforated on the flange is positioned in the hollow space of the support column, and the bottom through hole of the support column is communicated with a chip removal channel.

The beneficial effects are that: the sweeps that this scheme produced when making processing can directly fall to the cavity space of support column in the top through-hole of support column to enter into the chip removal passageway from the bottom through-hole in cavity space, finally follow chip removal passageway and discharge, avoided piling up of sweeps on anchor clamps.

Preferably, as an improvement, the device further comprises an annular seat and a barrel claw positioned in the annular seat, wherein the barrel claw comprises a connecting ring and a plurality of elastic clamping jaws circumferentially and uniformly distributed on the connecting ring, each elastic clamping jaw is provided with a clamping block, the elastic clamping jaws are matched with the annular seat through inclined planes, and when the connecting ring vertically moves, the elastic clamping jaws can move along the inclined planes.

The beneficial effects are that: according to the scheme, through the arrangement of the annular seat with the inclined plane, the barrel claw moves vertically in the whole mode, namely, the elastic clamping jaw can move on the inclined plane, so that the clamping block is forced to be far away from or close to the flange of the hub bearing, and the loosening or clamping of the flange of the hub bearing is achieved.

Preferably, as an improvement, the chip removing device further comprises a chip removing cylinder positioned below the supporting column, wherein the chip removing cylinder forms a chip removing channel, the chip removing cylinder can move vertically, and the chip removing cylinder is fixedly connected with the connecting ring.

The beneficial effects are that: according to the chip removal barrel capable of vertically moving, the connecting ring can be driven to vertically move, namely, whether the clamping block is clamped or not is controlled, the chip removal channel is formed, the waste chips are conveniently discharged, and falling of the waste chips hung on the inner wall of the chip removal barrel can be facilitated in the vertical moving process.

Preferably, as an improvement, the chip removing device further comprises an annular positioning seat, the chip removing cylinder penetrates through the annular positioning seat, an annular groove surrounding the chip removing cylinder is formed in the annular positioning seat, a closed cavity is formed between the annular groove and the chip removing cylinder, a piston is fixed on the periphery of the chip removing cylinder, the piston is vertically and slidingly connected to the annular groove and divides the cavity into two independent cavities, and each cavity is communicated with a runner.

The beneficial effects are that: according to the scheme, the pressure in the upper chamber and the pressure in the lower chamber are controlled through the flow channels of the upper chamber and the lower chamber, so that vertical lifting control of the chip cartridge with the piston is realized, whether the clamping block is clamped or not is guaranteed through lifting control, the chip removal requirement of the chip cartridge is met, the space of the whole clamp is not increased, the clamp is compact in structure and small in occupied area, more drilling and tapping clamps are mounted on a workbench of a numerical control machine tool with the same size, the number of workpieces processed at one time is increased, and the processing efficiency and the consistency of the processing quality of the workpieces are improved.

Preferably, as an improvement, the chip removal cylinder is fixedly connected with a pull plate, the pull plate and the connecting ring are positioned on the upper side and the lower side of the annular positioning seat, a connecting rod is fixedly connected between the pull plate and the connecting ring, and the connecting rod is vertically and slidably connected on the annular positioning seat.

The beneficial effects are that: the technical scheme has the advantages that the connecting structure is simple, the annular positioning seat realizes the guiding of the vertical movement of the connecting rod, the vertical movement stability of the barrel claw is higher, and the service life of the barrel claw is prolonged.

Preferably, as an improvement, the annular positioning seat comprises an upper cylindrical section and a lower cylindrical section, the outer diameter of the lower cylindrical section is larger than that of the upper cylindrical section, the lower cylindrical section is partially embedded into the annular seat, an annular gap between the annular seat and the upper cylindrical section is used for accommodating the connecting ring, an upward opening weight-reducing groove is formed in the annular seat, and the weight-reducing groove and the clamping blocks are distributed in a circumferential staggered mode in the annular seat.

