CN206601229U - A kind of double tool rest reliability test of combination loading - Google Patents

Abstract

The utility model belongs to the technical field of mechanical testing equipment and methods, and relates to a combined loading double-turret reliability test device, which includes two tool rests, a double-turret mounting table device, a combined loading device, a control cabinet, a data acquisition box and Console; the two tool holders are installed on the double tool holder installation device and move along the guide rail driven by the servo motor; the joint loading device is located above the double tool holder installation device and is arranged between the two tool holders to realize simultaneous alignment. The load is applied by two tool holders, and the performance of the tool holder is tested; the utility model realizes the switching between ordinary cutter head loading and power cutter head loading through layered automatic switching, and the ordinary cutter head loading is based on the direction-adjustable Piezoelectric ceramic loading mechanism, the power cutter head loading is based on the principle of two power cutter heads against each other and the bending moment, vibration loading structure; through a set of image detection mechanism to detect the working conditions of two tool holders at the same time, so that the integration and automation of the utility model high.

Description

A Combined Loading Double Tool Holder Reliability Test Device

technical field

The utility model belongs to the technical field of mechanical test equipment and methods, and relates to a reliability test device for combined loading of double tool holders, in particular to a reliability test capable of simulating the working conditions of two numerical control tool holders at the same time device.

technical background

As the key functional component of CNC lathe, the CNC tool post's failure directly affects the machining accuracy and work efficiency of the lathe. Looking at the current reliability test benches of CNC tool holders at home and abroad, most of them can only conduct reliability tests on a single CNC tool holder, and the numerous loading devices and accessories lead to high cost and low space utilization of the test bench. In terms of loading the power head of the dynamic servo tool post, most of the test benches currently only use the dynamometer to load the power head with torque, which cannot simulate bending moment and cutting vibration. In the process of performance testing, the traditional detection methods are too scattered, and the installation of sensors and monitoring equipment is not well considered in the design of reliability devices.

Utility model content

The technical problem to be solved by the utility model is that the prior art cannot carry out a combined reliability test on two tool holders, the cost of loading the power tool head is too large and the working conditions cannot be well simulated. A tool holder reliability test device is provided for jointly carrying out cutting force loading and power head loading on two power servo tool holders of the same model.

The reliability test device described in this patent adopts the method of layered automatic switching to realize the switching between the ordinary cutter head loading mode and the power head loading mode. For the cutting force loading of the common cutter head on the top layer, this patent uses a piezoelectric ceramic loading mechanism that can manually adjust the magnitude and direction of the cutting force to apply dynamic cutting force to the two CNC tool holders. A detection area is designed on the top floor, and an image detector including two cameras is installed to realize real-time detection of parameters such as the positioning accuracy of the two tool holders. At the same time, the remaining space can be equipped with other sensors required for detection; for the bottom dynamic cutter head Torque loading, using the principle of supporting the motor, designed two power cutter heads with a transmission structure, so that the power cutter heads of the two tool holders apply torque to each other, replacing the high-cost solution of the traditional dynamometer to apply torque. At the same time, the electromagnetic loader is used to apply cutting force dynamic load to the dynamic cutter head. The tightness of the belt is adjusted through the tension wheel adjustment mechanism, so as to apply a bending moment load to the power cutter head.

In order to solve the above-mentioned technical problems, the utility model is realized by adopting the following technical solutions, which are explained as follows in conjunction with the accompanying drawings:

A joint-loaded double-turret reliability test device includes two knife-rests, a double-turret installation platform device 8, a combined loading device 2, a control cabinet 4, a data acquisition box 5, and a console 6;

The two knife rests are installed on the double knife rest mounting device 8, and are driven by the servo motor 16 in the double knife rest mounting device 8 along the guide rail 11 in the double knife rest mounting device 8;

The combined loading device 2 is located above the double-turret mounting table device 8, and is arranged between the two tool rests, so as to simultaneously simulate the load on the two tool rests during cutting, and detect the performance of the tool rests;

The input end of the control cabinet 4 is connected to the console 6, and the output end is connected to the two tool holders;

The data collection box 5 is placed on the console 6 , the input of the data collection box 5 is connected to the image detector 22 in the joint loading device 2 , and the output of the data collection box 5 is connected to the computer of the console 6 .

