阅读说明：本技术 电动工具保护罩的自动焊接装置 (Automatic welding device for electric tool protective cover ) 是由 周行建 林军 李开强 于 2020-05-17 设计创作，主要内容包括：一种电动工具保护罩的自动焊接装置,包括机座,机座上端为操作平台,操作平台下方为电气柜,操作平台上设置工件定位工装,工件定位工装包括固定座,固定座上固定连接工件的定位块,一电极安装柱位于定位块中心,电极安装柱下端穿过固定座与电气柜中的焊接变压器电连接,电极安装柱的上端连接下电极,操作平台上设有多个上电极机构,上电极机构包括驱动气缸、上电极,驱动气缸的活塞通过连接轴与上电极固定连接,各上电极均与焊接变压器电连接；操作平台上设有安装支架,安装支架设有导轨,该导轨滑动配合一滑动座,滑动座固定连接压头,该压头位于定位块上方,安装支架上端固定安装顶压气缸,顶压气缸的活塞与滑动座固定连接。(An automatic welding device for a protective cover of an electric tool comprises a base, wherein an operating platform is arranged at the upper end of the base, an electric cabinet is arranged below the operating platform, a workpiece positioning tool is arranged on the operating platform and comprises a fixed seat, a positioning block of a workpiece is fixedly connected to the fixed seat, an electrode mounting column is positioned in the center of the positioning block, the lower end of the electrode mounting column penetrates through the fixed seat and is electrically connected with a welding transformer in the electric cabinet, a lower electrode is connected to the upper end of the electrode mounting column, a plurality of upper electrode mechanisms are arranged on the operating platform, each upper electrode mechanism comprises a driving cylinder and an upper electrode, a piston of the driving cylinder is fixedly connected with the upper electrode through a connecting shaft, and each; the operating platform is provided with a mounting bracket, the mounting bracket is provided with a guide rail, the guide rail is in sliding fit with a sliding seat, the sliding seat is fixedly connected with a pressure head, the pressure head is positioned above the positioning block, the upper end of the mounting bracket is fixedly provided with a jacking cylinder, and a piston of the jacking cylinder is fixedly connected with the sliding seat.)

1. The utility model provides an automatic welder of electric tool safety cover, includes frame (3), the upper end of frame (3) is operating platform (5), the below of operating platform (5) is regulator cubicle (2), its characterized in that: the operation platform (5) is provided with a workpiece positioning tool, the workpiece positioning tool comprises a fixed seat (6), the fixed seat (6) is fixedly connected with a positioning block (7) of a workpiece, an electrode mounting column (30) is positioned at the center of the positioning block (7), the lower end of the electrode mounting column (30) penetrates through the fixed seat (6) and is electrically connected with a welding transformer (4) arranged in the electrical cabinet (2), the upper end of the electrode mounting column (30) is fixedly connected with a lower electrode (31), the operation platform (5) is provided with a plurality of upper electrode mechanisms, the plurality of upper electrode mechanisms are positioned at the periphery of the lower electrode (31) and distributed in an arc shape, each upper electrode mechanism comprises a driving cylinder (17) and an upper electrode (20), a piston of the driving cylinder (17) is fixedly connected with the upper electrode (20) through a connecting shaft (19), and the extension line of each upper electrode (20) corresponds to the center of the lower electrode (31, each upper electrode (20) is electrically connected with a welding transformer (4) in the electrical cabinet (2); the automatic workpiece pressing device is characterized in that an installing support (8) is arranged on the operating platform (5), a guide rail (12) extending downwards is arranged on the side face of the installing support (8), the guide rail (12) is in sliding fit with a sliding seat (13), a pressing head (14) used for pressing a workpiece is fixedly connected to the lower end of the sliding seat (13), the pressing head (14) is located above the positioning block (7), a pressing cylinder (28) is fixedly installed at the upper end of the installing support (8), and a piston of the pressing cylinder (28) is fixedly connected with the sliding seat (13) through a connecting rod (15) and used for driving the sliding seat (13) to move up and down along the guide rail (12).

