Forming mechanism of pipe end forming machine

Abstract

The utility model discloses a forming mechanism of a pipe end forming machine, which comprises a driving seat, an oil inlet nozzle is arranged at the top of the driving seat, an oil cavity is arranged in the driving seat, two groups of positioning seats are arranged on the outer side of the oil cavity, and a primary forming die and a secondary forming die are respectively arranged on the two groups of positioning seats. A square pipe is installed at the end of the one-time forming die, the end of the square pipe is inserted into the clamp, the one-time forming die comprises a connecting base, a fixing base is fixedly welded to the end of the connecting base, and meanwhile the fixing base covers the outer side of the positioning base and is fixedly connected with the positioning base through a plurality of sets of bolts arranged at equal intervals. According to the forming mechanism of the pipe end forming machine, resistance encountered by the forming die in the inserting and forming processes is greatly reduced, and the situation that in the forming process, friction force between the die and a square pipe possibly causes surface damage such as scratches and scratches on the inner wall of the pipe can be avoided.

Description

Technical Field

[0001] The utility model relates to the field of pipe end forming machines, in particular to a forming mechanism of a pipe end forming machine. Background Art

[0002] The working principle of the tube end forming machine is as follows: the tube end forming machine is equipped with a special tube clamping device; a lifting cylinder is used to drive the concave plate to move, and the oblique stroke groove on the side wall of the concave plate cooperates with the slide shaft on the slide to make the slide move horizontally, thereby driving the upper and lower clamping dies to move on the slide rail, and clamping or loosening the tube according to the principle of the inclined wedge; some use multiple clamping dies that are pushed toward the center by a driving device such as a cylinder or an oil cylinder to clamp the tube from multiple directions; the forming die or actuator is driven by a hydraulic system or motor to process the tube end; for example, a hydraulically driven push cylinder pushes the tube end forming die toward the end of the tube to perform forming operations such as expanding, shrinking, and upsetting the tube.

[0003] Taking the forming of square tube ends into round tubes as an example, in actual operation, when a tapered die is inserted into the interior of the square tube for forming, the friction between the tapered die rod and the inner wall of the square tube increases due to lack of lubrication. During the forming process, this friction may cause scratches, abrasions and other surface damage to the inner wall of the tube. These surface damages not only affect the appearance quality of the tube, but may also reduce the strength and sealing of the tube. Utility Model Content

[0004] The purpose of the present invention is to provide a forming mechanism of a pipe end forming machine to solve the defects mentioned in the above background technology.

[0005] In order to achieve the above-mentioned purpose, a forming mechanism of a tube end forming machine is provided, including a driving seat, an oil inlet nozzle is installed on the top of the driving seat, and an oil chamber is opened inside the driving seat, and two groups of positioning seats are provided on the outside of the oil chamber, and a primary forming mold and a secondary forming mold are respectively installed on the two groups of positioning seats, a square tube is installed at the end of the primary forming mold, and the end of the square tube is inserted into the inside of the clamp, the primary forming mold includes a connecting seat, and a fixed seat is welded and fixed to the end of the connecting seat, and the fixed seat covers the outside of the positioning seat and is fixedly connected by multiple groups of equidistant bolts.

[0006] Preferably, the primary molding die and the secondary molding die have the same composition structure, both the primary molding die and the secondary molding die are hollow, and the primary molding die and the secondary molding die have the same length.

[0007] Preferably, both ends of the primary molding die and the secondary molding die are provided with intervention ends, and the intervention end on the primary molding die is conical, while the intervention end on the secondary molding die is circular.

[0008] Preferably, multiple groups of oil outlet holes are provided on the surfaces of the primary molding die and the secondary molding die, and the distances between two adjacent groups of oil outlet holes are consistent. At the same time, the oil outlet holes are connected to the oil cavity inside the driving seat.

[0009] Preferably, a positioning ring is fixedly installed on the bottom of the connecting seat, and the positioning ring is adapted to the size of the positioning seat. At the same time, the positioning ring is inserted into the interior of the positioning seat, and the depth of the positioning groove opened inside the positioning seat is equal to the thickness of the positioning ring.

