Pipe fitting cold press forming die

Abstract

The pipe fitting cold press forming die comprises a lower die base, guide columns are fixedly connected to the four corners of the upper surface of the lower die base, a top plate is jointly and fixedly connected to the top ends of the four guide columns, a hydraulic machine is fixedly connected to the bottom of the top plate, an upper die base is fixedly connected to the bottom end of the hydraulic machine, and a punch is fixedly connected to the bottom of the upper die base. The pipe cold press forming device has the beneficial effects that by arranging the jacking mechanism, a pipe can be jacked out and discharged after being subjected to cold press forming, meanwhile, when the pipe is extruded, all force borne by the pipe acts on a jacking plate and a rack plate, the bottom of the rack plate makes contact with the bottom end of an inner cavity of a jacking groove, and therefore the jacking plate, the rack plate and a female die form a whole; and meanwhile, it can be guaranteed that the jacking plate is attached to the bottom of an inner cavity of the mold cavity, and then the precision of the formed pipe fitting is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of cold pressing forming dies, in particular to a cold pressing forming die for a pipe fitting. Background Art

[0002] The cold forming die for pipe fittings is a key tool used to form pipe fittings in a cold state. The cold forming die refers to a processing tool that applies pressure to the pipe fittings through the die in a cold state to cause plastic deformation, thereby obtaining parts with the required shape, size and mechanical properties.

[0003] 1. A surface texture cold pressing forming mold (publication number: CN219786353U), comprising a mold body, a lower mold base is installed at the bottom of the mold body, a lower forming seat is installed on the top of the lower mold base, a mold groove is opened inside the lower forming seat, a push plate is arranged at the lower end of the upper end of the mold groove, a spring shock absorber is installed at the bottom of the push plate, an electric telescopic rod is installed at the bottom of the middle spring shock absorber, and telescopic rods are installed at the bottom of the left and right spring shock absorbers, and a fixed seat is connected to the bottom of the telescopic rod. In the utility model, a surface texture cold pressing forming mold is set up, and the electric telescopic rod and push plate in the device can be used to push the formed material, thereby facilitating the demolding operation of the formed material and solving the problem of inconvenient material removal.

[0004] 2. A metal pipe cold extrusion forming die and its processing method (publication number: CN112191701A), including a male die assembly and a female die assembly, the female die assembly is provided with a positioning ejection assembly and a pad assembly, the positioning ejection assembly includes a positioning mandrel and an ejection sleeve, the upper end of the ejection sleeve extends into the mold cavity and corresponds to the lower end of the tubular workpiece, the pad assembly includes a fixed pad and a floating pad, the floating pad is arranged above the fixed pad through an elastic component, and a floating gap is provided between the female die assembly and the fixed pad for the floating pad to move up and down. The present invention utilizes the die structure design, when the metal pipe is subjected to tooth extrusion processing, the metal pipe workpiece is firstly subjected to forward extrusion, and after the metal pipe workpiece is deformed and offset with the ejection sleeve, the metal pipe workpiece is subjected to bidirectional extrusion, the processed metal pipe workpiece has good tooth profile consistency, high product yield, and longer die service life.

[0005] After the cold forming mold for pipe fittings is processed, it is generally necessary to eject the pipe fittings. In the prior art, the ejection and unloading method generally uses an electric telescopic rod and a top plate to eject the pipe fittings.

[0006] Therefore, a pipe cold forming die is proposed to solve the above problems. Summary of the invention

[0007] In order to make up for the shortcomings of the prior art, which is prone to damage due to the pressure of a hydraulic press, the present invention provides a cold pressing forming die for a pipe fitting.

[0008] The technical solution adopted by the present invention to solve the technical problem is: a pipe cold pressing forming mold, including a lower die base, the upper surface of the lower die base is fixedly connected with guide columns at four corners, the top ends of the four guide columns are commonly fixedly connected with a top plate, the bottom of the top plate is fixedly connected with a hydraulic press, the bottom end of the hydraulic press is fixedly connected with an upper die base, the bottom of the upper die base is fixedly connected with a punch, the top of the lower die base is fixedly connected with a die, the upper surface of the die is provided with a die cavity, the inside of the die is provided with a material ejecting mechanism, and both sides of the upper surface of the die are provided with fixing mechanisms;

[0009] The ejection mechanism includes an ejection groove, which is opened at the inner bottom end of the mold cavity. The inner cavity of the ejection groove is provided with a lifting plate, a rack plate and a gear. The rack plate and the gear are meshingly connected. A rotating rod is fixedly sleeved inside the gear. The rotating rod and the die are rotatably connected. A micro motor is fixedly connected to one side of the die, and the output end of the micro motor is fixedly connected to one end of the rotating rod.

