CN106583902B

CN106583902B - Projection welding nut pressure arm device

Info

Publication number: CN106583902B
Application number: CN201710038835.XA
Authority: CN
Inventors: 颜剑航
Original assignee: Guangzhou Songxing Electric Co ltd
Current assignee: Guangzhou Songxing Electric Co ltd
Priority date: 2017-01-19
Filing date: 2017-01-19
Publication date: 2022-04-01
Anticipated expiration: 2037-01-19
Also published as: CN106583902A

Abstract

The invention discloses a projection welding nut pressurizing arm device which comprises an upright post, a guide plate, a fixing block, a soft copper strip, a rolling bearing, an insulating plate A, a shaft supporting seat, a rotating shaft, an oilless bushing, a pressurizing arm, an insulating plate B, a lower conductive platform, an upper conductive platform and a lower electrode, wherein the upright post is vertically connected with one end of the upper surface of the lower conductive platform through a bolt, one side of the upright post and the guide plate are fixedly connected with the side surface of the top of the upright post through a bolt and a pin, the insulating plate B is arranged between the upright post and the lower conductive platform, and the other end of the upper surface of the lower conductive platform is provided with the lower electrode; the front end of the lower surface of the upper conductive platform is fixed with a connecting shaft supporting seat through a bolt, an insulating plate A is fixedly arranged between the upper conductive platform and the shaft supporting seat, and the shaft supporting seat is connected with a rotating shaft on the pressurizing arm through an oilless bushing. This practicality is through improving the structure, practices thrift production time, saves the cost of labor to improve the survival rate efficiency.

Description

Projection welding nut pressure arm device

Technical Field

The invention relates to the field of welding, in particular to a projection welding nut pressure arm device.

Background

The pressurizing arm device is used for projection welding of U-shaped or U-shaped parts. In the traditional structure (as shown in figure 1), the pressurizing arm can only move up and down through the air cylinder on the welding machine, and due to the shape of the workpiece, the distance between the clamp of the workpiece and the pressurizing arm is too close, the space is insufficient, and manual workpiece feeding is quite inconvenient, so that the production efficiency is influenced. In the originally improved structure (as shown in fig. 2), the pressurizing arm can move back and forth by adding a translation cylinder, the assembly space is satisfied, but the new mechanism also lengthens the production cycle, increases the cost and has a non-optimal structure.

Disclosure of Invention

The invention aims to provide a projection welding nut pressurizing arm device with simple structure and high production efficiency, which aims to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme:

a projection welding nut pressurizing arm device comprises an upright post, a guide plate, a fixed block, a soft copper strip, a rolling bearing, a shaft supporting seat, a rotating shaft, an oilless bushing, a pressurizing arm, a lower conductive platform, an upper conductive platform and a lower electrode, wherein the upright post is vertically connected to one end of the upper surface of the lower conductive platform through a bolt; the front end of the lower surface of the upper conductive platform is fixedly connected with a connecting shaft supporting seat through a bolt, a shaft supporting seat is connected with a rotating shaft on a pressurizing arm through an oilless bushing, the side surface of the pressurizing arm is fixedly connected with a fixed block, and the side surface of the fixed block is connected in a guide groove formed in a guide plate in a rolling manner through a rolling bearing; the upper conductive platform is connected with one end of the soft copper strip, and the other end of the soft copper strip is connected with the pressurizing arm.

As a further scheme of the invention: and an insulating plate B is arranged between the upright post and the lower conductive platform.

As a further scheme of the invention: an insulating plate A is fixedly arranged between the upper conductive platform and the shaft supporting seat.

As a further scheme of the invention: two oilless bushings are installed through transition fit of the pressurizing arm and are in clearance fit with the rotating shaft.

As a further scheme of the invention: and shaft limiting plates are arranged at two ends of the shaft supporting seat, and the movement and the relative rotation of two sides of the rotating shaft are limited by the shaft limiting plates.

Compared with the prior art, the invention has the beneficial effects that:

this practicality is through improving the structure for overall structure is simple, practices thrift production time simultaneously, saves the cost of labor, thereby improves production efficiency.

Drawings

FIG. 1 is a view showing a structure of a conventional pressurizing arm;

in the figure: the device comprises an upper conductive loop 100, a lower conductive loop 101, a pressurizing mechanism 102, a clamp limit 103 and a pressurizing arm 104.

FIG. 2 is a view showing the structure of a primary modified pressurizing arm;

in the figure: the device comprises a horizontal push cylinder 200, a limiting block 201, a voltage arm 202, an electrode seat 203 and a sliding rail assembly 204;

FIG. 3 is a schematic structural view of the present invention;

in the figure: the device comprises an upright post 1, a guide plate 2, a fixed block 3, a soft copper belt 4, a rolling bearing 5, an insulating plate A6, a shaft supporting seat 7, a rotating shaft 8, an oilless bushing 9, a shaft limiting plate 10, a pressurizing arm 11, an insulating plate B12, a lower conductive platform 13, an upper conductive platform 14 and a lower electrode 15.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 3, in the embodiment of the present invention, a projection nut pressure arm device includes an upright post 1, a guide plate 2, a fixed block 3, a soft copper strip 4, a rolling bearing 5, an insulating plate a6, a shaft support 7, a rotating shaft 8, an oilless bushing 9, a shaft limiting plate 10, a pressure arm 11, an insulating plate B12, a lower conductive platform 13, an upper conductive platform 14, and a lower electrode 15, where the upright post 1 is vertically connected to one end of an upper surface of the lower conductive platform 13 through a bolt, one side of the guide plate 2 is fixedly connected to a top side surface of the upright post 1 through a bolt and a pin, the insulating plate B12 is disposed between the upright post 1 and the upper conductive platform 13, and the lower electrode 15 is mounted at the other end of the upper surface of the lower conductive platform 13.

