Drilling machine for machining

Abstract

The invention relates to the technical field of drilling machines, in particular to a drilling machine for machining, which comprises a base, a stand column, a cross beam and a drilling frame, the drilling frame is of a U-shaped structure, a rotating disc is rotatably connected to the drilling frame, and a drilling machine is slidably arranged on the rotating disc; the drilling machine comprises a drilling machine base, a drill bit mounting base and a driving rod, the drill bit mounting base is rotationally arranged on the drilling machine base, the driving rod is rotationally arranged on the rotating disc, the upper end of the driving rod is connected with a driving device, the lower end of the driving rod is in spline connection with the drill bit mounting base, and a drill bit is connected to the drill bit mounting base; the drilling machine base is fixedly connected with a rack through a connecting rod, the rotating shaft is rotationally sleeved with a driving sleeve, and one end of the driving sleeve is fixedly connected with a driving gear meshed with the rack. By arranging the rotating disc which can rotate around the U-shaped drilling frame and is driven by the worm gear and the worm, adjustment of the working angle of the drill bit and self-locking positioning are achieved. And therefore, the drilling machine can drill the flange plates at different angles.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drilling machines, in particular to a drilling machine for machining. BACKGROUND

[0002] The valve body is a key component in the industrial pipeline system, and a flange plate is usually provided at the end of the valve body. A plurality of connecting holes are drilled on the flange plate to connect with other pipelines through bolts. The existing drilling machine for machining has the following technical problems when drilling the flange plate: First, the universality is poor. The axis direction of the drill bit of most drilling machines is fixed, and the drilling machine can usually only drill the flange plate with a vertical axis. When the valve body has an inclined or special-shaped structure, for example, a downward-expanding discharge valve, the axis of the flange plate is inclined, and the existing conventional drilling machine cannot effectively process the flange plate, or needs to be assisted by complex tooling for positioning. The operation is complicated, and the machining precision and efficiency are low.

[0003] Second, the multi-hole machining efficiency is low. For a flange plate with multiple holes, the traditional single-bit drilling machine can only complete the machining of one hole after clamping once. The position of the workpiece or the position of the drill bit needs to be manually adjusted for each subsequent hole. The frequent positioning operation is time-consuming and laborious, the machining efficiency is low, and the accumulated error of the position precision between the holes is increased due to multiple positioning.

[0004] Therefore, it is necessary to improve the existing technology. SUMMARY

[0005] In order to overcome the deficiencies in the prior art, a drilling machine for machining is provided, which can adapt to the machining of flange plates with different axis directions and can simultaneously perform multi-hole drilling.

[0006] In order to solve the above technical problems, the technical scheme adopted by the present application is as follows: A drilling machine for machining, comprising a base, a column, a cross beam and a drilling frame, the column is fixedly arranged on the base, the cross beam is slidably arranged on the column, a height adjusting mechanism is arranged between the cross beam and the column, and the drilling frame is fixedly arranged on the cross beam. The drilling frame is a U-shaped structure, a rotating disc is rotatably connected to the drilling frame through a rotating shaft, a drill rig is slidably arranged on the rotating disc, a worm gear is arranged on the outer ring surface of the rotating disc, and a worm is rotatably arranged on the drilling frame and engaged with the worm gear. The drill rig comprises a drill rig base, a drill bit mounting seat and a driving rod, the drill bit mounting seat is rotatably arranged on the drill rig base, the driving rod is rotatably arranged on the rotating disc, a driving device is connected to the upper end of the driving rod, the lower end of the driving rod is inserted into the drill bit mounting seat and is connected with the drill bit mounting seat through a spline, and a drill bit is connected to the drill bit mounting seat. The drill base is fixedly connected with a rack through a connecting rod, and the side wall of the rotating disc is provided with a sliding groove for the sliding of the connecting rod and the rack.

