A multi-station fixture for wire cutting

Abstract

The utility model relates to a kind of multi-station clamps for wire cutting in tool fixture field, including base and the positioning pressboard detachably installed in the base one side, the side of the base close to the positioning pressboard is equipped with opening slot, the positioning plate matched with the positioning pressboard is slidably installed in the opening slot by counter spring, the both sides of the opening slot are equipped with the limiting stop edge and the positioning pin matched with the positioning plate, the positioning plate is equipped with several limiting grooves for fixing workpiece. The utility model is realized the pre-positioning installation of multiple workpieces by the design of several limiting grooves. And by the synergies of limiting stop edge, positioning pin and counter spring, positioning plate stably slides in opening slot, and always exert pressure to the direction of positioning pressboard, cooperate with the positioning pressboard of the side of base, realize the simultaneous clamping and positioning of multiple workpieces, to improve clamping efficiency and positioning accuracy, ensure the consistency and stability of wire cutting machining.

Description

Technical Field

[0001] This utility model relates to the field of tooling fixtures, specifically to a multi-station fixture for wire EDM. Background Technology

[0002] A fixture is a device used in mechanical manufacturing to fix a workpiece in the correct position for machining or inspection; it is also called a clamp. Broadly speaking, any device used to quickly, conveniently, and safely install a workpiece at any stage of the manufacturing process can be called a fixture. In wire EDM, the workpiece is precisely positioned and fixed in the machining position using a fixture, and then non-contact cutting is achieved through pulsed discharge between the electrode wire and the workpiece, realizing high-precision cutting.

[0003] However, existing wire EDM fixtures typically use a single-clamping installation method. When multiple workpieces need to be processed simultaneously, they must be clamped one by one, resulting in low clamping efficiency, consuming a lot of time, and making it difficult to ensure the relative positional accuracy between workpieces. This affects the consistency and overall accuracy of batch processing, making it difficult to meet the production requirements of high efficiency and high precision. Therefore, this utility model proposes a multi-station fixture for wire EDM that can clamp multiple workpieces at once. Summary of the Invention

[0004] This utility model provides a multi-station fixture for wire EDM. By cooperating with the positioning plate and the upper positioning groove of the positioning plate, it solves the problem that existing wire EDM fixtures require clamping workpieces one by one, which affects clamping efficiency and positioning accuracy.

[0005] The objective of this utility model is achieved through the following means: A multi-station fixture for wire EDM includes a base and a positioning plate detachably mounted on one side of the base. The base has an opening groove on the side near the positioning plate. A positioning plate that cooperates with the positioning plate is slidably mounted in the opening groove by a counter-pressure spring. Limiting flanges and positioning pins that cooperate with the positioning plate are provided on both sides of the opening groove. The positioning plate has a plurality of limiting grooves for fixing the workpiece.

[0006] Furthermore, the positioning plate is detachably mounted to one side of the base via a quick-release assembly.

[0007] Furthermore, the quick-release assembly includes a fixed base and a connecting base. The connecting base has a slidable rotating rod inside. One end of the connecting base has several fixing blocks that slide with the rotating rod. The fixed base has fixing grooves that cooperate with the several fixing blocks.

[0008] Furthermore, the fixing block has a spherical structure.

[0009] Furthermore, the rotating rod includes a rod body and a knob at one end of the rod body, and the other end of the rod body is provided with a stepped shaft that cooperates with the fixing block.

[0010] Furthermore, the rotating rod is slidably installed in the connecting seat by a return spring, a sliding pin is provided on the outside of the rotating rod, and a sliding groove that cooperates with the sliding pin is provided through the outside of the connecting seat. Both ends of the sliding groove are provided with slots that cooperate with the sliding pin.

[0011] Furthermore, the sliding groove is a spiral keyway, and the rotation angle of the spiral keyway is 90 degrees.

[0012] Furthermore, the limiting groove includes a concentric positioning groove and an angular positioning groove.

[0013] Furthermore, the positioning plate is composed of a concentric positioning block and a directional positioning block, with the concentric positioning groove and the angular positioning groove respectively penetrating one end of the concentric positioning block and the directional positioning block.

[0014] Furthermore, the number of the positioning plates is one or more.

