Movable negative-pressure automatic docking device for lost foam casting

Abstract

The utility model relates to a mobile negative pressure automatic butt joint device for lost foam casting, which comprises butt joint devices, two sets of workbenches, an adjusting seat, a support frame, a transmission system and a negative pressure vacuum pipeline, the two sets of butt joint devices are arranged on the workbenches, one set of workbench is arranged on the adjusting seat, the other set of workbench is arranged below the support frame, and the transmission system is arranged on the support frame. The workbenches move through the transmission systems, the two transmission systems are fixed to the adjusting base and the supporting frame correspondingly, the transmission systems are started at the same time, the workbenches move forwards synchronously along with the sand box, the negative pressure maintaining time after pouring is prolonged, the two workbenches are used alternately, the working efficiency is higher, the traditional negative pressure pumping mode is changed through the negative pressure automatic butt joint device, and the labor intensity of workers is lowered. The pressure maintaining time of the sand box after pouring is prolonged, the stability of negative pressure in the sand box is kept, the phenomena of sand washing, box stepping and mold wall moving are prevented, the discharging speed of model gasification products is increased, and the defects of sand burning, air holes, carbon black and the like of castings are avoided.

Description

Technical Field

[0001] The utility model relates to the field of vacuum pouring processing in lost foam casting production, and is a mobile negative pressure automatic docking device for vacuum exhausting of a sand box in the lost foam pouring process. Background Art

[0002] Lost foam casting is a new casting method in which the foam model of the casting is coated with refractory paint and dried, then buried in precious sand for vibration molding, poured under negative pressure, vaporized the model, and liquid metal occupies the position of the model, which solidifies and cools to form a casting.

[0003] The so-called negative pressure pouring means that during the metal liquid pouring process, the molding sand around the model in the sand box needs to be kept in a compact and formed state and maintained for a certain duration. This goal can be achieved with the help of negative pressure vacuum, and the sand box has a controllable negative pressure vacuum, which can not only improve the strength of the casting, but also reduce the air pressure at the interface between the metal and the model, which is beneficial to reduce the carbon black defects on the surface of the casting and obtain a casting with a clear outline. Therefore, whether the negative pressure in the sand box can meet the production requirements directly determines the stability of the casting and the yield of the casting. Utility Model Content

[0004] The utility model aims to provide a negative pressure automatic docking device which can move together with a sand box, solve the deficiencies of the prior art, improve the control accuracy of sand box air extraction, and prolong the time of negative pressure extraction.

[0005] The utility model adopts the following technical solutions:

[0006] The mobile negative pressure automatic docking device includes a docking device, a workbench, an adjustment seat, a support frame, a transmission system, and a negative pressure vacuum pipeline. Two sets of docking devices are installed on the workbench. There are two sets of workbenches, one set of workbenches is placed on the adjustment seat, and the other set of workbenches is placed under the support frame. The workbench is moved by the transmission system. The two sets of transmission systems are respectively fixed to the adjustment seat and the support frame. The workbench and the support frame are provided with negative pressure vacuum pipelines connecting the docking device and the vacuum main pipeline.

[0007] Preferably, the docking device includes a docking block, a docking main warehouse, a first vacuum pipeline, a docking seat, a cylinder, and a cylinder support. The docking block is installed on the docking main warehouse, the docking main warehouse is placed on the docking seat, supported and guided by the axle, the docking seat is connected and fixed to the workbench, the cylinder support is fixed to the workbench by bolts, the cylinder is installed on the cylinder support, and connected to the docking main warehouse; the docking main warehouse is provided with an air extraction port, which is connected to the vacuum pipeline of the workbench.

[0008] Preferably, the workbench includes a workbench body, guide wheels, a movable connecting plate, a connecting shaft, a second vacuum pipeline, and a pneumatic butterfly valve. The connecting shaft is fixed on the workbench body, the movable connecting plate is installed on the connecting shaft, the guide wheels are installed on both sides of the workbench body, the second vacuum pipeline is on one side of the workbench body, and the pneumatic butterfly valve is installed on the second vacuum pipeline.

