Reverse jacking and positioning tool for precise sinking groove machining of long-strip-shaped part

Abstract

The utility model discloses a reverse jacking and positioning tool for precise sinking groove machining of a long-strip-shaped part. Comprising a bottom plate, a pair of stand columns upwards vertically arranged on the bottom plate, a cross beam connected between the tops of the stand columns, a precise positioning face arranged on the lower end face of the cross beam and used for positioning the upper end face of a long-strip-shaped part, and a cutter relieving groove formed in the cross beam in the longitudinal direction of the cross beam and formed in the vertical direction in a penetrating mode. The lifting beam is movably arranged below the cross beam in the vertical direction, the positioning groove is formed in the upper end face of the lifting beam and used for positioning a long-strip-shaped part, and a jacking oil cylinder used for driving the lifting beam to move vertically is arranged between the bottom plate and the lifting beam. The precision of precision countersunk groove machining of the long-strip-shaped part is improved.

Description

Technical Field

[0001] This utility model relates to the field of machining process equipment technology, specifically to a reverse pressing positioning fixture for precision sinking machining of long strip parts. Background Technology

[0002] like Figure 4 The image shows a long, narrow part 22 used in a certain household appliance. It is produced in large batches. The upper surface of this long, narrow part 22 has a precision groove 23 formed longitudinally. The depth of the bottom of this precision groove 23 from the upper surface is required to be significant. Conventional processing involves positioning the lower surface of the part, pressing the upper surface with a pressure plate, and then performing precision groove machining. The problem with this process is that the blank of the long, narrow part may have shape and dimensional accuracy errors on its upper and lower surfaces. In addition, the unevenness of the lower surface can cause deformation errors after clamping, easily leading to uneven precision groove depth and out-of-tolerance dimensional accuracy in the machined part.

[0003] Therefore, it is necessary to improve existing processing methods to solve the above problems. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a reverse pressing positioning fixture for precision countersinking of elongated parts, aiming to improve the accuracy of precision countersinking of elongated parts. The specific technical solution is as follows:

[0005] A reverse top-pressing positioning fixture for precision grooving of long strip parts includes a base plate, a pair of upright columns on the base plate, a crossbeam connected between the tops of the pair of columns, a precision positioning surface on the lower end face of the crossbeam for positioning the upper end face of the long strip part, a tool-relief groove formed on the crossbeam along its longitudinal direction and extending vertically through it, a lifting beam movable vertically below the crossbeam, a positioning groove formed on the upper end face of the lifting beam for positioning the long strip part, and a top-pressing cylinder for driving the lifting beam to move vertically between the base plate and the lifting beam.

[0006] Preferably, a number of guide columns are vertically arranged facing downwards on the lower end of the crossbeam, and a number of guide holes are provided on the lifting beam. The lifting beam moves vertically by slidingly engaging with the guide columns through the guide holes.

[0007] In this invention, the crossbeam is provided with guide post mounting holes, and the guide post is installed in the guide post mounting holes and fixed by washers and screws.

[0008] In this utility model, the base plate, a pair of columns, and the crossbeam are connected in an integrated manner in sequence.

[0009] Preferably, there are multiple top-pressing cylinders; the multiple top-pressing cylinders are synchronous top-pressing cylinders.

[0010] As a further improvement of the present invention, a through chip removal groove is provided on the bottom surface of the positioning groove on the lifting beam to facilitate the cleaning of iron filings.

[0011] Preferably, a chip blower is provided on the lower end face of the crossbeam for blowing away iron filings in the positioning groove of the lifting beam.

[0012] Preferably, the chip blower includes a pair of compressed air passages arranged longitudinally within the crossbeam, and two rows of chip blowing holes arranged longitudinally along the lower end face of the crossbeam and connected to the compressed air passages. The two rows of chip blowing holes are located on both sides of the tool relief groove and are obliquely pointing towards the inside of the positioning groove.

[0013] The compressed air passage is connected to a compressed air source.

[0014] The compressed air passage of the crossbeam is provided with a cover plate at one end and a pipe joint at the other end, and the pipe joint is connected to the compressed air source through a hose.

[0015] As a further improvement, the reverse pressing positioning fixture for precision sinking of long strip parts of this utility model is also provided with a part ejector to facilitate the removal of the part from the positioning groove of the lifting beam. The part ejector includes a pair of ejector cylinders disposed on the base plate, and the piston rods of the pair of ejector cylinders are positioned upwards directly below the chip removal groove of the lifting beam.

[0016] Preferably, the ejector cylinder is a synchronous ejector hydraulic cylinder or a synchronous ejector pneumatic cylinder.

