CN114346570A - Quick auto-change over device of welding jig positioning mechanism - Google Patents

Abstract

A welding fixture positioning mechanism fast switching device comprises a common base, wherein a switching mechanism and a pin penetrating mechanism are arranged on the common base, the switching mechanism is provided with a sliding table, the sliding table can linearly move relative to the common base, a positioning pin hole is formed in the sliding table, a positioning pin is arranged on the pin penetrating mechanism, the positioning pin extends out of the positioning hole and is transmitted into the positioning hole, and the position of the sliding table is locked; the sliding table is provided with two sets of welding part positioning and clamping mechanisms, the welding part positioning and clamping mechanisms can move linearly relative to the sliding table, the moving direction of the welding part positioning and clamping mechanisms is perpendicular to the moving direction of the sliding table, and the welding part positioning and clamping mechanisms realize positioning and clamping of products to be welded. The invention adopts a modular structure, realizes the switching of the welding positioning mechanisms of different products on the same clamp main body at one time, has simple operation and greatly improved working efficiency, and can effectively prevent errors by locking and interlocking the mechanisms. The invention also has the characteristics of high repeated positioning precision, reliable product quality and simple debugging work.

Description

A fast switching device for welding fixture positioning mechanism

technical field

The invention relates to a welding device, in particular to a fast switching device for a welding fixture positioning mechanism when similar products share a welding fixture, and belongs to the technical field of welding.

Background technique

Under the background of automobile platform and modular design, the design of parts of different models often uses the same main part, and then matches similar parts for combined welding; the output of each model is different, especially when the output is several times different, in On the premise of considering equipment cost and processing efficiency, it is cost-advantageous to share welding fixtures with small-quantity parts and large-quantity parts. However, the common fixture requires different positioning mechanisms due to different parts structures, which requires rapid switching of the positioning mechanism of the fixture. At present, the switching of the conventional welding fixture positioning mechanism needs to be completed manually, and the work efficiency is low. It takes about 30 minutes for each switching, which affects the production rhythm, and the repeat positioning accuracy is poor. After each switching is completed, it is necessary to teach and correct the welding track; If multiple sets of welding fixtures are used for welding, there is a problem of high cost of tooling and equipment.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the drawbacks of the prior art, and to provide a fast switching device for welding fixture positioning mechanism that can realize fast automatic switching of welding fixtures shared by similar products, thereby improving production efficiency.

The problem described in the present invention is realized by following technical scheme:

A quick switching device for welding fixture positioning mechanism, comprising a common base, a switching mechanism and a pin-through mechanism are arranged on the common base, the switching mechanism is provided with a sliding table, the sliding table can move linearly relative to the public base, and the sliding table is provided with a positioning mechanism The pin hole, the pin-through mechanism is provided with a positioning pin, the positioning pin protrudes and penetrates into the positioning hole, and the position of the sliding table is locked; there are two sets of welding parts positioning and clamping mechanisms on the sliding table, and the welding parts positioning and clamping mechanisms can be opposite to each other. The sliding table moves linearly, the moving direction of the welding piece positioning and clamping mechanism is perpendicular to the moving direction of the sliding table, and the welding piece positioning and clamping mechanism realizes the positioning and clamping of the product to be welded.

The welding fixture positioning mechanism quick switching device, the welding piece positioning and clamping mechanism is provided with a feeding cylinder, a support frame, a feeding slide rail, a product piece positioning unit and a product piece clamping unit, and the feeding cylinder and the feeding slide rail are fixed on the slide table, The bottom of the support frame is slidingly matched with the feeding slide rail, the piston rod of the feeding cylinder is connected to the support frame, the product part clamping unit and the product part positioning unit are arranged up and down on the support frame, and the clamping cylinder of the product part clamping unit is connected to the clamping body; The piece positioning unit is provided with two product piece positioning pins, and the product piece positioning pins are fixed with the support frame through the fixing block.

In the above-mentioned quick switching device for the welding fixture positioning mechanism, the switching mechanism is provided with a switching cylinder, the switching cylinder is fixed to the common base, the two switching slide rails are fixed on the common base, and the slide table and the switching slide rail are slidably matched.

