Fixing mechanism and cutting clamp

Abstract

The fixing mechanism comprises a first clamping part and a second clamping part which are oppositely arranged, a workpiece and a placing base are placed between the first clamping part and the second clamping part, the first clamping part and the second clamping part are installed on the placing base, the first clamping part is fixedly connected with the placing base, and the second clamping part is fixedly connected with the placing base. The second clamping part is in sliding connection with the placing base, and a driving assembly used for driving the second clamping part to move is arranged on the placing base. The fixing mechanism has the beneficial effects that the first clamping part and the second clamping part extrude a workpiece, fixing and cutting work of the workpiece is completed, and the fixing mechanism can fix plate-shaped and rod-shaped workpieces through the special structures of the first clamping part and the clamping end and the notches formed in the first clamping part and the clamping end, so that the fixing mechanism is simple in structure, convenient to use and high in practicability. And meanwhile, the clamping stability of the irregular workpiece is improved through mutual cooperation of a clamping hole and an abutting rod, and therefore the application range of the fixing mechanism for clamping the workpiece is widened.

Description

Technical Field

[0001] The present invention relates to the field of cutting and clamping, and in particular to a fixing mechanism and a cutting fixture. Background Art

[0002] Wire electrical discharge machining is one of the special machining methods. The basic principle of wire cutting machining is to use a moving thin metal wire as a tool electrode, and pass a pulsed current between the workpiece and the wire. The workpiece is cut by the electric spark. During the machining process, in order to ensure the smooth progress of the machining, the workpiece material to be cut needs to be clamped and fixed by a fixture. At present, most of the fixtures used in wire cutting machines are general fixtures such as pressing plates and vises, and they are all greatly restricted during use. For example, when using a pressing plate, it can mostly only be used to clamp thin plate materials, and often multiple pressing plates are needed to completely clamp the workpiece material. Another example is that a general vise can only be used to clamp regular cylindrical bar materials or materials with relatively regular shapes. For materials with large sizes and irregular shapes, these fixtures will be greatly restricted, and there are problems such as inconvenient clamping and insufficient clamping, which will affect the normal progress of the machining and even lead to the appearance of defective products. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is that the clamping types of the fixtures used in existing wire cutting machines are single and the applicable range is not large.

[0004] To solve the above technical problem, the present invention provides the following technical solution: A fixing mechanism, which includes a first clamping portion and a second clamping portion arranged opposite to each other. A workpiece is placed between the first clamping portion and the second clamping portion. The second clamping portion can move closer to or away from the first clamping portion in the opposite direction. Clamping holes are provided on the first clamping portion and the second clamping portion, and a contact rod for increasing the contact area between the first clamping portion and the second clamping portion and the workpiece is telescopically installed in the clamping holes.

[0005] As a preferred solution of the fixing mechanism of the present invention, wherein: the second clamping portion is composed of a clamping end and a lifting plate, and the clamping end is fixedly connected to the lifting plate. A driving component for driving the movement of the second clamping portion is provided at one end of the lifting plate away from the clamping end. Both the clamping end and the first clamping portion are plate-shaped structures.

[0006] As a preferred solution of the fixing mechanism of the present invention, wherein: both ends of the contact rod penetrate through the clamping holes, and a rotating end is installed at one end of the contact rod away from the first clamping portion. Threads are provided on the outer portion of the contact rod, and screw grooves adapted to the contact rod are provided on the inner wall of the clamping holes.

[0007] As a preferred embodiment of the fixing mechanism of the present invention, the driving assembly includes a driving screw threadedly connected to the lifting plate, and guide rods slidably connected to the lifting plate are respectively arranged on both sides of the driving screw, and a turntable is installed at one end of the driving screw.

[0008] As a preferred embodiment of the fixing mechanism of the present invention, notches are respectively formed on the sides of the clamping ends opposite to the first clamping portions, and the notches are of a "V" - shaped structure.

[0009] As a preferred embodiment of the fixing mechanism of the present invention, a placing base fixedly connected to the guide rod is fixedly installed at one end of the first clamping portion, and the placing base is rotatably connected to the driving screw.

[0010] As a preferred embodiment of the fixing mechanism of the present invention, an installation groove is arranged on the placing base, and the installation groove is strip - shaped.