[0009] Preferably, the adjustment seat includes a first frame, a first anti-collision block, a first transmission system mounting seat, and a first chain roller. There is a first anti-collision block at each of the front and rear ends of the first frame, and the first transmission system mounting seat is welded and fixed on the left and right sides respectively, and the first chain roller is welded and fixed in the middle of the first frame.

[0010] Preferably, the support frame includes a second frame body, a second anti-collision block, a second transmission system mounting seat, a second chain roller, and a third vacuum pipeline. There is a second anti-collision block at each of the front and rear ends of the second frame body, and the second transmission system mounting seat is welded and fixed on the left and right sides respectively. The second chain roller is welded and fixed in the middle of the second frame body, and the third vacuum pipeline is fixed on one side of the support frame and connected to the main pipeline.

[0011] Preferably, the transmission system includes a reducer, a transmission shaft, a driven shaft, a bearing seat, a sprocket, and a chain. The reducer is connected to the transmission shaft, the transmission shaft is installed on the first transmission system mounting seat and the second transmission system mounting seat through the bearing seat, the sprocket is installed on the transmission shaft, and the chain reciprocates between the transmission shaft and the driven shaft through the sprocket.

[0012] Preferably, the negative pressure vacuum pipeline is a vacuum pipeline that uses a rubber black hose to connect the docking device, the workbench and the support frame.

[0013] The utility model has the following beneficial effects: the negative pressure automatic docking device changes the traditional negative pressure extraction method, prolongs the sand box pressure holding time after pouring, maintains the stability of the negative pressure in the sand box, prevents the occurrence of sand flushing, stepping box and mold wall movement, increases the discharge speed of model gasification products, and avoids defects such as sand sticking, air holes, and carbon black in castings.

[0014] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a structural schematic diagram of a mobile negative pressure automatic docking device;

[0017] Figure 2 It is a schematic diagram of the docking device structure of a mobile negative pressure automatic docking device;

[0018] Figure 3 It is a schematic diagram of the working table structure of the mobile negative pressure automatic docking device;

[0019] Figure 4 It is a schematic diagram of the transmission system structure of a mobile negative pressure automatic docking device.

[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0021] 1. Docking device; 1a. Docking block; 1b. Docking main compartment; 1c. First vacuum pipeline; 1d. Docking seat; 1e. Cylinder; 1f. Cylinder support; 2. Workbench; 2a. Workbench body; 2b. Guide wheel; 2c. Mobile connecting plate; 2d. Connecting shaft; 2e. Second vacuum pipeline; 2f. Pneumatic butterfly valve; 3. Adjusting seat; 3a. First frame; 3b. First anti-collision block; 3c. First transmission system mounting seat; 3d. First chain roller; 4. Support frame; 4a. Second frame; 4b. Second anti-collision block; 4c. Second transmission system mounting seat; 4d. Second chain roller; 4e. Third vacuum pipeline; 5. Transmission system; 5a. Reducer; 5b. Transmission shaft; 5c. Driven shaft; 5d. Bearing seat; 5e. Sprocket; 5f. Chain; 6. Negative pressure vacuum pipeline. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The accompanying drawings of the specification are structural schemes of the utility model, which will be further described below in conjunction with the accompanying drawings.

[0024] like Figure 1-Figure 4 As shown: the mobile negative pressure automatic docking device includes a docking device 1, a workbench 2, an adjustment seat 3, a support frame 4, a transmission system 5, and a negative pressure vacuum pipeline 6. The two groups of docking devices 1 are installed on the workbench 2. The number of workbenches 2 is two sets, one set of workbenches 2 is placed on the adjustment seat 3, and the other set of workbenches 2 is placed under the support frame 4. The workbench 2 is moved by the transmission system 5. The two sets of transmission systems 5 are respectively fixed to the adjustment seat 3 and the support frame 4. The workbench 2 and the support frame 4 are provided with a negative pressure vacuum pipeline 6, which connects the docking device 1 and the vacuum main pipeline.

