Transverse micro-feeding device of grinding machine

Abstract

A manual feeding mechanism of the transverse micro-feeding device comprises a base, a shaft hole I, a shaft hole II and a shaft hole III are formed in the base, a connecting shaft is installed in the shaft hole I through a bearing assembly I, a bearing sleeve is arranged in the shaft hole III in a sliding fit mode, and a rotating shaft is installed in the bearing sleeve through a bearing assembly II. The rear end of the coupling shaft is connected with the front end of the rotating shaft in the shaft hole II through a clutch, the front end of the coupling shaft is connected with a feeding shaft through a coupling sleeve, and a hand wheel assembly is mounted at the rear end of the rotating shaft extending out of the base; the hand wheel assembly comprises a large hand wheel installed on the rotating shaft and an inner gear coaxially installed at the rear end of the base, a duplicate gear is installed in the large hand wheel through a bearing assembly IV, front-end gear teeth of the duplicate gear are meshed with the inner gear, rear-end gear teeth of the duplicate gear are meshed with an outer gear, and the outer gear is installed in a sealing plate at the rear end of the large hand wheel through a bearing assembly III. And a small hand wheel with a micro-feeding dial is mounted at the rear end of the outer gear.

Description

Technical Field

[0001] The utility model relates to a component structure of a grinding machine, in particular to a lateral micro-feeding device of a grinding machine. Background Art

[0002] A surface grinder is a precision grinding device used to process flat surfaces and is widely used in various fields of industrial production.

[0003] The lateral feed mechanism (micro feed device) of the surface grinder is one of the key components and an important factor affecting processing efficiency and quality. It plays a very important role in achieving precision grinding, high-precision dimensional processing and online error compensation.

[0004] At present, the resolution of micro-feeding devices can reach 0.001mm.

[0005] In grinding, the transverse feed mechanism should meet the following requirements:

[0006] 1. Separate micro-feed from coarse feed to improve the accuracy, resolution and stability of micro-displacement.

[0007] 2. The moving parts must have low friction and high stability in order to achieve high repeatability.

[0008] 3. The transmission element must have high rigidity, that is, the tool clamping part must have high rigidity.

[0009] 4. Good workability and easy to manufacture.

[0010] 5. It should be able to realize automatic control of micro-feed and have good dynamic performance.

[0011] Too much lateral feed will lead to excessive grinding surface roughness, while too little feed will affect processing efficiency. Therefore, the design of the lateral feed mechanism should meet the requirements of its feed amount being 0.002mm to 0.02mm, and be able to switch freely between manual feed and automatic feed. Utility Model Content

[0012] The technical problem to be solved by the utility model is to propose a lateral micro-feeding device for a grinding machine which meets the design requirements. The device is particularly suitable for grinding parts or tools with high precision and high finish and has high grinding efficiency.

[0013] The utility model discloses a lateral micro-feeding device for a grinding machine. The technical solution includes a feed shaft that drives the carriage to move. The rear end of the feed shaft is provided with a manual feed mechanism. The difference is that:

[0014] 1. The manual feed mechanism includes a base, and the interior of the base is coaxially opened with a front shaft hole I, a middle shaft hole II and a rear shaft hole III. A connecting shaft is installed in the shaft hole I through the front and rear bearing assemblies I, a bearing sleeve is installed in a sliding fit in the shaft hole III, and a rotating shaft is installed in the bearing sleeve through the front and rear bearing assemblies II. The rear end of the connecting shaft and the front end of the rotating shaft are connected in the shaft hole II through a clutch, and the front end of the connecting shaft is connected to the feed shaft through a coupling sleeve. A handwheel assembly is installed on the rear end of the rotating shaft extending out of the base.