[0011] The beneficial effects of the fixing mechanism of the present invention are as follows: Through the extrusion of the workpiece by the first clamping portion and the second clamping portion, the fixing and cutting of the workpiece are completed. By using the special structures of the first clamping portion and the clamping ends and the notches arranged thereon, the fixing mechanism can fix plate - shaped and rod - shaped workpieces. At the same time, by using the mutual cooperation of the clamping holes and the abutting rods, the clamping stability of irregular workpieces is improved, thereby increasing the applicable range of the fixing mechanism for clamping workpieces.

[0012] Another object of the present invention is to provide a cutting fixture, aiming to solve the problem that it is inconvenient to confirm the clamping length of the workpiece when using the fixture of the existing wire - cutting machine tool.

[0013] To solve the above - mentioned technical problems, the present invention also provides the following technical solution: A cutting fixture includes a fixing mechanism; and a measuring assembly, including scale lines arranged on the side of the first clamping portion and at the connection position of the placing base and the first clamping portion, and a positioning baffle slidably installed on the placing base.

[0014] As a preferred embodiment of the cutting fixture of the present invention, the positioning baffle is "L" - shaped, and the protruding end of the positioning baffle abuts against the workpiece.

[0015] As a preferred embodiment of the cutting fixture of the present invention, a transmission assembly for controlling the movement of the positioning baffle is arranged on the placing base. The transmission assembly includes a gear shaft rotatably installed on the placing base, and a transmission runner is installed at one end of the gear shaft. A sliding groove is formed on the placing base, and a transmission rack fixedly connected to the positioning baffle is arranged in the sliding groove. The side of the transmission rack away from the positioning baffle penetrates through the sliding groove and meshes with a transmission gear coaxially fixed to the gear shaft.

[0016] The beneficial effects of the cutting fixture of the present invention are as follows: By the mutual cooperation of the positioning baffle and the scale line on the placement base, the cutting range of the workpiece can be determined, thereby avoiding machining errors caused by too long or too short clamping workpiece sizes, and further improving the cutting accuracy of wire cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present invention and do not limit the present invention. Among them:

[0018] Figure 1 Shows a three-dimensional structural schematic diagram of the invention;

[0019] Figure 2 Shows Figure 1 The enlarged structural schematic diagram of area A in;

[0020] Figure 3 Shows a structural schematic diagram of the measuring component in the invention;

[0021] Figure 4 Shows a split structural schematic diagram of the transmission component in the invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below in conjunction with the specific embodiments and the drawings.

[0023] The terms used in the present invention are those general terms that are currently widely used in the art in consideration of the functions of the present invention, but these terms may change according to the intentions of those of ordinary skill in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in this case, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but based on the meanings of the terms and the overall description of the present invention.

[0024] This embodiment provides a fixing mechanism, as Figure 1 shown, the first clamping portion 1 and the second clamping portion 2 are both arranged on the placement base 3, and the first clamping portion 1 is fixedly connected to the placement base 3. The second clamping portion 2 can freely slide in the opposite direction of the first clamping portion 1 through the driving assembly 7. When clamping, the workpiece to be cut can be placed on the first clamping portion 1, and then the driving assembly 7 is used to control the second clamping portion 2 to approach the first clamping portion 1, and the workpiece is fixed by the extrusion of the second clamping portion 2.

[0025] As Figure 1As shown in the figure, the clamping ends 21 on the first clamping part 1 and the second clamping part 2 are both plate-shaped structures. In this way, when clamping a plate-shaped workpiece, the contact area between the first clamping part 1 and the clamping end 21 and the workpiece can be increased, improving the clamping effect on the plate-shaped workpiece. However, when clamping a rod-shaped workpiece, the contact between the first clamping part 1 and the clamping end 21 and the rod-shaped workpiece is usually line contact or point contact, with a small contact area. This will cause the clamping force to be concentrated in a local area, easily resulting in indentation or deformation on the surface of the rod-shaped workpiece. Moreover, due to the small contact area and uneven distribution of the clamping force, the rod-shaped workpiece is prone to loosening or slipping during the processing, affecting the processing accuracy.

