A drilling and milling combined processing machine tool

Abstract

The present invention relates to the technical field of drilling and milling combined processing, and discloses a drilling and milling combined processing machine tool, comprising a slide rail, a rotating seat and a machine base. The rotating seat is located on both sides of the slide rail and is rotatably installed with a drilling component and a milling component respectively. The drilling component and the milling component can be rotated 90 degrees through the rotating seat to adapt to the side hole opening position of the universal joint cross-axis workpiece. The present invention changes the drilling and milling processing procedures of the universal joint cross-axis workpiece to meet the processing requirements and set corresponding clamping parts to adapt to the shape of the workpiece. The one-time clamping method of the clamp completes all drilling to avoid processing errors caused by multiple clamping. At the same time, the clamping part can exhaust and absorb metal chips generated by drilling and milling of the workpiece during the processing. At the same time, the air flow of the exhaust also cools the workpiece in real time to avoid the heat generated during the drilling process causing thermal deformation of the workpiece to affect the accuracy of the drilling and milling combined processing of the workpiece.

Description

Technical Field

[0001] The invention relates to the technical field of drilling and milling combined processing, and in particular to a drilling and milling combined processing machine tool. Background Art

[0002] Drilling and milling are two different processes for machining a workpiece. Drilling uses an up and down motion to cut the material, while milling uses a lateral motion. The main difference between milling and drilling is the speed. Drilling requires a low spindle speed, while milling requires a high spindle speed. Drilling is used to drill holes in metals, while milling is used to create a finished surface. The machining of a universal joint cross shaft requires a combination of drilling and milling.

[0003] like Fig. 9 As shown, the universal joint cross shaft 100 includes a first processing hole 101 and a second processing hole 102. The universal joint cross shaft has four ends. The four ends are provided with a first processing hole 101 that passes through the workpiece. The center of the universal joint cross shaft is provided with a second processing hole 102. The opening end of the first processing hole 101 needs to be milled to remove burrs generated by drilling.

[0004] The prior art discloses a universal joint cross-axis drilling and milling combination machine tool, with the announcement number CN105458705B. The invention includes a transverse guide rail, a drilling table, and a milling table. A manipulator assembly is provided on the transverse guide rail, four drilling shafts are provided on the drilling table, and a first drilling drill bit is provided on the drilling shaft. Four milling shafts are provided on the milling table, and a milling cutter is provided on the milling shaft. The invention can effectively position the universal joint cross shaft, and the positioning reference changes less times during the processing; it can effectively ensure the quality of the finished product, and the working process is continuous and efficient. However, the scheme still has the following technical problems: in the scheme, when the universal joint cross shaft is subjected to drilling and milling combination processing, the positioning reference changes, that is, there is a processing error. At the same time, the drilling and milling operations of the workpiece are performed separately, and position adjustment is required, which still leads to errors. Summary of the invention

[0005] The purpose of the present invention is to provide a technical solution to change the machining process of the universal joint cross shaft workpiece while reducing the machining error of the workpiece, so as to solve the problems in the prior art raised in the above background technology.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A drilling and milling combined processing machine tool, comprising:

[0008] A slide rail, a rotating seat and a machine base, wherein the rotating seat is installed at the bottom of the slide rail, a fixture for clamping a universal joint cross-axis workpiece is installed on the slider of the slide rail, and the rotating seat is located on both sides of the slide rail and is rotatably installed with a drilling assembly and a milling assembly, respectively. The drilling assembly and the milling assembly can be rotated 90 degrees through the rotating seat to adapt to the side opening position of the universal joint cross-axis workpiece;

[0009] The drilling assembly is provided with a composite drill bit, and the milling assembly is provided with a milling cutter. The drilling assembly and the milling assembly are adjusted to perform drilling and milling operations with the workpiece as the center. The composite drill bit is composed of a first drilling drill bit and a milling unit.

[0010] A second drilling drill bit and a lifting and lowering adjustable clamping member are installed on the machine base, the clamping member is used to clamp the workpiece to be processed, the second drilling drill bit corresponds to the opening at the center position of the workpiece, four groups of sleeve cylinders corresponding to the openings of the workpiece are arranged on the side of the clamping member, and a clearance hole for the second drilling drill bit to make way is opened on the clamping member, and the clamping member and the sleeve cylinder are both provided with an exhaust nozzle, which corresponds to the opening position of the workpiece.

