CN201073735Y - Gripping device for processing crystallizer brass tube - Google Patents

Abstract

The utility model relates to a fixture used for processing the copper tube of the crystallizer, belonging to the workpiece fixture and positioning device of the machine tool, in particular to the workpiece fixture arranged on the worktable, which comprises a bottom plate and a limit plate fixed on the worktable and is characterized in that the bottom plate is close to the limit plate; a top board and a positioning mechanism connected with the positioning pin and the positioning roller are arranged on the central line of the bottom plate; a clamping mechanism connected with the clamping plates, the screw mandrel and the supporting seat is symmetrically arranged on both sides of the central line on the bottom plate. When machining, the copper tube is fixed and located by the positioning mechanism, the clamping mechanism and the top board. The utility model has the advantages that the fixture can solve the insoluble problem of unstable quality when machining the copper tube; meet the technological requirements with stable quality and high rate of finished products; avoid the score and calibration process on the machine tool, realize the process of loading two tubes, can shorten the processing cycle, enhance production efficiency and reduce greatly labor intensity with convenient, flexible operation and extensive applicability; thus the fixture can be used on the milling machine, the boring machine or other machine tools.

Description

Fixtures for Processing Mold Copper Tubes

technical field

The utility model belongs to a workpiece clamping and positioning device of a machine tool, in particular to a workpiece clamping device arranged on a workbench.

Background technique

Mold copper tube is an important part of continuous casting machine. The upper and lower end faces of the mold copper tube are the installation reference planes of the copper tube in the mold, and its machining accuracy directly affects the performance of the continuous casting machine. The shape of the crystallizer copper tube is complex, the cross section is square, and the length direction is arc-shaped. It is difficult to accurately determine the position of the upper and lower ends relative to the arc shape, which brings great difficulties to ensure the processing accuracy. In many years of production practice, it has been It was not well resolved.

The processing methods commonly used at present: one is to use manual marking to determine the position of the upper and lower ends, and to perform installation and correction according to the line during machine tool processing. Its defect is that marking, machine tool installation and correction, clamping and processing will produce errors. Especially when scribing, due to the special shape of the copper tube, it is difficult to determine the datum of scribing in the arc direction, the scribing error is large, resulting in a large accumulation error, which directly affects the processing accuracy of the end face, and the product quality is unstable; Each process is completely manual operation, which has high labor intensity, long processing cycle and low production efficiency. Another method is to use a simple device consisting of a mandrel and a support rod to brace the copper tube from the inner cavity of the copper tube, and use the front and rear thimbles of the lathe to withstand the center holes at both ends of the mandrel for clamping processing. The problem with this method is that the processing accuracy is still guaranteed by scribing. In addition, the reliability of this clamping method is not good, it is easy to loosen during processing, the labor intensity is high, the processing cycle is long, the production efficiency is low, and the product quality is not good. Stablize.

Contents of the invention

In order to overcome the deficiencies of the existing technology, the purpose of this utility model is to provide a clamp for processing the copper tube of the crystallizer, which is used for processing the upper and lower end faces of the copper tube of the crystallizer, and can be installed and positioned conveniently, flexibly and accurately during processing to solve the problem of Unstable processing accuracy of copper tubes can improve the qualified rate of products; simplify the process and improve processing efficiency; reduce labor intensity.

Fixtures for processing crystallizer copper tubes, including the bottom plate and the limit plate fixed on the machine tool table, the bottom plate is close to the limit plate, and the limit plate is positioned by the limit plate when the bottom plate is assembled; the center line of the bottom plate is connected by positioning pins and positioning rollers The positioning mechanism and the upper pressure plate, the positioning mechanism is the benchmark for clamping the copper tube during processing, and the upper pressure plate presses the copper tube; the clamping mechanism connected by the splint, the screw rod and the support is arranged symmetrically on both sides of the center line of the bottom plate, clamping from the side Tighten and fix the copper tube so that the copper tube to be processed is firmly clamped in the fixture.

The utility model further improves:

The bottom plate is the base plate of the fixture of the present utility model. A vertical plate perpendicular to the bottom surface is arranged on the center line of the bottom plate. Positioning pin holes, square holes for placing positioning rollers and screw holes for fixing the upper pressure plate are set on the vertical plate. The screw holes for fixing the support and the waist-shaped grooves for fixing the bottom plate are arranged symmetrically, and the bottom plate is fixed on the workbench by the bottom plate fixing bolts.

