Numerical control heavy horizontal plane milling machine

Abstract

The utility model provides a numerical control heavy horizontal plane milling machine which comprises a machine body, a stand column arranged on the machine body and a horizontal milling device arranged on the stand column in a sliding mode, the horizontal milling device comprises a lifting saddle, a spindle box and a box body driving mechanism, and an upper limiting sliding rail is arranged at the top of the side wall of the lifting saddle. An upper limiting sliding rail is arranged on the top face of the lifting saddle, an upper limiting sliding groove is formed in the upper limiting sliding rail, a side limiting sliding rail is arranged on the side portion of the top face of the lifting saddle, a side limiting sliding groove is formed in the side limiting sliding rail, an upper sliding block in sliding fit with the upper limiting sliding groove is arranged on the top face of the spindle box, and a side sliding block in sliding fit with the side limiting sliding groove is arranged on the side wall of the spindle box. The horizontal milling device in the numerical control heavy horizontal plane milling machine comprises the lifting saddle and the spindle box, guiding is achieved between the lifting saddle and the spindle box through a hydrostatic guide rail composed of an upper sliding block, an upper limiting sliding rail, a side sliding rail and a side limiting sliding rail, the spindle box can conduct transverse feeding, and the feeding range of the spindle box is large.

Description

Technical Field

[0001] The utility model relates to the technical field of milling machines, in particular to a numerically controlled heavy-duty horizontal plane milling machine. Background Art

[0002] CNC milling machines, also known as CNC milling machines, are controlled by digital signals. Compared with general milling machines, although the structure and processing technology of CNC milling machines are basically similar, they have a higher level of intelligence and automation, so they are more widely used in mechanical processing and manufacturing. CNC milling machines have excellent processing capabilities, and their adaptability and flexibility are significantly superior to ordinary milling machines. This feature is particularly evident in the processing and manufacturing of precision parts. For example, when processing three-dimensional curved surface parts, CNC milling machines can ensure processing accuracy at the source and avoid human operating errors to the greatest extent. There are many forms of CNC milling machines, and different types of CNC milling machines have different processing characteristics. However, no matter what type of CNC milling machine, it is usually composed of a workbench, a bed, a lifting table, a milling head, and a cross feed part.

[0003] The existing Chinese patent with publication number CN101670460 discloses a double-spindle box bed type milling machine, including a base, a column, and a horizontal milling processing device. The column is arranged at the rear of the base, and the horizontal milling processing device is arranged on the side of the column. The horizontal milling processing device includes a horizontal milling spindle box, a power motor is installed on the horizontal milling spindle box, and a horizontal milling spindle unit is installed in the horizontal milling spindle box. The horizontal milling spindle unit is connected to the power motor through a transmission member, and the horizontal milling spindle box is connected to the guide rail in the upper and lower directions through a pressure plate and a strip for relative sliding. A horizontal milling drive screw is designed at the rear of the horizontal milling spindle box, and the horizontal milling drive screw is connected to the horizontal milling spindle box through a nut. The lower end of the horizontal milling drive screw is connected to the intermediate shaft through a connecting sleeve, and the intermediate shaft is connected with an upper arc tooth through a key, and the upper arc tooth meshes with the lower arc tooth. The upper arc tooth and the lower arc tooth are connected for relative rotation, and the lower arc tooth is connected to the feed motor through an input shaft. The above-mentioned prior art solutions have the following defects: the horizontal milling spindle box of the double-spindle box bed type milling machine can only be fed up and down, and the feeding range of the horizontal milling spindle box is relatively small. Utility Model Content

[0004] The problem to be solved by the utility model is to provide a CNC heavy-duty horizontal plane milling machine in view of the above-mentioned deficiencies existing in the prior art, which solves the technical problem of small feeding range of the horizontal milling spindle box existing in the prior art.

