Flexible Quick-Change Fixture Base

Abstract

A flexible quick-change fixture base is used in the field of mechanical manufacturing and welding. The cylinder body of the floating mechanism's lifting cylinder is fixed on the fixture base. During operation, the floating mechanism is pushed up to the upper limit by the lower lifting cylinder. When welding, the lifting cylinder deflates, and the fixture body is pressed down by gravity to compress the spring until it contacts the lower electrode of the welding torch. After the fixture body is stable, welding starts. The flipping mechanism is connected to the floating mechanism through a bearing seat and floats up and down with the floating mechanism; the flipping cylinder of the flipping mechanism is connected to the left flipping shaft, and the action of the flipping cylinder drives the fixture mounting plate on the flipping shaft to flip; the quick positioning device is quickly positioned by two V-shaped blocks, and the positioning holes on both sides are accurately positioned through positioning pins. This utility model can achieve the up-and-down floating, flipping angle, quick positioning of the fixture body, and automatic compensation for electrode wear through the floating mechanism, flipping mechanism, and quick positioning device, and can cooperate with a three-axis linear automatic welding machine to achieve flexible welding, reducing the production input cost and enhancing the universality of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical manufacturing welding, in particular to a flexible quick-change fixture base for manufacturing automobile parts. Background Art

[0002] Currently, in the machinery manufacturing industry, such as automotive parts, the combined welding fixture base only serves as a fixed fixture. It has a simple structure, no movable mechanism, cannot compensate for electrode wear, and the angle cannot be changed. If you want to achieve automatic welding of all welds on this fixture base, you must invest in a six-axis spot welding robot, which has high production costs. Summary of the Invention

[0003] In order to overcome the lack of flexibility of the existing fixture base, the purpose of the present invention is to provide a flexible quick-change fixture base, which can realize the up and down floating, flipping and rapid positioning of the fixture base.

[0004] To achieve the above-mentioned purpose of the invention, the present invention includes a floating mechanism, a flipping mechanism, and a quick positioning device; the cylinder body of the lifting cylinder of the floating mechanism is fixed on the clamp base, and when the floating mechanism is working, the lifting cylinder below pushes the floating mechanism to the upper limit. During welding, the lifting cylinder is deflated, and the clamp body is pressed down by gravity to compress the spring until it contacts the lower electrode of the welding gun. After the clamp body is stable, welding begins, and the flipping mechanism is connected to the floating mechanism through the bearing seat and floats up and down with the floating mechanism; the flipping cylinder of the flipping mechanism is connected to the left flipping shaft, and the action of the flipping cylinder drives the clamp mounting plate on the flipping shaft to flip; the quick positioning device is quickly positioned by two V-blocks fixed to the mounting plate, and the positioning holes on both sides are accurately positioned by positioning pins.

[0005] The cylinder body of the lifting cylinder of the floating mechanism is fixed in the middle position below the mounting plate at the lower end of the clamp base. The upper end of the piston rod is connected to one end of the square tube on the left and right sides of the connecting plate through the two ends of the connecting plate. The lower connecting plate located above the other end of the square tube is connected to the steps at the lower ends of the two guide pillars respectively. The four guide rods and guide sleeves on the left and right sides of the square tube slide together to ensure that the floating device floats smoothly up and down. The four springs are respectively installed on the four guide pillars, located between the upper end connecting plate and the middle connecting plate of the guide pillars. The middle connecting plates on the left and right sides are fixed to the upper end of the clamp base, and the front and back of the middle connecting plate are respectively fixed to the upper end of the guide sleeve.

[0006] The cylinder block of the tipping cylinder of the tipping mechanism is installed on the left side of the fixture base. The piston rod is connected to the left tipping shaft. The tipping shafts on both the left and right sides of the fixture base are assembled with bearing seats. The bearing seats are connected to the upper connecting plate of the floating mechanism. The inner sides of the tipping shafts on both the left and right sides are connected to fixture mounting plates. The fixture body is installed on the fixture mounting plates on both the left and right sides. Limit plates are welded on the tipping shafts on both the left and right sides. The contact buffer is fixed on the tipping mechanism. When the tipping cylinder operates, it drives the tipping shaft to tip. The tipping shaft drives the fixture body to tip 90 degrees through the fixture mounting plate. The 90-degree tipping angle of the tipping mechanism is restricted by the limit plate, and the tipping action of the tipping mechanism is made stable by the contact buffer.

[0007] The two V-shaped blocks of the quick positioning device are fixed on the front side of the mounting plate, and the positioning pins are fixed in the positioning holes on both sides of the mounting plate.

[0008] Rollers are installed at the bottom of the fixture base.

[0009] Compared with the prior art, the present invention can, through the floating mechanism, tipping mechanism and quick positioning device, achieve the up-and-down floating of the fixture body, tipping angle, quick positioning and automatic compensation of electrode wear amount, and can cooperate with a three-axis linear automatic welding machine to achieve flexible welding, reduce the production input cost and enhance the universality of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is the front view of the present invention.

[0011] Figure 2 is the rear view of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0012] As Figure 1 , Figure 2 shown, the fixture base 19 of the present invention mainly includes a floating mechanism, a tipping mechanism and a quick positioning device.

