Workpiece positioning mechanism of medium-speed wire cutting machine tool

Abstract

The utility model discloses a workpiece positioning mechanism of a medium-speed wire cutting machine tool, which comprises a base, a moving frame is slidably mounted in the base, a first connecting block is connected onto one side of the moving frame, a first push plate is connected onto the first connecting block and positioned on the base, and a tooth groove is formed in the inner wall of one side of the moving frame. A workpiece is placed on the base to push the first push plate to move, so that a tooth groove in the moving frame drives a gear to rotate, a first rack and a second rack are driven to move mutually, and then a second push plate and a third push plate move mutually to clamp the two sides of the workpiece; compared with the prior art, the positioning mechanism has the advantages that the stability of the workpiece in the vertical direction is guaranteed, meanwhile, through linkage between the transverse direction and the longitudinal direction in the horizontal direction, limiting is provided for the longitudinal direction of the workpiece, and the problem that the longitudinal movement stability of the workpiece is poor during linear cutting is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of wire cutting, in particular to a workpiece positioning mechanism of a medium-speed wire cutting machine tool. Background Art

[0002] Medium-wire EDM belongs to the category of reciprocating high-speed EDM. It realizes multiple cutting functions on high-speed reciprocating EDM and is commonly known as "medium-wire EDM".

[0003] The utility model with authorization announcement number CN217647654U relates to the field of medium-speed wire cutting, and specifically relates to a positioning device for medium-speed wire cutting. Its technical solution is: it includes an electric spark wire cutting machine, a molybdenum wire and a workpiece, the front end of the electric spark wire cutting machine is fixedly connected to a workbench, the top of the workbench is fixedly connected to a plasma water tank, and also includes a positioning mechanism for positioning the workpiece, the workpiece is connected to the left side of the molybdenum wire through the positioning mechanism, and the workpiece is connected to the inside of the plasma water tank through the positioning mechanism, the positioning mechanism includes a mounting plate, a first positioning component and a second positioning component, the left end of the mounting plate is fixedly connected to the left side of the inner wall of the plasma water tank, the beneficial effects of the utility model are: preventing the workpiece from shifting during the online cutting process, which is beneficial to the cutting quality of the workpiece, and can also automatically move the workpiece in a directional manner, and does not require manual operation by technical personnel in the field, and can be easily operated even in a plasma water tank, with better use effect and suitable for promotion.

[0004] During wire cutting production, the worktable needs to drive the workpiece to move horizontally and vertically. However, the existing positioning mechanism does not limit the workpiece laterally when in use, which makes the workpiece easily deviate when following the longitudinal movement of the worktable. Therefore, a workpiece positioning mechanism for a medium-speed wire cutting machine is needed to meet people's needs. Utility Model Content

[0005] The purpose of the utility model is to provide a workpiece positioning mechanism for a medium-speed wire cutting machine tool, so as to solve the problem that the existing positioning mechanism proposed in the above background technology does not limit the lateral direction of the workpiece when in use, so that the workpiece is prone to deviation when following the longitudinal movement of the worktable.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a workpiece positioning mechanism of a medium-speed wire cutting machine tool, comprising a base, a moving frame is slidably installed in the base, a first connecting block is connected to one side of the moving frame, a first push plate is connected to the first connecting block, the first push plate is located on the base, a tooth groove is opened on an inner wall of one side of the moving frame, a gear is rotatably installed in the base, the gear and the tooth groove are meshed with each other, a first rack and a second rack are slidably installed in the base, the first rack and the second rack are parallel to each other and in opposite directions, and are staggered and vertically distributed with the moving frame, the first rack and the second rack are meshed with the gear, and the A first connecting plate is provided on one end of the first rack, a second connecting block is connected to the first connecting plate, a second push plate is connected to the second connecting block, a second connecting plate is provided on one end of the second rack, a third connecting block is connected to the second connecting plate, a third push plate is connected to the third connecting block, the third push plate and the second push plate are both located on the base and are parallel to each other and are vertically distributed with the first push plate, a column is provided on each corner of the base, a same top plate is provided on the top of several columns, a screw is connected to the internal thread of the top plate, a handwheel is provided on the end of the screw located above the top plate, and a pressure plate is rotatably installed on the end of the screw located below the top plate.

