CN210549681U

CN210549681U - Clamping device and machining center

Info

Publication number: CN210549681U
Application number: CN201921468159.0U
Authority: CN
Inventors: 张来民; 吴春宇; 王琛; 李亚聪; 张宝东; 张允�; 陈宝华; 安鑫; 刘昌盛
Original assignee: SHENYANG MACHINE TOOL COMPLETE SET EQUIPMENT CO Ltd
Current assignee: SHENYANG MACHINE TOOL COMPLETE SET EQUIPMENT CO Ltd
Priority date: 2019-09-05
Filing date: 2019-09-05
Publication date: 2020-05-19
Anticipated expiration: 2029-09-05

Abstract

The utility model relates to a vehicle front axle processing equipment technical field especially relates to a clamping device and machining center. The clamping device comprises a positioning plate, a clamping piece, a first through hole and a second through hole, wherein the clamping piece, the first through hole and the second through hole are arranged on the positioning plate; the first through hole is used for enabling a main shaft of the spindle box to extend into and machining the end face of a main pin hole of the front shaft in the first through hole; and the second through hole is used for enabling a main shaft of the main shaft box to extend into and machining a plate spring face threaded hole and a plate spring face through hole of the front shaft in the second through hole. The machining center comprises the clamping device. The clamping device and the machining center can contain all machining contents of the front shaft, and machining efficiency and machining precision of the front shaft are improved.

Description

Clamping device and machining center

Technical Field

The utility model relates to a vehicle front axle processing equipment technical field especially relates to a clamping device and machining center.

Background

The front axle of vehicle is also called the I-beam, and both ends are fist portion, and the king pin hole has all been seted up at both ends, are connected with the knuckle through the king pin hole, and the mid portion is the leaf spring face, is provided with the leaf spring face screw hole and the leaf spring face through-hole that are used for connecting the frame on the leaf spring face. The main procedures of the front shaft in the metal cutting process include rough and finish milling of the end face of the main pin hole, drilling, expanding and boring of the main pin hole, milling and drilling of two side faces, drilling, tapping, chamfering and the like of the plate spring face.

Because most of front axles require that all four sides of the front axles have processing contents, the traditional processing equipment cannot deal with the processing contents of the four sides of the front axles, and therefore, the processing equipment is usually adopted for sequential processing, namely, the front axles are transferred, clamped and processed for many times among different equipment through the common cooperation of a plurality of processing equipment, all the processing contents can be completed, and the processing precision is difficult to guarantee. The existing clamping equipment cannot deal with all processing contents of the front shaft even through clamping once.

Therefore, a clamping device which can be matched with all processing contents of the front shaft is urgently needed at present.

SUMMERY OF THE UTILITY MODEL

A first object of the utility model is to provide a clamping device to overcome the technical problem of the unable all processing contents of reply front axle of clamping of current clamping equipment to a certain extent.

A second object of the present invention is to provide a machining center, which can overcome the technical problem that the existing machining equipment can not deal with all the machining contents of the front axle to a certain extent.

In order to achieve the above object, the present invention provides the following technical solutions;

based on the first purpose, the utility model provides a clamping device for the front axle of fixed centre gripping vehicle, including location plate and set up clamping piece, first through-hole and the second through-hole on the location plate, the clamping piece is used for locking the front axle on the location plate, so that the main pinhole of front axle corresponds to the first through-hole and the leaf spring face screw hole of front axle corresponds to the second through-hole;

the first through hole is used for allowing a main shaft of the spindle box to extend into and machining the end face of a main pin hole of the front shaft in the first through hole; and the second through hole is used for enabling a main shaft of the spindle box to extend into the second through hole and machining a plate spring surface threaded hole of the front shaft.

In any of the above technical solutions, optionally, the clamping device further includes a first driving assembly and a second driving assembly, and the first driving assembly can drive the positioning plate to rotate around the first axis;

the second driving assembly can drive the positioning plate to reciprocate along a second direction; the second direction and the first axis are arranged at an included angle.

