CN111168311A

CN111168311A - Machining and clamping platform of automatic spot welding workstation

Info

Publication number: CN111168311A
Application number: CN202010179218.3A
Authority: CN
Inventors: 时维岭; 吴增盘; 李峻峰; 杨森林; 刘瑶
Original assignee: Tianjin Taizheng Machinery Co ltd
Current assignee: Tianjin Taizheng Machinery Co ltd
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2020-05-19
Anticipated expiration: 2040-03-13
Also published as: CN111168311B

Abstract

The invention provides a processing and clamping platform of an automatic spot welding workstation, which comprises a rack and a jig; the X-direction positioning unit, the Y-direction positioning unit and the Z-direction positioning unit are arranged on the rack, a base is fixed on the rack through X, Y to the positioning units, and the jig is fixed on the base through the Z-direction positioning unit. In the clamping platform provided by the invention, the mounting precision of the base is greatly improved through the fixing structure action in multiple directions, so that the positioning precision of the jig is ensured, a workpiece can obtain higher processing precision, the jig can be quickly locked by controlling the pressure head to move downwards, the locking can be quickly released after the welding is finished, the jig can be conveniently withdrawn, therefore, the workpiece and the jig can be integrally and quickly replaced and mounted, and the production efficiency is effectively improved.

Description

Machining and clamping platform of automatic spot welding workstation

Technical Field

The invention belongs to the technical field of welding equipment, and particularly relates to a machining and clamping platform of an automatic spot welding workstation.

Background

Welding forming equipment is generally fixed mounting in predetermined position, like the welding process workshop, when carrying out welding operation to the work piece, generally all need earlier on the work piece dress card processing platform, later weld process, the tradition way is fixed a position the work piece respectively through multiunit positioning mechanism, although the stability of work piece can be guaranteed, the dress card process is inevitable to have the error, every product usually needs multichannel instrument to process, even weld process, sometimes also can divide into different processes such as first spot welding afterwards skip welding or segmentation welding.

In the prior art, each time of clamping a workpiece brings more or less positioning deviation, and after several working procedures, the accumulated deviation brought by clamping positioning can cause the processing error of the workpiece to be gradually amplified, the stability of processing quality is poor, and the processing precision is difficult to be improved fundamentally. To the higher operating mode of welding (processing) required precision, the unable fine satisfied demand of current facility, the further promotion of product shaping quality has met the bottleneck.

Disclosure of Invention

In view of this, the invention provides a machining and clamping platform of an automatic spot welding workstation, aiming to overcome the defects in the prior art.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a processing and clamping platform of an automatic spot welding workstation,

comprises a frame and a jig; the fixture comprises an X-direction positioning unit, a Y-direction positioning unit and a Z-direction positioning unit which are arranged on a rack, wherein a base is fixed on the rack through X, Y to the positioning units, and the fixture is fixed on the base through the Z-direction positioning unit;

the X-direction positioning unit comprises an active clamping assembly and a passive clamping seat which are oppositely arranged; the active clamping assembly comprises a fixed seat, an active clamping seat is arranged on the fixed seat, and the active clamping seat is adjusted through an X-direction driving mechanism;

the Y-direction positioning unit comprises a Y-direction positioning seat and a clamping assembly, one end of the base is attached to the Y-direction positioning seat and is fixed on the rack by the clamping assembly;

the Z-direction positioning unit comprises a Z-direction driving mechanism and a pressing mechanism driven by the Z-direction driving mechanism, the jig is pressed and fixed on the base by the pressing mechanism, and a positioning assembly which is adjusted in a self-adaptive mode is arranged between the base and the jig.

Further, the base frame comprises a base frame body, a top frame body is fixed on the base frame body through a support frame body, and the base is fixedly arranged on the top frame body; the base frame body is provided with a fork mounting seat.

Furthermore, the Z-direction driving mechanism adopts an electric cylinder, an air cylinder or a hydraulic cylinder.

Furthermore, the middle part of the base is provided with a positioning opening, the clamping assembly comprises a clamping block arranged at the positioning opening, the clamping block is fixed on the base through a connecting piece, and the base is pressed and fixed on the rack through the clamping block.

Further, the clamping block comprises a pressing part and a supporting part on the upper side of the pressing part, and a supporting surface for supporting the jig is arranged at the upper end of the supporting part.

Furthermore, the base positioning surfaces on the passive clamping seat and the active clamping seat are arranged in parallel, and the base positioning surface of the Y-direction positioning seat is vertical to the base positioning surface.