The beneficial effects are that: the upper and lower cylindrical sections of the annular positioning seat are arranged, so that shielding of the lower cylindrical section of the annular positioning seat is realized through the annular seat, waste scraps are prevented from falling between the annular seat and the lower cylindrical section of the annular positioning seat, and the annular positioning seat is dustproof and protective; the weight reduction groove formed in the annular seat reduces the weight of the annular seat, and enables scraps which do not timely fall from the processing hole site to fall onto the weight reduction groove from the empty areas on two sides of the clamping block, so that accumulation of the scraps on the clamping block is avoided; in addition, the lifting action of the connecting ring is also beneficial to pushing out the scraps accumulated on the connecting ring and the weight reducing groove.

Preferably, as a modification, the bottom through hole of the support column is a conical hole, and the small-size end of the conical hole is close to the chip removal channel.

The beneficial effects are that: this scheme makes the sweeps in can follow the cavity space of support column in time along the bell mouth whereabouts to the chip removal section of thick bamboo, makes things convenient for the timely discharge of sweeps, simultaneously, also satisfies the support column of different specifications and installs on annular positioning seat after, in can in time fall into the chip removal section of thick bamboo with the sweeps through the bell mouth.

The application also provides a processing method for drilling and tapping the hub bearing, which needs to clamp a workpiece by using the hub bearing drilling and tapping clamp, wherein the positioning piece can be pressed on a non-processing position on the upper surface of the flange, and the processing method further comprises the following processing steps:

s1, machining hole sites;

s2, chamfering the bottom end of the hole by inserting a hook into the hole site from top to bottom.

Preferably, as a modification, the hub bearing drilling and tapping clamp has a plurality of hub bearing drilling and tapping clamps, and the plurality of hub bearing drilling and tapping clamps are arranged on the same workbench.

The beneficial effects of the application are as follows:

1. according to the application, when the flange of the hub bearing is clamped by the clamping block, the support column supports the flange from the bottom of the flange, the positioning piece compresses and limits the circumferential rotation of the flange from the upper side of the flange, and the contact positions of the support column and the positioning piece with the flange avoid the hole site to be machined, so that the hook knife can extend to the lower side of the bottom end of the hole on the basis that the upper, lower, left and right directions of the hub bearing are completely limited, and further, the chamfering operation of the bottom end of the hole site is completed under the condition that the flange of the hub bearing is not required to be overturned, the machining efficiency is improved, the repositioning and alignment of a workpiece are avoided after the workpiece is overturned, and the chamfering machining quality is ensured.

2. According to the application, the structure design of the hub bearing drilling and tapping clamp is compact, so that a plurality of clamps can be installed on the workbench of a numerical control machine tool, a plurality of hub bearings on the clamps can be conveniently machined, the practical verification is carried out, only 2 clamps can be installed on the original workbench, after the design improvement of the hub bearing drilling and tapping clamp is carried out, the number of the clamps which can be placed on the original workbench is up to 6, the number is far beyond the expected number, the machining efficiency is greatly improved, and the productivity of enterprises is greatly improved.

Drawings

Fig. 1 is a schematic three-dimensional structure of a hub bearing drilling and tapping jig according to an embodiment of the present application.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a rotational cross-sectional view of A-A in fig. 2.

Fig. 4 is a B-B rotational cross-sectional view of fig. 2.

Fig. 5 is a schematic view of a partial explosion of a hub bearing drilling and tapping fixture according to an embodiment of the present application.

FIG. 6 is a top cross-sectional view of a fixture in a hub bearing drilling and tapping fixture according to an embodiment of the present application.

FIG. 7 is a schematic three-dimensional structure of six hub bearing drilling and tapping fixtures mounted on the same table according to an embodiment of the present application.

Fig. 8 is a top view of fig. 7.

Fig. 9 is a front cross-sectional view of fig. 7.

FIG. 10 is a schematic structural diagram of a machining method for chamfering a hole bottom end of an inner race of a hub bearing according to an embodiment of the present application.