[0011] Preferably, a first cavity is provided inside the sleeve cylinder, a clamping groove matching the shape of the upper part of the universal joint cross shaft workpiece is provided at the bottom of the clamping member, and a second cavity is provided at the bottom of the clearance hole of the clamping groove.

[0012] Preferably, the first cavity is arranged in an annular shape and is located at the four ends of the universal joint cross shaft workpiece, the first cavity corresponds to the end opening of the workpiece, and the second cavity is located at the bottom of the clearance hole, the second cavity corresponds to the central opening of the workpiece.

[0013] Preferably, the vacuum nozzle includes a first vacuum nozzle and a second vacuum nozzle, the first vacuum nozzle is arranged on the sleeve cylinder and connected to the first cavity, and the second vacuum nozzle is arranged on the clamping piece and connected to the second cavity; the first vacuum nozzle and the second vacuum nozzle are connected with vacuum pipes, and the vacuum pipes are connected to the vacuum source to realize the vacuum function.

[0014] Preferably, the sleeve cylinder is connected to the side surface of the pressing member through a connecting piece, and the connecting piece is arranged in an arc shape to adapt to the shape of the universal joint cross shaft workpiece.

[0015] Preferably, the first vacuum nozzle and the second vacuum nozzle respectively remove the drilling and milling metal chips generated inside the first cavity and the second cavity. The air flow generated by the vacuum nozzle while removing the metal chips also cools the universal joint cross-axis workpiece to reduce deformation of the workpiece.

[0016] Preferably, a telescopic push rod for adjusting the lifting and lowering of the clamping piece is installed on the machine base, and the clamping piece is connected to the piston rod end of the telescopic push rod through a mounting seat. A tool drive seat for driving a second drilling drill bit is also installed on the machine base.

[0017] Preferably, the rotating seat is installed on a machine tool base, and a driver for rotating the rotating seat is installed on the machine tool base to realize the rotational installation of the drilling assembly and the milling assembly. A rotating groove for rotational installation is provided between the machine tool base and the rotating seat, and limiting members are provided on both sides of the rotating groove to limit the position of the drilling assembly and the milling assembly for 90-degree rotation.

[0018] Preferably, a four-jaw clamp is installed on the slider of the slide rail, and a clamping block that fits the shape of the universal joint cross shaft workpiece is installed on the movable end of the four-jaw clamp; the drilling assembly and the milling assembly both include movable guide rails, and the movable guide rails of the two are respectively used for the movement drive of the composite drill bit and the milling tool.

[0019] The present invention also provides a drilling and milling combined processing machine tool, comprising the following drilling and milling combined operation steps:

[0020] Step 1: The slide rail carries the universal joint cross-axis workpiece to a defined position and is locked for a combined processing operation of drilling and milling;

[0021] Step 2: The clamping piece is pressed down to position the workpiece with the fixture, and the second drilling drill drills the workpiece from the top of the workpiece;

[0022] Step 3, after the second drilling drill bit is completed, it rises, and the composite drill bit and milling tool formed by the first drilling drill bit and the milling part are used to perform the first lateral drilling and milling operation on the workpiece;

[0023] Step 4: After the first drilling and milling operation is completed, the drilling assembly and the milling assembly are rotated 90 degrees, and a second lateral drilling and milling operation is performed on the workpiece. During this process, the clamping member always clamps the workpiece, and the vacuum nozzle continues to perform the vacuum operation.

[0024] Technical effects and advantages of the present invention: Compared with the prior art, the drilling and milling combined processing machine tool proposed by the present invention has the following advantages:

[0025] The present invention changes the machining procedures of drilling and milling of the universal joint cross-axis workpiece to meet the machining requirements while setting corresponding clamping parts to adapt to the shape of the workpiece. The one-time clamping of the clamp completes all drilling to avoid machining errors caused by multiple clamping. At the same time, the clamping part can exhaust and absorb metal chips generated by drilling and milling of the workpiece during the machining process. At the same time, the air flow of the exhaust also cools the workpiece in real time, avoiding thermal deformation of the workpiece caused by the heat generated during the drilling process, which affects the accuracy of the drilling and milling combined machining of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the top view of the structure of the drilling and milling combined processing machine tool of the present invention;

