CN108188806A - One kind is general to use turnover fixture - Google Patents

Abstract

The invention relates to a universal turning fixture device, which is composed of a linear drive part, a rotary drive part and a lifting part. The linear drive part is driven by a linear cylinder and can stop at two working positions to process workpieces. The rotary driving part is driven by a rotary cylinder, and after adjusting the hydraulic buffer, it can rotate at a fixed angle of 180° to drive the fixture and the workpiece to turn over. The lifting part adopts a motor-driven screw lifter. The device has a large jacking force, a simple structure, and takes up less space, and can realize accurate lifting of the fixture and the workpiece. The invention can clamp, turn over, translate and lift the workpiece under the working condition of machine tool coolant splashing, realize the centralization of processing procedures, and automatically realize the front and back processing of the workpiece in one machine tool.

Description

A universal turning fixture

technical field

The invention relates to a universal turning fixture mechanism, which can be used in a machine tool to clamp and turn a workpiece to complete the processing of the front and back of the workpiece.

Background technique

The form of machine tool processing products is usually to process one side of the workpiece first, and then clamp and process the other side again, that is, to complete a workpiece often requires multiple clamping. This kind of processing method is inefficient, and each surface needs to be clamped once, which can easily lead to workpiece pinching and positioning errors. In the current production competition environment, more and more units begin to pay attention to the centralization of processing procedures.

The overturning fixture mechanism has a wide range of applications in the field of machine tool workpiece processing. It can translate and flip the workpiece with high precision, avoiding the flipping and re-clamping of the workpiece, avoiding the error caused by artificial re-clamping, and improving the machining accuracy and production efficiency.

In the prior technology (patents such as Li Shujun, application number: 201210288496.8, application date October 2012 "An automatic turning device based on workpiece positioning"), the rotating cylinder and coupling drive the power shaft to rotate, thereby driving the turning frame and its The internally clamped workpiece rotates. Although the device realizes 180° turning of the workpiece, the turning frame may hit the tool during the turning process, and it cannot be applied to special cases such as thin-walled workpieces that require vacuum suction cup clamping, and the general applicability is not high.

Contents of the invention

The object of the present invention is to design a turning fixture with simple and reliable structure, high degree of automation, and improved processing efficiency and processing accuracy for the demand of centralized processing procedures.

The turning fixture for gas flooding proposed by the present invention includes a machine tool 17\ a linear motion part, a turning part, a lifting part and a clamping part, wherein:

The clamping part is composed of an electromagnetic lock 4 and a clamping bolt 7;

A machine tool workbench 16 is provided on the machine tool 17, and a vacuum sucker mother sucker 13 is provided on the machine tool workbench;

The linear motion part is composed of the first linear cylinder 19, the terminal position limiter 18, the intermediate position limiter 20 and the rotary cylinder slide 21. The two ends of the first linear cylinder 19 are fixed on the machine tool 17 through components. There is a second guide rail, a terminal position limiter 18 is provided on one side of the first linear cylinder 19, and an intermediate position limiter 20 is provided at any other position. The rotary cylinder slide table 21 is located on the second guide rail and can be positioned above it. To move back and forth, the first linear cylinder 19 is connected to the rotary cylinder slide 21 to drive the rotary cylinder slide 21 to move back and forth on the second guide rail; The effect of moving in the linear direction makes the rotary cylinder 2 have two working positions on the guide rail of the first linear cylinder 19; s position;

The overturning part is composed of hydraulic buffer 1, rotating cylinder 2, overturning frame guide rail 3, overturning frame 5, vacuum suction cup 6 and fixed ring 8, and the hydraulic buffer 1 is located on both sides of the rotating cylinder 2. The buffer 1 adjusts the rotary cylinder 2 so that its stroke is continuously close to 180°; one side of the rotary cylinder 2 is connected by bolts and installed on the rotary cylinder slide 21, the flip frame guide rail 3 is fixed on the rotary cylinder 2 by bolts, and the rotary cylinder 2 Drive the turning frame guide rail 3 to rotate, and the turning frame guide rail 3 and the turning frame 5 are fixed by the electromagnetic lock 4, so as to realize the 180° rotation of the entire turning part; when in use, the vacuum suction cup 6 that absorbs the workpiece passes through the clamping bolt 7 fixed on the flip frame 5;