Detailed Description

The following is a further detailed description of the embodiments:

reference numerals in the drawings of the specification include: the jig comprises a workbench 100, a jig main plate 101, a first main channel 1011, a second main channel 1012, a workbench body 102, a rib plate 103, a chip removal guide plate 104, a hub bearing inner ring 10, an annular seat 1, a weight reduction groove 11, a barrel claw 2, an elastic clamping jaw 21, a clamping block 211, a connecting ring 22, a limiting piece 221, a connecting rod 23, a supporting column 3, an annular positioning seat 4, an end cover 41, a mounting hole 42, a first flow channel 43, a second flow channel 44, an upper cavity 401, a lower cavity 402, a pull plate 5, a chip removal barrel 6, a piston 61, an annular sleeve plate 7, a positioning piece 8, a mounting seat 81, a spring 82, a baffle 83, a hook 9, an extension rod 91 and a hub bearing drilling tapping jig 200.

As shown in fig. 1 to 10, a method for drilling, tapping and chamfering a flange of a hub bearing inner ring 10 by using a numerical control machine tool is provided, a plurality of hub bearing drilling and tapping jigs 200 are required, specifically, a plurality of hub bearing drilling and tapping jigs 200 are mounted on a workbench 100 of the numerical control machine tool, each hub bearing drilling and tapping jig 200 is used for fixedly clamping one hub bearing inner ring 10, and the specific structure of the hub bearing drilling and tapping jigs 200 is as follows:

referring to fig. 1 to 6, the hub bearing drilling and tapping jig 200 includes an annular seat 1, a cylindrical claw 2, a support column 3, an annular positioning seat 4, and a positioning member 8. The annular seat 1 and the annular positioning seat 4 are fixed on the workbench 100 through screws. The annular positioning seat 4 is matched with the cylindrical claw 2 and is used for enabling the cylindrical claw 2 to clamp the periphery of the flange of the hub bearing inner ring 10, and the supporting column 3 is used for supporting the hub bearing inner ring 10 from the bottom of the flange of the hub bearing inner ring 10; the annular positioning seat 4 is used for fixedly mounting the fixed support column 3, and the positioning piece 8 is used for circumferentially limiting and compacting the flange of the hub bearing inner ring 10 from the upper side of the flange of the hub bearing inner ring 10.

The barrel claw 2 is located in the annular seat 1, the barrel claw 2 comprises an integrally formed connecting ring 22 and a plurality of elastic clamping jaws 21 circumferentially uniformly distributed on the connecting ring 22, each elastic clamping jaw 21 comprises a thin-wall section integrally formed with the connecting ring 22 and a chuck located at the free end of the thin-wall section, each chuck of each elastic clamping jaw 21 is provided with a clamping block 211 through a screw, the elastic clamping jaws 21 are matched with the annular seat 1 through inclined planes, and when the connecting ring 22 moves vertically, the elastic clamping jaws 21 can move along the inclined planes.

The annular positioning seat 4 comprises an upper cylindrical section and a lower cylindrical section which are integrally formed, the outer diameter of the lower cylindrical section is larger than that of the upper cylindrical section, the lower cylindrical section is partially embedded into the annular seat 1, an annular gap between the annular seat 1 and the upper cylindrical section is used for accommodating the connecting ring 22, the annular seat 1 is provided with an upward opening weight-reducing groove 11, and the weight-reducing groove 11 and the clamping blocks 211 are distributed in a staggered mode in the circumferential direction of the annular seat 1.

The connecting ring 22 of the barrel claw 2 is fixed with a connecting rod 23 downwards at the bottom, the connecting rod 23 is vertically connected to the annular locating seat 4 in a sliding manner, in this embodiment, the connecting rod 23 penetrates through the bottom end fixedly connected with pulling plate 5 of the annular locating seat 4, and through the vertical movement of the pulling plate 5, the connecting rod 23 is driven to vertically and stably move along the annular locating seat 4, and then the connecting ring 22 is driven to vertically move, in the vertical movement process, the elastic clamping claws 21 move along the inclined plane of the annular seat 1, so that the clamping blocks 211 on the elastic clamping claws 21 are mutually close to or mutually far away from each other.

