Precise punching positioning jig

Abstract

The precise punching positioning jig comprises a main body plate connected with a machine tool, and the main body plate is provided with a bottom supporting mechanism used for bearing a to-be-machined workpiece and a top pressing mechanism used for pressing the edge of the upper surface of the to-be-machined workpiece; the bottom supporting mechanism comprises a first telescopic part, the fixed end of the first telescopic part is installed on the front side of the main body plate through a first supporting plate, the telescopic end of the first telescopic part is connected with a second supporting plate through a limiting assembly, and a bearing table is installed on the upper surface of the second supporting plate; the top pressing mechanism comprises a second telescopic part, the fixed end of the second telescopic part is movably connected to one side of the main body plate, the telescopic end of the second telescopic part is movably connected with a pressing plate, and the bottom of the pressing plate is movably connected with the top of the main body plate through a third supporting plate; the lower portion of the free end of the pressing plate is detachably and fixedly connected with a pressing plate used in cooperation with the bearing table. The pressing device has the beneficial effects of being compact in structure, easy and convenient to operate, accurate in positioning, good in pressing effect and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to punch processing auxiliary equipment technical field especially, relate to a precision punching positioning fixture. BACKGROUND

[0002] In modern industrial production, punching process is widely used in the processing of various metal, plastic and other material plates to meet the forming, connecting and other needs in product manufacturing process. However, the traditional punching process has many problems: on the one hand, the positioning accuracy of the workpiece to be processed is difficult to guarantee, and the workpiece is prone to displacement during punching, resulting in punching position deviation, high scrap rate, and great waste of raw materials and processing cost; on the other hand, the workpiece lacks stable and reliable fixing method during punching, especially under high-speed punching operation, the loosening of the workpiece not only affects the punching quality, but also may cause safety hazards, causing harm to the operator. In addition, some simple fixing devices cannot adapt to workpieces of different sizes and shapes, and have poor universality, and a large amount of time is spent on re-adjusting the equipment every time the workpiece type is changed, which seriously affects the production efficiency. SUMMARY

[0003] The utility model mainly aims at the problems of poor workpiece positioning accuracy, poor fixing and poor universality in the prior art, and provides a precision punching positioning fixture.

[0004] The purpose of the utility model is mainly realized through the following scheme:

[0005] The precision punching positioning fixture comprises a main plate connected with a machine tool, a bottom support mechanism for bearing a workpiece to be processed and a top pressing mechanism for pressing the edge of the upper surface of the workpiece to be processed are installed on the main plate;

[0006] The bottom support mechanism comprises a first telescopic piece, the fixed end of the first telescopic piece is installed on the front side of the main plate through a first support plate, the telescopic end of the first telescopic piece is connected with a second support plate through a limiting assembly, the upper surface of the second support plate is installed with a bearing table, and a through hole is vertically formed in the bearing table;

[0007] The top pressing mechanism comprises a second telescopic piece, the fixed end of the second telescopic piece is movably connected to one side of the main plate, and the telescopic end of the second telescopic piece is movably connected with a pressing plate, the bottom of the pressing plate is movably connected with the top of the main plate through a third support plate, the free end of the pressing plate is movably connected with a pressing plate matched with the bearing table, and the pressing plate is hollow.

[0008] As preferred, the limiting assembly comprises a support sleeve, a support guide rod and a fourth support plate, the telescopic end of the first telescopic piece is fixedly connected with the lower surface of the fourth support plate, the upper surface of the fourth support plate is vertically connected with at least one support guide rod, the support sleeve is fixedly installed on the front side of the main plate, and a sliding hole for the support guide rod to pass through is formed in the support sleeve, the support guide rod is slidingly connected in the sliding hole, and the upper surface of the support guide rod is connected with the second support plate.

[0009] As preferred, the side portion of the second support plate is connected with an adjusting block, a plurality of first adjusting holes are vertically and uniformly distributed on the adjusting block, a first locking bolt is matched in the first adjusting hole, and the carrying table is detachably fixedly connected with the side portion of the adjusting block through the first locking bolt.

