Pipe fitting necking device

Abstract

The invention discloses a pipe fitting necking device which comprises a base plate, a feeding mechanism and an upper clamping piece are installed on the base plate, a longitudinal moving mechanism is installed on the feeding mechanism, the longitudinal moving mechanism is in driving connection with a mounting plate, a material taking mechanism is installed on the mounting plate, and a necking assembly and an inner supporting assembly are installed on the left side and the right side of the upper clamping piece correspondingly. The necking assembly comprises a second linear driver arranged on the upper clamping piece, the second linear driver is in driving connection with a necking piece, the inner supporting assembly comprises a third linear driver arranged on the upper clamping piece, the third linear driver is in driving connection with a core rod, and the material taking mechanism comprises two fixing bases and a moving base located between the two fixing bases. And lower clamping pieces are mounted on the fixed seat and the movable seat.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipe machining, in particular to a pipe necking device. BACKGROUND

[0002] The pipe necking process is widely used in the fields of pipe connection and part assembly, which realizes sealing, connection or structural reinforcement by making the pipe end radially contract. The traditional necking equipment adopts a fixed clamping structure. During the material taking and feeding stage, the pipe is prone to position deviation, which affects the positioning accuracy. During the necking forming stage, the pipe end often lacks effective support and only relies on one-way pressure of the die, which easily leads to pipe wall instability, wrinkling or uneven deformation, seriously affecting the product quality and processing consistency. SUMMARY

[0003] The purpose of the present application is to overcome the shortcomings of the prior art and provide a pipe necking device.

[0004] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0005] The present application discloses a pipe necking device, which comprises a base plate, a feeding mechanism and an upper clamping piece are installed on the base plate, a longitudinal moving mechanism is installed on the feeding mechanism, the longitudinal moving mechanism is drivingly connected with a mounting plate, a material taking mechanism is installed on the mounting plate, a necking assembly and an inner support assembly are respectively installed on the left and right sides of the upper clamping piece, the necking assembly comprises a linear actuator two on the upper clamping piece, the linear actuator two is drivingly connected with a necking piece, the inner support assembly comprises a linear actuator three installed on the upper clamping piece, the linear actuator three is drivingly connected with a mandrel, the material taking mechanism comprises two fixed seats and a moving seat located between the two fixed seats, and a lower clamping piece is installed on the fixed seat and the moving seat.

[0006] Further, a transverse moving mechanism is arranged on the mounting plate, the transverse moving mechanism can drive the moving seat to move, the transverse moving mechanism comprises a lead screw motor two installed in the mounting plate, the lead screw motor two is drivingly connected with a lead screw two, the moving seat is installed on the lead screw two, and the moving seat can move between the fixed seat on the side close to the necking assembly and the middle of the upper part of the mounting plate.

[0007] Further, the longitudinal moving mechanism comprises a lead screw motor one, the lead screw motor one is drivingly connected with a lead screw one, a lead screw slider is installed on the lead screw one, and the mounting plate is fixedly connected with the lead screw slider.

[0008] Further, the feeding mechanism comprises a feeding plate and a guide plate, the feeding plate and the guide plate are arranged in parallel, a plurality of connecting rods are connected between the feeding plate and the guide plate, two guide rails are connected to the side of the feeding plate close to the upper clamping piece, and the guide rails are located at the left and right ends close to the feeding plate.

[0009] The positioning block is connected to one end of the guide rail close to the upper clamping piece. The first material blocking piece and the second material blocking piece are respectively arranged on the blanking plate and the guide plate. The first material blocking piece is arranged closer to the upper clamping piece than the second material blocking piece.

[0010] Further, the first material blocking piece comprises a plurality of linear actuators five, which are installed at one end of the blanking plate close to the upper clamping piece. The linear actuators five are drivingly connected with a blocking block, and the upper end of the blocking block can exceed the upper surface of the blanking plate.

[0011] Further, the second material blocking piece comprises two linear actuators four, which are respectively arranged on the left and right sides of the upper part of the guide plate. The linear actuators four are drivingly connected with a clamping strip. The clamping strip is in a U shape, and the end of the clamping strip can be inserted into the pipe.

[0012] Further, the upper clamping piece comprises a support frame and an upper clamping block installed on the support frame. The upper clamping block is provided with a clamping groove at the lower part. The lower clamping piece comprises a linear actuator one, which is drivingly connected with a lower clamping block. The lower clamping block is provided with a support groove at the upper part.

