Slow-speed wire feeding quick-change clamping device

Abstract

The utility model belongs to the technical field of tool clamps, and particularly relates to a low-speed wire feeding quick-change clamping device. A low-speed wire feeding quick-change clamping device comprises a profiling block, a plurality of V-shaped profiling grooves are formed in one side of the profiling block in the length direction of the profiling block, and the included angle between the two groove walls of each profiling groove is matched with the corresponding included angle of a workpiece. Each profiling groove is correspondingly provided with a pressing plate, and each pressing plate comprises a crimping plate arranged above the corresponding profiling block and crimping blocks arranged at the two ends of the crimping plate; a locking bolt is vertically arranged in the crimping plate in a penetrating manner and is in threaded connection with the interior of the profiling block; and the two crimping blocks are respectively crimped on the upper end surface of the workpiece in the profiling groove and the upper end surface of the profiling block. According to the utility model, the workpieces can be quickly and accurately clamped in batches, and the production efficiency and the machining precision of the workpieces can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of tooling fixtures, and particularly relates to a wire-cut fast-changing clamping device. Background Technique

[0002] The slow wire cutting process is a type of electrical discharge wire cutting. It uses a continuously moving thin metal wire (electrode wire) as the electrode to perform pulsed spark discharge on the workpiece, generating a temperature above 6000 degrees Celsius to erode the metal, thereby completing the cutting of the workpiece. The wire electrode completes the processing during the movement. Therefore, even if the wire electrode is worn, it can be continuously replenished, so the machining accuracy of parts can be improved. Thus, the slow wire cutting process is mostly used for workpieces with complex shapes and precision and small size.

[0003] When machining a workpiece by the slow wire cutting process, it is necessary to clamp and fix the workpiece through a tooling fixture. The existing clamping device, such as the universal fixture for slow wire cutting with the application number 201611234946.X, includes a bracket. An installation groove is opened on the front side of the bracket. A bearing is fixedly installed on the left side surface of the installation groove. The inner ring of the bearing is fixedly connected to the left end of the first screw rod. A square clamping column is provided at the right end of the first screw rod. The square clamping column at the right end of the first screw rod is clamped with the square groove at the left end of the connecting piece. The square groove at the right end of the connecting piece is clamped with the square clamping column at the left end of the second screw rod. The right end of the second screw rod penetrates through the bracket and extends to the right side of the bracket. The right end of the second screw rod is fixedly connected to the rotating ring. The first screw rod is threadedly connected to the first moving block. The universal fixture for slow wire cutting can clamp different workpieces only by replacing the fixture, increasing the applicable range of the fixture, and at the same time reducing the cost and replacement time; the thread directions of the first screw rod and the second screw rod are opposite, so that the first moving block and the second moving block move towards each other, and the adjustment and clamping are convenient.

[0004] Another example is the small workpiece processing fixture for a slow wire cutting machine tool with the application number 202321205480.6 of the Chinese utility model patent, which includes a workbench, a fixed block, a movable block, a guide block, a fixing bolt and an adjusting bolt. The fixed block is arranged on the workbench through the fixing bolt. The guide block is vertically arranged on the fixed block. The movable block is arranged through the guide block. The fixed block and the movable block are placed parallel to each other and are fixedly bolted through the adjusting bolt. The utility model realizes the rapid clamping of the workpiece by changing the workpiece clamping method, thereby improving the machine setup efficiency to increase the production capacity. The fixed block and the movable block are used to clamp the workpiece, and the guide block and the adjusting bolt are used to adjust the tightness of the workpiece, so that the small workpiece can be finely processed, and the production efficiency is improved.

[0005] See Figure 6As shown in the figure, it is a workpiece 1 to be cut by a slow wire cutting process. The workpiece 1 is a cutting tool, one end of which is two inclined surfaces 11 formed by opening a notch, and the included angle between the two inclined surfaces 11 is an acute angle. The other end of the workpiece 1 is a tool shank 12. In this application, after the workpiece 1 is fixed and clamped, the side surface of the tool shank 12 needs to be processed by slow wire cutting.

