Cold heading die for welding spot lining

Abstract

The utility model discloses a cold heading die for a welding spot bushing, which comprises a pressing rod (1) and a mounting frame (2) which are coaxially arranged and vertically distributed, the top of the mounting frame (2) is connected with a die core (3), the middle of the die core (3) is provided with a die cavity (4), and a plurality of raised lines (5) for extruding the side wall of a bushing blank are distributed on the periphery of the die cavity (4). A through die hole is formed in the die core (3) below the die cavity (4), an ejector rod (6) is connected into the die hole in a sliding mode, a step groove (7) used for being connected with a bushing blank in a buckling mode is formed in the upper end of the ejector rod (6), and the lower end of the ejector rod (6) is connected with the installation frame (2) through an elastic piece (8). The cold heading device can achieve cold heading machining of the welding spot lining.

Description

Technical Field

[0001] This utility model relates to a welding point bushing processing mold, and more particularly to a cold heading mold for welding point bushings. Background Technology

[0002] Solder joint bushings are a new type of metal fitting. They are elliptical rings with several metal weld joints distributed around their perimeter, allowing users to quickly weld and secure them during use. Traditional elliptical ring bushings are manufactured using cold heading dies, but these dies cannot machine the metal weld joints, increasing the manufacturing difficulty for solder joint bushing manufacturers.

[0003] Therefore, a cold heading die is needed to process the weld bushing. Utility Model Content

[0004] The purpose of this invention is to provide a cold heading die for solder joint bushings. It enables cold heading of solder joint bushings.

[0005] The technical solution of this utility model is as follows: A cold heading mold for welding bushings includes a pressure bar and a mounting frame arranged coaxially and distributed vertically. The top of the mounting frame is connected to a mold core, and the middle of the mold core is provided with a mold cavity. Several protrusions for pressing the sidewalls of the bushing blank are distributed around the mold cavity. A through mold hole is provided on the mold core below the mold cavity. An ejector rod is slidably connected in the mold hole. The upper end of the ejector rod forms a stepped groove for fastening and connecting the bushing blank. The lower end of the ejector rod is connected to the mounting frame via an elastic element.

[0006] In the aforementioned cold heading mold for welding point bushings, the mounting frame is detachably connected to a fixing block at the end away from the mold core. A placement groove is formed in the middle of the fixing block. One end of the elastic member is placed in the placement groove, and the other end of the elastic member extends to the outside of the placement groove and fits against the ejector rod.

[0007] In the aforementioned cold heading mold for welding point bushings, the middle part of the fixing block is provided with a through hole, and a drive rod for pushing the ejector rod outward is slidably connected in the through hole.

[0008] In the aforementioned cold heading mold for welding bushings, a limiting screw is threaded onto the fixing block outside the placement groove. One end of the limiting screw is located inside the mounting bracket and is used to limit the ejector rod, while the other end of the limiting screw extends to the outside of the mounting bracket.

[0009] In the aforementioned cold heading mold for welding bushings, a groove is formed between the fixing block and the mounting bracket. The ejector rod extends into the groove at the end away from the stepped groove and is provided with a pressure block. The outside of the pressure block forms a pressure surface for fitting the elastic element, the drive rod, and the limit screw.

[0010] In the aforementioned cold heading mold for welding point bushings, the inner end of the slide groove forms a limiting surface for limiting the ejection position of the pressure block.

[0011] In the aforementioned cold heading mold for weld point bushings, a glass sheet spring sleeved on the outside of the ejector rod is provided between the limiting surface and the pressure block. The lower end of the mounting bracket is bolted to a base, and a collection groove for collecting weld point bushings is formed around the base.

[0012] Compared with the prior art, this utility model has the following characteristics:

[0013] (1) This utility model uses the structure of pressure bar, mold core and ejector rod to make it able to snap and position the bushing blank to be processed by ejector rod; after the bushing blank is installed, the pressure bar applies downward extrusion force to it, so that the bushing blank is pressed into the mold cavity, and the outer wall of the bushing blank is deformed by the resistance of the convex strip during the falling process, that is, the corresponding welding point structure is formed, thereby realizing the cold heading of the welding point bushing; after the welding point bushing is cold heading, it can be ejected to the outside of the mold cavity by ejector rod, thus making it convenient for operators to install and replace the welding point bushing.

[0014] (2) Through the structural cooperation of the ejector rod, elastic element and limiting screw, the ejector rod can extend to the outside of the mold cavity to fasten the bushing blank in its natural state; when the pressure bar presses down on the bushing blank, the ejector rod can retract inward and reach the limit retraction position after contacting the limiting screw, so that the manufacturer can adjust the height position of the weld point on the weld point bushing with the limiting screw, thereby improving the processing effect of this utility model.