[0010] As preferred, the adjusting block is in an L-shaped structure, a plurality of second adjusting holes are transversely and uniformly distributed on the bottom portion of the adjusting block, a second locking bolt is matched in the second adjusting hole, and the adjusting block is detachably fixedly connected with the side portion of the second support plate through the second locking bolt.

[0011] As preferred, the bottom portion of the pressing plate is provided with a limiting block, a limiting pad is arranged below the upper surface of the main plate, and a limiting groove matched with the bottom portion of the limiting block is arranged on the upper surface of the limiting pad.

[0012] As preferred, a plurality of third adjusting holes are transversely and uniformly distributed on the free end of the pressing plate, a third locking bolt is matched in the third adjusting hole, and the upper portion of the pressing plate is detachably fixedly connected with the pressing plate through the third locking bolt.

[0013] As preferred, the pressing plate is in a vertically arranged U-shaped plate, and the opening of the pressing plate faces the bottom portion supporting mechanism.

[0014] Therefore, compared with the prior art, the utility model has the following advantages:

[0015] (1) The utility model discloses a bottom portion supporting mechanism and a top portion pressing mechanism cooperate to accurately limit the upper and lower surfaces and the edge of the workpiece to be processed, effectively prevent the displacement of the workpiece in the punching process, ensure the punching position precision, greatly reduce the scrap rate and improve the product quality.

[0016] (2) The limiting assembly of the bottom portion supporting mechanism and the pressing plate and the third support plate of the top portion pressing mechanism are connected in the utility model, so that the workpiece can be stably fixed when punching, even under high-speed and high-frequency punching operation, the workpiece can be prevented from loosening, and the stability and safety of the machining process are ensured.

[0017] (3) The utility model discloses a replaceable and convenient adjustment's bearing station and compression plate are set up to make the fixture can quickly adapt to different thickness, size's workpiece to be processed, and each workpiece can correspond a set of bearing station and compression plate, and the production efficiency is improved, and the production cost is reduced without frequently replacing fixture or carrying out complex debugging.

[0018] (4) The utility model discloses a limiting block and limiting pad are set up, can prevent over compression and make workpiece be damaged, and the qualified rate of finished product is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure schematic view of the utility model,

[0020] Figure 2 It is another angle structure schematic view of the utility model,

[0021] Figure 3 It is the front view of the utility model,

[0022] Figure 4 It is the side view of the utility model.

[0023] Illustration: 1 - main body board, 2 - workpiece to be processed, 3 - bottom support mechanism, 4 - top compression mechanism, 5 - first telescopic part, 6 - first support plate, 7 - second support plate, 8 - bearing station, 9 - through hole, 10 - second telescopic part, 11 - compression plate, 12 - third support plate, 13 - compression plate, 14 - support sleeve, 15 - support guide rod, 16 - fourth support plate, 17 - sliding hole, 18 - adjusting block, 19 - first adjusting hole, 20 - second adjusting hole, 21 - limiting block, 22 - limiting pad, 23 - limiting groove, 24 - third adjusting hole. DETAILED DESCRIPTION

[0024] The technical scheme of the utility model will be further explained in detail below by specific embodiments and in conjunction with the drawings. It should be understood that the implementation of the utility model is not limited to the following examples, and any form of variation and / or change of the utility model will fall within the scope of protection of the utility model.

[0025] In the utility model, if not specified, all the parts, percentages are weight units, and the equipment and raw materials used can be purchased from the market or commonly used in the art. The methods in the following examples are conventional methods in the art unless otherwise specified. The components or equipment in the following examples are general standard components or components known to those skilled in the art unless otherwise specified. Their structure and principle are known to the skilled person through technical manuals or conventional experimental methods.