In any of the above technical solutions, optionally, the first driving assembly at least includes a first driving motor, and a driving rod of the first driving motor is fixedly connected to the positioning plate;

the second driving assembly comprises a second driving motor, a lead screw and a lead screw nut, the lead screw nut is fixedly connected with a driving rod of the second driving motor, the lead screw nut is in threaded connection with one end of the lead screw, and the other end of the lead screw can be rotatably connected with the positioning plate.

In any of the above technical solutions, optionally, the clamping device further includes a supporting block, the supporting block is disposed on the positioning plate, and the supporting block is configured to support the plate spring surface of the front axle.

Based on the second objective, the utility model provides a machining center, including frame, portal frame, processing unit, fourth drive assembly and clamping device as described in any one of the above technical schemes;

the portal frame, the first driving assembly and the second driving assembly are arranged on the rack;

the machining unit comprises a spindle box, a mounting frame and a third driving assembly, the spindle box and the third driving assembly are arranged on the mounting frame, and the third driving assembly can drive the spindle box to reciprocate on the mounting frame along a third direction;

the mounting frame and the fourth driving assembly are arranged on the portal frame, and the fourth driving assembly can drive the mounting frame to reciprocate on the portal frame along a fourth direction;

the second direction, the third direction, and the fourth direction define a three-dimensional space.

In any of the above technical solutions, optionally, the mounting frame includes a sliding plate, a saddle, and a fifth driving assembly, the saddle is connected to the gantry, the sliding plate is rotatably connected to the saddle about a second axis, and the second axis is parallel to the second direction;

the fifth driving component is arranged on the sliding saddle and can drive the sliding plate to rotate around the second axis within a preset angle;

the third driving assembly and the spindle box are arranged on the surface, facing away from the sliding saddle, of the sliding plate, and the third driving assembly can drive the spindle box to move back and forth on the sliding plate along the fourth direction.

In any of the above technical solutions, optionally, the fifth driving assembly includes an eccentric wheel, a driving shaft, a sliding rail, a sliding seat, and a driving device, the sliding rail and the driving device are disposed on the saddle, the sliding rail is movably disposed on the sliding seat, and a driving end of the driving device is connected to the sliding rail;

the driving shaft is fixedly connected with the inner ring of the eccentric wheel, and the other end of the driving shaft can be rotatably connected with the sliding rail; the sliding plate is provided with a connecting hole, the connecting hole is matched with the outer ring of the eccentric wheel, and the outer ring of the eccentric wheel and the inner ring of the eccentric wheel are eccentrically arranged;

the driving device can drive the slide rail to reciprocate along the fourth direction, and the axial direction of the driving shaft is parallel to and deviated from the second axis.

In any of the above technical solutions, optionally, a centering hole is formed in the sliding plate, a centering shaft is arranged on the saddle, the centering shaft is coaxially installed in the centering hole, and both the axes of the centering shaft and the centering hole are the second axis.

In any of the above technical solutions, optionally, the gantry includes two columns and a beam connected between the two columns, the beam extends along the second direction, and the mounting frame and the second driving assembly are disposed on the beam.

In any of the above technical solutions, optionally, the number of the processing units is two, the number of the fourth driving assemblies is two, and the two fourth driving assemblies are in one-to-one driving connection with the two processing units.

Adopt above-mentioned technical scheme, the beneficial effects of the utility model are that:

the utility model provides a clamping device can fix the front axle on the location plate through the clamping piece to supply machining center's headstock to process the front axle. In addition, through setting up first through-hole and second through-hole, avoid the locating plate to shelter from the main pin hole of front axle and the content of treating processing of leaf spring face. Simultaneously, through setting up first drive assembly and second drive assembly, make the locating plate can drive the front axle and remove and rotate to make the position of all faces of treating of front axle can both match with the position of the main shaft of headstock, make this clamping device just can deal with all processing contents of front axle through a clamping front axle, thereby be favorable to improving the machining efficiency and the machining precision of front axle. The utility model provides a machining center, including this clamping device, can realize all beneficial technological effects that this clamping device can realize.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a first structure of a machining center provided in an embodiment of the present invention;

fig. 2 is a second schematic structural diagram of the machining center provided in the second embodiment of the present invention;

fig. 3 is a schematic view of a third structure of the machining center provided in the second embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of the machining center of FIG. 3 at A;

fig. 5 is a schematic view of a first structure of a processing unit of a processing center according to a second embodiment of the present invention;

fig. 6 is a second schematic structural diagram of a processing unit of a processing center according to an embodiment of the present invention.