[0005] The above-mentioned utility model purpose of the utility model is achieved through the following technical scheme: a CNC heavy-duty horizontal plane milling machine, including a bed, a column arranged on the bed, and a horizontal milling processing device slidably arranged on the column, the horizontal milling processing device including a lifting saddle, a spindle box, and a box driving mechanism, the top of the side wall of the lifting saddle is provided with an upper limit slide rail, the upper limit slide rail is provided with an upper limit slide groove, the side part of the top surface of the lifting saddle is provided with a side limit slide rail, the side limit slide rail is provided with a side limit slide groove, the top surface of the spindle box is provided with an upper slide block slidably matched with the upper limit slide groove, and the side wall of the spindle box is provided with a side slide block slidably matched with the side limit slide groove.

[0006] The utility model is further configured as follows: the lifting saddle has a saddle groove with a top opening, two connecting frames extending into the saddle grooves are arranged on the bottom surface of the spindle box, and connecting holes are opened on the connecting frames. The box driving mechanism includes a box driving motor arranged on the lifting saddle, a lead screw rotatably arranged in the saddle groove and connected to the output shaft of the box driving motor, and a nut arranged on the lead screw, and the nut is plugged into the connecting hole and screwed to the connecting frame.

[0007] The utility model is further configured as follows: a left bearing groove and a right bearing groove are respectively opened on the two end surfaces of the lifting saddle, a left ball bearing mounted on the end of the screw is embedded in the left bearing groove, a left end cover closing the left bearing groove is arranged on the end surface of the lifting saddle, a right ball bearing mounted on the end of the screw is embedded in the right bearing groove, and a right end cover closing the right bearing groove is arranged on the end surface of the lifting saddle.

[0008] The utility model is further configured as follows: a lower mounting groove with a top opening is provided in the spindle box, a front bearing groove and a middle bearing groove connected to the lower mounting groove are sequentially provided on the outer side wall of the spindle box, a rear bearing groove is provided on the groove wall of the lower mounting groove away from the middle bearing groove, a milling cutter spindle is rotatably arranged in the spindle box, the milling cutter spindle spans the front bearing groove, the middle bearing groove, the lower mounting groove, and the rear bearing groove and extends out of the spindle box, and a horizontal milling cutter is provided on the end of the milling cutter spindle extending out of the spindle box.

[0009] The utility model is further configured as follows: the front bearing groove is embedded with a bidirectional thrust angular contact ball bearing and a double-row tapered roller bearing which are mounted on the front part of the milling cutter spindle; the outer side wall of the spindle box is provided with a front end cover which is pressed and fixed in the front bearing groove by the bidirectional thrust angular contact ball bearing and the double-row tapered roller bearing; the middle bearing groove is embedded with a middle ball bearing and a single-row tapered roller bearing which are mounted in the middle part of the milling cutter spindle; the groove wall of the lower mounting groove is provided with a middle end cover which presses and fixes the middle ball bearing and the single-row tapered roller bearing in the middle bearing groove; the rear bearing groove is embedded with a rear ball bearing which is mounted on the rear part of the milling cutter spindle; the groove wall of the lower mounting groove is provided with a rear end cover which presses and fixes the rear ball bearing in the rear bearing groove.

[0010] The utility model is further configured as follows: a milling cutter gear is coaxially arranged on the milling cutter spindle, a gear box is arranged on the top surface of the spindle box, an upper mounting groove with a bottom opening is provided in the gear box, the upper mounting groove is connected with the lower mounting groove, a motor frame is arranged on the side wall of the gear box, a milling cutter drive motor is arranged on the end surface of the motor frame away from the gear box, and a transmission mechanism is arranged between the milling cutter drive motor and the milling cutter gear on the milling cutter spindle.

[0011] The utility model is further configured as follows: the transmission mechanism includes a primary transmission shaft, a secondary transmission shaft, a tertiary transmission shaft, and a fourth transmission shaft rotatably arranged in a gear box, one end of the primary transmission shaft extends out of the gear box and is coaxially connected to the milling cutter drive motor, a primary gear is coaxially arranged on the primary transmission shaft, a secondary large gear meshing with the primary gear is coaxially arranged on the secondary transmission shaft, a secondary small gear is coaxially arranged on the secondary transmission shaft, a third large gear meshing with the second small gear is coaxially arranged on the third transmission shaft, a third small gear is coaxially arranged on the third transmission shaft, a fourth large gear meshing with the third small gear is coaxially arranged on the fourth transmission shaft, and a fourth small gear meshing with the milling cutter gear is coaxially arranged on the fourth transmission shaft.