The lifting part consists of a screw lifter 9, a screw lifter slide 10, a motor 11, a first guide rail 15 and a second linear cylinder. The first guide rail 15 is fixed on the machine tool 17, and the screw lifter slide 10 is located on the first guide rail 15. and can move back and forth on it, the screw lifter 9 is fixed on the screw lift slide table 10, the screw lifter 9 is connected to the flip frame guide rail 3 through the fixing ring 8, and the motor 11 is fixed on the comparison rod through the motor mounting flange 12 On one side of the elevator slide table 10, the motor 11 is connected to the screw lifter 9 to drive the screw lifter 9 to lift, and the screw lifter 9 lifts the entire turning part through the fixing ring 8; when lifting, the electromagnetic lock 4 is energized and disconnected, turning over Sliding occurs between the frame guide rail 3 and the flip frame 5 by flipping the frame guide rail; the first guide rail 15 is provided with a second linear cylinder, which is connected to the screw lift slide table 10, and the screw lift slide table 10 is formed by the second linear cylinder. Driven by two linear cylinders, linear motion is performed on the first guide rail 15.

In the present invention, the rotary cylinder 2, the electromagnetic lock 4, the motor 11, the first linear cylinder and the second linear cylinder are respectively connected to a motion control system through a data communication interface, and the motion control system is connected to a PC.

The basic process of the present invention for workpiece translation, lifting, and turning is as follows:

1. Thin-walled workpieces that require vacuum suction cup clamping:

2. Conventional workpieces that can be clamped directly:

In the present invention, the vacuum chuck female chuck seat 14 is made in order to adjust the height of the vacuum chuck female chuck 13 . It can be adjusted or canceled according to the actual situation.

The present invention adopts the mode that the unilateral linear cylinder 19 is driven to carry out linear motion. According to actual needs, bilateral linear cylinder drive can also be used to achieve smoother linear movement.

The present invention adopts the mode that the screw mandrel lifter 9 is driven by the motor 11 on the side of the device to perform the lifting of the overturning fixture. According to actual needs, screw lifts on both sides can also be used for lifting. Considering the splashing of coolant in the machine tool, the screw lifter 9 driven by the motor 11 can also be replaced with an electric screw to achieve the waterproof performance of the entire set of flip fixtures or use cylinder jacking to improve the integrity of the device.

In the present invention, the overturning frame 5 is clamped with vacuum suction cups and sub-suction cups 6 . The use of vacuum suction cups is to facilitate the clamping of thin-walled parts. In actual use, if it is necessary to process the front and back sides of parts with a general thickness, it is not necessary to install the vacuum sucker sub-chuck 6 and the mother sucker 13 used in the present invention.

Technical advantage of the present invention:

1. In the present invention, an air cylinder is used for turning over and linear motion. The structure of the cylinder is simple, the torque thrust is larger than that of a motor with similar volume, and the control is easy. Compared with the motor, it also has the advantage of being waterproof. In the case of constructing the same performance equipment, the cost is lower.

2. In the present invention, conventional workpieces can be clamped, and thin-walled parts can also be clamped by vacuum suction cups, so that it is suitable for processing various workpieces and is more flexible in use.

3. In the present invention, the turning fixture device can perform four operations of translation, lifting, turning and lowering on the clamped workpiece, and can be arranged correspondingly according to different spaces inside the machine tool. Compared with the previous flip fixture, it is more flexible and versatile.

4. In the present invention, the linear cylinder has two working positions, and the position of the rotary cylinder slide 21 on the guide rail is limited by the middle limit device 20 and the end limit device 18 respectively. Such a design does not require the feedback position information of the linear cylinder, and it is easier to operate, control and modify the working position.

5. In the present invention, the rotary cylinder has a compact structure, a small installation space requirement, an adjustable swing angle, and a modular structure. For workpieces with limited machine tool modification, the space utilization rate can be effectively improved. In addition, similar to the linear cylinder, the rotation angle of the rotary cylinder is fixed, and there is no need for feedback and rotation angle control.

Description of drawings

Fig. 1 is an overall structural diagram of the combination of the linear motion part driven by the linear cylinder and the rotary cylinder part driven by the rotary cylinder in the present invention.

Fig. 2 is an overall structural diagram of the motor-driven screw lifter part of the present invention.

Fig. 3 is an overall structural diagram of the turning and clamping part of the present invention.

Fig. 4 is an overall structural view of the present invention, that is, a general-purpose turning fixture installed on a machine tool workbench.

