阅读说明：本技术 一种轿车后轴铣面钻孔攻丝机床 (Car rear axle milling surface drilling and tapping machine tool ) 是由 施兆春 刘树青 卞荣 于 2021-08-04 设计创作，主要内容包括：本发明公开了一种轿车后轴铣面钻孔攻丝机床,包括床身,沿床身中部设有用于固定轿车后轴的夹持机构,在夹持机构的两侧对称设有用于轿车后轴端面铣削和钻孔的后轴加工装置；夹持机构底部设置第一滑台,第一滑台沿垂直于床身的长度方向设置,夹持机构固定在第一滑台的滑鞍上,沿第一滑台的长度方向带动轿车后轴移动；本发明夹持机构在主定位夹紧之外,在两端法兰旁,从两个方向增加了辅助支撑,消除了间隙,辅助压紧后,无夹紧变形,加工时,无震动；一次装夹完成加工内容,加工尺寸精度,位置度,形位公差,表面粗糙度符合技术协议要求,加工节拍达到160秒/件,加工效率高,使用两套夹持机构,加工时间与装卸料时间重合,节省了时间。(The invention discloses a face milling, drilling and tapping machine tool for a rear axle of a car, which comprises a tool body, wherein a clamping mechanism for fixing the rear axle of the car is arranged along the middle part of the tool body, and rear axle processing devices for milling and drilling the end face of the rear axle of the car are symmetrically arranged at two sides of the clamping mechanism; the bottom of the clamping mechanism is provided with a first sliding table which is arranged along the length direction vertical to the lathe bed, and the clamping mechanism is fixed on a saddle of the first sliding table and drives the rear axle of the car to move along the length direction of the first sliding table; the clamping mechanism is additionally provided with auxiliary supports from two directions beside flanges at two ends outside the main positioning and clamping, so that gaps are eliminated, no clamping deformation exists after auxiliary pressing, and no vibration exists during processing; the machining content is finished by one-time clamping, the machining size precision, the position degree, the form and position tolerance and the surface roughness meet the requirements of technical protocols, the machining beat reaches 160 seconds per piece, the machining efficiency is high, two sets of clamping mechanisms are used, the machining time is coincident with the material loading and unloading time, and the time is saved.)

1. A face milling, drilling and tapping machine tool for a rear axle of a car is characterized by comprising a machine tool body (1), a clamping mechanism (2) for fixing the rear axle of the car is arranged along the middle part of the machine tool body, and rear axle processing devices (3) for milling and drilling the end face of the rear axle of the car are symmetrically arranged on two sides of the clamping mechanism; the bottom of the clamping mechanism (2) is provided with a first sliding table (4), the first sliding table (4) is arranged along the length direction vertical to the lathe bed (1), the clamping mechanism (2) is fixed on a saddle of the first sliding table (4), and the rear axle of the car is driven to move along the length direction of the first sliding table (4); rear axle processingequipment (3) are attacked multi-spindle box (6) including milling device (5) and the brill that sets up side by side along the first slip table direction of perpendicular to, are equipped with in milling device (5) and brill and are used for driving the two and move removal subassembly (7) that carry out car rear axle processing on the lathe bed.

2. The face milling, drilling and tapping machine tool for the rear axle of the car as claimed in claim 1, wherein the clamping mechanism (2) comprises a clamp body (8), the clamp body (8) is connected with a saddle of the first sliding table (4), a main positioning and clamping mechanism (9) for limiting the flange end of the rear axle of the car, an angular limiting mechanism (10) for clamping one end of the rear axle of the car, which is far away from the flange, and a pneumatic plugging mechanism (11) for plugging the flange hole, which is arranged at the flange hole of the rear axle of the car, are arranged on the clamp body (8); the main positioning and clamping mechanisms (9) are symmetrically arranged along the length direction of the flange end of the rear axle of the car, each main positioning and clamping mechanism (9) comprises a first support (12), each first support (12) is fixed on the upper surface of the corresponding clamp body (8) through a screw, a positioning pin (13) is vertically arranged on the upper surface of each first support (12), and a positioning hole corresponding to the positioning pin (13) is formed in the rear axle of the car; a pressing component (14) for pressing the upper part of the rear axle of the car is arranged on the support;

the pressing assembly (14) comprises a first oil cylinder (15), a first pressing plate (16) and a first pressing block (17), the first oil cylinder (15) is vertically arranged on the first support (12), the driving end of the first oil cylinder is upward, one end of the first pressing plate (16) is hinged to the driving end of the first oil cylinder, the other end of the first pressing plate is connected with the first pressing block (17), a first supporting block (18) and a hinged rod (19) are arranged below the middle of the first pressing plate (16), one end of the hinged rod (19) is hinged to the first supporting block (18), the other end of the hinged rod is hinged to the first pressing plate (16), a lever mechanism is formed together with the first oil cylinder (15), and the first pressing block (17) is driven to press the rear axle of the car.