[0012] The utility model is further configured as follows: both end surfaces of the gear box are provided with primary bearing holes connected to the upper mounting groove, a primary ball bearing mounted on the end of the primary transmission shaft is arranged in the primary bearing hole, and a primary end cover for closing the primary bearing hole is arranged on the outer side wall of the gear box.

[0013] The utility model is further configured as follows: secondary bearing holes connected to the upper mounting groove are provided on both end surfaces of the gear box, a secondary ball bearing mounted on the end of the secondary transmission shaft is provided in the secondary bearing hole, and a secondary end cover for closing the secondary bearing hole is provided on the outer wall of the gear box.

[0014] The utility model is further configured as follows: three-stage bearing holes connected to the upper mounting groove are opened on both end surfaces of the gear box, three-stage ball bearings mounted on the ends of the three-stage transmission shafts are arranged in the three-stage bearing holes, and three-stage end covers closing the three-stage bearing holes are arranged on the outer side wall of the gear box.

[0015] To sum up, the beneficial technical effects of the utility model are as follows: the horizontal milling processing device in the CNC heavy-duty horizontal plane milling machine includes a lifting saddle and a spindle box, and the lifting saddle and the spindle box are guided by a hydrostatic guide rail composed of an upper slide block and an upper limit slide rail, a side slide rail and a side limit slide rail, and the spindle box can be fed laterally, and the feed range of the spindle box is large. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the horizontal milling processing device in the utility model;

[0017] Figure 2 It is a schematic diagram of the exploded structure of the lifting saddle and the spindle box in the utility model;

[0018] Figure 3 It is a partial cross-sectional structural diagram of the main shaft box in the utility model;

[0019] Figure 4 It is a structural schematic diagram of the spindle box in the utility model;

[0020] Figure 5 It is a structural schematic diagram of the transmission structure and the milling cutter spindle in the utility model;

[0021] Figure 6 This is a partial cross-sectional structural diagram of the lifting saddle in the utility model.

[0022] Figure 7 It is a structural schematic diagram of the main shaft box in the utility model.

[0023] In the above drawings: 1, bed; 2, column; 3, horizontal milling device; 4, lifting saddle; 5, upper limit slide rail; 6, upper limit slide groove; 7, side limit slide rail; 8, side limit slide groove; 9, spindle box; 10, upper slide block; 11, side slide block; 12, saddle groove; 13, connecting frame; 14, connecting hole; 15, lead screw; 16, left bearing groove; 17, right bearing groove; 18, left ball bearing; 19, left End cover; 20, right ball bearing; 21, right end cover; 22, nut; 23, box drive motor; 24, lower mounting slot; 25, front bearing slot; 26, middle bearing slot; 27, rear bearing slot; 28, milling cutter spindle; 29, horizontal milling cutter; 30, milling cutter gear; 31, bidirectional thrust angular contact ball bearing; 32, double-row tapered roller bearing; 33, front end cover; 34, middle ball bearing; 35, single-row tapered roller 3. Bearing; 36. Middle end cover; 37. Rear ball bearing; 38. Rear end cover; 39. Gearbox; 391. Front box; 392. Rear box; 40. Upper mounting slot; 41. Motor frame; 42. Milling cutter drive motor; 43. Primary transmission shaft; 44. Primary gear; 45. Primary bearing hole; 46. Primary ball bearing; 47. Primary end cover; 48. Secondary transmission shaft; 49. Secondary large gear; 50. Secondary small gear; 51. Secondary bearing hole; 52. Secondary ball bearing; 53. Secondary end cover; 54. Third-stage transmission shaft; 55. Third-stage large gear; 56. Third-stage small gear; 57. Third-stage bearing hole; 58. Third-stage ball bearing; 59. Third-stage end cover; 60. Fourth-stage transmission shaft; 61. Fourth-stage large gear; 62. Fourth-stage small gear; 63. Fourth-stage bearing hole; 64. Fourth-stage ball bearing; 65. Fourth-stage end cover. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and functions achieved by the present invention clearer and easier to understand, the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0025] like Figure 1 As shown, the utility model provides a CNC heavy-duty horizontal plane milling machine, which comprises a bed 1, a column 2 arranged on the bed 1, and a horizontal milling processing device 3 slidably arranged on the column 2.