Numbers in the figure: 1 is the hydraulic buffer, 2 is the rotary cylinder, 3 is the guide rail of the flip frame, 4 is the electromagnetic lock, 5 is the flip frame, 6 is the vacuum suction cup, 7 is the clamping bolt, 8 is the fixing ring, 9 10 is the slide table of the screw lifter, 11 is the motor, 12 is the motor mounting flange, 13 is the vacuum suction cup mother suction cup, 14 is the vacuum suction cup, 15 is the first guide rail, 16 is the machine tool table, 17 is the Machine tool, 18 is the terminal limiter, 19 is the first linear cylinder, 20 is the intermediate limiter, and 21 is the rotary cylinder slide table.

Detailed ways

A general turning device of the present invention will be further described in detail with reference to the accompanying drawings, but the protection scope of the patent of the present invention is not limited thereto.

Example 1:

Please refer to Fig. 1-Fig. 4, Fig. 1 is the structural diagram of the linear drive part and the overturning drive part of a kind of universal overturning device of the present invention, Fig. 2 is the structure diagram of the lifting part for the lifting and overturning frame of the present invention, Fig. 3 is the overall structural diagram of the present invention after being installed on the machine tool workbench.

Referring to Fig. 1, Fig. 1 shows the linear drive part and the rotary drive part of the turning fixture. Firstly, the hydraulic buffers 1 on both sides of the rotary cylinder 2 are adjusted so that the stroke of the rotary cylinder 2 is constantly approaching 180°, so as to avoid the workpiece from colliding with the vacuum sucker mother sucker 13 or the machine table 16 when the turning frame 5 falls. After the rotary cylinder 2 is adjusted, the rotary cylinder 2 and the rotary cylinder slide table 21 are connected by bolts, and the rotary cylinder slide table 21 equipped with the rotary cylinder 2 is fixed on the guide rail of the first linear cylinder 19 . According to the positions of the two vacuum sucker mother suckers 13 on the machine tool workbench 16, the positions of the middle stopper 20 and the terminal stopper 18 on the first linear cylinder 19 are selected. After the selection, the middle limit device 20 and the end limit device 18 are installed on the first linear cylinder 19 by bolts.

Referring to FIG. 2 , FIG. 2 shows that the lifting part of the turning fixture is used for the screw elevator 9 . The motor 11 is installed on the motor flange 12, and the fixing ring 8 is fixed on the screw lifter 9 by bolts. Since the screw lifter 9 will follow the second linear cylinder for linear motion, the guide rail 15 is installed on the machine tool, and the screw lifter slide table 10 is installed on the guide rail 15 . After the linear cylinder 19 drives the overall fixture to the station, the screw lifter 9 controls the fixture turning frame 5 to lift through the motor 11 .

Referring to Fig. 3, Fig. 3 is the flip part of the flip jig. First, the workpiece/vacuum suction cup is installed into the flip frame 5, and clamped by the clamping bolt 7. Next, the overturning frame 5 is packed into the fixed ring 8, and the overturning frame guide rail 3 is fixed on the rotary cylinder 2 by bolts. The relative movement in the linear direction can be carried out through the guide rail at the connection between the two, and the movement of the first guide rail 15 can also be locked by the electromagnetic lock 4 to achieve the purpose of fixing and reducing the elastic deformation of the fixture and the workpiece. In the actual working process, the rotating cylinder 2 drives the turning frame guide rail 3 to rotate by 180°, thereby driving the turning frame 5 and the clamped workpiece/vacuum suction cup to rotate. And when needing to carry out the lifting of fixture, screw mandrel lifter 9 drives fixed ring 8 to rise/fall, thereby drives turning frame 5 and its internal workpiece to carry out lifting. When lifting, only have screw lifter 9, overturning frame 5 and internal workpiece 6 thereof have carried out lifting, and overturning frame guide rail 3 is motionless. At the same time as lifting and lowering, the overturning frame guide rail 3 and the overturning frame 5 pass through the T-shaped guide rail, and do not disengage when relative displacement occurs.

Referring to FIG. 4 , FIG. 4 is a general structural view of a general-purpose turning fixture. The linear drive part, the rotary drive part and the lifting part of the turning fixture are all installed on the guide rail. The guide rail is fixed and installed according to the internal space of the machine tool.

