CN102107368A

CN102107368A - Method and device for automatically clamping workpieces

Info

Publication number: CN102107368A
Application number: CN 201010614285
Authority: CN
Inventors: 王自勤; 田丰果; 童韬; 陈汉斌; 陈家兑; 刘勇
Original assignee: GUIZHOU JIANXIN NANHAI TECHNOLOGY Co Ltd; GUIZHOU PROVINCE ELECTROMECHANICAL EQUIPMENT ENGINEERING TECHNOLOGY RESEARCH CENTER
Current assignee: GUIZHOU JIANXIN NANHAI TECHNOLOGY Co Ltd; GUIZHOU PROVINCE ELECTROMECHANICAL EQUIPMENT ENGINEERING TECHNOLOGY RESEARCH CENTER
Priority date: 2010-12-30
Filing date: 2010-12-30
Publication date: 2011-06-29
Anticipated expiration: 2030-12-30
Also published as: CN102107368B

Abstract

The invention discloses a method and device for automatically clamping workpieces, which are characterized in that workpieces are clamped by two sets of servo systems, a fixed clamp hole is a non-circular hole, and the shape and size of an external outline of a lock nut are consistent with the shape and size of the fixed clamp hole so as to ensure the lock nut and the fixed clamp hole can be matched with each other; a set of servo system is used for driving a clamping chuck to get into (or get out of) the fixed clamp hole, so that the lock nut can be matched with the clamp hole or separated from the clamp hole; and the other set of servo system is used for adjusting the phase position of the lock nut, and driving a main shaft to have gyroscopic motion when the lock nut and the clamp hole are mutually matched, thereby achieving the purpose of clamping workpieces. By using the method and device disclosed by the invention, the clamping torque can be controlled accurately, the torque can be adjusted, the clamping position can be remembered, and the clamping operation can be completed quickly.

Description

Self-holding method of workpiece and device thereof

Technical field

The invention belongs to field of mechanical technique, relate in particular to the self-holding method of a kind of workpiece, also relate to the workpiece automatic clamping device of realizing this method simultaneously.

Background technology

At present, clamp for workpiece pneumatic, spring force, the modes such as manual of adopting more.Adopt these modes to clamp, be not easy to adjust flexibly clamping force, can not accurately control clamping force, thereby cause clamping force not enough or clamp excessively easily, the not enough workpiece of clamping force gets loose easily, and the excessive then workpiece of clamping force is pressed from both sides bad.Inconvenient operation when adopting manual clamping the, efficient are low.

Summary of the invention

The objective of the invention is to overcome above-mentioned shortcoming and provide a kind ofly can accurately control clamping torque, moment is adjustable, the clamping position can be remembered and the self-holding method of workpiece that can clamp fast.

Another object of the present invention also is to provide the workpiece automatic clamping device of this method of realization.

Purpose of the present invention and solve its technical problem underlying and realize by the following technical solutions:

The self-holding method of workpiece of the present invention comprises the steps:

(1) according to the dimensions of workpiece, select suitable collet for use, collet is placed locking nut, and locking nut is installed on the main shaft, adjust the nut phase place simultaneously and make it can match with fixing hole clipping;

(2) clamping torque to locking nut movement velocity, main shaft gyration speed, clamping time, locking nut carries out the digitlization input in control system;

(3) start-up control system, servomotor A start to drive locking nut and enter fixedly hole clipping, and it is cooperated with fixing hole clipping, and putting in place, afterwards servomotor A is slack;

(4) gripping section with workpiece places in the collet hole, and the clamping time arrives, and servo motor B starts, and drive shaft is done gyration, when the locking torque of locking nut reaches the setting moment values, and the motor stall.This moment, workpiece was clamped with the moment values of setting.

(5) after workpiece clamped, servomotor A started and drives locking nut and leave fixedly that hole clipping moves to the workpiece machining position, and putting in place, afterwards servomotor A is slack.

The self-holding method of above-mentioned workpiece, wherein: fixedly hole clipping is a non-circular hole, fixedly hole shape in the hole clipping, size are consistent with locking nut outer contour shape size;

The self-holding method of above-mentioned workpiece, wherein: clamping torque is set by control system.