The support column 3 is fixed on the upper cylindrical section of the annular positioning seat 4 through screws, a plurality of rows of mounting holes 42 are machined in the upper cylindrical section of the annular positioning seat 4, each row of mounting holes 42 are arranged along the radial direction of the hub bearing inner ring 10, and the mounting holes 42 positioned on different circumferences can correspondingly install different support columns 3. The contact position of support column 3 and flange avoids the position that needs the trompil on the flange, specifically, the inside cavity of support column 3 and top and bottom are the through-hole, and the hole site that needs the trompil on the flange is located the cavity space of support column 3, and the bottom through-hole of support column 3 is the bell mouth, and the aperture of bell mouth is more far away from hub bearing inner race 10 and then the aperture is less. The bottom through hole of the support column 3 is communicated with a chip removal channel.

The vertical sliding connection in middle part of annular positioning seat 4 has chip removal section of thick bamboo 6, and the bottom of chip removal section of thick bamboo 6 runs through annular positioning seat 4, and chip removal section of thick bamboo 6 top and the bottom through-hole intercommunication of support column 3 are equipped with annular sleeve plate 7 between chip removal section of thick bamboo 6 and the support column 3, and annular sleeve plate 7 passes through the fix with screw on annular positioning seat 4, and the chip inlet end processing of annular sleeve plate 7 has the guide inclined plane, and annular sleeve plate 7 covers on chip removal section of thick bamboo 6, and annular sleeve plate 7 is shielded the chip removal section of thick bamboo, makes things convenient for the sweeps to fall fast to in the chip removal section of thick bamboo 6 simultaneously, forms the chip removal passageway of support column 3 bottom through annular sleeve plate 7 and chip removal section of thick bamboo 6.

The pull plate 5 is fixed on the periphery of a section of the bottom of the chip removal barrel 6, so that the pull plate 5 can synchronously lift with the chip removal barrel 6.

The annular positioning seat 4 is provided with an annular groove surrounding the chip removal barrel 6, a closed cavity is formed between the annular groove and the chip removal barrel 6, a piston 61 is fixed on the periphery of the middle part of the chip removal barrel 6, the piston 61 is vertically and slidably connected to the annular groove and divides the cavity into two independent chambers, the annular positioning seat 4 is provided with a first flow channel 43 and a second flow channel 44, the first flow channel 43 is communicated with the upper chamber 401, and the second flow channel 44 is communicated with the lower chamber 402.

The workbench 100 is provided with a first main channel 1011 and a second main channel 1012, each of the first main channel 1011 and the second main channel 1012 is communicated with a plurality of branch channels, each branch channel of the first main channel 1011 is communicated with a first channel 43 of a positioning disk of one of the hub bearing drilling and tapping fixtures 200, and each branch channel of the second main channel 1012 is communicated with a second channel 44 of a positioning disk of one of the hub bearing drilling and tapping fixtures 200.

The primary channel I1011 and the primary channel II 1012 on the workbench 100 are used for conveying hydraulic oil to each hub bearing drilling and tapping clamp 200 and refluxing oil in the hub bearing drilling and tapping clamp 200, so that synchronous movement of the chip cylinders 6 with the pistons 61 on all clamps is conveniently controlled by oil conveying or oil returning of the primary channel I1011 and the primary channel II 1012, the control cost is reduced, and all clamp structures on the whole workbench 100 are more compact.

In this embodiment, in order to ensure the tightness of the cavity, sealing rings are installed above and below the annular groove, and in order to ensure the formation of the annular groove and the installation simplicity of the chip removal cylinder 6 with the piston 61, a detachable end cover 41 is installed at the bottom end of the annular positioning seat 4, the end cover 41 is sleeved outside the chip removal cylinder 6, and sealing rings are arranged between the end cover 41 and the annular positioning seat 4 and between the end cover 41 and the chip removal cylinder 6.