Combining Figures 1 to 4, the specific working process of this embodiment is: clamp the workpiece to the vacuum suction cup 6, lift it to a certain height through the screw elevator 9, and move the clamp to the first working point through the linear cylinder 19 (corresponding to The first piece of vacuum sucker mother sucker 13), the screw lifter 9 controls the fixture to descend as a whole until it touches the vacuum sucker mother sucker 13, the vacuum sucker mother sucker 13 fixes the vacuum sucker sucker 6, the machine tool processes the workpiece, the screw lifter 9 Control the overall rise of the fixture, the fixture is translated to the initial non-working position through the linear cylinder 19, the rotating cylinder 2 drives the flip frame 5 and the workpiece to flip 180°, and the fixture is translated to the second working point (corresponding to the second vacuum block) through the linear cylinder 19 Suction cup mother sucker 13), the screw lifter 9 controls the overall decline of the fixture until it contacts the vacuum sucker mother sucker 13, the vacuum sucker mother sucker 13 fixes the vacuum sucker sub-sucker 6, the machine tool processes the workpiece, and the screw lifter 9 controls the overall rise of the fixture, The fixture is translated to the initial non-working position by the linear cylinder 19, the rotating cylinder 2 drives the turning frame 5 and the workpiece to turn over 180°, the clamping bolt is loosened, and the vacuum suction cup 6 is removed to complete a processing flow.

Claims (2)

1. A flipping clamp for gas flooding, comprising a machine tool (17), a linear motion part, a flipping part, a lifting part and a clamping part, is characterized in that: The clamping part is composed of an electromagnetic lock (4) and a clamping bolt (7); The machine tool (17) is provided with a machine tool workbench (16), and the machine tool workbench is provided with a vacuum sucker mother sucker (13); The linear motion part is composed of the first linear cylinder (19), the end position limiter (18), the intermediate position limiter (20) and the rotary cylinder slide (21). The two ends of the first linear cylinder (19) pass through the components Fixed on the machine tool (17), the second guide rail is provided under the linear cylinder (19), the end position limiter (18) is provided on one side of the first linear cylinder (19), and the intermediate position limiter is provided at any other position (20), the rotary cylinder slide table (21) is located on the second guide rail, and can move back and forth above it, the first linear cylinder (19) is connected with the rotary cylinder slide table (21), and drives the rotary cylinder slide table (21) It can move back and forth on the second guide rail; the terminal limit device (18) and the intermediate limit device (20) play a role in limiting the movement of the rotary cylinder slide (21) in the linear direction, so that the rotary cylinder (2) in the first There are two working positions on the guide rail of the linear cylinder (19); the two working positions correspond to the positions of the two vacuum sucker female suckers (13) on the machine tool workbench (16); The turning part is composed of a hydraulic buffer (1), a rotating cylinder (2), a turning frame guide rail (3), a turning frame (5), a vacuum suction cup (6) and a fixed ring (8) that absorb the workpiece. The device (1) is located on both sides of the rotary cylinder (2), and the rotary cylinder (2) is adjusted through the hydraulic buffer (1), so that its stroke is continuously close to 180°; one side of the rotary cylinder (2) is connected by bolts and installed on the rotary On the cylinder slide table (21), the overturning frame guide rail (3) is fixed on the rotary cylinder (2) by bolts, and the rotary cylinder (2) drives the overturning frame guide rail (3) to rotate, and the overturning frame guide rail (3) and the overturning frame ( 5) It is fixed by the electromagnetic lock (4), so as to realize the 180° rotation of the entire turning part; when in use, the vacuum suction cup (6) that absorbs the workpiece is fixed to the turning frame (5) by the clamping bolt (7) ; The lifting part consists of a screw lift (9), a screw lift slide (10), a motor (11), a first guide rail (15) and a second linear cylinder, and the first guide rail (15) is fixed on the machine tool (17) , the screw lift slide table (10) is located on the first guide rail (15), and can move back and forth on it, the screw lift (9) is fixed on the screw lift slide table (10), and the screw lift (9) Connect the overturning frame guide rail (3) through the fixing ring (8), the motor (11) is fixed on the side of the slide table (10) of the rod lifter through the motor mounting flange (12), and the motor (11) is connected to the screw lifter (9) , used to drive the screw lifter (9) to lift, and the screw lifter (9) lifts the entire turning part through the fixing ring (8); when lifting, the electromagnetic lock (4) is energized and disconnected, and the turning frame guide rail (3) and Sliding is produced between the overturning frames (5) by the overturning frame guide rails; the first guide rail (15) is provided with a second linear cylinder, which is connected to the screw lift slide table (10), and the screw lift slide table ( 10) Driven by the second linear cylinder, it moves linearly on the first guide rail (15). 2. The overturning fixture for air flooding according to claim 1, characterized in that the rotary cylinder (2), electromagnetic lock (4), motor (11), first linear cylinder and second linear cylinder respectively pass data The communication interface is connected with a motion control system, and the motion control system is connected with a PC.