Further, the pressing mechanism comprises an installation seat at the upper end of the Z-direction driving mechanism and a pressure head fixed on the installation seat through a connecting shaft piece; the mounting seat is provided with a mounting hole matched with the connecting shaft piece, the pressure head is provided with a connecting lug, and the connecting lug is provided with a limiting hole matched with the connecting shaft piece; the mounting hole and the limiting hole are polygonal holes.

Furthermore, the limiting hole and the mounting hole are both through holes with rectangular cross sections or through holes with pentagonal cross sections.

Further, the positioning assembly comprises a base block fixed on the upper side of the base and an occlusion block fixed on the lower side of the jig; the upper end of the basic block is provided with a guide surface, and the lower end of the occlusion block is provided with a matching surface matched with the guide surface.

Further, the positioning assembly is disposed below the hold-down mechanism.

Compared with the prior art, the invention has the following advantages:

the workpiece clamping device is reasonable in structural design, a workpiece is fixed on a base plate of the fixture in the machining process, the positioning assembly matched with the base is arranged on the base plate, the fixture only needs to be pressed and fixed in each clamping process, the operation of clamping and fixing the workpiece in multiple directions is avoided, the operation difficulty is low, the efficiency is high, the positioning accuracy is fundamentally guaranteed, the same positioning mode can be adopted in multiple machining procedures, the workpiece and the fixture are in a combined structural form, the workpiece and the fixture only need to be fixed to the fixture, and the positioning deviation is small.

When concrete structure design, through the fixed knot of a plurality of directions constructs the effect, very big improvement the precision of base installation, and then ensured the positioning accuracy of tool, ensured that the work piece can obtain higher machining precision to, move down through the control pressure head, can form the locking to the tool fast, also can accomplish the back at the welding, remove the locking fast, the tool of being convenient for withdraws from, consequently, the work piece can whole quick replacement and installation together with the tool, has effectively improved production efficiency.

Therefore, the fixture can quickly clamp and fix a product to be processed, is particularly applied to a production line, can effectively reduce positioning deviation caused by clamping, further effectively reduces processing errors caused by multiple processes and multiple positioning, and has an obvious effect of improving the processing quality and quality of the product.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the invention without limitation. In the drawings:

FIG. 1 is a front view of the invention;

FIG. 2 is a top view of the present invention;

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

FIG. 4 is a schematic view of an exploded view of the positioning assembly of the structure at A in FIG. 3;

fig. 5 is a schematic view of a portion of a coupling hole structure of a bite block in an embodiment of the invention;

FIG. 6 is a schematic view of a clamping assembly in an embodiment of the invention;

FIG. 7 is a schematic view of an embodiment of the present invention in which the clamping block employs an L-shaped clamping portion;

FIG. 8 is a schematic view of a Z-direction positioning unit in an embodiment of the present invention;

FIG. 9 is a schematic view of the Z-positioning unit with the indenter removed in an embodiment of the present invention;

FIG. 10 is a schematic view of the indenter of the Z-positioning unit in an embodiment of the present invention;

FIG. 11 is a schematic view of a connecting shaft according to an embodiment of the present invention;

FIG. 12 is a schematic view of a connecting shaft mounted on a ram in an embodiment of the invention;

fig. 13 is a schematic view of the fixture in the fixing state according to the embodiment of the present invention.

Detailed Description

It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.

In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.

The invention will be described in detail with reference to the following embodiments with reference to the attached drawings.

A machining and clamping platform of an automatic spot welding workstation is disclosed, as shown in figures 1 to 12,

including frame 1 and tool 2, the work piece installation of treating the processing is fixed on the base plate 53 of tool, it needs to point out that the tool can be a plurality of via holes that begin on the base plate, and each via hole corresponds with the connecting hole on the work piece, passes the via hole connection of base plate and can fix the work piece at the connecting hole through connecting piece (like the screw), and of course, the tool also can include a plurality of heterotypic location structure of arranging on the base plate, as long as can fix the work piece firm, guarantee that the work piece is stable in the course of working.

An X-direction positioning unit 3, a Y-direction positioning unit 4 and a Z-direction positioning unit 5 are arranged on the rack, a base 6 is fixed on the rack through X, Y to the positioning units, and the (substrate of the) jig is fixed on the base through the Z-direction positioning unit;

the X-direction positioning unit comprises an active clamping component 7 and a passive clamping seat 8 which are oppositely arranged; the active clamping assembly comprises a fixed seat 9, an active clamping seat 10 is installed on the fixed seat, the active clamping seat is adjusted through an X-direction driving mechanism 11, the X-direction driving mechanism can adopt an electric cylinder, an air cylinder or a hydraulic cylinder, and can also adopt a device capable of driving the active clamping seat to act, so that the active clamping seat can be adjusted in the X direction;

