Servo feed mechanism for annular parts

Abstract

The utility model relates to a kind of servo feeding mechanism for annular part, including mounting seat, further including servo motor assembly fixed on mounting seat, lifting assembly slidingly connected on mounting seat and synchronous wheel assembly transmission connection between servo motor assembly and lifting assembly, the bottom end of the lifting assembly is equipped with V block assembly for clamping workpiece and push material component for pushing workpiece into main shaft clamp;This kind of sports changes servo motor and drives V block assembly through synchronous wheel assembly transmission, workpiece on V block assembly is sent to the position consistent with clamp center, and the speed and moving position of operation can be adjusted by numerical control system using servo motor transmission, speed is more stable and faster, position is also more accurate.

Description

Technical Field

[0001] This utility model relates to the field of CNC lathes, specifically a servo feeding mechanism for ring-shaped parts. Background Technology

[0002] The feeding mechanism made by other manufacturers consists of two actions. The first action is that the hydraulic cylinder sends the workpiece in the V-block to a position consistent with the center of the fixture. The second action is to use the two-stage stroke of the hydraulic cylinder to push the workpiece into the fixture.

[0003] The feeding and pushing of the mechanism are achieved by hydraulic cylinders. Insufficient cylinder pressure will result in slow movement speed, affecting processing efficiency and potentially causing the workpiece to misalign with the fixture center. Excessive cylinder pressure will lead to excessive impact, shortening the cylinder's lifespan and increasing the risk of oil leaks. Furthermore, excessive pressure can cause deformation of the guide rails, leading to jamming or feeding position deviations. Adjusting the spring force on the cylinder is also challenging. Higher spring force requires greater pressure to overcome, increasing the lifespan of the mechanism's components. Insufficient spring force means the cylinder cannot adequately overcome the weight of the pushing assembly after feeding, causing the pushing assembly to bounce and repeatedly impact the workpiece during the ascent. Moreover, the springs will fatigue and deform after repeated feeding. The positioning of this mechanism is adjusted using a knurled nut. Different workpieces of different shapes and sizes require adjustment of this nut to move the V-block up and down, ensuring that the center of the workpiece and the center of the fixture are aligned. The hydraulic cylinder uses a two-stage function, which makes the entire mechanism relatively tall and cumbersome to adjust. This reduces the efficiency of workpiece changeover. Moreover, the nut itself will also experience positional deviation after multiple impacts, causing the center of the workpiece and the center of the fixture to be inconsistent, preventing the workpiece from being pushed into the fixture assembly. Therefore, further improvements are needed. Utility Model Content

[0004] The purpose of this invention is to solve the aforementioned problems and provide a simple and reasonable servo feeding mechanism for ring-shaped parts.

[0005] A servo feeding mechanism for ring-shaped parts includes a mounting base, a servo motor assembly fixed on the mounting base, a lifting assembly slidably connected to the mounting base, and a synchronous wheel assembly driven between the servo motor assembly and the lifting assembly. The bottom end of the lifting assembly is provided with a V-block assembly for clamping the workpiece and a pusher assembly for pushing the workpiece into the spindle fixture.

[0006] The objective of this utility model can also be achieved by the following technical measures: As a more specific embodiment, the servo motor assembly includes a servo motor and a reducer. The servo motor is longitudinally connected within the mounting base, the reducer is connected to the upper side of the servo motor, and its output shaft is driven by the rotating shaft of the servo motor. The output shaft of the reducer is driven by the synchronous pulley assembly.

[0007] As a further embodiment, the lifting assembly includes a lifting roller shaft, a first guide rail assembly, and an adjusting block. The lifting roller shaft is slidably connected to the mounting base via the first guide rail assembly. The adjusting block is connected to the bottom end of the lifting roller shaft. The V-shaped block assembly and the pushing assembly are mounted on the adjusting block.

[0008] As a further embodiment, the synchronous pulley assembly includes a driving synchronous pulley, a driven synchronous pulley, a transmission belt, and a transmission shaft. The transmission shaft is rotatably connected to the mounting base, with one end cooperating with the lifting roller shaft screw and the other end fixedly connected to the driven synchronous pulley. The driving synchronous pulley is fixed on the output shaft, and the transmission belt connects the driving synchronous pulley and the driven synchronous pulley.

