A kind of linkage high-speed and high-efficiency vertical-horizontal conversion machining tool and its design method

Abstract

The present invention relates to a linkage high-speed and high-efficiency vertical-horizontal conversion machining tool and a design method, belonging to the technical field of machining equipment, and comprising a bed frame, a rotary table, two machine tool spindles, two five-axis motion devices and a numerical control device. A rotary table is arranged at the center of the bed frame; the machine tool spindle realizes the switching between the parallel or perpendicular states to the workbench plane through the rotary motion around the rotation center of the Z axis and the 45° B axis. The motion provided by the present invention for the spindle in the directions of the three linear coordinate axes of X, Y and Z, the C rotary coordinate axis and the 45° B rotary coordinate axis can meet the synchronous or asynchronous milling machining of the workpieces to be machined by the bilateral spindles in the vertical or horizontal position, such as the machining of integral blisk parts and cylindrical parts. Compared with the traditional five-axis machining tool, the invention has good structural rigidity, force balance and thermal symmetry, can avoid the problem of reduction of machining accuracy caused by multiple clamping of the workpiece, and doubles the machining efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of processing equipment, and particularly relates to a linkage high-speed and high-efficiency vertical-horizontal conversion machining tool and a design method thereof. Background Art

[0002] The five-axis linkage machining tool, also known as the five-axis machining tool, is a special processing equipment with high technological content and high precision, used for processing complex curved surfaces, and is the key means to solve the processing requirements of impellers, blades, marine propellers, heavy generator rotors, steam turbine rotors, large diesel engine crankshafts, etc. At present, the five-axis linkage machining tools on the market are generally divided into two types: vertical and horizontal, which are difficult to meet the requirement of full-process machining of workpieces with a single clamping. Multiple clamping of workpieces is likely to reduce the machining precision. And it is usually a single-spindle single-five-axis machining tool, which is very difficult to efficiently machine parts with small batches and long machining times. Summary of the Invention

[0003] In view of the above problems, the present invention provides a linkage high-speed and high-efficiency vertical-horizontal conversion machining tool and a design method thereof. It can realize the simultaneous machining of parts by two vertical-horizontal conversion spindles, solves the problem of reduced machining precision caused by multiple clamping of workpieces in the conventional five-axis machining tools in the prior art when machining parts such as complex curved surfaces, can improve the machining production efficiency of parts on the basis of ensuring the machining quality of parts, and reduce the machining cost.

[0004] The present invention provides a linkage high-speed and high-efficiency vertical-horizontal conversion machining tool, which includes a bed frame, a rotary table, 2 groups of five-axis motion components, and 2 groups of machining tools;

[0005] The bed frame includes a machining platform and a rail mounting frame; the rail mounting frame includes a first side and a second side; the machining platform is arranged between the first side and the second side; Y-axis guide rails are arranged on both the first side and the second side; the rotary table is arranged at the center of the machining platform;

[0006] One group of five-axis motion components is arranged on the Y-axis guide rail of the first side; the other group of five-axis motion components is arranged on the Y-axis guide rail of the second side;

[0007] The five-axis motion component includes a Y-axis moving part, an X-axis guide rail, an X-axis moving part, a Z-axis guide rail, a Z-axis moving part, a C-axis rotating part, a B-axis rotating part, a machine tool spindle, and a machining tool;

[0008] The C-axis rotating part is installed at the end of the Z-axis moving part, the B-axis rotating part is installed at the end of the C-axis rotating part at a first included angle, the machine tool spindle is arranged at the end of the B-axis rotating part at a second included angle, and the machining tool is arranged at the end of the machine tool spindle.

[0009] Optionally, the degrees of the first included angle and the second included angle are the same.

[0010] Optionally, the degrees of the first included angle and the second included angle are 45°.

[0011] Optionally, mounting holes are arranged inside the Y-axis moving member. Based on the mounting holes, the X-axis guide rail is arranged. The X-axis moving member is slidably arranged on the X-axis guide rail through a slider and slides on the X-axis guide rail.

[0012] Optionally, mounting holes are arranged inside the X-axis member. Based on the mounting holes, the Z-axis guide rail is arranged. The Z-axis moving member is slidably arranged on the Z-axis guide rail through a slider and slides on the Z-axis guide rail.

