Pipe fitting forming die

Abstract

The utility model discloses a pipe fitting forming die, which relates to the technical field of pipe fitting forming dies, and comprises a core rod, a side pushing cylinder, an upper die, a lower die and a fixing plate, the upper die and the lower die are used for fixing a blank pipe, the fixing plate is used for fixing the upper die and the lower die, the side pushing cylinder is arranged on one side of the upper die and the lower die, is connected with the fixing plate and is provided with a movable ejector rod, and one end of the core rod is pressed by the fixing plate. The core rod comprises a shell, a fixing ring and a plurality of movable male dies, a channel allowing the ejector rod to enter is reserved in the shell, the fixing ring and the movable male dies are arranged in the channel, the movable male dies are connected with the fixing ring in a sliding mode, and a plurality of strip-shaped holes matched with the movable male dies penetrate through the shell in the circumferential direction. When the movable male die slides to the position of the strip-shaped hole along the fixing ring, the protrusion on the movable male die can penetrate out of the strip-shaped hole. The small-pipe-diameter outer protrusion forming device can achieve forming of small-pipe-diameter outer protrusions, is high in forming efficiency and high in equipment universality, and can be used for production and machining through common pressing machines.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipe fitting forming die technical field, specifically a pipe fitting forming die. BACKGROUND

[0002] In actual engineering, the tubular part of the convex is more difficult to form. Generally, high-pressure liquid is filled in the inside to act as a convex die, and the outside cavity acts as a concave die to form. This forming method needs a high-pressure injection device, and the device is expensive. Because of the need for internal liquid filling, the production rhythm is slow, and it is generally used for large pipe diameter products. Based on this, a pipe fitting forming die is designed, which can realize the convex forming of some small pipe diameters, has high forming efficiency, and has strong device versatility. Ordinary presses can be used for production and processing. UTILITY MODEL CONTENTS

[0003] The utility model discloses a pipe fitting forming die, which is beneficial to the forming of small pipe fittings, has lower equipment value, good versatility, saves more than 50% of the price of the die, and improves the production efficiency by more than 30% compared with the internal liquid pressure forming of the pipe fitting.

[0004] The utility model discloses a pipe fitting forming die, which is beneficial to the forming of small pipe fittings, has lower equipment value, good versatility, saves more than 50% of the price of the die, and improves the production efficiency by more than 30% compared with the internal liquid pressure forming of the pipe fitting.

[0005] The shell includes an upper shell and a lower shell, and the upper shell and the lower shell are respectively circumferentially penetrated by the strip-shaped holes matched with the movable convex dies.

[0006] The movable convex die is provided with a sliding groove, the fixed ring is provided with a sliding protrusion, the sliding groove and the sliding protrusion are slidably connected, so that the movable convex die can slide along the sliding protrusion.

[0007] The upper and lower molds include an upper mold and a lower mold, the fixed plate includes an upper fixed plate and a lower fixed plate, the upper mold is connected with the upper fixed plate, the lower mold is connected with the lower fixed plate, and the positions of the upper mold and the lower mold correspond to each other.

[0008] The bottom of the upper die and the top of the lower die are provided with mutually matched semi-cylindrical grooves, which include two parts, one is a semi-embryo tube groove with the same diameter as the embryo tube, and the other is a semi-outer convex shape groove with the same diameter as the outer convex shape that the staff needs to process the product, and the diameter of the semi-outer convex shape groove is larger than that of the semi-embryo tube groove.

[0009] The top of the lower fixed plate is provided with a supporting block, the bottom of the upper fixed plate is provided with a pressing block, the supporting block and the pressing block are arranged between the upper and lower dies and the side pushing cylinder, the positions of the supporting block and the pressing block correspond to each other, and one end of the core rod is pressed by the pressing block and the supporting block.

[0010] The top of the supporting block is provided with a movable first floating block, and the inside of the supporting block is provided with a nitrogen gas spring, and the top end of the nitrogen gas spring is connected with the bottom of the first floating block.

[0011] The lower side of the pressing block is provided with a second floating block, and the second floating block is fixed with the pressing block through bolts.

[0012] The side pushing cylinder comprises a cylinder body and a movable piston rod, the piston rod is connected with the top rod, and the inside of the cylinder body is provided with a gas or liquid to push the piston rod, so that the piston rod can move back and forth along the cylinder body.

