Ram rotating mechanism of numerical control machine tool

Abstract

The utility model provides a ram rotating mechanism of a numerical control machine tool, which comprises a sliding table and a ram body, and further comprises a servo motor and a ball screw, the servo motor is hinged on the sliding table, the servo motor is connected with the ball screw through a speed reducer, the ball screw is sleeved with a nut, and the nut is connected with the servo motor through a speed reducer. A rotating block is hinged to the back face of the ram body, the nut is fixed to the rotating block, the ram body and the sliding table are hinged through a rotating shaft, the servo motor drives the ball screw to rotate in the axial direction, and the nut moves up and down along the ball screw. And meanwhile, the nut drives the ram body to rotate relative to the sliding table. Compared with the prior art, the servo motor in the ram rotating mechanism of the numerical control machine tool drives the ball screw to axially rotate, the nut moves up and down along the ball screw, and meanwhile, the nut drives the ram body to rotate around the rotating shaft relative to the sliding table, so that inclined hole machining is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of numerical control machine tool equipment and relates to a ram rotating mechanism of a numerical control machine tool. Background Art

[0002] Traditional drilling machines cannot directly process inclined holes. Even if they need to process inclined holes, they rely on complex tooling and fixtures to assist in completion, which brings inconvenience to the processing and wastes a lot of clamping time. In view of this situation, a drilling machine has appeared on the market, such as the deep hole drilling machine with a rotatable ram described in Chinese Patent No.: "200620064769.0". The specific structure of the drilling machine is as follows: it includes a bed, a workbench, a crossbeam, a column, a ram, a spindle box, a spindle and a guide seat, and is characterized in that it also has a slide, a center shaft, a ram rotation drive device and a ram locking mechanism. The slide is placed on the column through the cooperation of its nut with the screw rod of the column and its guide groove with the guide rail of the column. The center shaft is placed at the center of the slide. The ram is sleeved on the center shaft with its center hole and is connected to the slide through a section of arc-shaped dovetail guide rail thereon and the arc-shaped dovetail guide groove of the slide. The ram rotation drive device and the ram locking mechanism are placed between the slide and the ram; the ram rotation drive device is composed of a servo motor, a worm and a worm wheel. The servo motor is placed on the slide, its rotating shaft is connected to the worm, and the worm wheel meshing with the worm is placed on the ram. In the above structure, the servo motor drives the worm to rotate, driving the worm wheel and the slide connected to it to rotate, thereby realizing the inclined hole processing. However, there is a large clearance error in the meshing cooperation between the worm wheel and the worm, especially the reverse clearance error. There is still a large error in the inclination angle of the slide. The processing accuracy of the drilling machine is low and cannot meet the requirements of the drilling machine for high-precision inclined hole processing. Summary of the invention

[0003] The purpose of the utility model is to provide a ram rotating mechanism for a numerically controlled machine tool in view of the above problems existing in the prior art.

[0004] The purpose of the utility model can be achieved through the following technical solutions: a ram rotation mechanism of a CNC machine tool, comprising a slide and a ram body, and also comprising a servo motor and a ball screw, wherein the servo motor is hinged on the slide, the servo motor is connected to the ball screw through a reducer, a nut is sleeved on the ball screw, a rotating block is hinged on the back of the ram body, the nut is fixed on the rotating block, the ram body and the slide are hinged by a rotating shaft, the servo motor drives the ball screw to rotate axially, the nut moves up and down along the ball screw, and at the same time the nut drives the ram body to rotate relative to the slide.

[0005] In the above-mentioned slide rotation mechanism of the CNC machine tool, a connecting block is fixed to the upper end of the slide, a mounting hole is formed in the connecting block, a mounting block is hinged in the mounting hole, the reducer is mounted on the top of the mounting block, the servo motor is located on the top of the reducer, a mounting groove is formed in the mounting block, and the end of the ball screw passes through the wall of the mounting groove and is connected to the reducer.

