Shell vacuum brazing machine

Abstract

The utility model discloses a shell vacuum brazing machine which comprises a vacuum brazing box body, a clamping mechanism comprises fixing frames, two-way lead screws are rotationally connected to the bottoms of the two ends of the inner walls of the two fixing frames, matched moving blocks with sliding sleeves are arranged on the outer walls of the two ends of each two-way lead screw, and mounting plates are fixed to one sides of the two moving blocks with the sliding sleeves. Clamping plates are fixed to the side edges of the faces, close to each other, of the two mounting plates, limiting rods are fixed to the tops of the two ends of the fixing frame, holes allowing the limiting rods to penetrate through are formed in the tops of the two ends of the two moving blocks with the sliding sleeves, a rotary knob is fixed to one end of a bidirectional lead screw, and a workpiece pipe fitting can be fixedly clamped through the bidirectional lead screw. And unstable fixation is prevented. The workpiece fixing device achieves the effect of stably fixing a workpiece, is more stable compared with a spring, and improves the follow-up welding quality of the workpiece, so that the operation safety is improved, the integrity of the workpiece is protected, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of brazing machine technology, and in particular to a vacuum brazing machine for housing. Background Technology

[0002] A search revealed Chinese patent CN217859223U, which discloses a vacuum brazing machine for automotive EGR housings. This patent relates to the field of brazing equipment technology and includes a brazing box body. A caster wheel with brake pads is mounted on the lower surface of the brazing box body. An exhaust device is mounted on the upper surface of the brazing box body, and a support plate is fixedly installed inside the brazing box body. This automotive EGR housing vacuum brazing machine uses a vacuum suction base to adsorb and fix the joint, ensuring the consistency and stability of the fittings and avoiding localized welding temperature fluctuations due to positional deviations that could affect the welding effect. Compressed gas injected by a high-speed compressed air jet device enters through a hose and exits through a muffler, continuously generating a downward negative pressure within the cavity of the vacuum suction base. This draws the workpiece joint downwards, preventing deformation from compression. Simultaneously, it extracts hot air from the cavity, rapidly reducing the temperature within the vents for rapid cooling.

[0003] The aforementioned patent uses a positioning groove, a fixing plate, and a spring to clamp the workpiece for welding. However, when using the spring to clamp the workpiece, instability may occur, affecting the subsequent welding effect. Furthermore, the fixing plate is slidable via a slide bar; when aligning and welding two workpieces, the wobbling of the fixing plate may cause welding deviations between the workpieces, thus affecting the welding quality. Therefore, it is urgent to solve these problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a vacuum brazing machine for housings.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A vacuum brazing machine for housing includes a vacuum brazing box body. A slide rod is fixed to the top of the inner side of the vacuum brazing box body. A sliding ring is slidably provided on the outer wall of the slide rod. A limiting mechanism for limiting the sliding ring is provided on the top of the outer surface of the slide rod. A clamping mechanism for fixing and holding the workpiece is provided on one side of the sliding ring.

[0007] The clamping mechanism includes a fixed frame, with a bidirectional lead screw rotatably connected to the bottom of both ends of the inner wall of the two fixed frames. Each end of the bidirectional lead screw has a matching sliding block on its outer wall. A mounting plate is fixed to one side of each sliding block, and a clamping plate is fixed to the side of each mounting plate that is close to the other. Limiting rods are fixed to the top of both ends of the fixed frame, and holes for the limiting rods to pass through are opened at the top of both ends of the sliding blocks. A knob is fixed to one end of the bidirectional lead screw. The bidirectional lead screw can be used to clamp and fix the workpiece tube, preventing instability.

[0008] Preferably, the two clamping plates are provided with anti-slip pads on the sides that are close to each other.

[0009] Preferably, the end of the fixing frame away from the knob is connected to a pawl via a torsion spring, and the end of the bidirectional lead screw near the pawl is fixed with a ratchet, and the pawl and ratchet engage, so that the ratchet and pawl can limit the bidirectional lead screw.