[0013] The utility model discloses a small pipe fitting forming, compared with the liquid pressure forming of pipe fitting inside, the equipment value of using is low, and the generality is good, and the die price is saved by more than 50%, and the production efficiency is improved by more than 30%. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structure schematic drawing of the utility model;

[0015] Figure 2 It is the structure schematic drawing of the core rod and the top rod;

[0016] Figure 3 It is the structure schematic drawing of the fixed ring and the movable convex die;

[0017] When the movable convex die is not opened by the top rod, Figure 4 It is the structure schematic drawing of the fixed ring and four movable convex dies;

[0018] Figure 5 It is the sectional structure schematic drawing of Figure 4 ;

[0019] When the movable convex die is opened by the top rod, Figure 6 It is the structure schematic drawing of the fixed ring and four movable convex dies;

[0020] Figure 7 It is the sectional structure schematic drawing of Figure 6 ;

[0021] Figure 8 The structure diagram of the finished product is shown in the figure;

[0022] In the figure: 1-core rod, 2-upper die, 3-lower die, 4-side pushing cylinder, 5-ejector pin, 6-movable punch, 7-supporting block, 8-pressing block, 9-first floating block, 10-nitrogen spring, 11-upper fixed plate, 12-lower fixed plate, 13-second floating block, 14-strip-shaped hole, 21-fixed ring, 22-sliding groove, 23-sliding protrusion, 24-upper shell, 25-lower shell. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0024] The present application will be further described below in combination with the drawings and specific embodiments.

[0025] In an embodiment of the present application:

[0026] As Figures 1 to 8As shown, a pipe forming die, the die comprises a core rod 1, a side pushing cylinder 4, upper and lower molds for fixing the blank pipe and a fixing plate for fixing the upper and lower molds, the fixing plate is fixed on the machine tool, the fixing plate is moved by the machine tool, the side pushing cylinder 4 is arranged on one side of the upper and lower molds and connected with the fixing plate, the side pushing cylinder 4 is provided with a movable solid top rod 5, one end of the core rod 1 is pressed by the fixing plate, the other end is inserted into the blank pipe, the core rod 1 comprises a shell, a fixed ring 21 and four movable protruding molds 6, the shell is internally provided with a channel through which the top rod 5 can enter, the fixed ring 21 and the four movable protruding molds 6 are arranged in the channel, the four movable protruding molds 6 are respectively slidably connected with the fixed ring 21, the shell is circumferentially provided with four strip-shaped holes 14 matched with the movable protruding molds 6, when the movable protruding mold 6 slides along the fixed ring 21 to the position of the strip-shaped hole 14, the protrusion on the movable protruding mold 6 can penetrate out of the strip-shaped hole 14, the movable protruding mold 6 is made of Cr12MoV material and has a hardness of HRC58-62 after quenching, the core rod 1 is made of 65Mn material and has a hardness of HRC45-50 after quenching, and the top rod 5 is made of 40Cr material and has a hardness of HRC45-50 after quenching.

[0027] The shell comprises an upper shell 24 and a lower shell 25, the upper shell 24 and the lower shell 25 are respectively circumferentially provided with two strip-shaped holes 14 matched with the movable protruding mold 6.

[0028] The movable protruding mold 6 is provided with a sliding groove 22, the fixed ring 21 is provided with a sliding protrusion 23, and the sliding groove 22 and the sliding protrusion 23 are slidably connected.

[0029] The upper and lower molds comprise an upper mold 2 and a lower mold 3, the fixing plate comprises an upper fixing plate 11 and a lower fixing plate 12, the upper mold 2 is fixedly connected with the upper fixing plate 11, the lower mold 3 is fixedly connected with the lower fixing plate 12, and the position of the upper mold 2 corresponds to the position of the lower mold 3.

[0030] The bottom of the upper mold 2 and the top of the lower mold 3 are provided with semicylindrical grooves matched with each other, two semicylindrical grooves cooperate to form a cylindrical groove, the cylindrical groove comprises two parts, one part is a blank pipe groove with the same diameter as the blank pipe, and the other part is an outer convex shape groove with the same diameter as the outer convex shape of the product to be processed by the staff, the diameter of the outer convex shape groove is larger than the diameter of the blank pipe groove.

[0031] The top of the lower fixing plate 12 is provided with a supporting block 7, and the bottom of the upper fixing plate 11 is provided with a pressing block 8, the supporting block 7 and the pressing block 8 are arranged between the upper and lower molds and the side pushing cylinder 4, and the position of the supporting block 7 corresponds to the position of the pressing block 8, one end of the core rod 1 is pressed by the pressing block 8 and the supporting block 7.

[0032] The top of the support block 7 is provided with a movable first floating block 9, the inside of the support block 7 is provided with a nitrogen spring 10, the top end of the nitrogen spring 10 is fixedly connected with the bottom of the first floating block 9, the bottom end of the nitrogen spring 10 is in contact with or fixedly connected with the bottom inside of the support block 7, the nitrogen spring 10 is in a compressed state, the first floating block 9 is made of 45# material and has a hardness of HRC 28-32 after being quenched.

[0033] The lower side of the pressing block 8 is provided with a second floating block 13, and the second floating block 13 is fixedly connected with the pressing block 8 through bolts.

[0034] The side pushing cylinder 4 comprises a cylinder body and a movable piston rod, the piston rod is connected with the top rod 5, and the front end of the top rod 5 is provided in a conical shape.