[0006] In the above-mentioned slide rotation mechanism of the CNC machine tool, hinge shafts are fixed on both side surfaces of the mounting block, a plurality of first bearings are sleeved on the hinge shaft, a first positioning step is formed on the hinge shaft, a positioning block is fixed on the end of the hinge shaft, the edge of the end face of the positioning block is exposed from the side face of the hinge shaft and forms a first positioning face, a mounting ring is penetrated and installed on the hole wall of the mounting hole, an end cover is installed on the mounting ring, the end of the mounting ring away from the end cover extends inward to form a second positioning face, a mounting cavity is formed between the end cover and the inner circumference of the mounting ring, the positioning block and the first bearing are both located in the mounting cavity, the first positioning face and the second positioning face are respectively located on both sides of the first bearing and are tightly attached to the first bearing, and the outer circumference of the first bearing is in contact with the inner circumference of the mounting ring.

[0007] In the above-mentioned ram rotating mechanism of the CNC machine tool, a rotating shaft is provided on the side of the rotating block, an insert ring is sleeved on the rotating shaft, a rotating groove is formed on the back of the ram body, the rotating shaft and the insert ring are both inserted into the rotating groove, the end face of the insert ring is fixed on the ram body, a plurality of second bearings and a plurality of positioning rings are provided between the insert ring and the rotating shaft, a second positioning step is formed on the rotating shaft, a third positioning step is formed on the inner circumference of the insert ring, the side face of the second bearing at the end is in contact with the second positioning step and the third positioning step, the positioning ring is in contact with the second bearing, a fixing ring is installed at the end of the rotating shaft, and the fixing ring is in contact with the positioning ring.

[0008] In the above-mentioned slide rotation mechanism of the CNC machine tool, it also includes a bed, a column moving motor is installed on the bed, a column is slidably arranged on the bed, the output shaft of the column moving motor drives the column to move horizontally, a slide moving motor is installed on the top of the column, the slide is slidably arranged on the column, and the output shaft of the slide moving motor drives the slide to move up and down.

[0009] Compared with the prior art, the servo motor in the ram rotating mechanism of the CNC machine tool drives the ball screw to rotate axially, and the nut moves up and down along the ball screw, and at the same time the nut drives the ram body to rotate relative to the slide table around the rotating axis to realize the processing of the inclined hole; there is no transmission gap and reverse transmission gap between the ball screw and the nut, the transmission error is extremely small, the control accuracy of the ram body rotation is high, the machine tool can perform high-precision inclined hole processing, the structure is simple, the control accuracy of the ram is high, and the machine tool can perform high-precision inclined hole processing; the mounting block and the connecting block are hingedly connected by the cooperation of the hinge shaft, the first bearing, the positioning block, and the mounting ring to ensure that the rotation process is stable and smooth without jamming, and the end cover protects the installation of the first bearing to prevent external dust from contaminating the first bearing and affecting the sliding guide effect of the first bearing; the rotating block and the ram body are hingedly connected by the rotating shaft, the insert ring, the second bearing, the positioning ring, and the fixing ring to ensure that the rotation process is stable and smooth without jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a three-dimensional structural schematic diagram of the slide rotating mechanism of the CNC machine tool.

[0011] Figure 2 It is a three-dimensional structural schematic diagram of the slide rotating mechanism of the CNC machine tool from another angle.

[0012] Figure 3 The invention discloses a cross-sectional structural diagram of the cooperation between the mounting block and the connecting block in the ram rotating mechanism of the numerical control machine tool.

[0013] Figure 4 The invention is a schematic diagram of the cross-sectional structure of the cooperation between the rotating block and the ram body in the ram rotating mechanism of the numerical control machine tool.