In this embodiment, in order to avoid the excessive downward movement of the chip removing cylinder 6, the clamping force of the clamping block 211 on the hub bearing inner ring 10 is excessive, the connecting ring 22 is provided with the limiting member 221, and the bottom of the limiting member 221 protrudes out of the bottom surface of the connecting ring 22 and can abut against the upper surface of the annular positioning seat 4, in this embodiment, the limiting member 221 is a limiting screw.

The locating piece 8 is horizontally and slidably connected to the fixing base 81, the fixing base 81 is fixed to the workbench 100, a spring 82 is installed between the fixing base 81 and the locating piece 8, the extending direction of the spring 82 is parallel to the radial direction of the hub bearing inner ring 10, the spring 82 is used for pushing the locating piece 8 out towards the hub bearing inner ring 10, specifically, a blind hole is formed in the locating piece 8 along the radial direction of the hub bearing inner ring 10, a spring 82 extending out of the blind hole is installed in the blind hole, a baffle 83 is fixed to the fixing base 81, the baffle 83 faces the blind hole, the spring 82 is located between the baffle 83 and the bottom of the blind hole, the locating piece 8 is horizontally and slidably connected to the fixing base 81, and the sliding direction of the locating piece 8 is parallel to the radial direction of the hub bearing inner ring 10.

Referring to fig. 7 to 9, in order to ensure that scraps generated during the machining process are removed in time, the workbench 100 is optimized and improved, the workbench 100 comprises a clamp main board 101, a workbench body 102 and a plurality of rib plates 103 arranged between the clamp main board 101 and the workbench body 102, and an annular seat 1 and an annular positioning seat 4 of all hub bearing drilling and tapping clamps 200 are fixed on the clamp main board 101, so that the clamp main board 101 and all hub bearing drilling and tapping clamps 200 on the clamp main board form a whole, and the installation and the disassembly on the workbench body 102 are convenient. The rib plate 103 enables a hollowed space to be formed between the clamp main plate 101 and the workbench 100, chip discharging holes opposite to the chip discharging barrel 6 are formed in the clamp main plate 101, inclined chip discharging guide plates 104 are mounted below the chip discharging holes, and the inclined downward ends of the chip discharging guide plates 104 extend to the outside of the workbench body 102, so that waste chips are discharged to the outside of the workbench 100 along the chip discharging guide plates 104 after falling from the chip discharging barrel 6.

The processing method for drilling and tapping the hub bearing specifically comprises the following steps:

firstly, hydraulic oil is injected into the main channel II 1012, so that the main channel I1011 is used for oil return, the hydraulic oil on the main channel II 1012 enters the second flow channel 44 of the annular positioning seat 4 on each clamp through each branch flow channel on the main channel II, and finally enters the lower cavity 402 of the clamp, so that the lower cavity 402 is full of oil to promote the chip removing cylinder 6 to move upwards, the chip removing cylinder 6 drives the elastic clamping jaw 21 to move upwards through the pull plate 5 and the connecting rod 23, and the clamping blocks 211 fixed on the elastic clamping jaw 21 move outwards under the elastic action, so that space is provided for placing the inner ring 10 of the hub bearing.

And secondly, placing the hub bearing inner rings 10 on the support columns 3 of the clamps, and controlling the positioning pieces 8 before placing, so that the positioning pieces 8 are far away from the center of the clamps, and avoiding the positioning pieces 8 from interfering the hub bearing inner rings 10.

Thirdly, placing the hub bearing inner ring 10 to be processed on the support column 3, and after the placement is completed, loosening control on the positioning piece 8, so that the positioning piece 8 radially moves under the action of the spring 82 and abuts against the convex position on the upper surface of the flange of the hub bearing inner ring 10, and downward pressing and circumferential limiting of the hub bearing inner ring 10 are formed.