[0015] (3) Based on the above, by cooperating with the drive rod, it can also drive the ejector rod to actively push outward after the weld point bushing is formed, thereby effectively preventing the weld point bushing from getting stuck in the mold cavity after cold heading and failing to come out smoothly, thus improving the demolding stability of the weld point bushing; by cooperating with the glass sheet spring and the pressure block, it can also drive the ejector rod to spring back to its original position after the drive rod is disengaged from the ejector rod, thereby maintaining the reset effect of the ejector rod on the one hand, and on the other hand, it can use the retraction reset of the ejector rod to separate it from the weld point bushing, thereby causing the weld point bushing to fall into the external collection tank, further improving the processing efficiency of the operators;

[0016] Therefore, this utility model can realize the cold heading process of the welding point bushing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of Embodiment 1 in its initial state;

[0018] Figure 2 This is a top view of the mold core;

[0019] Figure 3 This is a schematic diagram of the structure of Example 1 during the cold heading process;

[0020] Figure 4 This is a schematic diagram of the structure of Embodiment 2 in its initial state;

[0021] Figure 5 This is a schematic diagram of the structure of Example 2 in the discharge state;

[0022] Figure 6 This is a drawing of the weld bushing after it has been machined and formed.

[0023] The markings in the attached diagram are as follows: 1-pressure bar, 2-mounting bracket, 3-mold core, 4-mold cavity, 5-protrusion, 6-ejector rod, 7-step groove, 8-elastic element, 9-fixing block, 10-placement groove, 11-drive rod, 12-limiting screw, 13-pressure block, 14-limiting surface, 15-glass sheet spring, 16-base, 100-opening, 200-welding point. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0025] Example 1. A cold heading die for a solder joint bushing, configured as follows: Figure 1-3 As shown, it includes a pressure bar 1 and a mounting frame 2 arranged coaxially and distributed vertically. The top of the mounting frame 2 is connected to a mold core 3. The mold core 3 has a mold cavity 4 in the middle. Several protrusions 5 for pressing the sidewalls of the bushing blank are distributed around the mold cavity 4. The mold core 3 below the mold cavity 4 has a through mold hole. An ejector rod 6 is slidably connected in the mold hole. The upper end of the ejector rod 6 forms a stepped groove 7 for fastening and connecting the bushing blank. The lower end of the ejector rod 6 is connected to the mounting frame 2 via an elastic element 8, which can be a compression spring.

[0026] The mounting bracket 2 has a fixing block 9 detachably connected to the end away from the mold core 3. The middle part of the fixing block 9 forms a placement groove 10. One end of the elastic member 8 is set in the placement groove 10, and the other end of the elastic member 8 extends to the outside of the placement groove 10 and fits against the ejector rod 6.

[0027] A limiting screw 12 is threaded onto the fixing block 9 outside the placement slot 10. One end of the limiting screw 12 is located inside the mounting bracket 2 and is used to limit the ejector rod 6. The other end of the limiting screw 12 extends to the outside of the mounting bracket 2.

[0028] A sliding groove is formed between the fixing block 9 and the mounting bracket 2. The ejector rod 6 extends into the sliding groove at the end away from the stepped groove 7 and is provided with a pressure block 13. The outside of the pressure block 13 forms a pressure surface for fitting the elastic member 8 and the limiting screw 12.

[0029] The inner end of the groove forms a limiting surface 14 for limiting the ejection position of the pressure block 13.

[0030] In this embodiment, the operator places the bushing blank to be processed onto the stepped groove 7, and then the pressure bar 1 applies downward pressure to the bushing blank, causing it to be pressed into the lower mold cavity 4. After the bushing blank enters the mold cavity 4, some areas around the bushing blank are obstructed by the protrusions 5 and cannot enter the mold cavity 4 together. This allows the protrusions 5 to cut the side walls of the bushing blank as it descends, so that the bushing blank can form a corresponding elongated opening 100 at the position of the protrusions 5 after entering the mold cavity 4. The cut material will accumulate at the upper end of the protrusions 5 and form a weld point 200, thereby achieving cold heading of the weld point 200. When the bushing blank is pressed down, the ejector rod 6 retracts together with the bushing blank. When the ejector rod 6 retracts to the point where the pressure block 13 contacts the limit screw 12, the weld point bushing reaches the low position and is cold-forged. Then the pressure bar 1 rises and resets, and the elastic element 8 ejects the weld point bushing back to the outside of the mold cavity 4 through the ejector rod 6, which is convenient for the operator to change parts.

[0031] Example 2. A cold heading die for a solder joint bushing, configured as follows: Figure 4-5 As shown, it includes a pressure bar 1 and a mounting frame 2 arranged coaxially and distributed vertically. The top of the mounting frame 2 is connected to a mold core 3. The mold core 3 has a mold cavity 4 in the middle. Several protrusions 5 for pressing the sidewalls of the bushing blank are distributed around the mold cavity 4. The mold core 3 below the mold cavity 4 has a through mold hole. An ejector rod 6 is slidably connected in the mold hole. The upper end of the ejector rod 6 forms a stepped groove 7 for fastening and connecting the bushing blank. The lower end of the ejector rod 6 is connected to the mounting frame 2 via an elastic element 8, which can be a compression spring.