The locating pin of the locating mechanism is fixed in the locating pin hole of the vertical plate, and the locating roller is sleeved on the locating pin and placed in the hole, and the axis of the locating roller is perpendicular to the bottom surface.

The back of the splint of the clamping mechanism is provided with a spherical socket, which cooperates with the screw rod to realize universal connection; the upper part of the support is provided with an internal thread through hole, which is threaded with the screw rod, and the lower part is provided with a through hole, and the support is fixed on the bottom plate by bolts , with the cooperation of the screw rod and the splint, the copper tube is squeezed to the middle to realize the precise positioning of the copper tube.

The upper pressing plate is provided with a through hole, fixed on the vertical plate by bolts, and cooperates with the bottom plate to compress the copper pipe from above.

The limiting plate is provided with a through hole, and is fixed on the workbench by the fixing bolt of the limiting plate, which is used as the installation and positioning reference of the bottom plate to ensure accurate positioning of the bottom plate.

Before use, first assemble the positioning roller, positioning pin, screw mandrel, and support on the base plate, and then install the base plate and the limiting plate on the machine tool workbench. The base plate is close to the limiting plate and fixed with bolts. When in use, put the arc surface of the copper tube towards the positioning roller, install a splint on the head of the screw, tighten the screw to push the copper tube to the positioning roller, and gently clamp the copper tube to achieve precise positioning of the copper tube; The pressure plate is connected with the vertical plate by bolts, and the copper pipe is pressed from the upper part, so that the copper pipe is fixed firmly. Start the machine tool to process one end face of the copper pipe. After the processing is finished, loosen the fixing bolts of the bottom plate and the workbench, turn around and install the fixture together with the copper pipe, and process the other end face in the same way to complete the processing of the copper pipe.

Compared with the prior art, the advantages are;

1. Solve the problem of unstable copper tube processing quality that has been difficult to solve for a long time; the processed copper tube meets the process requirements, with stable quality and high yield.

2. Eliminate marking and correcting procedures on the machine tool, realize double-pipe clamping and one-time processing, shorten the processing cycle, and increase production efficiency.

3. It is convenient and flexible to use, and the labor intensity is greatly reduced.

4. Wide applicability, it can be used not only on milling machines but also on boring machines or other machine tools.

Description of drawings

Below with reference to accompanying drawing, the utility model is further described.

Fig. 1 is a schematic diagram of the fixture structure for processing copper tubes of crystallizers.

Fig. 2 is a cross-sectional view along line A-A of Fig. 1 .

Figure 3 is a schematic diagram of the bottom plate of Figure 1

Fig. 4 is an enlarged view of part B of Fig. 1 .

Detailed ways

Fig. 1, Fig. 2, Fig. 3, Fig. 4 can be seen, the clamp used for processing crystallizer copper tube, the bottom plate 1 and the limit plate 8 are fixed on the workbench 17, the bottom plate 1 is close to the limit plate 8; the positioning roller of the positioning mechanism 5 is set on the positioning pin 6, and the positioning pin 6 is fixed on the vertical plate 15; the splint 4 of the clamping mechanism is connected with the support 2 by the screw rod 3, and the support 2 is fixed on the bottom plate 1 by the support fixing bolt; the upper pressing plate 7 is fixed on the riser 15 by bolts.

It can be further seen from the accompanying drawings that the bottom plate 1 is rectangular, and a plate 15 is set up along the center. The vertical plate 15 is provided with 2 fixed positioning pin holes 11, 2 square holes for placing positioning rollers, and 2 fixed upper platen screw holes 12. There are 4 sets of 16 screw holes 13 for fixing the support and 4 waist holes 14 for fixing the bottom plate symmetrically arranged on both sides of the longitudinal and transverse center line of the bottom plate 1. Two positioning pins 6 are fixed on the vertical plate 15, and the positioning roller 5 is set Place the positioning pin 6 in the square hole where the positioning roller 5 is placed to form a positioning mechanism. The axes of the two positioning rollers 5 are perpendicular to the plane of the bottom plate 1 to ensure accurate clamping dimensions. The support 2 is provided with a threaded through hole, and the back of the splint 4 is provided with a spherical socket, which is connected to the support 2 by the screw 3 to form a clamping mechanism; adjusting the screw 3 can make the splint 4 push the copper tube 16 to the positioning roller 5, And press gently to realize the precise positioning of the copper tube; the bottom plate 1 is tightly fixed on the workbench 17 by 4 waist-shaped holes 14 for fixing the bottom plate and the bottom plate fixing bolts 10 . When base plate 1 is installed, limit plate 8 plays a positioning role, and limit plate is fixed on the workbench 17 by 4 limit plate fixing bolts 9 . 2 upper pressing plates 7 are connected with the vertical plate 15 by bolts to compress the copper pipe 16.

