Adjustable numerical control index plate

Abstract

The utility model relates to numerical control machine tool technical field, concretely relates to an adjustable numerical control index plate, including index plate main part and the index plate that rotates setting in one side of index plate main part, the index plate is away from index plate main part one side and is equipped with a plurality of dovetail groove for installing work piece, the index plate is close to index plate main part one side and is equipped with the circular cavity that links to a plurality of dovetail groove, the utility model discloses a extrusion circular platform simultaneously with a plurality of work piece bottom dovetail block interaction, when telescopic electric jar action, push mounting seat and extrusion circular platform movement to index plate direction, the tapered extrusion circular platform enters circular cavity, utilizes its inclined plane structure, simultaneously, evenly to all work piece that surrounds its circumferential arrangement produces radial outward extrusion force, makes all work piece dovetail block synchronous locking in the dovetail groove of index plate, this mechanism ensures that all work piece datum is uniform, and positioning accuracy is high, and locking action is quick, has improved chucking efficiency greatly.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tool technology, specifically to an adjustable CNC indexing plate. Background Technology

[0002] The CNC indexing plate is a key functional component of CNC machining centers, CNC milling machines, and other equipment. Its core function is to drive the workpiece to perform precise angular displacement under the control of the CNC system, thereby achieving multi-face machining in a single clamping, which greatly improves machining efficiency and accuracy.

[0003] Existing CNC indexing tables have significant shortcomings in workpiece clamping. First, for situations requiring the simultaneous machining of multiple small workpieces, multiple fixtures typically need to be individually installed on the indexing table to position and lock each workpiece one by one. This process is not only time-consuming and labor-intensive, but also makes it difficult to ensure that all workpieces have a consistent reference point relative to the indexing table's rotation center, resulting in poor machining consistency and excessively long setup and debugging times.

[0004] Secondly, in order to adapt to the shape of the bottom of different workpieces (for example, some workpieces have dovetail-shaped sliders on the bottom), it is necessary to replace the positioning or locking elements on the indexing plate that match them. The traditional replacement method often requires disassembling multiple fastening bolts, which is cumbersome, requires many tools, and requires recalibration after reinstallation, which seriously affects the production changeover efficiency of the equipment and cannot meet the requirements of modern flexible manufacturing systems for "rapid commissioning".

[0005] Therefore, there is an urgent need for a CNC indexing plate that can achieve synchronous and rapid locking of multiple workpieces and can quickly change the locking elements according to the shape of the workpiece, in order to solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this invention is to address the aforementioned deficiencies in the prior art by providing an adjustable CNC indexing plate that can simultaneously and quickly lock and fix multiple workpieces. Furthermore, its core locking element—the extrusion platform—can be quickly and conveniently replaced according to the different shapes of the dovetail blocks at the bottom of the workpiece, greatly shortening the changeover and debugging time.

[0007] To achieve the above objectives, this utility model provides the following technical solution: This utility model provides an adjustable CNC indexing plate, including an indexing plate body and an indexing plate rotatably disposed on one side of the indexing plate body. The indexing plate has a plurality of dovetail grooves for mounting workpieces on the side away from the indexing plate body, and a circular cavity connected to the plurality of dovetail grooves is formed on the side of the indexing plate close to the indexing plate body.

[0008] The indexing plate has a mounting cavity on one side. A mounting seat is slidably mounted within the mounting cavity, and an insert plate is slidably inserted into the mounting seat. A matching extrusion frustum is fixedly mounted on one side of the insert plate and inserted into the cavity. Two horizontally placed guide plates are vertically fixed to one side of the inner wall of the mounting cavity. The two guide plates simultaneously slide into the insert plate and the mounting seat to provide precise sliding guidance. When the mounting seat slides to fit against the inner wall of the mounting cavity under the action of the driving device, the insert plate is pulled out from the guide plate, at which point the insert plate and the extrusion frustum can be replaced.

[0009] Furthermore, fixing blocks are vertically fixed at the four corners of the mounting cavity opening, and each of the four fixing blocks has a threaded hole. A door panel is placed at the mounting cavity opening, and screws are threadedly inserted between the door panel and the four fixing blocks to achieve sealing and protection of the mounting cavity.

[0010] Furthermore, the outer wall of the door panel is flush with the side wall of the indexing plate body, maintaining the clean appearance of the equipment. Several equally spaced heat dissipation holes are provided through the door panel to ensure heat dissipation for the drive components within the mounting cavity.

[0011] Furthermore, a handle is vertically fixed to one side of the insertion plate for easy manual pulling. A telescopic electric cylinder is also vertically fixed to the back of the indexing plate body, serving as the power source for driving the extension and retraction of the mounting base.