[0015] 2. The handwheel assembly includes a large handwheel mounted on a rotating shaft and having a coarse feed scale, and an internal gear coaxially mounted on the rear end of the base. A duplex gear is mounted in the wheel body of the large handwheel via a bearing assembly IV. The front end teeth of the duplex gear engage with the internal gear, and the rear end teeth of the duplex gear engage with the external gear. The external gear is coaxially mounted in a sealing plate at the rear end of the large handwheel via a bearing assembly III. The rear end of the external gear extends out of the sealing plate and is coaxially mounted with a small handwheel with a fine feed scale.

[0016] Automatic carriage feeding mode: by pulling the large hand wheel backward into position, the clutch disengages the connection between the coupling shaft and the rotating shaft, and the front end teeth of the double gear disengage from the internal gear. Driven by the power mechanism, the feed shaft rotates to realize automatic feeding of the carriage.

[0017] Manual feed mode of the carriage: by pushing the large handwheel forward into position, the clutch engages the connection between the coupling shaft and the rotating shaft, and the front end teeth of the duplex gear engage the internal gear, and the large handwheel is turned to achieve manual rapid coarse feed of the carriage, or the small handwheel is turned to achieve manual slow fine feed of the carriage.

[0018] Beneficial effects of the utility model:

[0019] The utility model discloses a lateral micro-feeding device for a grinding machine, which has the functions of manual rapid feeding, manual micro-feeding and automatic feeding. It adopts a gear speed changing mechanism to fine-tune the feeding and perform micro-feed adjustment, and can realize ц-level (micron-level) feeding, thereby improving the processing accuracy of the workpiece. The feeding is highly accurate and stable, and can realize ц-level (micron-level) feeding. It has the function of switching between coarse feeding, micro-feeding and automatic feeding, and is suitable for grinding parts with high precision and high finish.

[0020] 1. The utility model has high feed sensitivity and can achieve ц-level (micron-level) feeding, thereby improving the processing accuracy of the workpiece.

[0021] 2. The micro-feeding function of this utility model (can reach 0.002цm) can realize tiny intermittent feeding and low-speed continuous motion to fine-tune the grinding wheel, realize precise dressing of the grinding wheel, and achieve low-roughness grinding of the workpiece surface.

[0022] 3. The utility model has a fast feeding function. The drag plate drives the workbench to move quickly to the next grinding position after grinding is completed, which has high work efficiency.

[0023] 4. The utility model can realize high-precision and high-finish mirror grinding of parts (reaching Ra0.06цm).

[0024] 5. The utility model has good stability, and the micro-feed and coarse feed are operated separately, which improves the accuracy, resolution and stability of micro-displacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural diagram of an implementation method of the utility model.

[0026] Figure number identification: 1. Feed shaft; 2. Base; 2-1. Shaft hole I; 2-2. Shaft hole II; 2-3. Shaft hole III; 3. Connecting shaft; 4. Bearing assembly I; 5. Bearing sleeve; 6. Bearing assembly II; 7. Rotating shaft; 8. Clutch; 9. Coupling sleeve; 10. Large handwheel; 11. Internal gear; 12. Bearing assembly IV; 13. Duplex gear; 14. External gear; 15. Baffle; 16. Bearing assembly III; 17. Closing plate; 18. Small handwheel; 19. Ball pin; 20. Elastic pin. DETAILED DESCRIPTION

[0027] The technical solution of the present utility model will be further described below with reference to the embodiments shown in the accompanying drawings.

[0028] The utility model discloses a lateral micro-feeding device for a grinding machine, comprising a manual feeding mechanism capable of realizing automatic feeding and manual feeding of a carriage respectively. The manual feeding mechanism comprises a connecting shaft 3, a rotating shaft 7 and a handwheel assembly arranged on a base 2.