Workpiece automatic clamping device of the present invention, comprise main axle moving parts, main shaft gyration parts, frame, rack-mounted sleeve A, the sleeve B that is connected with sleeve A, fixedly hole clipping is opened in frame, wherein: the main axle moving parts by main shaft, be installed in that locking nut, sky on the main shaft is enclosed within collet in the locking nut, is sleeved on parts of bearings A on the main shaft, is installed in parts of bearings B, the feed screw nut parts on the main shaft, the servomotor A that is installed on the sleeve B constitutes; The main shaft gyration parts by servo motor B, be installed in the gear B of its output shaft, constitute with gear B meshed gears A;

Above-mentioned workpiece automatic clamping device, wherein: described parts of bearings A by be sleeved on bearing block on the main shaft, be fixed on the key on the bearing block, the bearing A that is installed on the bearing block constitutes.

Above-mentioned workpiece automatic clamping device, wherein: described parts of bearings B is by being installed in bearing C on the main shaft, being fixed on bearing (ball) cover on the main shaft, cooperating with bearing and the sliding sleeve that is connected with feed screw nut, the feather key that is installed on the sliding sleeve constitute.

Above-mentioned workpiece automatic clamping device, wherein: described feed screw nut parts by leading screw, be installed on the leading screw and be fixed on feed screw nut on the sliding sleeve, be installed in bearing B on the leading screw, the connecting shaft cover that is used to connect leading screw and servomotor A constitutes.

The present invention compared with prior art has tangible beneficial effect, by above technical scheme as can be known, utilize two cover servo-drive systems to come clamping work pieces, fixedly hole clipping is a non-circular hole, and the outer contour shape of locking nut, size are consistent with shape, the size of fixing hole clipping, guarantees that they can work in coordination; One cover servo-drive system drives chuck and enters (or leaving) fixedly hole clipping, and locking nut can be cooperated or separate with hole clipping; Another set of servo-drive system be used to adjust the locking nut phase place and when locking nut matches with hole clipping drive shaft do gyration, reach the purpose of clamping work pieces.Adopt electrical servo as drive system, the control clamping device has realized that not only workpiece clamps automatically, clamps the efficient height, and can remember the loading position automatically; Adopt clamping torque as the control parameter, effective clamping work pieces, and can guarantee effectively that workpiece is not damaged.By changing the clamping demand that different collets can satisfy the different size workpiece, its adaptability is strong.

Below further specify beneficial effect of the present invention by the specific embodiment.

Description of drawings

Fig. 1 is the structural representation of workpiece automatic clamping device;

Fig. 2 is a workpiece automatic clamping device graphics.

Mark among the figure:

1, frame, 2, collet, 3, locking nut, 4, main shaft, 5, gear A, 6, sleeve A, 7, sleeve B, 8, servomotor A, 9, servo motor B, 10, gear B, 11, bearing A, 12, leading screw, 13, feed screw nut, 14, bearing B, 15, the connecting shaft cover, 16, key, 17, feather key, 18, bearing C, 19, sliding sleeve, 20, bearing block, 21, fixing hole clipping.

The specific embodiment

Embodiment 1

With the self-holding method of the workpiece of Φ 8 is example, comprises the steps:

(1) selects suitable collet for use for the workpiece of Φ 8, collet is placed locking nut, and locking nut is installed on the main shaft, adjusting the nut phase place simultaneously makes it can match with fixing hole clipping, fixedly hole clipping is a non-circular hole, and fixedly hole shape in the hole clipping, size are consistent with locking nut outer contour shape size;

(2) input locking nut point-to-point speed is that 30cm/s, main shaft gyration speed are 2000RPM, clamping time to be that the clamping torque of 20s, locking nut is 5N.m in control system;

(3) start-up control system, servomotor A startup driving locking nut enters fixedly hole clipping with the speed of 30cm/s, it is cooperated with fixing hole clipping, putting in place, servomotor A is slack (at this moment in the back, system writes down straight-line original position of main shaft and final position automatically, and after this main shaft can move reciprocatingly between two positions);

(4) gripping section with workpiece places in the collet hole, the clamping time, 20s arrived, servo motor B starts, drive shaft is done gyration with the speed of 2000RPM, when the locking torque of locking nut reaches setting moment values 5N.m, the servomotor stall, this moment, workpiece was clamped with the moment values of setting (5N.m).

