Vacuum reflow soldering furnace capable of automatically opening and closing door

Abstract

The utility model discloses an automatic door opening and closing vacuum reflow soldering furnace which comprises a furnace body, an opening is formed in one side of the furnace body, a door plate matched with the opening is arranged at the opening, and the automatic door opening and closing vacuum reflow soldering furnace further comprises a power device for the door plate to automatically get close to and get away from the opening. The power device comprises a driving assembly and a guiding assembly, the guiding assembly comprises two guiding shafts arranged on the two sides of the door plate correspondingly, and one end of each guiding shaft is connected to the outer wall of the furnace body and connected with the side, away from the furnace body, of the door plate through a first connecting block; the driving assembly drives the door plate to be close to or away from the furnace body opening along the guiding assembly, a rotary pressing air cylinder is further arranged outside the door plate and arranged on the lower portion of the furnace body, and when the door plate and the furnace body are combined and closed, the rotary pressing air cylinder extrudes the door plate to abut against the furnace body. The vacuum reflow soldering furnace capable of automatically opening and closing the door is high in automation degree, good in sealing stability of the furnace body and free of manual operation, safety and production efficiency are improved, and meanwhile welding accuracy is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to vacuum reflow soldering equipment technical field, specifically relates to a kind of automatic switch door vacuum reflow soldering furnace. BACKGROUND

[0002] Vacuum reflow soldering furnace is a kind of equipment for high-quality welding of semiconductor chips under vacuum environment, and is widely used in electronic, semiconductor and other fields. As a core component, the furnace body not only bears the container function of the welding process, but also provides the necessary heating environment to ensure high-quality welding of electronic components and circuit boards under vacuum conditions.

[0003] At present, the existing vacuum reflow soldering furnace body mainly adopts the way of lifting cover or horizontal push-pull for operation during loading and unloading. Most of these operation methods rely on manual cover opening, which has the following problems: low operation efficiency, long time-consuming for manual cover opening and loading and unloading, which cannot meet the demand of efficient production; limit the automation level of the equipment, and cannot adapt to the requirement of high automation degree of modern production line; manual operation is easy to cause inconsistency of loading and unloading position and force, which affects the welding quality; there are certain safety hazards in high temperature and vacuum environment, which increases the risk of operators. And there are two kinds of welding environments, positive pressure and negative pressure, which alternate during welding in vacuum reflow soldering furnace, and the sealing stability is required to be high. SUMMARY

[0004] The utility model aims at providing a kind of automatic switch door vacuum reflow soldering furnace, vacuum reflow soldering furnace is automatically opened and closed, and the sealing stability of furnace body is good, production efficiency is high, welding quality is good, and it is safe and reliable.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] An automatic switch door vacuum reflow soldering furnace includes a furnace body, an opening is provided on one side of the furnace body, and a door plate adapted to the opening is provided at the opening. The furnace body further includes a power device for automatically approaching and moving away from the opening. The power device includes a driving assembly and a guide assembly. The guide assembly includes two guide shafts arranged on both sides of the door plate. One end of the guide shaft is connected to the outer wall of the furnace body, and the other end is connected to the side of the door plate away from the furnace body through a first connecting block. The driving assembly drives the door plate to approach or move away from the opening of the furnace body along the guide assembly. A rotary compression cylinder is further provided outside the door plate. The rotary compression cylinder is arranged below the furnace body. When the door plate is combined with the furnace body to close, the locking tongue of the rotary compression cylinder contacts the side of the door plate away from the furnace body, and the door plate is pressed against the furnace body.

[0007] Further, the driving assembly is located at the bottom of the furnace body, comprising a motor, a screw rod and a screw rod support, the screw rod is arranged in parallel with the guide shaft, the screw rod is rotatably installed on the screw rod support, the motor is located at one end of the screw rod support and connected with one end of the screw rod, the screw rod is provided with a moving seat, and the moving seat is fixedly connected with the furnace body; the other end of the screw rod support is connected with the side, away from the furnace body, of the door plate through a second connecting block.