[0006] When clamping and fixing the workpiece 1 in the above-mentioned existing fixture, the following technical problems exist: 1. Since the shape of the workpiece 1 is irregular, the existing fixture cannot clamp its side surface. When clamping its upper and lower end faces, the positioning accuracy is poor and it is not easy to process the side surface of the tool shank; 2. The above-mentioned existing fixture can only clamp one workpiece to be processed at a time, and repeated clamping is required, resulting in slow efficiency, high labor intensity and being not conducive to batch production and processing. Figure 6 When clamping and fixing the workpiece 1 in the above-mentioned existing fixture, the following technical problems exist: 1. Since the shape of the workpiece 1 is irregular, the existing fixture cannot clamp its side surface. When clamping its upper and lower end faces, the positioning accuracy is poor and it is not easy to process the side surface of the tool shank; 2. The above-mentioned existing fixture can only clamp one workpiece to be processed at a time, and repeated clamping is required, resulting in slow efficiency, high labor intensity and being not conducive to batch production and processing. Utility Model Content

[0007] To solve the technical problems existing in the prior art, the present application provides a slow wire cutting quick-change clamping device that can batch, quickly and accurately clamp workpieces and improve production efficiency and machining accuracy.

[0008] To achieve the above object, the present utility model provides the following technical solutions:

[0009] A slow wire cutting quick-change clamping device includes a profiling block. On one side of the profiling block, a plurality of V-shaped profiling grooves are opened along its length direction, and the included angle between the two groove walls of the profiling groove matches the corresponding included angle of the workpiece; each profiling groove is correspondingly provided with a pressing plate, and the pressing plate includes a pressing plate arranged above the profiling block and pressing blocks arranged at both ends of the pressing plate; a locking bolt vertically penetrates through the pressing plate and is threadedly connected to the profiling block, and the two pressing blocks respectively press on the upper end surface of the workpiece in the profiling groove and the upper end surface of the profiling block.

[0010] Preferably, the profiling block includes a fixed support plate and a profiling plate detachably arranged on the fixed support plate, and the profiling groove is opened on one side of the profiling plate; the locking bolt vertically penetrates through the pressing plate and is threadedly connected to the profiling plate, and the two pressing blocks respectively press on the upper end surface of the workpiece in the profiling groove and the upper end surface of the profiling plate.

[0011] Preferably, a plurality of counterbores are opened on the profiling plate along its length direction, and fastening bolts vertically penetrate through the counterbores and are threadedly connected to the fixed support plate to fix the profiling plate on the fixed support plate.

[0012] Preferably, an avoidance groove is opened at the connection of the two groove walls of the profiling groove.

[0013] Preferably, the crimping block includes a fixed block for crimping the workpiece and an adjustment block for crimping the upper end surface of the profiling plate. The fixed block is integrally formed with the crimping plate, and the adjustment block is detachably arranged at the lower end of the crimping plate.

[0014] Preferably, positioning grooves are formed in the profiling plate corresponding to the adjustment blocks, and the adjustment blocks can be clamped in the positioning grooves.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] By providing a plurality of profiling grooves on the profiling block, when the workpiece is placed in the corresponding profiling groove, the workpiece can be quickly positioned. By tightening the locking bolts, the crimping blocks at both ends of the crimping plate respectively press the upper end surface of the workpiece and the upper end surface of the profiling block, so that the workpiece can be quickly fixed, thus quickly completing the clamping of the workpiece; by providing multiple groups of profiling grooves, pressing plates and locking bolts, multiple workpieces can be clamped simultaneously, reducing the feeding times, and the machine tool can use the same coordinate system to process multiple workpieces, thereby realizing the batch production of workpieces and effectively improving the production efficiency. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall structure after clamping the workpiece in the embodiment of the present utility model.

[0018] Figure 2 It is a schematic diagram of the overall structure of the embodiment of the present utility model.

[0019] Figure 3 It is an exploded structure schematic diagram of the embodiment of the present utility model.

[0020] Figure 4 It is a schematic diagram of the structure of the profiling plate in the embodiment of the present utility model.

[0021] Figure 5 It is a schematic diagram of the structure of the pressing plate in the embodiment of the present utility model.

[0022] Figure 6 It is a schematic diagram of the structure of the workpiece clamped in the embodiment of the present utility model.