[0007] Preferably, the driving device comprises a motor, a first belt driving structure, a second belt driving structure and a transmission rod, the transmission rod is rotatably arranged on the rotating disc, one end of the transmission rod is fixedly connected with a first bevel gear, a second bevel gear meshing with the first bevel gear is fixedly connected on the driving rod, the motor is fixedly arranged on one side of the cross beam close to the stand, a driving shaft is directly or indirectly connected with the motor shaft of the motor, a connecting rod I is rotatably connected on the driving shaft, a connecting rod II is rotatably connected on the transmission rod, the ends of the connecting rod I and the connecting rod II close to each other are hingedly connected through an intermediate shaft, and a rotating sleeve is rotatably sleeved on the intermediate shaft. The first belt driving structure is arranged between the driving shaft and the rotating sleeve, and the second belt driving structure is arranged between the transmission rod and the rotating sleeve.

[0008] Preferably, a gearbox is arranged between the motor and the driving shaft.

[0009] Preferably, a mounting plate is slidably arranged on the upper end of the base, a positioning device and a clamping device are arranged on the mounting plate, and a linear actuator is arranged between the mounting plate and the base.

[0010] Preferably, the positioning device comprises a positioning column, a driving gear and a driving gear ring, the driving gear ring is rotatably arranged on the mounting plate, a driving shaft is rotatably arranged on the mounting plate, a small gear meshing with the driving gear ring is connected to the lower end of the driving shaft, and a knob is connected to the upper end of the driving shaft. The positioning column is arranged in a circumferential array relative to the driving gear ring, three sliding grooves are formed in the mounting plate, a sliding block is slidably arranged in each of the three sliding grooves, the three positioning columns are arranged on the three sliding blocks, a tooth is arranged on one side of each sliding block, each sliding block is matched with a transmission gear meshing with the tooth, and the transmission gears are all meshed with the driving gear ring.

[0011] Preferably, the clamping device comprises an L-shaped supporting column, a pressing bolt and a pressing block, the L-shaped supporting column is slidably arranged on the mounting plate, the pressing bolt is threadedly connected to the L-shaped supporting column and penetrates through the L-shaped supporting column, and the pressing block is rotatably arranged at the lower end of the pressing bolt.

[0012] Preferably, the drill bit comprises a drill rod and first and second mounting plates, the first and second mounting plates are rotatably connected and provided with a locking mechanism, a plurality of guide grooves I are uniformly arranged on the first mounting plate, a plurality of guide grooves II matched with the guide grooves I are arranged on the second mounting plate, and the guide grooves II and the guide grooves I are arranged in a cross manner. A hollow guide block I is slidably arranged in each guide slot I, and a hollow guide block II is slidably arranged in each guide slot II, the hollow guide block I is rotationally connected with a power sleeve, the power sleeve is rotationally connected with the corresponding hollow guide block II, and the power sleeve is provided with an interface for mounting a drill rod; Two connecting plates are hingedly connected between the adjacent two power sleeves, the two connecting plates are hingedly connected through a hinge shaft, a rotating sleeve is rotationally sleeved on the hinge shaft, and the power sleeve and the corresponding rotating sleeve are transmissionally connected through a belt mechanism. The first mounting plate is connected with a drill bed, a transmission sleeve is rotationally arranged in the middle of the first mounting plate and is circumferentially limited with the drill bit mounting seat, and the transmission sleeve and one of the power sleeves are transmissionally connected through two sets of belt mechanisms.

[0013] Preferably, the drilling frame is provided with a limiting structure for positioning the vertical state of the drill.

[0014] Preferably, the height adjusting mechanism comprises a lead screw rotationally arranged on the stand column, and the lead screw is threadedly connected with the cross beam.

[0015] Compared with the prior art, the present application has the following beneficial effects: 1. The present application adjusts and self-locks the drilling angle by arranging the U-shaped drilling frame and the rotating disc driven by the worm gear, so that the drill bed can not only perform conventional drilling on the flange plate with an axis vertical, but also can conveniently adjust the drill bit to an arbitrary inclination angle, accurately process the flange plate with an axis inclined, expand the process range of the drill bed, and meet the processing requirements of complex special-shaped valve bodies.