[0027] Figure 2 It is a front view structural schematic diagram of the drilling and milling combined processing machine tool of the present invention;

[0028] Figure 3 It is a three-dimensional structural schematic diagram of the drilling and milling combined processing machine tool of the present invention;

[0029] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0030] Figure 5 For the present invention Figure 3 A schematic diagram of the enlarged structure at B in the middle;

[0031] Figure 6 This is a schematic diagram of the structure of the telescopic push rod and the pressing member of the present invention;

[0032] Figure 7 This is a second schematic diagram of the structure of the telescopic push rod and the pressing member of the present invention;

[0033] Figure 8 This is one of the structural schematic diagrams of the clamping member and the universal joint cross shaft workpiece of the present invention;

[0034] Fig. 9 This is the second structural schematic diagram of the clamping member and the universal joint cross shaft workpiece of the present invention.

[0035] In the figure:

[0036] 100, universal joint cross shaft; 101, first processing hole; 102, second processing hole; 11, slide rail; 12, rotating seat; 13, drilling assembly; 14, milling assembly; 15, four-claw fixture; 16, compound drill bit; 161, first drilling drill bit; 162, milling part; 17, milling tool; 18, moving guide rail; 19, machine tool base; 110, rotating slot; 111, limiter;

[0037] 21. Machine base; 22. Telescopic push rod; 23. Tool drive base; 24. Second drilling drill bit; 25. Mounting base; 26. Pressing member; 27. Connecting member; 28. Sleeve cylinder; 29. ​​First exhaust nozzle; 210. Second exhaust nozzle; 211. Clearance hole; 212. Pressing groove; 213. Exhaust pipe; 214. First cavity; 215. Second cavity. DETAILED DESCRIPTION

[0038] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that the discussion of these implementations is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Various examples may omit, replace, or add various processes or components as needed. In addition, the features described in some examples may also be combined in other examples.

[0039] The invention provides Figures 1 to 3 As shown, a drilling and milling combined processing machine tool comprises:

[0040] A slide rail 11, a rotating seat 12 and a machine base 21, wherein the rotating seat 12 is installed at the bottom of the slide rail 11, a fixture for clamping a universal joint cross-axis workpiece is installed on the slider of the slide rail 11, and a drilling assembly 13 and a milling assembly 14 are rotatably installed on both sides of the slide rail 11. The drilling assembly 13 and the milling assembly 14 can be rotated 90 degrees through the rotating seat 12 to adapt to the side opening position of the universal joint cross-axis workpiece;

[0041] like Figure 4 and Figure 5 As shown, a composite drill bit 16 is installed on the drilling assembly 13, and a milling tool 17 is installed on the milling assembly 14. The drilling assembly 13 and the milling assembly 14 are adjusted to perform drilling and milling positions with the workpiece as the center. The composite drill bit 16 is composed of a first drilling drill bit 161 and a milling part 162.

[0042] A second drilling bit 24 and a lifting and lowering adjustable clamping member 26 are installed on the machine base 21. The clamping member 26 is used to clamp the workpiece to be processed. The second drilling bit 24 corresponds to the opening at the center of the workpiece. Four groups of sleeve cylinders 28 corresponding to the openings of the workpiece are arranged on the side of the clamping member 26. A clearance hole 211 for the second drilling bit 24 to make way is opened on the clamping member 26. The clamping member 26 and the sleeve cylinder 28 are both provided with an exhaust nozzle, which corresponds to the opening position of the workpiece.

[0043] Working principle: The machine tool of the invention integrates the slide rail 11, the rotating seat 12 and the machine base 21 to create a single platform that can perform drilling and milling operations at the same time, reducing the need to transfer the workpiece between different devices; the rotating component is positioned, the drilling component 13 and the milling component 14 can rotate 90 degrees around the rotating seat 12 to meet the need for opening holes on the side of the universal joint cross axis workpiece, thereby enhancing the flexibility of processing; the multi-functional drill bit design, the composite drill bit 16 combines the punching and milling functions, so that drilling and milling can be completed in a continuous process, improving the working efficiency; the central symmetry adjustment mechanism, the drilling and milling components 14 are adjusted around the center of the workpiece to ensure accurate alignment during the processing; the integrated clamping and exhaust functions, the clamping member 26 on the machine base 21 not only The workpiece is fixed, and an exhaust nozzle is integrated to remove metal chips generated during processing and reduce the temperature of the workpiece, thereby reducing thermal deformation; the processing accuracy is improved, and the cumulative error in the processing process is reduced by reducing the use of workpiece transfer and the composite drill 16, thereby improving the processing accuracy; the operating efficiency is enhanced, and the integrated drilling and milling functions reduce the processing steps, shorten the production cycle, and improve the production efficiency; the heat effect is reduced, and the synergistic effect of the clamping piece 26 and the exhaust nozzle effectively controls the heat effect during the processing and protects the integrity of the workpiece; the operation process is simplified, and the design of the machine tool simplifies the operation process, allowing the operator to quickly adjust and perform precise processing; the applicability is enhanced, and the design of the machine tool allows it to adapt to universal joint cross shaft workpieces of different shapes, thereby improving the applicability and flexibility of the equipment;