the Y-direction positioning unit comprises a Y-direction positioning seat 12 and a clamping assembly, one end of the base is attached to the Y-direction positioning seat and is fixed on the rack by the clamping assembly; a base Y-direction positioning surface 13 (the base positioning surface can be the end surface of one side of the vertical plate) for positioning and supporting the base is arranged on the Y-direction positioning seat (towards one side of the clamping assembly), so that the base is accurately positioned and firmly fixed. The base positioning surfaces on the passive clamping seat and the active clamping seat are arranged in parallel, and the base positioning surface of the Y-direction positioning seat is vertical to the X-direction positioning surface 14 of the base provided by the passive clamping seat.

It should be noted that the card installing platform provided by the invention is very basic, the positioning accuracy of the base is ensured, and further the positioning accuracy of the jig on the base is effectively ensured, that is, the fixing accuracy of the jig is ensured from the source, the positioning accuracy of the workpiece fixed on the jig is ensured to be high during automatic production, and the processing quality is also fundamentally ensured.

The Z-direction positioning unit includes a Z-direction driving mechanism 15 and a pressing mechanism 16 driven by the Z-direction driving mechanism. The Z-direction driving mechanism adopts an electric cylinder, an air cylinder or a hydraulic cylinder. The fixture is pressed and fixed on the base by the pressing mechanism, the positioning assembly 17 which is self-adaptively adjusted is arranged between the base and the fixture (for convenience of visual expression, the positioning assembly is shown in a combined form of a foundation block and an occlusion block structure in the attached drawing), before the pressing mechanism presses and fixes the fixture (namely, when the fixture is placed on the base), the fixture and the base are self-adaptively adjusted through the designed positioning assembly, accurate positioning is realized, Z-direction positioning units mainly play a role in limiting the fixture to move up and down, the control principle is simple, and the structural design is ingenious.

Generally, the above-mentioned frame comprises a base frame 18, on which a top frame 20 is fixed by means of a support frame 19, on which the base is fixedly mounted; the chassis body is provided with a fork mounting seat 21, so that the forklift can be used for conveniently forking (or hoisting by a crane and the like), and the clamping platform is convenient to integrally move.

In an alternative embodiment, the base is provided with a positioning notch 22 at the middle part thereof, and the clamping assembly comprises a clamping block 23 arranged at the positioning notch, the clamping block is fixed on the base through a connecting piece 31, and the base is tightly pressed and fixed on the frame through the clamping block.

This dress card platform utilizes Z, Y to carry out effectual location to the X, Y, Z three direction of positioning unit to the base, through once meticulous location operation, can ensure that the base has higher positioning accuracy, later to the course of working of work piece, need not readjustment base, only need utilize Z to positioning unit to compress tightly fixedly to the base plate of tool (can), reduced the degree of difficulty of work piece location, easy and simple to handle, in the batch production process, can show improvement production efficiency. It should be noted that the Y-direction positioning unit can perform Y-axis direction positioning on the base, and meanwhile, can also realize Z-direction fixing, and meanwhile, provides support for installation of the jig.

Specifically, in an alternative embodiment, the clamping block includes a pressing portion 24 and a supporting portion 25 on the upper side of the pressing portion, and a supporting surface 26 for supporting the jig is provided on the upper end of the supporting portion. In a further improved scheme, the pressing part of the clamping block is in an L-shaped structure and comprises a transverse structure 27 and a longitudinal structure 28; the underside of the transverse structure is provided with an oblique pressing surface 29 for abutting against the base, while the side of the longitudinal structure facing the bottom of the positioning opening is designed as an inclined surface, and the bottom of the positioning opening of the base is also designed as a matched inclined surface part 30.

After the connecting piece is screwed by utilizing the screw, the inclined plane of the longitudinal structure is matched with the inclined plane part at the bottom of the positioning opening, the pressing and fixing are carried out, the base is firmly clamped between the Y-direction positioning seat and the longitudinal structure (of the clamping block), the Y-direction fixing and the Z-direction fixing of the base are realized through the clamping block under the matching form of the structure, the fixing of the base is effectively ensured, the positioning is more accurate, and then the foundation is laid for the accurate installation of the jig.

In an alternative embodiment, the pressing mechanism comprises a mounting seat 32 at the upper end of the Z-direction driving mechanism, and a pressure head 34 fixed on the mounting seat through a connecting shaft member 33, wherein the Z-direction driving mechanism is fixed on the base through a connecting seat structure 52; the mounting seat is provided with a mounting hole 35, and the pressure head is provided with a connecting lug 36; a limiting hole 37 matched with the connecting shaft piece is arranged on the connecting lug corresponding to the mounting hole; the mounting hole and the limiting hole are polygonal holes. Generally, the limiting hole and the mounting hole are both through holes with rectangular cross sections (such as through holes with square cross sections) or through holes with pentagonal cross sections.