[0013] The cylinder block of the lifting cylinder 5 of the floating mechanism is fixed at the middle position below the lower end of the fixture base 19 and below the mounting plate 16. The upper end of the piston rod is respectively connected to one end of the square tubes 3 on the left and right sides of the connecting plate 17 through the two ends of the connecting plate 17. The lower connecting plate 4 located above the other end of the square tube 3 is respectively connected to the steps at the lower ends of the two guide posts 1. The four guide rods 1 on the left and right sides of the square tube 3 are in sliding fit with the guide sleeves 6 to ensure the smooth up and down floating of the floating device. The four springs 7 are respectively installed on the four guide posts 1, between the upper connecting plate 11 and the middle connecting plate 18 of the guide post 1. The middle connecting plates 18 on the left and right sides are fixed to the upper end of the fixture base 19. The front and back of the middle connecting plate 18 are respectively fixed to the upper ends of the guide sleeves 6. When the floating mechanism works, the lifting cylinder 5 below pushes the floating mechanism to rise to the upper limit. When welding, the lifting cylinder 5 deflates, and the fixture body is pressed down by gravity to compress the spring 7 until it contacts the lower electrode of the welding torch. After the fixture body is stable, welding starts. The flipping mechanism is connected to the floating mechanism through the bearing block 10 and floats up and down with the floating mechanism.

[0014] The cylinder block of the flipping cylinder 8 of the flipping mechanism is installed on the left side of the fixture base 19. The piston rod is connected to the left flipping shaft 9. The flipping shafts 9 on the left and right sides of the fixture base 19 are assembled with the bearing blocks 10. The bearing blocks 10 are connected to the upper connecting plate 11 of the floating mechanism. The inner sides of the flipping shafts 9 on the left and right sides are both connected to the fixture mounting plates 2. The fixture body is installed on the fixture mounting plates 2 on the left and right sides. Limit plates 12 are welded on the flipping shafts 9 on the left and right sides, which can ensure that the flipping angle of the fixture body is 90 degrees each time. The contact buffer 13 is fixed on the flipping mechanism and can play a buffering role when the flipping action is in place. When the flipping mechanism works, the flipping cylinder 8 acts to drive the flipping shaft 9 to flip. The flipping shaft 9 drives the fixture body to flip 90 degrees through the fixture mounting plate 2. The 90-degree flipping angle of the flipping mechanism is limited by the limit plate 12, and the flipping action of the flipping mechanism is made stable through the contact buffer 13.

[0015] The quick positioning device is located at the fixed part below the fixture base 19 and plays a role in quick positioning. The two V-shaped blocks 14 of the quick positioning device are fixed on the front side of the mounting plate 16. The positioning pins 15 are fixed in the positioning holes on both sides of the mounting plate 16. The quick positioning device is quickly positioned by the two V-shaped blocks 14 fixed on the mounting plate 16, and the positioning holes on both sides are accurately positioned by the positioning pins 15.

[0016] Rollers 20 are installed at the bottom of the fixture base 19 to facilitate the movement of the fixture body base 19.

Claims

1. A flexible quick-change fixture base, characterized by: The fixture base (19) includes a floating mechanism, a flipping mechanism, and a quick positioning device; the cylinder body of the lifting cylinder (5) of the floating mechanism is fixed on the fixture base (19); when the floating mechanism is working, the lifting cylinder (5) below pushes the floating mechanism to rise to the upper limit; during welding, the lifting cylinder (5) is deflated, and the clamp body is pressed down by gravity to compress the spring (7) until it contacts the lower electrode of the welding gun; after the clamp body is stable, welding begins; the flipping mechanism is connected to the floating mechanism through the bearing seat (10) and floats up and down with the floating mechanism; the flipping cylinder (8) of the flipping mechanism is connected to the left flipping shaft (9), and the action of the flipping cylinder (8) drives the fixture mounting plate (2) on the flipping shaft (9) to flip; the quick positioning device is quickly positioned by two V-shaped blocks (14) fixed on the mounting plate (16), and the positioning holes on both sides are accurately positioned by positioning pins (15); The cylinder body of the lifting cylinder (5) of the floating mechanism is fixed to the middle position below the lower end mounting plate (16) of the clamp base (19), and the upper end of the piston rod is connected to one end of the square tube (3) on the left and right sides of the connecting plate (17) through the two ends of the connecting plate (17), and the lower end connecting plate (4) located above the other end of the square tube (3) is connected to the steps at the lower ends of the two guide pillars (1). The four guide pillars (1) on the left and right sides of the square tube (3) are slidably matched with the guide sleeve (6) to ensure that the floating device floats smoothly up and down. The four springs (7) are respectively installed on the four guide pillars (1) and are located between the upper end connecting plate (11) of the guide pillar (1) and the middle connecting plate (18). The middle connecting plates (18) on the left and right sides are fixed to the upper end of the clamp base (19), and the front and rear of the middle connecting plate (18) are respectively fixed to the upper end of the guide sleeve (6); The cylinder body of the flip cylinder (8) of the flip mechanism is installed on the left side of the clamp base (19), the piston rod is connected to the left flip shaft (9), the flip shafts (9) on the left and right sides of the clamp base (19) are assembled with the bearing seat (10), the bearing seat (10) is connected to the upper end connecting plate (11) of the floating mechanism, the inner sides of the flip shafts (9) on the left and right sides are connected to the clamp mounting plate (2), the clamp body is installed on the clamp mounting plates (2) on the left and right sides, and the flip shafts (9) on the left and right sides are welded with limiting plates (12), and the contact buffer (13) is fixed on the flip mechanism; the flip cylinder (8) drives the flip shaft (9) to flip, and the flip shaft (9) drives the clamp to flip 90 degrees through the clamp mounting plate (2), the limiting plate (12) limits the 90-degree flip angle of the flip mechanism, and the contact buffer (13) makes the flipping action of the flip mechanism smooth; The two V-shaped blocks (14) of the quick positioning device are fixed to the front side of the mounting plate (16), and the positioning pins (15) are fixed in the positioning holes on both sides of the mounting plate (16); A roller (20) is mounted on the bottom of the fixture base (19).

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