CN217044183U

CN217044183U - Clamp assembly and skin stretcher

Info

Publication number: CN217044183U
Application number: CN202220704613.3U
Authority: CN
Inventors: 何彬; 戴渊; 朱闪闪; 申发兰
Original assignee: Shanghai Aircraft Manufacturing Co Ltd
Current assignee: Shanghai Aircraft Manufacturing Co Ltd
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2022-07-26
Anticipated expiration: 2032-03-29

Abstract

The utility model belongs to the technical field of stretch forming, a clamp subassembly and covering stretcher is disclosed, two clamp parallels of this clamp subassembly just to setting up, fixed scale on the top surface of at least one clamp, and the scale sets up along the length direction of clamp, set up laser level simultaneously on the top surface of at least one clamp, the laser head of laser level sets up towards offside clamp for the light beam that the laser head sent can overlap with the scale mark on the scale. The clamp assembly utilizes the light beam emitted by the laser level meter to provide a reference for the installation position of the mold, avoids the problem of placing errors caused by the distance between the mold and the clamp, and has the effect of improving the accuracy of the placing position of the mold.

Description

Clamp assembly and skin stretcher

Technical Field

The utility model relates to a stretch forming technical field especially relates to a clamp subassembly and covering stretcher.

Background

Skin pieces are exterior pieces that form and maintain the aerodynamic shape of the aircraft. Stretch forming (drawing for short) is a coating forming process with a die, and is one of the main forming modes of airplane skin parts. During stretch forming, a die is placed at a preset position between two clamps of a skin stretcher, then a sheet is placed on the die, two sides of the sheet are clamped through the clamps, pulling force and bending moment are applied to the sheet by means of relative movement of the die and the clamps, so that the bonding surface of the sheet and the die is gradually expanded, and finally the sheet and the die are completely bonded, and therefore stretch forming of the skin is completed.

Among the prior art, putting of mould is realized through the mode of artifical observation scale: the scale is placed on the clamp, and then whether the end face of one side of the mold is on the same horizontal line with the scale of the scale is observed, so that whether the mold is placed in place is judged.

The uncertainty of the placement position of the die becomes an uncertain factor influencing the skin forming quality, so that the skin stretch forming precision is influenced. Therefore, it is desirable to provide a clamp assembly and a skin stretching machine to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a clamp assembly has the effect that improves the die holding position degree of accuracy.

To achieve the purpose, the utility model adopts the following technical proposal:

a clamp assembly, comprising:

the two clamps are arranged in parallel and oppositely, and the die can be arranged between the two clamps;

the graduated scale is fixed on the top surface of at least one clamp along the length direction of the clamp;

laser level, laser level set up in the top surface of at least one clamp, and laser head of laser level sets up towards offside clamp to the light beam that makes the laser head send can overlap with the scale mark of scale, and a side end face of mould can overlap with the light beam.

Optionally, the two jaws are equal in length, the scale is a bisecting scale, and a zero line of the bisecting scale is aligned with a midpoint position of the jaws.

Optionally, the laser level is removably attached to the clamp.

Optionally, the clamp is made of iron materials, and the laser level meter is provided with a magnet which can be adsorbed on the clamp.

Optionally, the laser level is movably connected to the clamp along the length of the clamp.

Optionally, one of the laser level and the clamp is provided with a sliding groove, and the other is provided with a sliding rail, and the sliding groove is in sliding fit with the sliding rail.

Optionally, the laser level meter further comprises a driving device, and an output end of the driving device is connected to the laser level meter in a driving mode.

Optionally, the laser level and the graduated scale are both disposed on the same clamp, and the distance between the graduated scale and the opposite clamp is less than the distance between the laser level and the opposite clamp.

Optionally, the scale is glued to the clamp.

Another object of the utility model is to provide a covering stretcher can improve the degree of accuracy of die holding position.

the skin stretcher comprises a frame and the clamp assemblies, wherein two clamps of each clamp assembly are movably mounted on the frame respectively.

