WO2020140878A1 - Heat recovery core edge strip automatic production equipment - Google Patents

Abstract

Heat recovery core edge strip automatic production equipment, comprising a steel strip decoiler (7), a hole punching and corner cutting machine (8), a roller press (9) and a folding and cut-off machine (10), arranged in sequence. The hole punching and corner cutting machine punches a round mounting hole (73) and a rectangular notch (72) into a steel strep, the round mounting hole acting as a mounting hole for an end part of a heat recovery core edge strip, and the rectangular notch acting as a folding space; the roller press using gradual rolling along a central axis line of the steel strip to cold bend the steel strip after hole punching and corner cutting into edge frame material, the edge frame material having two adjacent folded edges, an included angle of the adjacent folded edges being 60°-120°; the folding and cut-off machine cutting off edge frame material from adjacent edges of a rectangular notch, and simultaneously folding two sides of a cut opening into mounting end perpendicular to the L-shaped material. The present heat recovery core edge strip automatic production equipment directly uses cold bending and pressing of a steel strip into a heat recovery core edge strip; raw material utilization is very high, and it may be rolled into different angles, using the same set of equipment to produce heat recovery core edge strips in different shapes, complying with the idea of lean production and improving product competitiveness.

Description

Automatic production equipment for heat recovery core strip Technical field

The invention relates to a cold bending press type machine for automatically producing heat exchange equipment parts, in particular to an automatic production device for heat recovery core body side strips.

Background technique

The AC full heat exchange device, also known as the air duct type fresh air ventilator, has the advantages of compact structure and low power consumption. It is often used in ceiling type fresh air systems. Its internal plate heat recovery core is installed in the dirty air channel and fresh air channel. Heat energy exchange between the gases in the. As its core component, its heat recovery core has a cubic structure with equal cross-sections, and cross heat exchange channels are formed inside.

The working principle of the heat recovery core is shown in Figure 1. The core 1 is a moisture-permeable but heat-impermeable wet heat exchangeable paper material, such as fiber paper base material, etc., as the separator 2, and the separator 2 is provided with A plurality of wave-shaped plates 4 of the airflow inlet 3, and these wave-shaped plates 4 are staggered and cross-arranged on the indoor side I and the outdoor side II, thereby forming an unconnected indoor exhaust passage EE and outdoor intake passage in the core 1 FF, to ensure that the two streams will not mix together. The whole heat exchange process is that when the two airflows of the exhaust and the intake air are guided by the fan to perform indoor and outdoor air exchange through the heat recovery core 1, the two airflows transfer heat when they pass through due to the temperature difference, and at the same time Since the separator 2 is permeable to water vapor, it also achieves the effect of moisture mass transfer, so that the temperature and humidity are exchanged between the two air streams of the exhaust gas and the intake air, and the energy saving and sewage effects are achieved.

The applicant has filed a patent application for the diamond-shaped heat recovery core with the application number 201822264979X. The structure of the heat recovery core as shown in FIG. 2 is used to design a frame for the core. The frame is composed of the end cover 5 and the edge strip 6. Due to the increasing demand for thin heat exchangers in recent years, the manufacture of heat recovery cores also needs to increase efficiency and increase speed, and mass production should be automated. The inventor is actively engaged in research and innovation based on years of rich practical experience and professional knowledge in the design and manufacture of such products, and the application of academic principles. After continuous research and design, and after repeated trial-making of samples and improvements, the invention with practical value was finally created.

technical problem

In order to overcome the shortcomings in the prior art, the present invention provides an automatic mass production heat recovery core body edge manufacturing equipment and corresponding manufacturing method.

Technical solution

In order to solve the above technical problems, the heat recovery core body edge strip automatic production equipment provided by the present invention includes a strip uncoiler, a punching and cornering machine, a roller press and a corner cutting machine arranged in sequence;

The punching and corner cutting machine punches round holes and rectangular notches on the strip steel, the round holes are used as mounting holes at the ends of the edge strips of the heat recovery core, and the rectangular notches are used as bending spaces;

The roller press uses progressive rollers to cold bend the punched and angled strip into a frame profile along the center axis of the strip. The frame profile has two adjacent flanges, and the angle between adjacent flanges is 60° ~120°;

The angle-cutting machine cuts the frame profile from adjacent sides of the rectangular notch, and at the same time bends both sides of the incision to be perpendicular to the mounting end of the frame profile.

Specifically, the punching and corner cutting machine has a rectangular punch punching a rectangular notch, two circular punch punching a circular hole, the circular punch and the rectangular punch are linked, and a cylinder or a hydraulic cylinder is used In one reciprocating motion, two round holes are simultaneously cut on one side of the strip center line, and a rectangular notch is cut on the other side of the center line.

Specifically, the angle-cutting machine has a punching die that reciprocates, the punching die has a flat punch, and platens are arranged on both sides of the flat punch.

Specifically, a servo feeding mechanism is provided in front of the punching and corner cutting machine, and the servo feeding mechanism is connected to the control device of the angle cutting machine.