[0009] As a further embodiment, the pushing assembly includes a pushing cylinder fixed on the adjusting block and a bearing seat slidably connected to the bottom surface of the adjusting block via a second guide rail assembly. The piston shaft of the pushing cylinder is drivenly connected to the bearing seat, and a rotating shaft is rotatably connected inside the bearing seat. One end of the rotating shaft extends out of the bearing seat and is connected to a top material head.

[0010] As a further embodiment, the first guide rail assembly includes two sets of ball bearing guide rails and two sets of ball bearing sliders. The two sets of ball bearing guide rails are fixed on the mounting base along the height direction, and the two sets of ball bearing sliders are slidably connected to the two sets of ball bearing guide rails respectively. The upper part of the lifting roller shaft is connected to the two sets of ball bearing sliders through a slider connecting seat.

[0011] As a further embodiment, the V-shaped block assembly includes a feeding pressure block bracket fixed to one side of the adjusting block, a V-shaped material support block fixed to the bottom of the feeding pressure block bracket, and a feeding pressure block adjustablely connected to the middle position of the feeding pressure block bracket. A clamping cavity is formed between the feeding pressure block and the V-shaped material support block, and a feeding port is formed on one side of the clamping cavity.

[0012] As a further embodiment, a support plate and a guide plate are sequentially connected to the bottom of the mounting base, and the V-shaped block assembly is disposed between the pushing assembly and the guide plate.

[0013] As a further embodiment, the bottom of the mounting base is connected to a guide plate, the guide plate has a guide opening that forms a linear sliding fit with the lower part of the lifting roller shaft, and a dustproof sealing ring that elastically abuts against the outer wall of the lifting roller shaft is connected inside the guide opening.

[0014] As a further embodiment, a metal shavings shield is also connected to the outer periphery of the mounting base, and the servo motor assembly, lifting assembly, and synchronous pulley assembly are housed inside the metal shavings shield.

[0015] The beneficial effects of this utility model are as follows: This utility model discloses a servo feeding mechanism for ring-shaped parts. This motion mechanism uses a servo motor to drive a V-block assembly through a synchronous pulley assembly, which delivers the workpiece on the V-block assembly to a position consistent with the center of the fixture. The pushing assembly is replaced with a cylinder to push the workpiece into the fixture. The servo motor drive allows the speed and position of the operation to be adjusted through a CNC system, resulting in a smoother and faster speed and a more accurate position. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the servo feeding mechanism installed on the main shaft in this utility model.

[0017] Figure 2 This is a schematic diagram (three-dimensional angle) of the servo feeding mechanism in this utility model.

[0018] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle.

[0019] Figure 4 This is a side view of the servo feeding mechanism in this utility model.

[0020] Figure 5 This is a schematic diagram of the structure of the first guide rail assembly and the V-block assembly in this utility model.

[0021] Figure 6 for Figure 4 Enlarged structural diagram at point B. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] See Figures 1 to 6 As shown, a servo feeding mechanism for ring-shaped parts includes a mounting base 1, a servo motor assembly 2 fixed on the mounting base 1, a lifting assembly 3 slidably connected to the mounting base 1, and a synchronous wheel assembly 4 driven between the servo motor assembly 2 and the lifting assembly 3. The bottom end of the lifting assembly 3 is provided with a V-block assembly 5 for clamping the workpiece and a pusher assembly 6 for pushing the workpiece into the clamp 10 of the spindle 9.

[0024] The agency's operational procedures: When there is no workpiece on the spindle 9 and the clamp 10 is in the released state, the workpiece rolls from the feed channel onto the V-block assembly 5 of the feeding mechanism. The servo motor assembly 2 drives the V-block assembly 5 to move downward through the synchronous wheel assembly 4. When the V-block assembly 5 moves to the center of the workpiece and aligns with the center of the spindle, the pusher assembly 6 pushes the workpiece onto the clamp 10 on the spindle 9, and the clamp 10 clamps the workpiece. The servo motor assembly 2 controls the V-block assembly 5 to move upward. After it moves into place, the machine tool begins processing.

[0025] The servo motor assembly 2 includes a servo motor 21 and a reducer 22. The servo motor 21 is longitudinally connected in the mounting base 1. The reducer 22 is connected to the upper side of the servo motor 21, and its output shaft 221 is drivenly connected to the rotating shaft of the servo motor 21. The output shaft 221 of the reducer 22 is drivenly connected to the synchronous pulley assembly 4.