[0010] The fixing mechanism comprises two positioning plates, both of which are fixedly connected to the top of the concave mold, and opposite sides of the two positioning plates are fixedly connected with springs, and one end of the spring is fixedly connected with a clamping plate.

[0011] The bottom thread of the rack plate is sleeved with bolts, and the rack plate is detachably connected to the jacking plate through the bolts. The depth of the ejection groove is the sum of the heights of the jacking plate and the rack plate.

[0012] The inner bottom end of the mold cavity is provided with two arc-shaped grooves, and the inner part of the arc-shaped groove is movably sleeved with an arc-shaped plate, and the two arc-shaped plates are respectively fixedly connected to the two sides of the lifting plate.

[0013] A positioning bolt is threadedly sleeved on one side of the die, a limiting sliding groove is provided on one side of the rack plate, and the bottom of the positioning bolt passes through the interior of the limiting sliding groove.

[0014] A thread groove is provided on one side of the concave die, the positioning bolt is threadably sleeved inside the thread groove, and the bottom of the positioning bolt contacts the side wall of the limiting sliding groove.

[0015] The bottom of the clamping plate contacts the top of the concave die, and the top of the clamping plate is configured to be arc-shaped.

[0016] The cooling device includes a box body, a pipe conveying roller mechanism and a pipe cutting knife mechanism, wherein the pipe conveying roller mechanism and the pipe cutting knife mechanism are both arranged in the box body, the pipe cutting knife mechanism is arranged at one end of the pipe conveying roller mechanism, a guide plate is arranged between the other end of the pipe conveying roller mechanism and the die, and a spray cooling mechanism is arranged on the upper part of the pipe conveying roller mechanism.

[0017] The spray cooling mechanism is provided with a plurality of spray heads, and the plurality of spray heads are connected to a water inlet pipe. A water collecting tank is provided at the bottom of the box body, and the water collecting tank is externally connected to a drainage pipe.

[0018] The pipe cutting knife mechanism comprises a bracket and a cutting electric cylinder. The cutting electric cylinder is installed on the bracket, and a cutting knife is fixed at the output end of the cutting electric cylinder.

[0019] The present invention is beneficial in that:

[0020] 1. The present invention provides a material ejection mechanism, which can eject and discharge the pipe fittings after cold-pressing. At the same time, when the pipe fittings are squeezed, all the forces on the pipe fittings act on the ejection plate and the rack plate, and the bottom of the rack plate contacts the bottom end of the inner cavity of the ejection groove, so that the ejection plate, the rack plate and the concave die form a whole, avoiding the influence on the gear, the rotating rod and the micro motor, and at the same time ensuring that the ejection plate fits the bottom of the inner cavity of the mold cavity, thereby ensuring the accuracy of the pipe fitting after being formed;

[0021] 2. The present invention provides a fixing mechanism, so that when placing the pipe fitting, the pipe fitting can be placed on the inner side of the two clamping plates, and the pipe fitting can be quickly fixed by the restoring force of the spring. At the same time, the fixing method is elastic, so when the pipe fitting is pressurized to form, interference with the forming operation caused by clamping at both ends of the pipe fitting can be avoided.

[0022] 3. The present invention provides a cooling device, and the spray cooling mechanism of the cooling device can cool the pipe fittings. The pipe fitting cutting knife mechanism first cuts the pipe fittings into sections, and then cools the pipe fittings on the pipe fitting conveying roller mechanism. After cooling, the pipe fittings enter the groove through the guide plate for cold pressing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a structural diagram of the lower die base of the present invention;

[0026] Figure 3 It is a schematic diagram of the main cross-sectional structure of the present invention;

[0027] Figure 4 For the present invention Figure 2 Schematic diagram of the structure at A in the middle;

[0028] Figure 5 It is a schematic diagram of the cross-sectional structure of the concave mold of the present invention;

[0029] Figure 6 For the present invention Figure 4 Schematic diagram of the structure at B in the middle;

[0030] Figure 7 It is a schematic diagram of the side view structure of the concave mold of the present invention;

[0031] Figure 8 For the present invention Figure 6 The structural diagram at C in the middle;

[0032] Fig. 9 It is a structural diagram of the cooling device of the present invention;

[0033] Fig.10 It is a side view of the pipe conveying roller mechanism of the present invention;

[0034] Fig.11 It is a structural diagram of the pipe cutting knife mechanism of the present invention.