[0015] The beneficial effects of this utility model are as follows: The design of several limiting grooves enables the pre-positioning and installation of multiple workpieces. Through the coordinated action of the limiting flanges, positioning pins, and counter-pressure springs, the positioning plate slides stably within the opening grooves, consistently applying pressure towards the positioning plate. This, combined with the positioning plate on one side of the base, allows for the simultaneous clamping and positioning of multiple workpieces, thereby improving clamping efficiency and positioning accuracy, and ensuring the consistency and stability of wire EDM processing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the positioning pressure plate during installation of this utility model; Figure 2 This is a schematic diagram of the structure of the positioning pressure plate of this utility model during disassembly; Figure 3 This is a cross-sectional view of a multi-station fixture for wire EDM according to the present invention; Figure 4 for Figure 3 Enlarged diagram of A in the middle; Figure 5 for Figure 3 Enlarged diagram of B in the middle; Figure 6 This is a partial cross-sectional view of the positioning pressure plate of this utility model during disassembly; Figure 7 This is an exploded view of the quick-release component in this utility model; The reference numerals in the figure are as follows: 1-base, 11-opening slot, 12-reverse pressure spring, 13-limiting stop, 14-positioning pin, 2-positioning pressure plate, 3-positioning plate, 31-limiting slot, 311-concentric positioning slot, 312-angle positioning slot, 32-concentric positioning block, 33-direction positioning block, 4-quick release assembly, 41-fixed seat, 411-fixed slot, 42-connecting seat, 421-sliding slot, 422-slot, 43-reset spring, 44-rotating rod, 441-rod body, 442-knob, 443-step shaft, 444-sliding pin, 45-fixing block. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] In this embodiment, refer to Figure 1 - Figure 7 The present invention relates to a multi-station fixture for wire cutting, comprising a base 1 and a positioning plate 2 detachably mounted on one side of the base 1. The base 1 has an opening groove 11 on the side near the positioning plate 2. A positioning plate 3 that cooperates with the positioning plate 2 is slidably mounted in the opening groove 11 by means of a counter-pressure spring 12. Both sides of the opening groove 11 are provided with limiting stops 13 and positioning pins 14 that cooperate with the positioning plate 3. The positioning plate 3 is provided with a plurality of limiting grooves 31 for fixing the workpiece.

[0019] The limiting stop 13 is used to limit the sliding stroke of the positioning plate 3 within the opening slot 11, so that the positioning plate 3 can only reciprocate within the opening slot 11 without detaching from the base 1. The position of the limiting stop 13 needs to be precisely set according to the actual size of the workpiece and the clamping requirements, so as to avoid the positioning plate 3's stroke being restricted or over-aligned due to improper positioning of the limiting stop 13, which would affect the stability of workpiece clamping and machining accuracy.

[0020] The locating pin 14 is used to ensure the stability and guiding accuracy of the locating plate 3 during the sliding process. This ensures that the locating plate 3 maintains a precise fit with the base 1 throughout the sliding process, thereby avoiding positioning errors caused by misalignment and ensuring the repeatability of workpiece clamping. In this embodiment, the two ends of the locating pin 14 are respectively provided with limiting blocks and bolts that cooperate with the base 1. Through the cooperation of the limiting blocks and bolts, the locating pin 14 is stably installed on the base 1, preventing it from loosening or falling off during use. This ensures that the locating pin 14 remains stable and reliable during long-term use, providing continuous and reliable guiding protection for the precise sliding of the locating plate 3.

[0021] One end of the counter-pressure spring 12 abuts against the inner wall of the opening groove 11, and the other end abuts against one end of the positioning plate 3, thereby providing a continuous elastic preload to the positioning plate 3. This ensures that the positioning plate 3 always moves towards the positioning pressure plate 2 when no external force is applied, so that the workpiece can be stably clamped between the positioning plate 3 and the positioning pressure plate 2 after being inserted into the limiting groove 31. This prevents the workpiece from loosening or shifting due to insufficient pressure during wire cutting, thus ensuring machining accuracy.