3. The face milling, drilling and tapping machine tool for the rear axle of the car as claimed in claim 2, characterized in that one of the positioning pins (13) is a cylindrical pin, and the other positioning pin is a diamond pin; the first support (12) is provided with a proximity switch for detecting whether the main positioning and clamping mechanism (9) is pressed, the driving end of the first oil cylinder (15) is provided with a signal iron (20), after the pressing is confirmed through the signal iron (20) and the proximity switch, a machine tool is started to process, and a first nylon cushion (21) is arranged on the contact surface of the first pressing block (17) and the rear axle of the car.

4. The face milling, drilling and tapping machine tool for the rear axle of the car as claimed in claim 2, wherein the angular limiting mechanism (10) comprises a pre-positioning support (22) and a positioning assembly, the pre-positioning support (22) and the positioning assembly are symmetrically arranged on two sides of the rear axle of the car, the positioning assembly comprises a positioning seat (23), a first air cylinder (24), a positioning shaft (25), a linking seat (26) and a connecting joint (27), the positioning shaft (25) penetrates through the positioning seat (23) along the direction of the pre-positioning support (22), the rear axle of the car is positioned by a diamond pin arranged at the end part, and a positioning hole is correspondingly arranged on the rear axle of the car; the other end of the positioning shaft (25) is connected with a piston rod of the first air cylinder (24) through a linking seat (26) and a connecting joint (27).

5. The face milling, drilling and tapping machine tool for the rear axle of the car as claimed in claim 2, a lateral auxiliary supporting mechanism (28) and a bottom auxiliary supporting clamping mechanism (29) which are arranged on the side surface of one end of the rear axle where the two flanges are positioned are also arranged on the clamp body (8), the bottom auxiliary support clamping mechanism comprises a second support (30), a second oil cylinder (31), a push rod (32), a horizontal wedge iron (33) and a wedge iron shaft (34), the second support (30) is fixed on the clamp body (8) and is positioned below the flange end of the rear shaft of the car, the second oil cylinder (31) is horizontally arranged on one side of the second support (30), the push rod (32) is connected with a piston rod of the second oil cylinder (31), the other end of the push rod penetrates into the horizontal wedge iron (33), a mounting hole for placing a horizontal wedge (33) is formed in the lower part of the second support (30), and the second oil cylinder (31) pushes the ejector rod (32) to drive the horizontal wedge (33) to move in the horizontal direction; the wedge shaft (34) is vertically arranged above the horizontal wedge (33), a dovetail groove (35) is formed in the upper surface of the horizontal wedge (33), the dovetail groove (35) is parallel to the pushing direction of the second oil cylinder (31), the bottom of the wedge shaft (34) is matched with the dovetail groove (35) of the horizontal wedge (33), the top of the wedge shaft penetrates through the second support (30) and then is located above the second support (30), a second support block (36) is arranged at the top of the wedge shaft (34), and the dovetail groove of the horizontal wedge (33) drives the wedge shaft (34) to ascend and descend in the vertical direction to support the bottom of the rear axle of the car;

an auxiliary clamping assembly (37) for pressing the area of the rear axle of the car above the wedge axle (34) is arranged on the side surface of the second support (30), and the auxiliary clamping assembly (37) and the pressing assembly (14) adopt the same structure.

6. The face milling, drilling and tapping machine tool for the rear axle of the sedan according to claim 5, wherein the lateral auxiliary supporting mechanism (28) comprises an oil pressure supporting cylinder (38) and a third support seat (39) arranged at the bottom of the oil pressure supporting cylinder (38), and the piston end of the oil pressure supporting cylinder (38) is opposite to the side face of the rear axle of the sedan.