[0035] Reference numerals in the figure: 1, lower die base; 11, guide column; 12, ejector plate; 13, hydraulic press; 14, upper die base; 15, punch; 16, die; 17, die cavity; 2, ejector mechanism; 21, ejector groove; 22, ejector plate; 23, rack plate; 24, gear; 25, rotating rod; 26, micro motor; 27, arc groove; 28, arc plate; 29, bolt; 210, positioning bolt; 211, limit slide groove; 212, Thread groove; 3. Fixing mechanism; 31. Positioning plate; 32. Spring; 33. Clamping plate; 4. Cooling device; 401. Box; 402. Pipe conveying roller mechanism; 403. Pipe cutting knife mechanism; 404. Spray cooling mechanism; 405. Guide plate; 406. Spray head; 407. Water inlet pipe; 408. Water collecting trough; 409. Drain pipe; 410. Bracket; 411. Cutting electric cylinder; 412. Cutting knife; 5. Pipe. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0039] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0040] The following is combined with Figures 1 to 11 The present application is further described in detail as shown.

[0041] The present application embodiment discloses a pipe cold forming die. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7A pipe cold forming mold comprises a lower die base 1, wherein the four corners of the upper surface of the lower die base 1 are fixedly connected with guide columns 11, the top ends of the four guide columns 11 are commonly fixedly connected with a top plate 12, the bottom of the top plate 12 is fixedly connected with a hydraulic press 13, the bottom end of the hydraulic press 13 is fixedly connected with an upper die base 14, the bottom of the upper die base 14 is fixedly connected with a punch 15, the top of the lower die base 1 is fixedly connected with a die 16, the upper surface of the die 16 is provided with a die cavity 17, the interior of the die 16 is provided with a material ejection mechanism 2, and both sides of the upper surface of the die 16 are provided with fixing mechanisms 3; by providing the material ejection mechanism 2, it is convenient to unload the pipe after cold forming, and by providing the fixing mechanism 3, the pipe can be limited after being placed, and at the same time, by elastic limiting, interference caused by applying pressure to the pipe can be avoided;

[0042] The ejection mechanism 2 includes an ejection groove 21, which is opened at the inner bottom end of the mold cavity 17. The inner cavity of the ejection groove 21 is provided with a lifting plate 22, a rack plate 23 and a gear 24. The rack plate 23 and the gear 24 are meshingly connected. A rotating rod 25 is fixedly sleeved inside the gear 24. The rotating rod 25 and the die 16 are rotatably connected. A micro motor 26 is fixedly connected to one side of the die 16. The output end of the micro motor 26 is fixedly connected to one end of the rotating rod 25. When unloading is required, the micro motor 26 is turned on to drive the rotating rod 25 to rotate, and then under the connection of the gear 24, the rack plate 23 and the ejection plate 22 can move upward, so that the pipe fittings in the mold cavity 17 can be ejected to complete the unloading.

[0043] Reference Figure 6 and Figure 7 The fixing mechanism 3 includes two positioning plates 31, and the two positioning plates 31 are fixedly connected to the top of the die 16. The opposite sides of the two positioning plates 31 are fixedly connected with springs 32, and one end of the spring 32 is fixedly connected with a clamping plate 33. When placing the pipe fitting, by placing the pipe fitting on the inner side of the two clamping plates 33, the elastic force of the spring 32 can achieve quick fixation of the pipe fitting.