The above-mentioned quick switching device for the positioning mechanism of the welding fixture, the pinning mechanism is provided with two sets, and each pinning mechanism includes a pinning cylinder, a connecting block, an adjustment block and a sliding table positioning pin. The pinning cylinder is connected to the common base through the cylinder seat, and the pinning cylinder The piston rod is fixedly connected to the connecting block, and the connecting block is connected with the positioning pins of the sliding table through two L-shaped adjusting blocks;

The above-mentioned quick switching device for the positioning mechanism of the welding fixture, the concave V limit blocks are respectively provided on both sides of each switching slide rail, and the convex V limit blocks are respectively provided on both sides of the slide table. The concave V limit blocks are matched and inserted, and the two convex V limit blocks located on the same side of the slide table are indexed by 90°.

The above-mentioned quick switching device for the positioning mechanism of the welding fixture, the positioning and clamping mechanism for the welding piece is also provided with a limit unit, and the limit unit includes two convex V limit blocks arranged on the lower part of the support frame and two concave V limit blocks arranged on the sliding table. Position block, two convex V limit blocks are indexed by 90°.

In the above-mentioned quick switching device for the positioning mechanism of the welding fixture, the common base is provided with upper and lower layers, and the middle of the common base is provided with a middle rectangular hole which is convenient for switching the movement of the cylinder piston rod.

The present invention is to design a set of positioning mechanism fast automatic switching device on the welding fixture, the device is controlled by PLC programming to quickly and automatically switch the welding parts positioning mechanism of two similar products, and solves the problem of the time-consuming manual replacement of the positioning mechanism in the prior art. A laborious problem. The present invention adopts a modular structure to realize the switching of welding positioning mechanisms of different products on the same fixture body at one time, the operation is simple, the work efficiency is greatly improved, and the mechanism locking and interlocking can effectively prevent errors. The invention also has the characteristics of high repeat positioning accuracy, reliable product quality and simple debugging work.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is the structural representation of the present invention;

Figure 2 is a schematic structural diagram of a welding piece positioning and clamping mechanism;

3 is a schematic structural diagram of a switching mechanism;

Fig. 4 is the structural representation of the concave V limit block;

Figure 5 is a schematic structural diagram of a pin-through mechanism;

FIG. 6 is a schematic view of the structure of the common base.

The symbols in the attached drawings are: 1. Common base; 1-1. Middle rectangular hole; 2. Welding parts positioning and clamping mechanism; 2-1. Feeding cylinder, 2-2. Supporting frame, 2-3. Feeding Slide rail, 2-4, clamping cylinder, 2-5, clamping body, 2-6, positioning pin for product parts; 2-7, fixing block; 3, switching mechanism; 3-1, sliding table, 3-2 , switching cylinder; 3-3, switching slide rail; 3-4, positioning pin hole; 4, pinning mechanism; 4-1, cylinder seat, 4-2, pinning cylinder; 4-3, connecting block; 4- 4. Adjustment block, 4-5, slide positioning pin, 5, concave V limit block; 6, convex V limit block.

Detailed ways

Referring to FIG. 1 , the present invention includes a common base 1 , a switching mechanism 3 and a pin-through mechanism 4 are arranged on the common base, and a welding piece positioning and clamping mechanism 2 is arranged on the sliding table of the switching mechanism. The function of the switching mechanism is to use the cylinder to quickly switch the position of the sliding table; the function of the pin-through mechanism is to reliably lock the two switching positions of the sliding table; the positioning and clamping mechanism of the welding parts is to locate and clamp the welding product parts.

Referring to FIG. 6 , the common base is provided with upper and lower layers, and the middle of the common base is provided with a middle rectangular hole 1-1 which is convenient for switching the movement of the cylinder piston rod.

Referring to Figure 1 and Figure 3, the switching mechanism is provided with a sliding table 3-1, a switching cylinder 3-2, and a switching slide rail 3-3. The switching cylinder is fixed to the common base, and the two switching slide rails are fixed on the upper layer of the common base. The sliding block slides and cooperates with the switching sliding rail, the switching cylinder moves, the sliding table moves linearly along the switching guide rail, and the sliding table is provided with positioning pin holes 3-4.