When processing copper pipes, first fix the limit plate 8 on the machine tool workbench 17 with the limit plate fixing bolt 9, and use a dial indicator to strictly correct its reference edge during the fixation process so that it is parallel to the machine tool spindle. Base plate 1 is placed on machine tool workbench 17 again, make the side of base plate 1 close to the positioning reference edge of limit plate 8, base plate is fixed with base plate fixing bolt 10. Install the copper pipe 16 so that the arc surface of the copper pipe faces the positioning roller 5, clamp the copper pipe 16 by the screw mandrel 3 and the splint 4, and then use the upper pressing plate 7 to fix the copper pipe 16, so that the copper pipe 16 can be obtained in the clamp Accurate positioning is achieved; when the arc surface of the copper tube 16 leans against the two positioning rollers 5, the symmetrical central plane of the copper tube 16 is the symmetrical central plane of the two positioning rollers 5, so that all geometric elements of the copper tube 16 are Accurate positioning has been obtained on the fixture, and the positions of the upper and lower end faces of the copper pipe 16 have also been accurately determined. As long as the dimensional distance from the processing surface of the copper tube to the symmetric center plane of the fixture is controlled, the dimensional accuracy and parallelism from the upper and lower ends of the copper tube to the center plane can be strictly guaranteed. Copper pipe 16 just can start to process after clamping firmly. After processing one end face, loosen the fixing bolts of the base plate 1 and the workbench 17, turn the clamp together with the copper pipe 16, and process the other end face in the same way, thus completing the processing of the copper pipe 16.

Claims (6)

1. The fixture for processing crystallizer copper pipes is characterized in that it includes a base plate (1) and a limiting plate (8) fixed on the machine tool table (17), and the base plate (1) is close to the limiting plate (8); the base plate (1) The positioning mechanism and the upper platen (7) connected by the positioning pin (6) and the positioning roller (5) are arranged on the center line; the two sides of the center line of the bottom plate (1) are symmetrically arranged by the splint (4), the screw rod (3) ) is a clamping mechanism connected to the support (2). 2. The fixture for processing crystallizer copper tubes according to claim 1, characterized in that a vertical plate (15) perpendicular to the bottom surface is set on the center line of the bottom plate (1), and a positioning pin hole is set in the vertical plate (15) and the square hole for placing the positioning roller (5) and the screw hole (12) for fixing the upper platen; the screw holes (13) for the fixed support (2) and the waist-shaped hole ( 14), the base plate (1) is fixed on the workbench (15) by the base plate fixing bolts (10). 3. The clamp for processing crystallizer copper pipe according to claim 1, wherein the positioning pin (6) of the positioning mechanism is fixed in the positioning pin hole (11) of the vertical plate (15), and the positioning roller (5 ) is set on the positioning pin (6), and the axes of the 2 positioning rollers (5) are perpendicular to the plane of the base plate (1). 4. The fixture for processing crystallizer copper tube according to claim 1, characterized in that the splint (4) of the clamping mechanism is provided with a spherical socket on its back side, which cooperates with the screw mandrel (3) and is universally connected; the support (2) The upper part is provided with an internal thread through hole to cooperate with the screw mandrel (2), and the lower part of the support (2) is provided with a through hole, and is fixed on the base plate (1) by the support fixing bolts. 5. The fixture for processing crystallizer copper tubes according to claim 1, characterized in that the upper platen (7) is provided with a through hole, and is fixed on the vertical plate (15) by bolts. 6. The fixture for processing crystallizer copper tube according to claim 1, characterized in that said limiting plate (8) establishes a through hole, and is fixed on the workbench (17) by a limiting plate fixing bolt (9), against the base plate (1).

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