Specifically, several sets of rollers are arranged in sequence on the roller press, and the end angle of the rollers transitions from 180° to the target angle along the rolling direction. The rolling target angles are 105° and 75°. The first half of the roll will roll the strip to 105°, and the second half of the adjustable roll will roll the 105° frame to 75° in the pressed state. The adjustable rear half of the roller realizes the output of two different angle frames on the same roller press, and the two form the adjacent side strips of the diamond-shaped heat recovery core.

The present invention also provides a method for manufacturing a heat recovery core edge strip using the above-mentioned rolling production line, and a strip decoiler, a punching and cornering machine, a roll press, and a corner cutting machine arranged in sequence are used to manufacture the edge strip. After the width w, the strip steel with a width of 2w is used as the raw material, and the rectangular notch specification of the punching and corner cutting machine is set to w*(2w+d), and d is the cutting amount of the corner cutter.

Beneficial effect

The rolling of the present invention can not only produce the edge strips of the core body with a square cross section, but also suitable for the edge strips of the core body of various other shapes such as rhombus and hexagon. The direct use of strip steel is only cold bending, and the punching amount is very small The utilization rate of raw materials is extremely high. The structure is designed to meet the practical requirements of the air duct type fresh air ventilator, and the end cover provides a protective shell of the cage structure for the heat recovery core, which directly cooperates with the guide rail in the ventilator. The shell only needs the end cover and the side There are two types of materials, and the parts are highly interchangeable. It is suitable for rectangular heat recovery cores of different sizes and has a very high versatility. When it is necessary to manufacture heat recovery cores of different heights, there is no need to replace the mold, and only the stepping parameters of the corner cutter and angle cutter are adjusted on the CNC equipment, which is in line with the concept of lean production. The structure of the side strip is simple and convenient to manufacture and assemble, saving the raw materials, working hours and energy consumption required for manufacturing the core body, and improving the competitiveness of the product.

BRIEF DESCRIPTION

Figure 1 is a schematic diagram of heat transfer of an existing heat recovery core;

2 is a schematic structural view of a heat recovery core edge strip made by the present invention;

FIG. 3 is a schematic diagram of applying the edge strip of FIG. 2 to assemble a heat recovery core;

4 is a schematic structural diagram of an automatic production device for a heat recovery core body edge strip according to an embodiment of the present invention;

Figure 5 is a top view of Figure 4;

6 is a schematic structural view of the strip decoiler of FIG. 4;

7 is a schematic structural view of the punching and corner cutting machine in FIG. 4;

Figure 8 is a shape diagram of the strip steel processed by the punching and corner cutting machine;

9 is a schematic diagram of the structure of the roller press in FIG. 5;

10 is a schematic structural view of the angle-cutting machine in FIG. 5;

In the picture: core 1, partition 2, air inlet 3, wavy plate 4, end cover 5, edge strip 6, strip decoiler 7, punching and corner cutting machine 8, roller press 9, corner cutting machine 10 . Strip steel 71, rectangular notch 72, mounting hole 73, servo feed mechanism 81, reciprocating mechanism 82, mold 83.

Best Mode of the Invention

The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the drawings, in which the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions. Similar reference numerals and letters Similar items are shown in the following drawings. Therefore, once an item is defined in one drawing, there is no need to further define and explain it in subsequent drawings, in which all undefined components can be used. Have technology to achieve it.

As shown in FIGS. 4 and 5, the automatic heat recovery core body edge strip production equipment of this embodiment includes a strip uncoiler 7, a punching and cornering machine 8, a roll press 9 and a corner cutter 10 that are arranged in this order.

The present invention provides a brand-new structural form, ideas and methods for the manufacture of heat recovery core strips. There are many methods and ways to achieve this technical solution. The above are only exemplary preferred embodiments and cannot be understood as To limit the present invention, those of ordinary skill in the art can make changes, modifications, replacements, and variations to the above-described embodiments within the scope of the present invention without departing from the principle and purpose of the present invention.

Embodiments of the invention

As shown in Fig. 6, the strip uncoiler 7 is used to install a coiled steel strip and is driven by a servo motor to realize automatic feeding.

As shown in FIG. 7, a servo feed mechanism 81 is arranged at the front end of the punching and corner cutting machine 8, and a reciprocating mechanism 82 and a mold 83 are arranged at the rear section. For different lengths of the edge strip, it is linked with the punch servo to control the end of the edge strip at the belt Production location on steel. The punch for punching the round hole and the rectangular notch on the die 83 is connected together, and the reciprocating mechanism 82 uses an air cylinder or a hydraulic cylinder to simultaneously cut out two round holes with steel and a rectangular notch in one stroke.

As shown in FIG. 8, the circular mounting hole 73 and the rectangular notch 72 are punched out of the punching and cornering machine strip steel 71. The circular hole mounting hole 73 is used for riveting to the four corners of the heat recovery core body end cover, rectangular The gap serves as a margin for bending space and cutting.

As shown in Figure 9, the roller press 9 uses progressive rollers to cold bend the strip into a frame profile along the strip central axis; the end face of the roller on the roller press gradually transitions from 180° to the target angle, which can be 60° ~120°.