[0026] Example 1:

[0027] As Figure 1 、 3 , 4, the utility model provides a technical scheme, precision punching positioning fixture, including with lathe connection's main body board 1, main body board 1 is as the basis of entire fixture load bearing component, provides installation platform for other mechanism, and ensure that the stable installation of fixture on lathe, main body board 1 is installed with the bottom support mechanism 3 for carrying the workpiece 2 of being processed and the top pressure mechanism 4 for pressing the upper surface edge of workpiece 2 of being processed, and the two mechanisms work cooperatively, from the two directions of up and down, workpiece 2 is positioned, guarantee that workpiece does not occur displacement in the punching process.

[0028] The bottom support mechanism 3 includes a first telescopic member 5, which can be a hydraulic cylinder, a pneumatic cylinder or an electric push rod, etc., capable of providing accurate linear driving, the fixed end of the first telescopic member 5 is installed on the front side of the main body plate 1 through a first support plate 6, ensuring the stability of its installation, the telescopic end of the first telescopic member 5 is connected with a second support plate 7 through a limiting assembly, the limiting assembly includes a support sleeve 14, a support guide rod 15 and a fourth support plate 16, the telescopic end of the first telescopic member 5 is fixedly connected with the lower surface of the fourth support plate 16 through bolts, at least one support guide rod 15 is vertically connected with the upper surface of the fourth support plate 16, two support guide rods 15 are provided in the embodiment, the support sleeve 14 is fixedly installed on the front side of the main body plate 1 through bolts, and a sliding hole 17 for the support guide rod 15 to pass through is formed on the support sleeve 14, the support guide rod 15 is slidingly connected in the sliding hole 17, the upper surface of the support guide rod 15 is connected with the second support plate 7, through this design, when the first telescopic member is telescoped, the support guide rod slides in the sliding hole of the support sleeve, which can not only guide the second support plate to move up and down stably, but also prevent it from deviating, ensuring the accuracy and stability of movement; a bearing table 8 is installed on the upper surface of the second support plate 7, and a through hole 9 is vertically formed on the bearing table 8, which is used for avoiding the punching tool during punching to avoid interference between the tool and the bearing table.

[0029] The top pressure mechanism 4 includes a second telescopic member 10, which can also be a hydraulic cylinder, a pneumatic cylinder or an electric push rod, etc., the fixed end of the second telescopic member 10 is movably connected to one side of the main body plate 1, and the telescopic end of the second telescopic member 10 is movably connected with a pressure plate 11 through a rotating shaft, the bottom of the pressure plate 11 is rotatably connected with the top of the main body plate 1 through a third support plate 12, and the free end of the pressure plate 11 is detachably fixedly connected with a pressure plate 13 used in cooperation with the bearing table 8, the inside of the pressure plate 13 is hollow, which can limit the workpiece 2 to be processed and facilitate feeding and discharging.

[0030] Embodiment 2:

[0031] As Figure 1 、 2As shown, this utility model provides another technical solution: a precision punching positioning fixture. The difference from embodiment 1 is that the side of the second support plate 7 is connected to an adjusting block 18. The adjusting block 18 has an L-shaped structure, with multiple first adjusting holes 19 evenly distributed vertically on its upper part. Each first adjusting hole 19 is fitted with a first locking bolt. The support platform 8 is detachably and fixedly connected to the side of the adjusting block 18 via the first locking bolt. Multiple second adjusting holes 20 are evenly distributed horizontally on its bottom, with second locking bolts fitted inside each second adjusting hole 20. The adjusting block 18 is detachably and fixedly connected to the side of the second support plate 7 via the second locking bolt. By setting the adjusting block 18, the vertical and horizontal positions of the support platform 8 can be easily adjusted to adapt to workpieces of different thicknesses and sizes, greatly improving the fixture's versatility. On the other hand, it also facilitates the replacement of the support platform 8. During specific processing, a matching support platform 8 and clamping block 13 can be designed for each workpiece's parameters.

[0032] Example 3:

[0033] like Figure 1 , 2 As shown, this utility model provides another technical solution, a precision punching positioning fixture, which differs from embodiment 1 in that a limiting block 21 is fixed at the bottom of the pressure plate 11, and a limiting pad 22 is fixed on the upper surface of the main body plate 1 below the limiting block 21. The upper surface of the limiting pad 22 is provided with a limiting groove 23 that matches the bottom of the limiting block 21. Through the cooperation of the limiting block 21 and the limiting groove 23, the downward stroke of the pressure plate 11 is further limited, preventing excessive pressing from damaging the workpiece.