The front end of the lower surface of the upper conductive platform 14 is fixedly connected with the shaft supporting seat 7 through a bolt, an insulating plate A6 is fixedly arranged between the upper conductive platform 14 and the shaft supporting seat 7, the shaft supporting seat 7 is connected with a rotating shaft 8 on the pressurizing arm 11 through an oilless bushing 9, so that the pressurizing arm 11 can rotate, the side surface of the pressurizing arm 11 is fixedly connected with the fixed block 3, and the side surface of the fixed block 3 is connected in a guide groove formed in the guide plate 2 through a rolling bearing 5 in a rolling manner.

Two oilless bushings 9 are installed on the pressurizing arm 11 in a transition fit mode, and are in clearance fit with the rotating shaft 8, and the two oilless bushings can rotate relatively.

Two ends of the shaft supporting seat 7 are provided with shaft limiting plates 10, and the movement and the relative rotation of two sides of the rotating shaft 8 are limited through the shaft limiting plates 10.

The upper conductive platform 14 is connected with one end of the soft copper strip 4, and the other end of the soft copper strip 4 is connected with the pressurizing arm 11.

The working principle of the invention is as follows:

after the workpiece and the nut are clamped, the pressurizing arm 11 and the connecting piece thereof are limited by the guide groove of the guide plate 2 in the process of pressing down and moving along with the upper conductive platform 14, the pressurizing arm 11 starts to rotate around the rotating shaft 8 to a position right above the lower electrode 15 while moving downwards, and then the pressurizing arm moves downwards to compress the nut for welding. The welding current is communicated with the pressure arm 11 through the soft copper strip 4 and is not influenced by the motion of the pressure arm 11. The stand 1 is isolated through insulation board (12) with lower electrically conductive platform 13, avoids welding circuit reposition of redundant personnel to influence welding effect.

Under the condition that the ordinary pressure arm is opened, the pressure arm device has enough space and can quickly clamp workpieces. Through the action of a pressurizing cylinder of the resistance welding machine, the pressurizing arm 11 can quickly and effectively compress a workpiece nut and position the workpiece nut. Welding current is transmitted to the pressurizing arm 11 from the upper conductive platform 14 through the soft copper strip 4, then transmitted to the workpiece nut, and then transmitted to the lower electrode 15 to form a current loop so as to realize welding.

The pressurizing arm is guided by the guide groove, and the state that the pressurizing arm can only move up and down is changed, so that the pressurizing arm is prevented from interfering with a workpiece and the space for assembling the workpiece is effectively increased; and the pressure arm does not need to add extra power, so the invention effectively overcomes the defects of the prior art by improving the structure.

The workpiece which is 5KG heavy and 500mm long and is a nut is of an improved structure, and the takt time of workpiece production is 15S. Compared with the figure 1, the fixing and pressurizing method is adopted, and the manual assembling time is influenced due to the fact that the space between the clamp limiting block and the voltage arm is insufficient, and the 3S assembling time can be increased. Compared with fig. 2, although the air cylinder translation is adopted to obtain the fitting space, the air cylinder translation time of 1S is increased, the structure is complex, and the material cost is increased by 20%.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A projection welding nut pressurizing arm device comprises an upright post, a guide plate, a fixed block, a soft copper strip, a rolling bearing, an insulating plate A, a shaft supporting seat, a rotating shaft, an oil-free bush, a pressurizing arm, an insulating plate B, a lower conductive platform, an upper conductive platform and a lower electrode, and is characterized in that the upright post is vertically connected to one end of the upper surface of the lower conductive platform through a bolt, one side of the guide plate is fixedly connected to the side surface of the top of the upright post through the bolt and a pin, the insulating plate B is arranged between the upright post and the lower conductive platform, and the lower electrode is installed at the other end of the upper surface of the lower conductive platform; the front end of the lower surface of the upper conductive platform is fixedly connected with a connecting shaft supporting seat through a bolt, an insulating plate A is fixedly arranged between the upper conductive platform and the shaft supporting seat, the shaft supporting seat is connected with a rotating shaft on a pressurizing arm through an oilless bushing, the side surface of the pressurizing arm is fixedly connected with a fixed block, and the side surface of the fixed block is connected in a guide groove formed in a guide plate in a rolling manner through a rolling bearing; the upper conductive platform is connected with one end of the soft copper strip, and the other end of the soft copper strip is connected with the pressurizing arm.

2. A projection nut pressure arm apparatus according to claim 1, wherein said pressure arm is fitted with two oilless bushings by transition fit and clearance fit with the rotating shaft.

3. The projection nut pressure arm apparatus according to claim 1, wherein shaft limiting plates are installed at both ends of the shaft support base, and movement and relative rotation of both sides of the rotation shaft are limited by the shaft limiting plates.