Miniature workpiece clamp

Abstract

The utility model relates to the technical field of clamps, in particular to a miniature workpiece clamp which comprises a clamping head and a jacking part. The clamping head is provided with a clamping hole matched with the workpiece so that the workpiece can be placed in the clamping hole. And the jacking part is telescopically arranged on the clamping head and can extend into the clamping hole. When the miniature workpiece clamp is used, the jacking part retreats firstly, so that the clamping hole is vacated. And then the tiny workpiece is placed in the clamping hole and is clamped in the clamping hole through the jacking part. And finally, the clamping part is fixed to a machine tool, and linear cutting machining can be conducted. After machining is completed, the workpiece can be taken out and replaced with a new workpiece by loosening the jacking part. In this way, clamping of the miniature workpiece is more convenient, and machining of the miniature workpiece is facilitated. Due to the fact that linear cutting machining is non-contact machining, the workpiece is not subjected to obvious external force in the machining process. Therefore, the workpiece can be slightly clamped, and strong clamping is not needed.

Description

Technical Field

[0001] This utility model relates to the technical field of fixtures, and more specifically, to a micro workpiece fixture. Background Technology

[0002] Wire EDM, also known as electrical discharge wire cutting, is a precision machining method widely used in the field of metal processing. It utilizes the principle of electrical discharge to generate a high-frequency electric arc between the workpiece and a metal wire, thereby achieving cutting and drilling of metal materials.

[0003] In wire EDM, tiny rods are frequently machined. Due to their small size, conventional fixtures cannot be used for clamping. Therefore, machining tiny rods is quite challenging. Utility Model Content

[0004] The purpose of this utility model is to provide a micro workpiece clamp that can conveniently clamp micro workpieces, thereby facilitating the processing and clamping of micro workpieces.

[0005] The embodiments of this utility model are achieved through the following technical solutions:

[0006] A miniature workpiece fixture includes a clamping head and a clamping part; the clamping head is provided with a clamping hole to cooperate with the workpiece so that the workpiece can be placed into the clamping hole; the clamping part is telescopically disposed on the clamping head and can extend into the clamping hole.

[0007] Furthermore, it also includes a mounting base; the surface of the mounting base is provided with a sliding groove connecting its opposite sides; the clamping head is provided with a slider in cooperation with the sliding groove, so that the slider can be embedded in the sliding groove and slide along the sliding groove; the mounting base is provided with a mounting part in cooperation with the machine tool.

[0008] Furthermore, the bottom of the slider is provided with a telescopic hole; an ejector spring and a limiting block are provided in the telescopic hole, so that the ejector spring can push the limiting block to move along the telescopic hole and protrude out of the opening of the telescopic hole; the bottom of the slide groove is provided with a limiting groove in cooperation with the limiting block, so that when the slider slides into the slide groove, the limiting block is accommodated in the limiting groove.

[0009] Furthermore, two sets of the limiting blocks and ejection springs are provided; the slide groove is provided with a limiting groove for each of the limiting blocks; the difference between the distance between the two limiting grooves and the distance between the two limiting blocks is 0.5mm.

[0010] Furthermore, the limiting block is a steel ball.

[0011] Furthermore, the bottom of the mounting base is provided with a through hole that mates with the limiting groove, so that the through hole connects to the bottom of the limiting groove.

[0012] Furthermore, the clamping head is provided with a clamping slot communicating with the clamping hole; the tightening part is a screw; the screw is threadedly connected to the clamping head and passes through the clamping slot.

[0013] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects:

[0014] In use, the miniature workpiece fixture of this invention first retracts the clamping part, opening the clamping hole. Then, the miniature workpiece is placed into the clamping hole and clamped thereby by the clamping part. Finally, the clamping part is fixed to the machine tool for wire EDM machining. After machining, the clamping part is released to remove the workpiece and replace it with a new one. This makes clamping miniature workpieces more convenient and facilitates their machining.

[0015] The mounting base is fixedly installed on the machine tool. The chuck and the mounting base are connected by a sliding groove, allowing the chuck to be replaced as needed, thus avoiding the hassle of frequently installing and fixing the mounting base. When the chuck is pushed into the sliding groove of the mounting base, the ejector spring pushes the limit block into the limit groove, thereby fixing the position of the chuck relative to the mounting base. This facilitates the positioning of the chuck and makes the positioning and installation of the chuck and the mounting base convenient. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a miniature workpiece fixture with a circular clamping hole.