[0013] Further, the lower clamping block is provided with a positioning groove at the upper part. The positioning groove is provided with two rows, which are respectively located on the front and rear sides of the support groove. The lower part of the upper clamping block is provided with a positioning strip, which can be clamped into the positioning groove.

[0014] Further, the necking assembly comprises a linear actuator two installed on the support frame. The linear actuator two is drivingly connected with a necking piece. The necking piece comprises a chuck body, a large bevel gear and four clamping jaws. The inner end of the clamping jaw is provided with a necking groove. The large bevel gear is rotatably arranged in the chuck body. The side of the large bevel gear facing the clamping jaw is provided with a spiral groove. The clamping jaw is matched with the spiral groove on the large bevel gear. A servo motor is installed on the side surface of the chuck body. The servo motor is drivingly connected with a small bevel gear. The small bevel gear is engaged with the large bevel gear. The end surface of the chuck body is provided with a guide groove, which is arranged along the radial direction of the chuck body. The clamping jaw comprises a guide block, which is arranged in the guide groove and can move along the guide groove.

[0015] The beneficial effects of the present application are as follows: by adjusting the position of the lower clamping piece during the material taking and necking processes, the position of the pipe can be stabilized during the material taking process. The end of the pipe can be effectively supported, clamped and fixed during the necking process, so that the necking can be normally performed. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of the pipe necking device in the embodiment.

[0017] Figure 2 It is a sectional view of the pipe necking device in the embodiment.

[0018] Figure 3 It is a partial structural schematic view of the pipe necking device in the embodiment.

[0019] Figure 4 The assembly diagram of the upper clamp block and the lower clamp block in the embodiment;

[0020] Figure 5 The structure diagram of the necking element in the embodiment.

[0021] The drawings show that the device comprises a base plate 1, a feeding mechanism 2, a pipe 3, a longitudinal moving mechanism 4, a mounting plate 5, a fixed seat 6, a moving seat 7, a lower clamp 8, an upper clamp 9, a transverse moving mechanism 10, a necking assembly 11, an inner support assembly 12, a screw motor 1 13, a screw 1 14, a screw sliding block 15, a screw motor 2 16, a screw 2 17, a linear driver 1 18, a lower clamp block 19, a support frame 20, an upper clamp block 21, a blanking plate 22, a guide plate 23, a connecting rod 24, a guide rail 25, a positioning block 26, a side plate 27, a linear driver 5 28, a stop block 29, a linear driver 2 30, a necking element 31, a linear driver 3 32, a mandrel 33, a linear driver 4 34, a clamping strip 35, a clamping groove 36, a supporting groove 37, a positioning groove 38, a positioning strip 39, a chuck body 40, a large bevel gear 41, a clamping jaw 42, a necking groove 43, a guide groove 44, a guide block 45 and a servo motor 46. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0023] As Figures 1-5As shown, a pipe necking device, including a base plate 1, a feeding mechanism 2 and an upper clamp 9 are installed on the base plate 1, a longitudinal moving mechanism 4 is installed on the feeding mechanism 2, the longitudinal moving mechanism 4 is drivingly connected with a mounting plate 5, a material taking mechanism is installed on the mounting plate 5, a necking assembly 11 and an inner support assembly 12 are respectively installed on the left and right sides of the upper clamp 9, the necking assembly 11 includes a linear actuator two 30 installed on the upper clamp 9, the linear actuator two 30 is drivingly connected with a necking piece 31, the inner support assembly 12 includes a linear actuator three 32 installed on the upper clamp 9, the linear actuator three 32 is drivingly connected with a mandrel 33, the material taking mechanism includes two fixed seats 6 and a moving seat 7 located between the two fixed seats 6, the fixed seat 6 and the moving seat 7 are both provided with a lower clamp 8, the upper clamp 9 includes a support frame 20 and an upper clamp block 21 installed on the support frame 20, a clamping groove 36 is formed in the lower part of the upper clamp block 21, the lower clamp 8 includes a linear actuator one 18, the linear actuator one 18 is drivingly connected with a lower clamp block 19, a supporting groove 37 is formed in the upper part of the lower clamp block 19, the clamping groove 36 and the supporting groove 37 can be attached to the outer periphery of the pipe 3, so as to effectively clamp and fix the pipe 3. The position of the fixed seat 6 is located in the middle position of the two positioning blocks 26, so that the material taking will not be affected.