Has the advantages that:

the utility model provides a clamp assembly, two clamp parallels just to setting up, fixed scale on the top surface of at least one clamp, and the scale sets up along the length direction of clamp, sets up laser level meter simultaneously on the top surface of at least one clamp, and the laser head of laser level meter sets up towards offside clamp to the light beam that makes the laser head send can overlap with the scale mark on the scale. During actual operation, the laser level meter is opened, the light beam emitted by the laser level meter is overlapped with the scale marks on the graduated scale, then the mold is placed between the two clamps, the mold is moved, the end face of one side of the mold is overlapped with the light beam, and the operation of installing the mold at the preset position can be completed. The utility model provides a clamp subassembly utilizes the light beam that the laser level appearance sent, for the mounted position of mould provides the benchmark, has avoided producing the problem of mounted position error because of the distance that exists between mould and the clamp, has the effect that improves the die holding position degree of accuracy, and then can improve the shaping precision that the covering draws shape.

Drawings

FIG. 1 is a schematic diagram of a clamp assembly according to one embodiment.

In the figure:

100. clamping; 200. a graduated scale; 300. a laser level; 400. a gap; 500. and (5) a mould.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Example one

The embodiment provides a clamp assembly, which is mainly applied to a skin stretching machine, two clamps of the clamp assembly are respectively movably mounted on a frame of the skin stretching machine, during stretching operation, a mold is placed between the two clamps, then a sheet is placed on the mold, two sides of the sheet are respectively clamped by the two clamps, then the mold and the clamps move relatively until the sheet is completely attached to the mold, and thus the stretching operation of the skin is completed. The clamp assembly has the effect of improving the accuracy of the placing position of the mold, so that the forming precision of skin stretch forming can be improved to a certain extent.

Specifically, as shown in fig. 1, the clamp assembly includes two clamps 100, a scale 200 and a laser level 300, the two clamps 100 are arranged in parallel and opposite to each other, a mold can be placed between the two clamps 100, the scale 200 is fixed on the top surface of at least one clamp 100 along the length direction of the clamp 100, the laser level 300 is arranged on the top surface of at least one clamp 100, a laser head of the laser level 300 is arranged toward the opposite clamp 100 so that a light beam emitted by the laser head can overlap with a scale line of the scale 200, and one side end surface of the mold between the two clamps 100 can overlap with the light beam.

In actual operation, the laser level 300 is opened to overlap the light beam emitted from the laser level with the scale marks on the scale 200, the mold 500 is placed between the two clamps 100, and the mold 500 is moved to overlap the light beam with the end surface on one side of the mold 500, so that the mold 500 is mounted at the preset position. The clamp assembly provided by the embodiment provides a reference for the installation position of the mold 500 by using the light beam emitted by the laser level meter 300, avoids the problem of installation position error caused by the distance between the mold 500 and the clamp 100, has the effect of improving the accuracy of the installation position of the mold 500, and further can improve the forming precision of skin stretch forming.

Alternatively, the scale 200 may be fixed to only one of the two clamps 100, or one scale 200 may be fixed to each of the two clamps 100 (i.e., the number of scales 200 may be one or two). The laser level 300 may be fixed to only one of the two clamps 100, or one laser level 300 may be fixed to each of the two clamps 100 (i.e., the number of the laser levels 300 may be one or two). In the technical solution provided in this embodiment, the scale 200 is only fixed to one of the two clamps 100 (that is, the number of the scale 200 is one), and the laser level 300 is also only fixed to one of the two clamps 100 (that is, the number of the laser level 300 is one), so that the accuracy of the placement position of the mold 500 is improved, and the overall structure of the clamp assembly is simplified.

Further, as shown in fig. 1, the above-mentioned one scale 200 and one laser level 300 are both disposed on the same clamp 100, and the distance between the scale 200 and the opposite clamp 100 is smaller than the distance between the laser level 300 and the opposite clamp 100, so that the light beam emitted by the laser level 300 can overlap with the scale on the scale 200 in the vertical direction, at this time, because the laser level 300 and the scale 200 are both disposed on the same clamp 100, the distance between the two is short, when observing whether the light beam emitted by the laser level 300 overlaps with the scale at the preset position of the scale 200 in the vertical direction, it can be observed more accurately, and further the accuracy of the placement position of the mold 500 can be further improved.

