Jig for welding pipe

Abstract

The utility model discloses a jig for pipe welding. The jig comprises a base, a first mounting part, a second mounting part, a positioning assembly, a pressing rod and a linear motion mechanism. When the pipes are welded, two straight pipes are placed in the two groups of placing ports, and a connected connecting section is welded and fixed between the two straight pipes; the bent pipe is placed on the supporting part, and the rear position of the bent pipe abuts against the interiors of the notches of the two check blocks; the pressing rod is switched to press the rear position of the bent pipe to fix the bent pipe; and the two straight pipes are moved forwards, so that the two straight pipes are in contact with the bent pipe. Compared with the prior art, the device has the beneficial effects that the structure is simple, the straight pipe and the bent pipe are stably placed, the device can be better matched with a welding robot, the welding operation is simpler and faster, and the welding efficiency is improved.

Description

Technical Field

[0001] The utility model relates to pipe welding, and particularly to a fixture for pipe welding. Background Art

[0002] Pipe welding is a common form of metal structure. For example, the handrails on some equipment are generally welded by straight pipes and bent pipes. During the welding process, since the straight pipe is relatively high, if the straight pipe is set vertically, the welding position will be relatively high. Therefore, the straight pipe is generally placed horizontally. To match the horizontally placed straight pipe, the bottom of the bent pipe is an arc section, that is, it is inconvenient to place and fix the bent pipe. The current solution generally relies on fixtures such as bench vises to clamp and fix the bent pipe. The problems still existing in clamping and fixing the bent pipe by using a fixture are: the operation is relatively cumbersome and it is not convenient to cooperate with the welding robot. Summary of the Utility Model

[0003] This application provides a fixture for pipe welding, which can solve the problems raised in the background art.

[0004] In this application, a fixture for pipe welding is provided, including:

[0005] A base;

[0006] A first mounting part, the bottom of which is fixedly connected to the rear position of the base; on the vertical surface at the front side, there are two groups of upper and lower placement openings for the horizontal straight pipe to be placed by moving back and forth;

[0007] A second mounting part, the bottom of which is fixedly connected to the left position of the base;

[0008] A positioning assembly for placing the bent pipe, including: a supporting part for supporting the bottom of the bent pipe, and two stoppers for limiting the rear position of the bent pipe; the supporting part is fixedly connected to the second mounting part or the base; the two stoppers are fixedly connected to the left side position of the first mounting part one above the other;

[0009] A horizontal pressure bar, which is slidably connected to the second mounting part along its own axis, corresponding to the position between the two stoppers;

[0010] A linear motion mechanism, which acts on the pressure bar to enable the pressure bar to switch between pressing and releasing the rear position of the bent pipe.

[0011] Further, the linear motion mechanism is a crank-slider mechanism.

[0012] Further, when the pressure bar presses the rear position of the bent pipe, the first hinge point between the crank and the second mounting part, the second hinge point between the connecting rod and the crank, and the third hinge point between the connecting rod and the pressure bar are all on the axis of the pressure bar.

[0013] Furthermore, the supporting part can be adjusted vertically.

[0014] Furthermore, the supporting part is fixedly connected to the second mounting part; a threaded rod for adjusting the position is provided between the supporting part and the base.

[0015] Furthermore, in each group of placement openings, the leftmost placement opening is detachably connected with a bolt that can limit the front-back sliding of the straight pipe.

[0016] In summary, in this application, a jig for welding pipes includes a base, a first mounting part, a second mounting part, a positioning component, a pressure rod, and a linear motion mechanism. When welding pipes, two straight pipes are placed in two groups of placement openings, and a connected section is first welded and fixed between the two straight pipes; the bent pipe is placed on the supporting part, and the rear position of the bent pipe is abutted against the notches of the two stoppers; the pressure rod is switched to press the rear position of the bent pipe to fix the bent pipe; the two straight pipes are moved forward so that the two straight pipes contact the bent pipe. The beneficial effects are as follows: the structure is simple, the straight pipes and the bent pipe are stably placed, and it can better cooperate with the welding robot, making the welding operation simpler and faster and improving the welding efficiency. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background art, the drawings required for use in the embodiments of the present application or the background art will be described below.