Fourth, hydraulic oil is injected into the first main channel 1011 to enable the second main channel 1012 to be used for oil return, the hydraulic oil on the first main channel 1011 enters the first flow channel 43 of the annular positioning seat 4 on each clamp through each branch flow channel thereon, and finally enters the upper cavity 401 of the clamp, so that the upper cavity 401 is full of oil to enable the chip removing cylinder 6 to move downwards, the chip removing cylinder 6 moves downwards to drive the pull plate 5, the connecting rod 23 and the connecting ring 22 to synchronously move downwards, the elastic clamping jaw 21 moves along the inclined plane of the annular seat 1, and the clamping block 211 is close to the hub bearing inner ring 10 to clamp the periphery of the flange of the hub bearing inner ring 10.

And fifthly, machining all holes of the clamped hub bearing inner ring 10, wherein when the holes are machined, the tools with the same specification are used for machining all holes with the same size of all the hub bearing inner rings 10 on the workbench 100, and then the tools are replaced to machine the holes with other specifications.

And sixthly, after the hole site is machined, tapping the hole site needing tapping, and chamfering the hole site needing chamfering. In the chamfering process, chamfering of the bottom end of the hole site is performed by adopting a bush-hook 9, specifically, as shown in fig. 10, the bush-hook 9 is fixed on an extension bar 91, the extension bar 91 is fixed on a cutter rotating output shaft of a numerical control machine tool, the extension bar 91 with the bush-hook 9 is inserted into the hole from top to bottom, the bush-hook 9 at the bottom end of the extension bar 91 is contacted with the bottom end of the hole, and the cutter rotating output shaft drives the extension bar 91 to rotate so as to drive the bush-hook 9 to achieve chamfering of the bottom end of the hole.

In the embodiment, the clamping blocks 211 for clamping the cylindrical section of the hub bearing inner ring 10 are changed to the periphery of the clamping flange, so that the cylindrical section of the hub bearing inner ring 10 is prevented from being damaged by clamping, the contact area during clamping is greatly increased, and the hub bearing inner ring 10 is ensured to have larger clamping force during flange machining; in addition, the flange of the hub bearing inner ring 10 is supported by the support column 3 in a ring shape at the bottom and is limited by the locating piece 8 from the circumference of the top, so that the accuracy of the hole site machining on the hub bearing flange can be ensured under the conditions of larger clamping force, bottom support and circumferential limitation of the top even though the hole site on the flange is eccentric.

In addition, most of the scraps generated in the processing process of the embodiment fall into the hollow space of the support column 3 from the processing hole position of the flange, then pass through the conical hole at the bottom of the support column 3, the guide inclined plane of the annular sleeve plate 7, the chip discharging barrel 6 and the chip discharging hole, finally, the scraps are discharged out of the workbench 100 from the chip discharging guide plate 104, part of the scraps fall into the space formed by the weight reducing groove 11, only a few of the scraps stay on the upper surface of the clamping block 211 and the upper surface of the flange of the hub bearing inner ring 10, so that the timely discharge of the machining scraps is realized, and the probability that the scraps are accumulated on the clamping block 211 or the flange of the hub bearing inner ring 10 is reduced.

In addition, the setting of the positioning disc and the chip removal barrel 6 in this embodiment makes this embodiment on the basis of satisfying the stable support, stable clamping and timely chip removal of the workpiece, and also makes the structure of each hub bearing drilling and tapping fixture 200 very compact, is favorable to installing more fixtures on the workstation 100 of the existing numerical control machine tool, so as to reduce the frequency of tool changing and improve the machining efficiency. In this embodiment, only 2 hub bearing drilling and tapping fixtures 200 can be installed on the original workbench 100, after improvement, 6 hub bearing drilling and tapping fixtures 200 can be installed, and by improving the processing method, chamfering of the bottom end of the hole site is not required to be processed again by overturning the workpiece, so that the production efficiency of enterprises is greatly improved, and the productivity of the enterprises is improved.

