CN213224926U - Four-way pipe welding clamp - Google Patents

Abstract

The utility model discloses a four-way pipe welding jig, include: the core die comprises a rack, wherein a core die holder is arranged on the rack, a push-pull air cylinder and a core die are horizontally arranged on the core die holder, the push-pull air cylinder is connected with a concave push block, a positioning pin pipe is arranged in the core die, an upper positioning mechanism and a lower positioning mechanism are arranged on the rack, an upper positioning rod in the upper positioning mechanism is matched with an inner hole of the positioning pin pipe, a hinge seat is arranged on the upper positioning mechanism, a handle is hinged on the hinge seat, the handle is connected with the upper positioning rod, a first inductive switch is arranged at the rear end of the hinge seat, and the first inductive switch is electrically connected with the push-pull air cylinder through a central control; the lower positioning rod in the lower positioning mechanism is matched with the inner hole of the positioning pin tube. The utility model has the advantages of can guarantee that the welding is less than or equal to 0.3 at two axialities between the joint on the pipe fitting, welding pipe fitting cooling such as need not wait after the welding is accomplished in addition just can take off the material with welding pipe fitting, improves production efficiency.

Description

Four-way pipe welding clamp

Technical Field

The utility model relates to a welding jig especially relates to four-way pipe welding jig.

Background

When a four-way pipe fitting such as an exhaust emission connecting pipe is produced, two symmetrical joints need to be welded on the pipe fitting, and the coaxiality between the two joints needs to be kept within 0.3. During welding, a pipe fitting to be welded is sleeved on a core die with a positioning hole, then a positioning bolt is inserted into a connecting hole of the pipe fitting and the positioning hole of the core die, then two connectors are respectively sleeved at two ends of the positioning bolt, the two connectors are respectively placed in two connecting holes of the pipe fitting to be welded through the positioning bolt, and then the two connectors are welded on the two connecting holes through a welding gun. Therefore, the coaxiality deviation between the two welded joints is generally over 0.8, and the coaxiality between the two welded joints needs to be adjusted by means of extra shaping work, so that the work difficulty is increased, and the work efficiency is reduced. And need wait the pipe fitting cooling after the welding is accomplished and just can take off the pipe fitting from the mandrel, further reduced work efficiency, the staff can't judge the pipe fitting temperature moreover, still often the mistake touches high temperature pipe fitting and appears scalding easily.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can guarantee that the axiality of welding between two joints on a pipe fitting is less than or equal to 0.3, and can take off the four-way pipe welding jig of material automatically.

In order to achieve the above object, the utility model adopts the following technical scheme: four-way pipe welding jig includes: the core mold comprises a machine frame, wherein a core mold base is arranged on the machine frame, a push-pull air cylinder is horizontally arranged on the core mold base, a concave push block is arranged on the core mold base in a sliding mode, the concave push block is connected with the push-pull air cylinder, a core mold is horizontally arranged on the core mold base, the concave push block is wrapped on the outer side wall of the core mold and can move left and right along the outer side wall of the core mold, a through hole penetrating through the upper side wall and the lower side wall of the core mold is formed in the core mold, a positioning pin pipe is arranged in the through hole, an upper positioning mechanism and a lower: the upper support is fixed above the rack, an upper air cylinder is arranged on the upper support, an upper positioning rod is connected to the bottom of an output shaft of the upper air cylinder, a first cylindrical step part and a second cylindrical step part are sequentially arranged on the upper positioning rod from bottom to top, the first cylindrical step part is matched with an inner hole of a positioning pin pipe, the second cylindrical step part is matched with an inner cavity of a joint to be welded, a hinged seat is arranged at the top of the upper air cylinder, a handle is hinged to the hinged seat, a connecting rod is hinged to the handle, the connecting rod is connected with the output shaft in the upper air cylinder, a first induction switch is arranged at the rear end of the hinged seat, and the first induction switch is electrically connected with the push-pull; the lower positioning mechanism includes: the lower support fixed below the rack is provided with a lower air cylinder on the lower support, the top of an output shaft of the lower air cylinder is connected with a lower positioning rod, a third cylindrical step part and a fourth cylindrical step part are sequentially arranged on the lower positioning rod from top to bottom, the third cylindrical step part is matched with an inner hole of a positioning pin pipe, the fourth cylindrical step part is matched with an inner cavity of a to-be-welded joint, and the error of the contact ratio between the central axis of the upper positioning rod and the central axis of the lower positioning rod is less than or equal to 0.3 mu m.

