CN221909256U - Multi-radius automatic continuous bending forming equipment for wire tube condenser - Google Patents

Abstract

The utility model discloses a multi-radius automatic continuous bending and forming equipment for a wire tube condenser, comprising a plurality of bending and forming units, characterized in that a workpiece positioning and bearing platform and a driving device are provided in the bending and forming units, a plurality of bending and forming units are sequentially connected to form the original bending length space of the wire tube condenser workpiece, and each bending and forming unit is provided with a combination mold; the combination mold comprises a movable bending mold roller and a fixed bending rod located on the front and back sides of the workpiece during operation. The workpiece is accurately positioned, continuously formed, and the size of the same batch of products is uniform and high in precision. The whole process is simple and stable, reducing labor intensity, realizing continuous operation of the assembly line, improving production efficiency, being able to manufacture products of multiple specifications in a variable position, adapting to bending of a variety of different radiuses of the wire tube condenser, avoiding abnormal deformation of the product, and improving product quality.

Description

A multi-radius automatic continuous bending forming equipment for wire tube condenser

Technical Field

The utility model relates to a condenser manufacturing technology, in particular to a continuous bending and forming equipment for a wire tube condenser in which a coiled tube is bent into a specific shape after welding a steel wire.

Background Art

Traditionally, the production of wire tube condensers is done by coiling a U-shaped bend into a flat structure, welding steel wire according to a set area, and then bending it into a specific shape manually or by a mold. The applicant has developed a forming mold, namely, patent publication number CN112935129A, an automatic folding equipment for a wire tube condenser, including an operating platform, a drive device and a start switch, a slide rail is provided on the operating platform, and a plurality of mutually hinged folding molds are configured with the slide rail as a horizontal movable limiter; the folding mold includes a left clamping plate and a right clamping plate, and the left clamping plate and the right clamping plate are connected by a meshing tooth group, and a lifting device is provided at the meshing tooth group; the folding mold is also provided with a workpiece quick-loading mechanism. This forming mold can solve the entire automatic assembly line process of loading, molding and unloading in the direction parallel to the U-shaped bend tube coil.

However, the wire tube condenser products formed along the vertical direction of the U-shaped bend tube disk cannot be used. Since the refrigeration tubes used in the condenser are made of single-layer or double-layer rolled welded steel pipes with high yield strength, if they are formed manually, the work intensity is too high, fatigue is easy and the efficiency is low. In particular, a condenser that requires a variety of bending molds with different radii to form requires frequent switching of the bending molds. In addition, manual bending may not be done in place, resulting in uneven spacing between the evaporation tubes after forming. This phenomenon will cause the condenser to deform, making it difficult to assemble and causing the workpiece to be scrapped. Furthermore, after the deformed condenser is forcibly installed on the refrigerator, the refrigerator will shake violently during operation, causing other components to loosen. The public and existing technologies also do not provide a solution to the wire tube condenser product solution formed along the vertical direction of the U-shaped bend tube disk for reference.

Summary of the invention

The purpose of the utility model is to solve the above-mentioned problems and to provide a multi-radius automatic continuous bending and forming equipment for a wire tube condenser, which has the characteristics of accurate feeding positioning, continuous forming, uniform size and high precision of the same batch of products after forming, and can adapt to various specifications and various different radius forming through displacement and mold change.

The above-mentioned technical problems of the utility model are mainly solved by the following technical scheme: a multi-radius automatic continuous bending and forming equipment for a wire tube condenser, comprising a plurality of bending and forming units, characterized in that the bending and forming units are provided with a workpiece positioning and carrying platform and a driving device, and the plurality of bending and forming units are connected in sequence to form the original bending length space of the wire tube condenser workpiece, and each bending and forming unit is respectively provided with a combined mold; the combined mold comprises a movable bending mold roller and a fixed bending rod located on the front and back sides of the workpiece during operation.

In the aforementioned wire tube condenser multi-radius automatic continuous bending and forming equipment, preferably, the bending and forming unit also includes a mold frame, on which a first synchronous gear and a second synchronous gear are arranged on both sides of the width of the workpiece, and a movable bending die roller positioning hole seat is provided in the center of the first synchronous gear and the second synchronous gear, and a fixed bending rod is connected between the first synchronous gear and the second synchronous gear and is parallel to the movable bending die roller.