[0034] Specifically, the free end of the pressure plate 11 has multiple third adjustment holes 24 evenly distributed laterally. Each third adjustment hole 24 is fitted with a third locking bolt. The upper part of the pressure plate 13 is detachably and fixedly connected to the pressure plate 11 through the third locking bolt, which makes it easy to replace the pressure plate of different specifications according to the shape and size of the workpiece, so as to meet diverse processing needs.

[0035] Specifically, the clamping plate 13 is a vertically arranged U-shaped plate with its opening facing the bottom support mechanism 3, which facilitates the punching operation.

[0036] The following describes the working process of this application, taking the processing of standard rectangular metal sheets as an example:

[0037] 1. Preparation

[0038] The precision punching positioning jig is installed on the punching machine through the main plate 1, according to the thickness of the rectangular metal sheet to be processed, the height of the bearing table 8 of the bottom support mechanism 3 is adjusted, the second locking bolt on the side adjusting block 18 of the second support plate 7 is loosened, the adjusting block 18 is moved transversely along the second support plate 7 to the appropriate position, so that the bearing table 8 can fully support the bottom surface of the sheet, then the second locking bolt is tightened, and then according to the size of the sheet, the appropriate pressing plate 13 is selected, and the pressing plate 13 is fixed on the pressing plate 11 through the third locking bolt at the free end of the pressing plate 11.

[0039] 2、Workpiece installation

[0040] The rectangular metal sheet is placed on the bearing table 8, the edges of the sheet are aligned with the edges of the bearing table 8, the first telescopic part 5 is started, the telescopic end of the first telescopic part 5 is extended, driving the second support plate 7 to rise until the bearing table 8 lifts the sheet to the predetermined height, at this time the punching position on the sheet corresponds to the punching path of the machine tool punching tool.

[0041] 3、Press the workpiece

[0042] The second telescopic part 10 is started, the telescopic end of the second telescopic part 10 pushes the pressing plate 11 to move downward, the limiting block 21 at the bottom of the pressing plate 11 descends along the limiting groove 23 of the limiting pad 22 on the main plate 1, when the pressing plate 13 contacts the edge of the upper surface of the sheet, continue to press a certain stroke, so that the sheet is firmly pressed on the bearing table 8, ready for punching operation.

[0043] 3、Punching processing

[0044] The machine tool starts the punching program, and the punching tool performs punching operation on the sheet in turn, due to the precise positioning and stable clamping of the jig on the sheet, the punching process proceeds smoothly, the punching position precision is high, and the sheet has no displacement and loosening phenomenon.

[0045] 4、Processing is completed

[0046] After punching is completed, the telescopic end of the second telescopic part 10 is retracted, driving the pressing plate 11 to rise, loosening the pressing of the sheet, the telescopic end of the first telescopic part 5 is retracted, the bearing table 8 is lowered, the processed sheet is taken out, and the next round of processing is prepared.

[0047] The precision punching positioning jig provided by the utility model, through cooperation of the bearing table 8 of the bottom supporting mechanism 3 and the pressing plate 13 of the top pressing mechanism 4, the upper and lower surfaces and the edge of the workpiece 2 to be processed are accurately limited, the displacement of the workpiece in the punching process is effectively prevented, the punching position precision is ensured, the waste rate is greatly reduced, and the product quality is improved; the connection of the pressing plate 11 and the third supporting plate 12 of the top pressing mechanism 4 and the limiting assembly of the bottom supporting mechanism 3 makes the workpiece be stably fixed when punching, even under high-speed and high-frequency punching operation, the workpiece can be ensured not to be loose, and the stability and safety of the machining process are ensured; through the bearing table 8 and the pressing plate 13 which are replaceable and convenient to adjust, the jig can quickly adapt to workpieces to be processed with different thicknesses and sizes, each kind of workpiece can correspond to a group of bearing tables 8 and pressing plates 13, the jig does not need to be frequently replaced or complicatedly debugged, the production efficiency is remarkably improved, and the production cost is reduced; through the limiting block 21 and the limiting pad 22, the workpiece can be prevented from being damaged due to excessive pressing, and the qualified rate of finished products is improved.