[0024] Further, a transverse moving mechanism 10 is arranged on the mounting plate 5, the transverse moving mechanism 10 can drive the moving seat 7 to move, the transverse moving mechanism 10 includes a lead screw motor two 16 installed in the mounting plate 5, the lead screw motor two 16 is drivingly connected with a lead screw two 17, the moving seat 7 is installed on the lead screw two 17, the moving seat 7 can move between the fixed seat 6 close to the necking assembly 11 and the middle position of the upper part of the mounting plate 5. When taking the material, the mounting plate 5 drives the fixed seat 6 and the moving seat 7 to move, so that the three lower clamps 8 reach below a single pipe 3 on the feeding mechanism 2. The lower clamp block 19 of the lower clamp 8 rises to lift the pipe 3, so that the pipe 3 is higher than the positioning block 26. The mounting plate 5 drives the lower clamp 8 to move to the upper clamp block 21, and reaches below the upper clamp block 21. The lower clamp block 19 rises to abut against the upper clamp block 21, thereby completing the clamping and fixing of the pipe 3.

[0025] During the material taking process, the moving seat 7 is located in the middle position of the mounting plate 5, that is, in the middle position of the two fixed seats 6, so that the spacing of each lower clamp 8 is the same, the lower clamp 8 on the moving seat 7 bears the weight of the middle part of the pipe 3, avoiding the up and down swing of the pipe 3 due to no support in the middle when supported at two points. The lower clamp 8 at the middle position can offset the tilting trend of the end part, ensuring that the pipe always remains horizontal during material taking.

[0026] During the necking process, the moving seat 7 moves to the fixed seat 6 close to the necking assembly 11, so that the two lower clamping pieces 8 close to each other to support the end of the pipe 3 to ensure the firmness of the pipe end clamping, thereby avoiding the movement of the pipe end during the necking process, and ensuring the normal progress of the necking process.

[0027] The longitudinal moving mechanism 4 comprises a lead screw motor 13, the lead screw motor 13 is drivingly connected with a lead screw 14, the lead screw 14 is provided with a lead screw sliding block 15, and the mounting plate 5 is fixedly connected with the lead screw sliding block 15 through bolts.

[0028] Further, the feeding mechanism 2 comprises a discharging plate 22 and a guide plate 23, the discharging plate 22 and the guide plate 23 are arranged in parallel, the pipe 3 slides between the discharging plate 22 and the guide plate 23 for feeding, a plurality of connecting rods 24 are connected between the discharging plate 22 and the guide plate 23, the discharging plate 22 is connected with two guide rails 25 on the side close to the upper clamping piece 9, the guide rails 25 are located close to the left and right ends of the discharging plate 22, and outer sides of the two guide rails 25 are provided with side plates 27.

[0029] An end of the guide rail 25 close to the upper clamping piece 9 is connected with a positioning block 26, the discharging plate 22 and the guide plate 23 are respectively provided with first and second material blocking pieces, and the first material blocking piece is arranged closer to the upper clamping piece 9 than the second material blocking piece. The inclination of the guide rail 25 is greater than that of the discharging plate 22, so that the pipe 3 on the discharging plate 22 can slide along the surface of the guide rail 25 under the action of gravity after being released by the first and second material blocking pieces, and then be blocked by the positioning block 26.

[0030] The first and second material blocking pieces cooperate to make only one pipe 3 reach the positioning block 26 each time, and then the feeding and taking mechanism takes the pipe.

[0031] Specifically, the first material blocking piece comprises a plurality of linear actuators five 28, the linear actuators five 28 are installed on one end of the discharging plate 22 close to the upper clamping piece 9, the linear actuators five 28 are drivingly connected with blocking blocks 29, and the upper ends of the blocking blocks 29 can exceed the upper surface of the discharging plate 22, so as to block and limit the sliding pipe 3. The second material blocking piece comprises two linear actuators four 34 arranged on the left and right sides of the upper part of the guide plate 23, the linear actuators four 34 are drivingly connected with clamping strips 35, the clamping strips 35 are in U shape, and the end portions of the clamping strips 35 can extend into the end portions of the second pipe 3.