In the aforementioned multi-radius automatic continuous bending and forming equipment for the wire tube condenser, preferably, the movable bending die rollers in each bending and forming unit are driven by respective cylinders.

In the aforementioned multi-radius automatic continuous bending and forming equipment for the wire tube condenser, preferably, the center line of the cylinder is coaxially arranged with the center lines of the first synchronous gear and the second synchronous gear.

In the aforementioned wire tube condenser multi-radius automatic continuous bending and forming equipment, preferably, the workpiece positioning and supporting platform provided in the bending and forming unit includes a support plate, on which are provided limit blocks for restricting the width direction of the workpiece, and the distance between the limit blocks is adjustable.

In the aforementioned wire tube condenser multi-radius automatic continuous bending and forming equipment, preferably, the distance between the several bending and forming units is adjustable; one end of the movable bending die roller is positioned by a die mounting seat arranged at the center of the first synchronous gear, and the movable bending die roller and the die frame are detachably assembled.

In the aforementioned wire tube condenser multi-radius automatic continuous bending and forming equipment, preferably, the workpiece positioning bearing platform in the several bending and forming units and the corresponding platform that finally completes the workpiece bending action are provided with a positioning plate, and the positioning plate is provided with a positioning pin.

In the aforementioned wire tube condenser multi-radius automatic continuous bending and forming equipment, preferably, the driving device of the bending and forming unit includes a motor, the motor drives a driving gear, the driving gear engages with the first synchronous gear and the intermediate gear at the same time, the intermediate gear engages with the second synchronous gear, and the first synchronous gear and the second synchronous gear rotate synchronously.

This technical solution is mainly designed from the following aspects:

First of all, it is aimed at the characteristics of the wire tube condenser, that is, the continuous U-shaped tubes in the same plane are welded by grouping steel wires, and then bent into a parallel state according to the size requirements to form a condenser product. The requirements of wire tube condenser products of different lengths and numbers of layers are met through a combination of several bending and forming units; the requirements of wire tube condensers of different widths are met through the limit blocks of the workpiece positioning bearing platform. This solution uses a single bending and forming unit to independently control and complete the forming steps in sequence without interfering with each other, so that the bending size of each layer of U-shaped bend tube disc meets the design accuracy. The design of the multi-size and all-round rapid positioning mechanism of this device makes loading and insertion simple, fast and accurate.

Secondly, the mold body is formed by synchronous gears. During the bending process, a limited position dynamic mold avoidance method is used to ensure that the entire set of processes and molds of the laminated product do not interfere with each other. The movable bending mold roller is driven by a cylinder to orderly extend and retract to complete "positioning" and "disengagement" under the premise of meeting the bending corner size of the product; the fixed bending rod realizes "bending" and "resetting" under the rotation of the synchronous gear set.

How to ensure the synchronization between the movable bending die roller and the fixed bending rod? This device uses two synchronous gears, and the working hole seat of the movable bending die roller is designed with the center of the gear to set the inner side positioning die for bending. The fixed bending rod is arranged on the wheel width between the two synchronous gears, forming a center and a bending arm. The movable bending die roller rotates by itself, and the fixed bending rod revolves around the movable bending die roller. The two synchronous gears are integrated into a synchronous execution group, and the bending and resetting can be completed by setting the rotation angle. Not only can the complete transition arc of the product bending part be obtained to ensure product quality, but the structure is simple and can avoid workpiece clamping by itself.

Furthermore, the device is optimized from the perspective of component selection to further ensure bending accuracy. Since the movable bending die roller is a process of continuous extension and retraction and resetting, the setting of the floating joint avoids the problem of piston rod bending due to eccentricity, poor balance accuracy, etc. The product positioning mechanism is set on the corresponding platform that finally completes the workpiece bending action, so that each bend of the product in the previous sequence can still be positioned at the same point along the length direction, thereby stabilizing the molding quality. The transmission route of the synchronous gear is optimized, and the limited space is used to set the bearing seat at the transmission shaft that spans the distance between the two synchronous gears to stabilize the gear transmission process and ensure synchronization stability.