Further, aforementioned four-way pipe welding jig, wherein, be provided with second inductive switch at the front end of articulated seat, second inductive switch aligns with the front end of handle, and second inductive switch passes through central control device and last cylinder, lower cylinder electricity is connected.

Further, according to the four-way pipe welding fixture, the upper side wall and the lower side wall of the core mold are respectively provided with one limiting cushion block, the upper end and the lower end of the positioning pin pipe protrude outwards from the core mold, the two limiting cushion blocks are respectively sleeved at the upper end and the lower end of the positioning pin pipe, the limiting cushion blocks are connected with the core mold through countersunk bolts, and an adjustable gap is formed between the limiting cushion blocks and the core mold.

Furthermore, in the four-way pipe welding fixture, an adaptive adjusting gasket can be inserted into a gap between the core mold and the limiting cushion block.

Further, in the four-way pipe welding jig, the connection structure between the push-pull cylinder and the core mold base is as follows: the core die comprises a core die seat, a connecting seat, a cylinder seat, a sliding groove, a push-pull cylinder, a long sliding block and a concave push block, wherein the connecting seat is arranged on the core die seat, the cylinder seat is arranged on the connecting seat, the sliding groove penetrating through the left side wall and the right side wall of the cylinder seat is formed in the cylinder seat, the push-pull cylinder is arranged at the left side end of the cylinder seat, the output shaft of the push-pull cylinder is connected with the long sliding block, the long sliding block.

Further, aforementioned four-way pipe welding jig, wherein, the connection structure between push-and-pull cylinder and the long slider is: the output shaft of the push-pull cylinder is connected with a connecting rod with a ring groove, the long sliding block is provided with a ring buckle, and the ring buckle on the long sliding block is buckled in the ring groove of the connecting rod.

Further, in the four-way pipe welding fixture, an abutting portion capable of abutting against the pipe fitting is arranged on the core mold, and the abutting portion is flush with an abutting surface of the concave push block.

The utility model has the advantages that: a few position deviations can be caused when the pipe fittings to be welded are placed manually, the pipe fittings to be welded can be fixed on the core die by pulling the handle, and therefore the lower cylinder can not collide with the pipe fittings to be welded when the lower cylinder drives the lower positioning rod to be in butt joint with the connecting hole below the pipe fittings to be welded. The contact ratio error between the central axis of the upper positioning rod and the central axis of the lower positioning rod is less than or equal to 0.3 mu m, and the upper positioning rod and the lower positioning rod are matched with the same positioning pin pipe, so that when the upper positioning rod and the lower positioning rod respectively fix two joints in a positioning manner in connecting holes of pipe fittings to be welded for welding, the two joints cannot have position deviation, and the coaxiality between the two joints welded on the pipe fittings is less than or equal to 0.3. After the welding is completed, after the upper positioning rod and the lower positioning rod are separated from the corresponding joints, the handle is pulled upwards, the handle is touched with the first inductive switch, the push-pull cylinder is controlled to drive the concave push block to push away the welded pipe fitting from the core die, the pipe fitting does not need to be touched by a worker, the situation that the worker is scalded cannot occur, and the production efficiency is greatly improved.

Drawings

Fig. 1 is a schematic perspective view of a four-way pipe welding jig of the present invention.

Fig. 2 is a schematic structural view of the down-looking direction of the four-way pipe welding fixture of the present invention.

Fig. 3 is a schematic sectional view in the direction of a-a in fig. 2.

Fig. 4 is a schematic sectional view in the direction B-B in fig. 2.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and preferred embodiments.

