CN201324946Y

CN201324946Y - Accurate positioning fixture used for secondary cut of work pieces in numerical control cutting machine

Info

Publication number: CN201324946Y
Application number: CNU2008201449696U
Authority: CN
Inventors: 胡耀宗
Original assignee: Tianjin Heavysteel Mechanical Equipment Co Ltd
Current assignee: Tianjin Heavysteel Mechanical Equipment Co Ltd
Priority date: 2008-12-26
Filing date: 2008-12-26
Publication date: 2009-10-14
Anticipated expiration: 2018-12-26

Abstract

The utility model discloses an accurate positioning fixture used for the secondary cut of a work piece in a numerical control cutting machine, which comprises a supporting seat, a fixation foot plate, and two sets of first positioning structures and one set of second positioning structure at least arranged on the supporting plate of the supporting seat. Each set of first positioning structure comprises a reference positioning block arranged on the supporting plate, a positioning hole formed on the upper end surface of the reference positioning block, a first reference part arranged on one side of the reference positioning block, and a first clamping device arranged in opposite to the first reference part; and the second positioning structure comprises an adjustable positioning block arranged on the supporting plate, a second reference part arranged on one side of the adjustable positioning block and a second clamping device arranged in opposite to the second reference part. The accurate positioning fixture has simple structure and is easy to be implemented; achieves the effect of accurate positioning by controlling the degree of the superposition between the cutting nozzle of the numerical control cutting machine and the reference positioning holes of the fixture without the requirement of fabricating the processing hole; and incorporates the coordinate values after alignment into the numerical-control processing program so as to greatly reduce the processing cost during the batch production.

Description

The accurate positioning clamping fixture that is used for numerical control cutting machine second cutting workpiece

Technical field

The utility model relates to a kind of in the steel construction manufacturing, carries out pinpoint device and localization method thereof to being cut steel plateelement in secondary Numerical control cutting operation.

Background technology

At present, the cutting processing of steel plateelement adopts NC flame cutting machine, numerical control laser cutter or numerical control plasma cutting machine etc. mostly.Some steel plateelement changes other operations processing again if the position that will need to cut by figure all cuts, and causes very big quality problems sometimes, even causes waste product.As the be cut steel plateelement of processing as Fig. 1, Fig. 2 and profile shown in Figure 3 and structure, after being cut hole on the workpiece and sharp processing and finishing, when carrying out bending, being out of shape largely can appear in the hole near the bending part, as shown in Figure 4 and Figure 5, because the gross distortion in this hole, position will make workpiece use.Based on above reason or other technologic needs.Some steel plateelement then needs at first to cut profile with numerical control cutting machine, carries out other operation processing then, at last again with carrying out secondary cut on the numerical control cutting machine.When carrying out secondary cut,, must accomplish accurate localization in order to guarantee the precision of workpiece, but if just utilize the cutting head on the numerical control cutting machine and carry out the location of secondary cut by the appearance profile that is cut steel plateelement, position error is very big, and is not easy to operate, when taking a lot of work very much.

The utility model content

For overcome in the prior art to need the secondary Numerical control cutting be cut steel plateelement accurately locate in position error greatly, the shortcoming in not easy to operate, waste man-hour, the utility model provides a kind of accurate positioning clamping fixture that is used for numerical control cutting machine second cutting workpiece, utilize this positioning clamping fixture, can realize accurate location easily and quickly workpiece before the secondary operations.

In order to solve the problems of the technologies described above, the utility model is used for the technical scheme that the accurate positioning clamping fixture of numerical control cutting machine second cutting workpiece is achieved: comprise and support pedestal and fixing sole, be provided with two cover first location structures and a cover second location structure on the gripper shoe of described support pedestal at least; Described every cover first location structure includes the benchmark locating piece that is arranged on the described gripper shoe, the upper surface of described benchmark locating piece is provided with locating hole, one side of described benchmark locating piece is the first benchmark position, and the opposite at the described first benchmark position is provided with first holding device; Described second location structure comprises the adjustable locating piece that is arranged on the described gripper shoe, and a side of described adjustable locating piece is the second benchmark position, and the opposite at the described second benchmark position is provided with second holding device.

The utility model is used for the accurate positioning clamping fixture of numerical control cutting machine second cutting workpiece, wherein, the contact site that holds out against on described first holding device aligns mutually with the described first benchmark position, and its distance between the two is slightly larger than the distance that is cut on the workpiece profile between first group of corresponding point; The contact site that holds out against on described second holding device aligns mutually with the described second benchmark position, and its distance between the two is slightly larger than the distance that is cut on the workpiece profile between second group of corresponding point.The shape of described locating hole and size match with the numerical control cutting machine cutting head.

Compared with prior art, the beneficial effects of the utility model are: it is simple in structure that the utility model is used for the accurate positioning clamping fixture of numerical control cutting machine second cutting workpiece, be easy to realize, employing overlaps degree by adjustment Numerical control cutting mouth with mold baseline positioning hole center and accurately locatees, need not the manufacture craft hole, the saving of labor, save time, the work efficiency height.Coordinate figure behind the centering is enrolled in the nc program, is a kind of solution that is specially adapted to produce in batches, can save processing cost greatly in batch process.