In this embodiment, the specific structural design of the connecting shaft may be as follows: comprises a shaft body, wherein one end of the shaft body is provided with a limiting plate 42, and one end of the limiting plate, which is different from the shaft body, is provided with a trigger 43. In order to limit the position of the pressure head by using the connecting shaft piece, two polygonal matching shaft sections with polygonal cross sections are arranged on the shaft body at intervals. In addition, a containing hole section with an inner diameter larger than that of the mounting hole is arranged at one end, far away from the trigger side, of the mounting hole of the mounting seat, of the polygonal matching shaft section 44, the depth of the containing hole is larger than the length of the polygonal matching shaft section at the far away from the trigger side, and the inner diameter of the containing hole section is larger than or equal to the maximum edge diameter of the polygonal matching shaft section at the far away from the trigger side, namely, the polygonal matching shaft section at the far away from the trigger side can be contracted in the containing hole section.

It should be noted that the length of the polygonal matching shaft section at the far trigger side and the polygonal matching shaft section 45 at the near trigger side are both larger than the thickness of the corresponding side engaging lug, and the distance between the polygonal matching shaft section at the near trigger side and the polygonal matching shaft section at the far trigger side is just suitable for being respectively matched with the limiting hole on the corresponding side engaging lug, that is, a smooth shaft section 46 is left between the polygonal matching shaft section at the near trigger side and the polygonal matching shaft section at the near trigger side (actually, a smooth shaft section is also left at the side of the polygonal matching shaft section at the far trigger side different from the trigger), when the connecting shaft piece is pushed inwards, the polygonal matching shaft section at the near trigger side is simultaneously matched with the limiting hole on the corresponding side (on the engaging lug) and the mounting hole (on the mounting base), while the polygonal matching shaft section at the far trigger side is matched with the limiting hole on the engaging lug at the other side, at this time, the pressure head is relatively fixed with the mounting base, the pressure head can not rotate by taking the connecting shaft as an axis. And under the condition that the pressing head is fixed, the pressing head is driven downwards through the Z-direction driving mechanism, and the jig is pressed and fixed on the bottom plate.

When the locking to the tool needs to be removed (namely, when the workpiece needing to be processed is installed together with the tool), the trigger is dragged firstly, the connecting shaft piece is pulled out to the outer side for a distance, so that the shaft section is matched with the polygon on the side of the trigger, and when the shaft section is matched with the limiting hole on the corresponding connecting lug and the mounting hole on the mounting seat, the connecting shaft piece only plays a role of shaft connection (only plays a role of the optical axis part, the pressure head can be kept to rotate relative to the mounting seat, and the pressure head can not be separated from the mounting seat), and the effect of limiting rotation is not played on the pressure head any more.

It should be noted that, in order to avoid the too large length of the connecting piece pulled, the anti-dropping plate 47 is installed at the end different from the limiting plate after the connecting shaft piece is assembled, and when the connecting shaft piece is pulled outwards, the anti-dropping plate can effectively prevent the connecting shaft piece from moving over the position, thereby avoiding the possibility of being pulled out directly.

When the connecting shaft piece is installed, the installation hole of the installation seat is matched with the polygonal matching shaft section on the side close to the trigger, so that under the condition that the polygonal matching shaft section on the side close to the trigger is consistent in structure with the polygonal matching shaft section on the side far from the trigger in structure and the outer diameter is the same, the front end (different from one end of the limiting plate) of the connecting shaft piece can conveniently penetrate through the installation seat.

The positioning assembly includes a base block 38 fixed on the upper side of the base and a bite block 39 fixed on the lower side of the base plate of the jig, as shown in fig. 13, in order to avoid confusion and make the representation clearer, the workpiece fixed on the base plate is not shown in the figure; the foundation block upper end (along length direction) is equipped with spigot surface 40 (foundation block upper end wholly is the trapezium structure), is equipped with the fitting surface 41 with spigot surface complex (forms the V-arrangement groove structure at the interlock piece lower extreme) at interlock piece lower extreme. In order to further improve the positioning and adaptive adjustment capability, two lower positioning holes 48 may be formed at the upper end of the base block, and two columnar positioning members 49 may be correspondingly disposed on the engagement block. When the occlusion block is matched with the basic block, the positioning piece is inserted into the positioning hole, so that the auxiliary positioning effect is achieved, and the reliable positioning is ensured.