[0010] Preferably, the limiting mechanism includes a limiting groove formed on the top of the outer surface of the slide rod, the inner wall of the limiting groove is provided with a plurality of threaded holes, and a matching limiting block is slidably provided on the inner wall of the limiting groove, and the limiting block is fixed to the inner wall of the sliding ring.

[0011] Preferably, the top of the outer surface of the sliding ring is provided with a through hole, and a threaded rod is slidably provided inside the through hole. The threaded rod is adapted to the thread of the threaded hole. The sliding ring can be limited by the cooperation between the threaded rod and the threaded hole.

[0012] Preferably, a high-frequency brazing machine is provided on the top of the interior of the vacuum brazing box body, a high-speed compressed air jet device is provided on one side of the bottom of the interior of the vacuum brazing box body, and a vacuum suction base is slidably provided on the other side of the bottom of the interior of the vacuum brazing box body. The air inlet of the vacuum suction base is connected to the air outlet of the high-speed compressed air jet device through a hose, and a positioning groove is provided on the top of the vacuum suction base.

[0013] Preferably, a cylinder is installed at one bottom end of the inner wall of the vacuum brazing box body, and the output shaft of the cylinder is fixedly connected to one end of the vacuum suction base.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. Due to the adoption of a clamping mechanism, by rotating the knob, two sliding blocks with sliding sleeves move closer together, which in turn moves two clamping plates closer together to clamp and fix the workpiece. Anti-slip pads cushion the workpiece to prevent deformation. Then, the ratchet and pawl limit the bidirectional lead screw, which in turn limits the clamping plates, thus achieving a stable fixation of the workpiece. Compared with springs, this is more stable, improves the subsequent welding quality of the workpiece, thereby improving operational safety, protecting the integrity of the workpiece, and increasing production efficiency.

[0016] 2. Due to the adoption of a limiting mechanism, when the threaded rod moves away from the threaded hole, the sliding ring can be moved freely on the outer wall of the sliding rod. Then, the sliding ring is limited by the matching of the threaded rod with the corresponding threaded hole, thereby improving the stability during welding, reducing the risk of accidents and damage during operation, and improving the ease of operation of the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the internal structure of the vacuum brazing box body of a shell vacuum brazing machine proposed in this utility model.

[0018] Figure 2 This is a partial structural diagram of the limiting mechanism and clamping mechanism of the vacuum brazing machine for housing proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of the second partial structure of the clamping mechanism of a vacuum brazing machine for housings proposed in this utility model;

[0020] Figure 4 This is a schematic diagram of one end of the fixing frame of a vacuum brazing machine for housings proposed in this utility model.

[0021] In the diagram: 1. Vacuum brazing box body; 104. High-frequency brazing machine; 105. High-speed compressed air injection device; 106. Vacuum suction base; 107. Positioning groove; 108. Cylinder; 2. Slide rod; 201. Limiting groove; 202. Threaded hole; 203. Sliding ring; 204. Threaded rod; 205. Limiting block; 206. Through hole; 3. Fixing frame; 301. Mounting plate; 302. Clamping plate; 303. Anti-slip pad; 304. Two-way lead screw; 305. Limiting rod; 306. Moving block with sliding sleeve; 307. Knob; 308. Ratchet; 309. Pawl. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figure 1-4 A vacuum brazing machine for housing includes a vacuum brazing box body 1. A slide rod 2 is fixed to the top inside the vacuum brazing box body 1. A sliding ring 203 is slidably provided on the outer wall of the slide rod 2. A limiting mechanism for limiting the sliding ring 203 is provided on the top of the outer surface of the slide rod 2. A clamping mechanism for fixing and clamping the workpiece is provided on one side of the sliding ring 203.