[0044] like Figure 8 and Fig. 9 As shown, in order to fit the shape of the universal joint cross shaft workpiece to be processed and realize the corresponding fixture and metal chip suction function, the sleeve cylinder 28 is provided with a first cavity 214 inside, and the bottom of the clamping member 26 is provided with a clamping groove 212 adapted to the upper shape of the universal joint cross shaft workpiece, and the clamping groove 212 is provided with a second cavity 215 at the bottom of the clearance hole 211. Figure 1 and Fig. 9 As shown, the first cavity 214 is set to be annular and is located at the four ends of the universal joint cross shaft workpiece, and the first cavity 214 corresponds to the end opening of the workpiece. The second cavity 215 is located at the bottom of the clearance hole 211, and the second cavity 215 corresponds to the central opening of the workpiece.

[0045] like Figure 8As shown, in order to target the two positions of drilling and milling of the workpiece, the exhaust nozzle includes a first exhaust nozzle 29 and a second exhaust nozzle 210, the first exhaust nozzle 29 is arranged on the sleeve cylinder 28 and is connected to the first cavity 214, the second exhaust nozzle 210 is arranged on the clamping piece 26 and is connected to the second cavity 215; the first exhaust nozzle 29 and the second exhaust nozzle 210 are connected with an exhaust pipe 213, and the exhaust pipe 213 is connected to an exhaust source to realize the exhaust function.

[0046] like Figure 6 and Figure 7 As shown, the pressing member 26 is adapted according to the shape of the universal joint cross shaft workpiece, and the sleeve cylinder 28 is connected to the side of the pressing member 26 through the connecting member 27, and the connecting member 27 is set to an arc shape to adapt to the shape of the universal joint cross shaft workpiece. Figure 6 As shown, the first vacuum nozzle 29 and the second vacuum nozzle 210 respectively remove the drilling and milling metal chips generated inside the first cavity 214 and the second cavity 215. The air flow generated by the vacuum nozzle while removing the metal chips cools the universal joint cross shaft workpiece to reduce the deformation of the workpiece.

[0047] Figures 1 to 3 As shown, a telescopic push rod 22 for adjusting the lifting and lowering of a pressing member 26 is installed on the machine base 21, and the pressing member 26 is connected to the piston rod end of the telescopic push rod 22 through a mounting seat 25. A tool driving seat 23 for driving a second drilling drill 24 is also installed on the machine base 21. The rotating seat 12 is installed on a machine tool base 19, and a driver for rotating the rotating seat 12 is installed on the machine tool base 19 to realize the rotational installation of the drilling assembly 13 and the milling assembly 14. A rotating groove 110 for rotational installation is provided between the machine tool base 19 and the rotating seat 12, and limit members 111 are provided on both sides of the rotating groove 110 to limit the position limit of the drilling assembly 13 and the milling assembly 14 for 90-degree rotation.

[0048] like Figure 1 and Figure 4 As shown, specifically, a four-jaw clamp 15 is installed on the slider of the slide rail 11, and a clamp block that fits the shape of the universal joint cross shaft workpiece is installed on the movable end of the clamp; the drilling component 13 and the milling component 14 both include a movable guide rail 18, and the movable guide rails 18 of the two are used for moving and driving the compound drill bit 16 and the milling tool 17 respectively.