[0022] The contact surfaces of the base 1 and the positioning plate 2 are both used as positioning reference surfaces to ensure the flatness and parallelism requirements of the workpiece during clamping. Both positioning reference surfaces are precision ground to ensure that the workpiece is fully in contact with the fixture during clamping, thereby providing a high-precision positioning basis for the workpiece, ensuring the consistency of clamping between workpieces, and effectively reducing positioning deviations caused by uneven contact surfaces.

[0023] In use, the positioning plate 2 is removed from the base 1, and the workpieces to be processed are aligned with the limiting grooves 31 one by one and inserted, so that the section to be processed passes through the limiting grooves 31 to facilitate wire EDM processing. At the same time, the processed part is placed on the side of the positioning plate 2 and fits against the positioning plate 3, thus serving as a positioning reference for cooperating with the positioning plate 2. Subsequently, by reinstalling the positioning plate 2 onto the base 1, multiple workpieces and the positioning plate 3 are pushed to slide synchronously into the opening groove 11, thereby realizing the clamping of multiple workpieces at one time, improving clamping efficiency and ensuring the consistency of the position of each workpiece during the processing.

[0024] During the installation of the positioning plate 2, the counter-pressure spring 12, the positioning pin 14, and the positioning plate 3 work together to ensure that the workpiece is always in close contact with the positioning reference surface of the positioning plate 2, ensuring that the positioning reference between workpieces is consistent. This effectively eliminates the reference deviation caused by clamping each workpiece individually and improves the dimensional consistency of batch processing. The constant preload provided by the counter-pressure spring 12 ensures that the workpiece is always in contact with the reference surface of the positioning plate 2 during processing, avoiding displacement or jumping of the workpiece during wire cutting, which could lead to problems such as machining trajectory deviation or wire breakage.

[0025] The entire clamping process only requires inserting multiple workpieces into the limiting slots 31 and installing the positioning pressure plates 2 to achieve the purpose of clamping multiple workpieces at once. This improves clamping efficiency while ensuring the positional accuracy and clamping stability of each workpiece during processing, significantly reducing human error. This improves the efficiency of batch processing and the consistency of finished products.

[0026] In this embodiment, the positioning plate 2 is detachably mounted on one side of the base 1 via a quick-release assembly 4. The quick-release assembly 4 includes a fixing seat 41 and a connecting seat 42 respectively mounted on one side of the base 1 and the positioning plate 2. The connecting seat 42 is provided with a slidable rotating rod 44. One end of the connecting seat 42 is provided with a plurality of fixing blocks 45 that slidably engage with the rotating rod 44. The connecting seat 42 is provided with a plurality of mounting grooves corresponding to the fixing blocks 45 along the axial direction. The fixing blocks 45 are slidably disposed in the mounting grooves. The fixing seat 41 is provided with fixing grooves 411 that engage with the plurality of fixing blocks 45.

[0027] The outer side of the fixing seat 41 is provided with an external thread that mates with the base 1. The base 1 is provided with an internal thread hole that matches the external thread. The upper end of the fixing seat 41 is provided with an insertion hole. In use, the fixing seat 41 is rotated by a tool that matches the insertion hole, so that its external thread is screwed into the internal thread hole of the base 1, thereby completing the quick connection and locking of the fixing seat 41 and the base 1.

[0028] The connecting seat 42 is fixed to one end of the positioning plate 2 by bolts, thereby achieving a stable connection with the positioning plate 2. By sliding the rotating rod 44, the fixing block 45 engages with the fixing groove 411 to lock the fixing seat 41 and the connecting seat 42, thereby enabling the quick installation and removal of the positioning plate 2.

[0029] In use, by sliding the rotary rod 44, the fixing block 45 is fixed in the mounting groove and fits against the fixing groove 411, achieving a stable connection between the connecting seat 42 and the fixing seat 41, thereby fixing the positioning plate 2 to the base 1. When disassembly is required, simply slide the rotary rod 44 in the opposite direction to loosen the fixing block 45, thereby releasing the locking state between the connecting seat 42 and the fixing seat 41 and completing the quick disassembly of the positioning plate 2.