As shown in FIG. 10, the angle-cutting machine 10 also uses a reciprocating angle-cutting integrated die, which includes a plane punch in the middle and pressure plates on both sides, and cuts the frame profile from the middle on the adjacent side of the rectangular notch, while Bend the parts with round holes on both sides of the cut to form the ends perpendicular to the frame profile. The two mounting ends of the edge strip are cut out from the frame profile by twice punching to make a heat recovery core edge strip. Select the width w of the side strip, use strip steel with a width of 2w, and the specification of the rectangular notch of the punching and cornering machine is w*(2w+d), d is the cut amount of the cutting die. The length of the rectangular notch is the width of the two ends plus the cut-off amount at the time of cutting. The width is the width of one side of the profile, and the width of the two sides of the frame profile is equal, that is, 1/2 strip width.

The obtained side strip is shown in FIG. 2 and the application in the heat recovery core is shown in FIG. 3. The cage is composed of two upper and lower square end caps 5 and four side strips 6, and the square cross-section core 1 is embedded and installed in Inside the cage. The end cover 5 has bent edges formed around it. As shown in FIG. 4, the side bar 6 is formed by connecting two sides with an angle between the two sides, which is a long bar structure, and its end has a bending-shaped mounting part, which is connected to the end cover 5 The four corners are fixed with rivets. The installation method of the heat recovery core in the fresh air system can adopt the technical scheme as disclosed in CN 106322630 A, and use the edge strips of the heat exchange core to cooperate with the structural parts of the fresh air system.

Because the heat recovery core can achieve full heat recovery and has the characteristics of high recovery efficiency, it is currently widely used in the field of fresh air heat recovery in central air conditioning. This product is composed of air flow in the x-axis direction and another layer of air flow in the y-axis direction In the middle of the airflow flowing on both sides, there is a layer of heat and moisture transfer media that has been specially treated to isolate it, which can realize the transfer of temperature and humidity, and isolate the exchange of gas on both sides.

In the description of the present invention, it should be noted that the terms "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", " The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and The description is simplified, 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 construed as limiting the present invention. In addition, the terms "first" and "second" are used for description purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise specifically limited.

In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , Or integrally connected; either mechanically or electrically; directly connected, or indirectly connected through an intermediary, or internally connected between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

Industrial applicability

The invention directly uses the strip steel to cold-bend and press the heat recovery core body edge strips, the utilization rate of the raw materials is extremely high, and can roll different angles, and use the same set of equipment to produce different shape heat recovery core body edge strips, which is in line with lean production The concept of improving the competitiveness of products.

Claims (7)

1. An automatic production device for heat recovery core body edge strips, which is characterized by comprising a strip uncoiler, a punching and corner cutting machine, a roller pressing machine and a corner cutting machine arranged in sequence;

   The punching and corner cutting machine punches round holes and rectangular notches on the strip steel, the round holes are used as mounting holes at the ends of the edge strips of the heat recovery core, and the rectangular notches are used as bending spaces;

   The roller press uses progressive rollers to cold bend the punched and angled strip into a frame profile along the center axis of the strip. The frame profile has two adjacent flanges, and the angle between adjacent flanges is 60° ~120°;

   The angle-cutting machine cuts the frame profile from adjacent sides of the rectangular notch, and at the same time bends both sides of the incision to be perpendicular to the mounting end of the frame profile.
2. The automatic heat recovery core strip production equipment according to claim 1, characterized in that the punching and corner cutting machine has a rectangular punch punching a rectangular notch and two circular punch punching a round hole , The circular punch and the rectangular punch are linked to use a cylinder or hydraulic cylinder to simultaneously cut two round holes on one side of the strip centerline in one reciprocating motion, and a rectangular notch on the other side of the centerline.
3. The automatic heat recovery core strip production equipment according to claim 1, characterized in that: the corner cutter has a reciprocating punching die, the punching die has a flat punch, arranged on both sides of the flat punch Pressure plate.
4. The automatic heat recovery core body edge strip production equipment according to claim 1, wherein a servo feeding mechanism is provided in front of the punching and corner cutting machine, and the servo feeding mechanism is connected to the control device of the angle cutting machine.
5. The automatic heat recovery core strip production equipment according to claim 1, characterized in that several sets of rollers are arranged in sequence on the roller press, and the end face angle of the roller transitions from 180° to the target angle along the rolling direction .
6. The production method of the heat recovery core body edge strip automatic production equipment according to claim 1, characterized in that the edge strips are manufactured using a strip decoiler, a punching and cornering machine, a roller press, and a corner cutting machine arranged in sequence, After the width w of the side strip is selected, the strip steel with a width of 2w is used as the raw material. The rectangular notch of the punching and corner cutting machine is set to w*(2w+d), and d is the cutting amount of the corner cutter.
7. The production method of the heat recovery core strip automatic production equipment according to claim 1, characterized in that: the rolling target angles are 105° and 75°, the first half of the roll rolls the strip to 105°, the second half The adjustable roller rolls the 105° frame to 75° in the pressed state.

   A