[0016] 2. The drill bit assembly of the present application can flexibly adjust the relative positions of multiple drill rods (such as four or six) through the first mounting plate, the second mounting plate and the cross guide slot structure, cooperates with the slidable hollow guide block and the power sleeve, so as to adapt to the circumferential distribution of holes on flange plates of different diameters. At the same time, through the double connecting rod-belt combination transmission system, the power is stably and synchronously transmitted from one central transmission sleeve to all position-adjustable drill rods, so as to realize one-time synchronous drilling of multiple connecting holes of the flange plate, greatly improve the processing efficiency, and ensure the coaxiality and position accuracy among the multiple holes.

[0017] 3. The present application designs a special driving device composed of a first belt driving structure, a second belt driving structure and an intermediate hinged connecting rod to solve the problem of change of power transmission path when the drill bit angle is adjusted. The structure can adaptively compensate for the change of the distance between the transmission rod and the driving shaft when the rotating disc rotates, effectively prevents power interruption or transmission interference, and ensures that the motor power can be continuously and smoothly transmitted to the drill bit at any working angle. BRIEF DESCRIPTION OF DRAWINGS

[0018] The specific embodiments of the present application will be further described in detail below with reference to the drawings.

[0019] Figure 1 Structure diagram of the invention when installing single drill rod; Figure 2 Structure diagram of the drilling frame; Figure 3 Structure diagram of the rotating disc; Figure 4 Structure diagram of the drill holder; Figure 5 Sectional view of the drill holder; Figure 6 Structure diagram of the invention when installing multiple drill rods; Figure 7 Exploded view of the drill bit holder and the first mounting plate; Figure 8 Exploded view of the first mounting plate and the second mounting plate; Figure 9 Structure diagram of the belt mechanism; Figure 10 Structure diagram of the mounting plate from below; Figure 11 Exploded view of the mounting plate and the gear ring.

[0020] In the figure: 1 - base; 11 - mounting plate; 12 - linear driver; 2 - upright column; 3 - cross beam; 4 - drilling frame; 41 - rotating shaft; 42 - rotating disc; 43 - drill holder; 44 - drill bit holder; 45 - driving rod; 46 - connecting rod; 47 - rack; 48 - driving sleeve; 49 - driving gear; 412 - worm; 5 - height adjustment mechanism; 6 - driving device; 61 - motor; 62 - first belt driving structure; 63 - second belt driving structure; 64 - transmission rod; 65 - first bevel gear; 66 - driving shaft; 67 - connecting rod I; 68 - connecting rod II; 7 - positioning device; 71 - positioning column; 72 - driving gear; 73 - driving gear ring; 74 - driving shaft; 75 - pinion; 76 - sliding block; 77 - transmission gear; 8 - clamping device; 81 - L-shaped support column; 82 - compression bolt; 83 - compression block; 9 - drill bit; 91 - drill rod; 92 - first mounting plate; 93 - second mounting plate; 94 - hollow guide block I; 95 - guide groove I; 96 - guide groove II; 97 - hollow guide block II; 98 - power sleeve; 99 - connecting plate; 910 - belt mechanism; 911 - transmission sleeve. DETAILED DESCRIPTION

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example: like Figures 1 to 11 As shown, a drilling machine for machining includes a base 1, a column 2, a crossbeam 3, and a drilling frame 4. The base 1, column 2, crossbeam 3, and drilling frame 4 constitute the basic structure of the drilling machine. Specifically, the column 2 is fixedly mounted on the base 1, the crossbeam 3 is slidably mounted on the column 2, and the drilling frame 4 is fixedly mounted on the crossbeam 3. A height adjustment mechanism 5 for changing the height of the crossbeam 3 is provided between the crossbeam 3 and the column 2. The height adjustment mechanism 5 adopts existing technology, such as a lead screw rotatably mounted on the column 2, which is threadedly connected to the crossbeam 3, and the position of the crossbeam 3 is adjusted by rotating the lead screw.

[0023] To improve the applicability of the drilling machine, enabling it to drill holes in flanges with both vertical and inclined axes, this application employs a U-shaped drilling frame 4. A rotating disk 42 is rotatably connected to the drilling frame 4 via a shaft 41. A drilling rig is slidably mounted on the rotating disk 42, and the angle of the drilling rig can be adjusted by changing the angle of the rotating disk 42. Specifically, worm gear teeth are provided on the outer ring surface of the rotating disk 42, and a worm 412 is rotatably mounted on the drilling frame 4 to mesh with the worm gear teeth. The worm 412 drives the rotating disk 42 to rotate, and the self-locking mechanism of the worm gear positions the rotating disk 42.