[0044] Reference Figure 3 The bottom thread of the rack plate 23 is connected with a bolt 29, and the rack plate 23 is detachably connected to the lifting plate 22 through the bolt 29, which is convenient for disassembling and replacing the lifting plate 22 or the rack plate 23. The depth value of the ejection groove 21 is the sum of the height values ​​of the lifting plate 22 and the rack plate 23. When pressure is applied to the pipe fitting, the bottom of the rack plate 23 contacts the bottom end of the inner cavity of the ejection groove 21, which can ensure that the lifting plate 22 fits the bottom of the inner cavity of the mold cavity 17, thereby ensuring the accuracy of the pipe fitting after forming.

[0045] Reference Figure 3 and Figure 5A positioning bolt 210 is threadedly sleeved on one side of the die 16, and a limiting slide groove 211 is provided on one side of the rack plate 23. The bottom of the positioning bolt 210 passes through the interior of the limiting slide groove 211. A threaded groove 212 is provided on one side of the die 16. The positioning bolt 210 is threadedly sleeved on the interior of the threaded groove 212. The bottom of the positioning bolt 210 contacts the side wall of the limiting slide groove 211. By setting the positioning bolt 210, when the rack plate 23 moves upward, the positioning bolt 210 can slide in the limiting slide groove 211, which can play a limiting role and prevent the rack plate 23 from detaching from the inside of the ejection groove 21.

[0046] The cooling device 4 includes a box body 401, a pipe conveying roller mechanism 402 and a pipe cutting knife mechanism 403. The pipe conveying roller mechanism 402 and the pipe cutting knife mechanism 403 are both arranged in the box body 401. The pipe cutting knife mechanism 403 is arranged at one end of the pipe conveying roller mechanism 402. A guide plate 405 is arranged between the other end of the pipe conveying roller mechanism 402 and the die 16. A spray cooling mechanism 404 is arranged on the upper part of the pipe conveying roller mechanism 402.

[0047] The spray cooling mechanism 404 is provided with a plurality of spray heads 406, and the plurality of spray heads 406 are connected to a water inlet pipe 407. A water collecting tank 408 is provided at the bottom of the box body 401, and the water collecting tank 408 is externally connected to a drainage pipe 409. The water inlet pipe 407 is externally connected to a water pump and a cold water tank, and the plurality of spray heads 406 below the spray cooling mechanism 404 spray cool the pipe 5.

[0048] The pipe cutting knife mechanism 403 includes a bracket 410 and a cutting electric cylinder 411 . The cutting electric cylinder 411 is installed on the bracket 410 , and a cutting knife 412 is fixed to the output end of the cutting electric cylinder 411 .

[0049] Working principle: When cold-pressing the pipe fitting, first clamp the two ends of the pipe fitting on the inner side of the two clamping plates 33 respectively and fix them by the spring 32; then turn on the hydraulic press 13 to drive the upper die seat 14 to move downward, and the punch 15 contacts and squeezes the pipe fitting downward, so that the pipe fitting can be bent to the inner wall of the mold cavity 17 and formed; when the pipe fitting is formed, the hydraulic press 13 drives the upper die seat 14 to move upward to the initial position, and then turn on the micro motor 26 to drive the rotating rod 25 to rotate, and then under the connection of the gear 24, the rack plate 23 and the lifting plate 22 can be moved upward, so that the pipe fitting in the mold cavity 17 can be ejected to complete the unloading. In addition, because when the pipe fitting is squeezed, the force on the pipe fitting acts entirely on the lifting plate 22 and the rack plate 23, and does not affect the gear 24, the rotating rod 25 and the micro motor 26, so the service life of the gear 24, the rotating rod 25 and the micro motor 26 can be greatly increased.

[0050] The bottom of the clamping plate 33 contacts the top of the die 16 , and the top of the clamping plate 33 is arranged in an arc shape. By setting the top of the clamping plate 33 in an arc shape, it is convenient to quickly clamp the pipe fitting into the inner side of the two clamping plates 33 for fixation.

[0051] Two arc-shaped grooves 27 are provided at the inner bottom end of the mold cavity 17, and an arc-shaped plate 28 is movably sleeved inside the arc-shaped groove 27. The two arc-shaped plates 28 are respectively fixedly connected to the two sides of the lifting plate 22. By providing two arc-shaped plates 28, the contact area with the pipe fitting can be increased when the pipe fitting is ejected, thereby facilitating the ejection of the pipe fitting.