[0018] Figure 1 It is a schematic diagram of the present application;

[0019] Figure 2 It is Figure 1 an enlarged schematic diagram of part A in

[0020] Figure 3 It is a schematic diagram of the present application after setting the bolt;

[0021] Figure 4 It is a schematic diagram of the present application after the supporting part can be adjusted in position;

[0022] Figure 5 It is Figure 4 an enlarged schematic diagram of part B in

[0023] In the figure,

[0024] 1. Base; 1a. Sleeve;

[0025] 2. First mounting part; 2a. Placement opening; 2a1. Bolt;

[0026] 3. Second mounting part; 3a. Mounting block;

[0027] 4. Positioning component; 4a. Support part; 4a1. Connection part; 4a2. Support part; 4a3. T-shaped groove; 4b. Stopper

[0028] 5. Press bar

[0029] 6. Linear motion mechanism; 6a. Crank; 6b. Connecting rod

[0030] 7. Straight pipe; 7a. Connection section

[0031] 8. Bent pipe

[0032] 9. Threaded rod Detailed implementation manners

[0033] The following further explanations are made in conjunction with the accompanying drawings. Unless otherwise defined, the technical terms or scientific terms used in this disclosure should have the ordinary meaning understood by those with ordinary skills in the field to which this disclosure belongs. The "first", "second" and similar terms used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to represent relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0034] Please refer to Figure 1 , a fixture for pipe welding, comprising a base 1, a first mounting portion 2, a second mounting portion 3, a positioning component 4, a press bar 5 and a linear motion mechanism 6.

[0035] The bottom of the first mounting portion 2 is fixedly connected to the rear position of the base 1. On the vertical surface at the front side of the first mounting portion 2, there are two sets of placement openings 2a, one above the other, and each set of placement openings 2a is correspondingly used for placing a horizontal straight pipe 7 to move back and forth. More specifically, the placement opening 2a is concave, the concave opening faces the front side, and the width of the concave opening is equal to the outer diameter of the straight pipe 7. In the accompanying drawings, the number of a set of placement openings 2a is three, and the first mounting portion 2 can be multiple, and each first mounting portion 2 is provided with two placement openings 2a, one above the other.

[0036] The bottom of the second mounting portion 3 is fixedly connected to the left position of the base 1.

[0037] The positioning component 4 is used for placing the bent pipe 8, and includes a support part 4a that supports the bottom of the bent pipe 8 and two stoppers 4b that limit the rear position of the bent pipe 8.

[0038] The supporting part 4a is fixedly connected to the second mounting part 3 or the base 1. More specifically, the supporting part 4a can be fixedly connected to the second mounting part 3, including a connecting part 4a1 for fixedly connecting to the second mounting part 3 and a concave supporting part 4a2.

[0039] Two stoppers 4b are fixedly connected to the left side position of the first mounting part 2 one above the other. Considering the above-mentioned "the first mounting part 2 can be multiple", then the two stoppers 4b are fixedly connected to the leftmost first mounting part 2. More specifically, the two placing openings 2a on the leftmost side can be between the two stoppers 4b.

[0040] The pressing rod 5 is horizontal and is slidably connected to the second mounting part 3 along its own axis. More specifically, a mounting block 3a can be fixedly connected to the second mounting part 3, and a through hole for the pressing rod 5 to be slidably connected is provided on one side of the mounting block 3a close to the stopper 4b, that is, the through hole and the pressing rod 5 can be in a transition fit. Design the height position of the mounting block 3a on the second mounting part 3 so that the pressing rod 5 corresponds to the position between the two stoppers 4b.

[0041] The linear motion mechanism 6 acts on the pressing rod 5 to drive the pressing rod 5 to slide, so that the pressing rod 5 can switch between pressing and releasing the rear position of the bent pipe 8. For example, a lead screw module can be used as the linear motion mechanism 6.

[0042] Please refer to Figure 2 , in some embodiments, the linear motion mechanism 6 can also be a crank-slider mechanism. More specifically, the pressing rod 5 serves as the slider of the crank-slider mechanism, the crank 6a is hinged to one side of the mounting block 3a away from the stopper 4b, and both ends of the connecting rod 6b are respectively hinged to the crank 6a and the pressing rod 5.