[0013] Optionally, a numerical control device is further included. The bed frame is electrically connected to the numerical control device. The numerical control device is used to input and control a numerical control program and respectively control two groups of five-axis motion components, and is used to switch the parallel or vertical state of the machine tool spindle.

[0014] On the other hand, the present invention also discloses a design method for a linkage high-speed and high-efficiency vertical-horizontal conversion machining machine tool,

[0015] which is used to design the aforementioned machining machine tool. The specific steps are as follows:

[0016] Step 1. Overall structure design of the machine tool;

[0017] Step 2. Dimension design of the double five-axis motion components based on the aforementioned overall structure of the machine tool;

[0018] Step 3. Selection of motors and controllers for each axis of the double five-axis motion components;

[0019] Step 4. Based on the selection of motors and controllers for each axis, mechanical structure modeling, electrical system modeling, and controller modeling are carried out for each axis;

[0020] Step 5. Based on the three models in Step 4, a dynamic model of the feed servo system for each axis is built;

[0021] Step 6. For the dynamic model of the feed servo system for each axis mentioned above, model parameter confirmation is carried out by means of estimation or look-up table, etc.;

[0022] Step 7. Model simulation is carried out to obtain a step response curve;

[0023] Step 8. According to the step response curves of each axis, the overshoot and steady-state error are calculated. If they exist, return to Step 6 to change the controller parameters in the model; if not, enter Step 9;

[0024] Step 9. According to the step response curves of each axis, the adjustment time of each axis is calculated. If the adjustment time is relatively large or the adjustment time gap between each axis is relatively large, return to Step 2 to modify the dimensions of each axis; if the adjustment time or the adjustment time gap meets the time threshold, enter Step 10;

[0025] Step 10. Machine tool manufacturing is carried out.

[0026] Compared with the prior art, the present invention has at least the following beneficial effects: By using the movements provided by the feed mechanism in the three linear coordinate axis directions of X, Y, and Z for the machine tool spindle, as well as the movements in the two rotational coordinate axis directions of C and B installed at a 45° angle thereto, it can meet the synchronous or asynchronous machining of workpieces by the bilateral spindles of the machine tool in a vertical or horizontal position.

[0027] The machine tool adopts a vertical and horizontal conversion spindle, which can perform milling on workpieces in a vertical or horizontal position, realizing full-process machining of workpieces with one-time clamping, and avoiding the problem of reduced machining accuracy caused by multiple clamping of workpieces. The machine tool adopts a fully enclosed symmetrical structure, with the structural characteristics of high rigidity and high stability. At the same time, through the numerical control processing program, symmetrical synchronous milling of workpieces is carried out by the two spindles on both sides, which can effectively improve the force characteristics during the machining process, improve the machining quality and machining efficiency of workpieces. The present invention can not only be used for rough machining, but is particularly suitable for finish machining, greatly improving the production and machining efficiency of parts, with the machining efficiency increased by more than 50%, and significantly improving the economic benefits. Brief Description of the Drawings

[0028] The drawings are only for the purpose of showing specific embodiments, and are not considered as a limitation to the present invention.

[0029] Figure 1 It is the front view of the machining machine tool of the present invention;

[0030] Figure 2 It is the top view of the machining machine tool of the present invention;

[0031] Figure 3 It is the side view of the machining machine tool of the present invention;

[0032] Figure 4 It is the design flow chart of the machining machine tool of the present invention;

[0033] Figure 5 It is the schematic diagram of the step response curve of the feed servo system.

[0034] Reference Signs:

[0035] 1. Bed frame, 2. Rotary table, 3. Workpiece to be machined, 4-1. Y-axis moving part, 5-1. X-axis moving part, 6-1. Z-axis moving part, 7-1. C-axis rotating part, 8-1. B-axis rotating part, 9-1. Machine tool spindle, 10-1. Machining tool, 11. Numerical control device, 12-1. Y-axis guide rail, 13-1. X-axis guide rail, 14-1. Z-axis guide rail. Detailed Embodiments

[0036] To more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. In addition, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0037] A specific embodiment of the present invention, such as Figures 1 - 5 , discloses a double-spindle double-five-axis linkage high-speed and high-efficiency vertical-horizontal conversion machining machine tool, including a bed frame 1, a rotary table 2, two groups of five-axis motion components and two machine tool spindles;

[0038] The bed frame 1 includes a machining platform and a rail mounting frame; the rail mounting frame includes a first side and a second side; the machining platform is arranged between the first side and the second side, and both the first side and the second side are perpendicular to the machining platform; on both the first side and the second side, two sets of 4 Y-axis guide rails 12-1 are symmetrically installed on the left and right through mounting holes, and the 4 Y-axis guide rails 12-1 are all perpendicular to the machining platform.