The double turret installation device 8 described in the technical solution also includes two screw rods 12, eight sliders 14 and two turret bases 15;

The guide rails 11 are provided with two, and the two guide rails 11 are horizontally fixed on the bottom plate of the double tool rest mounting table device 8;

Described servomotor 16 is provided with two, and described two screw mandrels 12 rotate under the drive of two servomotors 16, and each knife rest base 15 bottoms has four slide blocks 14, and described two knife rests are installed on On two knife rest bases 15.

The combined loading device 2 in the technical solution includes a loading mode switching bracket 27;

The loading mode switch bracket 27 includes upper and lower layers, which are the ordinary cutter head loading layer 24 and the powered cutter head loading layer 25 respectively, which can respectively load the ordinary cutter head 10 and the powered cutter head 9 of the tool holder.

The ordinary cutter head loading layer 24 described in the technical solution includes two sets of piezoelectric ceramic cutting force loading mechanisms 23;

The piezoelectric ceramic cutting force loading mechanism 23 includes a cutting force direction adjustment mechanism support plate 21, an adjustment screw 29, a feed control motor 30, a cutting force direction adjustment frame 31, a spiral motion pair 32, a piezoelectric ceramic loader base 33, Pressure sensor 34, piezoelectric ceramic loading rod 35, cutting force inclination adjustment knob 36, hemispherical groove loading head 37;

The support plate 21 of the cutting force direction adjustment mechanism is fixed on the position adjustment groove 28 on the surface of the ordinary cutter head loading layer 24;

One end of the adjustment screw 29 is assembled with the hole on the support plate 21 of the cutting force direction adjustment mechanism, and the other end is fixed with the cutting force direction adjustment frame 31 through the shaft hole;

The feed control motor 30 is fixed on the tail end of the cutting force direction adjustment frame 31, the output shaft of the feed control motor 30 is connected to the screw motion pair 32, and the other end of the screw motion pair 32 is connected to the piezoelectric ceramic loader base 33; The cutting force adjustment frame 31 can rotate around the cutting force inclination adjustment knob 36;

One end of the piezoelectric ceramic loader base 33 is connected to the screw motion pair 32, and a pressure sensor 34 is installed at the other end;

The piezoelectric ceramic loading rod 35 is connected to the piezoelectric sensor 34, and the other end is provided with a hemispherical groove loading head 37; the piezoelectric ceramic loading rod 35 can generate high-frequency excitation force under the drive of voltage, thereby realizing the normal cutter head 10 cutting force loading.

The power cutter head loading layer 25 described in the technical solution includes a rotary shaft 26, an electromagnetic loader 38, a pulley 39, a belt 40, a tension pulley 41, a power cutter head meshing hole 42, a power cutter head loading mechanism base 43 and a bearing seat 44. ;

The rotary shaft 26 connects two bearing housings 44 and the hole in the middle of the belt pulley 39, and the section where the rotary shaft 26 cooperates with the power cutter head 9 is processed with a power cutter head engagement hole 42, so that the power cutter head 9 and the rotary shaft 26 can cooperate ;

Link to each other by belt 40 between two pulleys 39;

The upper end of the tensioning wheel 41 is fixed on the bottom panel of the ordinary cutter head loading layer 24, and the lower end presses the belt 40 through the wheel hub with adjustable extension angle;

The tail of the electromagnetic loader 38 is installed on the loading mode switching bracket 27, and the loading end is connected with the bearing seat 44 of the rotary shaft.

The combined loading device 2 described in the technical solution also includes two sets of loading bracket bases 17, two sets of linear motion tables 19, and two sets of loading brackets 20;

The lower end of the loading bracket base 17 is connected with the horizontal iron 7, and the upper end of the loading bracket base 17 is connected with the loading bracket 20;

The linear motion table 19 includes a linear motion table base 45, a linear motion table table top 46, a linear motion table base leg 47, a linear motion table motor 18 and a linear motion table screw guide rail 48;

The loading mode switching bracket 27 is fixed on the table top 46 of the linear motion table;

The linear motion table motor 18 drives the linear motion table screw guide rail 48 to rotate, thereby driving the linear motion table table top 46 to perform reciprocating linear motion along the direction of the linear motion table screw guide rail 48 .