Furthermore, the mold mounting seat is used to position the movable bending die roller in the first synchronous gear. Therefore, the gears used in bending and forming units of different radii are the same. Bending die rollers of different radii can be installed by using different mold mounting blocks, which reduces the gear loading and unloading or replacement of complete sets of units, reduces equipment investment, and improves equipment utilization.

During the entire forming process, this equipment defines the bending sequence of the workpiece through a time difference. Therefore, when all cylinders drive the movable bending die rollers to extend into place, several bending forming units work in sequence. Each time the bending operation is completed, the completed unit combination die returns to its original position, releasing the freedom of the folding direction of the bent part of the workpiece. The subsequent bending forming units repeat the bending action in sequence to complete the bending of the entire workpiece, thus avoiding product deformation caused by other factors such as the instability of the flat tube itself and misoperation during the forming process.

Compared with the prior art, the beneficial effects of the utility model are: accurate positioning of the workpiece, continuous molding, uniform size and high precision of products in the same batch, the whole process is simple and smooth, labor intensity is reduced, continuous operation of the assembly line is realized, production efficiency is improved, and multiple specifications of products can be manufactured in a variable position. It can adapt to various different radius bending of wire tube condensers, avoid abnormal deformation of products, and improve product quality.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of the utility model in a non-operating state.

FIG. 2 is a schematic diagram of the structure of the utility model in a usage state.

FIG. 3 is a schematic diagram of the structure of a bending and forming unit of the present invention that finally completes the workpiece bending action.

FIG. 4 is a schematic diagram of a partially enlarged structure in FIG. 3 .

FIG. 5 is a schematic diagram of the structure of the workpiece positioning and bearing platform at the position where the workpiece bending action is finally completed in the present invention.

FIG. 6 is a schematic diagram of a planar structure of a workpiece in position according to the present invention.

FIG. 7 is a schematic diagram of a workpiece mold position relationship structure of the utility model.

FIG8 is a schematic diagram of the structure of the state in which the first step of the bending operation is completed.

FIG. 9 is a schematic diagram of the structure of the state in which the second step bending operation is completed.

FIG. 10 is a schematic diagram of a gear transmission of the present utility model.

FIG. 11 is a working process and principle block diagram of the utility model.

12 and 13 are electrical control diagrams of the present utility model.

In the figure: 1-bending forming unit, 101-cylinder, 1101-positioning plate, 1102-positioning pin, 1103-pin mounting hole, 1104-support plate, 1105-limiting block, 102-floating joint, 103-rotating joint, 104-front template, 105-rear template, 106-movable bending die roller, 107-cylinder mounting seat, 108-motor, 109-bearing seat, 110-workpiece positioning bearing platform, 111-mold mounting seat, 112-fixed bending rod, 2-operating table, 3-workpiece.

Z1-first synchronous gear, Z2-driving gear, Z3~Z5-intermediate gears, Z6-second synchronous gear.

DETAILED DESCRIPTION

The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

This embodiment is a multi-radius automatic continuous bending and forming equipment for a wire tube condenser, as shown in Figures 1 and 2, with a rectangular operating table 2. Taking a three-pass bending condenser as an example, three bending and forming units 1 are arranged on the operating table 2, and the three bending and forming units 1 are connected in sequence to form the original bending length space of the wire tube condenser workpiece 3. In the bending and forming unit 1, a workpiece positioning and carrying platform 110 is configured, and the driving device includes a cylinder 101 and a reduction motor 108. The control system adopts a conventional PLC system, and cooperates with a proximity switch to achieve accurate control of the entire bending and forming equipment.

This embodiment is provided with a manual gear and an automatic gear. The manual gear is used when assembling and debugging a plurality of bending and forming units 1 and initial positioning and debugging of a workpiece 3, and the automatic gear is used during normal production.

Each bending and forming unit 1 is provided with a combined die, which includes a movable bending die roller 106 and a fixed bending rod 112 located on the front and back sides of the workpiece 15 during operation. The three bending and forming units 1 operate in sequence to complete the bending and forming of the workpiece 3.