[0010] A sealing gasket is sleeved on the outer side of the positioning ring, and the fixing seat covers the outer side of the oil inlet nozzle and is sealed and connected through the sealing gasket arranged in an annular shape.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. The utility model discharges lubricating oil from a large number of oil outlet holes to lubricate the space between the primary molding die and the square tube. When the primary molding die is withdrawn, the secondary molding die is re-inserted into the primary molding square tube to perform secondary molding. At the same time, lubricating oil is discharged from a large number of oil outlet holes to lubricate the space between the secondary molding die and the square tube. Through the double molding method, the molding effect of the square tube end is improved;

[0013] 2. The present invention can lubricate the contact surface of the square tube and the forming die through friction forming, and form a lubricating film between the forming die and the square tube, effectively reducing the friction coefficient between the two. This greatly reduces the resistance encountered by the forming die during the insertion and forming process, and can avoid the friction between the die and the square tube during the forming process, which may cause scratches, abrasions and other surface damage to the inner wall of the tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view schematic diagram of the structure of the utility model;

[0015] Figure 2 for Figure 1 Bottom view of

[0016] Figure 3 for Figure 1 A top view of

[0017] Figure 4 Schematic diagram of a one-step molding mold.

[0018] Numbers in the figure: 1. Drive seat; 2. Oil inlet nozzle; 21. Oil chamber; 22. Positioning seat; 3. Primary molding die; 31. Oil outlet hole; 32. Intervention end; 33. Connecting seat; 34. Fixed seat; 35. Sealing gasket; 36. Positioning ring; 4. Secondary molding die; 5. Square tube; 6. Clamp. DETAILED DESCRIPTION

[0019] See also Figure 1-4 The utility model provides a forming mechanism of a tube end forming machine, comprising a driving seat 1, an oil inlet nozzle 2 is installed on the top of the driving seat 1, and an oil chamber 21 is opened inside the driving seat 1, and two groups of positioning seats 22 are provided on the outside of the oil chamber 21, and a primary forming mold 3 and a secondary forming mold 4 are respectively installed on the two groups of positioning seats 22, a square tube 5 is installed at the end of the primary forming mold 3, and the end of the square tube 5 is inserted into the inside of the clamp 6, the primary forming mold 3 includes a connecting seat 33, and a fixing seat 34 is welded and fixed to the end of the connecting seat 33, and the fixing seat 34 covers the outside of the positioning seat 22 and is fixedly connected by multiple groups of equidistant bolts.

[0020] Working principle: A primary molding die 3 and a secondary molding die 4 are respectively installed on the driving seat 1, and the diameter of the primary molding die 3 is smaller than that of the secondary molding die 4; first, the end molding work of the square tube 5 is performed by the primary molding die 3, and the method is: the primary molding die 3 moves laterally under the action of the driving seat 1, and the primary molding die 3 is inserted into the interior of the square tube 5 through the intervention end 32 with a conical end setting, and at the same time, the lubricating oil is discharged from a large number of oil outlet holes 31 to lubricate the primary molding die 3 and the square tube 5. When the primary molding die 3 is pulled out, the secondary molding die 4 is re-inserted into the interior of the square tube 5 that has been initially molded to perform secondary molding work, and at the same time, the lubricating oil is discharged from a large number of oil outlet holes 31 to lubricate the secondary molding die 4 and the square tube 5. During the friction forming process between the square tube 5 and the forming die, the contact surface can be lubricated by lubricating oil; a lubricating film can be formed between the forming die and the square tube 5, effectively reducing the friction coefficient between the two; this greatly reduces the resistance encountered by the forming die during the insertion and forming process, and the equipment runs more smoothly; at the same time, it reduces the heat generated by friction, reduces the thermal load of the equipment, and extends the service life of the equipment; with the lubricating effect of the lubricating oil, the contact between the forming die and the square tube 5 is more uniform, making the force distribution of the tube more uniform during the forming process; this helps to improve the precision and quality of the forming, reduce the deformation and damage of the tube, and avoid the friction between the die and the square tube during the forming process, which may cause scratches, abrasions and other surface damage to the inner wall of the tube.