[0017] In this utility model, the base plate has protrusions on both sides for easy fixing of the base plate to the worktable of the precision machining equipment, and bolt holes are provided on the protrusions.

[0018] In use, the reverse pressure positioning fixture is installed on the worktable of the finishing equipment. After the elongated part is positioned and clamped, the machining depth of the cutting tool is adjusted and set. The cutting tool on the finishing equipment is then activated, and after the tool extends into the relief groove, precision grooving of the elongated part is performed. To ensure machining accuracy, the cutting depth can be adjusted and set through trial cutting and measurement of the first part. Once properly adjusted, no further measurement or adjustment is required during subsequent machining.

[0019] The beneficial effects of this utility model are:

[0020] First, this utility model provides a reverse pressing positioning fixture for precision sinking of long strip parts. The long strip part is positioned with its upper end face as a reference and is pressed against the lower end face of the crossbeam to achieve reverse pressing positioning. This eliminates the accumulated error caused by conventional positioning with the lower end face of the part, resulting in high positioning accuracy and thus improving the precision of sinking of long strip parts.

[0021] Secondly, the reverse pressing positioning fixture of this utility model for precision grooving of long strip parts has separate positioning of the long strip parts in the horizontal direction and in the vertical direction. This is beneficial to ensure the positioning accuracy of the end face of the part, while the positioning groove is set on the lifting beam, which facilitates the placement of the part in the positioning groove.

[0022] Third, the reverse pressing positioning fixture of this utility model for precision grooving of long strip parts has a chip blower on the crossbeam, which can automatically clean up the iron chips that fall into the positioning groove in time, thus improving the reliability of the reverse pressing positioning fixture.

[0023] Fourth, the reverse pressing positioning fixture of this utility model for precision sinking of long strip parts is equipped with a part ejector, which can quickly eject the parts after processing, thereby further improving the production efficiency of precision sinking of long strip parts. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the reverse pressing positioning tool for precision grooving of long strip parts according to this utility model;

[0025] Figure 2 yes Figure 1 Top view;

[0026] Figure 3 yes Figure 2 AA broken view;

[0027] Figure 4 This is a structural diagram of a long strip-shaped part.

[0028] In the diagram: 1. Base plate, 2. Column, 3. Crossbeam, 4. Tool groove, 5. Lifting beam, 6. Positioning groove, 7. Top pressure cylinder, 8. Guide column, 9. Guide hole, 10. Chip removal groove, 11. Chip blower, 12. Compressed air passage, 13. Chip blowing hole, 14. Guide column mounting hole, 15. Washer, 16. Screw, 17. Cover plate, 18. Pipe joint, 19. Ejector cylinder, 20. Boss, 21. Bolt hole, 22. Long strip part, 23. Precision sink, 24. Precision positioning surface. Detailed Implementation

[0029] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0030] like Figures 1 to 4 The illustration shows an embodiment of the elongated part of this utility model, including a base plate 1, a pair of upright columns 2 erected on the base plate 1, a crossbeam 3 connecting the tops of the pair of upright columns 2, a precision positioning surface 24 on the lower end face of the crossbeam 3 for positioning the upper end face of the elongated part 22, a tool relief groove 4 formed along the longitudinal direction of the crossbeam 3 and extending through the crossbeam in the vertical direction, a lifting beam 5 moved vertically below the crossbeam 3, a positioning groove 6 formed on the upper end face of the lifting beam 5 for positioning the elongated part 22, and a top pressure cylinder 7 for driving the lifting beam 5 to move up and down between the base plate 1 and the lifting beam 5.

[0031] Preferably, a number of guide columns 8 are vertically arranged facing downwards on the lower end of the crossbeam 3, and a number of guide holes 9 are provided on the lifting beam 5. The lifting beam 5 moves in the vertical direction through the sliding connection between the guide holes 9 and the guide columns 8.

[0032] In this embodiment, the crossbeam 3 is provided with guide post mounting holes 14, and the guide post 8 is installed in the guide post mounting holes 14 and fixed by washers 15 and screws 16.

[0033] In this embodiment, the base plate 1, a pair of columns 2, and the crossbeam 3 are connected in an integrated manner in sequence.

[0034] Preferably, there are multiple top-pressing cylinders 7; the multiple top-pressing cylinders 7 are synchronous top-pressing cylinders.

[0035] As a further improvement of the present invention, a through chip removal groove 10 is provided on the bottom surface of the positioning groove 6 on the lifting beam 5 to facilitate the cleaning of iron filings.

