CN113102548A

CN113102548A - Copper bar conveying method and conveying mechanism thereof

Info

Publication number: CN113102548A
Application number: CN202110289012.0A
Authority: CN
Inventors: 徐红波
Original assignee: Ningbo Gangbo Electronics Co ltd
Current assignee: Ningbo Gangbo Electronics Co ltd
Priority date: 2021-03-18
Filing date: 2021-03-18
Publication date: 2021-07-13

Abstract

The invention discloses a copper bar conveying method, which comprises the following steps: 1) when the copper coil is less than five circles, stopping the work of the punch, keeping the tension of the copper coil input into the punch by using a tension mechanism, and then drawing out the tail end of the copper coil; 2) welding the tail end of the extracted copper coil with the head end of a new copper coil; 3) and removing the old copper coil, and restarting the work of the punch until the copper bar between the tension mechanism and the new copper coil is tensioned, and loosening the tension mechanism.

Description

Copper bar conveying method and conveying mechanism thereof

Technical Field

The invention relates to a copper bar conveying method and a conveying mechanism thereof.

Background

The lead frame is formed by punching a copper bar through a punch. The copper bar input into the punch press needs to keep certain tension, and the tension can keep the copper bar surface smooth. This tension was originally provided by damping between the conveyor roller on which the copper bar was mounted and the bracket. But when the copper bar was only last several circles, the end of copper bar probably deviate from the conveying roller, and at this moment the copper bar just can not move along with the conveying roller together, has just also lost the tension that the damping provided naturally. It is easy to think of a solution in which several sets of tension rollers are added to the path of the copper bar to the punch press, but this solution is not suitable because the metal copper is soft and is easily subjected to plastic deformation. At present, in order to ensure the processing precision of the punch, the copper bar is directly cut off when the copper bar is only rolled for the last few times, and then a new copper bar is replaced, so that the material waste amount is very large, and therefore improvement is needed.

In addition, when one copper coil is used and replaced with the next copper coil, the copper coil needs to be tensioned and positioned again, which is very troublesome.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a copper bar conveying method, which greatly reduces the waste of materials and simultaneously reduces the preparation time for replacing the next copper coil.

Another object of the present invention is to provide a copper bar conveying structure, which can realize continuous conveying of copper bars, and greatly reduce material waste.

In order to solve the problems, the invention adopts the technical scheme that: a copper bar conveying method is characterized by comprising the following steps:

1) when the copper coil is less than five circles, stopping the work of the punch, keeping the tension of the copper coil input into the punch by using a tension mechanism, and then drawing out the tail end of the copper coil;

2) welding the tail end of the extracted copper coil with the head end of a new copper coil;

3) and removing the old copper coil, and restarting the work of the punch until the copper bar between the tension mechanism and the new copper coil is tensioned, and loosening the tension mechanism.

In the above technical solution, preferably, the welding method in step 2 is laser welding.

In the above technical solution, preferably, the operation of the punching machine is stopped when the copper coil has less than 3 remaining turns in step 1.

A copper bar conveying mechanism comprises a tension mechanism, a first support, a welding device and a second support, wherein a first copper coil is arranged on the first support, a second copper coil is arranged on the second support, a copper bar pulled out by the first copper coil enters a punch press through the tension mechanism, the welding device is arranged between the first support and the second support, the welding device comprises a body, a machine table is arranged on the body, a left pressing block, a right pressing block and a welding head are arranged above the machine table, the welding head is arranged between the left pressing block and the right pressing block, the head end of the second copper coil is pressed and fixed on the machine table through the right pressing block, when the first copper coil is only left for less than the last five circles of the punch press, the operation is stopped, then the tail end of the first copper coil is pulled out to be placed on the machine table, and the tail end of the first copper coil and the head end of the second copper coil are kept to be tightly attached to each other, and then starting the left pressing block, pressing and fixing the head end of the first copper coil on the machine table, and then starting the welding head to weld the head end of the first copper coil and the tail end of the second copper coil together.

In the above technical solution, preferably, the left pressing block and the right pressing block are provided with protruding points.

In the above technical scheme, preferably, the tension mechanism includes a frame, a bar-shaped hole is formed in the frame, an upper tension pulley is arranged in the bar-shaped hole, a lower tension pulley is arranged below the bar-shaped hole, and the upper tension pulley and the lower tension pulley clamp the copper bar.

In the above technical solution, preferably, the welding head is a laser welding head.

The invention has the following beneficial effects: under the condition that the last circles of the old copper coil are only left and constant tension cannot be kept, the new copper coil is welded with the new copper coil to maintain the tension when the copper bar is conveyed, the tail end of the old copper coil does not need to be cut off, and the new copper coil directly enters the punch press along with the old copper coil, so that the preparation work of repositioning and tensioning the new copper coil is omitted, the time is greatly saved, and the production efficiency is improved.