Specifically, the structure of the bending and forming unit 1 is shown in Figures 3 and 4. The mold frame is provided, and the mold frame includes a front mold plate 104 and a rear mold plate 105. The front mold plate 104 and the rear mold plate 105 are parallel to each other and arranged vertically. The first synchronous gear Z1 and the second synchronous gear Z6 are provided on the opposite inner sides of the front mold plate 104 and the rear mold plate 105, that is, the first synchronous gear Z1 and the second synchronous gear Z6 are located on both sides of the width of the workpiece 3. As shown in Figure 6, the center of the first synchronous gear Z1 is provided with a mold mounting seat 111 for positioning the movable bending mold roller 106. The fixed bending rod 112 is connected between the first synchronous gear Z1 and the second synchronous gear Z6, and the end point is located on the gear spoke and is parallel to the movable bending mold roller 106. The center line of the movable bending mold roller 106 and the fixed bending rod 112 and the vertical center line of the movable bending mold roller 106 form an angle of 8 degrees. The length of the center line of the movable bending mold roller 106 and the fixed bending rod 112 is twice the bending radius.

The cross section of the movable bending die roller 106 includes at least one semicircular solid part, ie, a semi-cylinder. The fixed bending rod 112 is a round steel or round tube structure, and its diameter is larger than the center distance between two adjacent steel wires on the surface of the workpiece 3.

Furthermore, the movable bending die roller 106 and the fixed bending rod 112 are both made of hard nylon material or have a hard nylon coating on the surface to prevent damage to the workpiece.

The movable bending die roller 106 in each bending forming unit 1 is driven by a respective cylinder 101, and the cylinder 101 is fixed on a cylinder mounting seat 107. The center line of the cylinder 101 is coaxially arranged with the center lines of the first synchronous gear Z1 and the second synchronous gear Z6. The piston rod of the cylinder 101 is connected to the movable bending die roller 106 through a floating joint 102, a shaft head, and a rotary joint 103.

The workpiece positioning and carrying platform 110 provided in the bending and forming unit 1 includes a support plate 1104, on which a limit block 1105 is provided to restrict the width direction of the workpiece 3, and the distance between the limit blocks 1105 is adjustable to meet the positioning of workpieces 3 of different widths. In this embodiment, among the workpiece positioning and carrying platforms 110 in the three bending and forming units 1, the corresponding platform that finally completes the bending action of the workpiece 3 is provided with a positioning plate 1101, as shown in FIG5, and a pin mounting hole 1103 is provided on the positioning plate 1101, through which a positioning pin 1102 is installed. The pin mounting hole 1103 is a long waist hole or a cross long waist hole, so that the position of the positioning pin 1102 is optional.

The motor 108 in the driving device of the bending and forming unit 1 is partially driven, see Figure 7 and Figure 10:

The driving gear Z2 is driven by the motor 108, and the driving gear Z2 meshes with the first synchronous gear Z1 and the intermediate gear at the same time. The intermediate gear includes a coaxially arranged gear Z3 and a gear Z4, a bearing seat 109 is provided between Z3 and the gear Z4, the gear Z4 meshes with the gear Z5, and the gear Z5 meshes with the second synchronous gear Z6. In the gear transmission, the first synchronous gear Z1 and the second synchronous gear Z6 are exactly the same, the driving gear Z2 and the gear Z5 are exactly the same, and the gear Z3 and the gear Z4 are exactly the same. It is ensured that the first synchronous gear Z1 and the second synchronous gear Z6 rotate synchronously.

In the intermediate gear, a bearing seat 109 is provided at a transmission shaft portion spanning the interval between the first synchronous gear Z1 and the second synchronous gear Z6.

In this embodiment, the distance between the three bending and forming units 1 is adjustable. One end of the movable bending die roller 106 is positioned at the center of the first synchronous gear Z1 through the die mounting seat 111, and the other end, i.e., the center of the second synchronous gear Z6, is provided with a universal hole seat. The movable bending die roller 106 and the die frame are detachably assembled.

FIG. 12 and FIG. 13 are electrical control diagrams of this embodiment. Since they are conventional electrical control technologies, they will not be described in detail here.

Referring to Figures 8, 9 and 11, the operation and action flow is as follows:

The cylinders 101 of the three bending and forming units 1 are all retracted to their original state, the workpiece 3 is installed, the end of the wire tube condenser workpiece 3 is clamped into the positioning pin 1102, and the start switch is pressed, and the equipment automatically performs the following actions:

Action 1: The cylinders 101 of the three bending and forming units 1 extend simultaneously, and the movable bending die rollers 106 are sent to the top of the workpiece 3 . At this time, the fixed bending rods 112 are located below the workpiece 3 .