[0025] Furthermore, the docking device 1 includes a docking block 1a, a docking main warehouse 1b, a first vacuum pipeline 1c, a docking seat 1d, a cylinder 1e, and a cylinder support 1f. The docking block 1a is installed on the docking main warehouse 1b, and the docking main warehouse 1b is placed on the docking seat 1d. It is supported and guided by the wheel axle. The docking seat 1d is connected and fixed to the workbench 2. The cylinder support 1f is fixed to the workbench 2 by bolts. The cylinder 1e is installed on the cylinder support 1f and is connected to the docking main warehouse 1b. The docking main warehouse 1b is provided with an exhaust port, which is connected to the vacuum pipeline of the workbench 2.

[0026] Furthermore, the workbench 2 includes a workbench body 2a, a guide wheel 2b, a movable connecting plate 2c, a connecting shaft 2d, a second vacuum pipeline 2e, and a pneumatic butterfly valve 2f. The connecting shaft 2d is fixed on the workbench body 2a, the movable connecting plate 2c is installed on the connecting shaft 2d, the guide wheel 2b is installed on both sides of the workbench body 2a, the second vacuum pipeline 2e is on one side of the workbench body 2a, and the pneumatic butterfly valve 2f is installed on the second vacuum pipeline 2e.

[0027] Furthermore, the adjustment seat 3 includes a first frame body 3a, a first anti-collision block 3b, a first transmission system mounting seat 3c, and a first chain roller 3d. There is a first anti-collision block 3b at each of the front and rear ends of the first frame body 3a. The first transmission system mounting seat 3c is welded and fixed on the left and right sides of the first frame body 3a, and the first chain roller 3d is welded and fixed in the middle of the first frame body 3a.

[0028] Furthermore, the support frame 4 includes a second frame body 4a, a second anti-collision block 4b, a second transmission system mounting seat 4c, a second chain roller 4d, and a third vacuum pipeline 4e; there is a second anti-collision block 4b at each of the front and rear ends of the second frame body 4a, the second transmission system mounting seat 4c is welded and fixed on the left and right sides of the second frame body 4a, the second chain roller 4d is welded and fixed in the middle of the second frame body 4a, and the third vacuum pipeline 4e is fixed on one side of the support frame 4 and connected to the main pipeline.

[0029] Furthermore, the transmission system 5 includes a reducer 5a, a transmission shaft 5b, a driven shaft 5c, a bearing seat 5d, a sprocket 5e, and a chain 5f. The reducer 5a is connected to the transmission shaft 5b, the transmission shaft 5b is installed on the first transmission system mounting seat 3c and the second transmission system mounting seat 4c through the bearing seat 5d, the sprocket 5e is installed on the transmission shaft 5b, and the chain 5f circulates back and forth between the transmission shaft 5b and the driven shaft 5c through the sprocket 5e.

[0030] Furthermore, the negative pressure vacuum pipeline 6 is a vacuum pipeline that uses a rubber black hose to connect the docking device 1, the workbench 2 and the support frame 4.

[0031] The working principle of the mobile negative pressure automatic docking device is as follows: after receiving the electric control signal, the cylinder controls the movement of the docking device, the docking block is connected to the negative pressure port of the sand box air chamber, and air is continuously extracted to form a vacuum negative pressure in the sand box. Each workbench is equipped with two docking devices, and two sand boxes can be poured at the same time. After the pouring is completed, the sand box moves forward, the transmission system starts at the same time, and the workbench moves forward synchronously with the sand box, extending the negative pressure holding time after pouring. The two workbenches are used alternately, which has higher work efficiency, changes the traditional negative pressure extraction method, extends the sand box pressure holding time after pouring, maintains the stability of the negative pressure in the sand box, prevents the occurrence of sand scouring, stepping box and mold wall movement, increases the discharge speed of the model gasification product, and avoids defects such as sand sticking, air holes, and carbon black in the casting.

