Closed working cavity for reflow soldering

Abstract

The utility model relates to a closed working chamber for reflow soldering, which comprises a chamber, a cover plate matched with the chamber and a transmission mechanism for driving the cover plate to open and close, and when the cover plate and the chamber are in an open state, the cover plate and the chamber are completely separated from each other; the transmission mechanism comprises sliding rails and a lifting cylinder, the sliding rails are installed on the two sides of the cavity and connected with an external rack, the lifting cylinder is connected to the sliding rails in a sliding mode, the cover plate is jacked and driven by the lifting cylinder, and the movement path of the cover plate is that the cover plate horizontally moves along the sliding rails and vertically ascends and descends right above the opening of the cavity. According to the full-open type cover plate provided by the utility model, aiming at the special working conditions of feeding and discharging, the cover plate can be completely separated from the cavity, and when the cover plate is separated from the cavity, even the cover plate is not connected with the edge of the cavity, so that a larger operation space can be provided.

Description

Technical Field

[0001] This utility model relates to the field of reflow oven technology, and in particular to a sealed working chamber for reflow soldering. Background Technology

[0002] A reflow oven is a device that achieves welding by providing a heating environment to melt solder paste or pre-formed solder pads. Most reflow ovens on the market currently have a hinged door mechanism, which is prone to problems when locking and sealing, affecting the welding quality of the product. The opening angle of the cavity cover cannot exceed 90 degrees, and interference will occur when the robot arm grabs the workpiece from the outside of the cavity. Utility Model Content

[0003] In response to the shortcomings of the existing production technology, the applicant provides a reflow soldering sealed working chamber with a reasonable structure. Each chamber can be opened and closed independently, and a sliding cover is used during the opening and closing process. Compared with conventional hinged covers, the cover has a better sealing effect and the cover itself is subjected to less rigid impact.

[0004] The technical solution adopted in this utility model is as follows:

[0005] A sealed working chamber for reflow soldering includes a chamber, a cover plate that mates with the chamber, and a transmission mechanism that drives the cover plate to open and close. When the cover plate and the chamber are in the open state, they are completely disengaged. The transmission mechanism includes:

[0006] The slide rails are installed on both sides of the chamber and connected to the external frame.

[0007] The lifting cylinder is slidably connected to the slide rail, and the cover plate is lifted and moved by the lifting cylinder.

[0008] The movement path of the cover plate is: horizontal movement along the slide rail, and vertical lifting and lowering movement directly above the opening of the chamber.

[0009] As a further improvement to the above technical solution:

[0010] The slide rail includes a first sliding section that fits against the side wall of the cavity and a second sliding section that extends beyond the side wall of the cavity. The length of the second sliding section is greater than or equal to the length of the cavity cover plate along the sliding direction.

[0011] Each slide rail is equipped with at least two lifting cylinders, which are symmetrically arranged at both ends of the cover plate or arranged in an array on the side of the cover plate.

[0012] The lifting stroke of the lifting cylinder is greater than the maximum lifting height of the cover plate.

[0013] When the chamber and cover are in the closed state, the lifting cylinder always applies a downward pulling force to the cover, which is pressed against the opening of the chamber.

[0014] Each working chamber is equipped with an independent unit furnace frame, which includes a control housing and a bracket. The bracket is an open frame with a reserved operating space at the top to accommodate an external robotic arm.

[0015] The middle section of the control housing is reserved for opening and closing operation space, and the second sliding section extends from the bracket into the opening and closing operation space.

[0016] When the cavity and cover are in the open state, the cover is completely hidden within the opening and closing operation space.

[0017] The power source for the lifting cylinder is a motor installed at the end of the slide rail, and a screw drive structure is set between the motor and the lifting cylinder.

[0018] The beneficial effects of this utility model are as follows:

[0019] This invention features a compact and reasonable structure, and is easy to operate. Unlike conventional reflow ovens, where the cover plate is hinged to the chamber opening and typically cannot be opened to a 180° angle with the chamber opening, and considering the cover plate's weight and ease of repositioning, the cover plate is usually set to form an obtuse angle with the chamber opening when opened to its limit. This structural design also does not affect loading and unloading, as in conventional structures, the parts to be welded are horizontally conveyed within adjacent chambers.