[0008] Further, the second connecting block is connected with the middle part of the door plate.

[0009] Further, two stroke sensors are further arranged on the screw rod, and the stroke sensors are respectively located at the limit positions of the two ends of the moving seat on the screw rod, and the two stroke sensors are signal connected with the motor controller and the controller of the rotary pressing cylinder.

[0010] Further, the guide shaft is connected with the furnace body through a linear bearing, the linear bearing is fixedly arranged on the furnace body, and the guide shaft passes through the linear bearing.

[0011] Further, the side, facing each other, of the two door plates is respectively provided with a hanging plate along the length direction of the side, and the two hanging plates are located on the same horizontal plane.

[0012] Further, the furnace body is further provided with a state sensor for detecting the opening and closing state of the door plate.

[0013] Further, the upper part of the furnace body is provided with an upper cover of a manual switch.

[0014] The utility model discloses a beneficial effect: adopt the automatic switch door plate of side edge opening setting, and set up the guide shaft that connects on the furnace body and the door plate on the both sides of the door plate, so that the door plate relative furnace body moves towards the same linear direction, so that the opening of the door plate and furnace body is always aligned, accurate positioning, and deviation will not be produced when loading, and the welding quality is influenced, the guide shaft is connected on the side, away from the furnace body, of the door plate through the first connecting block, so that the door plate will not interfere with the combination of the door plate and the furnace body in the switching process, the accurate combination of the door plate and the furnace body is realized through the joint action of the driving assembly and the guide assembly. The door plate is pressed by the rotary pressing cylinder after the door plate is closed, so that the connection of the door plate and the furnace body is more stable, can bear greater pressure, increases the sealing stability of the inside of the furnace body, and the welding quality is improved, the utility model discloses a vacuum reflow soldering furnace of automatic switch door, and the automation degree is high, and manual operation is not needed, and the safety and production efficiency are increased, and the welding accuracy is also greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the structure schematic diagram of the open state of the utility model;

[0016] Figure 2This is a schematic diagram of the structure of the present invention in its closed state;

[0017] Figure 3 This is a front view of the present invention.

[0018] Figure 4 This is a schematic diagram of a rotary pressure cylinder.