7. The face milling, drilling and tapping machine tool for the rear axle of the car according to claim 2, characterized in that the pneumatic plugging mechanism (11) comprises a plugging cylinder (40), a second pressing plate (41) and a second stop block (42), a plugging support (41) is arranged at the bottom of the plugging cylinder (40), the plugging support (41) is fixed on the clamp body (8) in the direction parallel to the flange hole of the rear axle of the car, the second pressing plate (41) is connected with the plugging cylinder (40) in the direction perpendicular to the driving end of the plugging cylinder (40), the second stop block (42) is fixed at the other end of the second pressing plate (41) and faces the flange hole of the rear axle of the car, and the flange hole is plugged when the milling, drilling and tapping of the flange face are performed.

8. The car rear axle milling, drilling and tapping machine tool according to claim 2, characterized in that the moving assembly (7) comprises a second sliding table (43) parallel to the first sliding table (4), and a third sliding table (44) and a fourth sliding table (45) perpendicular to the first sliding table (4), the third sliding table (44) and the fourth sliding table (45) are respectively fixed at two ends of a saddle of the second sliding table (43) and synchronously slide along the second sliding table (43), the milling device (5) is fixed on a saddle of the third sliding table (44), and the drilling and tapping multi-shaft box (6) is fixed on a saddle of the fourth sliding table (45).

9. The car rear axle milling surface drilling and tapping machine tool according to claim 2, characterized in that an angle backing plate (46) used for controlling the inclination angles of the third sliding table (44) and the fourth sliding table (45) is correspondingly arranged on a sliding saddle on the second sliding table (43), sliding table angle adjusting assemblies are respectively arranged on the side surfaces of the third sliding table (44) and the fourth sliding table (45), each sliding table angle adjusting assembly comprises a leaning seat (47) and an adjusting pad (48), and an adjusting screw (49) used for adjusting the position of the adjusting pad is arranged on the leaning seat (47) in a penetrating manner.

10. The car rear axle milling, drilling and tapping machine tool according to claim 1, characterized in that a backing plate (50) is arranged below the machine tool body (1), a broken cutter detection mechanism for detecting the state of a tool bit is arranged on the machine tool body (1), and comprises a detection cylinder (51) and a broken cutter detection proximity switch (52), wherein the driving end of the detection cylinder (51) is connected with the broken cutter detection proximity switch (52) to drive the broken cutter detection proximity switch (52) to move towards a tool to detect whether a cutter is broken or not.

Technical Field

The invention relates to the technical field of machining equipment, in particular to a face milling, drilling and tapping machine tool for a rear shaft of a car.

Background

The material of car rear axle, cold forming hot rolling car structure spare, the shape is complicated, yielding, the on-the-spot machining center that adopts is processed, mills one platform, one drilling and tapping, bores, and milling fixture need join in marriage the revolving platform, mills about 2 minutes (not containing the loading and unloading time) of face time, and drilling and tapping time is about 3 minutes, adopts machining center to process, and required equipment specification is big, and the number of stages is two at least, and the anchor clamps of joining in marriage adds the axis of rotation, and is with high costs, adds man-hour, the unipolar tool changing, and efficiency is lower. The workpiece is transferred between two devices, the clamping times are multiple, the error is large, and the machining precision is low.

Disclosure of Invention

The technical purpose is as follows: the invention discloses a face milling, drilling and tapping machine tool for a rear axle of a car, aiming at the defects of large specification, repeated clamping in the process, large error, low machining precision and efficiency of the conventional rear axle equipment of the car.

The technical scheme is as follows: in order to achieve the technical purpose, the invention adopts the following technical scheme:

a face milling, drilling and tapping machine tool for a rear axle of a car comprises a machine body, wherein a clamping mechanism for fixing the rear axle of the car is arranged along the middle part of the machine body, and rear axle processing devices for milling and drilling the end face of the rear axle of the car are symmetrically arranged on two sides of the clamping mechanism; the bottom of the clamping mechanism is provided with a first sliding table which is arranged along the length direction vertical to the lathe bed, and the clamping mechanism is fixed on a saddle of the first sliding table and drives the rear axle of the car to move along the length direction of the first sliding table; rear axle processingequipment includes along the milling equipment that the first slip table direction of perpendicular to set up side by side and bores and attack the multi-spindle box, attacks the multi-spindle box below at milling equipment and brill and be equipped with the removal subassembly that is used for driving the two and moves on the lathe bed and carry out car rear axle processing.