[0032] The mounting bracket 2 has a fixing block 9 detachably connected to the end away from the mold core 3. The middle part of the fixing block 9 forms a placement groove 10. One end of the elastic member 8 is set in the placement groove 10, and the other end of the elastic member 8 extends to the outside of the placement groove 10 and fits against the ejector rod 6.

[0033] The fixing block 9 has a through hole in the middle, and a drive rod 11 for pushing the ejector rod 6 outward is slidably connected in the through hole. One end of the drive rod 11 extends to the outside of the mounting bracket 2 and is connected to the drive mechanism.

[0034] A limiting screw 12 is threaded onto the fixing block 9 outside the placement slot 10. One end of the limiting screw 12 is located inside the mounting bracket 2 and is used to limit the ejector rod 6. The other end of the limiting screw 12 extends to the outside of the mounting bracket 2.

[0035] A groove is formed between the fixing block 9 and the mounting bracket 2. The ejector rod 6 extends into the groove at the end away from the stepped groove 7 and is provided with a pressure block 13. The outside of the pressure block 13 forms a pressure surface for fitting the elastic member 8, the drive rod 11 and the limit screw 12.

[0036] The inner end of the groove forms a limiting surface 14 for limiting the ejection position of the pressure block 13.

[0037] A glass spring 15 is provided between the limiting surface 14 and the pressure block 13 and is sleeved on the outside of the ejector rod 6. The lower end of the mounting bracket 2 is bolted to a base 16, and a collection groove for collecting the welding point bushing is formed around the base 16.

[0038] This embodiment adds a drive rod 11 and a glass spring 15 to the existing embodiment 1. This allows the drive rod 11 to replace the elastic element 8 in forcefully ejecting the ejector rod 6 when the weld point bushing needs to be ejected after cold heading. This prevents the weld point bushing from getting stuck due to excessive tightness in the mold cavity 4, improving the ejection efficiency of the weld point bushing. During ejection, the ejector rod 6 causes the glass spring 15 to retract. After the drive rod 11 retracts, the spring 15 rebounds and moves the weld point bushing back to its initial position. This allows the weld point bushing, which is fastened to the top of the ejector rod 6, to rise to a high position with the ejector rod 6 during ejection, and then separate from the ejector rod 6 as it descends, thus achieving the removal of the weld point bushing. The operator can then sweep the weld point bushing into an external collection trough after removal, eliminating the need for separate removal and improving processing efficiency.

Claims

1. A cold heading die for solder joint bushings, characterized in that: It includes a pressure bar (1) and a mounting frame (2) arranged coaxially and distributed vertically. The top of the mounting frame (2) is connected to a mold core (3). The mold core (3) has a mold cavity (4) in the middle. The mold cavity (4) has several protrusions (5) distributed around it for pressing the sidewalls of the bushing blank. The mold core (3) below the mold cavity (4) has a through mold hole. An ejector rod (6) is slidably connected in the mold hole. The upper end of the ejector rod (6) forms a stepped groove (7) for fastening and connecting the bushing blank. The lower end of the ejector rod (6) is connected to the mounting frame (2) via an elastic element (8).

2. The cold heading die for a weld joint bushing according to claim 1, characterized in that: The mounting bracket (2) has a fixing block (9) detachably connected to the end away from the mold core (3). The middle part of the fixing block (9) forms a placement groove (10). One end of the elastic member (8) is placed in the placement groove (10), and the other end of the elastic member (8) extends to the outside of the placement groove (10) and fits against the ejector rod (6).

3. The cold heading die for a weld joint bushing according to claim 2, characterized in that: The fixed block (9) has a through hole in the middle, and a drive rod (11) for pushing the ejector rod (6) outward is slidably connected in the through hole.

4. A cold heading die for a weld joint bushing according to claim 2, characterized in that: A limiting screw (12) is threaded onto the fixing block (9) outside the placement slot (10). One end of the limiting screw (12) is located inside the mounting bracket (2) and is used to limit the ejector rod (6). The other end of the limiting screw (12) extends to the outside of the mounting bracket (2).

5. A cold heading die for a weld joint bushing according to claim 4, characterized in that: A groove is formed between the fixing block (9) and the mounting bracket (2). The ejector rod (6) extends into the groove at the end away from the stepped groove (7) and is provided with a pressure block (13). The outside of the pressure block (13) forms a pressure surface for fitting the elastic element (8) and the limiting screw (12).

6. A cold heading die for a weld joint bushing according to claim 5, characterized in that: The inner end of the groove forms a limiting surface (14) for limiting the ejection position of the pressure block (13).

7. A cold heading die for a weld joint bushing according to claim 6, characterized in that: A glass spring (15) is provided between the limiting surface (14) and the pressure block (13) and sleeved on the outside of the ejector rod (6). The lower end of the mounting bracket (2) is bolted to a base (16), and a collection groove for collecting the welding point bushing is formed around the base (16).

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