[0039] The rotary table 2 is arranged at the center of the machining platform. During use, the workpiece 3 to be machined is installed on the rotary table 2 through a fixture;

[0040] Further, the five-axis motion component includes a Y-axis motion part 4-1, an X-axis guide rail 13-1, an X-axis motion part 5-1, a Z-axis guide rail 14-1, a Z-axis motion part 6-1, a C-axis rotation part 7-1 and a B-axis rotation part 8-1; the five-axis motion component is arranged on two groups of Y-axis guide rails 12-1.

[0041] The two ends of the Y-axis motion part 4-1 are respectively slidably arranged on the left and right two groups of Y-axis guide rails 12-1 through sliders and slide on the Y-axis guide rails 12-1.

[0042] Preferably, as shown in the attached Figure 1 , two groups of linear motors are used for driving.

[0043] Installation holes are arranged inside the Y-axis motion part 4-1, and two groups of 4 X-axis guide rails 13-1 are symmetrically installed on the upper and lower sides through the installation holes. The upper and lower side surfaces of the X-axis motion part 5-1 are respectively slidably arranged on the upper and lower two groups of X-axis guide rails;

[0044] Preferably, as shown in the attached Figure 1 , two groups of linear motors are used for driving.

[0045] An installation hole is provided inside the X-axis moving part 5-1, and a total of 4 Z-axis guide rails 14-1 in two groups symmetrically arranged left and right are installed through the installation hole. The left and right side surfaces of the Z-axis moving part 6-1 are respectively slidably arranged on the left and right groups of Z-axis guide rails 14-1 through sliders;

[0046] Preferably, refer to the appendix Figure 1 , and two groups of linear motors are used for driving.

[0047] A C-axis rotating part 7-1 is installed at the end of the Z-axis moving part 6-1 close to the rotary table 2. The C-axis rotating part 7-1 rotates around the axis of the Z-axis moving part 6-1, and the rotation around the Z-axis is realized through a torque motor driving structure;

[0048] A B-axis rotating part 8-1 is installed at the end of the C-axis rotating part 7-1 at a 45° angle, so that the rotation center of the B-axis rotating part 8-1 forms a 45° angle with the axis of the Z-axis moving part 6-1, and the rotation is realized through the driving of a torque motor;

[0049] A machine tool spindle 9-1 is installed at the end of the B-axis rotating part 8-1 at a 45° angle, so that the axis of the machine tool spindle 9-1 forms a 45° angle with the rotation center of the B-axis rotating part 8-1;

[0050] Furthermore, through the rotation of the C-axis rotating part 7-1 and the B-axis rotating part 8-1, the state switching between the parallel and perpendicular states of the machine tool spindle 9-1 and the axis of the Z-axis moving part 6-1 can be realized;

[0051] A machining tool 10-1 for machining the workpiece 3 to be machined is provided at the end of the machine tool spindle 9-1.

[0052] Furthermore, it further includes a numerical control device 11. The bed frame 1 is electrically connected to the numerical control device 11. The numerical control device 11 is used to input and control a numerical control program and respectively control two groups of five-axis motion components to realize the machining operations of the machine tool spindles arranged on both sides of the machine tool for the workpiece 3 to be machined.

[0053] Preferably, the numerical control device 11 adopts a dual-channel control method to perform 5-axis linkage control on the five-axis motion devices on both sides respectively, and uses the rotary table 2 for indexing control, so as to realize the bilateral 6-axis 5-linkage of the workpiece 3 to be machined and perform synchronous or asynchronous milling machining.

[0054] Preferably, the bed frame adopts a four-gantry closed integral frame structure, which has high rigidity and high stability. The five-axis motion components installed on both sides of the bed structure frame adopt the same structure.