Preferably, the clamping mechanism comprises a clamp body, the clamp body is connected with a saddle of the first sliding table, a main positioning and clamping mechanism for limiting the flange end of the rear axle of the car, an angular limiting mechanism for clamping one end of the rear axle of the car, which is far away from the flange, and a pneumatic plugging mechanism which is arranged at the flange hole of the rear axle of the car and used for plugging the flange hole are arranged on the clamp body; the main positioning and clamping mechanisms are symmetrically arranged along the length direction of the flange end of the rear axle of the car, each main positioning and clamping mechanism comprises a first support, each first support is fixed on the upper surface of the clamp body through a screw, a positioning pin is vertically arranged on the upper surface of each first support, and a positioning hole corresponding to the positioning pin is formed in the rear axle of the car; a pressing component used for pressing the upper part of the rear axle of the car is arranged on the support;

the pressing assembly comprises a first oil cylinder, a first pressing plate and a first pressing block, the first oil cylinder is vertically arranged on a first support, the driving end of the first oil cylinder is upward, one end of the first pressing plate is hinged to the driving end of the first oil cylinder, the other end of the first pressing plate is connected with the first pressing block, a first supporting block and a hinge rod are arranged below the middle of the first pressing plate, one end of the hinge rod is hinged to the first supporting block, the other end of the hinge rod is hinged to the first pressing plate, a lever mechanism is jointly formed by the hinge rod and the first oil cylinder, and the first pressing block is driven to press the rear shaft of the car.

Preferably, one of the positioning pins adopts a cylindrical pin, and the other positioning pin adopts a diamond pin; the first support is provided with a proximity switch for detecting whether the main positioning and clamping mechanism is pressed, the driving end of the first oil cylinder is provided with signal iron, after the pressing is confirmed through the signal iron and the proximity switch, a machine tool is started to process, and a first nylon cushion is arranged on the contact surface of the first pressing block and the rear axle of the car.

Preferably, the angular limiting mechanism comprises a pre-positioning support and a positioning assembly, the pre-positioning support and the positioning assembly are symmetrically arranged on two sides of the rear axle of the car, the positioning assembly comprises a positioning seat, a first air cylinder, a positioning shaft, a linking seat and a connecting joint, the positioning shaft penetrates through the positioning seat along the direction of the pre-positioning support, the rear axle of the car is positioned through a diamond pin arranged at the end part of the positioning shaft, and the rear axle of the car is correspondingly provided with a positioning hole; the other end of the positioning shaft is connected with a piston rod of the first cylinder through a linking seat and a connecting joint.

Preferably, the lateral auxiliary supporting mechanism and the bottom auxiliary supporting and clamping mechanism are further arranged on the clamp body and are arranged on the side face of one end, where the two flanges of the rear axle of the car are located, of the clamp body, the bottom auxiliary supporting and clamping mechanism comprises a second support, a second oil cylinder, a push rod, a horizontal wedge and a wedge shaft, the second support is fixed on the clamp body and is located below the flange end of the rear axle of the car, the second oil cylinder is horizontally arranged on one side of the second support, the push rod is connected with a piston rod of the second oil cylinder, the other end of the push rod penetrates into the horizontal wedge, a mounting hole for placing the horizontal wedge is formed in the lower portion of the second support, and the second oil cylinder pushes the push rod to drive the horizontal wedge to move in the horizontal direction; the wedge shaft is vertically arranged above the horizontal wedge, a dovetail groove is formed in the upper surface of the horizontal wedge, the dovetail groove is parallel to the pushing direction of the second oil cylinder, the bottom of the wedge shaft is matched with the dovetail groove of the horizontal wedge, the top of the wedge shaft penetrates through the second support and then is located above the second support, a second support block is arranged at the top of the wedge shaft, and the dovetail groove of the horizontal wedge drives the wedge shaft to ascend and descend in the vertical direction to support the bottom of the rear axle of the car; and an auxiliary clamping assembly for compressing the area of the rear axle of the car above the wedge axle is arranged on the side surface of the second support, and the auxiliary clamping assembly and the compressing assembly adopt the same structure.

Preferably, the lateral auxiliary support mechanism of the invention comprises an oil pressure support cylinder and a third support arranged at the bottom of the oil pressure support cylinder, and the piston end of the oil pressure support cylinder is aligned with the side surface of the rear axle of the sedan.

Preferably, the pneumatic plugging mechanism comprises a plugging air cylinder, a second pressing plate and a second stopper, wherein a plugging support is arranged at the bottom of the plugging air cylinder, the plugging support is fixed on the clamp body along the direction parallel to the flange hole of the rear axle of the car, the second pressing plate is connected with the plugging air cylinder along the direction perpendicular to the driving end of the plugging air cylinder, the second stopper is fixed at the other end of the second pressing plate and is opposite to the flange hole of the rear axle of the car, and the flange hole is plugged when the flange surface is milled, drilled and tapped.