[0048] It should be understood that the embodiments are only used for illustrating the utility model and not for limiting the scope of the utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the appended claims of the application.

Claims

1. A precision punching positioning jig comprising a main plate (1) connected to a machine tool, characterized in that: The main body plate (1) is provided with a bottom supporting mechanism (3) for bearing the workpiece (2) to be processed and a top pressing mechanism (4) for pressing the upper edge of the workpiece (2) to be processed. The bottom supporting mechanism (3) comprises a first telescopic piece (5), the fixed end of the first telescopic piece (5) is installed on the front side of the main body plate (1) through a first supporting plate (6), the telescopic end of the first telescopic piece (5) is connected with a second supporting plate (7) through a limiting assembly, the upper surface of the second supporting plate (7) is provided with a bearing table (8), and a through hole (9) is vertically formed in the bearing table (8). The top pressing mechanism (4) comprises a second telescopic piece (10), the fixed end of the second telescopic piece (10) is movably connected to one side of the main body plate (1), and the telescopic end of the second telescopic piece (10) is movably connected with a pressing plate (11), the bottom of the pressing plate (11) is movably connected with the top of the main body plate (1) through a third supporting plate (12), and the free end of the pressing plate (11) is detachably and fixedly connected with a pressing plate (13) matched with the bearing table (8) at the lower part, and the inside of the pressing plate (13) is hollow.

2. The precision piercing positioning jig of claim 1, wherein: The limiting assembly comprises a supporting sleeve (14), a supporting guide rod (15) and a fourth supporting plate (16), the telescopic end of the first telescopic piece (5) is fixedly connected with the lower surface of the fourth supporting plate (16), at least one supporting guide rod (15) is vertically connected with the upper surface of the fourth supporting plate (16), the supporting sleeve (14) is fixedly installed on the front side of the main body plate (1), and a sliding hole (17) is formed in the supporting sleeve (14) for the supporting guide rod (15) to pass through, the supporting guide rod (15) is slidably connected in the sliding hole (17), and the upper surface of the supporting guide rod (15) is connected with the second supporting plate (7).

3. The precision piercing positioning jig of claim 2, wherein: The side of the second supporting plate (7) is connected with an adjusting block (18), a plurality of first adjusting holes (19) are vertically and uniformly distributed on the adjusting block (18), a first locking bolt is matched in the first adjusting hole (19), and the bearing table (8) is detachably and fixedly connected with the side of the adjusting block (18) through the first locking bolt.

4. The precision piercing positioning jig of claim 3, wherein: The adjusting block (18) is in L-shaped structure, and a plurality of second adjusting holes (20) are transversely and uniformly distributed on the bottom of the adjusting block (18), a second locking bolt is matched in the second adjusting hole (20), and the adjusting block (18) is detachably and fixedly connected with the side of the second supporting plate (7) through the second locking bolt.

5. The precision piercing fixture of claim 1, wherein: The bottom of the pressing plate (11) is provided with a limiting block (21), the upper surface of the main body plate (1) is located below the limiting block (21) and is provided with a limiting pad (22), and the upper surface of the limiting pad (22) is provided with a limiting groove (23) matched with the bottom of the limiting block (21).

6. The precision piercing positioning jig of claim 5, wherein: The free end of the pressing plate (11) is transversely and uniformly provided with a plurality of third adjusting holes (24), a third locking bolt is matched in the third adjusting hole (24), and the upper part of the pressing plate (13) is detachably and fixedly connected with the pressing plate (11) through the third locking bolt.

7. The precision piercing fixture of claim 6, wherein: The pressing plate (13) is a vertically arranged U-shaped plate, and the opening of the pressing plate (13) faces the bottom supporting mechanism (3).

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