[0019] Component labels: Furnace body 1, Opening 11, Top cover 12, Door closing sensor 13, Door panel 2, Hanging plate 21, Guide shaft 3, Linear bearing 31, Limit block 32, First connecting block 33, Motor 4, Lead screw 41, Moving seat 42, Stroke sensor 43, Second connecting block 44, Rotary clamping cylinder 5, Locking tongue 51. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] like Figures 1-4 As shown, an automatic door-opening vacuum reflow oven includes a furnace body 1. An opening 11 is provided on one side of the furnace body 1, and a door panel 2 adapted to the opening 11 is provided thereon. This allows for a larger operating space for the door panel 2 during opening and closing, facilitates the conveying of welding materials, and makes horizontal conveying more stable. To improve the sealing at the junction of the door panel 2 and the furnace body 1, a sealing ring is also provided at the opening 11 of the door panel 2 or the furnace body 1 to ensure a vacuum negative pressure environment inside the furnace. The oven also includes a power device for automatically moving the door panel 2 closer to and further away from the opening 11. The power device includes a drive assembly and a guide assembly. The guide assembly includes two guide shafts 3 respectively disposed on both sides of the door panel 2. One end of each guide shaft 3 is connected to the outer wall of the furnace body 1, and the other end is connected to the side of the door panel 2 away from the furnace body 1 via a first connecting block 33. The first connecting block 33 is a two-section type. Figure 1The bending shape avoids the side of the door plate 2 from being in contact, under the action of the guide shaft 3, so that the door plate 2 moves relative to the furnace body 1 in the same straight line direction, so that the door plate 2 is always aligned with the opening 11 of the furnace body 1, and is accurately positioned; the guide shaft 3 is fixedly connected with one of the door plate 2 and the furnace body 1, and is movably connected with the other one, the guide shaft 3 moves with the fixedly connected end, and the movably connected end can only move in the length direction of the guide shaft 3, so that the door plate 2 and the furnace body 1 can be close to or away from each other; the driving assembly drives the door plate 2 to be close to or away from the opening 11 of the furnace body 1 along the guide assembly. The guide shaft 3 is connected to the side of the door plate 2 away from the furnace body 1 through the first connecting block 33, so that the door plate 2 does not interfere with the combination of the door plate 2 and the furnace body 1 during opening and closing; the door plate 2 realizes accurate combination with the furnace body 1 through the joint action of the driving assembly and the guide assembly. The driving assembly can be a gas rod, a hydraulic rod, an electric push rod and the like. The door plate 2 is further provided with a rotary pressing cylinder 5, a driving part of the rotary pressing cylinder 5 is installed on the lower part of the furnace body 1 through a support, and two are usually provided, so that the door plate 2 bears more pressure, the stress is more uniform, the door plate 2 is more closely attached to the furnace body 1, and the sealing performance is better; when the door plate 2 is combined with the furnace body 1 to be closed, the rotary pressing cylinder 5 is started, the locking tongue 51 is rotated to be in contact with the door plate 2, and the locking tongue 51 of the rotary pressing cylinder 5 is in contact with the side of the door plate 2 away from the furnace body 1, the locking tongue 51 extrudes the door plate 2 to make the door plate 2 abut against the furnace body 1; when the door plate 2 is needed to open the furnace body 1, the rotary pressing cylinder 5 is started first, the locking tongue 51 is rotated to a horizontal position, so that the door plate 2 can be smoothly opened and away from the furnace body 1; the rotary angle of the rotary pressing cylinder 5 is set to 90 degrees, the locking tongue 51 is rotated upward from the horizontal position to the set position after the downward clamping action is completed, so that the locking tongue 51 is pressed and clamped to the door plate 2, and the stress is larger and more stable. After the door plate 2 is closed, the rotary pressing cylinder 5 is used to press the door plate 2, so that the connection between the door plate 2 and the furnace body 1 is more stable, can bear larger pressure, increases the sealing stability of the inside of the furnace body 1, and improves the welding quality.

[0022] Further, the driving assembly is located at the bottom of the furnace body 1, so as to improve the space utilization. The driving assembly comprises a motor 4, a lead screw 41 and a lead screw support (not shown in the figure). The lead screw 41 is arranged in parallel with the guide shaft 3. The lead screw 41 is rotatably installed on the lead screw support. The motor 4 is located at one end of the lead screw support and is connected with one end of the lead screw 41. The motor 4 drives the lead screw 41 to rotate by output power. The lead screw 41 is provided with a moving seat 42. The moving seat 42 is fixedly connected with the furnace body 1. The lead screw 41 penetrates through the moving seat 42. The lead screw 41 is matched with the moving seat 42. The moving seat 42 moves along the length direction of the lead screw 41 under the action of the lead screw 41, so that the door plate 2 and the furnace body 1 are close to or away from each other. Since the furnace body 1 is generally fixed on the rack, the furnace body 1 cannot move. Therefore, the moving seat 42 is fixed when the lead screw moves. The motor 4 moves with the lead screw 41 to complete the close or away of the door plate 2. The purpose of the installation is to avoid that the end of the lead screw 41 protrudes too much from the door plate 22 and occupies too much space.