Icon: 1-a clamping device; 10-positioning the plate; 11-a clamping member; 12-a first via; 13-a second via; 14-a first drive assembly; 15-a second drive assembly; 16-a support block; 17-a first axis; 2-front axle; 20-king pin hole; 21-a leaf spring face; 22-threaded holes in the leaf spring faces; 3-a machining center; 30-a processing unit; 301-main spindle box; 302-a third drive assembly; 303-a saddle; 304-a sled; 305-a drive shaft; 306-an eccentric wheel; 307-a slide; 308-a slide rail; 309-a drive device; 310-a second axis; 31-a frame; 33-a fourth drive assembly; 34-upright column; 35-a cross beam; 36-automatic tool magazine.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

The clamping device provided by the embodiment is used for a machining center to fixedly clamp a front shaft of a vehicle.

As shown in fig. 1 to 6, and particularly in fig. 4, the clamping device 1 includes a positioning plate 10, and a clamping member 11, a first through hole 12, and a second through hole 13, which are provided on the positioning plate 10.

The clamp 11 is used to lock the front axle 2 to the positioning plate 10 such that the main pin hole 20 of the front axle 2 corresponds to the first through hole 12 and the plate spring face threaded hole 22 and the plate spring face through hole (not shown) of the front axle 2 correspond to the second through hole 13; the first through hole 12 is used for the spindle of the headstock 301 to extend into and machine the end face of the main pin hole 20 of the front shaft 2 in the first through hole. The second through hole 13 is for the spindle of the headstock 301 to extend into and machine the plate spring face screw hole 22 and the plate spring face through hole of the front shaft 2 in the second through hole. Because most of the front shafts 2 require machining contents on four surfaces, the clamping pieces 11 are used for locking the front shafts 2 on the positioning plate 10, and the machining requirements on other three surfaces of the front shafts 2 can be met; in addition, by making the main pin hole 20 of the front shaft 2 correspond to the first through hole 12 on the positioning plate member 10, and making the plate spring face threaded hole 22 and the plate spring face through hole of the front shaft 2 correspond to the second through hole 13 on the positioning plate member 10, it is convenient for the spindle of the headstock 301 to machine the end face of the main pin hole 20 on the surface of the front shaft 2 facing the positioning plate member 10 by protruding into the first through hole 12, and for the spindle of the headstock 301 to machine the plate spring face threaded hole 22 and the plate spring face through hole by protruding into the second through hole 13.

Optionally, the positioning plate 10 has an axisymmetric structure, the symmetry axis of the positioning plate 10 corresponds to the symmetry axis of the front axle 2, two first through holes 12 symmetrically disposed about the symmetry axis of the positioning plate 10 are disposed on the positioning plate 10, two second through holes 13 symmetrically disposed about the symmetry axis of the positioning plate 10 are further disposed on the positioning plate 10, the two first through holes 12 correspond to two main pin holes 20 of the front axle 2, and the two second through holes 13 correspond to two plate spring surface threaded holes 22 and two plate spring surface through holes of the front axle 2.

Alternatively, the fist of the front axle 2 does not protrude into the first through hole 12, or a part of the fist of the front axle 2 protrudes into the first through hole 12.

Alternatively, the clamping member 11 may be hydraulically driven to move away from or close to the positioning plate member 10, or may rotate around its axis to avoid or correspond to the positioning plate member 10, so as to facilitate the operation of detaching and attaching the front axle 2 from the positioning plate member 10.

The clamping device 1 in this embodiment can fix the front shaft 2 to the positioning plate 10 by the clamping member 11, so that the headstock 301 of the machining center 3 can machine the front shaft 2. In addition, by providing the first through hole 12 and the second through hole 13, the positioning plate member 10 is prevented from obstructing the main pin hole 20 of the front axle 2 and the contents to be processed of the plate spring surface 21. Meanwhile, by arranging the first driving assembly 14 and the second driving assembly 15, the positioning plate 10 can drive the front shaft 2 to move and rotate, so that the positions of all surfaces to be processed of the front shaft 2 can be matched with the position of the main shaft of the spindle box 301, all processing contents of the front shaft 2 can be dealt with by clamping the front shaft 2 once by the clamping device 1, and the processing efficiency and the processing precision of the front shaft 2 can be improved.

