Elbow cold pushing machine capable of rapidly replacing mold

Abstract

The utility model discloses an elbow cold pushing machine with a mold capable of being rapidly replaced, and belongs to the field of elbow cold pushing machines. Comprising a machine table, an elbow push rod fixedly installed on the machine table, a core head installed at the movable end of the elbow push rod, a cavity mold placed on the side, corresponding to the movable end of the elbow push rod, of the machine table, and a pressing mechanism fixedly arranged at the position, corresponding to the upper portion of the cavity mold, of the machine table. A longitudinally-moving positioning table and a lifting push rod are arranged at the position, corresponding to the lower portion of the cavity mold, of the machine table, wherein the lifting push rod is embedded in the machine table, and the movable end of the lifting push rod is connected with the center of the bottom of the positioning table. According to the elbow cold pushing machine capable of rapidly replacing the die, through the synergistic effect of lifting of the positioning table and the clamping mechanism and the pressing mechanism, rapid fixing and accurate alignment of the bottom die and the top die are achieved, and the problems that a traditional cold pushing machine is low in die replacing efficiency and time-consuming in manual adjustment are solved.

Description

Technical Field

[0001] This application relates to the field of elbow cold pusher technology, specifically an elbow cold pusher with quick mold change. Background Technology

[0002] A cold-bending elbow machine (also known as a cold-bending elbow machine) is a specialized piece of equipment used for processing metal pipes. It uses a cold-bending process to bend pipe blanks into elbows of the desired shape at room temperature. It is mainly used to produce elbows made of stainless steel, alloy steel, carbon steel, and aluminum alloys, and is widely used in petrochemical, shipbuilding, aerospace, and building water supply and drainage industries.

[0003] The existing mold positioning mechanism of cold push elbow machines mostly uses positioning grooves to connect the bottom mold and top mold of the cavity mold, and then locks them with bolts. This requires welding limiting sliders to the top of the top mold and the bottom of the bottom mold. When changing molds, multiple sets of bolts on the bottom mold and top mold must be manually removed and the mold removed before a new mold is installed. After that, the cavity of the mold and the core head on the extrusion rod must be checked. This can only be done manually and continuously, which wastes manpower and time and results in poor mold changing efficiency.

[0004] Therefore, this application provides a quick-change mold bending cold pusher to solve the above problems. Utility Model Content

[0005] This application provides a quick-change mold-changing cold push elbow machine, which aims to solve the problem of low mold-changing efficiency of existing cold push elbow machines mentioned in the background art.

[0006] To achieve the above objectives, this application provides the following technical solution: a quick-change elbow cold pusher, comprising a machine base, an elbow push rod fixedly mounted on the machine base, a core head mounted on the movable end of the elbow push rod, a cavity mold placed on the machine base corresponding to the movable end of the elbow push rod, and a clamping mechanism fixedly disposed on the machine base at a position above the cavity mold. A longitudinally movable positioning platform is provided on the machine base at a position below the cavity mold. A lifting push rod is embedded on the machine base with its movable end connected to the center of the bottom of the positioning platform. A placement groove is provided on the placement groove to accommodate the bottom mold of the cavity mold. Clamping blocks that move closer to or away from the cavity mold are provided on both sides of the placement groove and on the side near the core head. Clamping push rods with movable ends connected to the clamping blocks are fixedly connected to the sides of the positioning platform.

[0007] The clamping mechanism includes a clamping plate that moves longitudinally above the cavity mold and a clamping push rod fixedly mounted on the machine base with its movable end connected to the top of the clamping plate. The clamping plate has four corresponding corner openings with waist-shaped connecting holes. The top of the top mold of the cavity mold is welded with screws for passing through the waist-shaped connecting holes. Each screw has a washer nut screwed onto it, contacting the top surface of the clamping plate to lock the top mold at the bottom of the clamping plate. In this way, the bottom mold can be quickly clamped / released by clamping blocks, and the top mold can be quickly positioned and locked by the clamping plate and waist-shaped holes, significantly reducing bolt disassembly and adjustment time. Combined with the lifting push rod driving the positioning table to rise and fall, the alignment of the mold cavity and the core head can be adjusted. Mold changing can be completed simply by operating the clamping push rod and the clamping push rod, reducing operational difficulty and manpower requirements.