[0007] Preferably, a first guide groove is provided in the base, the movable frame is slidably fitted in the first guide groove, a first slide groove is provided on the base, the first slide groove is communicated with the first guide groove, and the first connecting block is slidably fitted in the first slide groove.

[0008] Preferably, a second guide groove is provided in the base, the second guide groove and the first guide groove are offset from each other and perpendicular to each other, the first rack and the second rack are slidably installed on the inner walls on both sides of the second guide groove on the sides away from each other, and a second slide groove and a third slide groove are provided on the base, the second slide groove and the third slide groove are symmetrical to each other and are both connected to the second guide groove, the second connecting block is slidably installed in the second slide groove, and the third connecting block is slidably installed in the third slide groove.

[0009] Preferably, the lengths of the first connecting plate and the second connecting plate are both smaller than the distance between the first rack and the second rack.

[0010] Preferably, springs are provided on inner walls at both ends of the second guide groove, and the two springs are respectively installed on ends of the first connecting plate and the second connecting plate that are away from each other.

[0011] Preferably, a threaded hole is provided in the top plate, and the screw is threadedly connected in the threaded hole.

[0012] Preferably, an inverted T-shaped shaft is rotatably installed in the top end of the pressure plate, and the inverted T-shaped shaft is installed on the bottom end of the screw.

[0013] The beneficial effects of the utility model are:

[0014] The utility model places the workpiece on the base and pushes the first push plate to move, so that the tooth groove on the movable frame drives the gear to rotate, thereby driving the first rack and the second rack to move relative to each other, and then the second push plate and the third push plate move relative to each other to clamp the two sides of the workpiece, and the pressure plate is able to fix the workpiece through the rotation of the screw. Compared with the prior art, the positioning mechanism ensures the vertical stability of the workpiece, and at the same time, provides a limit for the longitudinal direction of the workpiece through the linkage between the horizontal direction and the vertical direction, thereby preventing the problem of poor longitudinal movement stability of the workpiece during wire cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a workpiece positioning mechanism of a medium-speed wire cutting machine tool proposed by the utility model;

[0016] Figure 2 It is a schematic diagram of a top view cross-sectional structure of a moving frame of a workpiece positioning mechanism of a medium-speed wire cutting machine tool proposed by the utility model;

[0017] Figure 3 It is a front cross-sectional structural schematic diagram of a workpiece positioning mechanism of a medium-speed wire cutting machine tool proposed by the utility model;

[0018] Figure 4 It is a schematic diagram of a top-view cross-sectional structure of a first rack of a workpiece positioning mechanism of a medium-speed wire cutting machine tool proposed by the utility model;

[0019] Figure 5 The utility model is a schematic diagram of a side cross-sectional structure of a workpiece positioning mechanism of a medium-speed wire cutting machine tool.

[0020] In the figure: 1, base; 2, moving frame; 3, first connecting block; 4, first push plate; 5, tooth groove; 6, gear; 7, first rack; 8, second rack; 9, first connecting plate; 10, second connecting block; 11, second push plate; 12, second connecting plate; 13, third connecting block; 14, third push plate; 15, column; 16, top plate; 17, screw; 18, hand wheel; 19, pressure plate; 20, first guide groove; 21, first slide groove; 22, second guide groove; 23, second slide groove; 24, third slide groove; 25, spring; 26, threaded hole; 27, reverse T-axis. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Reference Figure 1-5 A workpiece positioning mechanism of a medium-speed wire cutting machine tool comprises a base 1, a moving frame 2 is slidably installed in the base 1, a first connecting block 3 is connected to one side of the moving frame 2, a first push plate 4 is connected to the first connecting block 3, the first push plate 4 is located on the base 1, a tooth groove 5 is provided on one side inner wall of the moving frame 2, a gear 6 is rotatably installed in the base 1, the gear 6 and the tooth groove 5 are meshed with each other, a first rack 7 and a second rack 8 are slidably installed in the base 1, the first rack 7 and the second rack 8 are parallel to each other and in opposite directions, and are both staggered and vertically distributed with the moving frame 2, the first rack 7 and the second rack 8 are both meshed with the gear 6, a first connecting plate 9 is provided on one end of the first rack 7, and the first connecting plate 9 A second connecting block 10 is connected to the top, and a second push plate 11 is connected to the second connecting block 10. A second connecting plate 12 is arranged on one end of the second rack 8, and a third connecting block 13 is connected to the second connecting plate 12, and a third push plate 14 is connected to the third connecting block 13. The third push plate 14 and the second push plate 11 are both located on the base 1 and are parallel to each other and are vertically distributed with the first push plate 4. A column 15 is arranged on each corner of the base 1, and the tops of several columns 15 are provided with the same top plate 16, and the top plate 16 is connected with a screw 17 through an internal thread, and a hand wheel 18 is arranged on the end of the screw 17 located above the top plate 16, and a pressure plate 19 is rotatably installed on the end of the screw 17 located below the top plate 16.