[0035] The movable convex dies 6 are designed according to the outer convex shape of the product processed by the staff, and the number and shape of the strip-shaped holes 14 on the core rod 1 are designed according to the number and shape of the movable convex dies 6. First, the embryo tube to be processed is sleeved outside the shell of the core rod 1, then the upper fixed plate 11 with the upper die 2 starts to press downward until the upper die 2 contacts the lower die 3 to perform die closing and press the embryo tube, at the same time, the pressing block 8 also presses downward with the upper fixed plate 11, the second floating block 13 contacts the top of the core rod 1, the first floating block 9 contacts the bottom of the core rod 1 under the top force of the nitrogen spring 10, and the core rod 1 is pressed tightly, and the side pushing cylinder 4 starts to work, the cylinder body inside is pushed by gas or liquid to drive the piston rod, the piston rod drives the top rod 5 to move leftward, the top rod 5 penetrates through the channel in the shell from the inside of the fixed ring 21, and the four movable convex dies 6 are pushed open (i.e. outwardly expanded), the four movable convex dies 6 slide outwardly along the four sliding protrusions 23 of the fixed ring 21 respectively until sliding to the strip-shaped holes 14, not only the strip-shaped holes 14 are filled, but also the protrusions on the movable convex dies 6 penetrate through the strip-shaped holes 14, the embryo tube is expanded outwardly, the part of the embryo tube that is in contact with the strip-shaped holes 14 is convex outwardly, the forming of the outer convex shape is completed, after the forming, the piston rod drives the top rod 5 to move rightward, the core rod 1 is withdrawn, the upper fixed plate 11 with the upper die 2 and the pressing block 8 moves upward, the product after processing and the core rod 1 are loosened, and the product after processing is taken out. According to the different positions of the outer convex shape required by the staff, the embryo tube is sleeved on the core rod 1 in different positions.

[0036] The above description is only the implementation manner of the utility model, and it should be understood that the utility model is not limited to the form disclosed in the present text, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the concept described in the present text through the above teaching or related technical or knowledge. The changes and variations made by the person skilled in the art should be within the protection scope of the claims attached to the utility model.

Claims

1. A pipe forming die characterized by: The application relates to a core rod (1), a side pushing cylinder (4), upper and lower molds for fixing an embryo tube, and a fixing plate for fixing the upper and lower molds, wherein the side pushing cylinder (4) is arranged at one side of the upper and lower molds and is connected with the fixing plate; the side pushing cylinder (4) is provided with movable top rods (5); one end of the core rod (1) is pressed by the fixing plate, and the other end is inserted into the embryo tube; the core rod (1) comprises a shell, a fixing ring (21) and a plurality of movable protruding molds (6); a channel for allowing the top rods (5) to enter is left in the shell; the fixing ring (21) and the plurality of movable protruding molds (6) are arranged in the channel; the plurality of movable protruding molds (6) are respectively connected with the fixing ring (21) in a sliding mode; a plurality of strip-shaped holes (14) are arranged in the shell in a circumferential direction and are matched with the movable protruding molds (6); when the movable protruding molds (6) slide along the fixing ring (21) to the positions of the strip-shaped holes (14), protrusions on the movable protruding molds (6) can penetrate out of the strip-shaped holes (14).

2. A pipe forming die according to claim 1, wherein: The shell comprises an upper shell (24) and a lower shell (25).

3. A pipe forming die according to claim 1, wherein: The movable protruding mold (6) is provided with a sliding groove (22), and the fixing ring (21) is provided with a sliding protrusion (23); the sliding groove (22) is connected with the sliding protrusion (23) in a sliding mode.

4. A pipe forming die according to claim 1, wherein: The upper and lower molds comprise an upper mold (2) and a lower mold (3); the fixing plate comprises an upper fixing plate (11) and a lower fixing plate (12); the upper mold (2) is connected with the upper fixing plate (11); the lower mold (3) is connected with the lower fixing plate (12); and the position of the upper mold (2) corresponds to the position of the lower mold (3).

5. A pipe forming die according to claim 4, wherein: The bottom of the upper mold (2) and the top of the lower mold (3) are provided with semicylindrical grooves matched with each other.

6. A pipe forming die according to any one of claims 4-5, characterized in that: The top of the lower fixing plate (12) is provided with a supporting block (7), and the bottom of the upper fixing plate (11) is provided with a pressing block (8); the supporting block (7) and the pressing block (8) are arranged between the upper and lower molds and the side pushing cylinder (4); the position of the supporting block (7) corresponds to the position of the pressing block (8); and one end of the core rod (1) is pressed by the pressing block (8) and the supporting block (7).

7. A pipe forming die according to claim 6, wherein: The top of the supporting block (7) is provided with a movable first floating block (9), and the inside of the supporting block (7) is provided with a nitrogen spring (10); the top end of the nitrogen spring (10) is connected with the bottom of the first floating block (9).

8. A pipe forming die according to claim 6, wherein: The lower side of the pressing block (8) is provided with a second floating block (13); the second floating block (13) is fixed with the pressing block (8) through bolts.

9. A pipe forming die according to claim 1, wherein: The side pushing cylinder (4) comprises a cylinder body and a movable piston rod; the piston rod is connected with the top rod (5).

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