[0017] Figure 2 This is a schematic diagram of a miniature workpiece fixture with a square clamping hole.

[0018] Figure 3 A schematic diagram of a miniature workpiece fixture with a clamping gap.

[0019] Figure 4 A schematic diagram of the internal structure of a miniature workpiece fixture with a clamping gap.

[0020] Reference numerals: 1-clamping head, 2-tightening part, 3-clamping hole, 4-mounting base, 5-slider, 6-ejection spring, 7-limiting block, 8-through hole, 9-clamping slot. Detailed Implementation

[0021] like Figures 1-4As shown, this utility model provides a miniature workpiece fixture, including a clamping head 1 and a clamping part 2. The clamping head 1 is provided with a clamping hole 3 to accommodate the workpiece, allowing the workpiece to be inserted into the clamping hole 3. The diameter of the clamping hole 3 is slightly larger than the outer diameter of the workpiece, allowing the workpiece to be easily inserted into the clamping hole 3. The workpiece here generally refers to a rod-shaped workpiece, such as a round rod, a rectangular rod, or a rod-shaped workpiece with other cross-sectional shapes. Correspondingly, the clamping hole 3 is also set as a round hole, a rectangular hole, or a hole of other shapes. The workpiece can also have a rod-shaped clamping part, as long as it can be easily inserted into the clamping hole 3. The clamping part 2 is telescopically provided in the clamping head 1 and can extend into the clamping hole 3. The clamping part 2 can be a screw. That is, the screw can be inserted into the clamping hole 3 to lock the workpiece inside the clamping hole 3. Loosening the screw can release the workpiece, allowing the workpiece to be removed from the clamping hole 3.

[0022] In use, the miniature workpiece fixture of this invention first retracts the clamping part 2, leaving the clamping hole 3 open. Then, the miniature workpiece is placed inside the clamping hole 3 and clamped thereby by the clamping part 2. Finally, the clamping part is fixed to the machine tool for wire EDM processing. After processing, the clamping part 2 is released to remove the workpiece and replace it with a new one. This makes clamping miniature workpieces more convenient and easier to process. Since wire EDM is a non-contact process, the workpiece is not subjected to significant external force during processing. Therefore, only slight clamping is required; strong clamping is unnecessary.

[0023] In this embodiment, a mounting base 4 is also included. The surface of the mounting base 4 is provided with a sliding groove connecting its opposite sides. A sliding block 5 is provided with the clamping head 1 to cooperate with the sliding groove, allowing the sliding block 5 to be inserted into the sliding groove from either side of the mounting base 4 and slide along the groove. The mounting base 4 is provided with a mounting part that cooperates with the machine tool. The mounting part can have several fixing holes, through which bolts are inserted to fix the mounting base 4 to the machine tool.

[0024] In use, simply fix the mounting base 4 to the machine tool. When it is necessary to change the type of workpiece, simply attach the matching chuck 1 to the mounting base 4. The mounting base 4 is fixedly installed on the machine tool, and the chuck 1 and the mounting base 4 are connected by a sliding groove, which allows the chuck 1 to be replaced as needed, thus avoiding the trouble caused by frequently installing and fixing the mounting base 4.

[0025] In this embodiment, a telescopic hole is provided at the bottom of the slider 5. An ejector spring 6 and a limiting block 7 are disposed within the telescopic hole. The ejector spring 6 is located internally, allowing it to push the limiting block 7 to move along the telescopic hole and protrude from the opening of the telescopic hole. Figure 4As shown, a limiting groove is provided at the bottom of the slide groove in conjunction with the limiting block 7, so that the limiting block 7 is accommodated inside the limiting groove when the slider 5 slides into the slide groove. That is, during the process of placing the slider 5 into the slide groove and pushing it in, when the limiting block 7 reaches the limiting groove, the ejector spring 6 pushes the limiting block 7 into the limiting groove, thereby fixing the position of the clamping head 1 relative to the mounting base 4. This position is set as the clamping position of the clamping head 1 relative to the mounting base 4.

[0026] During the process of pushing the clamping head 1 into the slide groove, the cooperation between the limiting block 7 and the limiting groove serves as the clamping positioning signal, making the adjustment of their relative positions more convenient and quick. It also positions the clamping head 1, preventing it from shifting during use.