In an alternative of this embodiment, the clamping device 1 further includes a first driving assembly 14 and a second driving assembly 15, the first driving assembly 14 can drive the positioning plate 10 to rotate around the first axis 17, that is, the positioning plate 10 can be driven to turn by the first driving assembly 14, so that four surfaces of the front shaft 2 can face the main shaft of the headstock 301.

The second driving assembly 15 can drive the positioning plate 10 to reciprocate along the second direction; the second direction is arranged at an angle to the axis of the first axis 17 so that the relative positional relationship between the front shaft 2 and the spindle of the headstock 301 in the second direction can be adjusted for the same surface of the front shaft 2. As shown in fig. 1 and 3, the double-headed arrow b shows the course of the second direction.

That is to say, the positioning plate 10 can drive the front axle 2 to rotate around the first axis 17 and reciprocate along the second direction through the first driving assembly 14 and the second driving assembly 15, so that the degree of freedom of the clamping device 1 is improved, the matching degree of the clamping device 1 to the whole-process machining center 3 is further improved, and the machining flexibility of the front axle 2 is improved.

In an alternative of this embodiment, the first driving assembly 14 at least includes a first driving motor, and a driving rod of the first driving motor is fixedly connected to the positioning plate 10, so that the positioning plate 10 can be driven to rotate around the first axis 17 by the rotation of the driving rod of the first driving motor.

Optionally, the clamping device 1 further includes a rotating disc member, the rotating disc member is fixedly connected to the positioning plate member, and the first driving motor drives the rotating disc member to rotate, so as to drive the positioning plate member 10 to rotate around the first axis 17.

Optionally, a transmission is further disposed between the first driving motor and the positioning plate 10, so as to facilitate speed reduction and torque increase and improve the rotational stability of the positioning plate 10.

Optionally, the clamping device 1 further comprises a supporting frame supported below the positioning plate 10, the positioning plate 10 has a rotating shaft extending along the first axis 17, the rotating shaft of the positioning plate 10 is rotatably connected with the supporting frame, and the driving rod of the first driving motor is in driving connection with the rotating shaft of the positioning plate 10.

The second driving assembly 15 comprises a second driving motor, a screw rod and a screw nut, the screw nut is fixedly connected with a driving rod of the second driving motor, the screw nut rotates synchronously along with the driving rod of the second driving motor, the screw nut is screwed with one end of the screw rod, the screw nut rotates to enable the screw rod to be screwed in or screwed out relative to the screw nut, specifically, the rotating direction of the screw rod relative to the screw nut can be correspondingly changed by changing the rotating direction of the screw nut, the other end of the screw rod can be rotatably connected with the positioning plate 10, so that the screw rod is prevented from rotating and meanwhile the positioning plate 10 is driven to rotate, namely, the rotating motion of the screw rod is offset, the screw rod is transmitted to the positioning plate 10 along the extension of the second direction, and the positioning plate 10 moves along with the screw rod along the second direction. The linear driving along the second direction is realized by adopting the second driving motor and the lead screw, the structure is simple, the driving is stable, the displacement measurement is accurate, and the linear driving device is suitable for accurately processing the front shaft 2. Optionally, a bearing is provided between the other end of the lead screw and the positioning plate 10.

In an alternative of this embodiment, the clamping device 1 further comprises a support block 16, the support block 16 is provided on the positioning plate 10, and the support block 16 is used for supporting the plate spring surface 21 of the front axle 2. By arranging the supporting block 16, the direct contact area between the front shaft 2 and the positioning plate 10 can be reduced, and the unevenness of the contact surface can be avoided, so that the clamping device 1 can be more stably fixed on the front shaft 2; in addition, by changing the height of the supporting block 16, the distance between the front axle 2 and the positioning plate 10 can be adjusted, thereby improving the adaptability of the clamping device 1 to clamping of various front axles 2.