[0024] The clamping mechanism includes a fixed frame 3. Two fixed frames 3 are rotatably connected to the bottom of both ends of their inner walls. Both ends of the two fixed frames 304 are provided with matching sliding blocks 306 on their outer walls. One side of each sliding block 306 is fixed with a mounting plate 301. The sides of the two mounting plates 301 that are close to each other are fixed with clamping plates 302. The workpiece tube can be fixedly clamped by the two fixed frames 304 to prevent it from being unstable. Limiting rods 305 are fixed at the top of both ends of the fixed frames 3. Holes for the limiting rods 305 to pass through are opened at the top of both ends of the two sliding blocks 306. A knob 307 is fixed at one end of the two fixed frames 304.

[0025] In this utility model, anti-slip pads 303 are provided on the side of the two clamping plates 302 that are close to each other.

[0026] In this utility model, the end of the fixing bracket 3 away from the knob 307 is connected to a pawl 309 via a torsion spring, and the end of the bidirectional lead screw 304 near the pawl 309 is fixed with a ratchet 308, and the pawl 309 meshes with the ratchet 308. The ratchet 308 and the pawl 309 can limit the bidirectional lead screw 304.

[0027] In this utility model, the limiting mechanism includes a limiting groove 201 opened on the top of the outer surface of the slide rod 2. The inner wall of the limiting groove 201 is provided with a plurality of threaded holes 202. A matching limiting block 205 is slidably provided on the inner wall of the limiting groove 201, and the limiting block 205 is fixed to the inner wall of the sliding ring 203.

[0028] In this utility model, a through hole 206 is provided on the top of the outer surface of the sliding ring 203, and a threaded rod 204 is slidably provided inside the through hole 206. The threaded rod 204 is threaded and adapted to the threaded hole 202. The sliding ring 203 can be limited by the cooperation between the threaded rod 204 and the threaded hole 202.

[0029] In this utility model, a high-frequency brazing machine 104 is provided on the top of the interior of the vacuum brazing box body 1, a high-speed compressed air jet device 105 is provided on one side of the bottom of the interior of the vacuum brazing box body 1, and a vacuum suction base 106 is slidably provided on the other side of the bottom of the interior of the vacuum brazing box body 1. The air inlet of the vacuum suction base 106 is connected to the air outlet of the high-speed compressed air jet device 105 through a hose, and a positioning groove 107 is provided on the top of the vacuum suction base 106.

[0030] In this utility model, a cylinder 108 is installed at the bottom of one end of the inner wall of the vacuum brazing box body 1, and the output shaft of the cylinder 108 is fixedly connected to one end of the vacuum suction base 106.

[0031] Working principle: In use, first unscrew the threaded rod 204 away from the threaded hole 202. Then, the sliding ring 203 can be moved freely. The sliding ring 203 can drive the limiting block 205 to slide in the limiting groove 201. The limiting block 205 can limit the angle of the sliding ring 203 to prevent it from deflecting. Then, the sliding ring 203 will drive the fixed frame 3 to move. When the fixed frame 3 is moved to the appropriate position, the threaded rod 204 passes through the through hole 206. Then, the threaded rod 204 and the corresponding threaded rod are connected. After fitting the hole 202, the sliding ring 203 can be limited. The workpiece to be clamped is then placed between the two clamping plates 302. Rotating the knob 307 causes the bidirectional lead screw 304 to rotate. The rotation of the bidirectional lead screw 304 causes the two sliding blocks 306 with sliding sleeves to move closer together. At this time, the top of the sliding blocks 306 slides on the outer wall of the limiting rod 305, limiting its movement trajectory. The two sliding blocks 306 moving closer together... Two clamping plates 302 are moved closer together to clamp and fix the workpiece tube. The anti-slip pad 303 provides a buffer during clamping to prevent deformation. When the bidirectional lead screw 304 rotates, it drives the ratchet 308 to rotate. When the bidirectional lead screw 304 stops rotating, the pawl 309 engages with the ratchet 308 and limits the bidirectional lead screw 304 to prevent shaking during welding, which would result in poor welding effect. Then, another workpiece is placed in the positioning groove 107. The high-speed compressed air injection device 105 is then activated. The compressed air injected by the high-speed compressed air injection device 105 is introduced through the hose. At this time, a downward negative pressure is continuously generated in the cavity of the vacuum suction base 106, which can attract the workpiece. Then, the cylinder 108 is activated to adjust the vacuum suction base 106 so that the welding surfaces of the joint and the tube are aligned. Welding wire is pre-applied on the welding surface, and the high-frequency brazing machine 104 is turned on for welding.