[0027] In this embodiment, two sets of limiting blocks 7 and ejector springs 6 are provided. Each limiting block 7 has a limiting groove that mates with the sliding groove. The difference between the distance between the two limiting grooves and the distance between the two limiting blocks 7 is 0.5 mm.

[0028] If the distance between the two limiting grooves is the same as the distance between the two limiting blocks 7, the actual machining error may prevent the limiting blocks 7 from fitting perfectly into the limiting grooves, thus preventing any wobble between them. Therefore, setting a difference of 0.5mm ensures that the limiting blocks 7 and the limiting grooves will be tightly joined due to the pushing of the ejector spring 6, thereby preventing them from wobbling and causing the clamping head 1 to wobble when installed on the mounting base 4, thus ensuring clamping accuracy.

[0029] In this embodiment, the limiting block 7 is a steel ball. This allows the steel ball to roll as the slider 5 slides along the groove, thus preventing sliding friction between the limiting block 7 and the bottom of the groove, extending its service life. Simultaneously, the portion of the steel ball protruding from the telescopic hole has curved edges, allowing the steel ball to exit the limiting groove simply by pushing the slider 5. This facilitates the removal of the clamping head 1 from the mounting base 4.

[0030] In this embodiment, the bottom of the mounting base 4 is provided with a through hole 8 to mate with the limiting groove, so that the through hole 8 connects to the bottom of the limiting groove. In practice, the through hole 8 replaces the limiting groove. When the limiting block 7 enters the limiting groove, the limiting block 7 enters the through hole 8. If it is difficult for the sliding slider 5 to make the ball retract from the through hole 8 after the limiting block 7 enters the through hole 8, a rod-shaped tool can be used to push the limiting block 7 out of the through hole 8, thereby allowing the clamping head 1 to retract from the mounting base 4.

[0031] In this embodiment, the clamping head 1 is provided with a clamping slot 9 communicating with the clamping hole 3. The tightening part 2 is a screw. Figure 3 and 3As shown, the screw is threaded onto the clamping head 1 and traverses the clamping slot 9. The clamping slot 9 is another implementation method. In this method, tightening the screw gradually reduces the clamping slot 9, causing the portions on both sides of the clamping hole 3 to gradually close together, thereby clamping the workpiece. During clamping in this way, the clamping part 2 does not directly contact the workpiece, nor does it rotate relative to the workpiece and cause damage.

Claims

1. A miniature workpiece fixture, characterized in that: It includes a clamping head and a clamping part; the clamping head is provided with a clamping hole to cooperate with the workpiece so that the workpiece can be placed into the clamping hole; the clamping part is telescopically provided in the clamping head and can extend into the clamping hole. It also includes a mounting base; the surface of the mounting base is provided with a sliding groove connecting its opposite sides; the clamping head is provided with a slider in cooperation with the sliding groove, so that the slider can be embedded in the sliding groove and slide along the sliding groove; the mounting base is provided with a mounting part in cooperation with the machine tool; The bottom of the slider is provided with a telescopic hole; a push-out spring and a limiting block are provided in the telescopic hole, so that the push-out spring can push the limiting block to move along the telescopic hole and protrude out of the opening of the telescopic hole; the bottom of the slide groove is provided with a limiting groove in cooperation with the limiting block, so that when the slider slides into the slide groove, the limiting block is accommodated in the limiting groove.

2. The miniature workpiece fixture according to claim 1, characterized in that: Two sets of limiting blocks and ejection springs are provided; each limiting block is provided with a limiting groove in conjunction with the sliding groove; the difference between the distance between the two limiting grooves and the distance between the two limiting blocks is 0.5mm.

3. The miniature workpiece fixture according to claim 2, characterized in that: The limiting block is a steel ball.

4. The miniature workpiece fixture according to claim 3, characterized in that: The bottom of the mounting base is provided with a through hole that mates with the limiting groove, so that the through hole connects to the bottom of the limiting groove.

5. The miniature workpiece fixture according to claim 4, characterized in that: The clamping head is provided with a clamping slot that communicates with the clamping hole; the tightening part is a screw; the screw is threadedly connected to the clamping head and passes through the clamping slot.

Images