Preferably, the moving assembly comprises a second sliding table parallel to the first sliding table, and a third sliding table and a fourth sliding table perpendicular to the first sliding table, the third sliding table and the fourth sliding table are respectively fixed at two ends of a saddle of the second sliding table and synchronously slide along the second sliding table, the milling device is fixed on the saddle of the third sliding table, and the drilling and tapping multi-shaft box is fixed on the saddle of the fourth sliding table.

Preferably, the angle base plate for controlling the inclination angles of the third sliding table and the fourth sliding table is correspondingly arranged on the saddle on the second sliding table, sliding table angle adjusting assemblies are respectively arranged on the side surfaces of the third sliding table and the fourth sliding table, each sliding table angle adjusting assembly comprises a leaning seat and an adjusting pad, and an adjusting screw for adjusting the position of the adjusting pad penetrates through the leaning seat.

Preferably, a base plate is arranged below the lathe bed, a broken cutter detection mechanism for detecting the state of the tool bit is arranged on the lathe bed, and the broken cutter detection mechanism comprises a detection cylinder and a broken cutter detection proximity switch, wherein the driving end of the detection cylinder is connected with the broken cutter detection proximity switch to drive the broken cutter detection proximity switch to move towards the tool so as to detect whether a cutter is broken or not.

Has the advantages that: the car rear axle milling surface drilling and tapping machine tool provided by the invention has the following beneficial effects:

1. according to the clamping mechanism, the main positioning clamping mechanism is arranged on the main body structure of the rear axle of the car, the lateral auxiliary supporting mechanism and the bottom auxiliary supporting clamping mechanism are arranged beside the flange of the rear axle of the car, and after the auxiliary supporting device is additionally arranged in two directions for auxiliary pressing, the clamping deformation is avoided, the vibration is avoided during processing, and the processing can be conveniently carried out.

2. According to the invention, the pneumatic plugging mechanism is arranged at the end part of the flange, so that the phenomenon that cooling liquid is immersed into a workpiece through the long hole at the flange during processing is avoided.

3. According to the multi-surface multi-station multi-shaft machining technology, after the clamping mechanism fixes the workpiece, the milling device and the drilling and tapping multi-shaft box which are arranged side by side are matched with the moving assembly arranged below the milling device and the drilling and tapping multi-shaft box, so that the workpiece is machined without repeated clamping, the machining precision can be guaranteed, and the machining efficiency is high.

4. The clamping mechanisms are arranged in two groups side by side along the length direction of the first sliding table, one clamp is used for machining during machining, the other clamp is used for loading and unloading materials, machining time is coincident with loading and unloading time and is synchronously carried out, time is saved, and machining efficiency is improved.

5. The main positioning and clamping mechanism is used for positioning by matching the positioning pins with the positioning holes in the rear shaft of the car, one positioning pin adopts a cylindrical pin, and the other positioning pin adopts a diamond pin, so that the swinging of a workpiece can be limited, and the machining precision is ensured.

6. The bottom auxiliary supporting mechanism utilizes the dovetail groove on the horizontal wedge iron to be matched with the bottom of the wedge iron shaft, pushes the wedge iron shaft to move up and down in the second support, supports the bottom of the flange end of the rear axle of the car, and is matched with the auxiliary clamping assembly positioned right above the position of the wedge iron shaft to fix the flange end of the rear axle of the car, so that the vibration generated during the flange end face machining is avoided.

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 description of the embodiments or the prior art will be briefly described below.

FIG. 1 is a front view of the overall structure of the present invention;

FIG. 2 is a top view of the overall structure of the present invention;

FIG. 3 is a front view of the clamping mechanism of the present invention;

FIG. 4 is a top view of the clamping mechanism of the present invention;

FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4 of the primary positioning and clamping mechanism of the present invention;

FIG. 6 is a view of the angular stop mechanism of the present invention taken along the line B of FIG. 4;

FIG. 7 is a view of the present invention taken along fixture C of FIG. 4;

FIG. 8 is a block diagram of the moving assembly of the present invention;

FIG. 9 is a view of the sliding table angle adjustment assembly of the present invention;