[0021] The primary molding die 3 and the secondary molding die 4 have the same composition structure. Both the primary molding die 3 and the secondary molding die 4 are hollow. At the same time, the primary molding die 3 and the secondary molding die 4 have the same length.

[0022] As a preferred embodiment, both the ends of the primary molding die 3 and the secondary molding die 4 are provided with an intervention end 32, and the intervention end 32 on the primary molding die 3 is conical, while the intervention end 32 on the secondary molding die 4 is circular.

[0023] Multiple groups of oil outlet holes 31 are provided on the surface of the primary molding die 3 and the secondary molding die 4 , and the distance between two adjacent groups of oil outlet holes 31 is consistent. At the same time, the oil outlet holes 31 are connected to the oil cavity 21 inside the driving seat 1 .

[0024] As a preferred embodiment, a positioning ring 36 is fixedly installed at the bottom of the connecting seat 33, and the positioning ring 36 is adapted to the size of the positioning seat 22. At the same time, the positioning ring 36 is inserted into the inside of the positioning seat 22, and the depth of the positioning groove opened inside the positioning seat 22 is equal to the thickness of the positioning ring 36.

[0025] A sealing gasket 35 is sleeved on the outer side of the positioning ring 36 , and the fixing seat 34 covers the outer side of the oil inlet nozzle 2 and is sealed by the sealing gasket 35 arranged in an annular shape.

Claims

1. A forming mechanism of a pipe end forming machine, comprising a drive seat (1), characterized in that: An oil inlet nozzle (2) is installed on the top of the driving seat (1), and an oil cavity (21) is opened inside the driving seat (1). At the same time, two groups of positioning seats (22) are arranged outside the oil cavity (21), and the two groups of positioning seats (22) are respectively installed with a primary molding die (3) and a secondary molding die (4). A square tube (5) is installed at the end of the primary molding die (3), and the end of the square tube (5) is inserted into the inside of the clamp (6). The primary molding die (3) includes a connecting seat (33), and a fixing seat (34) is welded and fixed to the end of the connecting seat (33). At the same time, the fixing seat (34) covers the outside of the positioning seat (22) and is fixedly connected by multiple groups of equidistantly arranged bolts.

2. The forming mechanism of the pipe end forming machine according to claim 1, characterized in that: The primary molding die (3) and the secondary molding die (4) have the same composition structure, and both the primary molding die (3) and the secondary molding die (4) are hollow. At the same time, the primary molding die (3) and the secondary molding die (4) have the same length.

3. The forming mechanism of the tube end forming machine according to claim 2, characterized in that: The ends of the primary molding die (3) and the secondary molding die (4) are both provided with an intervention end portion (32), and the intervention end portion (32) on the primary molding die (3) is arranged in a conical shape, while the intervention end portion (32) on the secondary molding die (4) is arranged in a circular shape.

4. The forming mechanism of the tube end forming machine according to claim 1, characterized in that: The surfaces of the primary molding die (3) and the secondary molding die (4) are both provided with a plurality of groups of oil outlet holes (31), and the distances between two adjacent groups of oil outlet holes (31) are consistent. The oil outlet holes (31) are also connected to the oil cavity (21) inside the drive seat (1).

5. The forming mechanism of the pipe end forming machine according to claim 1, characterized in that: A positioning ring (36) is fixedly installed at the bottom of the connecting seat (33), and the positioning ring (36) is adapted to the size of the positioning seat (22). At the same time, the positioning ring (36) is inserted into the interior of the positioning seat (22), and the depth of the positioning groove opened inside the positioning seat (22) is equal to the thickness of the positioning ring (36).

6. The forming mechanism of the pipe end forming machine according to claim 5, characterized in that: The outer side of the positioning ring (36) is sleeved with a sealing gasket (35), and the fixing seat (34) covers the outer side of the oil inlet nozzle (2) and is sealed and connected via the sealing gasket (35) arranged in an annular shape.

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