[0020] This invention is applicable in scenarios where the workpiece to be welded needs to be lifted and lowered from the opening of the chamber, making conventional flip-top structures unsuitable. The fully openable cover provided by this invention addresses this specific loading and unloading situation, allowing the cover to completely detach from the chamber. Furthermore, when the cover detaches from the chamber, it does not even contact the edge of the chamber, providing greater operating space.

[0021] When the cover is in the covered state, the surrounding lifting cylinders always apply a tensioning and limiting force to the cover. In addition to the weight of the cover itself, the limiting force also helps to achieve the sealing purpose, ensuring that the cover is horizontally pressurized at the opening of the chamber and ensuring the degree of sealing. Attached Figure Description

[0022] Figure 1 This invention relates to a unit furnace frame with a working chamber.

[0023] Figure 2 This is a schematic diagram of the working chamber and transmission mechanism of this utility model.

[0024] Figure 3 This is a schematic diagram of the single-sided transmission mechanism of this utility model. The top structure of the slide rail is hidden in the figure, and the internal lead screw is shown.

[0025] Figure 4 This is a schematic diagram of the cavity of this utility model viewed from below.

[0026] Figure 5 This is a schematic diagram of the chamber opening cover of this utility model.

[0027] The components include: 1. Chamber; 2. Cover plate; 3. Transmission mechanism; 4. Unit furnace frame;

[0028] 301. Lifting cylinder; 302. First sliding section; 303. Second sliding section; 304. Motor; 305. Lead screw;

[0029] 401. Control housing; 402. Bracket section; 403. Opening and closing operation space. Detailed Implementation

[0030] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0031] like Figure 1-Figure 5 As shown, the reflow soldering sealed working chamber of this embodiment includes a chamber 1, a cover plate 2 that cooperates with the chamber 1, and a transmission mechanism 3 that drives the cover plate 2 to open and close. When the cover plate 2 and the chamber 1 are in the open state, they are completely disengaged. The transmission mechanism 3 includes:

[0032] The slide rails are installed on both sides of chamber 1 and connected to the external frame.

[0033] The lifting cylinder 301 is slidably connected to the slide rail, and the cover plate 2 is lifted and moved by the lifting cylinder 301.

[0034] The movement path of cover plate 2 is: horizontal movement along the slide rail, and vertical lifting and lowering movement directly above the opening of chamber 1.

[0035] The slide rail includes a first sliding section 302 that fits against the side wall of the cavity and a second sliding section 303 that extends beyond the side wall of the cavity. The length of the second sliding section 303 is greater than or equal to the length of the cavity cover plate 2 along the sliding direction.

[0036] Each slide rail is equipped with at least two lifting cylinders 301, which are symmetrically arranged at both ends of the cover plate 2 or arranged in an array on the side of the cover plate 2.

[0037] The lifting stroke of the lifting cylinder 301 is greater than the maximum lifting height of the cover plate 2.

[0038] When chamber 1 and cover plate 2 are in the closed state, lifting cylinder 301 always applies a pulling force to cover plate 2, which is pulled against the opening of chamber 1.

[0039] Each working chamber is equipped with an independent unit furnace frame 4. The unit furnace frame 4 includes a control housing 401 and a bracket part 402. The bracket part 402 is an open frame with a reserved operating space at the top to accommodate an external robotic arm.

[0040] The control housing 401 has a reserved opening and closing operation space 403 in the middle section, and the second sliding section 303 extends from the bracket part 402 into the opening and closing operation space 403.

[0041] When the cavity and cover 2 are in the open state, cover 2 is completely hidden within the opening and closing operation space 403.

[0042] The power source for the lifting cylinder 301 is a motor 304 installed at the end of the slide rail, and a lead screw 305 transmission structure is provided between the motor 304 and the lifting cylinder 301.

[0043] The specific structure and working principle of this utility model are as follows:

[0044] like Figure 1 As shown, each chamber 1 is mounted on the unit furnace frame 4 in the figure. The top of the unit furnace frame 4 is L-shaped, including a protruding control housing 401 and a bracket portion 402 lower than the control housing 401. The control housing 401 is a cubic structure formed by plates, and the control system and other structures are located inside the control housing 401. Steel sections extend outward and downward from the bottom of the control housing 401, splicing together to form the bracket portion 402. The slide rail in the transmission mechanism 3 rests on the bracket portion 402.

[0045] Each slide rail is divided into two sections: a second sliding section 303 extending into the control housing 401, and a first sliding section 302 resting on the bracket portion 402. The two slide rails are clamped on both sides of the chamber 1, which is located at the top of the bracket portion 402.