Embodiment 2

Shown in Fig. 1-2, the workpiece automatic clamping device comprises main axle moving parts, main shaft gyration parts, frame 1, is installed in the sleeve A6 on the frame 1, the sleeve B7 that is connected with sleeve A6, and fixedly hole clipping 21 is opened in frame 1, wherein:

Described main axle moving parts by main shaft 4, be installed in that locking nut 3, sky on the main shaft 4 is enclosed within collet 2 in the locking nut 3, is sleeved on parts of bearings A on the main shaft 4, is installed in parts of bearings B, the feed screw nut parts on the main shaft 4, the servomotor A8 that is installed on the sleeve B7 constitutes.Described parts of bearings A by be sleeved on bearing block 20 on the main shaft 4, be fixed on the key 16 on the bearing block 20, the bearing A11 that is installed on the bearing block 20 constitutes.Described parts of bearings B is by being installed in bearing C18 on the main shaft 4, being fixed on bearing (ball) cover on the main shaft 4, cooperating with bearing and the sliding sleeve 19 that is connected with feed screw nut, the feather key 17 that is installed on the sliding sleeve 19 constitute.Described feed screw nut parts by leading screw 12, be installed on the leading screw and be fixed on feed screw nut 13 on the sliding sleeve 19, be installed in bearing B14 on the leading screw 12, the connecting shaft cover 15 that is used to connect leading screw 12 and servomotor 8 constitutes.

The main shaft gyration parts by servo motor B 9, be installed in the gear B 10 of its output shaft, constitute with gear B 10 meshed gears A5.

Claims

1. the self-holding method of workpiece comprises the steps:

(4) gripping section with workpiece places in the collet hole, and the clamping time arrives, and servo motor B starts, and drive shaft is done gyration, when the locking torque of locking nut reaches the setting moment values, and the motor stall, this moment, workpiece was clamped with the moment values of setting;

2. the self-holding method of workpiece as claimed in claim 1 is characterized in that: fixedly hole clipping is a non-circular hole, and fixedly hole shape in the hole clipping, size are consistent with locking nut outer contour shape size.

3. as claim 1 or the self-holding method of described workpiece, it is characterized in that: clamping torque is set by control system.

4. workpiece automatic clamping device, comprise the main axle moving parts, the main shaft gyration parts, frame (1), be installed in the sleeve A (6) on the frame (1), the sleeve B (7) that is connected with sleeve A (6), fixedly hole clipping (21) is opened in frame (1), it is characterized in that: the main axle moving parts are by main shaft (4), be installed in the locking nut (3) on the main shaft (4), sky is enclosed within the collet (2) in the locking nut (3), be sleeved on the parts of bearings A on the main shaft (4), be installed in the parts of bearings B on the main shaft (4), the feed screw nut parts, the servomotor A (8) that is installed on the sleeve B (7) constitutes; The main shaft gyration parts by servo motor B (9), be installed in its output shaft gear B (10), constitute with gear B (10) meshed gears A (5).

5. workpiece automatic clamping device as claimed in claim 4 is characterized in that: described parts of bearings A by be sleeved on bearing block (20) on the main shaft (4), be fixed on the key (16) on the bearing block (20), the bearing A (11) that is installed on the bearing block (20) constitutes.

6. as claim 4 or 5 described workpiece automatic clamping devices, it is characterized in that: described parts of bearings B is by being installed in bearing C (18) on the main shaft (4), being fixed on bearing (ball) cover on the main shaft (4), cooperating with bearing and the sliding sleeve (19) that is connected with feed screw nut, the feather key (17) that is installed on the sliding sleeve (19) constitute.

7. workpiece automatic clamping device as claimed in claim 6 is characterized in that: described feed screw nut parts by leading screw (12), be installed on the leading screw and be fixed on feed screw nut (13) on the sliding sleeve (19), be installed in bearing B (14) on the leading screw (12), the connecting shaft cover (15) that is used to connect leading screw (12) and servomotor A (8) constitutes.