[0024] The drilling rig includes a drilling rig base 43, a drill bit mounting base 44, and a drive rod 45. The drilling rig base 43 is slidably fitted with a rotary disk 42. The drill bit mounting base 44 is rotatably mounted on the drilling rig base 43. The drive rod 45 is rotatably mounted on the rotary disk 42. A drive device 6 is connected to the upper end of the drive rod 45, and the lower end of the drive rod 45 is inserted into the drill bit mounting base 44 and splinedly connected to the drill bit mounting base 44. A drill bit 9 is connected to the drill bit mounting base 44. The drill bit 9 can be of the following types: Figure 1 The diagram shows a standard twist drill. When the drive unit 6 drives the drive rod 45 to rotate, the drive rod 45 drives the drill bit mounting base 44 and the drill bit 9 mounted on it to rotate through a spline connection.

[0025] In order to ensure that the rotating disc 42 rotates, the driving device 6 transmits power to the driving rod 45 without interruption, in this embodiment, the driving device 6 includes a motor 61, a first belt driving structure 62, a second belt driving structure 63 and a transmission rod 64, the transmission rod 64 is rotatably arranged on the rotating disc 42, one end of the transmission rod 64 is fixedly connected with a first bevel gear 65, the driving rod 45 is fixedly connected with a second bevel gear meshing with the first bevel gear 65, when the transmission rod 64 rotates, the driving rod 45 is driven to rotate through the meshing of the bevel gears.

[0026] The motor 61 is fixedly arranged on one side of the cross beam 3 close to the column 2, so as to reduce the influence of the weight of the motor 61 on the cross beam 3. The motor shaft of the motor 61 is directly or indirectly connected with a driving shaft 66, the driving shaft 66 is rotatably connected with a connecting rod I 67, the transmission rod 64 is rotatably connected with a connecting rod II 68, the connecting rod I 67 and the connecting rod II 68 are hingedly connected through an intermediate shaft, and a rotating sleeve is rotatably sleeved on the intermediate shaft. The first belt driving structure 62 is arranged between the driving shaft 66 and the rotating sleeve, and the second belt driving structure 63 is arranged between the transmission rod 64 and the rotating sleeve. When the motor shaft of the motor 61 rotates, the rotating sleeve is driven to rotate through the first belt driving structure 62, and then the transmission rod 64 is driven to rotate through the second belt driving structure 63.

[0027] When the transmission rod 64 rotates with the rotating disc 42, the distance between the transmission rod 64 and the driving shaft 66 changes (they are always parallel), and the first belt driving structure 62 and the second belt driving structure 63 can adapt to the changing distance to prevent power interruption.

[0028] In order to control the feeding of the drill bit, the drill holder 43 is fixedly connected with a rack 47 through a connecting rod 46, and the side wall of the rotating disc 42 is provided with a sliding groove for sliding of the connecting rod 46 and the rack 47. A driving sleeve 48 is rotatably sleeved on the rotating shaft 41, and the driving sleeve 48 and the rotating shaft 41 have damping therebetween. The driving sleeve 48 penetrates through the side wall of the drilling frame 4, one end of the driving sleeve 48 is fixedly connected with a driving gear 49 meshing with the rack 47, and the other end of the driving sleeve 48 is connected with a hand wheel. The hand wheel is manually rotated, the driving gear 49 drives the rack 47 to slide along the sliding groove, and then drives the drill holder 43 and the drill bit to linearly feed.

[0029] Preferably, a gearbox can be arranged between the motor 61 and the driving shaft 66 to provide the required drilling speed through the gearbox.

[0030] The valve body flange plate usually has multiple holes, and the drill bit with a single drill rod can only drill one hole at a time, and the position of the valve body needs to be frequently adjusted. In order to solve this problem, in this embodiment, the drill bit 9 includes a drill rod 91 and first and second mounting plates 92 and 93, and the drill rod 91 is provided as four or six.