A pressure sensor is installed in the hub described in the technical solution to feed back the real-time pressure value to determine the tension of the belt 40; the load is applied to the pulley 39 through the belt 40 with adjustable tension and transmitted to the rotary shaft 26, Finally, the load is transmitted to the output shaft of the power cutter head 9 to realize a constant bending moment load applied to the power cutter head 9 .

The image detector 22 described in the technical solution is fixed between the support plates 21 of the two cutting force direction adjustment mechanisms; the image detector 22 is shared by two sets of piezoelectric ceramic cutting force loading mechanisms 23;

The image detector 22 can detect in real time the change of the position of the cross target artificially drawn on the surface of the cutter head, thereby detecting the performance parameters of the rotation accuracy of the tool holder; The tool holder is tested.

Compared with the prior art, the beneficial effects of the utility model are:

1. The utility model proposes a reliability test device for joint loading of two tool holders at the same time, which not only improves the efficiency of the tool holder reliability test, but also saves the test space and the equipment cost of the test device.

2. The utility model realizes the switching of the two loading modes of ordinary cutter head loading and power head loading through the ingenious way of layered automatic switching, and simultaneously detects the working conditions of the two tool holders through a set of image detection mechanisms, making the design integration degree High, high degree of automation.

3. The tool post power head loading method described in the utility model not only saves the cost of two dynamometers in the traditional test bench, but also makes the structure of the reliability test bench more compact. It can fully reflect the actual bending moment, torque and cutting vibration load of the tool holder power head.

Description of drawings

Fig. 1 is the overall structural diagram of the reliability test device of the double tool rest of joint loading described in the utility model;

Fig. 2 is an axonometric view of the double-turret mounting table device described in the present invention;

Fig. 3 is a side view of the joint loading device described in the utility model;

Fig. 4 is an axonometric view of the common cutter head loading layer in the combined loading device described in the present invention;

Fig. 5 is a side view of the loading layer of the power cutter head in the combined loading device described in the present invention;

Fig. 6 is a side view of the cutting force loading state described in the utility model;

Fig. 7 is a structural diagram of components for realizing the loading mode switching function in the combined loading device described in the present invention;

Fig. 8 is a schematic diagram of the working principle of the combined loading double tool holder reliability test device described in the present invention;

In the picture:

1. Tool post A, 2. Combined loading device, 3. Tool post B, 4. Control cabinet, 5. Data acquisition box, 6. Console, 7. Horizontal iron, 8. Double tool post installation device, 9. Power cutter head, 10. Ordinary cutter head, 11. Guide rail, 12. Screw rod, 13. Screw bearing seat, 14. Slider, 15. Tool holder base, 16. Servo motor, 17. Loading bracket base, 18. Linear motion table motor, 19. Linear motion table, 20. Loading bracket, 21. Cutting force direction adjustment mechanism support plate, 22. Image detector, 23. Piezoelectric ceramic cutting force loading mechanism, 24. Ordinary cutter head loading layer, 25. Power cutter head loading layer, 26. Rotary shaft, 27. Loading mode switching bracket, 28. Position adjustment groove, 29. Adjustment screw, 30. Feed control motor, 31. Cutting force direction adjustment frame, 32. Spiral movement Vice, 33. Piezoelectric ceramic loader base, 34. Pressure sensor, 35. Piezoelectric ceramic loading rod, 36. Cutting force inclination adjustment knob, 37. Hemispherical groove loading head, 38. Electromagnetic loader, 39. Pulley, 40. Belt, 41. Tensioning wheel, 42. Meshing hole of power cutter head, 43. Base of power cutter head loading mechanism, 44. Bearing seat, 45. Base of linear motion table, 46. Table top of linear motion table, 47. Linear motion Table base supporting legs, 48. linear motion table screw guide rails, 49. mounting holes.

detailed description

In conjunction with the accompanying drawings, the description is as follows:

Referring to Fig. 1, a device for performing reliability test on two power servo tool holders at the same time, which is controlled by two tool holders (knife holder A1, tool holder B3), double tool holder installation device 8, joint loading device 2, Cabinet 4, data acquisition box 5, console 6 and horizon iron 7.