2. The automatic welding device for protecting covers of electric tools according to claim 1, characterized in that: the upper end of the positioning block (7) is provided with a cover body side positioning step (7-3), the upper end of the cover body side positioning step (7-3) is provided with a clamp centering boss (7-4) and a clamp angle positioning boss (7-1), the circle center of the positioning block (7) is provided with a cover body centering column (7-2), and the lower electrode (31) is positioned in the cover body centering column (7-2).

3. The automatic welding device for protecting covers of electric tools according to claim 1, characterized in that: the lower part of the mounting bracket (8) is provided with an abdicating opening (8-1) for an upper electrode (20) to pass through.

4. The automatic welding device for protecting covers of electric tools according to claim 1, characterized in that: the cooling device comprises an industrial water chiller and a circulating refrigerating machine (9), and is respectively connected with the circulating water channel arranged on the upper electrode (20) and the electrical cabinet (2) through pipelines.

5. The automatic welding device for protecting covers of electric tools according to claim 1, characterized in that: the driving cylinder (17) and the jacking cylinder (28) both adopt double-layer cylinders.

6. The automatic welding device for protecting covers of electric tools according to claim 1, characterized in that: and a protective frame cover (11) is fixedly arranged at the upper end of the operating platform (5).

7. The automatic welding device for protecting covers of power tools according to claim 6, characterized in that: the top of the protective frame cover (11) is provided with a smoke suction port (11-1), and the smoke suction port (11-1) is connected with a smoke purifier (16) through a pipeline.

8. The automatic welding device for the protective cover of the electric tool is characterized in that the welding controller (10) and the P L C controller are arranged on the protective frame cover (11).

Technical Field

The invention relates to the field of welding, in particular to an automatic welding device for a protective cover of an electric tool.

Background

Generally, a protective cover is installed on an electric tool during use, for example, a hand-held electric angle grinder is used for preventing chips and dust from splashing during cutting, and the chips and dust are prevented from splashing by the installed protective cover. The protection cover is composed of a cover body and a hoop, wherein the Zhao body of the protection cover is generally semicircular, the hoop needs to be welded and fixed on the cover body of the protection cover, after the hoop and the cover body are assembled, three welding positions are usually required to ensure that the fixation is firm, the hoop and the cover body are generally welded by manually positioning the cover body and the hoop by using a clamping fixture at present, the clamping fixture is placed on a projection welding machine electrode to sequentially weld three welding spots, and then a product is taken down from the clamping fixture. This process has a number of disadvantages: the protective cover and the clamp are manually positioned by using a mould, the assembly position and the size precision cannot be ensured, and the product has poor consistency, poor reliability and unstable quality; moreover, the protective cover and the clamp are placed on the mould manually, then the three welding spots are welded on the projection welding machine in sequence, and then the product is taken down from the mould, so that the production beat is 40-45 seconds per piece, and the production efficiency is extremely low.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides an automatic welding device for a protective cover of an electric tool, which can position the protective cover of the electric tool and can perform multipoint simultaneous automatic welding on the protective cover of the electric tool, and the technical scheme of the invention is as follows:

an automatic welding device for a protective cover of an electric tool comprises a machine base, wherein the upper end of the machine base is provided with an operating platform, an electric cabinet is arranged below the operating platform, a workpiece positioning tool is arranged on the operating platform and comprises a fixed seat, the fixed seat is fixedly connected with a positioning block of a workpiece, an electrode mounting column is positioned in the center of the positioning block, the lower end of the electrode mounting column passes through the fixed seat and is electrically connected with a welding transformer arranged in the electric cabinet, the upper end of the electrode mounting column is fixedly connected with a lower electrode, the operating platform is provided with a plurality of upper electrode mechanisms, the upper electrode mechanisms are positioned on the periphery of the lower electrode and distributed in an arc shape, each upper electrode mechanism comprises a driving cylinder and an upper electrode, the piston of the driving cylinder is fixedly connected with the upper electrode through a connecting shaft, the extension line of each upper electrode corresponds to the center of the lower electrode, and each upper electrode is electrically connected with a welding transformer in the electrical cabinet; the workpiece pressing device is characterized in that the operating platform is provided with an installation support, a guide rail extending downwards is arranged on the side face of the installation support, the guide rail is in sliding fit with a sliding seat, the lower end of the sliding seat is fixedly connected with a pressing head used for pressing a workpiece, the pressing head is located above the positioning block, the upper end of the installation support is fixedly provided with a jacking cylinder, and a piston of the jacking cylinder is fixedly connected with the sliding seat through a connecting rod and used for driving the sliding seat to move up and down along the guide rail.