[0008] Preferably, the core head is connected to the elbow push rod via a four-jaw chuck, and the four-jaw chuck is connected to the movable end of the elbow push rod via a flange and bolts.

[0009] Preferably, at least two sets of clamping blocks and clamping push rods are provided on the same side.

[0010] Preferably, each of the four corners of the bottom of the positioning platform is fixedly connected with an auxiliary stabilizing rod that is telescopically connected to the machine platform.

[0011] Preferably, the machine base is fixedly connected to a canopy for supporting the pressing push rod at a position corresponding to the cavity mold.

[0012] Preferably, the depth of the placement groove does not exceed the bottom edge of the cavity of the mold.

[0013] This quick-change elbow cold pusher achieves rapid fixing and precise alignment of the bottom mold and top mold through the coordinated action of the positioning table lifting, clamping mechanism and pressing mechanism, solving the problems of low mold changing efficiency and time-consuming manual adjustment in traditional cold pushers. Attached Figure Description

[0014] Figure 1 A schematic diagram of a quick-change elbow cold pusher;

[0015] Figure 2 A top view of the inner structure of the roof of a quick-change elbow cold pusher;

[0016] Figure 3 This is a top-view truncated structural diagram of a quick-change mold bending cold pusher.

[0017] In the picture:

[0018] 1. Machine base; 11. Lifting push rod; 12. Auxiliary stabilizing rod;

[0019] 2. Positioning platform; 21. Placement slot; 22. Clamping block; 23. Clamping push rod;

[0020] 3. Cavity mold; 31. Bottom mold; 32. Top mold; 321. Screw; 322. Washer nut;

[0021] 4. Elbowed push rod; 5. Four-jaw chuck; 6. Core head;

[0022] 7. Clamping mechanism; 71. Clamping plate; 72. Waist-shaped connecting hole; 73. Clamping push rod. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] This embodiment provides a quick-change mold-changing elbow cold-pushing machine, such as... Figures 1-3 As shown, the quick-change mold bending cold pusher includes a machine base 1, a bending push rod 4 fixedly installed on the machine base 1, a core head 6 installed on the movable end of the bending push rod 4, a cavity mold 3 placed on the machine base 1 corresponding to the movable end of the bending push rod 4, and a clamping mechanism 7 fixedly installed on the machine base 1 at a position above the cavity mold 3. A longitudinally movable positioning platform 2 is provided on the machine base 1 at a position below the cavity mold 3. A lifting push rod 11 is embedded in the machine base 1 and its movable end is connected to the center of the bottom of the positioning platform 2. A placement groove 21 is provided on the placement groove 21 to accommodate the bottom mold 31 of the cavity mold 3. Clamping blocks 22 that move closer to or away from the cavity mold 3 are provided on both sides of the placement groove 21 and on the side near the core head 6. Clamping push rods 23 whose movable ends are connected to the clamping blocks 22 are fixedly connected to the sides of the positioning platform 2.

[0025] The clamping mechanism 7 includes a clamping plate 71 that moves longitudinally above the cavity mold 3 and a clamping push rod 73 that is fixedly installed on the machine base 1 and whose movable end is connected to the top of the clamping plate 71. The clamping plate 71 has waist-shaped connecting holes 72 at the four corners. The top of the top mold 32 of the cavity mold 3 is welded with screws 321 for passing through the waist-shaped connecting holes 72. Each screw 321 is screwed with a washer nut 322 that contacts the top surface of the clamping plate 71 for locking the top mold 32 at the bottom of the clamping plate 71.

[0026] When using the mold, unlock the clamping plate 71 and the old mold top mold 32, then retract the clamping push rod 23, loosen the clamping block 22 to release the old mold, remove it and place the new mold in, extend the clamping push rod 23 to push the new bottom mold from three sides until the fourth side is close to the inner wall of the placement groove 21, thereby achieving four-sided positioning and clamping of the mold. Then, the cavity and core head are corrected by lifting push rod 11 and clamping push rods 23 on both sides. After that, connect the new top mold 32 to the clamping plate 71, weld the screw 321 at the position corresponding to the waist-shaped hole 72 on the top of the corrected top mold 32, the screw 321 passes through the waist-shaped hole 72, adjust the position of the top mold and tighten the nut to complete the fixation of the two. Then the bending operation can be performed.