[0026] like Figure 2 As shown, the horizontal milling device 3 includes a lifting saddle 4, a spindle box 9, and a box driving mechanism.

[0027] like Figure 2As shown, the lifting saddle 4 is slidably arranged on the column 2, and the lifting saddle 4 makes up and down reciprocating linear motion along the height direction of the column 2. The lifting saddle 4 is L-shaped, and the top screw of the side wall of the lifting saddle 4 is connected with an upper limit slide rail 5, and the upper limit slide rail 5 is provided with an upper limit slide groove 6. The side screw of the top surface of the lifting saddle 4 is connected with a side limit slide rail 7, and the side limit slide rail 7 is provided with a side limit slide groove 8.

[0028] like Figure 2 As shown, an upper slider 10 is arranged on the top surface of the spindle box 9, and the upper slider 10 is slidably matched with the upper limit slide groove 6. The upper slider 10 and the upper limit slide rail 5 form a hydrostatic guide rail, that is, the lubricating oil is input into the oil chamber between the upper slider 10 and the upper limit slide groove 6 through the throttle, and the lubricating oil will form a load-bearing oil film in the oil chamber, so that the upper slider 10 and the upper limit slide rail 5 are in a pure liquid friction state.

[0029] like Figure 2 As shown, a side slider 11 is provided on the side wall of the spindle box 9, and the side slider 11 is slidably matched with the side limit slide groove 8. The side slider 11 and the side limit slide rail 7 form a hydrostatic guide rail, that is, the lubricating oil is input into the oil chamber between the side slider 11 and the side limit slide groove 8 through the throttle, and the lubricating oil will form a load-bearing oil film in the oil chamber, so that the side slider 11 and the side limit slide rail 7 are in a pure liquid friction state.

[0030] The horizontal milling processing device 3 in this CNC heavy-duty horizontal plane milling machine includes a lifting saddle 4 and a spindle box 9. The lifting saddle 4 and the spindle box 9 are guided by a hydrostatic guide rail composed of an upper slider 10, an upper limit slide rail 5, a side slide rail and a side limit slide rail 7, and the spindle box 9 can be fed horizontally, and the feed range of the spindle box 9 is large.

[0031] The upper limit slide 5 and the side limit slide 7 of this CNC heavy-duty horizontal plane milling machine adopt a 90-degree pressure plate design, which does not rely on screws to support the weight of the slide itself, can bear higher processing accuracy and cutting rigidity, and at the same time adopts a multi-faceted contact guide structure to enhance the tensile strength and torsional resistance.

[0032] like Figure 6 and Figure 7 As shown, the lifting saddle 4 has a saddle groove 12 with an opening at the top, and two connecting frames 13 are screwed to the bottom surface of the spindle box 9. The two connecting frames 13 both extend into the saddle groove 12, and connecting holes 14 are opened on the connecting frames 13.

[0033] like Figure 6 and Figure 7As shown, the box driving mechanism includes a lead screw 15, a nut 22, and a box driving motor 23. The lead screw 15 is rotatably arranged in the saddle groove 12, and the two end surfaces of the lifting saddle 4 are respectively provided with a left bearing groove 16 and a right bearing groove 17, both of which are step grooves, and the left bearing groove 16 is embedded with two left ball bearings 18 fitted on the end of the lead screw 15, and the end surface of the lifting saddle 4 is screwed with a left end cover 19 that closes the left bearing groove 16, and the right bearing groove 17 is embedded with four right ball bearings 20 that fit on the end of the lead screw 15, and the end surface of the lifting saddle 4 is screwed with a right end cover 21 that closes the right bearing groove 17. There are two nuts 22, and the nuts 22 and the lead screw 15 form a ball screw 15 pair, and the nuts 22 are plug-fitted with the connecting hole 14, and the nuts 22 are screw-connected to the connecting frame 13. The box driving motor 23 is fixedly mounted on the lifting saddle 4, and the output shaft of the box driving motor 23 is connected to the lead screw 15 through a coupling.