[0023] The positioning mechanism is fixed on the workbench of the wire cutting machine, the workpiece is placed on the base 1, and pushed in the direction of the first push plate 4, so that the workpiece pushes the first push plate 4 to move, and the moving frame 2 follows the movement through the connection of the first connecting block 3. At this time, the tooth groove 5 is engaged with the gear 6 to drive the gear 6 to rotate. At the same time, the rotating gear 6 simultaneously drives the first rack 7 and the second rack 8 to move relative to each other, and the connection between the first connecting plate 9 and the second connecting block 10, and the connection between the second connecting plate 12 and the third connecting block 13, so that the second push plate 11 and the third push plate 14 are close to each other to clamp the two sides of the workpiece. At this time, the screw 17 is rotated by the hand wheel 18, so that the screw 17 drives the pressing plate 19 to press down, and the workpiece is pressed on the base 1. At this time, the workpiece is fixed, and the rotation of the gear 6 simultaneously drives the moving frame 2, the first rack 7 and the second rack 8 to move, thereby realizing the linkage between the lateral positioning and the longitudinal positioning of the workpiece, thereby effectively ensuring the longitudinal and lateral stability of the workpiece in the horizontal direction, and preventing the movement of the workpiece during wire cutting.

[0024] Specifically, in this embodiment, a first guide groove 20 is opened in the base 1, and the movable frame 2 is slidably adapted in the first guide groove 20. A first slide groove 21 is opened on the base 1, and the first slide groove 21 is communicated with the first guide groove 20. The first connecting block 3 is slidably adapted in the first slide groove 21. The first guide groove 20 provides a stable sliding space for the movable frame 2, and the first slide groove 21 provides a sliding space for the first connecting block 3, as well as a connecting space between the movable frame 2 and the first push plate 4.

[0025] Specifically, in this embodiment, a second guide groove 22 is provided in the base 1, and the second guide groove 22 is staggered with the first guide groove 20 and is perpendicular to each other. The first rack 7 and the second rack 8 are slidably installed on the inner walls of the second guide groove 22 on both sides, and a second slide groove 23 and a third slide groove 24 are provided on the base 1. The second slide groove 23 and the third slide groove 24 are symmetrical to each other and are both connected to the second guide groove 22. The second connecting block 10 is slidably installed in the second slide groove 23, and the third connecting block 13 is slidably installed in the third slide groove 24. The second guide groove 22 provides moving space and lateral limit for the first rack 7 and the second rack 8, thereby ensuring the meshing between the first rack 7 and the second rack 8 and the gear 6. The second slide groove 23 and the third slide groove 24 respectively provide space for the connection between the first connecting plate 9 and the second push plate 11, and the connection between the second connecting plate 12 and the third push plate 14.

[0026] Specifically, in this embodiment, the lengths of the first connecting plate 9 and the second connecting plate 12 are both smaller than the distance between the first rack 7 and the second rack 8, so that the minimum distance between the first rack 7 and the second rack 8 for mutual movement is greatly increased.

[0027] Specifically, in the present embodiment, springs 25 are provided on the inner walls at both ends of the second guide groove 22. The two springs 25 are respectively installed on the ends of the first connecting plate 9 and the second connecting plate 12 that are away from each other. The springs 25 enable the elastic force of the stretched springs 25 to pull the first connecting plate 9 and the second connecting plate 12 back to their original positions after the workpiece is removed after the wire cutting is completed. This allows the second push plate 11 and the third push plate 14 to drive the first push plate to recover together, thereby facilitating the subsequent clamping and positioning of workpieces of different specifications.