[0032] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0033] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A mobile negative pressure automatic docking device for lost foam casting, comprising a docking device (1), a workbench (2), an adjustment seat (3), a support frame (4), a transmission system (5), and a negative pressure vacuum pipeline (6), characterized in that: The two groups of docking devices (1) are installed on a workbench (2). The number of workbenches (2) is two sets, one set of workbenches (2) is placed on the adjustment seat (3), and the other set of workbenches (2) is placed under the support frame (4). The workbench (2) moves via a transmission system (5). The two sets of transmission systems (5) are respectively fixed to the adjustment seat (3) and the support frame (4). The workbench (2) and the support frame (4) are provided with a negative pressure vacuum pipeline (6) connecting the docking device (1) and the vacuum main pipeline.

2. The mobile negative pressure automatic docking device for lost foam casting according to claim 1, characterized in that: The docking device (1) comprises a docking block (1a), a docking main chamber (1b), a first vacuum pipeline (1c), a docking seat (1d), a cylinder (1e), and a cylinder support (1f); the docking block (1a) is mounted on the docking main chamber (1b); the docking main chamber (1b) is placed on the docking seat (1d) and supported and guided by a wheel axle; the docking seat (1d) is connected and fixed to a workbench (2); the cylinder support (1f) is fixed to the workbench (2) by bolts; the cylinder (1e) is mounted on the cylinder support (1f) and connected to the docking main chamber (1b); the docking main chamber (1b) is provided with an air extraction port connected to the vacuum pipeline of the workbench (2).

3. The mobile negative pressure automatic docking device for lost foam casting according to claim 2, characterized in that: The workbench (2) comprises a workbench body (2a), a guide wheel (2b), a movable connecting plate (2c), a connecting shaft (2d), a second vacuum pipeline (2e), and a pneumatic butterfly valve (2f); the connecting shaft (2d) is fixed on the workbench body (2a); the movable connecting plate (2c) is mounted on the connecting shaft (2d); the guide wheel (2b) is mounted on both sides of the workbench body (2a); the second vacuum pipeline (2e) is on one side of the workbench body (2a); and the pneumatic butterfly valve (2f) is mounted on the second vacuum pipeline (2e).

4. The mobile negative pressure automatic docking device for lost foam casting according to claim 1, characterized in that: The adjustment seat (3) comprises a first frame (3a), a first anti-collision block (3b), a first transmission system mounting seat (3c), and a first chain roller (3d); the first frame (3a) has a first anti-collision block (3b) at each of the front and rear ends; the first transmission system mounting seat (3c) is welded and fixed to the left and right sides of the first frame (3a); and the first chain roller (3d) is welded and fixed to the middle of the first frame (3a).

5. The mobile negative pressure automatic docking device for lost foam casting according to claim 4, characterized in that: The support frame (4) comprises a second frame body (4a), a second anti-collision block (4b), a second transmission system mounting seat (4c), a second chain roller (4d), and a third vacuum pipeline (4e); the second frame body (4a) is provided with a second anti-collision block (4b) at each of the front and rear ends; the second transmission system mounting seat (4c) is welded and fixed to the left and right sides of the second frame body (4a); the second chain roller (4d) is welded and fixed to the middle of the second frame body (4a); and the third vacuum pipeline (4e) is fixed to one side of the support frame (4) and connected to the main pipeline.

6. The mobile negative pressure automatic docking device for lost foam casting according to claim 5, characterized in that: The transmission system (5) comprises a speed reducer (5a), a transmission shaft (5b), a driven shaft (5c), a bearing seat (5d), a sprocket (5e), ​​and a chain (5f); the speed reducer (5a) is connected to the transmission shaft (5b); the transmission shaft (5b) is mounted on a first transmission system mounting seat (3c) and a second transmission system mounting seat (4c) via a bearing seat (5d); the sprocket (5e) is mounted on the transmission shaft (5b); and the chain (5f) reciprocates between the transmission shaft (5b) and the driven shaft (5c) via the sprocket (5e).

7. The mobile negative pressure automatic docking device for lost foam casting according to claim 6, characterized in that: The negative pressure vacuum pipeline (6) is a vacuum pipeline that uses a rubber black hose to connect the docking device (1), the workbench (2) and the support frame (4).

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