[0034] When the CNC heavy-duty horizontal plane milling machine is working, the box driving motor 23 drives the lead screw 15 to rotate. Since the nut 22 and the lead screw 15 form a ball screw 15 pair, the lead screw 15 will move laterally by driving the nut 22, thereby driving the spindle box 9 to feed laterally.

[0035] like Figure 3 As shown, the spindle box 9 has a lower mounting groove 24, and the top of the lower mounting groove 24 is open. The outer wall of the spindle box 9 is provided with a front bearing groove 25 and a middle bearing groove 26 in sequence. The front bearing groove 25 and the middle bearing groove 26 are both step grooves. The middle bearing groove 26 is connected with the lower mounting groove 24, and a rear bearing groove 27 is provided on the groove wall of the lower mounting groove 24 away from the middle bearing groove 26. A milling cutter spindle 28 is rotatably arranged in the spindle box 9, and the milling cutter spindle 28 spans the front bearing groove 25, the middle bearing groove 26, the lower mounting groove 24, and the rear bearing groove 27 and extends out of the spindle box 9. A horizontal milling cutter 29 is arranged at the end of the milling cutter spindle 28 extending out of the spindle box 9, and a milling cutter gear 30 is coaxially installed on the milling cutter spindle 28 through a key connection, and the milling cutter gear 30 is located in the lower mounting groove 24.

[0036] like Figure 3As shown, a bidirectional thrust angular contact ball bearing 31 and a double-row tapered roller bearing 32 are embedded in the front bearing groove 25. The bidirectional thrust angular contact ball bearing 31 is characterized in that it can bear the combined load of radial and axial loads at the same time, limiting the axial displacement of the milling cutter spindle 28. The double-row tapered roller bearing 32 mainly bears the combined load of radial and axial loads. The bidirectional thrust angular contact ball bearing 31 and the double-row tapered roller bearing 32 are both mounted on the front part of the milling cutter spindle 28. The bidirectional thrust angular contact ball bearing 31 is located on the side of the double-row tapered roller bearing 32 close to the milling cutter gear 30. The outer wall of the spindle box 9 is screwed with a front end cover 33 that closes one side of the front bearing groove 25. The front end cover 33 presses and fixes the bidirectional thrust angular contact ball bearing 31 and the double-row tapered roller bearing 32 in the front bearing groove 25.

[0037] like Figure 3 As shown, a middle ball bearing 34 and a single-row tapered roller bearing 35 are embedded in the middle bearing groove 26. The rolling bearing is used to support the rotation of the milling cutter spindle 28. The single-row tapered roller bearing 35 mainly bears the combined radial and axial loads. The middle ball bearing 34 and the single-row tapered roller bearing 35 are both mounted in the middle of the milling cutter spindle 28. The single-row tapered roller bearing 35 is located on the side of the middle ball bearing 34 close to the milling cutter gear 30. A middle end cover 36 that closes one side of the middle bearing groove 26 is screwed to the groove wall of the lower mounting groove 24. The middle end cover 36 presses and fixes the middle ball bearing 34 and the single-row tapered roller bearing 35 in the middle bearing groove 26.

[0038] like Figure 3 As shown, two rear ball bearings 37 are embedded in the rear bearing groove 27. The rear ball bearings 37 are used to support the rotation of the milling cutter spindle 28. The two rear ball bearings 37 are both mounted on the rear part of the milling cutter spindle 28. A rear end cover 38 that closes the rear bearing groove 27 is screwed to the groove wall of the lower mounting groove 24. The rear end cover 38 presses and fixes the two rear ball bearings 37 in the rear bearing groove 27.