FIG. 10 is a view of the structure of the break detecting mechanism of the present invention;

the device comprises a lathe bed 1, a clamping mechanism 2, a rear shaft 3, a rear shaft processing device 4, a first sliding table 5, a milling device 6, a drilling and tapping multi-shaft box 7, a moving assembly 8, a clamp body 9, a main positioning and clamping mechanism 10, an angular limiting mechanism 11, a pneumatic plugging mechanism 12, a first support seat 13, a positioning pin 14, a pressing assembly 14, a first oil cylinder 15, a first pressing plate 16, a first pressing block 17, a first supporting block 18, a hinge rod 19, a signal iron 20, a first nylon cushion 21, a pre-positioning support 22, a positioning seat 23, a first air cylinder 24, a positioning shaft 25, a linkage seat 26, a connecting joint 27, a lateral auxiliary supporting mechanism 28, a positioning shaft 25, a positioning shaft 26, a lateral auxiliary supporting mechanism 28, a positioning mechanism and a positioning mechanism, 29-bottom auxiliary support clamping mechanism, 30-second support, 31-second oil cylinder, 32-ejector rod, 33-horizontal wedge, 34-wedge shaft, 35-dovetail groove, 36-second support block, 37-auxiliary clamping assembly, 38-oil pressure support cylinder, 39-third support, 40-plugging air cylinder, 41-second pressure plate, 42-second stop block, 43-second sliding table, 44-third sliding table, 45-fourth sliding table, 46-angle backing plate, 47-backup seat, 48-adjusting pad, 49-adjusting screw, 50-backing plate, 51-detection air cylinder, 52-cutter-breaking detection proximity switch and 53-second nylon pad.

Detailed Description

The present invention will be more clearly and completely described below by way of a preferred embodiment in conjunction with the accompanying drawings, without thereby limiting the scope of the invention to the described embodiment.

Fig. 1 and 2 show that the car rear axle milling surface drilling and tapping machine tool disclosed by the invention is used for fixing and processing a car rear axle, the workpiece material is a cold-formed hot-rolled car structural member, a welded member is far away from a positioning and clamping point at a processed position, and in order to prevent processing vibration deformation, auxiliary supporting and clamping are arranged on the side surface close to the bottom surface of the processed position; the machine tool comprises a machine body 1, wherein a clamping mechanism 2 for fixing a rear axle of the car is arranged along the middle part of the machine body, and rear axle processing devices 3 for milling and drilling the end face of the rear axle of the car are symmetrically arranged at two sides of the clamping mechanism; the bottom of the clamping mechanism 2 is provided with a first sliding table 4, the first sliding table 4 is arranged along the length direction vertical to the lathe bed 1, the clamping mechanism 2 is fixed on a saddle of the first sliding table 4, and the rear axle of the car is driven to move along the length direction of the first sliding table 4; rear axle processingequipment 3 includes that the multi-spindle box 6 is attacked to milling device 5 and the brill that sets up side by side along the first slip table direction of perpendicular to is equipped with and is used for driving the two and move the removal subassembly 7 that carries out car rear axle processing on the lathe bed below the multi-spindle box 6 is attacked to milling device 5 and brill, attacks multi-spindle box 6 through removing the subassembly and removes, carries out the adjustment of processing position according to manufacturing procedure.

A base plate 50 is arranged below the lathe bed 1, a broken cutter detection mechanism for detecting the state of a tool bit is arranged on the lathe bed 1, the structure is shown in fig. 10, the broken cutter detection mechanism comprises a detection cylinder 51 and a broken cutter detection proximity switch 52, the driving end of the detection cylinder 51 is connected with the broken cutter detection proximity switch 52, the broken cutter detection proximity switch 52 is driven to move towards a cutter, whether the cutter is broken or not is detected, if the cutter is broken, the proximity switch has no induction signal, and a system gives an alarm; and one side of the lathe body is also provided with an electric component, a lubricating component, a pneumatic component, a hydraulic component, a liquid path component, a cooling component, a water path component, a protection component, a left detection device, a right detection device and a cutter auxiliary tool component which correspond to each other, and the protection component is correspondingly arranged outside each device to prevent chips, cooling liquid and the like from entering the guide surface of the sliding table to cause abrasion.