In one embodiment, the scale 200 and the laser level 300 are respectively disposed on different clamps 100, and at this time, the light beam emitted by the laser level 300 can still be overlapped with the scale on the scale 200 in the vertical direction, and it can be determined whether the laser level 300 is accurately installed by observing whether the light beam emitted by the laser level 300 and the scale on the scale 200 are overlapped in the vertical direction.

Optionally, because the shapes and sizes of the molds 500 of different models are different, the preset positions where the molds 500 of different models are placed are also different, when the molds 500 of different models need to be placed on the same clamp assembly, the laser level 300 and the clamp 100 can be set in a detachable connection mode, the preset position data of the molds 500 of different models are calculated in advance according to various parameters of the different molds 500, or a database of the preset positions of the molds 500 of different models is created on an electronic device such as a computer (the specific method for creating the database is the prior art, and is not described herein in detail), when the molds 500 need to be replaced, the laser level 300 is detached from the previous position of the clamp 100, then a new scale corresponding to the preset position is found on the scale 200, the laser level 300 is opened and moved, so that the light beam emitted by the laser level 300 is emitted into the gap 400 between the two clamps 100, and the light beam is overlapped with the corresponding graduation line of the new preset position on the graduated scale 200, at this moment, the light beam position is the new preset position, and the laser level 300 is installed on the new position.

Further, the clamp 100 is made of iron material, and the laser level 300 is provided with a magnet which can be adsorbed on the clamp 100, so that the detachable connection of the laser level 300 and the clamp 100 is realized. Of course, can also realize being connected with dismantling of clamp 100 through other modes, for example, set up the through-hole on clamp 100, set up the connecting rod on laser level 300, the connecting rod passes the through-hole, and the one end that the through-hole was worn out to the connecting rod is equipped with the external screw thread, and after the through-hole was worn out to the connecting rod, external screw thread and nut threaded connection.

Alternatively, the scale 200 may be adhesively fixed to the clamp 100 in a simple manner with high connection reliability. Of course, the scale 200 can also be fixed on the clamp 100 by welding or the like, which is not illustrated here.

Preferably, the two pliers 100 have the same length, the scale 200 is a bisecting scale, and a zero line of the bisecting scale is aligned with a midpoint of the pliers 100. In actual operation, the middle point position of the clamp 100 is usually used as a reference for placing the mold 500 and the plate, so when the structure is arranged for reading the scale on the graduated scale 200, the numerical value of the scale is directly read from a zero scale at the middle position of the clamp 100, the step of calculating by taking the middle point position scale of the clamp 100 as a calculation zero point is omitted, the operation steps are simplified, the production efficiency is improved, and the problem of low accuracy of the placing position of the mold 500 caused by calculation errors can be solved.

According to the clamp assembly provided by the embodiment, the light beam emitted by the laser level meter 300 is used for providing a reference for the installation position of the mold 500, when the mold 500 is installed, the end face of one side of the mold 500 is overlapped with the light beam emitted by the laser level meter 300, and the accuracy and the reliability of the light beam emitted by the laser level meter 300 are high, so that the accuracy of the placement position of the mold 500 is high, and the forming precision of skin stretch forming can be finally improved. On the other hand, the clamp assembly provided by the embodiment has the advantages that the scale 200 and the laser level 300 are arranged on the clamp 100, so that the accuracy of the placing position of the mold 500 can be improved, the implementation cost is low, and the clamp assembly is suitable for wide popularization and application. In another aspect, the clamp assembly provided by this embodiment, the laser level 300 is detachably connected to the clamp 100, when different molds 500 need to be placed, the laser level 300 is detached from the clamp 100, and then the clamp assembly is installed at a new position, so that the operation is quick and convenient.