[0031] The first mounting plate 92 is fixedly connected with the drilling machine base 43, and can be connected by screwing. The first mounting plate 92 and the second mounting plate 93 are rotationally connected and provided with a locking mechanism. The locking mechanism can be a jacking screw. The jacking screw is screwed on the first mounting plate 92, and the lower end of the jacking screw can contact the second mounting plate 93. When the second mounting plate 93 is rotated to the appropriate position, the jacking screw is used to tighten the second mounting plate 93.

[0032] A plurality of guide grooves I 95 are uniformly arranged on the first mounting plate 92. A plurality of guide grooves II 96 are arranged on the second mounting plate 93 and matched with the guide grooves I 95. The guide grooves II 96 are crosswise arranged with the guide grooves I 95. A hollow guide block I 94 is slidingly arranged in each guide groove I 95. A hollow guide block II 97 is slidingly arranged in each guide groove II 96. A power sleeve 98 is rotationally connected in the hollow guide block I 94. The power sleeve 98 is rotationally connected with the corresponding hollow guide block II 97. When the second mounting plate 93 rotates relative to the first mounting plate 92, the guide grooves I 95 and the guide grooves II 96 cooperate to change the position of the power sleeve 98. In turn, the flange plate punching operation of different sizes is adapted. The power sleeve 98 is provided with an interface for mounting a drill rod. The interface structure adopts the existing drill rod mounting structure of the drill.

[0033] In order to simultaneously transmit power to a plurality of drill rods, two connecting plates 99 are hingedly connected between two adjacent power sleeves 98. The two connecting plates 99 are hingedly connected through a hinge shaft. A rotating sleeve is rotatably sleeved on the hinge shaft. The power sleeve 98 and the corresponding rotating sleeve are drivingly connected through a belt mechanism 910. When one of the power sleeves 98 rotates, power is transmitted to the rotating sleeve through the belt mechanism 910. When the rotating sleeve rotates, power is transmitted to the adjacent other power sleeve 98 through the other belt mechanism 910. When the position of the power sleeve 98 changes, the distance between the power sleeve 98 and the corresponding rotating sleeve remains unchanged. Therefore, the belt mechanism 910 can normally transmit power.

[0034] A transmission sleeve 911 is rotationally arranged in the middle of the first mounting plate 92 and circumferentially limited by the drill bit mounting seat 44. The transmission sleeve 911 is synchronously rotated by the drill bit mounting seat 44. The transmission sleeve 911 and one of the power sleeves 98 are drivingly connected through two sets of belt mechanisms 910. Specifically, the connection mode of the two sets of belt mechanisms 910 is the same as the connection mode between the adjacent power sleeves 98, and both include connecting plates, hinge shafts, and rotating sleeves. The two connecting plates are hingedly connected with the transmission sleeve 911 and the power sleeve 98, respectively. The two connecting plates are hingedly connected through a hinge shaft. The rotating sleeve is arranged on the hinge shaft. One of the belt mechanisms 910 is arranged between the rotating sleeve and the power sleeve 98. The other belt mechanism 910 is arranged between the rotating sleeve and the transmission sleeve 911.

[0035] In order to clamp and move the workpiece (valve body), the mounting plate 11 is slidably arranged at the upper end of the base 1, the positioning device 7 and the clamping device 8 are arranged on the mounting plate 11, and the linear driver 12 is arranged between the mounting plate 11 and the base 1.

[0036] The positioning device 7 adopts a self-centering mechanism, specifically including a positioning column 71, a driving gear 72 and a driving gear ring 73, the driving gear ring 73 is rotationally arranged on the mounting plate 11, a driving shaft 74 is rotationally arranged on the mounting plate 11, a small gear 75 is connected to the lower end of the driving shaft 74 and meshes with the driving gear ring 73, when the driving shaft rotates, the small gear 75 drives the driving gear ring 73 to rotate, in order to facilitate operation, a knob is connected to the upper end of the driving shaft 74.