[0023] Further, the second connecting block 44 is connected with the middle part of the door plate 2. Since the driving assembly is located at the lower part of the furnace body 1 and the driving power required for driving the door plate 2 is small, generally only one driving assembly is installed. In order to facilitate the installation and operation of other matched devices, the driving assembly is generally installed at the edge of the bottom of the furnace body 1, that is, the lower part of one of the guide shafts 3. In order to save materials and installation space, a strip-shaped connecting block is generally used. In this way, the contact area between the door plate 2 and the second connecting block 44 can be more stable under the condition of smaller contact area, and the force is evenly distributed during movement. Under the long-time movement, the second connecting block 44 will not be deviated. The second connecting block 44 is generally a three-section type, so that the connection is stable, and materials and space are saved. Figure 1

[0024] ​Further, the lead screw 41 is further provided with two stroke sensors 43, and the stroke sensors 43 are respectively located at the limit positions of the moving seat 42 at the two ends of the lead screw 41, and the two stroke sensors 43 are signal connected with the controller of the motor 4 and the controller of the rotary pressing cylinder 5. When the stroke sensor 43 close to the door plate 2 side detects the moving seat 42, at this time the door plate 2 and the furnace body 1 are in the closed state, the current state is converted into an electrical signal and transmitted to the control system, when the motor 4 operates next time, it is to control the motor 4 to drive the door plate 2 to move away from the furnace body 1, when the welding work in the furnace body is completed and the furnace body needs to be opened, the rotary pressing cylinder 5 is started, so that the lock tongue 51 of the rotary pressing cylinder 5 releases the pressure and starts to reset, when the lock tongue 51 resets and rotates to the horizontal position, the motor 4 is started; when the stroke sensor 43 away from the door plate 2 side detects the moving seat 42, at this time the door plate 2 and the furnace body 1 are in the fully open state, the current state is converted into an electrical signal and transmitted to the control system, when the motor 4 operates next time, it is to control the motor 4 to drive the door plate 2 to move close to the furnace body 1, after the feeding is completed, the motor 4 is started, the door plate 2 starts to move close to the furnace body 1, until the stroke sensor 43 close to the door plate 2 side detects the moving seat, the rotary pressing cylinder 5 is started, the lock tongue 51 rotates and presses the door plate 2, so that the door plate 2 closely adheres to the furnace body 1; in this way, the automation degree of opening and closing the door is increased. The stroke sensor 43 can be an infrared sensor, a contact sensor and a photoelectric sensor, when the photoelectric sensor is used, a baffle can be arranged at the lower part of the moving seat 42, when the baffle blocks the stroke sensor 43, the position information can be converted into an electrical signal and transmitted to the control system; when the contact sensor is used, as long as the moving seat 42 and the contact sensor contact, the stroke sensor 43 can collect the position information of the moving seat 42, and the position information can be converted into an electrical signal and transmitted to the control system.

[0025] Further, the guide shaft 3 is connected to the furnace body 1 through a linear bearing 31, the linear bearing 31 is fixed on the furnace body 1, and the guide shaft 3 passes through the linear bearing 31. In this way, the guide shaft 3 can move back and forth in the length direction, generally, two linear bearings 31 are arranged on each side of the guide shaft 3 when arranged, so that the stability of the guide shaft 3 is stronger, the stress is uniform and the guide shaft 3 will not deviate; the end of the guide shaft 3 connected with the furnace body 1 is provided with a limiting block 32, so that the guide shaft 3 will not slide out of the linear bearing 31, and the limiting block 32 is provided with a buffer block made of rubber.

[0026] Further, the two door panels are provided with a hanging plate 21 on the side facing each other along the length direction, and the two hanging plates 21 are located on the same horizontal plane. The two hanging plates 21 are used for placing the chip fixture, the hanging plate 21 adopts a strip-shaped plate structure, and the opposite side of the two hanging plates 21 is provided with a clamping groove for bearing the chip fixture. In this way, the chip can be placed on the fixed position of the hanging plate 21, and then the door plate 2 is driven to automatically feed, without manual feeding, thereby improving the work efficiency and avoiding direct contact with the furnace body 1, and improving the safety performance.

[0027] Further, the furnace body 1 is further provided with a state sensor for detecting the opening and closing state of the door plate 2. The state of the door plate 2 can be further detected to increase the safety performance. The state sensor can be a photoelectric sensor or an infrared sensor, and can be arranged at the opening 11 of the furnace body 1. When the door plate 2 is closed, a signal can be detected and transmitted to the controller of the motor 4 and the controller of the rotary pressing cylinder 5.