Example two

The second embodiment provides a machining center, the second embodiment comprises the clamping device in the first embodiment, the technical features of the clamping device disclosed in the first embodiment are also applicable to the second embodiment, and the technical features of the clamping device disclosed in the first embodiment are not repeatedly described.

Referring to fig. 1 to 6, fig. 1 is a first structural schematic diagram of a machining center provided in this embodiment; fig. 2 is a second schematic structural diagram of the machining center provided in this embodiment, specifically, a left side view of the machining center in fig. 1; fig. 3 is a schematic diagram of a third structure of the machining center provided in this embodiment, specifically, a top view of the machining center in fig. 1; to more clearly show the structure of the clamping device, fig. 4 is an enlarged view of a portion of the machining center provided in fig. 3 at a; fig. 5 is a schematic mechanism diagram of a processing unit of the processing center provided in the present embodiment; in order to more clearly show the mechanism of the machining unit, fig. 6 is a sectional view of the machining unit of the machining center provided in the present embodiment.

Referring to fig. 1 to 6, the machining center 3 provided in the present embodiment includes a rack 31, a gantry, a machining unit 30, a fourth driving assembly 33, and the clamping device 1 provided in the first embodiment.

The gantry, the first drive assembly 14 and the second drive assembly 15 are arranged on a frame 31. Optionally, the first drive assembly 14 and the second drive assembly 15 are located between two columns 34 of the gantry.

Alternatively, a worktable is arranged on the frame 31, the clamping device 1 is arranged on the worktable, and the second driving assembly 15 drives the worktable so that the clamping device 1 can reciprocate along the second direction on the frame.

The machining unit 30 comprises a spindle box 301, a mounting frame and a third driving assembly 302, wherein the spindle box 301 and the third driving assembly 302 are arranged on the mounting frame, and the third driving assembly 302 can drive the spindle box 301 to reciprocate on the mounting frame along a third direction; the mounting frame and the fourth driving assembly 33 are arranged on the portal frame, and the fourth driving assembly 33 can drive the mounting frame to reciprocate on the portal frame along the fourth direction. It is thereby possible to move the headstock 301 in both the third direction and the fourth direction. As shown in fig. 1 and 3, the double-headed arrow a shows the fourth direction, and the double-headed arrow c shows the third direction.

The second direction, the third direction and the fourth direction define a three-dimensional space, and optionally, the second direction is a front-rear direction of the frame 31, the third direction is an up-down direction of the frame 31, and the fourth direction is a left-right direction of the frame 31. That is, the headstock 301 and the front shaft 2 on the clamp device 1 can be relatively moved in the three-dimensional space, so that the front shaft 2 on the clamp device 1 can be machined at an arbitrary position in the three-dimensional space by the spindle of the headstock 301. That is, the machining center 3 has high-efficiency and high-flexibility machining capability, and is suitable for mass production of workpieces of the same type.

In an alternative of this embodiment, the mounting frame comprises a sliding plate 304, a saddle 303 and a fifth driving assembly, the saddle 303 is connected to the gantry, the sliding plate 304 is rotatably connected to the saddle 303 around a second axis 310, and the second axis 310 is parallel to the second direction; the fifth driving component is arranged on the saddle 303, and the fifth driving component can drive the sliding plate 304 to rotate around the second axis 310 in a preset angle; third drive assembly 302 and headstock 301 are both disposed on a surface of slide plate 304 facing away from saddle 303, and third drive assembly 302 is capable of driving headstock 301 to reciprocate in a third direction on slide plate 304. By providing the slide plate 304 and the fifth driving assembly, a position is provided for the third driving assembly 302 and a space is provided for the spindle box 301 to move back and forth along the third direction, and convenience is provided for the fifth driving assembly to drive the spindle box 301 to rotate around the second axis 310, so that the structure of the spindle box 301 assembly is more reasonable.