[0028] Specifically, in this embodiment, a threaded hole 26 is opened in the top plate 16, and the screw 17 is threadedly connected in the threaded hole 26. The cooperation between the threaded hole 26 and the screw 17 enables the screw 17 to rotate and move at the same time, and ensures the stability of the pressure applied by the pressure plate 19 to the workpiece.

[0029] Specifically, in this embodiment, an inverted T-shaped shaft 27 is rotatably installed in the top end of the pressure plate 19, and the inverted T-shaped shaft 27 is installed on the bottom end of the screw 17. The inverted T-shaped shaft 27 enables the rotation and movement of the screw 17 to achieve the purpose of non-interference with the movement of the pressure plate 19, so that the pressure plate 19 does not rotate with the screw 17, but moves with the screw 17.

[0030] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A workpiece positioning mechanism for a medium-speed wire cutting machine tool, comprising a base (1), characterized in that: A moving frame (2) is slidably installed in the base (1), a first connecting block (3) is connected to one side of the moving frame (2), a first push plate (4) is connected to the first connecting block (3), the first push plate (4) is located on the base (1), a tooth groove (5) is provided on the inner wall of one side of the moving frame (2), a gear (6) is rotatably installed in the base (1), the gear (6) and the tooth groove (5) are meshed with each other, a first rack (7) and a second rack (8) are slidably installed in the base (1), the first rack (7) and the second rack (8) are parallel to each other and in opposite directions, and are both staggered and vertically distributed with the moving frame (2), the first rack (7) and the second rack (8) are both meshed with the gear (6), a first connecting plate (9) is provided on one end of the first rack (7), and the first connecting plate (9) is connected to the second connecting plate (9). The second rack (8) is provided with a second connecting plate (12), the second connecting plate (12) is connected with a third connecting block (13), the third connecting block (13) is connected with a third pushing plate (14), the third pushing plate (14) and the second pushing plate (11) are both located on the base (1) and are parallel to each other and are vertically distributed with the first pushing plate (4), a column (15) is provided on each corner of the base (1), a top plate (16) is provided on the top of a plurality of columns (15), a screw rod (17) is connected with an internal thread of the top plate (16), a hand wheel (18) is provided at one end of the screw rod (17) located above the top plate (16), and a pressing plate (19) is rotatably installed at one end of the screw rod (17) located below the top plate (16).

2. The workpiece positioning mechanism of a medium-speed wire cutting machine tool according to claim 1 is characterized in that: The base (1) is provided with a first guide groove (20), the movable frame (2) is slidably fitted in the first guide groove (20), the base (1) is provided with a first slide groove (21), the first slide groove (21) is communicated with the first guide groove (20), and the first connecting block (3) is slidably fitted in the first slide groove (21).

3. The workpiece positioning mechanism of a medium-speed wire cutting machine tool according to claim 1 is characterized in that: The base (1) is provided with a second guide groove (22), the second guide groove (22) and the first guide groove (20) are offset from each other and are perpendicular to each other, the first rack (7) and the second rack (8) are slidably mounted on the inner walls of the second guide groove (22) on the sides facing away from each other, a second slide groove (23) and a third slide groove (24) are provided on the base (1), the second slide groove (23) and the third slide groove (24) are symmetrical to each other and are both connected to the second guide groove (22), the second connecting block (10) is slidably mounted in the second slide groove (23), and the third connecting block (13) is slidably mounted in the third slide groove (24).

4. The workpiece positioning mechanism of a medium-speed wire cutting machine tool according to claim 1 is characterized in that: The lengths of the first connecting plate (9) and the second connecting plate (12) are both smaller than the distance between the first rack (7) and the second rack (8).

5. The workpiece positioning mechanism of a medium-speed wire cutting machine tool according to claim 3 is characterized in that: Springs (25) are provided on the inner walls at both ends of the second guide groove (22), and the two springs (25) are respectively installed on the ends of the first connecting plate (9) and the second connecting plate (12) that are away from each other.

6. The workpiece positioning mechanism of a medium-speed wire cutting machine tool according to claim 1, characterized in that: A threaded hole (26) is provided in the top plate (16), and the screw rod (17) is threadedly connected in the threaded hole (26).

7. The workpiece positioning mechanism of a medium-speed wire cutting machine tool according to claim 1 is characterized in that: An inverted T-shaped shaft (27) is rotatably mounted in the top end of the pressing plate (19), and the inverted T-shaped shaft (27) is mounted on the bottom end of the screw rod (17).

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