[0039] This CNC heavy-duty horizontal plane milling machine is provided with a bidirectional thrust angular contact ball bearing 31 and a double-row tapered roller bearing 32 at the front of the milling cutter spindle 28, a middle ball bearing 34 and a single-row tapered roller bearing 35 are provided in the middle of the milling cutter spindle 28, and a rear ball bearing 37 is provided at the rear of the milling cutter spindle 28. A three-section bearing support structure is adopted, so that the milling cutter spindle 28 can rotate stably.

[0040] like Figure 3 and Figure 4As shown, a gear box 39 is arranged on the top surface of the spindle box 9, and the gear box 39 is located just above the lower mounting groove 24. The gear box 39 has an upper mounting groove 40 with a bottom opening, and the upper mounting groove 40 is connected with the lower mounting groove 24. The gear box 39 includes a front box body 391, a rear box body 392 bolted to the rear side of the front box body 391, a motor frame 41 is fixedly mounted on the side wall of the rear box body 392 away from the front box body 391, and a milling cutter drive motor 42 is fixedly mounted on the end surface of the motor frame 41 away from the gear box 39, and a transmission mechanism is arranged between the milling cutter drive motor 42 and the milling cutter gear 30 on the milling cutter spindle 28.

[0041] like Figure 5 As shown, the transmission mechanism includes a primary transmission shaft 43 , a secondary transmission shaft 48 , a tertiary transmission shaft 54 ​​, and a quaternary transmission shaft 60 .

[0042] like Figure 4 and Figure 5 As shown, the primary transmission shaft 43 is rotatably arranged in the upper mounting groove 40, and a primary gear 44 is coaxially arranged on the primary transmission shaft 43 through a key connection. Both end surfaces of the gear box 39 are provided with primary bearing holes 45 connected to the upper mounting groove 40, and the end of the primary transmission shaft 43 passes through the primary bearing hole 45 and is coaxially connected to the output shaft of the milling cutter drive motor 42 through a coupling. Two primary ball bearings 46 are arranged in each primary bearing hole 45 and are sleeved on the end of the primary transmission shaft 43. A primary end cover 47 that closes the primary bearing hole 45 is screwed to the outer wall of the gear box 39.

[0043] like Figure 4 and Figure 5 As shown, the secondary transmission shaft 48 is rotatably arranged in the upper mounting groove 40, the secondary transmission shaft 48 is located below the primary transmission shaft 43, and a secondary large gear 49 meshing with the primary gear 44 is coaxially arranged on the secondary transmission shaft 48 through a key connection, and a secondary small gear 50 is coaxially arranged on the secondary transmission shaft 48 through a key connection. Both end surfaces of the gear box 39 are provided with secondary bearing holes 51 connected to the upper mounting groove 40, and each secondary bearing hole 51 is provided with two secondary ball bearings 52 sleeved on the end of the secondary transmission shaft 48, and a secondary end cover 53 that closes the secondary bearing hole 51 is screwed to the outer wall of the gear box 39.

[0044] like Figure 4 and Figure 5As shown, the three-stage transmission shaft 54 ​​is rotatably arranged in the upper mounting groove 40, and the three-stage transmission shaft 54 ​​is located on the side of the two-stage transmission shaft 48. The three-stage transmission shaft 54 ​​is coaxially provided with a three-stage large gear 55 meshing with the two-stage small gear 50 through a key connection, and the three-stage transmission shaft 54 ​​is coaxially provided with a three-stage small gear 56 through a key connection. The two end surfaces of the gear box 39 are provided with three-stage bearing holes 57 connected with the upper mounting groove 40, and each of the three-stage bearing holes 57 is provided with two three-stage ball bearings 58 sleeved on the end of the three-stage transmission shaft 54, and the outer wall of the gear box 39 is screwed with a three-stage end cover 59 that closes the three-stage bearing hole 57.