[0026] This motion mechanism uses a servo motor 21 to drive the V-block assembly 5 via the synchronous pulley assembly 4, which then moves the workpiece on the V-block assembly 5 to a position aligned with the center of the fixture 10. The servo motor 21 allows for adjustment of the running speed and movement position via the CNC system, resulting in a smoother and faster operation and more accurate positioning.

[0027] Because the dimensions of each workpiece are different, the center of each workpiece on the V-block assembly 5 is also different. When feeding the workpiece, the center of the workpiece must be aligned with the center of the spindle. When changing products, you only need to change the values ​​on the CNC system to control the V-block assembly 5 to move up and down to the desired position. The changeover adjustment is more convenient and the changeover time is faster. The servo motor 21 can also ensure that the feeding position of the same workpiece is consistent, reducing the phenomenon that the workpiece cannot be fed into the fixture due to inaccurate positioning.

[0028] The lifting assembly 3 includes a lifting roller shaft 31, a first guide rail assembly, and an adjusting block 32. The lifting roller shaft 31 is slidably connected to the mounting base 1 through the first guide rail assembly. The adjusting block 32 is connected to the bottom end of the lifting roller shaft 31. The V-shaped block assembly 5 and the pushing assembly 6 are mounted on the adjusting block 32.

[0029] The bottom of the lifting roller shaft 31 is connected to a positioning dovetail block 36, and a dovetail groove 321 is correspondingly provided on one side of the adjusting block 32. Through the cooperation of the dovetail groove 321 and the positioning dovetail block 36, the adjusting block 32 is connected to the lifting roller shaft 31.

[0030] The synchronous pulley assembly 4 includes a driving synchronous pulley 41, a driven synchronous pulley 42, a transmission belt 43, and a transmission shaft 44. The transmission shaft 44 is rotatably connected to the mounting base 1, with one end cooperating with the lead screw of the lifting roller shaft 31 and the other end fixedly connected to the driven synchronous pulley 42. The driving synchronous pulley 41 is fixed on the output shaft 221, and the transmission belt 43 connects the driving synchronous pulley 41 and the driven synchronous pulley 42.

[0031] This mechanism uses a synchronous pulley assembly 4 for transmission, so the overall height of the mechanism will not be too high, and the height of the machine tool does not need to be too high.

[0032] The feeding assembly 6 includes a feeding cylinder 61 fixed on the adjusting block 32 and a bearing seat 62 slidably connected to the bottom surface of the adjusting block 32 via a second guide rail assembly 66. The piston shaft of the feeding cylinder 61 is connected to the bearing seat 62 in a transmission connection. The bearing seat 62 is provided with several tapered roller bearings 65. A rotating shaft 63 is rotatably connected to the bearing seat 62 by the several tapered roller bearings 65. One end of the rotating shaft 63 extends out of the bearing seat 62 and is connected to a top material head 64.

[0033] In traditional mechanisms, the sensors cannot accurately determine whether the workpiece is in place when it enters the fixture. If the workpiece is not in place when it enters the fixture, it will have already detached from the V-block assembly 5, resulting in the workpiece being shorter than expected. However, if the workpiece has not detached from the V-block assembly 5 and is not detected, the hydraulic cylinder will rise on its own, causing the tooling fixture, V-block, and its fixing parts to be pulled apart.

[0034] Furthermore, in the traditional structure, the pusher assembly 6 uses a structure with two guide pillars and bushings, which easily leads to iron filings entering between the bushing and the guide pillars, causing jamming or wear of the bushing. The pusher assembly 6 uses a spring structure for resetting, and due to repeated compression of the spring, the spring will fatigue and deform, causing the pusher device to reset at different positions. This results in interference between the workpiece and the pusher assembly 6 when the workpiece rolls from the feed channel to the V-block assembly 5. Since the pushing action is also achieved hydraulically, the hydraulic pressure needs to overcome the spring force to increase the pressure.