[0037] The positioning column 71 is arranged in three circumferential arrays opposite the driving gear ring 73, three sliding grooves are formed in the mounting plate 11, the three sliding grooves are arranged in circumferential arrays opposite the driving gear ring 73, a sliding block 76 is slidably arranged in each of the three sliding grooves, and the three positioning columns 71 are arranged on the three sliding blocks 76 and move synchronously with the corresponding sliding blocks. The sliding block 76 is provided with a tooth on one side, and each sliding block is provided with a transmission gear 77 meshing with the tooth, and the transmission gear 77 meshes with the driving gear ring 73. When the driving gear ring 73 rotates, the three transmission gears 77 rotate synchronously, and the transmission gear 77 drives the corresponding sliding block 76 and the positioning column 71 to move synchronously, thereby positioning the inner hole of the valve.

[0038] The linear driver 12 can adopt a lead screw mechanism, when the mounting plate 11 moves to the minimum stroke position, the positioning axis of the positioning device 7 coincides with the axis of the drilling machine in the vertical state, in this state, the flange of the vertical axis of the valve body can be quickly drilled. The drilling frame 4 is provided with a limiting structure for positioning the vertical state of the drilling machine.

[0039] The clamping device 8 can adopt the prior art, for example, the clamping device 8 includes an L-shaped support column 81, a pressing bolt 82 and a pressing block 83, the L-shaped support column 81 is slidably arranged on the mounting plate 11, the pressing bolt 82 is threadedly connected to the L-shaped support column 81 and penetrates the L-shaped support column 81, and the pressing block 83 is rotationally arranged at the lower end of the pressing bolt 82. When the positioning device 7 is positioned, the pressing block 83 can be pressed by rotating the pressing bolt 82 to clamp the workpiece.

[0040] The above only describes the preferred embodiment of the present application in detail, but the present application is not limited to the above-mentioned embodiments, various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the present application, and various changes shall be included in the protection scope of the present application.

Claims

1. A drilling machine for machining, comprising a base (1), a column (2), a crossbeam (3) and a drilling frame (4), wherein the column (2) is fixedly mounted on the base (1), the crossbeam (3) is slidably mounted on the column (2), a height adjustment mechanism (5) is provided between the crossbeam (3) and the column (2), and the drilling frame (4) is fixedly mounted on the crossbeam (3); Its features are: The drilling frame (4) has a U-shaped structure. A rotating disk (42) is rotatably connected to the drilling frame (4) via a rotating shaft (41). A drilling machine is slidably mounted on the rotating disk (42). Worm gear teeth are provided on the outer ring surface of the rotating disk (42). A worm (412) that meshes with the worm gear teeth is rotatably mounted on the drilling frame (4). The drilling rig includes a drilling rig base (43), a drill bit mounting base (44), and a drive rod (45). The drill bit mounting base (44) is rotatably mounted on the drilling rig base (43), and the drive rod (45) is rotatably mounted on a rotary disk (42). The upper end of the drive rod (45) is connected to a drive device (6), and the lower end of the drive rod (45) is inserted into the drill bit mounting base (44) and splinedly connected to the drill bit mounting base (44). A drill bit (9) is connected to the drill bit mounting base (44). The drill base (43) is fixedly connected to a rack (47) via a connecting rod (46). The side wall of the rotating disk (42) is provided with a sliding groove for the connecting rod (46) and the rack (47) to slide. A drive sleeve (48) is rotatably sleeved on the rotating shaft (41). The drive sleeve (48) passes through the side wall of the drilling frame (4). One end of the drive sleeve (48) is fixedly connected to a drive gear (49) that meshes with the rack (47), and the other end of the drive sleeve (48) is connected to a handwheel.