[0055] Furthermore, since a linear motor is adopted for direct drive, the intermediate mechanical transmission link is avoided, and each axis feed servo system has the advantages of fast feed speed and high precision. However, at the same time, the changes in cutting load and external disturbances directly act on the linear motor without any attenuation through the intermediate transmission link. The dynamic performance of each axis feed servo system will directly affect the machining quality of parts. Therefore, it is necessary to reasonably design the machine tool size during the machine tool design stage, and reasonably select the linear motor and controller to improve the dynamic performance of each axis feed servo system, and ultimately improve the machining efficiency of the machine tool and the machining quality of parts.

[0056] On the other hand of the present invention, referring to Figure 4 , a design method for the aforementioned linkage high-speed and high-efficiency vertical-horizontal conversion machining machine tool is also provided. The specific steps are as follows:

[0057] Step 1. Overall structure design of the machine tool;

[0058] Step 2. Dimension design of the double five-axis motion components based on the aforementioned overall structure of the machine tool;

[0059] Step 3. Selection of motors and controllers for each axis of the double five-axis motion components;

[0060] Step 4. Based on the selection of motors and controllers for each axis, mechanical structure modeling, electrical system modeling, and controller modeling are carried out for each axis;

[0061] Step 5. Based on the three models in Step 4, a dynamic model of each axis feed servo system is built;

[0062] Step 6. For the aforementioned dynamic model of each axis feed servo system, model parameter confirmation is carried out by means of estimation or look-up table, etc.;

[0063] Step 7. Model simulation is carried out on the Simulink tool in MATLAB to obtain the step response curve;

[0064] Step 8. According to the step response curve of each axis, the overshoot and steady-state error are calculated. If they exist, return to Step 6 to change the controller parameters in the model; if not, enter Step 9;

[0065] Step 9. According to the step response curve of each axis, the adjustment time of each axis is calculated. If the adjustment time is relatively large or the adjustment time gap between each axis is relatively large, return to Step 2 to modify the dimensions of each axis; if the adjustment time or the adjustment time gap meets the time threshold, enter Step 10;

[0066] Step 10. Machine tool manufacturing is carried out.

[0067] Further, in step 4, based on the selection of motors and controllers for each axis, the specific methods for mechanical structure modeling, electrical system modeling, and controller modeling of each axis are as follows. Taking the Z-axis moving part 6-1 as an example, a simplified modeling method for the dynamic model of the Z-axis feed servo system is shown, which mainly includes three parts: mechanical structure modeling including the Z-axis moving part 6-1, C-axis rotating part 7-1, B-axis rotating part 8-1, machine tool spindle 9-1, and machining tool 10-1; electrical system modeling of the Z-axis moving part 6-1 including structures such as the linear motor mover and stator; and controller modeling for controlling the movement of the linear motor in the Z-axis moving part 6-1.

[0068] Further, in terms of mechanical structure modeling, the mutual forces between mechanical structures are equivalently abstracted using a single-degree-of-freedom mass-damping system to determine the thrust of the linear motor of the moving part on the mechanical structure, and the expression is:

[0069]

[0070] where, represents the thrust of the linear motor of the Z-axis moving part 6-1 on the mechanical structure; represents the equivalent damping coefficient of the mechanical structure moving along the axis of the Z-axis moving part 6-1; represents the total mass of the mechanical structure; represents the actual position of the mechanical structure along the axis of the Z-axis moving part 6-1; represents the current moment.

[0071] Further, in terms of electrical system modeling, according to Kirchhoff's voltage law, the voltage balance equation expression in the armature is obtained as:

[0072]

[0073] where, represents the voltage of the armature winding of the linear motor stator; represents the resistance of the armature winding; represents the current of the armature winding; represents the inductance of the armature winding; represents the back electromotive force generated by the mover movement.

[0074] In addition, the back electromotive force generated by the mover movement is related to the movement speed, and the expression is:

[0075]

[0076] where, represents the back electromotive force coefficient of the motor.

[0077] In addition, the thrust It is mainly related to the armature winding current, and the expression is:

[0078]

[0079] where, represents the thrust coefficient of the motor.