[0023] In the figure: 1. Workpiece, 11. Inclined surface, 12. Tool shank

[0024] 2. Profiling block, 21. Profiling groove, 211. Avoidance groove, 22. Fixed support plate, 221. Fixed support plate threaded hole, 23. Profiling plate, 231. Counterbore, 232. Profiling plate threaded hole, 233. Positioning groove

[0025] 3. Pressing plate, 31. Crimping plate, 311. Crimping plate through hole, 32. Fixed block, 33. Adjustment block

[0026] 4. Locking bolt. Detailed implementation mode

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. Embodiment

[0029] See attached Figure 1 、 2 As shown in Figures 3, 4, and 5, a slow wire cutting quick change clamping device includes a profiling block 2. A plurality of V-shaped profiling grooves 21 are provided on one side of the profiling block 2 along its length direction. Specifically, in this embodiment, 15 profiling grooves 21 are provided. The included angle between the two groove walls of the profiling groove 21 matches the corresponding angle of the workpiece 1, that is, the included angle between the two groove walls of the profiling groove 21 is the same as the included angle between the two inclined surfaces 11 of the workpiece 1. Thus, when the workpiece 1 is inserted into the profiling groove 21, the two inclined surfaces 11 of the workpiece 1 are respectively in contact with the two groove walls of the profiling groove 21, thereby realizing the quick positioning of the workpiece 1.

[0030] In other embodiments, the profiling block 2 can be an integral cuboid structure, and the profiling groove 21 is provided on one side of the upper end surface of the profiling block 2 and does not penetrate the profiling block 2. However, for the convenience of machining the profiling block 2 and the profiling groove 21, in this embodiment, the profiling block 2 includes a fixed support plate 22 with a flat plate structure and a profiling plate 23 detachably arranged on the fixed support plate 22. The profiling groove 21 is provided on one side of the profiling plate 23 and penetrates the profiling plate 23.

[0031] See Figure 4As shown, further, a plurality of counterbores 231 are formed in the profiling plate 23 along its length direction. For example, in this embodiment, six counterbores 231 are formed. A fastening bolt (not shown in the figure) vertically penetrates through the counterbore 231 and is threadedly connected to a corresponding fixing plate threaded hole 221 formed in the fixing plate 22 to fix the profiling plate 23 on the fixing plate 22. By designing the profiling block 2 as a split structure, a profiling plate 23 with profiling grooves 21 of corresponding sizes can be selected according to the sizes of different workpieces 1, and the profiling plate 23 can be fixedly installed on the fixing plate 22, thereby saving the materials of this clamping device and reducing the overall cost.

[0032] Further, in order to avoid interference between the tip of the workpiece 1 formed by the two inclined surfaces 11 of the workpiece 1 and the groove wall of the profiling groove 21, which affects the positioning of the workpiece 1, in this embodiment, a relief groove 211 is formed at the connection of the two groove walls of the profiling groove 21. The relief groove 211 is an arc-shaped structure and communicates with the profiling groove 21. When the workpiece 1 is placed in the profiling groove 21, the above-mentioned tip of the workpiece 1 can be inserted into the relief groove 211.

[0033] In order to fix the workpiece 1 placed in the profiling groove 21, a pressing plate 3 is provided corresponding to each profiling groove 21. The pressing plate 3 includes a pressing plate 31 horizontally arranged above the profiling block 2 and pressing blocks arranged at both ends of the pressing plate 31. A locking bolt 4 can rotatably penetrate through the pressing plate 31 vertically and is threadedly connected to a profiling plate threaded hole 232 formed on the upper end surface of the profiling plate 23. When the locking bolt 4 is tightened, the two pressing blocks respectively press against the upper end surface of the workpiece 1 in the profiling groove 21 and the upper end surface of the profiling plate 23.

[0034] Specifically, in other embodiments, the two pressing blocks can be integrally formed with the pressing plate 31 and are both arranged at both ends of the pressing plate 31. The specific heights of the two are such that when the locking bolt 4 is tightened, their lower end surfaces respectively press against the upper end surface of the workpiece 1 and the upper end surface of the profiling plate 23.