Since the axis of the king pin hole 20 of the front axle 2 is not generally perpendicular to the plate surface of the aligning plate member 10 but is inclined at a predetermined angle with respect to the perpendicular line of the aligning plate member 10, the spindle of the headstock 301 can be inclined at a predetermined angle by the fifth drive assembly, so that the inner hole and the end surface of the king pin hole 20 can be machined by the machining center 3 without re-clamping or replacing the machine tool due to machining of the king pin hole 20 of the front axle 2. That is to say, the machining center 3 can include all the machining contents of the front axle 2, the efficiency of the machining center 3 for machining the front axle 2 is improved, manual operation procedures are greatly reduced, and the improvement of the machining precision of the front axle 2 is facilitated.

Alternatively, the predetermined angle is determined in accordance with the inclination of the king pin hole 20 of the front axle 2, and the predetermined angle range is 0 ° or more and 12 ° or less. For example, the predetermined angle is 5 °, 8 °, 10 °, 12 °, or the like.

In an alternative of this embodiment, the fifth driving assembly includes an eccentric wheel 306, a driving shaft 305, a sliding seat 307, a sliding rail 308 and a driving device 309, the sliding rail 308 and the driving device 309 are disposed on the sliding saddle 303, the sliding rail 308 is movably disposed on the sliding seat 307, and a driving end of the driving device 309 is connected to the sliding rail 308; the driving shaft 305 is fixedly connected with the inner ring of the eccentric wheel 306, and the other end of the driving shaft 305 is rotatably connected with the sliding rail 308; the sliding plate 304 is provided with a connecting hole, the connecting hole is matched with the outer ring of the eccentric wheel 306, and the outer ring of the eccentric wheel 306 and the inner ring of the eccentric wheel 306 are eccentrically arranged; the driving device 309 can drive the slide rail 308 to move back and forth along a fourth direction, and the axial direction of the driving shaft 305 is parallel to and offset from the second axis 310. When the driving device 309 drives the sliding rail 308 to move forward along the fourth direction, the driving shaft 305 can drive the eccentric wheel 306 to drive the sliding plate 304 to rotate forward around the second axis 310, so that the spindle of the spindle box 301 tilts forward by a predetermined angle; when the driving device 309 drives the slide rail 308 to move in the reverse direction of the fourth direction, the driving shaft 305 can drive the eccentric wheel 306 to drive the slide plate 304 to rotate in the reverse direction around the second axis 310, so as to realize the reverse inclination of the main shaft box 301 by a predetermined angle. So that the main spindle of the headstock 301 can be kept in the neutral position or tilted forward or backward with respect to the neutral position.

Alternatively, the driving device 309 includes a fifth driving motor, a lead screw, and a lead screw nut, thereby changing the spindle inclination of the spindle head 301 by linear driving.

Optionally, a transition plate for adjusting the distance between the sliding surface of the sliding rail 308 and the sliding plate 304 is further disposed between the saddle 303 and the sliding rail 308. The slide rail 308 is connected with the transition plate through a screw.

Optionally, a bearing chamber is arranged on the slide rail 308, one end of the driving shaft 305, which is used for being connected with the slide rail 308, extends into the bearing chamber, a tapered roller bearing is arranged in the bearing chamber, an inner ring of the tapered roller bearing is connected with the driving shaft 305 through a lock nut, an outer ring of the tapered roller bearing is attached to the slide rail 308, and an outer ring end face of the tapered roller bearing is pressed in the bearing chamber by a pressing cover.

Alternatively, the drive shaft 305 is locked with the inner race of the eccentric 306 by a lock nut.

In an alternative of this embodiment, the sliding plate 304 is provided with a centering hole, the saddle 303 is provided with a centering shaft, the centering shaft is coaxially installed in the centering hole, and the axes of the centering shaft and the centering hole are both the second axis 310. Through the cooperation of centering hole and centering axle to make slide 304 and saddle 303 link together for the installation axis with second axis 310, this kind of cooperation simple structure just makes the rotation between slide 304 and the saddle 303 more stable, is favorable to improving the accuracy to slide 304 turned angle control.

Optionally, a bearing is disposed between the centering shaft and the centering through hole.

In an alternative of this embodiment, the gantry comprises two uprights 34 and a cross beam 35 connected between the two uprights 34, the cross beam 35 extending in a fourth direction, the mounting frame and the fourth drive assembly 33 being arranged on the cross beam 35.