In a further improved scheme, a connecting hole structure is designed on the occluding block, the connecting hole structure comprises a first connecting hole section 50 on the lower side and a second connecting hole 51 on the upper side, the inner diameter of the first connecting hole section is smaller than that of the second connecting hole, a positioning part is fixed on the first connecting hole section, the second connecting hole is generally reserved and used as a connecting hole for installing and fixing a workpiece, the upper end face of the occluding block is used for supporting the workpiece, and the upper end face of each occluding block is kept horizontal.

Generally, the positioning component is arranged below the pressing mechanism (the pressing head), and the structure stability is better after the pressing head presses the jig. In addition, the length direction of each positioning assembly (foundation block/occlusion block combined structure) is vertical to the length direction of the positioning assembly (foundation block/occlusion block combined structure) adjacent to the positioning assembly in the transverse and longitudinal directions, and effective positioning is formed in the X direction and the Y direction of the jig.

Traditional dress card platform operation is supplementary, and work piece dress card is long for a long time, and the operation is complicated, and the effective live time of welding equipment reduces, is unfavorable for the promotion of efficiency, in addition, because welding equipment is expensive, and the utilization ratio is low in the effective operating time, then can lead to manufacturing cost's increase.

The workpiece and the jig are combined to form a combined structure, the workpiece and the jig are only required to be fixed to the next process, and the positioning deviation is small.

Through the fixed knot of a plurality of directions constructs the effect in this dress card platform, very big improvement the precision of base installation, and then ensured the positioning accuracy of tool, ensure that the work piece can obtain higher machining precision, and, the pressure head can form the locking to the tool fast, also can be after the welding is accomplished, remove the locking fast, the tool of being convenient for withdraws from, therefore, the work piece can whole quick replacement and installation together with the tool, production efficiency has effectively been improved, it is idle to have reduced welding equipment in the during operation, effective activity duration increases, thereby to a certain extent, manufacturing cost is reduced.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, so that any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present invention, should be included in the scope of the present invention.

Claims

1. The utility model provides an automatic change spot welding workstation's processing dress card platform which characterized in that:

2. The machining and clamping platform of the automatic spot welding workstation according to claim 1, characterized in that: the base frame comprises a base frame body, a top frame body is fixed on the base frame body through a support frame body, and the base is fixedly arranged on the top frame body; the base frame body is provided with a fork mounting seat.

3. The machining and clamping platform of the automatic spot welding workstation according to claim 1, characterized in that: the Z-direction driving mechanism adopts an electric cylinder, an air cylinder or a hydraulic cylinder.

4. The machining and clamping platform of the automatic spot welding workstation according to claim 1, characterized in that: the base middle part is equipped with the location opening, clamping component includes the chucking piece that location opening department set up, and this chucking piece passes through the connecting piece to be fixed on the base, is compressed tightly the base by this chucking piece and fixes in the frame.

5. The machining and clamping platform of the automatic spot welding workstation according to claim 1, characterized in that: the clamping block comprises a pressing part and a supporting part on the upper side of the pressing part, and a supporting surface for supporting the jig is arranged at the upper end of the supporting part.

6. The machining and clamping platform of the automatic spot welding workstation according to claim 1, characterized in that: the base positioning surfaces on the passive clamping seat and the active clamping seat are arranged in parallel, and the base positioning surface of the Y-direction positioning seat is vertical to the base positioning surface.

7. The machining and clamping platform of the automatic spot welding workstation according to claim 1, characterized in that: the pressing mechanism comprises a mounting seat at the upper end of the Z-direction driving mechanism and a pressure head fixed on the mounting seat through a connecting shaft piece; the mounting seat is provided with a mounting hole matched with the connecting shaft piece, the pressure head is provided with a connecting lug, and the connecting lug is provided with a limiting hole matched with the connecting shaft piece; the mounting hole and the limiting hole are polygonal holes.

8. The machining and clamping platform of the automatic spot welding workstation according to claim 7, wherein: the limiting hole and the mounting hole are both through holes with rectangular cross sections or through holes with pentagonal cross sections.

9. The machining and clamping platform of the automatic spot welding workstation according to claim 1, characterized in that: the positioning assembly comprises a base block fixed on the upper side of the base and an occlusion block fixed on the lower side of the jig; the upper end of the basic block is provided with a guide surface, and the lower end of the occlusion block is provided with a matching surface matched with the guide surface.

10. The machining and clamping platform of the automatic spot welding workstation according to claim 9, characterized in that: the positioning assembly is disposed below the hold-down mechanism.