As shown in fig. 8 and 9, the moving assembly 7 of the present invention includes a second slide table 43 parallel to the first slide table 4, and a third slide table 44 and a fourth slide table 45 perpendicular to the first slide table 4, the third slide table 44 and the fourth slide table 45 are respectively fixed at both ends of a saddle of the second slide table 43 and synchronously slide along the second slide table 43, the milling device 5 is fixed on a saddle of the third slide table 44, and the drilling and tapping multi-spindle box 6 is fixed on a saddle of the fourth slide table 45; an angle base plate 46 for controlling the inclination angles of the third sliding table 44 and the fourth sliding table 45 is correspondingly arranged on a saddle on the second sliding table 43, and the angle of a milling surface can be controlled through the angle base plate; all be equipped with slip table angular adjustment subassembly in the side of third slip table 44 and fourth slip table 45, slip table angular adjustment subassembly is worn to be equipped with the adjusting screw 49 that is used for adjusting the adjustment pad position including leaning on seat 47 and adjustment pad 48 by leaning on the seat 47, through adjusting screw, adjustable slip table small-angle swing, after adjusting, with the screw fastening.

As shown in fig. 3 and 4, the clamping mechanism 2 of the invention comprises a clamp body 8, the clamp body 8 is connected with a saddle of the first sliding table 4, a main positioning clamping mechanism 9 for limiting the flange end of the rear axle of the car, an angular limiting mechanism 10 for clamping the end of the rear axle of the car, which is far away from the flange, and a pneumatic plugging mechanism 11 for plugging the flange hole, which is arranged at the flange hole of the rear axle of the car; the main positioning and clamping mechanisms 9 are symmetrically arranged along the length direction of the flange end of the rear axle of the car, each main positioning and clamping mechanism 9 comprises a first support 12, each first support 12 is fixed on the upper surface of the corresponding clamp body 8 through a screw, a positioning pin 13 is vertically arranged on the upper surface of each first support 12, and a positioning hole corresponding to the positioning pin 13 is formed in the rear axle of the car; a pressing component 14 for pressing the upper part of the rear axle of the car is arranged on the support; as shown in fig. 5, the pressing assembly 14 includes a first oil cylinder 15, a first pressing plate 16 and a first pressing block 17, the first oil cylinder 15 is vertically disposed on the first support 12, the driving end is upward, one end of the first pressing plate 16 is hinged to the driving end of the first oil cylinder, the other end of the first pressing plate is connected to the first pressing block 17, a first support block 18 and a hinge rod 19 are disposed below the middle portion of the first pressing plate 16, one end of the hinge rod 19 is hinged to the first support block 18, the other end of the hinge rod is hinged to the first pressing plate 16, and a lever mechanism is formed by the hinge rod and the first oil cylinder 15 together, so as to drive the first pressing block 17 to press the rear axle of the car.

One of the positioning pins 13 adopts a cylindrical pin, and the other positioning pin adopts a diamond pin; the first support 12 is provided with a proximity switch for detecting whether the main positioning and clamping mechanism 9 is pressed, the driving end of the first oil cylinder 15 is provided with a signal iron 20, after the pressing is confirmed through the signal iron 20 and the proximity switch, a machine tool is started to process, and a first nylon cushion 21 is arranged on the contact surface of the first pressing block 17 and the rear axle of the car.

As shown in fig. 6, the angular position-limiting mechanism 10 of the present invention includes a pre-positioning bracket 22 and a positioning assembly, the pre-positioning bracket 22 and the positioning assembly are symmetrically disposed on two sides of the rear axle of the car, the positioning assembly includes a positioning seat 23, a first cylinder 24, a positioning shaft 25, a linking seat 26 and a connecting joint 27, the positioning shaft 25 passes through the positioning seat 23 along the direction of the pre-positioning bracket 22, the rear axle of the car is positioned by a diamond pin disposed at the end, and the rear axle of the car is correspondingly provided with a positioning hole; the other end of the positioning shaft 25 is connected with a piston rod of a first cylinder 24 through a linking seat 26 and a connecting joint 27, and the first cylinder 24 pushes a diamond pin to enter a positioning hole on the rear shaft of the car for pre-positioning.