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A pipe cold forming die, characterized in that: The invention comprises a lower die base (1) and a cooling device (4), wherein the cooling device (4) is arranged on the side of the lower die base (1), the upper surface of the lower die base (1) is fixedly connected with guide columns (11) at four corners, the top ends of the four guide columns (11) are commonly fixedly connected with a top plate (12), the bottom of the top plate (12) is fixedly connected with a hydraulic press (13), the bottom end of the hydraulic press (13) is fixedly connected with an upper die base (14), the bottom of the upper die base (14) is fixedly connected with a punch (15), the top of the lower die base (1) is fixedly connected with a die (16), the upper surface of the die (16) is provided with a die cavity (17), a material ejection mechanism (2) is arranged inside the die (16), and fixing mechanisms (3) are arranged on both sides of the upper surface of the die (16); The ejection mechanism (2) comprises an ejection groove (21), the ejection groove (21) is opened at the inner bottom end of the mold cavity (17), the inner cavity of the ejection groove (21) is provided with an ejection plate (22), a rack plate (23) and a gear (24), the rack plate (23) and the gear (24) are meshingly connected, a rotating rod (25) is fixedly sleeved inside the gear (24), the rotating rod (25) and the die (16) are rotatably connected, a micro motor (26) is fixedly connected to one side of the die (16), and an output end of the micro motor (26) is fixedly connected to one end of the rotating rod (25).

2. A pipe cold forming die as claimed in claim 1, characterized in that: The fixing mechanism (3) comprises two positioning plates (31), and the two positioning plates (31) are fixedly connected to the top of the die (16); springs (32) are fixedly connected to the opposite sides of the two positioning plates (31), and one end of the spring (32) is fixedly connected to a clamping plate (33).

3. A pipe cold forming die according to claim 1, characterized in that: The bottom thread of the rack plate (23) is sleeved with a bolt (29), and the rack plate (23) is detachably connected to the lifting plate (22) via the bolt (29).

4. A pipe cold forming die as claimed in claim 1, characterized in that: The depth of the ejection groove (21) is the sum of the heights of the ejection plate (22) and the rack plate (23).

5. A pipe cold forming die as claimed in claim 1, characterized in that: The inner bottom end of the mold cavity (17) is provided with two arc-shaped grooves (27), and an arc-shaped plate (28) is movably sleeved inside the arc-shaped groove (27); the two arc-shaped plates (28) are respectively fixedly connected to two sides of the lifting plate (22).

6. A pipe cold forming die according to claim 1, characterized in that: A positioning bolt (210) is threadedly sleeved on one side of the die (16); a limiting sliding groove (211) is provided on one side of the rack plate (23); the bottom of the positioning bolt (210) penetrates the interior of the limiting sliding groove (211); a threaded groove (212) is provided on one side of the die (16); the positioning bolt (210) is threadedly sleeved on the interior of the threaded groove (212); the bottom of the positioning bolt (210) contacts the side wall of the limiting sliding groove (211).

7. A pipe cold forming die as claimed in claim 3, characterized in that: The bottom of the clamping plate (33) contacts the top of the concave die (16), and the top of the clamping plate (33) is arranged in an arc shape.

8. A pipe cold forming die as claimed in claim 3, characterized in that: The cooling device (4) comprises a box body (401), a pipe conveying roller mechanism (402) and a pipe cutting knife mechanism (403); the pipe conveying roller mechanism (402) and the pipe cutting knife mechanism (403) are both arranged in the box body (401); the pipe cutting knife mechanism (403) is arranged at one end of the pipe conveying roller mechanism (402); a guide plate (405) is arranged between the other end of the pipe conveying roller mechanism (402) and the die (16); and a spray cooling mechanism (404) is arranged on the upper part of the pipe conveying roller mechanism (402).

9. A pipe cold forming die as claimed in claim 3, characterized in that: The spray cooling mechanism (404) is provided with a plurality of spray heads (406), the plurality of spray heads (406) are connected to a water inlet pipe (407), a water collecting tank (408) is provided at the bottom of the box body (401), the water collecting tank (408) is externally connected to a drainage pipe (409), and the water inlet pipe (407) is externally connected to a water pump and a cold water tank; the pipe cutting knife mechanism (403) comprises a bracket (410) and a cutting electric cylinder (411), the cutting electric cylinder (411) is mounted on the bracket (410), and a cutting knife (412) is fixed to the output end of the cutting electric cylinder (411).

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