The two knife rests are installed on the double knife rest mounting table device 8, and can move along the guide rails on the double knife rest mounting table device 8 driven by the servo motor 16. The joint loading device 2 is located above the double tool rest mounting table device 8 in terms of spatial arrangement, and is arranged between the two tool rests. Simultaneously simulate the loads of two tool holders during cutting, and test the performance of the tool holders.

The data acquisition box 5 is placed on the console 6, the input end of the data acquisition box 5 is connected with the image detector 22, and the output end of the data acquisition box 5 is connected in the computer of the console 6.

The console 6 includes a computer, a display, and components required for control, and realizes functions such as motion control, data display, and parameter recording of the entire double-turret reliability system.

The ground iron 7 plays the role of supporting the whole set of test bench.

Referring to Fig. 2, described double tool rest installation platform device 8 comprises two guide rails 11, two screw mandrels 12, two screw mandrel seats, eight slide blocks 14, two tool rest bases 15, two servo motors 16 . The function of the double tool rest mounting table device 8 is to install two power servo tool rests in a "face-to-face" form. The components are described as follows:

The two guide rails 11 are horizontally fixed on the base plate of the double tool rest mounting device 8, and the two screw mandrels 12 rotate under the drive of two servo motors 16. The way moves along the guide rail direction, and each knife rest base 15 bottom has four slide blocks 14 to play the role of support.

Referring to FIG. 3 , the combined loading device 2 includes loading bracket bases 17 (two), linear motion tables 19 (two), loading brackets 20 (two), and loading mode switching brackets 27 . The function realized by the combined loading device 2 is to load and detect the ordinary cutter head and the driven cutter head of the power tool holder, and automatically realize the switching between the two loading modes. Since the combined loading device 2 is a symmetrical structure, first half of the structure is described as follows:

The lower end of the loading bracket base 17 is connected with the horizontal iron 7 by bolts, and the upper end of the loading bracket base 17 is connected with the loading bracket 20 to support the entire combined loading device 2 .

Referring to FIG. 7 , the linear motion table 19 includes a linear motion table base 45 , a linear motion table table top 46 , a leg 47 of the linear motion table base and a screw guide rail 48 of the linear motion table. The legs 47 of the linear motion table base are installed on the side of the linear motion table base 45, and the linear motion table base 45 is fixed on the surface of the loading bracket 20 by means of bolts on the legs 47 of the linear motion table base. The linear motion table motor 18 drives the linear motion table screw guide rail 48 to rotate, thereby driving the linear motion table table top 46 to perform reciprocating linear motion along the direction of the linear motion table screw guide rail 48 . There are mounting holes 49 on both sides of the loading mode switching bracket 27, which are fixed in threaded holes on the table top 46 of the linear motion table by bolts. In this way, the linear motion table 19 can drive the entire loading mode switching bracket 27 to move up and down, and realize fast switching between different loading layers. The loading mode switch bracket 27 includes upper and lower layers, an ordinary cutter head loading layer 24 and a powered cutter head loading layer 25, which can respectively load the ordinary cutter head 10 and the powered cutter head 9 of the tool holder.

Referring to Fig. 3 and Fig. 4, the common cutter head loading layer 24 includes two sets of piezoelectric ceramic cutting force loading mechanisms 23, which respectively load the two tool holders. Except that the image detector 22 can be used in common, two sets of other components are required. A set is now described. One set of piezoelectric ceramic cutting force loading mechanism 23 includes cutting force direction adjustment mechanism support plate 21, image detector 22, position adjustment groove 28, adjustment screw 29, feed control motor 30, cutting force direction adjustment frame 31, spiral movement Vice 32, piezoelectric ceramic loader base 33, pressure sensor 34, piezoelectric ceramic loading rod 35, cutting force inclination adjustment knob 36, hemispherical groove loading head 37. They are described as follows:

The support plate 21 of the cutting force direction adjustment mechanism is fixed on the position adjustment groove 28 on the surface of the ordinary cutter head loading layer 24 by bolts, and can be manually adjusted to a suitable position and then locked with bolts. The supporting plate 21 of the cutting force direction adjustment mechanism plays the role of installing the piezoelectric ceramics loading cutting force loading mechanism 23 and adjusting the direction of the piezoelectric ceramics cutting force loading mechanism 23 .