Referring to FIG. 1 and FIG. 5 , two sets of pin-piercing mechanisms 4 are provided, which are respectively used to lock the two switching positions of the sliding table. Each pin-piercing mechanism includes a cylinder seat 4-1, a pin-piercing cylinder 4-2, a connecting block 4-3, an adjusting block 4-4 and a sliding table positioning pin 4-5. The cylinder base is fixed to the lower layer of the common base, the pin-through cylinder is fixed on the cylinder base, the piston rod of the pin-through cylinder is fixed to the connecting block, and the connecting block is connected to the positioning pin of the sliding table through two L-shaped adjustment blocks connected by bolts. The relative position of the block L-shaped adjustment block can be adjusted. The pin-through cylinder adopts a cylinder with a pin, and the movement of the cylinder is more stable. The two switching positions of the sliding table are respectively inserted into the positioning pin holes by a sliding table positioning pin of a set of pin mechanism, which ensures the reliable positioning of the different switching positions of the sliding table. locking.

Referring to Fig. 1 and Fig. 2, two sets of welding parts positioning and clamping mechanisms are arranged side by side, which are respectively used for different welding parts. Each set of welding parts positioning and clamping mechanism is provided with a feeding cylinder 2-1, a support frame 2-2, a feeding sliding rail 2-3, a product part positioning unit and a product part clamping unit. The feeding cylinder and the feeding sliding rail are fixed on the sliding table, the bottom of the support frame is slidingly matched with the feeding sliding rail through the slider, and the piston rod of the feeding cylinder is connected to the supporting frame. The product part clamping unit and the product part positioning unit are arranged up and down and installed on the support frame. The clamping cylinder of the product part clamping unit is connected to the clamping body 2-5, and the clamping body is used to clamp the product part; the product part positioning unit There are two product part positioning pins 2-6, and the product part positioning pins are fixed with the support frame through the fixing blocks 2-7.

Referring to Figure 1, Figure 3, Figure 4, the present invention is also provided with a concave V-limiting block 5 and a convex V-limiting block 6 matched with it. middle. There are concave V limit blocks on both sides of each switching slide rail, and two convex V limit blocks are respectively provided on both sides of the slide table. In combination, the two convex V limit blocks located on the same side of the slide table are indexed by 90°, and the concave V limit blocks that cooperate with them are also indexed by 90° with each other. In the above limit structure, two sets of vertically crossed convex V limit blocks and concave V limit blocks cooperate with each other to guide and limit the position, and the positioning is stable and reliable, ensuring the accuracy and reliability of the sliding table switching position.

Referring to Figure 2, the welding part positioning and clamping mechanism is provided with a limit unit, the limit unit limits the movement of the support frame, and the limit unit adopts two concave V limit blocks 5 that are mutually indexed by 90°, and the two are mutually indexed. The 90° convex V limit block 6 performs motion limit.

Referring to FIG. 5 , the movement limit of the pin-piercing cylinder also uses two concave V limit blocks 5 and two convex V limit blocks 6 to limit the movement of the sliding table positioning pins.

The work control mechanism of the device of the present invention controls the coordinated action.

The working process of the device of the present invention is as follows: when the welding piece positioning and clamping mechanism 2 needs to be switched quickly, after the sensor arranged on the welding piece positioning and clamping mechanism detects that the welding piece is in place, the signal is transmitted to the PLC, After the PLC receives the signal, it outputs a reversing signal to the solenoid valve, and the solenoid valve controls the switching cylinder 3-2 on the switching mechanism 3 to the welding piece arranged on the sliding table 3-1 connected to it through the switching slide rail 3-3. The clamping mechanism 2 performs quick position switching, and cooperates with the convex V limit block 6 through the two groups of concave V limit blocks 5 on the side to limit the position. After the switch is in place, the cylinder in-position detection switch on the switching cylinder 3-2 will send back an in-position signal to the PLC. After the PLC receives the signal, it will output a reversing signal to the solenoid valve. The pin cylinder 4-2 drives the sliding table positioning pin 4-5 above it to penetrate into the positioning pin hole 3-4 on the sliding table 3-1, and adjusts the position of the welding piece clamping mechanism 2 arranged on the sliding table 3-1. To lock, the in-position detection switch on the pin-through cylinder 4-2 sends an in-position signal back to the PLC. After the PLC receives the signal, it outputs a reversing signal to the solenoid valve. The solenoid valve will control the positioning and clamping mechanism 2 of the corresponding side welding parts. The feeding cylinder 2-1 feeds the welding parts on the supporting frame 2-2 connected to it in place through the feeding slide rail 2-3, and passes through the two sets of concave V limit blocks 5 and convex V limit blocks 6 on this side. Fit the limit. The in-position detection switch on the feeding cylinder 2-1 sends an in-position signal back to the PLC. After the PLC receives the signal, it outputs a switching completion signal to the welding robot. After the robot receives the signal, it starts to weld the welding piece on the side. Repeat the above steps if you need to weld the other side of the weldment.