As shown in fig. 1, fig. 2, fig. 3, and fig. 4, the four-way pipe welding jig of the present invention includes: a frame, a core die holder 1 is arranged on the frame, a connecting seat 2 is arranged on the core die holder 1, a cylinder seat 3 is arranged on the connecting seat 2, a chute 31 penetrating through the left and right side walls of the cylinder seat 3 is arranged in the cylinder seat 3, a push-pull cylinder 32 is arranged at the left end of the cylinder seat 3, a connecting rod 321 with a ring groove is connected on the output shaft of the push-pull cylinder 32, a long slide block 33 is arranged in the chute 31 in a sliding way, a ring buckle is arranged on the long slide block 33, the ring buckle on the long slide block 33 is buckled in the ring groove of the connecting rod 321, the right end of the long slide block 33 extends rightwards to the cylinder seat 3 and then is connected with a concave push block 34, the concave push block 34 is arranged on the core die holder 1 in a sliding way, a core die 11 is horizontally arranged on the core die holder 1, the concave push block 34 is wrapped on the outer side wall of the core die 11 and can move left, the abutting part 12 is flush with the pushing surface of the concave pushing block 34. A through hole penetrating through the upper side wall and the lower side wall of the core mold 11 is formed in the core mold 11, a positioning pin pipe 13 is arranged in the through hole, an upper positioning mechanism and a lower positioning mechanism are arranged on the frame, and the upper positioning mechanism comprises: an upper support 4 fixed above the frame, an upper cylinder 41 arranged on the upper support 4, an upper positioning rod 42 connected with the bottom of the output shaft of the upper cylinder 41, a first cylindrical step 43 and a second cylindrical step 44 sequentially arranged on the upper positioning rod 42 from bottom to top, the first cylindrical step 43 matching with the inner hole of the positioning pin tube 13, the second cylindrical step 44 matching with the inner cavity of the joint to be welded, a hinged seat 5 arranged on the top of the upper cylinder 41, a handle 51 hinged on the hinged seat 5, a connecting rod 52 hinged on the handle 51, the connecting rod 52 connecting with the output shaft in the upper cylinder 41, a first inductive switch 53 arranged at the rear end of the hinged seat 5, the first inductive switch 53 aligning with the rear end of the handle 51, the first inductive switch 53 electrically connected with the push-pull cylinder 32 through a central control device, a second inductive switch 54 arranged at the front end of the hinged seat 5, the second inductive switch 54 is aligned with the front end of the handle 51, and the second inductive switch 54 is electrically connected with the upper cylinder 41 through a central control device; the lower positioning mechanism includes: fix the lower support 6 in the frame below, be provided with down cylinder 61 on lower support 6, be connected with down locating lever 62 at the top of the output shaft of lower cylinder 61, third cylinder step portion 63 and fourth cylinder step portion 64 have set gradually from the top down on locating lever 62 down, third cylinder step portion 63 and locating pin pipe 13's hole looks adaptation, fourth cylinder step portion 64 and the inner chamber looks adaptation of treating welded joint, second inductive switch 54 is connected with lower cylinder 61 electricity through central control device. The contact error between the central axis of the upper positioning rod 42 and the central axis of the lower positioning rod 62 is less than or equal to 0.3 μm.

In this embodiment, the upper and lower side walls of the core mold 11 are respectively provided with a limit cushion block 14, the upper and lower ends of the positioning pin tube 13 protrude outward from the core mold 11, the two limit cushion blocks 14 are respectively sleeved at the upper and lower ends of the positioning pin tube 13, the limit cushion blocks 14 are connected with the core mold 11 through countersunk bolts, an adjustable gap is provided between the limit cushion blocks 14 and the core mold 11, and an adaptive adjusting gasket 15 can be inserted into the gap. When the pipe fitting to be welded is sleeved on the core die 11, the two limiting cushion blocks 14 can abut against the inner side wall of the pipe fitting to be welded for limiting the pipe fitting to be welded, and after the joint is placed in the connecting hole of the pipe fitting to be welded, the joint abuts against the limiting cushion blocks 14, so that the position of the joint is limited. If the inner diameter of the pipe to be welded is larger, when the independent limiting cushion block 14 cannot abut against the inner side wall of the pipe to be welded, the adaptive adjusting gasket 15 can be inserted into the gap between the core mold 11 and the limiting cushion block 14, so that the limiting cushion block 14 is lifted up, and the limiting cushion block 14 plays a corresponding limiting role.