[0014] In the figure, 1. bed; 11. slide moving motor; 2. column; 3. slide; 31. connecting block; 32. mounting hole; 33. mounting block; 34. hinge shaft; 35. first bearing; 36. first positioning step; 37. positioning block; 38. mounting ring; 39. end cover; 4. slide body; 41. rotating groove; 5. servo motor; 6. ball screw; 7. reducer; 8. nut; 9. rotating block; 91. rotating shaft; 92. second bearing; 93. positioning ring; 94. second positioning step; 95. fixing ring; 96. insertion ring; 10. rotating shaft. DETAILED DESCRIPTION

[0015] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0016] like Figure 1-4As shown, the ram rotating mechanism of the present CNC machine tool comprises a bed 1, on which a column moving motor is installed, on which a column 2 is slidably arranged, and the output shaft of the column moving motor drives the column 2 to move horizontally through a ball screw. A slide moving motor 11 is installed on the top of the column 2, on which a slide 3 is slidably arranged, and the output shaft of the slide moving motor 11 drives the slide 3 to move up and down through a ball screw. A ram body 4 is arranged on the slide 3, and the ram body 4 and the slide 3 are hinged through a rotating shaft 10.

[0017] The above technical solution also includes a servo motor 5 and a ball screw 6. The servo motor 5 is hinged on the slide 3. The servo motor 5 is connected to the ball screw 6 through a reducer 7. A nut 8 is sleeved on the ball screw 6. A rotating block 9 is hinged on the back of the ram body 4. The nut 8 is fixed on the rotating block 9. The servo motor 5 drives the ball screw 6 to rotate axially, and the nut 8 moves up and down along the ball screw 6. At the same time, the nut 8 drives the ram body 4 to rotate around the rotating axis 10 relative to the slide 3. The articulated servo motor 5 and the rotating block 9 make the ball screw 6 also driven to rotate during the process of the ball screw 6 driving the ram body 4 to rotate.

[0018] In the above technical solution: a connecting block 31 is fixed to the upper end of the slide 3, a mounting hole 32 is formed in the connecting block 31, and a mounting block 33 is hinged in the mounting hole 32. The reducer 7 is mounted on the top of the mounting block 33, the servo motor 5 is located on the top of the reducer 7, a mounting groove is formed in the mounting block 33, the end of the ball screw 6 passes through the wall of the mounting groove and is connected to the reducer 7, and the mounting groove facilitates the connection operation between the ball screw 6 and the reducer 7.

[0019] In the above technical solution: the hinge shaft 34 is fixed on both sides of the mounting block 33, and a plurality of first bearings 35 are sleeved on the hinge shaft 34. A first positioning step 36 is formed on the hinge shaft 34, and a positioning block 37 is fixed at the end of the hinge shaft 34. The edge of the end face of the positioning block 37 is exposed from the side of the hinge shaft 34 and forms a first positioning surface. The side of the first bearing 35 contacts the first positioning step 36 or the first positioning surface. The first positioning step 36 and the first positioning surface position the installation of the first bearing 35 to prevent the first bearing 35 from axially moving on the hinge shaft 34. A mounting ring 38 is installed on the hole wall of the mounting hole 32, and an end cover 39 is installed on the mounting ring 38. The end of the mounting ring 38 away from the end cover 39 extends inward to form a second positioning surface. A mounting cavity is formed between the inner circumference of the end cover 39 and the mounting ring 38. The positioning block 37 and the first bearing 35 are both located in the mounting cavity. The first positioning surface and the second positioning surface are respectively located on both sides of the first bearing 35 and are in close contact with the first bearing 35. The outer circumference of the first bearing 35 contacts the inner circumference of the mounting ring 38. The end cover 39 protects the installation of the first bearing 35 to prevent external dust from contaminating the first bearing 35 and affecting the sliding effect of the first bearing 35. During installation, first put the mounting block 33 into the mounting hole 32, then fix the hinge shaft 34 on the mounting block 33, and fix the mounting ring 38 on the connecting block 31. At this time, the hinge shaft 34 has been inserted into the mounting ring 38, and the first bearing 35 and the positioning block 37 are installed on the hinge shaft 34. The first positioning surface and the second positioning surface are located on both sides of the first bearing 35 and are tightly attached to the first bearing 35. The positioning block 37 realizes the connection and fixation between the bearing 35, the hinge shaft 34 and the mounting ring 38, and finally the end cover 39 is installed.