[0029] The base 2 (installed on the bed of the grinding machine) is a cylinder with a small front end and a large rear end. The interior of the base 2 is coaxially provided with a front shaft hole I2-1, a middle shaft hole II2-2 and a rear shaft hole III2-3. The connecting shaft 3 is installed in the shaft hole I2-1 through a bearing assembly I4 (two bearings at the front and rear ends). The front end of the connecting shaft 3 extends out of the base 2 and is coaxially connected to the rear end of the feed shaft 1 (ball screw, the nut seat screwed on the ball screw is connected to the carriage) through a coupling sleeve 9; the shaft hole III 2-3 is fitted with a bearing sleeve 5 in a sliding manner. The rotating shaft 7 is mounted in the bearing sleeve 5 through a bearing assembly II 6 (three bearings at the front, middle and rear). The front end of the rotating shaft 7 and the rear end of the connecting shaft 3 are both in the shaft hole II 2-2 and are connected and separated by a clutch 8. The bearing sleeve 5 is provided with two front and rear clamping holes. The alignment clamping holes are provided with a ball pin 19 with downward elastic return inside the base 2. The rear end of the rotating shaft 7 extends out of the base 2. The handwheel assembly is mounted on the rear end of the rotating shaft 7. Figure 1 shown.

[0030] The handwheel assembly includes a large handwheel 10 with a coarse feed scale and a small handwheel 18 with a fine feed scale. The large handwheel 10 is coaxially fixedly mounted on the rotating shaft 7. A double gear 13 eccentric to the axial direction is installed inside the wheel body of the large handwheel 10 through a bearing assembly IV 12 (a needle bearing). The front end small diameter gear teeth of the double gear 13 (located outside the front end of the wheel body) mesh with the large diameter internal gear 11. The internal gear 11 is coaxially fixedly mounted on the rear end surface of the base 2. The double gear 13 3, the rear end large diameter gear teeth are located at the rear end of the wheel body; the rear end of the large hand wheel 10 is coaxially mounted with a sealing plate 17 (located on the rear side of the rear end gear teeth of the duplex gear 13), the sealing plate 17 is internally mounted with an external gear 14 via a bearing assembly III 16 (a needle bearing), the front end small diameter gear teeth of the external gear 14 (located outside the front end of the sealing plate 17) are meshed with the rear end gear teeth of the duplex gear 13, the rear end of the external gear 14 extends out of the sealing plate 17, and the small hand wheel 18 is fixedly mounted on the rear end of the external gear 14, as shown in FIG. Figure 1 shown.

[0031] A buffer mechanism is provided between the large hand wheel 10 and the base 2. The buffer mechanism includes elastic pins 20 extending from the front end surface of the large hand wheel 10 and uniformly distributed around the circumference. A baffle 15 is provided on the rear end surface of the base 2 corresponding to the elastic pins 20. Figure 1 shown.

[0032] The utility model has three feeding modes:

[0033] 1. Automatic feeding mode: Manually pull the handwheel assembly backward into place (the elastic ball pin 19 is locked in the front hole), and the large handwheel 10 pulls the rotating shaft 7 backward to separate the rotating shaft 7 from the connecting shaft 3 (the front and rear staggered teeth of the clutch 8 are separated). At the same time, the front end teeth of the double gear 13 are separated from the internal gear 11. Driven by the power mechanism, the feed shaft 1 rotates to realize the automatic horizontal feeding of the carriage.

[0034] 2. Manual coarse feed mode: manually push the handwheel assembly forward into position (the elastic ball pin 19 is stuck in the rear hole, and the elastic pin 20 hits the baffle 15 to achieve buffering), and the large handwheel 10 pushes the rotating shaft 7 forward so that the rotating shaft 7 is combined with the connecting shaft 3 (the front and rear staggered teeth of the clutch 8 are engaged). At the same time, the front end teeth of the double gear 13 are combined with the internal gear 11. The large handwheel 10 is shaken by handle I, and the large handwheel 10 drives the feed shaft 1 to rotate through the rotating shaft 7, clutch 8, connecting shaft 3, and coupling sleeve 9, thereby realizing manual rapid horizontal feeding of the carriage.

