Milling machine positioning jig

Abstract

The utility model relates to the technical field of milling machines, and discloses a milling machine positioning jig which comprises a workbench, a positioning mechanism is arranged on one side of the workbench, servo motors are installed on the two sides, adjacent to the positioning mechanism, of the workbench, and output shafts of the two servo motors are in transmission connection with threaded rods. A limiting plate is welded to the upper surface of the workbench. Through cooperation of a positioning mechanism, a limiting plate, a controller, a servo motor and a clamping plate, a mold is fixed in the horizontal direction through the positioning mechanism, the stability of a push plate is improved through a first guide rod, the pressure during clamping is detected through a pressure sensor, an air cylinder is stopped through the controller, and the situation that the mold is damaged due to the too large clamping pressure is avoided; and meanwhile, the two sets of servo motors are used for positioning the mold in the vertical direction, so that the mold positioning stability is improved, the mold positioning device is suitable for positioning molds of different specifications, and the application range is widened.

Description

Technical Field

[0001] The utility model relates to the technical field of milling machines, in particular to a positioning fixture for milling machines. Background Art

[0002] Milling machines mainly refer to machine tools that use milling cutters to process various surfaces of workpieces. Usually, the milling cutter mainly moves in rotation, and the movement of the workpiece and the milling cutter is the feed motion. It can process planes, grooves, various curved surfaces, gears, etc. Milling machines are machine tools that use milling cutters to mill workpieces.

[0003] During the machining process, the mold is mainly clamped and positioned by a fixed table. However, since the specifications of the molds to be processed are different, the positions of workpieces of different specifications in the vertical and horizontal directions are different. The fixed table cannot achieve such precise positioning, and it is necessary to rely on the workers' previous experience to judge. However, this inevitably leads to large errors, and the scrap rate of the mold will increase. Therefore, we need to propose a milling machine positioning fixture. Utility Model Content

[0004] The purpose of the utility model is to provide a milling machine positioning fixture to improve the positioning effect of the positioning device on the mold, which is suitable for positioning molds of different specifications and reduces the scrap rate of the mold. At the same time, the positioning effect is good and the mold can be processed conveniently to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a positioning fixture for a milling machine, comprising a workbench, a positioning mechanism being provided on one side of the workbench, servo motors being installed on both sides of the workbench adjacent to the positioning mechanism, and the output shafts of the two sets of servo motors being transmission-connected to threaded rods, a limit plate being welded to the upper surface of the workbench, and the limit plate being symmetrically arranged with the positioning mechanism;

[0006] The positioning mechanism includes a fixed plate, and a cylinder is installed on one side of the fixed plate, the telescopic rod of the cylinder passes through the fixed plate and is welded with a push plate, and the push plate is arranged parallel to the fixed plate, and two groups of connecting blocks are welded on one side of the fixed plate, and two groups of first guide rods are plugged into one side of the fixed plate, and one end of the two groups of first guide rods are respectively threadedly connected to the two groups of connecting blocks, and the other ends of the two groups of first guide rods are welded with limiting blocks, and one end side walls of the two groups of first guide rods are provided with internal threads, and the two groups of connecting blocks are respectively provided with screw holes on the side opposite to the push plate for threaded connection of the two groups of first guide rods.

[0007] Preferably, the positioning mechanism further includes multiple groups of fixing bolts, multiple groups of through holes are opened on one side of the fixing plate, and the multiple groups of fixing bolts respectively pass through the multiple groups of through holes and are fixedly connected to the workbench, and a first pad is bonded to the opposite side of the push plate and the two groups of connecting blocks.

[0008] Preferably, a second pad is bonded to one side of the limit plate, and a mounting groove for installing a pressure sensor is opened on one side of the second pad. A controller is installed on the lower surface of the workbench, and the controller is electrically connected to the pressure sensor.

[0009] Preferably, two groups of first guide grooves and four groups of second guide grooves are symmetrically provided on the upper surface of the workbench, and the four groups of second guide grooves are symmetrically arranged on both sides of the two groups of first guide grooves, and the two groups of first guide grooves and the four groups of second guide grooves are arranged in a rectangular array.

[0010] Preferably, a second guide rod is installed in each of the four groups of second guide grooves, the second guide rod is slidably connected to a slider, two groups of threaded rods are respectively installed in the two groups of first guide grooves, and the two groups of threaded rods are threadedly connected to threaded blocks.

[0011] Preferably, two groups of clamping plates are symmetrically arranged on the upper surface of the workbench, and the lower surfaces of the two groups of clamping plates are respectively welded to the threaded blocks and the two groups of sliders, and the threaded block is arranged between the two groups of sliders.