The working principle of the utility model is as follows: firstly, a pipe fitting to be welded is sleeved on a core die 11, then an adjusting gasket 15 which is matched with the pipe fitting to be welded is inserted into a gap between a limiting cushion block 14 and the core die 11, so that the limiting cushion blocks 14 on the upper side and the lower side of the core die 11 are simultaneously abutted against the inner side wall of the pipe fitting to be welded, and then the limiting cushion blocks 14 are fixedly connected with the core die 11 by using countersunk bolts. A joint is placed in a connecting hole above a pipe fitting to be welded, the joint abuts against a limiting cushion block 14, a joint is sleeved on a lower positioning rod 62 and is positioned on a fourth cylindrical step portion 64, then a handle 51 is pulled downwards, the handle 51 drives an output shaft in an upper air cylinder 41 and an upper positioning rod 42 to move downwards towards the direction of a core mold 11 through a connecting rod 52, a first cylindrical step portion 43 on the upper positioning rod 42 downwards penetrates through the joint above the pipe fitting to be welded and then extends into an inner hole of a positioning pin pipe 13, a step on the first cylindrical step portion 43 abuts against the inner wall of the joint, a step on a second cylindrical step portion 44 abuts against the top end of the joint, and meanwhile, the pipe fitting to be welded is positioned on the core mold 11 by the upper positioning rod 42. At this time, the front end of the handle 51 touches the second inductive switch 54, the second inductive switch 54 sends a signal to the central control device, the central control device controls the upper cylinder 41 to fix the upper positioning rod 42, the central control device controls the lower cylinder 61 to drive the lower positioning rod 62 to move upwards towards the core mold 11, the third cylindrical step part 63 on the lower positioning rod 62 extends into the inner hole of the positioning pin pipe 13, the joint on the fourth cylindrical step part 64 enters the connecting hole below the pipe to be welded and abuts against the limiting cushion block 14 below the core mold 11, and then the welding gun is used for welding the two joints on the pipe to be welded. After welding, the handle 51 is pulled upwards, the front end of the handle 51 is separated from the second inductive switch 54, the second inductive switch 54 controls the upper air cylinder 41 to drive the output shaft in the upper air cylinder 41 to drive the upper positioning rod 42 to upwards separate from the joint above the pipe fitting through the central control device, and controls the lower air cylinder 61 to drive the output shaft in the lower air cylinder 61 to drive the lower positioning rod 62 to downwards separate from the joint below the pipe fitting. Then the handle 51 is continuously pulled, the rear end of the handle 51 touches the first inductive switch 53, the first inductive switch 53 controls the push-pull cylinder 32 through the central control device to drive the output shaft in the push-pull cylinder 32 and the connecting rod 321 to drive the long slide block 33 to push the concave push block 34 in the chute 31, and the concave push block 34 moves to the right on the core mold 11, so that the welded pipe fitting is pushed away from the core mold 11.

The utility model has the advantages that: a few position deviations can be caused when the pipe fittings to be welded are placed manually, the pipe fittings to be welded can be fixed on the core die by pulling the handle, and therefore the lower cylinder can not collide with the pipe fittings to be welded when the lower cylinder drives the lower positioning rod to be in butt joint with the connecting hole below the pipe fittings to be welded. The contact ratio error between the central axis of the upper positioning rod and the central axis of the lower positioning rod is less than or equal to 0.3 mu m, and the upper positioning rod and the lower positioning rod are matched with the same positioning pin pipe, so that when the upper positioning rod and the lower positioning rod respectively fix two joints in a positioning manner in connecting holes of pipe fittings to be welded for welding, the two joints cannot have position deviation, and the coaxiality between the two joints welded on the pipe fittings is less than or equal to 0.3. After the welding is completed, after the upper positioning rod and the lower positioning rod are separated from the corresponding joints, the handle is pulled upwards, the handle is touched with the first inductive switch, the push-pull cylinder is controlled to drive the concave push block to push away the welded pipe fitting from the core die, the pipe fitting does not need to be touched by a worker, the situation that the worker is scalded cannot occur, and the production efficiency is greatly improved.