[0020] In the above technical solution: Figure 4 As shown, Figure 4 The ram body 4 is hidden in the middle, a rotating shaft 91 is provided on the side of the rotating block 9, an insert ring 96 is sleeved on the rotating shaft 91, a rotating groove 41 is formed on the back of the ram body 4, the rotating shaft 91 and the insert ring 96 are both inserted into the rotating groove 41, and the end face of the insert ring 96 is fixed on the ram body 4. A plurality of second bearings 92 and a plurality of positioning rings 93 are provided between the insert ring 96 and the rotating shaft 91. A second positioning step 94 is formed on the rotating shaft 91, and a third positioning step 97 is formed on the inner circumference of the insert ring 96. The side of the second bearing 92 at the end is in contact with the second positioning step 94 and the third positioning step 97, and the positioning ring 93 is in contact with the second bearing 92. A fixing ring 95 is installed at the end of the rotating shaft 91, and the fixing ring 95 is in contact with the positioning ring 93. The fixing ring 95, the positioning ring 93, the second positioning step 94 and the third positioning step 97 position and install the second bearing 92 to prevent the second bearing 92 from being separated from the rotating shaft 91; at the same time, the second bearing 92 contacts the third positioning step 97 to prevent the rotating shaft 91 from moving laterally relative to the insertion ring 96, thereby completing the hinge connection of the rotating shaft 91 on the slide body 4 and sliding smoothly.

[0021] In the above technical solution, the angular range of rotation of the ram body 4 around the rotation axis 10 is -20° to +30° (with the ram body 4 being horizontally set to 0°, downward rotation is -, and upward rotation is +).

[0022] In the above technical scheme: the ram body 4 and the slide 3 are also provided with a positioning mechanism for positioning the rotation of the ram body 4. The structure of the positioning mechanism is the same as the structure in the application number "202321176756.2" and the name "A rotation positioning mechanism for a CNC machine tool", which realizes locking, braking and positioning of the ram body 4 after it rotates to the set angle.

[0023] In the ram rotation mechanism of the present CNC machine tool, the servo motor 5 drives the ball screw 6 to rotate axially, and the nut 8 moves up and down along the ball screw 6. At the same time, the nut 8 drives the ram body 4 to rotate relative to the slide table 3 around the rotation axis 10 to achieve the processing of the inclined hole; there is no transmission gap and reverse transmission gap between the ball screw 6 and the nut 8, the transmission error is extremely small, the rotation control accuracy of the ram body 4 is high, the machine tool can perform high-precision inclined hole processing, the structure is simple, the control accuracy of the ram is high, and the machine tool can perform high-precision inclined hole processing; the mounting block 33 The hinged connection between the rotating block 9 and the ram body 4 is achieved through the cooperation of the hinge shaft 34, the first bearing 35, the positioning block 37, and the mounting ring 38, ensuring that the rotation process is stable and smooth without jamming. The end cover 39 protects the installation of the first bearing 35 to prevent external dust from contaminating the first bearing 35 and affecting the sliding effect of the first bearing 35; the hinged connection between the rotating block 9 and the ram body 4 is achieved through the rotating shaft 91, the insert ring 96, the second bearing 92, the positioning ring 93, and the fixing ring 95, ensuring that the rotation process is stable and smooth without jamming.

[0024] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0025] Although the present invention uses the terms such as bed 1; slide moving motor 11; column 2; slide 3; connecting block 31; mounting hole 32; mounting block 33; hinge shaft 34; first bearing 35; first positioning step 36; positioning block 37; mounting ring 38; end cover 39; ram body 4; rotating groove 41; servo motor 5; ball screw 6; reducer 7; nut 8; rotating block 9; rotating shaft 91; second bearing 92; positioning ring 93; second positioning step 94; fixing ring 95; inserting ring 96; rotating shaft 10, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

[0026] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. The specific embodiments described in this article are only used to illustrate the spirit of the utility model. The technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar way, but they will not deviate from the spirit of the utility model or exceed the scope defined by the attached claims.