[0035] Further, in this embodiment, the pressing block includes a fixed block 32 that can press against the workpiece 1 and an adjustment block 33 that can press against the upper end surface of the profiling plate 23. The fixed block 32 is integrally formed with the pressing plate 31, and the adjustment block 33 is detachably arranged at the lower end of the pressing plate 31. The adjustment block 33 and the pressing plate 31 can be of a split structure, but in order to facilitate the fixing of the adjustment block 33, the adjustment block 33 can be connected by clamping, by bolts, and other detachable connection methods. Due to the detachable design of the adjustment block 33, when workpieces 1 of different sizes and different thicknesses are placed in the profiling groove 21, the adjustment block 33 with a corresponding height can be replaced, thereby realizing the stable clamping of the workpiece 1.

[0036] Further, in order to avoid excessive shaking of the crimping plate 31 when tightening the locking bolt 4, positioning grooves 233 are provided on the profiling plate 23 corresponding to the respective adjusting blocks 33. The adjusting blocks 33 can be clamped in the positioning grooves 233, thereby avoiding excessive shaking of the adjusting blocks 33 and the crimping plate 31.

[0037] The working process of the embodiment of the present utility model is as follows:

[0038] First, the profiling plate 23 is fixedly installed on the fixed support plate 22 through fastening bolts;

[0039] Place the pressing plate 3 with the fixed block 32 and the adjusting block 33 above the profiling groove 21. The locking bolt 4 passes through the through hole 311 of the crimping plate 31 on the crimping plate 31 and is threadedly connected to the threaded hole 232 of the profiling plate. At this time, the adjusting block 33 is clamped in the positioning groove 233 and the locking bolt 4 does not lock the pressing plate 3; install each pressing plate 3 and the locking bolt 4 according to the description of this step;

[0040] Clamp the workpiece 1 in the profiling groove 21 and make the two inclined surfaces 11 respectively abut against the two groove walls of the profiling groove 21. Then, tighten the locking bolt 4 to achieve the clamping and fixing of the workpiece 1; install the workpiece 1 in each profiling groove 21 according to the description of this step;

[0041] Fix the slow wire fast-changing clamping device for clamping the workpiece 1 on the slow wire machine tool for batch processing. After the processing is completed, remove the slow wire fast-changing clamping device, loosen each locking bolt 4 and remove the processed workpiece 1.

[0042] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A slow wire cutting fast-changing clamping device, characterized in that: It includes a profiling block, on one side of which there are a plurality of V-shaped profiling grooves opened along its length direction, and the included angle between the two groove walls of the profiling groove matches the corresponding angle of the workpiece; Each of the profiling grooves is correspondingly provided with a pressing plate, and the pressing plate includes a pressing plate arranged above the profiling block and pressing blocks arranged at both ends of the pressing plate; The locking bolt vertically penetrates through the pressing plate and is threadedly connected to the profiling block, and the two pressing blocks respectively press against the upper end surface of the workpiece in the profiling groove and the upper end surface of the profiling block.

2. The slow wire cutting fast-changing clamping device according to claim 1, characterized in that: The profiling block includes a fixed support plate and a profiling plate detachably arranged on the fixed support plate, and the profiling groove is opened on one side of the profiling plate; the locking bolt vertically penetrates through the pressing plate and is threadedly connected to the profiling plate, and the two pressing blocks respectively press against the upper end surface of the workpiece in the profiling groove and the upper end surface of the profiling plate.

3. The slow wire cutting fast-changing clamping device according to claim 2, characterized in that: A plurality of counterbores are opened on the profiling plate along its length direction, and the fastening bolts vertically penetrate through the counterbores and are threadedly connected to the fixed support plate to fix the profiling plate on the fixed support plate.

4. The fast-changing clamping device for slow wire cutting according to claim 1, characterized in that: An avoidance groove is opened at the connection of the two groove walls of the profiling groove.

5. The slow wire cutting fast-changing clamping device according to claim 2, characterized in that: The pressing block includes a fixed block that can press against the workpiece and an adjustment block that can press against the upper end surface of the profiling plate. The fixed block is integrally formed with the pressing plate, and the adjustment block is detachably arranged at the lower end of the pressing plate.

6. The slow wire cutting fast-changing clamping device according to claim 5, characterized in that: Positioning grooves are opened on the profiling plate corresponding to each of the adjustment blocks, and the adjustment blocks can be clamped in the positioning grooves.

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