Claims (7)

1. Four-way pipe welding jig includes: the frame, its characterized in that: the core mold comprises a frame, and is characterized in that a core mold base is arranged on the frame, a push-pull cylinder is horizontally arranged on the core mold base, a concave push block is arranged on the core mold base in a sliding manner, the concave push block is connected with the push-pull cylinder, a core mold is horizontally arranged on the core mold base, the concave push block is wrapped on the outer side wall of the core mold and can move left and right along the outer side wall of the core mold, a through hole penetrating through the upper side wall and the lower side wall of the core mold is formed in the core mold, a positioning pin pipe is arranged in the through hole, an upper positioning mechanism and: the upper support is fixed above the rack, an upper air cylinder is arranged on the upper support, an upper positioning rod is connected to the bottom of an output shaft of the upper air cylinder, a first cylindrical step part and a second cylindrical step part are sequentially arranged on the upper positioning rod from bottom to top, the first cylindrical step part is matched with an inner hole of a positioning pin pipe, the second cylindrical step part is matched with an inner cavity of a joint to be welded, a hinged seat is arranged at the top of the upper air cylinder, a handle is hinged to the hinged seat, a connecting rod is hinged to the handle, the connecting rod is connected with the output shaft in the upper air cylinder, a first induction switch is arranged at the rear end of the hinged seat, and the first induction switch is electrically connected with the push-pull; the lower positioning mechanism includes: the lower support fixed below the rack is provided with a lower air cylinder on the lower support, the top of an output shaft of the lower air cylinder is connected with a lower positioning rod, a third cylindrical step part and a fourth cylindrical step part are sequentially arranged on the lower positioning rod from top to bottom, the third cylindrical step part is matched with an inner hole of a positioning pin pipe, the fourth cylindrical step part is matched with an inner cavity of a to-be-welded joint, and the error of the contact ratio between the central axis of the upper positioning rod and the central axis of the lower positioning rod is less than or equal to 0.3 mu m.

2. The four-way pipe welding jig of claim 1, characterized in that: the front end of the hinged seat is provided with a second inductive switch, the second inductive switch is aligned with the front end of the handle, and the second inductive switch is electrically connected with the upper cylinder and the lower cylinder through the central control device.

3. A four-way pipe welding jig according to claim 1 or 2, characterized in that: the upper side wall and the lower side wall of the core mold are respectively provided with a limiting cushion block, the upper end and the lower end of the positioning pin pipe are outwards protruded out of the core mold, the two limiting cushion blocks are respectively sleeved at the upper end and the lower end of the positioning pin pipe, the limiting cushion blocks are connected with the core mold through countersunk bolts, and an adjustable gap is arranged between the limiting cushion blocks and the core mold.

4. A four-way pipe welding jig according to claim 3, characterized in that: and a matched adjusting gasket can be inserted into a gap between the core mold and the limiting cushion block.

5. A four-way pipe welding jig according to claim 1 or 2, characterized in that: the connecting structure between the push-pull cylinder and the core mold seat is as follows: the core die comprises a core die seat, a connecting seat, a cylinder seat, a sliding groove, a push-pull cylinder, a long sliding block and a concave push block, wherein the connecting seat is arranged on the core die seat, the cylinder seat is arranged on the connecting seat, the sliding groove penetrating through the left side wall and the right side wall of the cylinder seat is formed in the cylinder seat, the push-pull cylinder is arranged at the left side end of the cylinder seat, the output shaft of the push-pull cylinder is connected with the long sliding block, the long sliding block.

6. A four-way pipe welding jig according to claim 5, characterized in that: the connecting structure between the push-pull air cylinder and the long sliding block is as follows: the output shaft of the push-pull cylinder is connected with a connecting rod with a ring groove, the long sliding block is provided with a ring buckle, and the ring buckle on the long sliding block is buckled in the ring groove of the connecting rod.

7. A four-way pipe welding jig according to claim 1 or 2, characterized in that: the core mould is provided with an abutting part which can abut against the pipe fitting, and the abutting part is flush with the abutting surface of the concave push block.

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