[0035] 3. Manual micro-feed mode: manually push the handwheel assembly forward into position (the elastic ball pin 19 is stuck in the rear hole, and the elastic pin 20 hits the baffle 15 to achieve buffering), and the large handwheel 10 pushes the rotating shaft 7 so that the rotating shaft 7 is combined with the connecting shaft 3 (the front and rear staggered teeth of the clutch 8 are engaged). At the same time, the front end teeth of the duplex gear 13 are combined with the internal gear 11. The small handwheel 18 is shaken by handle II. The small handwheel 18 drives the feed shaft 1 to rotate through the external gear 14, duplex gear 13, internal gear 11, large handwheel 10, rotating shaft 7, clutch 8, connecting shaft 3, and coupling sleeve 9, thereby realizing the lateral manual slow feeding of the carriage. The minimum scale value of the micro-feed dial on the small handwheel 18 is 0.002 mm.

[0036] The utility model has reasonable structure, high precision, accurate feeding, good stability and strong carrying capacity. It adopts gear speed change mechanism to fine-tune feeding and perform micro-feed adjustment, which can achieve ц-level (micron-level) feeding; manual feeding and automatic feeding can be achieved by engaging or disengaging the clutch, which is convenient for rapid switching of different modes, has high working efficiency and good workpiece processing accuracy.

Claims

1. A lateral micro-feeding device for a grinding machine, comprising a feed shaft (1) for driving a carriage, wherein a manual feed mechanism is provided at the rear end of the feed shaft (1), and characterized in that: The manual feeding mechanism comprises a base (2), wherein the base (2) is coaxially provided with a front shaft hole I (2-1), a middle shaft hole II (2-2) and a rear shaft hole III (2-3), a coupling shaft (3) is installed in the shaft hole I (2-1) via a bearing assembly I (4), a bearing sleeve (5) is installed in the shaft hole III (2-3) in a sliding manner, a rotating shaft (7) is installed in the bearing sleeve (5) via a bearing assembly II (6), a rear end of the coupling shaft (3) and a front end of the rotating shaft (7) are connected in the shaft hole II (2-2) via a clutch (8), a front end of the coupling shaft (3) is connected to the feed shaft (1) via a coupling sleeve (9), and a handwheel assembly is installed on the rear end of the rotating shaft (7) extending out of the base (2); The handwheel assembly comprises a large handwheel (10) mounted on a rotating shaft (7) and having a coarse feed scale, and an internal gear (11) coaxially mounted on the rear end of a base (2); a double gear (13) is mounted in the wheel body of the large handwheel (10) via a bearing assembly IV (12); the front end gear teeth of the double gear (13) mesh with the internal gear (11), and the rear end gear teeth of the double gear (13) mesh with the external gear (14); the external gear (14) is coaxially mounted in a sealing plate (17) at the rear end of the large handwheel (10) via a bearing assembly III (16); the rear end of the external gear (14) extends out of the sealing plate (17) and is coaxially mounted with a small handwheel (18) having a fine feed scale.

2. The grinding machine transverse micro-feed device according to claim 1, characterized in that: By pulling the large hand wheel (10) backward to the right position, the clutch (8) is disconnected from the connection between the coupling shaft (3) and the rotating shaft (7), and the front end gear teeth of the double gear (13) are disengaged from the internal gear (11). The feed shaft (1) rotates under the drive of the power mechanism to realize the automatic feeding of the carriage.

3. The grinding machine transverse micro-feed device according to claim 1, characterized in that: By pushing the large hand wheel (10) forward to a position, the clutch (8) is combined with the connection between the coupling shaft (3) and the rotating shaft (7) and the front end gear teeth of the double gear (13) are meshed with the internal gear (11), and the large hand wheel (10) is rotated to realize manual rapid coarse feeding of the carriage, or the small hand wheel (18) is rotated to realize manual slow fine feeding of the carriage.

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