The image detector 22 can detect in real time the change of the position of the artificially drawn cross target on the surface of the cutter head, so as to detect performance parameters such as the rotation accuracy of the cutter head. One image detector can be installed with two cameras to detect the two tool holders under test respectively.

The position adjustment groove 28 of the cutting force loading mechanism is located on the surface of the ordinary cutter head loading layer 24 support, the width of the groove is about 1 cm, and it provides guidance for the movement of the cutting force direction adjustment mechanism support plate 21.

The adjustment screw 29 itself is an adjustment shaft, one end is assembled with the hole on the support plate 21 of the cutting force direction adjustment mechanism, and the other end is fixed with the cutting force direction adjustment frame 31 through the shaft hole. Realize the direction adjustment around the adjustment knob 29 of the cutting force direction adjustment frame 31 and all components on the frame.

The feed control motor 30 is fixed on the tail end of the cutting force direction adjustment frame 31, the output shaft of the motor is connected with the helical motion pair 32, and the other end of the helical motion pair 32 is connected with the piezoelectric ceramic loader base 33 to realize the motor driving pressure. The electric ceramic loader base 33 reciprocates linearly to achieve the purpose of pre-tightening or loosening the piezoelectric ceramic loading rod 35 .

The cutting force direction adjustment frame 31 provides support for the feed control motor 30 , the piezoelectric ceramic loader base 33 , the pressure sensor 34 , the piezoelectric ceramic loading rod 35 , and the hemispherical groove loading head 37 . Simultaneously, the cutting force adjustment frame 31 can rotate around the cutting force inclination adjustment knob 36 to realize the direction adjustment of the components on the cutting force direction adjustment frame 31 .

One end of the piezoelectric ceramic loader base 33 is connected to the screw motion pair 32, and a pressure sensor 34 is installed on the other end. The piezoelectric ceramic loading rod 35 is connected to the piezoelectric sensor 34 , and the other end is provided with a hemispherical groove loading head 37 . Driven by voltage, the piezoelectric ceramic loading rod 35 can generate high-frequency excitation force. In this way, the cutting force applied to the common cutter head 10 is realized.

Referring to FIG. 5 , the power cutter head loading layer 25 includes a rotary shaft 26 , an electromagnetic loader 38 , a pulley 39 , a belt 40 , a tension pulley 41 , a power cutter head engaging hole 42 , a power cutter head loading mechanism base 43 and a bearing seat 44 . They are described as follows:

The rotary shaft 26 connects two bearing blocks 44 and the hole in the middle of the belt pulley 39 , and the section where the rotary shaft 26 cooperates with the power cutter head 9 is processed with a power cutter head engagement hole 42 so that the power cutter head 9 and the rotary shaft 26 cooperate. The two pulleys 39 are connected by a belt 40 to transmit power to each other, thereby replacing the torque loading mode of the traditional dynamometer, and realizing the simultaneous loading of the torque on the two tool holder power tool heads 9 .

The upper end of the tensioning wheel 41 is fixed on the bottom panel of the ordinary cutter head loading layer 24, and the lower end presses the pulley through the wheel hub with adjustable extension angle, wherein a pressure sensor is installed in the wheel hub to feed back the real-time pressure value, thereby determining the tension of the belt 40 force. The load is applied to the pulley 39 through the belt 40 with adjustable tension, and is transmitted to the rotary shaft 26, and finally the force is transmitted to the output shaft of the power cutter head 9, so that a constant bending moment load is applied to the power cutter head.

The bottom of the power cutter head loading mechanism base 43 is installed on the upper surface of the power cutter head loading layer 25 , and is connected with the bearing seat 44 through bolts, so as to fix and support the bearing seat 44 .

Referring to Fig. 3 and Fig. 5, the tail of the electromagnetic loader 38 is installed on the loading mode switching bracket 27, the loading end is connected with the bearing seat 44 of the rotary shaft, and the vibration excitation is applied to the bearing seat 44, so as to achieve the simulated cutting force. vibration conditions.

The input end of the control cabinet 4 described in this patent is connected to the console 6, and the output end is connected to the two tool rests, and the existing general program can be used to control the tool change movement and the rotary motion of the two tool rests.