[0045] like Figure 4 and Figure 5 As shown, the four-stage transmission shaft 60 is rotatably arranged in the upper mounting groove 40, and the four-stage transmission shaft 60 is located in the middle and lower part of the secondary transmission shaft 48 and the tertiary transmission shaft 54. The four-stage transmission shaft 60 is coaxially provided with a four-stage large gear 61 meshing with the three-stage small gear 56 through a key connection, and the four-stage transmission shaft 60 is coaxially provided with a four-stage small gear 62 meshing with the milling cutter gear 30 through a key connection. Four-stage bearing holes 63 communicating with the upper mounting groove 40 are provided on both end surfaces of the gear box 39, and two four-stage ball bearings 64 sleeved on the end of the four-stage transmission shaft 60 are provided in each four-stage bearing hole 63, and a four-stage end cover 65 is screwed on the outer wall of the gear box 39 to close the four-stage bearing hole 63.

[0046] The CNC heavy-duty horizontal plane milling machine is provided with a transmission mechanism between the milling cutter spindle 28 and the milling cutter drive motor 42. The transmission mechanism can increase the torque while reducing the output speed, thereby improving the load capacity.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A CNC heavy-duty horizontal plane milling machine, characterized in that: The invention comprises a bed (1), a column (2) arranged on the bed (1), and a horizontal milling processing device (3) slidably arranged on the column (2); the horizontal milling processing device (3) comprises a lifting saddle (4), a spindle box (9), and a box driving mechanism; an upper limit slide rail (5) is arranged on the top of the side wall of the lifting saddle (4); an upper limit slide groove (6) is provided on the upper limit slide rail (5); a side limit slide rail (7) is arranged on the side of the top surface of the lifting saddle (4); a side limit slide groove (8) is provided on the side limit slide rail (7); an upper slide block (10) slidably matched with the upper limit slide groove (6) is arranged on the top surface of the spindle box (9); and a side slide block (11) slidably matched with the side limit slide groove (8) is arranged on the side wall of the spindle box (9).

2. A CNC heavy-duty horizontal plane milling machine according to claim 1, characterized in that: The lifting saddle (4) has a saddle groove (12) with a top opening, and two connecting frames (13) extending into the saddle groove (12) are arranged on the bottom surface of the spindle box (9), and the connecting frames (13) are provided with connecting holes (14). The box driving mechanism includes a box driving motor (23) arranged on the lifting saddle (4), a lead screw (15) rotatably arranged in the saddle groove (12) and connected to the output shaft of the box driving motor (23), and a nut (22) arranged on the lead screw (15), and the nut (22) is plugged into the connecting hole (14) and screwed to the connecting frame (13).

3. A CNC heavy-duty horizontal plane milling machine according to claim 2, characterized in that: The two end surfaces of the lifting saddle (4) are respectively provided with a left bearing groove (16) and a right bearing groove (17); the left bearing groove (16) is embedded with a left ball bearing (18) which is fitted on the end of the lead screw (15); the end surface of the lifting saddle (4) is provided with a left end cover (19) which closes the left bearing groove (16); the right bearing groove (17) is embedded with a right ball bearing (20) which is fitted on the end of the lead screw (15); and the end surface of the lifting saddle (4) is provided with a right end cover (21) which closes the right bearing groove (17).

4. The CNC heavy-duty horizontal plane milling machine according to claim 1, characterized in that: The spindle box (9) has a lower mounting groove (24) with a top opening, and the outer side wall of the spindle box (9) is provided with a front bearing groove (25) and a middle bearing groove (26) connected to the lower mounting groove (24) in sequence, and the groove wall of the lower mounting groove (24) away from the middle bearing groove (26) is provided with a rear bearing groove (27), and a milling cutter spindle (28) is rotatably arranged in the spindle box (9), and the milling cutter spindle (28) spans the front bearing groove (25), the middle bearing groove (26), the lower mounting groove (24), and the rear bearing groove (27) and extends out of the spindle box (9), and a horizontal milling cutter (29) is arranged at the end of the milling cutter spindle (28) extending out of the spindle box (9).