[0035] Therefore, the pusher assembly 6 is changed to a cylinder pusher structure. The sensor on the cylinder can determine whether the workpiece is pushed into place. If it is not pushed into place, the machine tool will alarm. This can prevent the workpiece from being too short or from rising before it leaves the V-block assembly 5, which would cause a collision. Because it is driven by a cylinder, it can be ensured that it reaches the correct position every time it resets. This can avoid the phenomenon that the pusher assembly 6 will interfere with the pusher assembly 6 when it rolls from the feed channel to the V-block assembly 5 due to different reset positions.

[0036] In this embodiment, the second guide rail assembly 66 consists of a ball guide rail and a ball slider. The guide part of the material assembly 6 is changed to a ball slider guide rail. The ball slider guide rail can ensure the smooth flow of the material pushing process and reduce the occurrence of jamming. In addition, the protective ends of the ball slider can effectively reduce the entry of iron filings into the guide rail, thereby increasing the service life.

[0037] The first guide rail assembly includes two sets of ball guide rails 33 and two sets of ball sliders 34. The two sets of ball guide rails 33 are fixed on the mounting base 1 along the height direction. The two sets of ball sliders 34 are slidably connected to the two sets of ball guide rails 33 respectively. The upper part of the lifting roller shaft 31 is connected to the two sets of ball sliders 34 through the slider connecting seat 35.

[0038] In traditional structures, because the processing environment is in the work area, iron filings generated by the workpiece tend to stick to the hard rail. Repeated movement of the hard rail causes it to wear out easily, requiring replacement. The hard rail is not a standard part, has many manufacturing processes, a long manufacturing cycle, and low interchangeability, which greatly affects the maintenance cycle and increases after-sales maintenance costs.

[0039] Therefore, this mechanism uses two sets of ball guide rails 33 and two sets of ball sliders 34 for guidance. Using ball slider guide rails can better improve the service life of this mechanism. Ball slider guide rails are standard parts that can be purchased directly. If wear and deformation occur, they can be purchased and replaced directly. The after-sales replacement cycle is also short and will not delay production.

[0040] The V-shaped block assembly 5 includes a feeding block support 51 fixed to one side of the adjusting block 32, a V-shaped material support block 52 fixed to the bottom of the feeding block support 51, and a feeding block 53 adjustablely connected to the middle position of the feeding block support 51. A clamping cavity 501 is formed between the feeding block 53 and the V-shaped material support block 52, and a feeding port 502 is formed on one side of the clamping cavity 501. The feeding block 53 is connected to the feeding block support 51 via a rotating shaft. One end of the feeding block 53 forms a clamping cavity 501 with the V-shaped material support block 52, while the other end is connected to a hexagonal bolt 54. The hexagonal bolt 54 can abut against the feeding block support 51 to adjust the opening and closing size of the feeding block 53. The V-shaped material support block 52 has an elongated hole, which is used to fasten it to the feeding block support 51. Moreover, due to the elongated hole, the V-shaped material support block 52 can also slide up and down to adjust its height, adapting to workpieces of different specifications.

[0041] The bottom of the mounting base 1 is sequentially connected to a support plate 11 and a guide plate 12. The V-shaped block assembly 5 is disposed between the pusher assembly 6 and the guide plate 12. The support plate 11 and the guide plate 12 can be an integral structure, or as in this embodiment, the guide plate 12 can be replaced on the support plate 11, and guide plates 12 of different lengths can be replaced according to different workpieces, which is more practical.

[0042] The bottom of the mounting base 1 is connected to a guide plate 13. The guide plate 13 has a guide opening 131 that forms a linear sliding fit with the lower part of the lifting roller shaft 31. A dustproof sealing ring 7 that elastically abuts against the outer wall of the lifting roller shaft 31 is connected inside the guide opening 131.

[0043] The outer periphery of the mounting base 1 is also connected to a metal chip shield 8, and the servo motor assembly 2, the lifting assembly 3 and the synchronous pulley assembly 4 are covered inside the metal chip shield 8.

[0044] This design incorporates a chip guard 8 and a dustproof sealing ring 7. Furthermore, the entire guide rail space is covered with a stainless steel sheet metal chip guard 8, which effectively separates the guide rail space from the machine tool processing area, effectively preventing chips from entering, reducing wear caused by chips, and increasing the service life of the guide rail.