[0028] Further, the furnace body 1 is further provided with a state sensor for detecting the opening and closing state of the door plate 2. The state of the door plate 2 can be further detected to increase the safety performance. The state sensor can be a photoelectric sensor or an infrared sensor, and can be arranged at the opening 11 of the furnace body 1. When the door plate 2 is closed, a signal can be detected and transmitted to the controller of the motor 4 and the controller of the rotary pressing cylinder 5.

[0029] Finally, it should be noted that in the description of the present application, it should be noted that the terms "vertical", "upper", "lower", "horizontal" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0030] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced equivalently. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An automatic door opening and closing vacuum reflow soldering furnace comprising a furnace body (1), an opening (11) is provided on the furnace body (1), a door plate (2) is provided at the opening (11) and is matched with the opening (11), characterized in that, It also includes power device for door plate (2) automatic approach and away from the opening (11); The power device includes a drive assembly and a guide assembly, the guide assembly includes two guide shafts (3) respectively arranged on both sides of the door plate (2), one end of the guide shaft (3) is connected to the outer wall of the furnace body (1), and the other end is connected to the side of the door plate (2) away from the furnace body (1) through a first connecting block (33); the drive assembly drives the door plate (2) to approach or away from the opening (11) of the furnace body (1) along the guide assembly; The door plate (2) is further provided with a rotary compression cylinder (5), the rotary compression cylinder (5) is arranged at the lower part of the furnace body (1), when the door plate (2) is combined with the furnace body (1) to close, the locking tongue (51) of the rotary compression cylinder (5) contacts the side of the door plate (2) away from the furnace body (1), and the door plate (2) is pressed to close to the furnace body (1).

2. The automatic door opening vacuum reflow soldering furnace according to claim 1, characterized in that, The drive assembly is located at the bottom of the furnace body (1), including a motor (4), a lead screw (41) and a lead screw support, the lead screw (41) is arranged in parallel with the guide shaft (3), the lead screw (41) is rotatably installed on the lead screw support, the motor (4) is located at one end of the lead screw support and connected with one end of the lead screw (41), the lead screw (41) is provided with a moving seat (42), and the moving seat (42) is fixedly connected with the furnace body (1); the other end of the lead screw support is connected with the side of the door plate (2) away from the furnace body (1) through a second connecting block (44).

3. The automatic door opening vacuum reflow soldering furnace according to claim 2, characterized in that, The second connecting block (44) is connected with the middle part of the door plate (2).

4. The automatic door opening vacuum reflow soldering furnace according to claim 3, characterized in that, The lead screw (41) is further provided with two stroke sensors (43), and the stroke sensors (43) are respectively located at the limit positions of the two ends of the moving seat (42) on the lead screw (41), and the two stroke sensors (43) are signal connected with the controller of the motor (4) and the controller of the rotary compression cylinder (5).

5. The automatic door-opening vacuum reflow soldering furnace according to claim 1, 2, 3 or 4, characterized in that, The guide shaft (3) is connected to the furnace body (1) through a linear bearing (31), the linear bearing (31) is fixed on the furnace body (1), and the guide shaft (3) passes through the linear bearing (31).

6. The automatic door opening vacuum reflow soldering furnace according to claim 1, characterized in that, The opposite sides of the two door plates (2) are respectively provided with hanging plates (21) along the length direction, and the two hanging plates (21) are located on the same horizontal plane.

7. The automatic door opening vacuum reflow soldering furnace according to claim 5, characterized in that, The opposite sides of the two door plates (2) are respectively provided with hanging plates (21) along the length direction, and the two hanging plates (21) are located on the same horizontal plane.

8. The automatic door opening vacuum reflow soldering furnace according to claim 7, characterized in that, The furnace body (1) is further provided with a state sensor for detecting the opening and closing state of the door plate (2).

9. The automatic door opening vacuum reflow soldering furnace according to claim 8, characterized in that, An upper cover (12) of a manual switch is arranged on the upper part of the furnace body (1).

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