WO2019242399A1

WO2019242399A1 - Fin arrangement method using radially expanding and contracting positioning pin rod

Info

Publication number: WO2019242399A1
Application number: PCT/CN2019/084119
Authority: WO
Inventors: 鲍剑斌; 孙国祥; 张财胜
Original assignee: 南京国佑智能化系统有限公司
Priority date: 2018-06-22
Filing date: 2019-04-24
Publication date: 2019-12-26
Also published as: CN108907028A; CN108907028B

Abstract

A fin arrangement method using a radially expanding and contracting positioning pin rod, comprising: adding a fin receiving plate on a stamping press receiving table, wherein the receiving plate and receiving pins constitute a basic structure for receiving fins; after the receiving is completed, returning the receiving plate, the receiving pins and a fin stack (102, 203) together to an arrangement position; disposing two rows of radially expanding and contracting positioning pin rods (103, 204) above or below the arrangement position, wherein the positioning pin rods are capable of passing through the receiving plate and fin holes of the fin stack; passing the positioning pin rods through the fin stack and the receiving plate, wherein ends of the positioning pin rods are each inserted into and connected to an end support member such that the positioning pin rods are vertically positioned; causing the positioning pin rods to radially expand and contract once, so as to concentrically align the fin holes in each layer of fins; and removing the positioning pin rods from the fin stack, thereby achieving arrangement of the entire fin stack and preparing the same for automatic pipe insertion. The fin arrangement method can greatly simplify pipe-insertion processes and devices in the field of air-conditioning heat exchangers and increase the level of automation.

Description

Method for finning by using radial expansion and contraction positioning needle bar

Technical field

The invention relates to an air conditioner manufacturing technology, in particular to an automatic pipe-through technology of radiating fins, in particular to a fin finishing method developed for faster and efficient automatic pipe-through.

Background technique

The aluminum foil is punched to form fins. On the material receiving table of the punch press, the material is received by two rows of receiving pins and stacked into a fin stack. Due to the requirements of the punch press, the diameter of the receiving pin must be significantly smaller than the diameter of the fin hole, so as to ensure that the fin blanking is smooth, but the fin blanking is not uniform, which is manifested by the concentricity of the upper and lower fin holes, and even adjacent fins. The film produces wrong pieces and laminations, which cannot be directly penetrated in this state.

When pipe is manually inserted, two steel needles need to be inserted into each row of fins, and the fins are taken out one by one and placed on the platform for further finishing. After a part of the copper pipe has been worn, the steel needle is pulled out and then the pipe is repaired.

For automatic tube insertion (refer to Chinese patent 2013101831099), you also need to insert two positioning pins on each row of fins to organize the fin stacking. (The diameter of the positioning pins used at this time must be basically the same as the diameter of the copper tube. Thinning will make the tube difficult to pass, and thicker will make it difficult to pull out the positioning pin after passing the tube.) Then remove the fin stack from the receiving platform as a whole and transfer it to the tube passing station for automatic tube passing. Then it is transported to the next station, and then a series of processes such as needle removal and tube repair, and tooling return are performed.

Summary of the Invention

The purpose of the present invention is to address a series of processes such as fin stacking and conveying and tool return due to the limitation of the positioning needles in the existing automatic tube-penetrating equipment, which must be pulled out after the automatic tube-penetration to perform the tube replenishment operation. As a result, problems such as multiple procedures, complicated process equipment, and low level of automation have been invented. A radial positioning pin that can automatically expand and contract was invented to immediately exit the fin stack after finishing the fin stack. Neither the tray nor the positioning pin need to be transported, nor the receiving tray and the positioning pin need to be returned.