[0046] like Figure 2 and Figure 3 As shown, two lifting cylinders 301 are installed on each slide rail, corresponding to the two ends of the cover plate 2 respectively. Each slide rail has a built-in lead screw 305, which is driven to rotate by a motor 304 located at the end of the slide rail. The portion of each lifting cylinder 301 that falls inside the slide rail is penetrated by the lead screw 305 and is threadedly connected to the lead screw 305. When the lead screw 305 rotates, it pushes the lifting cylinder 301 to reciprocate back and forth. The two lifting cylinders 301 on one slide rail are linked together.

[0047] like Figure 4 and Figure 5As shown, the cover plate 2 is connected to the top of the piston rod of the lifting cylinder 301. When the lifting cylinder 301 pulls the cover plate 2 down, the four lifting cylinders 301 can apply force evenly to the cover plate 2, pulling the cover plate 2 tightly against the opening of the chamber 1, forming a completely sealed working environment. After the tooling fully loaded with workpiece completes one processing in the chamber 1, the lifting cylinder 301 pushes the cover plate 2 up again. Then the motor 304 drives the lead screw 305, and the lead screw 305 pulls the lifting cylinder 301, pulling the cover plate 2 back into the opening and closing operating space 403, completely separating it from the chamber 1, so that the robot arm can grasp the tooling.

[0048] The advantage of this application is that it has a large operating space during opening and closing; when closed, in addition to the pressure of the cover plate 2's own weight, the top of the cover plate 2 can be evenly stressed, which can make up for the external force required for sealing and pressurization, ensuring the internal environment is sealed and ensuring that the processing temperature is accurately controlled within the expected range.

[0049] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A sealed working chamber for reflow soldering, characterized in that: It includes a chamber (1), a cover plate (2) that cooperates with the chamber (1), and a transmission mechanism (3) that drives the cover plate (2) to open and close. When the cover plate (2) and the chamber (1) are in the open state, they are completely disengaged. The transmission mechanism (3) includes: The slide rails are installed on both sides of the chamber (1) and connected to the external frame. The lifting cylinder (301) is slidably connected to the slide rail. The cover plate (2) is lifted and driven by the lifting cylinder (301). The movement path of the cover plate (2) is: horizontal movement along the slide rail and vertical lifting movement directly above the opening of the chamber (1).

2. The sealed working chamber for reflow soldering as described in claim 1, characterized in that: The slide rail includes a first sliding section (302) that fits against the side wall of the cavity and a second sliding section (303) that extends beyond the side wall of the cavity. The length of the second sliding section (303) is greater than or equal to the length of the cavity cover plate (2) along the sliding direction.

3. The sealed working chamber for reflow soldering as described in claim 1, characterized in that: At least two lifting cylinders (301) are configured on each slide rail. The lifting cylinders (301) are symmetrically arranged at both ends of the cover plate (2) or arranged in an array on the side of the cover plate (2).

4. The sealed working chamber for reflow soldering as described in claim 2, characterized in that: The lifting stroke of the lifting cylinder (301) is greater than the maximum lifting height of the cover plate (2).

5. The sealed working chamber for reflow soldering as described in claim 4, characterized in that: When the chamber (1) and cover plate (2) are in the closed state, the lifting cylinder (301) always applies a pulling force to the cover plate (2) to pull it against the opening of the chamber (1).

6. The sealed working chamber for reflow soldering as described in claim 2, characterized in that: Each working chamber is equipped with an independent unit furnace frame (4). The unit furnace frame (4) includes a control housing (401) and a bracket part (402). The bracket part (402) is an open frame with a reserved operating space at the top to accommodate an external robotic arm.

7. The sealed working chamber for reflow soldering as described in claim 6, characterized in that: The control housing (401) has a reserved opening and closing operation space (403) in the middle section, and the second sliding section (303) extends from the bracket part (402) into the opening and closing operation space (403).

8. The sealed working chamber for reflow soldering as described in claim 7, characterized in that: When the cavity and cover plate (2) are in the open state, the cover plate (2) is completely hidden in the opening and closing operation space (403).

9. The sealed working chamber for reflow soldering as described in claim 1, characterized in that: The power source of the lifting cylinder (301) is a motor (304) installed at the end of the slide rail, and a lead screw (305) transmission structure is provided between the motor (304) and the lifting cylinder (301).

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