The locating piece upper end is equipped with cover side location step, and cover side location step upper end is equipped with clamp centering boss and clamp angle location boss, and the locating piece centre of a circle is equipped with cover body centering post, the bottom electrode is arranged in cover body centering post.

The lower part of the mounting bracket is provided with an abdicating opening for an upper electrode to pass through.

The cooling device comprises an industrial water chiller and a circulating refrigerator, and is respectively connected with the circulating water channels arranged on the upper electrode and the electrical cabinet through pipelines.

The driving cylinder and the jacking cylinder are both double-layer cylinders.

And a protective frame cover is fixedly arranged at the upper end of the operating platform.

The top of the protective frame cover is provided with a smoke suction port which is connected with a smoke purifier through a pipeline.

And the protective frame cover is provided with a welding controller and a P L C controller.

Adopt above-mentioned technical scheme: comprises a base, an operating platform is arranged at the upper end of the base, an electric cabinet is arranged below the operating platform, the operating platform is provided with a workpiece positioning tool which comprises a fixed seat, the fixed seat is fixedly connected with a positioning block of a workpiece, an electrode mounting column is positioned at the center of the positioning block, the lower end of the electrode mounting column passes through the fixed seat and is electrically connected with a welding transformer arranged in the electric cabinet, the upper end of the electrode mounting column is fixedly connected with a lower electrode, the operating platform is provided with a plurality of upper electrode mechanisms, the upper electrode mechanisms are positioned on the periphery of the lower electrode and distributed in an arc shape, each upper electrode mechanism comprises a driving cylinder and an upper electrode, the piston of the driving cylinder is fixedly connected with the upper electrode through a connecting shaft, the extension line of each upper electrode corresponds to the center of the lower electrode, and each upper electrode is electrically connected with a welding transformer in the electrical cabinet; the workpiece pressing device is characterized in that the operating platform is provided with an installation support, a guide rail extending downwards is arranged on the side face of the installation support, the guide rail is in sliding fit with a sliding seat, the lower end of the sliding seat is fixedly connected with a pressing head used for pressing a workpiece, the pressing head is located above the positioning block, the upper end of the installation support is fixedly provided with a jacking cylinder, and a piston of the jacking cylinder is fixedly connected with the sliding seat through a connecting rod and used for driving the sliding seat to move up and down along the guide rail. Therefore, the hoop and the cover body can be positioned through the positioning block of the workpiece positioning tool, and the hoop and the cover body can be pressed tightly by driving the pressure head through the piston of the jacking cylinder, so that the movement of the hoop and the cover body during welding is avoided; the multipoint simultaneous automatic welding of the electric tool protective cover can be realized through the lower electrode and the upper electrode mechanism distributed on the periphery of the lower electrode in an arc shape. The invention can realize the quick positioning of the hoop and the cover body, the position and the size precision of the assembly of the hoop and the cover body can be ensured, the position and the size consistency of a finished product can be obviously improved, the quality is stable, the reliability is high, the rejection rate is low, the multi-point simultaneous automatic welding can be realized, and the production efficiency is also greatly improved.

The locating piece upper end is equipped with cover side location step, and cover side location step upper end is equipped with clamp centering boss and clamp angle location boss, and the locating piece centre of a circle is equipped with cover body centering post, the bottom electrode is arranged in cover body centering post to fix a position the clamp and the cover body, make clamp and the cover body not take place circumferential direction.