Claims

1. A ram rotating mechanism for a CNC machine tool, comprising a slide table (3) and a ram body (4), characterized in that It also includes a servo motor (5) and a ball screw (6), wherein the servo motor (5) is hinged on the slide (3), the servo motor (5) is connected to the ball screw (6) via a reducer (7), a nut (8) is sleeved on the ball screw (6), a rotating block (9) is hinged on the back of the ram body (4), the nut (8) is fixed on the rotating block (9), the ram body (4) and the slide (3) are hinged via a rotating shaft (10), the servo motor (5) drives the ball screw (6) to rotate axially, the nut (8) moves up and down along the ball screw (6), and at the same time the nut (8) drives the ram body (4) to rotate relative to the slide (3).

2. The ram rotating mechanism of a CNC machine tool according to claim 1, characterized in that A connecting block (31) is fixed at the upper end of the slide (3), a mounting hole (32) is formed in the connecting block (31), a mounting block (33) is hinged in the mounting hole (32), the reducer (7) is mounted on the top of the mounting block (33), the servo motor (5) is located on the top of the reducer (7), a mounting groove is formed in the mounting block (33), and the end of the ball screw (6) passes through the wall of the mounting groove and is connected to the reducer (7); The two side surfaces of the mounting block (33) are fixed with hinge shafts (34), the hinge shaft (34) is sleeved with a plurality of first bearings (35), the hinge shaft (34) is formed with a first positioning step (36), a positioning block (37) is fixed at the end of the hinge shaft (34), the edge of the end surface of the positioning block (37) is exposed from the side surface of the hinge shaft (34) and forms a first positioning surface, a mounting ring (38) is installed on the hole wall of the mounting hole (32), and an end cover is installed on the mounting ring (38) (39), the end of the mounting ring (38) away from the end cover (39) extends inward to form a second positioning surface, a mounting cavity is formed between the inner circumference of the end cover (39) and the mounting ring (38), the positioning block (37) and the first bearing (35) are both located in the mounting cavity, the first positioning surface and the second positioning surface are respectively located on both sides of the first bearing (35) and are tightly attached to the first bearing (35), and the outer circumference of the first bearing (35) is in contact with the inner circumference of the mounting ring (38).

3. The ram rotating mechanism of a CNC machine tool according to claim 1, characterized in that A rotating shaft (91) is provided on the side of the rotating block (9), an insert ring (96) is sleeved on the rotating shaft (91), a rotating groove (41) is formed on the back of the ram body (4), the rotating shaft (91) and the insert ring (96) are both inserted into the rotating groove (41), the end surface of the insert ring (96) is fixed on the ram body (4), and a plurality of second bearings (92) and a plurality of positioning rings (93) are provided between the insert ring (96) and the rotating shaft (91). The rotating shaft (91) is provided with a second positioning step (94), the inner circumferential surface of the insert ring (96) is provided with a third positioning step (97), the side surface of the second bearing (92) at the end is in contact with the second positioning step (94) and the third positioning step (97), the positioning ring (93) is in contact with the second bearing (92), and a fixing ring (95) is installed at the end of the rotating shaft (91), and the fixing ring (95) is in contact with the fixing ring (93).

4. The ram rotating mechanism of a CNC machine tool according to claim 1, characterized in that The machine also comprises a bed (1), a column moving motor is installed on the bed (1), a column (2) is slidably arranged on the bed (1), the output shaft of the column moving motor drives the column (2) to move laterally, a slide moving motor (11) is installed on the top of the column (2), the slide (3) is slidably arranged on the column (2), and the output shaft of the slide moving motor (11) drives the slide (3) to move up and down.

Images