The embodiment further provides a skin stretching machine, which comprises a frame and the clamp assemblies, wherein the two clamps 100 of the clamp assemblies are respectively movably mounted on the frame, and the skin stretching machine also has the effect of improving the accuracy of the placing position of the mold 500, so that the skin stretching forming precision can be improved to a certain extent.

Example two

The present embodiment provides a clamp assembly, which differs from the clamp assembly provided in the first embodiment in that:

the laser level 300 is movably connected with the clamp 100 along the length direction of the clamp 100, when the model of the mold 500 needs to be changed, the laser level 300 is moved along the length direction of the clamp 100, and the laser level 300 is moved to a new position, so that the operation steps of the clamp assembly when the mold 500 is changed are further simplified.

Further, in order to realize the movable connection between the laser level 300 and the clamp 100, a sliding groove may be disposed on one of the laser level 300 and the clamp 100, and a sliding rail may be disposed on the other, and both the sliding groove and the sliding rail are disposed along the length direction of the clamp 100, so that the sliding groove and the sliding rail are in sliding fit.

Further, in order to realize the automatic adjustment of the position of the laser level 300, a driving device may be further provided, an output end of the driving device is connected with the laser level 300, and the laser level 300 is driven to move by the driving device.

Alternatively, the driving device may be a reciprocating cylinder, a bidirectional driving motor, or the like, which can drive in two directions on the same straight line.

Alternatively, the driving device may be fixed to the clamp 100 or to the frame of the skin stretching machine.

Optionally, the driving device may be further connected to a controller through a signal, preset position data corresponding to different models of molds 500 and data such as scales of the graduated scale 200 are stored in the controller, when the models of the molds 500 are changed, the corresponding models of molds 500 are selected on the controller, the controller controls the driving device to start according to the data, the driving device controls the laser level 300 to move on the clamp 100, and therefore automatic position adjustment of the laser level 300 is achieved.

The rest of the structure of the clamp assembly provided in this embodiment is the same as that of the first embodiment, and is not described again.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A clamp assembly, comprising:

the two clamps (100) are arranged in parallel and opposite to each other, and the mold (500) can be placed between the two clamps (100);

the graduated scale (200) is fixed on the top surface of at least one clamp (100) along the length direction of the clamp (100);

laser level (300), laser level (300) set up in at least one the top surface of clamp (100), the laser head orientation offside of laser level (300) clamp (100) sets up, so that the light beam that the laser head sent with the scale mark of scale (200) overlaps, a side end face of mould (500) can with the light beam overlaps.

2. The caliper assembly of claim 1 wherein the two calipers (100) are equal in length, the scale (200) is a graduated scale, and the zero line of the graduated scale is aligned with the midpoint position of the caliper (100).

3. The clamp assembly of claim 1, wherein said laser level (300) is removably connected to said clamp (100).

4. The clamp assembly of claim 3, wherein said clamp (100) is made of a ferrous material, and said laser level (300) is provided with a magnet capable of being attracted to said clamp (100).

5. The clamp assembly of claim 1, wherein said laser level (300) is movably connected to said clamp (100) along a length of said clamp (100).

6. The clamp assembly of claim 5, wherein one of said laser level (300) and said clamp (100) is provided with a slide slot and the other is provided with a slide rail, said slide slot and said slide rail being in sliding engagement.

7. The clamp assembly of claim 6, further comprising a drive device, an output of said drive device being drivingly connected to said laser level (300).

8. The clamp assembly according to any one of claims 1-7, wherein the laser level (300) and the scale (200) are both provided on the same clamp (100), and the distance between the scale (200) and the opposite clamp (100) is smaller than the distance between the laser level (300) and the opposite clamp (100).

9. The jaw assembly of any of claims 1-7, wherein said scale (200) is bonded to said jaw (100).

10. Skin stretching machine, comprising a frame and a gripper assembly according to any one of claims 1 to 9, the two grippers (100) of which are each movably mounted on the frame.