[0026] Therefore, as a further improvement, in this embodiment, notch openings 4 are provided on the sides of the clamping ends 21 on the first clamping part 1 and the second clamping part 2 that are opposite to each other. As shown in Figure 1 and Figure 2 When clamping a rod-shaped workpiece, it can be directly placed into the notch opening 4. During clamping, the rod-shaped workpiece is in contact with the inner wall of the notch opening 4, which not only increases the contact area between the rod-shaped workpiece and the first clamping part 1 and the clamping end 21, but also prevents the rod-shaped workpiece from shaking left and right during cutting, thereby improving the clamping stability of the rod-shaped workpiece.

[0027] For workpieces with large sizes and irregular shapes, when the staff clamps them, there are problems such as inconvenient clamping and insufficient clamping force. To solve this problem, in this embodiment, clamping holes 5 and abutting rods 6 are respectively provided on the first clamping part 1 and the clamping end 21. As shown in Figure 1 When clamping an irregular workpiece, the clamping end 21 on the second clamping part 2 can be controlled by the driving component 7 to approach the irregular workpiece first, and then the rotating ends 61 on the abutting rods 6 are rotated in sequence, so that the abutting rods 6 squeeze the irregular workpiece, thereby increasing the contact area between the irregular workpiece and the first clamping part 1 and the clamping end 21, and improving the clamping stability of the irregular workpiece.

[0028] As shown in Figure 1 and Figure 2 The notch openings 4 provided on the first clamping part 1 and the clamping end 21 are "V"-shaped. This setting can improve the clamping stability of the workpiece because the "V"-shaped notch opening 4 has a certain self-centering ability. When clamping a rod-shaped workpiece, the notch opening 4 will automatically adjust to align the center of the rod-shaped workpiece with the axis of symmetry of the notch opening 4, thereby ensuring the clamping stability. At the same time, the "V"-shaped notch opening 4 is also applicable to rod-shaped workpieces with various diameters. Whether it is a thin metal rod or a thicker pipe, it can be effectively clamped, further expanding the applicable range of the fixing mechanism.

[0029] As shown in Figure 1As shown in the figure, a driving screw rod 71 and a guide rod 72 penetrating through the lifting plate 22 are arranged on the placing base 3, and the driving screw rod 71 is in threaded connection with the lifting plate 22. Therefore, when the turntable 73 on the driving screw rod 71 is rotated, the lifting plate 22 can be driven to move up and down. And under the guidance of the guide rod 72, the lifting plate 22 will not deviate, thus realizing the fixation of the workpiece.

[0030] As Figure 1 shown in the figure, an installation groove 31 is arranged on the placing base 3, which is convenient for connecting the device to the wire cutting machine tool. At the same time, because the installation groove 31 is strip-shaped, it is more convenient for the staff to adjust the installation bolts according to the installation position on the wire cutting machine tool.

[0031] Wire cutting can cut and process conductive materials and semiconductor materials with high hardness, high strength, high brittleness, high toughness, etc. that are difficult or impossible to process by traditional methods. Since the electrode wire is extremely thin, it can process micro special-shaped holes, narrow slots and complex-shaped parts. And during the processing, the electrode wire does not directly contact the workpiece, and there is no significant cutting force. Therefore, the cutting accuracy is relatively high in the wire cutting process. Because the cutting area of the workpiece is set before cutting, but many existing wire cutting machine tools use fixtures that are inconvenient to confirm the clamping length of the workpiece, resulting in a blurred cutting area of the workpiece, thus reducing the cutting accuracy. Therefore, this embodiment provides a fixing mechanism. As Figure 3 shown in the figure, scale lines 81 are provided on the side of the first clamping part 1 and at the connection position of the placing base 3 and the first clamping part 1. And a positioning baffle 82 is slidably installed in the connection area of the placing base 3 and the first clamping part 1. As Figure 4 shown in the figure, the positioning baffle 82 is an "L" - shaped structure, and the protruding position of the positioning baffle 82 abuts against the workpiece.

[0032] Therefore, during the cutting process, the length of the workpiece that does not need to be cut can be calculated first by the preset cutting length of the workpiece and the total length of the workpiece. Then, the end of the workpiece that does not need to be cut is slid along the first clamping part 1 and placed on the placing base 3. Then, the staff pushes the positioning baffle 82 by observing the scale line 81 to push out the cutting area of the workpiece from the clamping area, and thus the workpiece can be fixed by the fixing mechanism, so as to avoid machining errors caused by too long or too short clamping dimensions of the workpiece, and further improve the cutting accuracy of wire cutting.