2. The drilling machine for machining according to claim 1, characterized in that: The drive device (6) includes a motor (61), a first belt drive structure (62), a second belt drive structure (63), and a transmission rod (64). The transmission rod (64) is rotatably mounted on a rotating disk (42). One end of the transmission rod (64) is fixedly connected to a first bevel gear (65). A second bevel gear that meshes with the first bevel gear (65) is fixedly connected to the drive rod (45). The motor (61) is fixedly mounted on the side of the crossbeam (3) near the column (2). The motor shaft of the motor (61) is directly or indirectly connected to a drive shaft (66). A connecting rod I (67) is rotatably connected to the drive shaft (66). A connecting rod II (68) is rotatably connected to the transmission rod (64). The ends of the connecting rods I (67) and II (68) that are close to each other are hinged through an intermediate shaft. A rotating sleeve is rotatably sleeved on the intermediate shaft. The first belt drive structure (62) is disposed between the drive shaft (66) and the rotating sleeve, and the second belt drive structure (63) is disposed between the transmission rod (64) and the rotating sleeve.

3. A drilling machine for machining according to claim 1, characterized in that: A gearbox is provided between the motor (61) and the drive shaft (66).

4. A drilling machine for machining according to claim 1, characterized in that: The base (1) is slidably provided with an mounting plate (11) on its upper end. The mounting plate (11) is provided with a positioning device (7) and a clamping device (8). A linear driver (12) is provided between the mounting plate (11) and the base (1).

5. A drilling machine for machining according to claim 4, characterized in that: The positioning device (7) includes a positioning column (71), a drive gear (72) and a drive gear ring (73). The drive gear ring (73) is rotatably mounted on the mounting plate (11). A drive shaft (74) is rotatably mounted on the mounting plate (11). A small gear (75) meshing with the drive gear ring (73) is connected to the lower end of the drive shaft (74). A knob is connected to the upper end of the drive shaft (74). The positioning pins (71) are arranged in a circular array relative to the drive gear ring (73). The mounting plate (11) has three sliding grooves, and a slider (76) is slidably arranged in each of the three sliding grooves. The three positioning pins (71) are arranged on the three sliders (76). A tooth is provided on one side of the slider (76). Each slider is equipped with a transmission gear (77) that meshes with the tooth. The transmission gears (77) mesh with the drive gear ring (73).

6. A drilling machine for machining according to claim 5, characterized in that: The clamping device (8) includes an L-shaped support column (81), a clamping bolt (82), and a pressure block (83). The L-shaped support column (81) is slidably mounted on the mounting plate (11). The clamping bolt (82) is threaded onto the L-shaped support column (81) and passes through the L-shaped support column (81). The pressure block (83) is rotatably mounted at the lower end of the clamping bolt (82).

7. A drilling machine for machining according to claim 1, characterized in that: The drill bit (9) includes a drill rod (91), a first mounting plate (92), and a second mounting plate (93). The first mounting plate (92) and the second mounting plate (93) are rotatably connected and equipped with a locking mechanism. The first mounting plate (92) is evenly provided with a plurality of guide grooves I (95), and the second mounting plate (93) is provided with a plurality of guide grooves II (96) that cooperate with the guide grooves I (95). The guide grooves II (96) and the guide grooves I (95) are arranged intersectingly. Hollow guide block I (94) is slidably arranged in each guide groove I (95), and hollow guide block II (97) is slidably arranged in each guide groove II (96). A power sleeve (98) is rotatably connected in the hollow guide block I (94). The power sleeve (98) is rotatably connected to the corresponding hollow guide block II (97). The power sleeve (98) is provided with an interface for installing drill rods. Two connecting plates (99) are hinged between two adjacent power sleeves (98). The two connecting plates (99) are hinged through a hinge shaft. A rotating sleeve is rotatably sleeved on the hinge shaft. The power sleeve (98) and the corresponding rotating sleeve are connected by a belt mechanism (910). The first mounting plate (92) is connected to the drill base (43). The first mounting plate (92) is rotatably provided with a transmission sleeve (911) that is circumferentially limited to the drill bit mounting base (44). The transmission sleeve (911) is connected to one of the power sleeves (98) through two sets of belt mechanisms (910).

8. A drilling machine for machining according to claim 1, characterized in that: The drilling frame (4) is equipped with a limiting structure for positioning the drilling rig in a vertical state.

9. A drilling machine for machining according to claim 1, characterized in that: The height adjustment mechanism (5) includes a lead screw that is rotatably mounted on the column (2), and the lead screw is threadedly connected to the crossbeam (3).

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