[0030] In this embodiment, the fixing block 45 has a spherical structure. The fixing groove 411 has a corresponding arc-shaped groove structure. The rotating rod 44 includes a rod body 441 and a knob 442 located at one end of the rod body 441. The other end of the rod body 441 has a stepped shaft 443 that cooperates with the fixing block 45. The cooperation of the spherical structure and the arc-shaped groove allows the fixing block 45 to cooperate with the fixing groove 411 to achieve a locking effect, while also allowing the fixing block 45 to easily disengage from the fixing groove 411 in a loose state, avoiding jamming and other phenomena, thereby ensuring a smooth and efficient disassembly and assembly process.

[0031] The knob 442 is used to manually drive the rotating rod 44 to rotate. One end of the rotating rod 44 has a protrusion that mates with the knob 442, and one end of the knob 442 has a groove that mates with the protrusion. By rotating the knob 442, the rod body 441 can be rotated, thereby causing the rotating rod 44 to rotate and achieving locking or unlocking operations. The stepped shaft 443 is divided into a first stepped shaft and a second stepped shaft. The first stepped shaft and the second stepped shaft are connected by a sloped or arc-shaped structure, so that the fixing block 45 can mate with the first stepped shaft and the second stepped shaft along the sloped or arc-shaped structure, thereby achieving quick locking and releasing of the positioning pressure plate 2.

[0032] The first stepped shaft has a larger diameter section, which matches the inner wall diameter of the connecting seat 42. When the second stepped shaft is aligned with the fixing block 45, the fixing block 45 is pressed into the mounting groove by the first stepped shaft and fits tightly with the fixing groove 411, achieving quick locking between the connecting seat 42 and the fixing seat 41, thereby fixing the positioning plate 2 to the base 1. The second stepped shaft has a smaller diameter section, which is slightly smaller than the diameter of the first stepped shaft. When the second stepped shaft is aligned with the fixing block 45, the fixing block 45 can slide between the mounting groove and the side arm of the second stepped shaft, and under the action of external force, it can easily disengage from the fixing groove 411, allowing the connecting seat 42 to be quickly separated from the fixing seat 41, thereby achieving quick disassembly of the positioning plate 2.

[0033] The rotating rod 44 can be connected to the connecting seat 42 via threads, pin grooves, or other means to achieve both sliding and fixing effects. In this embodiment, a pin groove is used to achieve a sliding connection between the rotating rod 44 and the connecting seat 42. Specifically, the rotating rod 44 is slidably mounted within the connecting seat 42 via a return spring 43. A sliding pin 444 is provided on the outer side of the rotating rod 44, and a sliding groove 421 that engages with the sliding pin 444 is provided through the outer side of the connecting seat 42. Both ends of the sliding groove 421 have retaining grooves 422 that engage with the sliding pin 444. The sliding groove 421 is a helical keyway with a rotation angle of 90 degrees.

[0034] The axial sliding and circumferential limiting of the rotating rod 44 are achieved through the cooperation of the sliding groove 421 and the sliding pin 444. When the sliding pin 444 is embedded in the sliding groove 421 and slides back and forth along the sliding groove 421, it can drive the rotating rod 44 to slide back and forth in the connecting seat 42, thereby causing the first stepped shaft and the second stepped shaft to alternately align with the fixing block 45, realizing the switching between locking and unlocking. Through the cooperation of the slot 422 and the return spring 43, the rotating rod 44 can automatically position itself after rotating to the correct position, keeping the rotating rod 44 in the locked or unlocked position, thereby ensuring the stability of the connection and the reliability of the operation.

[0035] The outer side of the connecting seat 42 is provided with an indicator mark to indicate the current working status of the rotating rod 44. There are two types of indicator marks: ON and OFF. ON corresponds to the loose state. When it is in the ON state, the second step shaft is aligned with the fixing block 45. The fixing block 45 can slide freely in the mounting groove, so that the positioning pressure plate 2 is in a detachable release state, which is convenient for quick removal.

[0036] OFF corresponds to the locking state. When in the OFF state, the first step shaft is aligned with the fixing block 45, the fixing block 45 is firmly pressed into the mounting groove and tightly fits with the fixing groove 411, thereby achieving a stable connection between the connecting seat 42 and the fixing seat 41, and firmly fixing the positioning plate 2 to the base 1 to ensure that no displacement occurs during the processing.