[0080] Combining the above three equations, the voltage of the stator armature winding of the linear motor and the thrust of the linear motor on the mechanical structure The relationship is expressed as:

[0081]

[0082] Furthermore, in terms of controller modeling, a velocity feedforward control strategy is adopted, and the expression is:

[0083]

[0084] where, represents the position difference along the axis direction of the moving part 6-1 of the Z axis; represents the command position issued by the numerical control device 11 to the moving part 6-1 of the Z axis; represents the command speed during the control process; represents the position proportional gain; represents the speed difference during the control process; represents the actual speed of the linear motor in the moving part 6-1 of the Z axis; represents the position velocity feedforward; represents the command current during the control process; represents the speed proportional gain; represents the speed integral time constant; represents the current difference during the control process; represents the actual current of the linear motor in the moving part 6-1 of the Z axis; represents the current proportional gain; represents the current integral time constant.

[0085] Furthermore, for the moving part 4-1 of the Y axis, the moving part 5-1 of the X axis, the rotating part 7-1 of the C axis, and the rotating part 8-1 of the B axis, this method can be adopted to build the dynamic model of the feed servo system.

[0086] Furthermore, the feed servo system is essentially a time-domain system, and its stability and various performances can be analyzed in the time domain. Its position control loop should have the following performances: on the premise of no overshoot and finally accurately reaching the command position, the response to the command should be as fast as possible. Therefore, when analyzing its performance indicators, the overshoot and steady-state error As a basic prerequisite requirement, while taking the adjustment time as an index to measure its response efficiency. Among them, the overshoot , which represents the ratio of the maximum deviation between the output value and the steady-state value to the steady-state value; the steady-state error , which represents the difference between the steady-state value of the system and the input value when the time approaches infinity; the adjustment time , which represents the time when the response curve reaches and remains within the allowable range of the steady-state error , usually taking , as shown in Figure 5 .

[0087] Furthermore, based on the dynamic models of the feed servo systems of each axis mentioned above, the Simulink tool in MATLAB can be used to simulate and obtain the step response curve of the position control loop of the feed servo system, and then calculate the overshoot, steady-state error, and adjustment time. If there is overshoot or steady-state error, it may be that the controller parameters are set incorrectly, and the controller parameters should be appropriately changed so that there is no overshoot and no steady-state error. If the adjustment time is large, or the adjustment times of each axis vary greatly, it may be that the dynamic characteristics of a single axis are poor or the multi-axis servo is mismatched. On the premise of maintaining the stiffness of the machine tool, the dimensions of each axis of the machine tool should be appropriately modified, the mass of the moving parts should be reduced, or a linear motor that meets the requirements better should be selected.

[0088] Based on the above operations, the dynamic performance of the feed servo systems of each axis of the machine tool can be considered in the machine tool design stage, providing a reference basis for the machine tool dimension design and the selection of linear motors, ensuring that the dynamic performance of the machine tool meets the expected requirements during the actual machining process, and improving the machining efficiency of the machine tool and the machining quality of the parts.

[0089] The double-spindle double-five-axis linkage high-speed and high-efficiency vertical-horizontal conversion machining machine tool provided by the present invention, as shown in Figure 1 , can realize synchronous or asynchronous milling of the workpiece to be machined by the double spindles in a vertical or horizontal position. The workpiece 3 to be machined is fixed on the rotary table 2 through a fixture. The machine tool spindle realizes linear motion in the X, Y, and Z axial directions of the machine tool and rotation around the rotation centers of the Z axis and the 45° B axis through the X, Y, and Z axis axial movement devices and the C and B axis rotating components of the machine tool, and can machine the workpiece 3 to be machined in a vertical or horizontal position. The numerical control device 11 controls the numerical control machining program to realize the double-five-axis linkage motion of the machine tool, and further realizes synchronous or asynchronous milling of the workpiece 3 to be machined by the two side spindles of the machine tool in a vertical or horizontal position.