[0049] The present invention also provides a drilling and milling combined processing machine tool, comprising the following drilling and milling combined operation steps:

[0050] Step 1, the slide rail 11 carries the universal joint cross-axis workpiece to a defined position and is locked for a combined processing operation of drilling and milling;

[0051] Step 2, the pressing member 26 is pressed down to fit the fixture to position the workpiece, and the second drilling drill 24 drills a hole in the workpiece from the top of the workpiece;

[0052] Step 3, after the second drilling drill bit 24 is finished drilling, the composite drill bit 16 and the milling tool 17 composed of the first drilling drill bit 161 and the milling part 162 perform the first lateral drilling and milling operation on the workpiece;

[0053] Step 4: After the first drilling and milling operation is completed, the drilling assembly 13 and the milling assembly 14 rotate 90 degrees to perform a second lateral drilling and milling operation on the workpiece. During this process, the clamping member 26 always clamps the workpiece, and the exhaust nozzle continues to perform the exhaust operation.

[0054] In summary, the present invention also has the following comprehensive effects. The machine tool of the present invention integrates the slide rail 11, the rotating seat 12 and the machine base 21. Through this design, the drilling and milling operations of the universal joint cross-axis workpiece can be completed on the same machine tool, reducing the need to transfer the workpiece between different machine tools, thereby reducing the processing errors caused by multiple positioning; the integration of the composite drill bit 16 and the milling tool 17, the drilling assembly 13 is equipped with a composite drill bit 16, which is composed of a first punching drill bit 161 and a milling part 162, so that drilling and milling can be completed in one step, improving processing efficiency and reducing processing errors; the angular rotation function of the rotating seat 12, The drilling assembly 13 and the milling assembly 14 can be rotated at an angle through the rotating seat 12 to adapt to the side opening position of the universal joint cross-axis workpiece to ensure the accuracy of processing; the clamping member 26 and the exhaust system, the machine base 21 is equipped with a second drilling drill bit 24 and a clamping member 26 that can be raised and lowered. The clamping member 26 is used to clamp the workpiece to be processed, and is also provided with an exhaust nozzle corresponding to the opening position of the workpiece, which is used to suck metal chips and cool down to reduce deformation of the workpiece; precise positioning and clamping, a four-jaw clamp 15 is installed on the slider of the slide rail 11, and a clamping block that fits the shape of the universal joint cross-axis workpiece is installed on the movable end of the clamp to ensure the stability and accuracy of the workpiece during processing.

[0055] Reducing machining errors: Through the integrated machining machine tool design and the use of the composite drill bit 16, machining errors caused by multiple clamping and transfer of workpieces are reduced; improving machining efficiency: drilling and milling operations can be completed in one process, reducing machining time and cost; controlling workpiece deformation: the clamping member 26 clamps the workpiece during machining, while the exhaust system removes metal chips and cools down, effectively controlling the workpiece deformation caused by heat and improving machining accuracy; easy operation: through the design of the slide rail 11 and the rotating seat 12, the operator can easily adjust the workpiece position and perform precise drilling and milling operations; strong adaptability: the machine tool design takes into account the shape adaptation of the workpiece, so that the machine tool can adapt to universal joint cross-axis workpieces of different shapes, and has good versatility and adaptability;

[0056] The above describes an embodiment of the present invention, but this embodiment is not limited to the above specific implementation methods. The above specific implementation methods are merely illustrative and not restrictive. Under the guidance of this embodiment, ordinary technicians in this field can also make many forms, all of which are protected by this embodiment.