As shown in figures 4 and 7, the invention also arranges a lateral auxiliary supporting mechanism 28 and a bottom auxiliary supporting clamping mechanism 29 on the clamp body 8, wherein the lateral auxiliary supporting mechanism 28 is arranged on the side surface of one end of the two flanges of the rear axle of the sedan, the lateral auxiliary supporting mechanism 28 comprises an oil pressure supporting cylinder 38 and a third support 39 arranged at the bottom of the oil pressure supporting cylinder 38, the piston end of the oil pressure supporting cylinder 38 is right opposite to the side surface of the rear axle of the sedan, the bottom auxiliary supporting clamping mechanism comprises a second support 30, a second oil cylinder 31, a push rod 32, a horizontal wedge 33 and a wedge shaft 34, the second support 30 is fixed on the clamp body 8 and is positioned below the flange end of the rear axle of the sedan, the second oil cylinder 31 is horizontally arranged on one side of the second support 30, the push rod 32 is connected with the piston rod of the second oil cylinder 31, the other end penetrates into the horizontal wedge 33, a mounting hole for placing the horizontal wedge 33 is formed in the lower part of the second support 30, and the second oil cylinder 31 pushes the ejector rod 32 to drive the horizontal wedge 33 to move in the horizontal direction; the wedge shaft 34 is vertically arranged above the horizontal wedge 33, a dovetail groove 35 is formed in the upper surface of the horizontal wedge 33, the dovetail groove 35 is parallel to the pushing direction of the second oil cylinder 31, the bottom of the wedge shaft 34 is matched with the dovetail groove 35 of the horizontal wedge 33, the top of the wedge shaft passes through the second support 30 and then is located above the second support 30, a second support block 36 is arranged at the top of the wedge shaft 34, a second nylon cushion 53 is arranged on the upper surface of the second support block 36, and the dovetail groove of the horizontal wedge 33 drives the wedge shaft 34 to ascend and descend in the vertical direction to support the bottom of the rear axle of the car;

an auxiliary clamping assembly 37 for clamping the region of the rear axle of the passenger car above the wedge shaft 34 is arranged on the side of the second support 30, and the auxiliary clamping assembly 37 is of the same structure as the clamping assembly 14.

The pneumatic plugging mechanism 11 comprises a plugging air cylinder 40, a second pressing plate 41 and a second stopper 42, wherein a plugging support 41 is arranged at the bottom of the plugging air cylinder 40, the plugging support 41 is fixed on a fixture body 8 along the direction parallel to a flange hole of a rear axle of a sedan, the second pressing plate 41 is connected with the plugging air cylinder 40 along the direction vertical to the driving end of the plugging air cylinder 40, the second stopper 42 is fixed at the other end of the second pressing plate 41 and is opposite to the flange hole of the rear axle of the sedan, and the flange hole is plugged when the flange surface is milled, drilled and tapped, so that cooling liquid is prevented from being soaked into a workpiece.

When the face milling, drilling and tapping machine tool for the rear axle of the car is used, a workpiece is clamped by a clamping mechanism, and the specific working procedures are as follows:

1. the end of the rear axle workpiece flange of the car is taken as a near end, the end deviating from the flange is taken as a far end, the positioning pin 13 is inserted into the positioning hole formed in the bottom of the workpiece, and the two first air cylinders 24 on the two sides of the far end of the workpiece act to push the positioning shaft to move, so that the diamond-shaped pin is inserted into the positioning hole in the far end of the workpiece.

2. Two main positioning and clamping mechanisms at the near end of the workpiece act, a first pressing plate 16 is pushed to rotate around a hinge rod 19 through a first oil cylinder 15, and a first pressing block 17 is pressed on the upper portion of the workpiece.

3. The second oil cylinder 31 of the bottom auxiliary supporting and clamping mechanism pushes the horizontal wedge 33 to move, the wedge shaft 34 is driven to move upwards through the dovetail groove, the second supporting block 36 tightly pushes the lower part of the workpiece flange, and the auxiliary clamping assembly 37 tightly presses the part above the bottom auxiliary supporting and clamping mechanism of the workpiece, so that auxiliary clamping is completed.

4. The oil pressure support cylinder 38 of the lateral auxiliary support mechanism tightly supports the side surface of the flange end of the workpiece.

5. The blocking cylinder 40 of the pneumatic blocking mechanism drives the second stop block 42 to block the flange end of the workpiece through the second pressing plate 41, so that the cooling liquid is prevented from immersing into the workpiece.

After pressing from both sides tight the completion, start the lathe and process, can set up two sets of fixture, a set of add man-hour, another group dismantles, go on in step, process time and loading and unloading time coincidence, time is saved, at first through the second slip table, the rear axle processingequipment who drives the top removes, the third, fourth slip table synchronous motion, buffering near the work piece position, survey, stop, confirm the processing position coordinate, carry out milling of work piece terminal surface by milling unit earlier, then the position of fourth slip table is adjusted once more to the second slip table, use to bore and attack the multi-spindle box and carry out drilling, chamfer and tapping operation.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.