[0036] Preferably, a chip blower 11 is provided on the lower end face of the crossbeam 3 for blowing away iron filings in the positioning groove 6 of the lifting beam 5.

[0037] Preferably, the chip blower 11 includes a pair of compressed air passages 12 arranged longitudinally within the crossbeam 3, and two rows of chip blow holes 13 arranged longitudinally on the lower end face of the crossbeam 3 and connected to the compressed air passages 12. The two rows of chip blow holes 13 are located on both sides of the tool relief groove 4 and are obliquely pointing towards the inside of the positioning groove 6.

[0038] The compressed air passage 12 is connected to a compressed air source.

[0039] The compressed air passage 12 of the crossbeam 3 is provided with a cover plate 17 at one end and a pipe joint 18 at the other end. The pipe joint 18 is connected to the compressed air source through a hose.

[0040] As a further improvement, the reverse pressing positioning fixture for precision sinking of long strip parts in this embodiment is also provided with a part ejector to facilitate the removal of the part from the positioning groove 6 of the lifting beam 5. The part ejector includes a pair of ejector cylinders 19 disposed on the base plate 1, with the piston rods of the pair of ejector cylinders 19 pointing upwards and directly below the chip discharge groove 10 of the lifting beam 5.

[0041] Preferably, the ejector cylinder 19 is a synchronous ejector hydraulic cylinder or a synchronous ejector pneumatic cylinder.

[0042] In this embodiment, the base plate 1 is connected to two sides with bosses 20 to facilitate fixing the base plate 1 to the workbench of the precision machining equipment, and the bosses 20 are provided with bolt holes 21.

[0043] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A reverse pressing positioning fixture for precision countersinking of long strip parts, characterized in that, The device includes a base plate, a pair of upright columns on the base plate, a crossbeam connecting the tops of the pair of columns, a precision positioning surface on the lower end face of the crossbeam for positioning the upper end face of a long strip-shaped part, a tool-relief groove formed on the crossbeam along its longitudinal direction and extending vertically through it, a lifting beam positioned below the crossbeam and movable vertically, a positioning groove formed on the upper end face of the lifting beam for positioning the long strip-shaped part, and a top-pressure cylinder for driving the lifting beam to move up and down between the base plate and the lifting beam.

2. The reverse pressing positioning fixture for precision countersinking of long strip parts according to claim 1, characterized in that, The lower end of the crossbeam is provided with a number of guide columns facing downwards, and the lifting beam is provided with a number of guide holes. The lifting beam moves up and down through the sliding connection between the guide holes and the guide columns.

3. The reverse pressing positioning fixture for precision countersinking of long strip parts according to claim 1, characterized in that, The base plate, a pair of columns, and the crossbeam are connected in an integrated manner.

4. The reverse pressing positioning fixture for precision countersinking of long strip parts according to claim 1, characterized in that, There are multiple top-pressing cylinders; the multiple top-pressing cylinders are synchronous top-pressing cylinders.

5. The reverse pressing positioning fixture for precision countersinking of long strip parts according to claim 1, characterized in that, A through chip removal groove is provided on the bottom surface of the positioning groove on the lifting beam to facilitate the cleaning of iron filings.

6. The reverse pressing positioning fixture for precision countersinking of long strip parts according to claim 5, characterized in that, A chip blower is provided on the lower end face of the crossbeam for blowing away iron filings in the positioning groove of the lifting beam.

7. A reverse pressing positioning fixture for precision countersinking of long strip parts according to claim 6, characterized in that, The chip blower includes a pair of compressed air passages arranged longitudinally within the crossbeam, and two rows of chip blowing holes arranged longitudinally along the lower end face of the crossbeam and connected to the compressed air passages. The two rows of chip blowing holes are located on both sides of the tool relief groove and are obliquely pointing towards the inside of the positioning groove.

8. The reverse pressing positioning fixture for precision countersinking of long strip parts according to claim 7, characterized in that, The compressed air passage is connected to a compressed air source.

9. A reverse pressing positioning fixture for precision countersinking of elongated parts according to claim 7, characterized in that, It is also equipped with a part ejector to facilitate the removal of parts from the positioning groove of the lifting beam. The part ejector includes a pair of ejector cylinders disposed on the base plate, with the piston rods of the pair of ejector cylinders facing upwards and directly below the chip discharge groove of the lifting beam.

10. A reverse pressing positioning fixture for precision countersinking of long strip parts according to claim 9, characterized in that, The ejector cylinder is either a synchronous ejector hydraulic cylinder or a synchronous ejector pneumatic cylinder.

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