The technical solution of the present invention is:

A method for finning by using a radial expansion and contraction positioning needle bar, which is characterized in that it includes the following steps:

First, the fin receiving pan and two rows of receiving pins are set on the punch receiving table. The receiving pan and the receiving pin form the basic component of the fin receiving. After the receiving is completed, the receiving pan, the receiving pin and the fin The sheet stacks are turned back to the finishing station together;

Secondly, two rows of radial expansion and contraction positioning needle rods which can pass through the receiving tray and the fin stacking hole are arranged at the lower (or upper) position of the finishing station;

Third, the positioning needle rod passes through the receiving tray and the fin stack, and the end is inserted into the positioning hole of the support to form a connection with the support, so that the positioning needle rod is in a vertical state;

Fourthly, the positioning needle rod is expanded and contracted once in the radial direction to realize the arrangement of the fin stack;

Fifth, the positioning needle rod and the receiving needle are respectively retracted from the fin stack under the elastic contraction state, and the fin stack finishing is finished;

The radial expansion and contraction positioning needle rod is a mechanical radial expansion and contraction positioning needle rod, which is mainly composed of a material receiving tray, a positioning needle rod, a mandrel, an end support and a material receiving needle; the positioning needle rod is a flexible metal The tube is cut into several petals, and the two ends are still in the shape of a complete cylinder. A moving mandrel with a swelling head is installed in the rod. When the moving mandrel moves axially, the swelling head partially expands the positioning needle rod. When the swelling head is removed, the diameter of the rod is expanded. Automatic recovery; under the unexpanded state, the positioning pin rod passes through the fin stack from below (or above) the receiving tray, and is docked with the end support, so that each positioning pin is in a vertical state; the moving mandrel is lowered (or raised) , Make the positioning needle bar perform a local expansion from top to bottom (or from bottom to top), forcing the irregular fins to automatically adjust the position in the horizontal direction, so that the fin holes of each layer of fins are in a concentric state, and the fins are automatically realized Finishing; then, positioning the needle bar in the state of radial contraction with the receiving needle at the same time down from the fin stack.

The radial expansion and contraction positioning needle rod is a pneumatic radial expansion and contraction positioning needle rod, which is mainly composed of a receiving tray, a positioning needle rod, an air bag, an end support and a material receiving needle. The pneumatic radial expansion and contraction positioning needle rod is composed of The elastic metal tube is cut into several petals, and the two ends are still in the shape of a complete cylinder. The rod is equipped with an inflatable airbag; the two air-exhaust positioning needle rods and the airbag pass through the fins from below (or above) the receiving tray in the contracted state. Stacked and docked with the end support, so that each positioning pin is in a vertical state; the air inlet of the ventilation joint, the airbag expands to expand the positioning pin rod radially, forcing the irregular fins to automatically adjust the position in the horizontal direction, so that each layer of fins The fin holes are in a concentric state to realize automatic fin finishing; then the ventilation joint is deflated, and the positioning needle rod exits the fin stack at the same time as the receiving needle in the state of radial contraction.

The beneficial effects of the present invention:

Fin expansion using radial expansion and contraction pin:

1. The process is simple and easy to use.

2. It can save the production line's automatic pull-out, manual pipe replenishment process and tooling circulation system and other components, which makes it possible to greatly reduce the manufacturing cost of production line equipment.

3. Can effectively reduce the footprint and space of the production line.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of a mechanical radial expansion and contraction positioning needle bar of the present invention. Fig. 1a) is a schematic diagram of a contracted state, and Fig. 1b) is a schematic diagram of an expanded state.

FIG. 2 is a schematic structural diagram of a pneumatic radial expansion and contraction positioning needle bar according to the present invention. Fig. 2a) is a schematic diagram of a contracted state, and Fig. 2b) is a schematic diagram of an expanded state.

FIG. 3 is a structural outline view of the fins during stacking and finishing.

detailed description

The invention is further described below with reference to the drawings and embodiments.

Embodiment 1.