[0012] Preferably, a third pad is bonded to the opposite side of the two groups of clamping plates, and the two groups of clamping plates are respectively arranged vertically and offset with the limit plate and the push plate, and the controller is electrically connected to the two groups of servo motors respectively.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The utility model mainly fixes the mold in the horizontal direction through the positioning mechanism through the cooperation between the positioning mechanism, the limit plate, the controller, the servo motor and the clamping plate. The first guide rod improves the stability of the push plate, and the pressure during clamping is detected by the pressure sensor. The cylinder is stopped by the controller to avoid damage to the mold due to excessive clamping pressure, thereby reducing the scrap rate of the mold. At the same time, two sets of servo motors position the mold in the vertical direction, thereby improving the stability of the mold positioning. It is suitable for positioning molds of different specifications, increasing the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the upper surface structure of the working bar of the utility model;

[0016] Figure 2 This is a schematic diagram of the positioning mechanism structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the clamping plate structure of the present utility model.

[0018] In the figure: 1. workbench; 2. positioning mechanism; 21. fixing plate; 22. cylinder; 23. push plate; 24. first pad; 25. connecting block; 26. first guide rod; 27. limit block; 28. fixing bolt; 29. ​​through hole; 3. limit plate; 31. second pad; 4. pressure sensor; 5. first guide groove; 6. second guide groove; 7. second guide rod; 8. servo motor; 81. threaded rod; 9. clamping plate; 10. controller; 11. third pad; 12. threaded block; 13. slider. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1-3 The utility model provides a technical solution: a milling machine positioning fixture, comprising a workbench 1, a positioning mechanism 2 is provided on one side of the workbench 1, servo motors 8 are installed on both sides adjacent to the workbench 1 and the positioning mechanism 2, and the output shafts of the two sets of servo motors 8 are both transmission-connected with threaded rods 81, a limit plate 3 is welded on the upper surface of the workbench 1, and the limit plate 3 is symmetrically arranged with the positioning mechanism 2;

[0021] The positioning mechanism 2 includes a fixed plate 21, and a cylinder 22 is installed on one side of the fixed plate 21. The telescopic rod of the cylinder 22 passes through the fixed plate 21 and is welded with a push plate 23, and the push plate 23 is arranged parallel to the fixed plate 21. Two groups of connecting blocks 25 are welded on one side of the fixed plate 21, and two groups of first guide rods 26 are inserted on one side of the fixed plate 21. One end of the two groups of first guide rods 26 are respectively threadedly connected to the two groups of connecting blocks 25, and the other ends of the two groups of first guide rods 26 are welded with limiting blocks 27, and one end side walls of the two groups of first guide rods 26 are provided with internal threads, and the two groups of connecting blocks 25 are respectively provided with screw holes on the opposite side of the push plate 23 for threaded connection of the two groups of first guide rods 26.

[0022] During use, the mold is placed on the upper surface of the workbench 1, and the cylinder 22 is started by external remote control to extend its telescopic rod, so that one side of the mold is in contact with the second pad 31 on the side of the limit plate 3. The two sets of first guide rods 26 improve the stability of the push plate 23 when moving, and are easy to disassemble and assemble. They can be replaced according to the specifications of the mold. At the same time, the pressure sensor 4 detects that the clamping pressure reaches the pressure value, thereby transmitting a signal to the controller 10. The controller 10 controls the cylinder 22 to extend and stop extending, so as to avoid damage to the mold due to excessive clamping pressure and reduce the scrap rate of the mold, thereby improving the positioning effect during mold processing, and starts the two sets of servo motors 8 to drive the threaded rod 81 to rotate, thereby converting the rotation between the threaded rod 81 and the threaded block 12 into the relative movement of the two sets of clamping plates 9, thereby clamping the other two sides of the mold, thereby improving the positioning effect of the mold.

[0023] The positioning mechanism 2 also includes multiple groups of fixing bolts 28. Multiple groups of through holes 29 are opened on one side of the fixing plate 21. The multiple groups of fixing bolts 28 respectively pass through the multiple groups of through holes 29 and are fixedly connected to the workbench 1. The first pad 24 is bonded to the opposite side of the push plate 23 and the two groups of connecting blocks 25. The multiple groups of fixing bolts 28 facilitate the quick disassembly and assembly of the fixing plate 21, and facilitate the replacement of the positioning mechanism 2.

[0024] A second pad 31 is bonded to one side of the limit plate 3, and a mounting groove for installing the pressure sensor 4 is opened on one side of the second pad 31. A controller 10 is installed on the lower surface of the workbench 1, and the controller 10 is electrically connected to the pressure sensor 4. The pressure sensor 4 detects the clamping pressure of the push plate 23 and the limit plate 3 on the mold, and then the cylinder 22 is controlled to stop through the controller 10 to avoid damage to the mold due to excessive clamping pressure.

[0025] Two groups of first guide grooves 5 and four groups of second guide grooves 6 are symmetrically provided on the upper surface of the workbench 1, and the four groups of second guide grooves 6 are symmetrically arranged on both sides of the two groups of first guide grooves 5. The two groups of first guide grooves 5 and the four groups of second guide grooves 6 are arranged in a rectangular array. The first guide grooves 5 and the second guide grooves 6 facilitate the sliding connection between the threaded block 12 and the slider 13, thereby facilitating the clamping and positioning of the other two sides of the mold, thereby improving the positioning effect of the mold.