The foregoing is merely exemplary of the present application, and specific technical solutions and/or features that are well known in the art have not been described in detail herein. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present application, and these should also be regarded as the protection scope of the present application, which does not affect the effect of the implementation of the present application and the practical applicability of the patent. The protection scope of the present application is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims (10)

1. The utility model provides a hub bearing drilling tapping anchor clamps, includes a plurality of grip blocks that can be close to hub bearing center, its characterized in that: the clamping block is used for clamping the periphery of the flange of the hub bearing and also comprises a support column for supporting the flange of the hub bearing, and the contact position of the support column and the flange avoids the position of the flange, which needs to be perforated; and a positioning piece for limiting the circumferential rotation of the hub bearing.

2. The hub bearing drilling and tapping jig of claim 1, wherein: the support column is hollow, the top and the bottom of the support column are through holes, the hole site needing to be perforated on the flange is located in the hollow space of the support column, and the bottom through hole of the support column is communicated with a chip removal channel.

3. The hub bearing drilling and tapping jig of claim 2, wherein: still include annular seat and be located the section of thick bamboo claw of annular seat, a section of thick bamboo claw includes go-between and circumference equipartition a plurality of elasticity clamping jaw on the go-between, all installs the grip block on every elasticity clamping jaw, and elasticity clamping jaw passes through inclined plane cooperation with annular seat, and when the go-between vertically removed, elasticity clamping jaw can follow the inclined plane and remove.

4. A hub bearing drilling and tapping jig according to claim 3, wherein: the chip removing device further comprises a chip removing cylinder positioned below the supporting column, the chip removing cylinder forms a chip removing channel, the chip removing cylinder can vertically move, and the chip removing cylinder is fixedly connected with the connecting ring.

5. The hub bearing drilling and tapping jig of claim 4, wherein: the chip removing cylinder is arranged on the annular positioning seat, a closed cavity is formed between the annular groove and the chip removing cylinder, a piston is fixed on the periphery of the chip removing cylinder, the piston is vertically connected to the annular groove in a sliding mode and divides the cavity into two independent cavities, and each cavity is communicated with a runner.

6. The hub bearing drilling and tapping jig of claim 5, wherein: the chip removal cylinder is fixedly connected with a pulling plate, the pulling plate and the connecting ring are positioned on the upper side and the lower side of the annular positioning seat, a connecting rod is fixedly connected between the pulling plate and the connecting ring, and the connecting rod is vertically and slidably connected on the annular positioning seat.

7. The hub bearing drilling and tapping jig of claim 6, wherein: the annular positioning seat comprises an upper cylindrical section and a lower cylindrical section, the outer diameter of the lower cylindrical section is larger than that of the upper cylindrical section, the lower cylindrical section is partially embedded into the annular seat, an annular gap between the annular seat and the upper cylindrical section is used for accommodating the connecting ring, an upward opening weight-reducing groove is formed in the annular seat, and the weight-reducing groove and the clamping blocks are distributed in the circumferential direction of the annular seat in a staggered manner.

8. The hub bearing drilling and tapping jig of claim 2, wherein: the bottom through hole of support column is the bell mouth, and the small-size end of bell mouth is close to the chip removal passageway.

9. A method of machining a hub bearing bore tap, wherein a workpiece is clamped by a hub bearing bore tap clamp as claimed in any one of claims 1 to 8, the locating member being capable of being pressed into a non-machining position on the upper surface of the flange, the method further comprising the steps of:

s1, machining hole sites;

s2, chamfering the bottom end of the hole by inserting a hook into the hole site from top to bottom.

10. The method of machining a hub bearing drill tap of claim 9, wherein: the hub bearing drilling and tapping clamp is multiple, and the multiple hub bearing drilling and tapping clamps are installed on the same workbench.