A method for finning by using a mechanical radial expansion and contraction positioning needle bar, which comprises the following steps:

Secondly, two rows of mechanical radial expansion and contraction positioning needle rods that can pass through the receiving tray and the fin stacking hole are arranged at the lower (or upper) position of the finishing station;

Third, the positioning needle rod passes through the fin stack and the receiving tray, and the end is inserted into the positioning hole of the support to form a connection with the support, so that the positioning needle rod is in a vertical state;

Fourth, the positioning needle rod is expanded and contracted once in the radial direction, so that the fin holes of each layer of fins are in a concentric state, and the fin stacking is realized;

Fifth, the positioning needle rod and the receiving needle are respectively retracted from the fin stack under the elastic contraction state, and the fin stack finishing is finished; as shown in FIG. 3.

Details are as follows:

As shown in Figure 1. The new process for stacking and finishing the mechanical radial expansion and contraction positioning needle bar and fins according to the present invention (see the working schematic diagram of the mechanical radial expansion and contraction positioning needle bar for details). The positioning tray 101 and the fin stack 102 , Diameter expandable and contractible positioning needle bar 103, moving mandrel 104, and end support 105. The diameter expandable and contractible positioning needle rod 103 is cut into several petals by an elastic metal tube, and the two ends are still completely connected. A moving mandrel 104 with an expanding head is installed in the rod. When the moving mandrel 104 moves axially, the expanding head makes The positioning needle rod is partially expanded, and the diameter of the rod is restored when the expansion head is removed. The above-mentioned positioning tray 101 and the receiving needle jointly receive material, so that the fins are stacked into a stack and rotated from the punch receiving station to the finishing station; at this time, the two rows of diameter expandable and contractible positioning needle rods 103 and the moving core In the unexpanded state, the shaft 104 passes through the fin stack from below the positioning tray, and is docked with the end support 105, so that each positioning needle rod 103 is in a vertical state; the moving core shaft 104 is lowered, and the positioning needle rod 103 is from above. Perform a local expansion to the next, forcing the uneven position of the fins in the horizontal direction to make the fin holes of each layer of fins in a concentric state to achieve fin finishing; then, the positioning pin 103 is connected to the fins in a radial contraction state. The feed pin exits the fin stack at the same time. The fin holes of the stacked fin stack are consistent with the positioning needle bar 103 during expansion. The diameter of the positioning needle bar 103 during expansion can be designed according to the needs of the pipe-penetrating process, or it can be slightly larger than the diameter of the copper pipe.

实施例二。 Second embodiment.

as shown in picture 2.

A method for finning by using a pneumatic radial expansion and contraction positioning needle bar, which comprises the following steps:

Secondly, two venting radial expansion and contraction positioning needle rods which can pass through the receiving tray and the fin stacking hole are arranged at the lower (or upper) position of the finishing station;

Third, the positioning needle rod passes through the fin stack and the receiving tray, and the end of the positioning needle rod is inserted into the positioning hole of the support to form a connection with the support, so that the positioning needle rod is in a vertical state;

Details are as follows:

As shown in FIG. 2, a new process for stacking and arranging positioning pins and fins of a gas rod according to the present invention (refer to FIG. 2 for a schematic illustration of the radial expansion and contraction positioning pins of a gas rod). The sheet stack 203, the expandable and contractable positioning needle bar 204, the airbag 205 and its ventilation joint 201, and the end support 206 are composed. The expandable and contractible positioning needle rod 204 is cut into several petals by an elastic metal tube, and the two ends are still completely connected. A ventilated airbag 205 is installed in the rod. When the air inlet 201 is inflated, the airbag 205 expands to expand the positioning needle rod. When the ventilation joint 201 is inflated, the diameter of the positioning needle bar 203 is restored. The above-mentioned positioning tray 202 and the receiving needle jointly receive the materials, so that the fins are stacked into a stack and rotated from the punch receiving station to the finishing station; at this time, the two exhaust gas expand and contract the positioning needle rod 204 and the airbag 205. In the non-inflated state, pass through the fin stack from below (or above) the positioning plate, and dock with the end support 206 respectively, so that each pneumatic expansion and contraction positioning needle rod 204 is in a vertical state; the ventilation joint 201 receives air, and the airbag 205 expands Expand the positioning needle bar 204 radially, forcing the uneven fins to adjust the horizontal position, so that the fin holes of each layer of fins are in a concentric state to achieve fin finishing; then, the ventilation joint 201 is deflated and the positioning needle bar 204 is deflated. In the state of radial contraction, it exits the fin stack at the same time as the receiving needle. The fin hole of the fin stack after finishing is the same as the positioning needle bar 204 during expansion (the diameter of the positioning needle bar 204 during expansion can be achieved by adjusting the inlet pressure according to the needs of the pipe-through process), or it can be slightly larger than copper Tube diameter.