[0043] Furthermore, when the pressing rod 5 presses the rear position of the bent pipe 8, the first hinge point of the crank 6a and the second mounting part 3, the second hinge point of the connecting rod 6b and the crank 6a, and the third hinge point of the connecting rod 6b and the pressing rod 5 are all on the axis of the pressing rod 5.

[0044] When welding the pipes, place two straight pipes 7 in two groups of placing openings 2a, and a connected connecting section 7a is first welded and fixed between the two straight pipes 7; place the bent pipe 8 on the supporting part 4a, and make the rear position of the bent pipe 8 abut against the concave openings of the two stoppers 4b; switch the pressing rod 5 to press the rear position of the bent pipe 8 to fix the bent pipe 8; move the two straight pipes 7 forward so that the two straight pipes 7 contact the bent pipe 8.

[0045] Please refer to Figure 4 and Figure 5 , in some embodiments, the supporting part 4a can be adjusted up and down in position. In this way, it can adapt to bent pipes 8 of different heights.

[0046] Further, in combination with the above "the support part 4a can be fixedly connected to the second mounting part 3", a threaded rod 9 for adjusting the position is provided between the support part 4a and the base 1. More specifically, a linear guide for connecting the support part 4a is provided on the second mounting part 3. A T-shaped groove 4a3 is provided at the bottom of the support part 4a. The top end of the threaded rod 9 is in a stepped shape matching the T-shaped groove 4a3. A sleeve 1a with internal threads is fixedly connected to the base 1, and the threaded rod 9 is threadedly connected to the sleeve 1a.

[0047] Please refer to Figure 3 , in some embodiments, in each set of placement openings 2a, the leftmost placement opening 2a is detachably connected with a bolt 2a1 that can limit the front-back sliding of the straight pipe 7. Specifically, jack holes are provided on these two placement openings 2a, and a stopper 4b is provided at the top end of the bolt 2a1. By blocking the straight pipe 7 with the bolt 2a1, the front-back sliding of the straight pipe 7 is restricted, making the welding of the straight pipe 7 and the bent pipe 8 more stable.

Claims

1. A fixture for tube welding, characterized in that, Comprising: Base (1); The first mounting portion (2), fixedly connected to the rear position of the base (1) at the bottom; On the vertical surface at the front side, there are two sets of placement openings (2a) arranged one above the other for the horizontal straight pipe (7) to be placed by moving back and forth; The second mounting portion (3), fixedly connected to the left position of the base (1) at the bottom; A positioning assembly (4) for placing the bent pipe (8), comprising: a support portion (4a) for supporting the bottom of the bent pipe (8), and two stoppers (4b) for limiting the rear position of the bent pipe (8); the support portion (4a) is fixedly connected to the second mounting portion (3) or the base (1); the two stoppers (4b) are fixedly connected to the left side position of the first mounting portion (2) one above the other; A horizontal pressure bar (5), slidably connected to the second mounting portion (3) along its own axis, corresponding to the position between the two stoppers (4b); A linear motion mechanism (6), acting on the pressure bar (5) to enable the pressure bar (5) to switch between pressing and releasing the rear position of the bent pipe (8).

2. The jig for tube welding according to claim 1, characterized in that, The linear motion mechanism (6) is a crank-slider mechanism.

3. The jig for tube welding according to claim 2, characterized in that, When the pressure bar (5) presses the rear position of the bent pipe (8), the first hinge point between the crank (6a) and the second mounting portion (3), the second hinge point between the connecting rod (6b) and the crank (6a), and the third hinge point between the connecting rod (6b) and the pressure bar (5) are all on the axis of the pressure bar (5).

4. The fixture for tube welding according to claim 1, characterized in that, The support portion (4a) can adjust its position up and down.

5. The jig for tube welding according to claim 4, characterized in that, The position where the support portion (4a) is fixedly connected is on the second mounting portion (3); a threaded rod (9) for adjusting the position is provided between the support portion (4a) and the base (1).

6. The jig for tube welding according to claim 1, characterized in that, In each group of placement openings (2a), a detachable plug (2a1) for restricting the front-back sliding of the straight pipe (7) is connected to the leftmost placement opening (2a).

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