By providing two uprights 34, on the one hand, support is provided for the machining unit 30 and, on the other hand, space is provided for the movement of the headstock 301 in the third direction. By providing a cross beam 35 extending in the fourth direction, on the one hand a mounting position is provided for the fourth drive assembly 33 and the machining unit 30, and on the other hand a track is provided for the movement of the machining unit 30 in the fourth direction.

Optionally, a plurality of stiffening beams are connected between the two cross beams 35, and the stiffening beams are arranged side by side.

Alternatively, two columns 34 are respectively provided with an automatic tool magazine 36 having an automatic tool changing function, so that a spindle of the spindle head 301 can be quickly and smoothly changed to suit all processing contents for processing the front spindle 2.

Optionally, the machining center 3 further comprises a hydraulic system, a lubrication system, a cooling chip removal system, and the like.

In an alternative of this embodiment, the number of the processing units 30 is two, the number of the fourth driving assemblies 33 is two, and the two fourth driving assemblies 33 are in one-to-one driving connection with the two processing units 30.

Since the front axle 2 has a symmetrical structure, two machining units 30 are provided, so that two symmetrical parts of the front axle 2 can be machined at the same time, thereby improving the machining efficiency of the front axle 2. Furthermore, the four drive assemblies 33 drive the two machining units 30 one to one, i.e. each machining unit 30 can be driven individually to adjust its position on the transverse beam 35.

Optionally, the fourth drive assembly 33 comprises a fourth drive motor, a lead screw and a lead screw nut.

The machining center in this embodiment has the advantages of the clamping device in the first embodiment, and the advantages of the clamping device disclosed in the first embodiment are not described repeatedly herein.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention. Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

Claims

1. A clamping device is used for fixedly clamping a front shaft of a vehicle and is characterized by comprising a positioning plate, a clamping piece, a first through hole and a second through hole, wherein the clamping piece is arranged on the positioning plate and used for locking the front shaft on the positioning plate, so that a main pin hole of the front shaft corresponds to the first through hole, and a plate spring face threaded hole and a plate spring face through hole of the front shaft correspond to the second through hole;

the first through hole is used for allowing a main shaft of the spindle box to extend into and machining the end face of a main pin hole of the front shaft in the first through hole; and the second through hole is used for allowing a main shaft of the spindle box to extend into and machining a plate spring face threaded hole and a plate spring face through hole of the front shaft in the second through hole.

2. The clamping device of claim 1, further comprising a first drive assembly and a second drive assembly, the first drive assembly capable of driving the positioning plate to pivot about a first axis;

3. The clamping device as claimed in claim 2, wherein the first driving assembly comprises at least a first driving motor, and a driving rod of the first driving motor is fixedly connected with the positioning plate;

4. Clamping device according to claim 1,

the clamping device further comprises a supporting block, the supporting block is arranged on the positioning plate, and the supporting block is used for supporting the plate spring surface of the front shaft.

5. A machining center comprising a frame, a gantry, a machining unit, a fourth drive assembly, and the clamping device of claim 2 or 3;

6. The machining center according to claim 5, wherein the mounting frame comprises a slide plate, a saddle and a fifth drive assembly, the saddle is connected to the gantry, the slide plate is rotatably connected to the saddle about a second axis, and the second axis is parallel to the second direction;

7. The machining center according to claim 6, wherein the fifth driving assembly comprises an eccentric, a driving shaft, a slide rail, a slide carriage, and a driving device, the slide rail and the driving device are disposed on the saddle, the slide rail is movably disposed on the slide carriage, and a driving end of the driving device is connected to the slide rail;

8. Machining center according to claim 7,

the sliding plate is provided with a centering hole, the sliding saddle is provided with a centering shaft, the centering shaft is coaxially arranged in the centering hole, and the axes of the centering shaft and the centering hole are both the second axis.

9. The machining center of claim 5, wherein the gantry includes two columns and a beam connected between the two columns, the beam extending in the fourth direction, the mounting bracket and the fourth drive assembly being disposed on the beam.

10. The machining center according to claim 9, wherein the number of the machining units is two, the number of the fourth driving assemblies is two, and the two fourth driving assemblies are in one-to-one driving connection with the two machining units.