[0026] A second guide rod 7 is installed in each of the four groups of second guide grooves 6, and the second guide rod 7 is slidably connected to a slider 13. Two groups of threaded rods 81 are respectively installed in the two groups of first guide grooves 5, and the two groups of threaded rods 81 are threadedly connected to the threaded blocks 12. The second guide rod 7 improves the stability of the slider 13 when sliding, thereby improving the stability of the two groups of clamping plates 9 in clamping the mold.

[0027] Two groups of clamping plates 9 are symmetrically arranged on the upper surface of the workbench 1. The lower surfaces of the two groups of clamping plates 9 are welded to the threaded blocks 12 and the two groups of sliders 13 respectively, and the threaded blocks 12 are arranged between the two groups of sliders 13. The welding is used to improve the firmness of the clamping plates 9, the threaded blocks 12 and the sliders 13, to avoid the threaded blocks 12 and the clamping plates 9 from breaking due to excessive clamping force, and to improve their service life.

[0028] A third pad 11 is bonded to the opposite side of the two groups of clamping plates 9, and the two groups of clamping plates 9 are respectively arranged vertically with the limit plate 3 and the push plate 23 in an offset manner. The controller 10 is electrically connected to the two groups of servo motors 8 respectively. The two groups of servo motors 8 are controlled by the controller 10. Compared with manually turning the crank, the labor of the staff is reduced and the processing efficiency is improved.

[0029] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A milling machine positioning fixture, comprising a workbench (1), characterized in that: A positioning mechanism (2) is provided on one side of the workbench (1), servo motors (8) are installed on both sides of the workbench (1) adjacent to the positioning mechanism (2), and the output shafts of the two sets of servo motors (8) are both transmission-connected to threaded rods (81), and a limit plate (3) is welded on the upper surface of the workbench (1), and the limit plate (3) and the positioning mechanism (2) are symmetrically arranged; The positioning mechanism (2) includes a fixed plate (21), and a cylinder (22) is installed on one side of the fixed plate (21), the telescopic rod of the cylinder (22) passes through the fixed plate (21) and is welded with a push plate (23), and the push plate (23) is arranged in parallel with the fixed plate (21), two groups of connecting blocks (25) are welded on one side of the fixed plate (21), and two groups of first guide rods (26) are plugged into one side of the fixed plate (21), one end of the two groups of first guide rods (26) are respectively threadedly connected to the two groups of connecting blocks (25), the other end of the two groups of first guide rods (26) are welded with a limiting block (27), and one end side wall of the two groups of first guide rods (26) is provided with an internal thread, and the two groups of connecting blocks (25) are provided with a screw hole for threading the two groups of first guide rods (26) on the side opposite to the push plate (23).

2. The milling machine positioning fixture according to claim 1, characterized in that: The positioning mechanism (2) further comprises a plurality of sets of fixing bolts (28), a plurality of sets of through holes (29) are provided on one side of the fixing plate (21), the plurality of sets of fixing bolts (28) respectively pass through the plurality of through holes (29) and are fixedly connected to the workbench (1), and a first pad (24) is bonded to the side of the push plate (23) opposite to the two sets of connecting blocks (25).

3. The milling machine positioning fixture according to claim 1, characterized in that: A second pad (31) is bonded to one side of the limit plate (3), and a mounting groove for mounting a pressure sensor (4) is provided on one side of the second pad (31). A controller (10) is mounted on the lower surface of the workbench (1), and the controller (10) is electrically connected to the pressure sensor (4).

4. The milling machine positioning fixture according to claim 3, characterized in that: The upper surface of the workbench (1) is symmetrically provided with two groups of first guide grooves (5) and four groups of second guide grooves (6), and the four groups of second guide grooves (6) are symmetrically arranged on both sides of the two groups of first guide grooves (5). The two groups of first guide grooves (5) and the four groups of second guide grooves (6) are arranged in a rectangular array.

5. The milling machine positioning fixture according to claim 4, characterized in that: A second guide rod (7) is installed in each of the four groups of second guide grooves (6), and the second guide rod (7) is slidably connected to a slider (13). Two groups of threaded rods (81) are respectively installed in the two groups of first guide grooves (5), and the two groups of threaded rods (81) are threadedly connected to a threaded block (12).

6. The milling machine positioning fixture according to claim 5, characterized in that: Two groups of clamping plates (9) are symmetrically arranged on the upper surface of the workbench (1), and the lower surfaces of the two groups of clamping plates (9) are respectively welded to the threaded blocks (12) and the two groups of sliders (13), and the threaded blocks (12) are arranged between the two groups of sliders (13).

7. The milling machine positioning fixture according to claim 6, characterized in that: A third pad (11) is bonded to opposite sides of the two groups of clamping plates (9), and the two groups of clamping plates (9) are respectively arranged vertically and offset with the limit plate (3) and the push plate (23), and the controller (10) is respectively electrically connected to the two groups of servo motors (8).

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