[0032] During feeding, linear actuator 5 28 drives stop 29 to retract, releasing the obstruction on the first pipe fitting 3, allowing it to slide down guide rail 25 and reach positioning block 26 where it is blocked. Linear actuator 5 28 then drives stop 29 to extend back to its original position, and linear actuator 4 34 drives clamping strip 35 to retract, causing the end of clamping strip 35 to disengage from the end of the second pipe fitting 3, releasing the obstruction on the second pipe fitting 3. The remaining pipe fittings on feed plate 22 slide down its upper surface until the first of the remaining pipe fittings 3 is blocked by stop 29. Then, clamping strip 35 of the second stop extends into the second of the remaining pipe fittings 3, completing the feeding cycle. This process is repeated to ensure feeding of a single pipe fitting 3 each time.

[0033] Since the cross-section of the pipe fitting 3 is square, and the inner side of the positioning block 26 is perpendicular to the upper surface of the guide rail 25, it can fit against the two sides of the pipe fitting 3 respectively, preventing the pipe fitting 3 from shaking or shifting. At the same time, the cooperation between the guide rail 25 and the positioning block 26 can realize the positioning of the pipe fitting 3, which facilitates the subsequent unloading of the lower clamping part 8.

[0034] When the pipe fitting 3 reaches the positioning block 26, it is deflected at 45 degrees, which matches the shape of the support groove 37 on the lower clamping block 19 and the clamping groove 36 on the upper clamping block 21, making it convenient for subsequent material handling and clamping.

[0035] The lower clamping block 19 has a positioning groove 38 on its upper part. There are two rows of positioning grooves 38, which are located on the front and rear sides of the support groove 37 respectively. The upper clamping block 21 has a positioning strip 39 on its lower part. The positioning strip 39 can be inserted into the positioning groove 38. Through the cooperation of the positioning strip 39 and the positioning groove 38, the assembly position of the upper clamping block 21 and the lower clamping block 19 is positioned to ensure that the two are assembled in the correct position to clamp the pipe fitting 3.

[0036] like Figure 5 As shown, the necking assembly 11 includes a linear actuator 30 mounted on the support frame 20. The linear actuator 30 drives and connects to the necking component 31. The necking component 31 includes a chuck body 40, a large bevel gear 41, and four jaws 42. The inner end of the jaws 42 is provided with a necking groove 43. The large bevel gear 41 is rotatably arranged inside the chuck body 40. The side of the large bevel gear 41 facing the jaws 42 is provided with a spiral groove. The jaws 42 cooperate with the spiral groove on the large bevel gear 41. A servo motor 46 is mounted on the side of the chuck body 40. The servo motor 46 drives and connects to a small bevel gear. The small bevel gear meshes with the large bevel gear 41. A guide groove 44 is provided on the end face of the chuck body 40. The guide groove 44 is arranged radially along the chuck body 40. The jaws 42 include a guide block 45. The guide block 45 is disposed in the guide groove 44 and can move along the guide groove 44.

[0037] The servo motor 46 drives the small bevel gear to rotate, and the small bevel gear drives the large bevel gear 41 to rotate. When the large bevel gear 41 rotates, the claws 42 are moved through the spiral groove, so that the claws 42 move inward along the radial direction of the chuck body 40. The necking groove 43 on the claw 42 is pressed against the outer periphery of the pipe 3 to complete the necking process. Since each claw 42 moves synchronously, the uniform pressure on the pipe wall of the pipe 3 is ensured, and uneven force on the pipe wall can be avoided, so that the pipe wall is not partially damaged, and the necking is not failed.

[0038] The linear driver is a pneumatic cylinder or a hydraulic cylinder.

[0039] The above only describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical scheme falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary skilled persons in the art, some improvements and refinements without departing from the principles of the present application shall also be considered as falling within the protection scope of the present application.

Claims

1. A pipe necking device, characterized by, The utility model provides a kind of material feeding mechanism, including substrate (1), which is provided with feeding mechanism (2) and upper clamp (9) on it, longitudinal moving mechanism (4) is installed on feeding mechanism (2), driving connection is carried out to installation plate (5) of longitudinal moving mechanism (4), material taking mechanism is installed on installation plate (5), left and right sides of upper clamp (9) are respectively provided with necking assembly (11) and inner support assembly (12), the linear actuator two (30) of necking assembly (11) is included in upper clamp (9), driving connection is carried out to necking piece (31) of linear actuator two (30), the linear actuator three (32) of inner support assembly (12) is included in upper clamp (9), driving connection is carried out to core rod (33) of linear actuator three (32), and the material taking mechanism includes two fixed seat (6) and mobile seat (7) between two fixed seat (6), and lower clamp (8) is installed on fixed seat (6) and mobile seat (7).