The parts not involved in the present invention are the same as or can be implemented by the prior art.

Claims

A method for finning by using a radial expansion and contraction positioning needle bar, which is characterized in that it includes the following steps:

First, the fin receiving pan and two rows of receiving pins are set on the punch receiving table. The receiving pan and the receiving pin form the basic component of the fin receiving. After the receiving is completed, the receiving pan, the receiving pin and the fin The sheet stacks are turned back to the finishing station together;

Secondly, two rows of radial expansion and contraction positioning needle rods that can pass through the receiving tray and the fin stacking hole are arranged at the lower or upper part of the finishing station;

Third, the positioning pin passes through the fin stack and the receiving tray, and the end of the positioning pin is inserted into the positioning hole of the support to form a connection with the support, so that the positioning pin is in a vertical state;

Fourth, the positioning needle rod is expanded and contracted once in the radial direction, so that the fin holes of each layer of fins are in a concentric state, and the fin stacking is realized;

Fifth, the positioning needle bar and the receiving needle both exit the fin stack under the elastic contraction state, and the fin stack finishing is finished.
The method according to claim 1, characterized in that the radial expansion and contraction positioning needle is a mechanical radial expansion and contraction positioning needle, which is mainly composed of a receiving tray, a positioning needle, a mandrel, an end support and The receiving needle is composed of a positioning needle rod which is made by cutting an elastic metal tube into several petals, and the two ends are still in the shape of a complete cylinder. A moving mandrel with an expanding head is installed in the rod. When the moving mandrel moves axially, the expanding head makes the positioning needle The rod is partially expanded, and the diameter of the rod is automatically restored when the expansion head is removed; the positioning needle rod passes through the fin stack from below (or above) the receiving tray in the unexpanded state, and is docked with the end support, so that each positioning needle It is in a vertical state; move the mandrel to lower (or rise), and make the positioning needle rod expand from top to bottom (or from bottom to top) once, forcing the irregular fins to adjust the position automatically in the horizontal direction, so that each layer of fins The fin holes are in a concentric state, so that the fins can be automatically arranged; then, the positioning needle rod is pulled out of the fin stack at the same time as the receiving needle in the state of radial contraction.
The method according to claim 1, characterized in that the radial expansion and contraction positioning needle is an inflatable radial expansion and contraction positioning needle, which is mainly composed of a receiving tray, a positioning needle, an airbag, an end support and Consisting of needle; air-expanded radial expansion and contraction positioning needle bar is cut into several petals by elastic metal tube, and the two ends are still in the shape of a complete cylinder. The rod is equipped with an inflatable air bag; two air-expansion positioning needle bars and air bag In the contracted state, it passes through the fin stack from below (or above) the receiving tray, and docks with the end support, so that each positioning pin is in a vertical state; the air inlet of the ventilation joint, and the airbag expands to expand the positioning pin rod radially. Force the irregular fins to adjust the position automatically in the horizontal direction, so that the fin holes of each layer of fins are in a concentric state, and the fins are automatically arranged; then the vent joint is deflated, and the positioning needle rod and the receiving needle are in the state of radial contraction. At the same time exit the fin stack.