5. The CNC heavy-duty horizontal plane milling machine according to claim 4, characterized in that: The front bearing groove (25) is embedded with a bidirectional thrust angular contact ball bearing (31) and a double-row tapered roller bearing (32) which are mounted on the front part of the milling cutter spindle (28); the outer wall of the spindle box (9) is provided with a front end cover (33) which is pressed and fixed in the front bearing groove (25); the middle bearing groove (26) is embedded with a middle ball bearing (34) and a single-row tapered roller bearing (32) which are mounted on the middle part of the milling cutter spindle (28); A tapered roller bearing (35), a middle end cover (36) for pressing and fixing the middle ball bearing (34) and the single-row tapered roller bearing (35) in the middle bearing groove (26) is arranged on the groove wall of the lower mounting groove (24), a rear ball bearing (37) sleeved on the rear part of the milling cutter spindle (28) is embedded in the rear bearing groove (27), and a rear end cover (38) for pressing and fixing the rear ball bearing (37) in the rear bearing groove (27) is arranged on the groove wall of the lower mounting groove (24).

6. The CNC heavy-duty horizontal plane milling machine according to claim 5, characterized in that: A milling cutter gear (30) is coaxially arranged on the milling cutter spindle (28), a gear box (39) is arranged on the top surface of the spindle box (9), an upper mounting groove (40) with a bottom opening is provided in the gear box (39), the upper mounting groove (40) is communicated with the lower mounting groove (24), a motor frame (41) is arranged on the side wall of the gear box (39), a milling cutter drive motor (42) is arranged on the end surface of the motor frame (41) away from the gear box (39), and a transmission mechanism is arranged between the milling cutter drive motor (42) and the milling cutter gear (30) on the milling cutter spindle (28).

7. The CNC heavy-duty horizontal plane milling machine according to claim 6, characterized in that: The transmission mechanism comprises a primary transmission shaft (43), a secondary transmission shaft (48), a tertiary transmission shaft (54), and a quaternary transmission shaft (60) rotatably arranged in a gear box (39), one end of the primary transmission shaft (43) extends out of the gear box (39) and is coaxially connected to a milling cutter drive motor (42), a primary gear (44) is coaxially arranged on the primary transmission shaft (43), and a secondary large gear (49) meshing with the primary gear (44) is coaxially arranged on the secondary transmission shaft (48), A secondary pinion (50) is coaxially arranged on the secondary transmission shaft (48), a third-stage large gear (55) meshing with the secondary pinion (50) is coaxially arranged on the third-stage transmission shaft (54), a third-stage small gear (56) is coaxially arranged on the third-stage transmission shaft (54), a fourth-stage large gear (61) meshing with the third-stage small gear (56) is coaxially arranged on the fourth-stage transmission shaft (60), and a fourth-stage pinion (62) meshing with the milling cutter gear (30) is coaxially arranged on the fourth-stage transmission shaft (60).

8. The CNC heavy-duty horizontal plane milling machine according to claim 7, characterized in that: Both end surfaces of the gear box (39) are provided with primary bearing holes (45) connected to the upper mounting groove (40), a primary ball bearing (46) mounted on the end of the primary transmission shaft (43) is arranged in the primary bearing hole (45), and a primary end cover (47) for closing the primary bearing hole (45) is arranged on the outer side wall of the gear box (39).

9. The CNC heavy-duty horizontal plane milling machine according to claim 7, characterized in that: The two end surfaces of the gear box (39) are provided with secondary bearing holes (51) connected to the upper mounting groove (40), and a secondary ball bearing (52) mounted on the end of the secondary transmission shaft (48) is arranged in the secondary bearing hole (51), and a secondary end cover (53) for closing the secondary bearing hole (51) is arranged on the outer side wall of the gear box (39).

10. The CNC heavy-duty horizontal plane milling machine according to claim 7, characterized in that: The gear box (39) is provided with a tertiary bearing hole (57) on both end surfaces thereof and connected to the upper mounting groove (40). A tertiary ball bearing (58) mounted on the end of the tertiary transmission shaft (54) is arranged in the tertiary bearing hole (57). A tertiary end cover (59) is arranged on the outer side wall of the gear box (39) to close the tertiary bearing hole (57).

Images