2. A pipe necking device according to claim 1, wherein, Driving seat (7) is moved, and the horizontal moving mechanism (10) is provided on the installation plate (5), which includes screw motor two (16) installed in the installation plate (5), driving connection is carried out to screw two (17) of screw motor two (16), and the mobile seat (7) is installed on screw two (17), and the mobile seat (7) can be moved between the fixed seat (6) on the side close to the necking assembly (11) and the upper part of the installation plate (5).

3. A pipe necking device according to claim 1, wherein, The longitudinal moving mechanism (4) includes screw motor one (13), driving connection is carried out to screw one (14) of screw motor one (13), and screw slide (15) is installed on screw one (14), and the installation plate (5) is fixedly connected with the screw slide (15).

4. The device of claim 1, wherein: The feeding mechanism (2) includes blanking plate (22) and guide plate (23), the blanking plate (22) and the guide plate (23) are arranged in parallel, a plurality of connecting rods (24) are connected between the blanking plate (22) and the guide plate (23), two guide rails (25) are connected to one side of the blanking plate (22) close to the upper clamp (9), the guide rails (25) are located at the left and right ends close to the blanking plate (22), one end of the guide rail (25) close to the upper clamp (9) is connected with a positioning block (26), and the first material blocking part and the second material blocking part are arranged on the blanking plate (22) and the guide plate (23) respectively, and the first material blocking part is arranged closer to the upper clamp (9) than the second material blocking part.

5. A pipe necking device according to claim 4, wherein, The first material blocking part includes a plurality of linear actuators five (28), the linear actuators five (28) are installed on one end of the blanking plate (22) close to the upper clamp (9), driving connection is carried out to the stop block (29) of linear actuators five (28), and the upper end of the stop block (29) can exceed the upper surface of the blanking plate (22).

6. A pipe necking device according to claim 5, wherein, The second material blocking piece comprises two linear actuators four (34) arranged on the left and right sides of the upper part of the guide plate (23), the linear actuators four (34) are drivingly connected with a clamping strip (35), and the end of the clamping strip (35) can extend into the pipe (3).

7. The device of claim 1, wherein: The upper clamping piece (9) comprises a support frame (20) and an upper clamping block (21) mounted on the support frame (20), the lower part of the upper clamping block (21) is provided with a clamping groove (36), the lower clamping piece (8) comprises a linear actuator one (18), the linear actuator one (18) is drivingly connected with a lower clamping block (19), and the upper part of the lower clamping block (19) is provided with a support groove (37).

8. A pipe necking device according to claim 7, wherein, The upper part of the lower clamping block (19) is provided with a positioning groove (38), the positioning groove (38) is provided with two rows and is located on the front and rear sides of the support groove (37), and the lower part of the upper clamping block (21) is provided with a positioning strip (39) which can be clamped into the positioning groove (38).

9. The device of claim 1, wherein: The necking assembly (11) comprises a linear actuator two (30) mounted on the support frame (20), the linear actuator two (30) is drivingly connected with a necking piece (31), the necking piece (31) comprises a chuck body (40), a large bevel gear (41) and four clamping jaws (42), the inner end of the clamping jaw (42) is provided with a necking groove (43), the large bevel gear (41) is rotatably arranged in the chuck body (40), one side of the large bevel gear (41) facing the clamping jaw (42) is provided with a spiral groove, the clamping jaw (42) is matched with the spiral groove on the large bevel gear (41), the side surface of the chuck body (40) is mounted with a servo motor (46), the servo motor (46) is drivingly connected with a small bevel gear, the small bevel gear is engaged with the large bevel gear (41), the end surface of the chuck body (40) is provided with a guide groove (44), the guide groove (44) is arranged along the radial direction of the chuck body (40), the clamping jaw (42) comprises a guide block (45), the guide block (45) is arranged in the guide groove (44) and can move along the guide groove (44).

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