Claims (7)

1. The utility model provides a quick auto-change over device of welding jig positioning mechanism which characterized in that: the device comprises a public base, wherein a switching mechanism and a pin penetrating mechanism are arranged on the public base, the switching mechanism is provided with a sliding table, the sliding table can linearly move relative to the public base, a positioning pin hole is formed in the sliding table, a positioning pin is arranged on the pin penetrating mechanism, the positioning pin extends out of and penetrates into the positioning hole, and the position of the sliding table is locked; the sliding table is provided with two sets of welding part positioning and clamping mechanisms, the welding part positioning and clamping mechanisms can move linearly relative to the sliding table, the moving direction of the welding part positioning and clamping mechanisms is perpendicular to the moving direction of the sliding table, and the welding part positioning and clamping mechanisms realize positioning and clamping of products to be welded.

2. The welding jig positioning mechanism quick switching device of claim 1, characterized in that: the welding part positioning and clamping mechanism is provided with a feeding cylinder, a support frame, a feeding slide rail, a product part positioning unit and a product part clamping unit, the feeding cylinder and the feeding slide rail are fixed on the sliding table, the bottom of the support frame is in sliding fit with the feeding slide rail, a piston rod of the feeding cylinder is connected with the support frame, the product part clamping unit and the product part positioning unit are vertically arranged on the support frame, and a clamping cylinder of the product part clamping unit is connected with a clamping body; the product part positioning unit is provided with two product part positioning pins, and the product part positioning pins are fixed with the support frame through the fixing blocks.

3. The welding jig positioning mechanism quick switching device of claim 2, characterized in that: the switching mechanism is equipped with the switching cylinder, and it is fixed with public base to switch the cylinder, and two are switched the slide rail and fix on public base, slip table and switching slide rail sliding fit.

4. The welding jig positioning mechanism quick switching device of claim 3, characterized in that: the pin penetrating mechanisms are provided with two sets, each pin penetrating mechanism comprises a pin penetrating cylinder, a connecting block, an adjusting block and a sliding table positioning pin penetrating cylinder, the pin penetrating cylinders are connected with a common base through cylinder seats, piston rods of the pin penetrating cylinders are fixedly connected with the connecting blocks, and the connecting blocks are connected with the sliding table positioning pins through two L-shaped adjusting blocks; and the positioning pins of the two pin penetrating mechanisms are respectively locked at two switching positions of the sliding table.

5. The welding jig positioning mechanism quick switching device of claim 4, characterized in that: the both sides that each switched the slide rail are equipped with concave V stopper respectively, and the slip table both sides are equipped with protruding V stopper respectively, and the protruding V stopper of slip table spacing state matches with concave V stopper and inserts and close, is located two protruding V stoppers transposition 90 of slip table homonymy.

6. The welding jig positioning mechanism quick switching device of claim 5, characterized in that: a welding piece positioning and clamping mechanism still is equipped with spacing unit, and spacing unit is 90 including setting up two protruding V stoppers in the support frame lower part and setting up two concave V stoppers on the slip table, two protruding V stoppers transposition.

7. The welding jig positioning mechanism quick switching device of claim 6, characterized in that: the public base is provided with an upper layer and a lower layer, and the middle part of the public base is provided with a middle rectangular hole which is convenient for switching the motion of the piston rod of the cylinder.

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