[0045] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A servo feed mechanism for annular parts, comprising a mounting base (1), characterised in that: It also includes a servo motor assembly (2) fixed on the mounting base (1), a lifting assembly (3) slidably connected to the mounting base (1), and a synchronous wheel assembly (4) connected between the servo motor assembly (2) and the lifting assembly (3). The bottom end of the lifting assembly (3) is provided with a V-block assembly (5) for clamping the workpiece and a pusher assembly (6) for pushing the workpiece into the spindle fixture.

2. A servo feed mechanism for annular parts according to claim 1, characterized in that: The servo motor assembly (2) includes a servo motor (21) and a reducer (22). The servo motor (21) is longitudinally connected in the mounting base (1). The reducer (22) is connected to the upper side of the servo motor (21), and its output shaft (221) is driven by the rotating shaft of the servo motor (21). The output shaft (221) of the reducer (22) is driven by the synchronous pulley assembly (4).

3. A servo feed mechanism for annular parts according to claim 2, characterized in that: The lifting assembly (3) includes a lifting roller shaft (31), a first guide rail assembly and an adjusting block (32). The lifting roller shaft (31) is slidably connected to the mounting base (1) through the first guide rail assembly. The adjusting block (32) is connected to the bottom end of the lifting roller shaft (31). The V-shaped block assembly (5) and the pushing assembly (6) are mounted on the adjusting block (32).

4. A servo feed mechanism for annular parts according to claim 3, characterized in that: The synchronous pulley assembly (4) includes a driving synchronous pulley (41), a driven synchronous pulley (42), a transmission belt (43), and a transmission shaft (44). The transmission shaft (44) is rotatably connected to the mounting base (1), with one end cooperating with the lead screw of the lifting roller shaft (31) and the other end fixedly connected to the driven synchronous pulley (42). The driving synchronous pulley (41) is fixed on the output shaft (221), and the transmission belt (43) is connected between the driving synchronous pulley (41) and the driven synchronous pulley (42).

5. A servo feed mechanism for annular parts as defined in claim 3, characterized in that: The feeding assembly (6) includes a feeding cylinder (61) fixed on the adjusting block (32) and a bearing seat (62) slidably connected to the bottom surface of the adjusting block (32) via a second guide rail assembly (66). The piston shaft of the feeding cylinder (61) is connected to the bearing seat (62) in a transmission connection. A rotating shaft (63) is rotatably connected inside the bearing seat (62). One end of the rotating shaft (63) extends out of the bearing seat (62) and is connected to a top material head (64).

6. A servo feed mechanism for annular parts according to claim 3, characterized in that: The first guide rail assembly includes two sets of ball guide rails (33) and two sets of ball sliders (34). The two sets of ball guide rails (33) are fixed on the mounting base (1) along the height direction. The two sets of ball sliders (34) are slidably connected to the two sets of ball guide rails (33) respectively. The upper part of the lifting roller shaft (31) is connected to the two sets of ball sliders (34) through the slider connecting seat (35).

7. A servo feed mechanism for annular parts according to claim 3, characterized in that: The V-shaped block assembly (5) includes a feeding block support (51) fixed to one side of the adjusting block (32), a V-shaped material support block (52) fixed to the bottom of the feeding block support (51), and a feeding block (53) adjustablely connected to the middle position of the feeding block support (51). A clamping cavity (501) is formed between the feeding block (53) and the V-shaped material support block (52), and a feeding port (502) is formed on one side of the clamping cavity (501).

8. A servo feed mechanism for annular parts according to claim 1, characterized in that: The bottom of the mounting base (1) is connected in sequence to a support plate (11) and a guide plate (12), and the V-shaped block assembly (5) is disposed between the pusher assembly (6) and the guide plate (12).

9. A servo feed mechanism for annular parts according to claim 3, characterized in that: The mounting base (1) is connected to a guide plate (13) at the bottom. The guide plate (13) has a guide opening (131) that forms a linear sliding fit with the lower part of the lifting roller shaft (31). A dustproof sealing ring (7) that elastically abuts against the outer wall of the lifting roller shaft (31) is connected inside the guide opening (131).

10. A servo feed mechanism for annular parts according to claim 1, characterized in that: The outer periphery of the mounting base (1) is also connected to a chip protection cover (8), and the servo motor assembly (2), the lifting assembly (3) and the synchronous pulley assembly (4) are covered inside the chip protection cover (8).

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