[0027] Specifically, the core head 6 is connected to the elbow push rod 4 via a four-jaw chuck 5. The four-jaw chuck 5 is connected to the movable end of the elbow push rod 4 via a flange and bolts. The four-jaw chuck 5 is fixed to the movable end of the elbow push rod 4 via a flange and bolts. Its four radially movable jaws open and close synchronously via mechanical or hydraulic drive, thereby clamping the tail of the core head 6. During the pressing process, the core head 6 bears axial thrust and radial bending force. The symmetrical clamping design of the four-jaw chuck can evenly distribute the force and prevent the core head from tilting.

[0028] It should be noted that at least two sets of clamping blocks 22 and clamping push rods 23 are provided on the same side; multiple sets of clamping blocks disperse the clamping force and avoid deformation of the bottom mold caused by single-point force.

[0029] Furthermore, auxiliary stabilizing rods 12 are fixedly connected to the four corners of the bottom of the positioning platform 2 and are telescopically connected to the machine platform 1. The auxiliary stabilizing rods 12 serve as guiding devices to prevent the positioning platform 2 from tilting or shaking during the lifting process, and to ensure that the bottom mold 31 and the top mold 32 are accurately aligned.

[0030] Understandably, a canopy for supporting the pressing push rod 73 is fixedly connected at the position above the cavity mold 3 on the machine base 1; the canopy serves as a fixed fulcrum for the pressing push rod 73, and its rigid structure can withstand the reaction force of the pressing push rod 73.

[0031] It should be noted that the depth of the placement groove 21 does not exceed the bottom edge of the cavity of the cavity mold 3; the depth of the placement groove 21 is designed to be below the bottom edge of the cavity to ensure that after the bottom mold 31 is placed, the entrance plane of the cavity is flush with or slightly higher than the surface of the machine base 1, so as to avoid the tube blank from interfering with the edge of the placement groove 21 during the pressing process.

[0032] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A quick-change elbow cold pusher, comprising a machine base (1), an elbow push rod (4) fixedly mounted on the machine base (1), a core head (6) mounted on the movable end of the elbow push rod (4), a cavity mold (3) placed on the machine base (1) corresponding to the movable end of the elbow push rod (4), and a clamping mechanism (7) fixedly disposed on the machine base (1) at a position above the cavity mold (3), characterized in that: The machine base (1) is provided with a longitudinally movable positioning platform (2) at the position below the cavity mold (3). A lifting push rod (11) is embedded in the machine base (1) and its movable end is connected to the center of the bottom of the positioning platform (2). The placement groove (21) is provided with a placement groove (21) for accommodating the bottom mold (31) of the cavity mold (3). Clamping blocks (22) that move closer to or away from the cavity mold (3) are provided on both sides of the placement groove (21) and on the side near the core head (6). Clamping push rods (23) whose movable ends are connected to the clamping blocks (22) are fixedly connected to the sides of the positioning platform (2). The clamping mechanism (7) includes a clamping plate (71) that moves longitudinally above the cavity mold (3) and a clamping push rod (73) that is fixedly installed on the machine base (1) and whose movable end is connected to the top of the clamping plate (71). The clamping plate (71) has waist-shaped connecting holes (72) at the four corners. The top of the top mold (32) of the cavity mold (3) is welded with screws (321) for passing through the waist-shaped connecting holes (72). Each screw (321) is screwed with a washer nut (322) that contacts the top surface of the clamping plate (71) for locking the top mold (32) at the bottom of the clamping plate (71).

2. The quick-change mold bending cold pusher according to claim 1, characterized in that: The core head (6) is connected to the elbow push rod (4) via a four-jaw chuck (5), and the four-jaw chuck (5) is connected to the movable end of the elbow push rod (4) via a flange and bolts.

3. The elbow cold pusher with quick mold change according to claim 2, characterized in that: Both the clamping block (22) and the clamping push rod (23) on the same side are provided with at least two sets.

4. The quick-change mold bending cold pusher according to claim 3, characterized in that: The positioning platform (2) has auxiliary stabilizing rods (12) that are telescopically connected to the machine base (1) at all four corners of its bottom.

5. The quick-change mold bending cold pusher according to claim 4, characterized in that: The machine base (1) is fixedly connected to a canopy above the cavity mold (3) for supporting the pressing push rod (73).

6. The elbow cold pusher with quick mold change according to claim 5, characterized in that: The depth of the placement groove (21) does not exceed the bottom edge of the cavity of the cavity mold (3).

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