[0037] The clear and unambiguous indicator markings allow operators to quickly identify the current status, improving operational safety and efficiency. The entire structure achieves a self-locking function through mechanical linkage, allowing for assembly and disassembly without additional tools, making it suitable for production scenarios involving frequent workpiece changes.

[0038] When the rotary rod 44 is in the locked state, pressing the knob 442 disengages the sliding pin 444 from the slot 422. Then, rotating the knob 442 causes the rotary rod 44 to rotate in the ON direction, engaging the sliding pin 444 with the sliding groove 421, thus releasing the knob 442. The return spring 43 then pushes the sliding pin 444 along the spiral keyway and rotates 90 degrees until it engages with the other end slot 422, completing the switch from the locked to the unlocked state. At this point, the second-step shaft aligns with the fixing block 45, and the fixing block 45 returns to its free state within the mounting groove. The constraint between the connecting seat 42 and the fixing seat 41 is released, allowing the positioning plate 2 to be removed for workpiece replacement or adjustment.

[0039] Conversely, when the rotary rod 44 is in the loose state, simply pressing down on the knob 442 will disengage the sliding pin 444 from the slot 422 and allow it to slide in the opposite direction along the sliding groove 421 and rotate 90 degrees in the opposite direction. When the sliding pin 444 slides to the end of the sliding groove 421, the spring force of the return spring 43 will cause the sliding pin 444 to automatically engage in the corresponding slot 422, thus completing the switch from the loose state to the locked state. At this time, the first stepped shaft is aligned with the fixed block 45, and the fixed block 45 is firmly pressed into the mounting groove. A rigid connection is formed between the connecting seat 42 and the fixed seat 41, thereby firmly fixing the positioning plate 2 to the base 1 and ensuring that the workpiece will not be displaced during processing.

[0040] The entire switching process is smooth and reliable, requiring only pressing and rotating to lock or release, greatly improving the installation and removal efficiency of the positioning plate 2. This allows operators to quickly change and position workpieces, making it particularly suitable for automated production lines and high-cycle processing scenarios. Clear ON and OFF indicators help operators visually identify the current locking status, thus avoiding safety hazards caused by misoperation. This improves operational accuracy and safety, ensuring efficient and stable production processes.

[0041] A plurality of limiting grooves 31 are linearly arrayed along the length and width of the positioning plate 2, enabling multiple workpieces to be processed simultaneously in a single wire EDM, improving processing efficiency and ensuring dimensional consistency of each workpiece. The limiting grooves 31 include concentric positioning grooves 311 and angular positioning grooves 312. The concentric positioning grooves 311 are used to achieve radial positioning of the workpieces, ensuring that the centers of the workpieces are all located on the same straight line, and ensuring that multiple workpieces are located on the same axis, avoiding processing errors caused by eccentricity. The angular positioning grooves 312 match the outer contour of the workpiece, used to limit the circumferential angular position of the workpiece, preventing rotational displacement during processing.

[0042] In this embodiment, the positioning plate 3 consists of a concentric positioning block 32 and a directional positioning block 33. A concentric positioning groove 311 and an angular positioning groove 312 are respectively disposed through one end of the concentric positioning block 32 and the directional positioning block 33. By dividing the positioning plate 3 into two independent components, the concentric positioning block 32 and the directional positioning block 33, and by setting the concentric positioning groove 311 and the angular positioning groove 312 on the two independent components, the concentric positioning block 32 and the directional positioning block 33 can be replaced or adjusted individually according to the positioning requirements of different workpieces, without the need to replace the entire positioning plate 3. This significantly reduces maintenance costs and improves the versatility and flexibility of the positioning system.

[0043] Furthermore, the number of positioning plates 3 can be one or more. When there is only one positioning plate 3, it corresponds to a concentric positioning block 32 and an directional positioning block 33. The concentric positioning block 32 has several concentric positioning grooves 311, and the directional positioning block 33 has several angular positioning grooves 312. The single-plate design is suitable for production scenarios with relatively simple workpiece types and large batches, and can achieve efficient and stable processing cycles through standardized positioning. However, when the shape or size of the workpiece changes, the entire positioning plate 3 needs to be replaced.