Referring to Fig. 1 to Fig. 8, the working principle and process of the combined loading double-turret reliability test device described in the utility model are as follows:

First install the tool holder and test the test device. After the loading scheme is determined, the combined loading device 2 is controlled through the console 6 to move and load.

In the ordinary cutter head loading test, the loading mode switch bracket 27 is switched to the ordinary cutter head loading layer 24 . The two tool holders are loaded in the same way as below. The cutting force direction is comprehensively determined by the position adjustment groove 28 of the cutting force loading mechanism, the adjustment knob 29 and the cutting force inclination adjustment knob 36 . In the cutting force control mode, the feed control motor 30 drives the helical motion pair 32 to provide pre-tightening force to the piezoelectric ceramic loader base 33. When the pressure detected by the pressure sensor 34 reaches the static base value, the piezoelectric ceramic The loading rod 35 performs high-frequency dynamic loading.

In the process of switching to the power cutter head loading test, the two tool holders first move away from each other along the guide rail 11. After they are separated by 10 cm, the two tool holders are switched to the power cutter head loading mode under the operation of the console 6 . The loading mode switching bracket 27 is switched to the loading layer 25 of the power cutter head. The two tool rests move closer until the two powered cutter heads 9 cooperate with the driven cutter head engagement holes 42 . Manually adjust the tightness of the tensioning wheel to simulate the torque applied to the power cutter head 9 , and adjust the force and frequency of the electromagnetic loader 38 to apply an exciting force to the power cutter head 9 .

In the process of loading the common tool head and the driven tool head, the image detector 22 or other detection equipment can be used to detect the working state of the tool holder, so as to roughly evaluate the reliability of the two tool holders.

The examples described in this utility model are for the convenience of those skilled in the art to understand and apply the utility model, and the utility model is only an optimized example, or a better specific technical solution. If the relevant technicians adhere to the basic technical solution of the utility model, they can make equivalent structural changes or various modifications that do not require creative work, all within the protection scope of the utility model.

Claims (8)

1. a kind of double tool rest reliability test of combination loading, including two knife rests, double tool rests install table apparatus (8), connection Close loading device (2), switch board (4), data acquisition device (5) and console (6)；It is characterized in that：

Two knife rests are arranged on double tool rest and installed on table apparatus (8), the servomotor in double tool rest installs table apparatus (8) (16) moved under driving along the guide rail (11) in double tool rest installation table apparatus (8)；

The combination loading device (2) is located at double tool rest and installed above table apparatus (8), and is arranged between two knife rests, can Load suffered during two knife rests cuttings is simulated simultaneously, and the performance of cutter setting frame is detected；

Switch board (4) input is connected with console (6), and output end is connected with two knife rests；

The input of the data acquisition device (5) is connected with the Image detection instrument (22) in combination loading device (2), data acquisition The output end of case (5) is connected in the computer of console (6).

2. a kind of double tool rest reliability test of combination loading according to claim 1, it is characterised in that：

Described double tool rest, which installs table apparatus (8), also includes two screw mandrels (12), eight sliding blocks (14) and two tool rest brackets (15)；

The guide rail (11) is provided with two, and two guide rails (11) are horizontally fixed on double tool rest and installed on the bottom plate of table apparatus (8)；

The servomotor (16) be provided with two, two screw mandrels (12) being rotated by two servomotor (16), Four sliding blocks (14) are arranged at each tool rest bracket (15) bottom, and two knife rests are arranged on two tool rest brackets (15).

3. a kind of double tool rest reliability test of combination loading according to claim 1, it is characterised in that：

The combination loading device (2) includes loading mode switching support (27)；

Described loading mode switching support (27) is included two layers up and down, is common cutter head loading layer (24) and power-driven cutter head respectively Loading layer (25), the common cutter head (10) and power-driven cutter head (9) for being able to cutter setting frame is loaded.