The lower part of the mounting bracket is provided with an abdicating opening for an upper electrode to pass through, so that each device on the operating platform is compactly arranged, and the space is saved.

Still include cooling device, cooling device includes an industry cold water machine, a circulation refrigerator, cooling device passes through the pipeline and is connected with the circulating water channel that upper electrode, regulator cubicle set up respectively, can in time cool off the welding transformer in upper electrode and the regulator cubicle, prevents that equipment from overheated, guarantees normal operating temperature.

A protective frame cover is fixedly mounted at the upper end of the operating platform, so that splashes generated during welding can be blocked, and the safety of a production site is improved.

The top of the protective frame cover is provided with a smoke suction port which is connected with a smoke purifier through a pipeline, so that smoke generated during welding can be sucked away, the environment of a production field is prevented from being polluted, and the health of operators is protected.

The invention is further described with reference to the drawings and the specific embodiments in the following description.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of the machine base, the operation platform and the devices on the operation platform;

FIG. 3 is a cross-sectional view of FIG. 2;

FIG. 4 is a schematic structural view of the operation platform, the workpiece positioning tool and the upper electrode mechanism;

FIG. 5 is a schematic view of a protective cover for a power tool;

FIG. 6 is a spacer block diagram.

Detailed Description

The invention discloses an embodiment of an automatic welding device for a protective cover of an electric tool, which comprises the following steps:

the automatic welding device for the protective cover of the electric tool comprises a machine base 3, a welding controller 10 and a P L C controller, the automatic welding device comprises three groups of welding controllers 10 and a set of P L C controller, the welding controller 10 adopts a KD3-08B microcomputer welding controller, the upper end of the machine base 3 is an operating platform 5, the lower end of the operating platform 5 is an electrical cabinet 2, a workpiece positioning tool is arranged on the operating platform 5, the workpiece positioning tool comprises a fixing seat 6, a positioning block 7 of a workpiece is fixedly connected to the fixing seat 6, the upper end of the positioning block 7 is provided with a hood side positioning step 7-3, the upper end of the hood side positioning step 7-3 is provided with a hood centering boss 7-4 and a hood angle positioning boss 7-1, the positioning block 7-2 is provided with a hood centering column 7-2, the lower electrode 31 is positioned in the hood centering column 7-2 so as to position the hood 1-1 and the hood 1-2, so that the hood 1-1 and 1-2 do not rotate, and the hood 1-2 do not rotate, the rotating, the protective cover 1-2 is connected to a dust-2, the protective cover is connected to a dust-2, the protective hood is installed on a dust-protective hood, the industrial transformer 7, the protective cover is installed on a transformer 7, the hood is installed on a rack 7, the rack is a rack is connected to a rack, the rack 14, the rack is connected to a rack 7, the rack is installed, the rack is a rack is installed, the rack is installed.

The device comprises the operation steps of firstly starting a power supply of the device, starting a circulating refrigerator 9 and a smoke purifier 16, after an operation state display screen 21 on a protective cover 11 displays that an operation state is normal, firstly placing a cover body 1-2 on a positioning block 7 of a workpiece positioning tool to enable the side edge of the cover body 1-2 to be limited by a cover body side positioning step 7-3 on the positioning block 7 to form circumferential fixing for 2s, then sleeving a clamp 1-1 on a clamp centering boss 7-4 and circumferentially fixing through a clamp angle positioning boss 7-1 for 2s, then starting two-hand buttons 23 for 1s, under the control of a welding controller 10 and a P L C controller, driving a pressure head 14 to press a positioned workpiece to be welded to be 1s, then driving a piston of an air cylinder 17 to drive an upper electrode 20 to be welded through a connecting shaft 19 for 1s, then driving the air cylinder 17 and the pressure air cylinder 28 to reset and loosen the workpiece, taking out the workpiece manually, wherein the consumed time of one-time for welding operation is 2+ 1s +2+ 10, and the actual production efficiency is greatly improved compared with the conventional production process that the time of 2+ 1s + 10.