[0044] The multi-plate design is suitable for mixed-line production scenarios with multiple varieties and small batches. By configuring multiple concentric positioning blocks 32 and directional positioning blocks 33 with different slot shapes or sizes, operators can quickly combine and match the corresponding positioning modules according to actual processing needs, realize simultaneous processing or switching between different workpieces, reduce production costs, improve the flexibility and adaptability of fixtures, and meet the needs of fixture changeover and reuse for small-batch, multi-variety production.

[0045] In this embodiment, a design using multiple positioning plates 3 is employed, enabling rapid changeover through modular combination to adapt to the mixed processing requirements of various workpieces. Each positioning plate 3 uses a positioning pin 14 as a positioning reference to ensure the repeatability of its installation position and the consistency between them. This ensures high repeatability of the positioning system after each replacement or adjustment, reducing processing errors caused by installation deviations.

[0046] The beneficial effects of this utility model are as follows: The design of several limiting grooves 31 enables the pre-positioning and installation of multiple workpieces. Through the coordinated action of the limiting flange 13, the positioning pin 14, and the counter-pressure spring 12, the positioning plate 3 slides stably within the opening groove 11, consistently applying pressure towards the positioning pressure plate 2. This, in conjunction with the positioning pressure plate 2 on one side of the base 1, achieves simultaneous clamping and positioning of multiple workpieces, thereby improving clamping efficiency and positioning accuracy, and ensuring the consistency and stability of wire EDM processing.

[0047] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A multi-station fixture for wire EDM, characterized in that, The device includes a base (1) and a positioning plate (2) detachably mounted on one side of the base (1). The base (1) has an opening groove (11) on the side near the positioning plate (2). A positioning plate (3) that cooperates with the positioning plate (2) is slidably mounted in the opening groove (11) by a counter-pressure spring (12). Both sides of the opening groove (11) are provided with limiting flanges (13) and positioning pins (14) that cooperate with the positioning plate (3). The positioning plate (3) is provided with a plurality of limiting grooves (31) for fixing the workpiece.

2. The multi-station fixture for wire EDM according to claim 1, characterized in that: The positioning plate (2) is detachably mounted on one side of the base (1) via a quick-release assembly (4).

3. The multi-station fixture for wire EDM according to claim 2, characterized in that: The quick-release assembly (4) includes a fixed seat (41) and a connecting seat (42). The connecting seat (42) has a slidable rotating rod (44) inside. One end of the connecting seat (42) has a plurality of fixed blocks (45) that slide with the rotating rod (44). The fixed seat (41) has a fixing groove (411) that cooperates with the plurality of fixed blocks (45).

4. A multi-station fixture for wire EDM according to claim 3, characterized in that: The fixing block (45) has a spherical structure.

5. A multi-station fixture for wire EDM according to claim 3, characterized in that: The rotating rod (44) includes a rod body (441) and a knob (442) located at one end of the rod body (441). The other end of the rod body (441) is provided with a stepped shaft (443) that cooperates with the fixing block (45).

6. A multi-station fixture for wire EDM according to claim 3, characterized in that: The rotating rod (44) is slidably installed in the connecting seat (42) by a return spring (43). A sliding pin (444) is provided on the outside of the rotating rod (44). A sliding groove (421) that cooperates with the sliding pin (444) is provided through the outside of the connecting seat (42). Both ends of the sliding groove (421) are provided with slots (422) that cooperate with the sliding pin (444).

7. A multi-station fixture for wire EDM according to claim 6, characterized in that: The sliding groove (421) is a spiral keyway, and the rotation angle of the spiral keyway is 90 degrees.

8. A multi-station fixture for wire EDM according to claim 1, characterized in that: The limiting groove (31) includes a concentric positioning groove (311) and an angular positioning groove (312).

9. A multi-station fixture for wire EDM according to claim 8, characterized in that: The positioning plate (3) is composed of a concentric positioning block (32) and a directional positioning block (33), and the concentric positioning groove (311) and the angular positioning groove (312) are respectively disposed through one end of the concentric positioning block (32) and the directional positioning block (33).

10. A multi-station fixture for wire EDM according to any one of claims 1-9, characterized in that: The number of the positioning plates (3) is one or more.

Images