[0033] As Figure 4As shown, the transmission assembly 9 includes a gear shaft 91 and a transmission gear 95. The transmission gear 95 meshes with a transmission rack 94 installed under the positioning baffle 82 through teeth. Therefore, when adjusting the position of the positioning baffle 82, only by rotating the transmission runner 92 installed at one end of the gear shaft 91 can the gear shaft 91 be driven to move. The transmission gear 95 on the gear shaft 91 meshes through teeth, enabling the transmission gear 95 and the positioning baffle 82 to move along the sliding groove 93, thereby realizing the confirmation of the workpiece cutting area.

[0034] The methods and devices described in detail above are only examples, and those skilled in the art can modify these examples in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A fixing mechanism, characterized in that: Comprising, A first clamping part (1) and a second clamping part (2) which are oppositely arranged, with a workpiece placed between the first clamping part (1) and the second clamping part (2), and the second clamping part (2) can approach or move away from the first clamping part (1) in the relative direction; Clamping holes (5) are arranged on the first clamping part (1) and the second clamping part (2), and a contact rod (6) for increasing the contact area between the first clamping part (1) and the second clamping part (2) and the workpiece is telescopically installed in the clamping holes (5).

2. The fixing mechanism according to claim 1, characterized in that: The second clamping part (2) is composed of a clamping end (21) and a lifting plate (22), and the clamping end (21) is fixedly connected to the lifting plate (22). A driving component (7) for driving the movement of the second clamping part (2) is provided at one end of the lifting plate (22) away from the clamping end (21). Both the clamping end (21) and the first clamping part (1) are plate-like structures.

3. The fixing mechanism according to claim 2, characterized in that: Both ends of the contact rod (6) penetrate through the clamping holes (5), and a rotating end (61) is installed at one end of the contact rod (6) away from the first clamping part. The outer part of the contact rod (6) is provided with threads, and a screw groove adapted to the contact rod (6) is opened on the inner wall of the clamping hole (5).

4. The fixing mechanism according to claim 2, characterized in that: The driving component (7) includes a driving screw rod (71) threadedly connected to the lifting plate (22), and guide rods (72) slidably connected to the lifting plate (22) are respectively arranged on both sides of the driving screw rod (71). A turntable (73) is installed at one end of the driving screw rod (71).

5. The fixing mechanism according to claim 2, characterized in that: Notches (4) are respectively opened on one side of the clamping end (21) opposite to the first clamping part (1), and the notches (4) are in a "V" - shaped structure.

6. The fixing mechanism according to claim 4, characterized in that: A placing base (3) fixedly connected to the guide rod (72) is fixedly installed at one end of the first clamping part (1), and the placing base (3) is rotatably connected to the driving screw rod (71).

7. The fixing mechanism according to claim 6, characterized in that: An installation groove (31) is arranged on the placing base (3), and the installation groove (31) is strip - shaped.

8. A cutting fixture, characterized in that: Comprising the fixing mechanism according to any one of claims 1 - 7; and, A measuring component (8), including scale lines (81) arranged on the side of the first clamping part (1) and at the connection position of the placing base (3) and the first clamping part (1), and a positioning baffle (82) slidably installed on the placing base (3).

9. The cutting fixture according to claim 8, wherein: The positioning baffle (82) is in an "L" - shape, and the protruding end of the positioning baffle (82) abuts against the workpiece.

10. The cutting jig according to claim 8, characterized in that: A transmission component (9) for controlling the movement of the positioning baffle (82) is arranged on the placing base (3). The transmission component (9) includes a gear shaft (91) rotatably installed on the placing base (3), and a transmission runner (92) is installed at one end of the gear shaft (91). A sliding groove (93) is opened on the placing base (3), and a transmission rack (94) fixedly connected to the positioning baffle (82) is arranged in the sliding groove (93). The side of the transmission rack (94) away from the positioning baffle (82) penetrates through the sliding groove (93) and meshes with a transmission gear (95) coaxially fixed to the gear shaft (91).

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