Claims

1. A drilling and milling combined processing machine tool, characterized in that: include: A slide rail (11), a rotating seat (12) and a machine base (21), wherein the rotating seat (12) is mounted at the bottom of the slide rail (11), a fixture for clamping a universal joint cross-axis workpiece is mounted on the slider of the slide rail (11), and a drilling assembly (13) and a milling assembly (14) are rotatably mounted on both sides of the slide rail (11), and the drilling assembly (13) and the milling assembly (14) can be rotated 90 degrees through the rotating seat (12) to adapt to the side opening position of the universal joint cross-axis workpiece; The drilling assembly (13) is mounted with a composite drill bit (16), and the milling assembly (14) is mounted with a milling cutter (17); the drilling assembly (13) and the milling assembly (14) are adjusted in position for drilling and milling with the workpiece as the center; the composite drill bit (16) is composed of a first drilling drill bit (161) and a milling portion (162); The machine base (21) is provided with a second drilling bit (24) and a lifting and adjusting clamping member (26), the clamping member (26) being used to clamp a workpiece to be processed, the second drilling bit (24) corresponding to an opening at the center of the workpiece, the side of the clamping member (26) is provided with four sets of sleeve cylinders (28) corresponding to the openings of the workpiece respectively, the clamping member (26) is provided with a clearance hole (211) for the second drilling bit (24) to make way, the clamping member (26) and the sleeve cylinder (28) are both provided with an air suction nozzle, the air suction nozzle corresponding to the opening position of the workpiece; A first cavity (214) is provided inside the sleeve cylinder (28); a clamping groove (212) adapted to the shape of the upper portion of the universal joint cross shaft workpiece is provided at the bottom of the clamping member (26); the clamping groove (212) is located at the bottom of the clearance hole (211) and a second cavity (215) is provided; the first cavity (214) is arranged in an annular shape and is located at the four ends of the universal joint cross shaft workpiece; the first cavity (214) corresponds to the end opening of the workpiece; the second cavity (215) is located at the bottom of the clearance hole (211) , the second cavity (215) corresponds to the central opening of the workpiece; the exhaust nozzle comprises a first exhaust nozzle (29) and a second exhaust nozzle (210), the first exhaust nozzle (29) is arranged on the sleeve cylinder (28) and is connected to the first cavity (214), and the second exhaust nozzle (210) is arranged on the pressing member (26) and is connected to the second cavity (215); the first exhaust nozzle (29) and the second exhaust nozzle (210) are connected to an exhaust pipe (213), and the exhaust pipe (213) is connected to an exhaust source to realize an exhaust function; The sleeve cylinder (28) is connected to the side surface of the pressing member (26) via a connecting member (27), and the connecting member (27) is arranged in an arc shape to adapt to the shape of the universal joint cross shaft workpiece; the first exhaust nozzle (29) and the second exhaust nozzle (210) respectively remove the drilling and milling metal chips generated inside the first cavity (214) and the second cavity (215), and the air flow generated by the exhaust nozzle while removing the metal chips cools the universal joint cross shaft workpiece, thereby reducing the deformation of the workpiece; The rotating seat (12) is mounted on a machine tool base (19); a driver for rotating the rotating seat (12) is mounted on the machine tool base (19) to realize the rotational installation of the drilling assembly (13) and the milling assembly (14); a rotating groove (110) for rotational installation is provided between the machine tool base (19) and the rotating seat (12); and limiting members (111) are provided on both sides of the rotating groove (110) to limit the position of the drilling assembly (13) and the milling assembly (14) for 90-degree rotation.

2. A drilling and milling combined machining machine according to claim 1, characterized in that: A telescopic push rod (22) for adjusting the lifting and lowering of a pressing member (26) is mounted on the machine base (21); the pressing member (26) is connected to the piston rod end of the telescopic push rod (22) via a mounting seat (25); and a tool drive seat (23) for driving a second drilling drill bit (24) is also mounted on the machine base (21).

3. The drilling and milling combined machining machine tool according to claim 2, characterized in that: A four-jaw clamp (15) is installed on the slider of the slide rail (11), and a clamp block that fits the shape of a universal joint cross shaft workpiece is installed on the movable end of the clamp of the four-jaw clamp (15); the drilling component (13) and the milling component (14) both include a movable guide rail (18), and the movable guide rails (18) of the two are respectively used for moving and driving the composite drill bit (16) and the milling tool (17).

4. The drilling and milling combined machining machine tool according to claim 1, characterized in that: The drilling and milling combined operation steps are as follows: Step 1, the slide rail (11) carries the universal joint cross-axis workpiece to a defined position and is locked for a combined machining operation of drilling and milling; Step 2, the pressing member (26) is pressed down to fit the fixture to position the workpiece, and the second drilling drill (24) drills a hole in the workpiece from the top of the workpiece; Step 3: After the second drilling drill bit (24) has completed drilling, it rises, and the composite drill bit (16) and the milling tool (17) formed by the first drilling drill bit (161) and the milling part (162) perform a first lateral drilling and milling operation on the workpiece; Step 4: After the first drilling and milling operation is completed, the drilling assembly (13) and the milling assembly (14) are rotated 90 degrees to perform a second lateral drilling and milling operation on the workpiece. During this process, the clamping member (26) always clamps the workpiece, and the exhaust nozzle continues to perform an exhaust operation.

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