[0090] As described above, it is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A design method for a linked high-speed and efficient vertical-horizontal conversion machining tool, which is used to design a linked high-speed and efficient vertical-horizontal conversion machining tool, and is characterized in that, The linked high-speed and high-efficiency vertical-horizontal conversion machining tool includes a machine body frame, a rotary table, two sets of five-axis motion components, and two sets of machining tools. The machine body frame includes a machining platform and a rail mounting frame; the rail mounting frame includes a first side and a second side; the machining platform is disposed between the first side and the second side; Y-axis rails are provided on both the first side and the second side; the rotary table is disposed at the center of the machining platform. One set of five-axis motion components is disposed on the Y-axis rail of the first side; the other set of five-axis motion components is disposed on the Y-axis rail of the second side. The five-axis motion components include Y-axis moving parts, X-axis rails, X-axis moving parts, Z-axis rails, Z-axis moving parts, C-axis rotating parts, B-axis rotating parts, machine tool spindles, and machining tools. A C-axis rotating part is installed at the end of the Z-axis moving part, a B-axis rotating part is installed at the end of the C-axis rotating part at a first angle, a machine tool spindle is disposed at the end of the B-axis rotating part at a second angle, and a machining tool is disposed at the end of the machine tool spindle. The specific design steps are as follows: Step 1. Design the overall structure of the machine tool. Step 2. Based on the foregoing overall structure of the machine tool, perform the dimension design of the double five-axis motion components. Step 3. Select the motors and controllers for each axis of the double five-axis motion components. Step 4. Based on the selection of the motors and controllers for each axis, perform mechanical structure modeling, electrical system modeling, and controller modeling for each axis. In terms of performing mechanical structure modeling for each axis, use a single-degree-of-freedom mass-damping system to equivalently abstract the interaction forces between mechanical structures, and determine the thrust of the linear motor of the moving part on the mechanical structure. The expression is: Among them, represents the thrust of the linear motor of the Z-axis moving part on the mechanical structure; represents the equivalent damping coefficient of the mechanical structure moving along the axis of the Z-axis moving part; represents the total mass of the mechanical structure; represents the actual position of the mechanical structure along the axis of the Z-axis moving part; represents the current moment; In terms of performing electrical system modeling for each axis, according to Kirchhoff's voltage law, obtain the voltage balance equation in the armature. The expression is: Among them, represents the voltage of the stator armature winding of the linear motor; represents the armature winding resistance; represents the armature winding current; represents the armature winding inductance; represents the back electromotive force generated by the movement of the mover; In terms of performing controller modeling for each axis, adopt a velocity feedforward control strategy. The expression is: Among them, represents the position difference along the axis direction of the Z-axis moving component; represents the commanded position issued by the numerical control device to the Z-axis moving component; represents the commanded speed during the control process; represents the position proportional gain; represents the speed difference during the control process; represents the actual speed of the linear motor in the Z-axis moving component along the axis; represents the position speed feedforward; represents the commanded current during the control process; represents the speed proportional gain; represents the speed integral time constant; represents the current difference during the control process; represents the actual current of the linear motor in the Z-axis moving component; represents the current proportional gain; represents the current integral time constant; Step 5. Based on the three models in Step 4, build the dynamic model of the feed servo system for each axis. Step 6. Confirm the model parameters for the foregoing dynamic model of the feed servo system for each axis. Step 7. Perform model simulation to obtain the step response curve. Step 8. According to the step response curves of each axis, calculate the overshoot and steady-state error. If they exist, return to Step 6 and change the controller parameters in the model; if not, proceed to Step 9. Step 9. According to the step response curves of each axis, calculate the adjustment time of each axis. If the adjustment time is relatively large or the adjustment time difference between each axis is relatively large, return to Step 2 and modify the dimensions of each axis; if the adjustment time or the adjustment time difference meets the time threshold, proceed to Step 10. Step 10. Manufacture the machine tool.

2. The design method according to claim 1, characterized in that, The degrees of the first angle and the second angle are the same.

3. The design method according to claim 2, characterized in that The degrees of the first angle and the second angle are 45°.

4. The design method according to claim 1, wherein Installation holes are provided inside the Y-axis moving parts. Based on the installation holes, X-axis rails are provided. The X-axis moving parts are slidably disposed on the X-axis rails through sliders and slide on the X-axis rails.

5. The design method according to claim 1, characterized in that Installation holes are provided inside the X-axis parts. Based on the installation holes, Z-axis rails are provided. The Z-axis moving parts are slidably disposed on the Z-axis rails through sliders and slide on the Z-axis rails.

6. The design method according to claim 1, wherein It further includes a numerical control device, and the bed frame is electrically connected to the numerical control device. The numerical control device is used to input and control a numerical control program and respectively control two groups of five-axis motion components for switching the parallel or vertical state of the machine tool spindle.

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