[0032] It should be noted that the specific welding working principle is the same as that in patent number CN217859223U, and will not be elaborated further here.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A vacuum brazing machine for housings, comprising a vacuum brazing chamber body (1), characterized in that, The vacuum brazing box body (1) has a slide rod (2) fixed inside the top. The slide rod (2) has a sliding ring (203) slidably provided on the outer wall. The slide rod (2) has a limiting mechanism for limiting the sliding ring (203) on the top of its outer surface. The sliding ring (203) has a clamping mechanism for fixing and clamping the workpiece on one side. The clamping mechanism includes a fixed frame (3), and a bidirectional lead screw (304) is rotatably connected to the bottom of both ends of the inner wall of the two fixed frames (3). The outer walls of both ends of the bidirectional lead screw (304) are provided with a matching sliding block (306). A mounting plate (301) is fixed on one side of each of the two sliding blocks (306). A clamping plate (302) is fixed on the side of the two mounting plates (301) that are close to each other. A limit rod (305) is fixed at the top of both ends of the fixed frame (3), and a hole for the limit rod (305) to pass through is opened at the top of both ends of the two sliding blocks (306). A knob (307) is fixed at one end of the bidirectional lead screw (304).

2. The vacuum brazing machine for housings according to claim 1, characterized in that, The two clamping plates (302) are provided with anti-slip pads (303) on the side that is close to each other.

3. The vacuum brazing machine for housings according to claim 1, characterized in that, The end of the fixed bracket (3) away from the knob (307) is connected to a pawl (309) via a torsion spring. The end of the bidirectional screw (304) near the pawl (309) is fixed with a ratchet (308), and the pawl (309) meshes with the ratchet (308).

4. The vacuum brazing machine for housings according to claim 1, characterized in that, The limiting mechanism includes a limiting groove (201) opened on the top of the outer surface of the slide bar (2). The inner wall of the limiting groove (201) is provided with a plurality of threaded holes (202). The inner wall of the limiting groove (201) is slidably provided with a matching limiting block (205), and the limiting block (205) is fixed to the inner wall of the sliding ring (203).

5. The vacuum brazing machine for housings according to claim 4, characterized in that, The outer surface of the sliding ring (203) has a through hole (206) at the top, and a threaded rod (204) is slidably provided inside the through hole (206), and the threaded rod (204) is threaded to fit the thread of the threaded hole (202).

6. The vacuum brazing machine for housings according to claim 1, characterized in that, The vacuum brazing box body (1) is equipped with a high-frequency brazing machine (104) at the top inside. The vacuum brazing box body (1) is equipped with a high-speed compressed air jet device (105) on one side of the bottom inside. The vacuum brazing box body (1) is equipped with a vacuum suction base (106) on the other side of the bottom inside. The air inlet of the vacuum suction base (106) is connected to the air outlet of the high-speed compressed air jet device (105) through a hose. The top of the vacuum suction base (106) is equipped with a positioning groove (107).

7. The vacuum brazing machine for housings according to claim 1, characterized in that, A cylinder (108) is installed at the bottom of one end of the inner wall of the vacuum brazing box body (1), and the output shaft of the cylinder (108) is fixedly connected to one end of the vacuum suction base (106).

Images