Drawings

Fig. 1 is a schematic view of the copper bar conveying mechanism in an initial state.

Fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.

Fig. 3 is a schematic view of copper bar welding.

Fig. 4 is a schematic view after the copper bar is welded.

Detailed Description

The invention is described in further detail below with reference to the following detailed description and accompanying drawings:

a copper bar conveying method is characterized by comprising the following steps:

1) when the copper coil is less than three circles, stopping the work of the punch, keeping the tension of the copper coil input into the punch by using a tension mechanism, and then drawing out the tail end of the copper coil;

2) carrying out laser welding on the tail end of the extracted copper coil and the head end of a new copper coil;

Referring to fig. 1 to 4, a copper bar conveying mechanism comprises a tension mechanism 1, a first support 2, a welding device 3 and a second support 4.

The tension mechanism 1 comprises a rack 11, a strip-shaped hole 12 is formed in the rack 11, an upper tension pulley 13 is arranged in the strip-shaped hole 12, a lower tension pulley 14 is arranged below the strip-shaped hole 12, and the upper tension pulley and the lower tension pulley clamp the copper bar.

The first support 2 is provided with a first copper roll 21, and a copper bar pulled out of the first copper roll 21 enters the punch press after passing through a tension mechanism.

A second copper coil 41 is arranged on the second bracket 4.

The welding device 3 is arranged between the first support 2 and the second support 4 and comprises a body 31, a machine table 32 is arranged on the body, a left pressing block 33, a right pressing block 34 and a welding head 35 are arranged above the machine table, and the welding head is a laser welding head. Salient points 3a are arranged on the left pressing block and the right pressing block. The welding head is arranged between the left pressing block and the right pressing block.

Referring to fig. 1, in an initial state, the right pressing block presses and fixes the head end of the second copper coil on the machine table for standby. And meanwhile, the upper tension wheel of the tension device is positioned at the top, so that the copper bar is not provided with redundant resistance when being conveyed, the energy consumption is reduced, and the requirement can be met due to the damping between the copper coil and the support.

Referring to fig. 2, when the first copper coil is only left for less than the last three turns, the punching machine stops working, the tail end of the first copper coil is pulled out and placed on the machine table to be tightly attached to the tail end of the first copper coil and the head end of the second copper coil, the left pressing block is started to press and fix the head end of the first copper coil on the machine table, and the welding head is started to weld the head end of the first copper coil and the tail end of the second copper coil together.

Referring to fig. 3, after welding, the welding mechanism and the first bracket are removed. Then the punch press is started, the punch press pulls the tail end of the first copper coil to continue to advance until the first copper coil is completely processed by the punch press, the second copper coil is gradually tensioned in the process, after the copper bar output by the second copper coil is tensioned, the second support is gradually leaned against the position of the previous first support, the second support replaces the first support, then the welding mechanism which is removed previously is placed at the initial position, and the first support is placed at the initial position of the second support. This is again the initial position of fig. 1 and the next cycle can be started.

Claims

1. A copper bar conveying method is characterized by comprising the following steps:

when the copper coil is less than five circles, stopping the work of the punch, keeping the tension of the copper coil input into the punch by using a tension mechanism, and then drawing out the tail end of the copper coil;

welding the tail end of the extracted copper coil with the head end of a new copper coil;

and removing the old copper coil, and restarting the work of the punch until the copper bar between the tension mechanism and the new copper coil is tensioned, and loosening the tension mechanism.

2. The copper bar conveying method according to claim 1, wherein: the welding method in the step 2 is laser welding.

3. The copper bar conveying method according to claim 1, wherein: and (3) stopping the work of the punch press when the copper coil is remained for less than 3 circles in the step 1.

4. The utility model provides a copper bar conveying mechanism which characterized in that: the welding device comprises a body, a machine table is arranged on the body, a left pressing block, a right pressing block and a welding head are arranged above the machine table, the welding head is arranged between the left pressing block and the right pressing block, the head end of the second copper coil is tightly pressed and fixed on the machine table by the right pressing block, when the first copper coil is only left for less than the last five circles, the punching machine stops working, then the tail end of the first copper coil is pulled out and placed on the machine table to be tightly attached to the head end of the second copper coil, and then starting the left pressing block, pressing and fixing the head end of the first copper coil on the machine table, and then starting the welding head to weld the head end of the first copper coil and the tail end of the second copper coil together.

5. The copper bar conveying mechanism according to claim 4, wherein: salient points are arranged on the left pressing block and the right pressing block.

6. The copper bar conveying mechanism according to claim 4, wherein: the tension mechanism comprises a rack, a strip-shaped hole is formed in the rack, an upper tension pulley is arranged in the strip-shaped hole, a lower tension pulley is arranged below the strip-shaped hole, and the upper tension pulley and the lower tension pulley clamp the copper bar.

7. The copper bar conveying mechanism according to claim 4, wherein: the welding head is a laser welding head.