Description of drawings

Fig. 1 is profile and the structural representation that is cut steel plateelement;

Fig. 2 is the position profile of A-A shown in Fig. 1 figure;

Fig. 3 is the position profile of B-B shown in Fig. 1 figure;

Fig. 4 and Fig. 5 are respectively that structure hole produces the schematic diagram of distortion after adopting existing manufacturing procedure;

Fig. 6 is the vertical view after the utility model is used for the accurate positioning clamping fixture of numerical control cutting machine second cutting workpiece and is cut the accurate location of workpiece;

Fig. 7 is the position of C-C shown in a Fig. 6 cutaway view;

Fig. 8 is the portion of I shown in a Fig. 7 partial structurtes enlarged drawing.

The specific embodiment

Below in conjunction with the drawings and specific embodiments the utility model is done and to be described in further detail.

The explanation of main parts size and details Reference numeral in the Figure of description: 1. support pedestal, 2. fixing sole, 3. gripper shoe, 40,40 ' first group of corresponding point 41. benchmark locating piece, 42. first holding device, 43. locating holes, 44. first benchmark positions, 44 ', 54 ' holds out against the contact site, 50,50 ' second group of corresponding point, 51. adjustable locating pieces, 52. second holding devices, 53. the second benchmark position, 6. be cut workpiece, 7. cutting head, 9,10 lines of centres, 20. first true edge, 30 second true edges

As shown in Figure 6 and Figure 7, the accurate positioning clamping fixture that the utility model is used for numerical control cutting machine second cutting workpiece comprises the fixedly soles 2 that support pedestal 1 and be positioned at four jiaos of places, support pedestal 1 below, is provided with two cover first location structures and a cover second location structure on the gripper shoe 3 of described support pedestal 1 at least; Described every cover first location structure includes the benchmark locating piece 41 that is arranged on the described gripper shoe 3, the upper surface of described benchmark locating piece 41 is provided with locating hole 43, the shape of described locating hole 43 and size match with the numerical control cutting machine cutting head, as shown in Figure 8, this locating hole 43 is bellmouths that match with cutting head 7 lower end profiles.One side of described benchmark locating piece 41 is the first benchmark position 44, and the opposite at the described first benchmark position 44 is provided with first holding device 42; The contact site 44 ' that holds out against on described first holding device 42 aligns mutually with the described first benchmark position 44, and its distance between the two is slightly larger than the distance that is cut on the workpiece profile between first group of

corresponding point

40,40 '.Described second location structure comprises the adjustable locating piece 51 that is arranged on the described gripper shoe 3, one side of described adjustable locating piece 51 is the second benchmark position 53, the opposite at the described second benchmark position 53 is provided with second holding device 52, the contact site 54 ' that holds out against on described second holding device 52 aligns mutually with the described second benchmark position 53, and its distance between the two is slightly larger than the distance that is cut on the workpiece profile between second group of

corresponding point

50,50 '.As shown in Figure 6, by the size that zone (area) on the gripper shoe 3 that contact site 53 limited should be slightly larger than the overall profile that is cut workpiece 6 that holds out against on the contact site 44 ' and second holding device 52 of holding out against on the first benchmark position 44, the second benchmark position 53, first holding device 42 on the mold, after guaranteeing that needs are carried out being cut workpiece 6 and putting into this zone of secondary cut, fix and be cut workpiece 6 by adjusting first holding device 42 and second holding device 52.

As on the gripper shoe 3 of mold, whether needing to be provided with structures such as some grooves, hole, boss, this depends on structure and the features of shape that is cut workpiece, because present embodiment is to be example with the steel plateelement that has the bending part, therefore, on the gripper shoe 3 of mold, to be provided with and be used to pass the groove that is cut the workpiece bending part.As shown in Figure 6 and Figure 7, the supporting surface 3 of described support pedestal 1 is provided with and is used for holding the space that is cut bending part on the workpiece 6, so that place the workpiece that is cut after bending, meanwhile, the benchmark locating piece 41 that is used for carrying out the benchmark location also is designed to the bent plate shape, strengthen benchmark location contact-making surface, to guarantee reliable location.

The effect of first holding device 42, second holding device 52 is to be used for the accurate locating piece 42 of ligand and adjustable locating piece 51 to be cut workpiece 6 to hold out against and to fix in the utility model, can not go out because of thermal deformation to be moved in processed process thereby guarantee to be cut workpiece 6.The structure of above-mentioned first, second holding device is unrestricted, and this is the known general knowledge of those skilled in that art.

In order to guarantee the cutting processing precision of workpiece, preferably the manufacturing procedure of Cai Yonging is: at first cut profile with numerical control cutting machine, carry out other operation processing then, carry out secondary cut at last again on numerical control cutting machine.Present embodiment is to carry out the secondary cut machining hole and groove is an example with the steel plateelement that needs bending to handle, occur to adopt for fear of structure hole or groove occurring on the steel plate: cut hole or the groove of appearance profile---bending---on the secondary cut steel plate owing to bending produces the phenomenon of distortion.Accurate positioning clamping fixture of the present utility model just can be realized easily and quickly the above-mentioned workpiece of secondary operations accurately being located.