Action 2: The motor 108 of the first bending unit 1 drives its movable bending die roller 106 and fixed bending rod 112 to rotate 180 degrees. Usually, the rotation angle will be slightly higher than 2 to 5 degrees to cope with the rebound of workpieces 3 of different materials. The rotation angle can be set by PLC.

Action 3: The first group of bending and forming unit 1 cylinders 101 retract.

Action 4: The motor 108 of the first bending and forming unit 1 is reversed and reset.

Action 5: The motor 108 of the second bending and forming unit 1 drives its own movable bending die roller 106 and the fixed bending rod 112 to rotate 180 degrees.

Action 6: The second group of bending and forming unit 1 cylinders 101 retract.

Action 7: The motor 108 of the second bending and forming unit 1 is reversed and reset.

Action 8: The motor 108 of the third bending forming unit 1 drives the movable bending die roller 106 and the fixed bending rod 112 to rotate 180 degrees.

Action 9: The third group of bending and forming unit 1 cylinders 101 retract.

Action 10: The motor 108 of the third bending and forming unit 1 is reversed and reset.

Remove the workpiece and press the reset switch.

The bending operation of a workpiece 3 is completed.

The above embodiments are illustrations of the present invention, not limitations of the present invention. Without departing from the principles of the present technical solution, any equivalent changes or equivalent modifications made in accordance with the technical ideas proposed by the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims (6)

1. A multi-radius automatic continuous bending and forming equipment for a wire tube condenser, comprising a plurality of bending and forming units (1), characterized in that a workpiece positioning and carrying platform (110) and a driving device are provided in the bending and forming units, the plurality of bending and forming units are sequentially connected to form an original bending length space of a wire tube condenser workpiece (3), and each bending and forming unit is provided with a combined mold; the combined mold comprises a movable bending mold roller (106) and a fixed bending rod (112) located on the front and back sides of the workpiece during operation; The bending and forming unit (1) also includes a mold frame, on which a first synchronous gear (Z1) and a second synchronous gear (Z6) are arranged on both sides of the width of the workpiece (3), a movable bending die roller (106) positioning hole seat is provided at the center of the first synchronous gear and the second synchronous gear, and a fixed bending rod (112) is connected between the first synchronous gear and the second synchronous gear and is parallel to the movable bending die roller; The distance between the plurality of bending and forming units (1) is adjustable; one end of the movable bending die roller (106) is positioned by a die mounting seat (111) arranged at the center of the first synchronous gear (Z1); the movable bending die roller and the die frame are detachably assembled. 2. A multi-radius automatic continuous bending and forming equipment for a wire tube condenser according to claim 1, characterized in that the movable bending die roller (106) in each bending and forming unit (1) is driven by a respective cylinder (101). 3. The multi-radius automatic continuous bending and forming equipment for a wire tube condenser according to claim 2 is characterized in that the center line of the cylinder (101) is coaxially arranged with the center lines of the first synchronous gear (Z1) and the second synchronous gear (Z6). 4. According to claim 1, a multi-radius automatic continuous bending and forming equipment for a wire tube condenser is characterized in that the workpiece positioning support platform (110) provided in the bending and forming unit (1) includes a support plate (1104), and the support plate is provided with a limit block (1105) for restricting the width direction of the workpiece (3), and the distance between the limit blocks is adjustable. 5. According to claim 1, a multi-radius automatic continuous bending and forming equipment for a wire tube condenser is characterized in that the workpiece positioning support platform (110) in the plurality of bending and forming units (1), and the corresponding platform that finally completes the bending action of the workpiece (3) are provided with a positioning plate (1101), and the positioning plate is provided with a positioning pin (1102). 6. According to claim 1, a multi-radius automatic continuous bending and forming equipment for a wire tube condenser is characterized in that the driving device of the bending and forming unit (1) includes a motor (108), the motor drives a driving gear (Z2), the driving gear engages with the first synchronous gear (Z1) and the intermediate gear at the same time, the intermediate gear engages with the second synchronous gear (Z6), and the first synchronous gear and the second synchronous gear rotate synchronously.