4. a kind of double tool rest reliability test of combination loading according to claim 3, it is characterised in that：

The common cutter head loading layer (24) includes two sets of piezoelectric ceramics cutting force load maintainers (23)；

The piezoelectric ceramics cutting force load maintainer (23) includes cutting force direction adjusting mechanism support plate (21), adjustment spiral (29), feeding controlled motor (30), cutting force direction adjusting rack (31), screw secondary (32), piezoelectric ceramics loader base (33), pressure sensor (34), piezoelectric ceramics loading bar (35), cutting force tilt adjustment knob (36), hemisphere groove loading head (37)；

Described cutting force direction adjusting mechanism support plate (21), is fixed on the position adjustment groove on common cutter head loading layer (24) surface (28) on；

Described adjustment spiral (29) one end is assembled with the hole on cutting force direction adjusting mechanism support plate (21), the other end and cutting Force direction adjustment frame (31) is fixed by shaft hole matching；

Described feeding controlled motor (30) is fixed on the tail end of cutting force direction adjusting rack (31), and feeding controlled motor (30) is defeated Shaft is connected with screw secondary (32), and screw pair (32) other end is connected with piezoelectric ceramics loader base (33)；Institute Stating cutting force adjustment frame (31) can rotate around cutting force tilt adjustment knob (36)；

Described piezoelectric ceramics loader base (33) one end is connected with screw secondary (32), and the other end installs pressure sensor (34)；

Piezoelectric ceramics loading bar (35) is connected with piezoelectric transducer (34), and the other end is provided with hemisphere groove loading head (37)；Piezoelectricity Ceramic loading bar (35) can produce high-frequency excitation power under the driving of voltage, so as to realize the cutting to common cutter head (10) Power is loaded.

5. a kind of double tool rest reliability test of combination loading according to claim 3, it is characterised in that：

The power-driven cutter head loading layer (25) include gyroaxis (26), electromagnetism loader (38), belt pulley (39), belt (40), Tensioning wheel (41), power-driven cutter head engaging hole (42) and bearing block (44)；

The gyroaxis (26) connects the hole in the middle of two bearing blocks (44) and belt pulley (39), gyroaxis (26) and power knife Coordinate one section of head (9) is machined with a power-driven cutter head engaging hole (42), so as to matching somebody with somebody for power-driven cutter head (9) and gyroaxis (26) Close；

It is connected between two belt pulleys (39) by belt (40)；

Tensioning wheel (41) upper end is fixed on the bottom panel of common cutter head loading layer (24), and lower end is by can adjust stretching angle Wheel hub compress belt (40)；

Electromagnetism loader (38) afterbody is arranged on loading mode switching support (27), the bearing block of loading end and gyroaxis (44) it is connected.

6. a kind of double tool rest reliability test of combination loading according to claim 1, it is characterised in that：

Described combination loading device (2) also include two sets loading bracket bases (17), two sets move along a straight line platform (19), two sets add Carry support (20)；

Described loading bracket base (17) lower end is connected with ground black iron (7), loading bracket base (17) upper end and loading support (20) connect；

Described linear motion platform (19) includes linear motion platform table top (46), linear motion platform motor (18) and linear motion platform Screw mandrel guide rail (48)；

The loading mode switching support (27) is fixed on linear motion platform table top (46)；

The platform motor (18) that moves along a straight line drives linear motion platform screw mandrel guide rail (48) to rotate, so as to drive linear motion platform table top (46) linear reciprocating motion is done along linear motion platform screw mandrel guide rail (48) direction.

7. a kind of double tool rest reliability test of combination loading according to claim 5, it is characterised in that：

Pressure sensor is installed in the wheel hub, to feed back real-time pressure value, so that it is determined that the tensile force of belt (40)；Pass through Load is applied to belt pulley (39) by the belt (40) of adjustable tensile force, and is delivered to gyroaxis (26), most load transmission at last Onto the output shaft of power-driven cutter head (9), realize that the bending load constant to power-driven cutter head (9) applies.

8. a kind of double tool rest reliability test of combination loading according to claim 1, it is characterised in that：

Described Image detection instrument (22) is fixed between two cutting force direction adjusting mechanism support plates (21)；Described image inspection Instrument (22) is surveyed to be shared by two sets of piezoelectric ceramics cutting force load maintainers (23)；

Described Image detection instrument (22) can detect the change in location situation for the cross target artificially drawn on cutterhead surface in real time, So as to detect the rotating accuracy performance parameter of knife rest；One Image detection instrument installs two cameras, respectively to two tested knives Frame is detected.