To be example, to further describe and utilize the accurate positioning clamping fixture of the utility model to carry out the pinpoint method of numerical control cutting machine second cutting workpiece below as Fig. 1, Fig. 2 and steel plateelement shown in Figure 3.

As shown in Figure 6, at first, be cut setting first true edge 20 and second true edge 30 on the appearance profile of workpiece, described first true edge 20 and second true edge 30 are overlapping relation; The line of centres 9 of determining two first locating holes 43 on the benchmark locating piece 41 is first datum line, and determine second datum line according to being cut on the workpiece 6 hole that needs secondary cut processing or the elements of a fix of groove, be second datum line with the line of centres 10 that is cut two holes on the steel plate in the present embodiment;

Then, after mold being placed into the correct position of saw working bench, to be cut workpiece 6 is placed into by the first benchmark position 44 on the mold, the second benchmark position 53, first holding device 42 hold out against the holding out against in the zone on the gripper shoe 3 that contact site 54 ' limits of the contact site 44 ' and second holding device 52, and first true edge 20 that guarantees to be cut workpiece 6 simultaneously with mold on two first benchmark positions 44 be adjacent to, be cut second true edge 30 of workpiece 6 and be adjacent to, thereby the coordinate that the coordinate of the locating hole 43 on the benchmark locating piece 42 of the coordinate that makes first true edge 20 that is cut workpiece 6 and above-mentioned two covers, first location structure becomes in the same coordinate system concerns with the second benchmark position 53 on the mold;

Alternately aim at the center of the locating hole 43 of two first benchmark locating piece 42 upper surfaces on the mold repeatedly with the cutting head 7 of numerical control cutting machine, to carry out the anastomose property adjustment, adjust to, the line of centres 9 that makes two locating holes 43 is with till a running orbit of numerical control cutting machine cutting head 7 overlaps always; Meanwhile, adjust the position of adjustable locating piece 51 on the mold, second datum line 10 that is cut on the workpiece 6 is intersected with the center of a baseline positioning hole 43 of its homonymy; Then, the centre coordinate value of described two locating holes 43 is enrolled in the secondary cut procedure, and the centre coordinate that makes described two locating holes 43 needs the hole that processes and the elements of a fix of groove to be in the same rectangular coordinate system with being cut on the workpiece;

At last, to be cut workpiece 6 with first holding device 42 and second holding device 52 respectively holds out against fixing, utilize the fixedly sole 2 of accurate positioning clamping fixture should accurate positioning clamping fixture and numerical control cutting machine stationary table, so far, finished the accurate location work of secondary cut workpiece.

To need the carrying out secondary cut hole on steel plateelement is example, when numerical control programming, centre coordinate that is used for carrying out pinpoint taper locating hole 43 and the centre coordinate value that is cut the hole of wanting cutting processing on the workpiece 6 elements of a fix of definite other geometrical forms (or be used for) are organized in the same rectangular coordinate system, during cutting processing, only need before each cutting with Numerical control cutting mouth 7 with enrolled program one of them be used in the pinpoint bellmouth, identical back start-up routine also begins cutting, as long as it is accurate to guarantee that the location adjustment of above-mentioned steps two is done, the positioning accuracy of cutting hole can be very high.

Although in conjunction with the accompanying drawings the utility model has been carried out foregoing description; but the utility model is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment only is schematic; rather than it is restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; under the situation that does not break away from the utility model aim, can also make a lot of distortion, these all belong to the row of protection of the present utility model.

Claims

1. accurate positioning clamping fixture that is used for numerical control cutting machine second cutting workpiece comprises and supports pedestal and fixing sole, it is characterized in that:

At least be provided with two cover first location structures and a cover second location structure on the gripper shoe of described support pedestal;

Described every cover first location structure includes the benchmark locating piece that is arranged on the described gripper shoe, the upper surface of described benchmark locating piece is provided with locating hole, one side of described benchmark locating piece is the first benchmark position, and the opposite at the described first benchmark position is provided with first holding device;

Described second location structure comprises the adjustable locating piece that is arranged on the described gripper shoe, and a side of described adjustable locating piece is the second benchmark position, and the opposite at the described second benchmark position is provided with second holding device.

2. the accurate positioning clamping fixture that is used for numerical control cutting machine second cutting workpiece according to claim 1, it is characterized in that: the contact site that holds out against on described first holding device aligns mutually with the described first benchmark position, and its distance between the two is slightly larger than the distance that is cut on the workpiece profile between first group of corresponding point; The contact site that holds out against on described second holding device aligns mutually with the described second benchmark position, and its distance between the two is slightly larger than the distance that is cut on the workpiece profile between second group of corresponding point.

3. the accurate positioning clamping fixture that is used for numerical control cutting machine second cutting workpiece according to claim 1 is characterized in that: the shape of described locating hole and size match with the numerical control cutting machine cutting head.