[0012] Furthermore, the output shaft of the telescopic electric cylinder extends through into the mounting cavity and is vertically fixedly connected to the mounting base.

[0013] The beneficial effects of this utility model are: This invention utilizes a single extrusion frustum that interacts simultaneously with dovetail blocks at the bottom of multiple workpieces. When the telescopic electric cylinder is activated, pushing the mounting base and extrusion frustum towards the indexing plate, the conical extrusion frustum enters the circular cavity. Utilizing its inclined surface structure, it simultaneously and uniformly generates radially outward extrusion force on all workpieces arranged around its circumference, causing the dovetail blocks of all workpieces to be synchronously locked in the dovetail grooves of the indexing plate. This radial force is decomposed into a positive pressure perpendicular to the sidewall of the dovetail groove through the inclined surface of the dovetail block at the bottom of the workpiece. Reliable locking is achieved through friction and mechanical interlocking. This mechanism ensures that all workpieces have a unified reference, high positioning accuracy, and rapid locking action, greatly improving clamping efficiency. The core innovation of this utility model lies in the quick-change design of the extrusion frustum. When processing workpieces with different bottom shapes, simply control the telescopic electric cylinder to retract and pull the mounting base to a position where it fits against the inner wall of the mounting cavity. At this time, the insert plate with the extrusion frustum fixed on it will completely detach from the guide plate and release the guide constraint from the mounting base. The operator can easily pull the entire insert plate-extrusion frustum assembly directly out of the mounting base using the handle. After replacing it with an extrusion frustum assembly that matches the new workpiece dovetail block, the replacement can be completed by reversing the operation. The entire process does not require any additional tools or complex calibration, achieving "plug and play" and significantly improving the flexibility of the equipment and the speed of production changeover and debugging. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of this utility model after the door panel has been removed; Figure 3 This is a schematic diagram of the extrusion frustum mounting structure of this utility model; Figure 4 This is a schematic diagram of the sliding connection structure between the mounting base and the insert plate of this utility model.

[0016] The labels in the diagram represent: 1. Indexing plate body; 11. Indexing plate; 12. Mounting cavity; 13. Door panel; 21. Mounting base; 22. Insert plate; 23. Extrusion frustum; 24. Handle; 25. Guide plate; 26. Telescopic electric cylinder. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0018] The present invention will be further described below with reference to the embodiments.

[0019] Example 1

[0020] Reference Figure 1-4 This is the first embodiment of the present invention. An adjustable CNC indexing plate includes an indexing plate body 1 and an indexing plate 11 rotatably disposed on one side of the indexing plate body 1. The side of the indexing plate 11 away from the indexing plate body 1 is precision milled and ground to form several dovetail grooves with a hardness of HRC60 or higher. The positioning accuracy of these dovetail grooves can be controlled within 0.02 mm. The side of the indexing plate 11 near the indexing plate body 1 is CNC turned to form a circular cavity that is precisely connected to the tail of the several dovetail grooves. The circular cavity and the extrusion table 23 are fitted with a clearance of H7 / g6 to ensure guiding accuracy.

[0021] The indexing plate body 1 serves as the basic support and transmission carrier of the entire device. Its internal components typically include the following key structures: drive motor, reduction mechanism, core rotary bearing, and electrical control system. Drive motor (not shown in the figure): usually a servo motor, fixedly installed inside the indexing plate body 1, is the power source for the rotation of the indexing plate 11; The reduction mechanism (not shown in the figure) generally adopts a high-precision worm gear pair. The worm is connected to the output shaft of the drive motor, and the worm wheel is fixed to the rotary shaft of the indexing plate 11. It is used to reduce the speed, increase the torque and ensure self-locking accuracy. Core rotary bearing (not shown in the figure): Usually a crossed roller bearing or a high-precision double-row roller bearing is used. Its outer ring is fixed on the indexing plate body 1, and its inner ring is connected to the indexing plate 11 to support the indexing plate 11 to bear radial and axial loads and ensure its rotational accuracy. Electrical control system (not shown in the figure): includes an encoder for the rotation angle of the feedback indexing plate 11 and an interface for communication with the CNC machine tool; The innovative module of this utility model—the quick locking and replacement mechanism—is cleverly integrated into the indexing plate body 1. Specifically, a mounting cavity 12 is opened on the side of the indexing plate body 1. This mounting cavity 12 is independent of the aforementioned drive and transmission system and is specifically used to accommodate the locking drive component. The mounting cavity 12 utilizes a linear guide system to achieve precise telescopic sliding of the mounting base 21. The mounting base 21 is made of 45# steel and has a heat-treated internal slot that precisely slides into the insert plate 22, with the clearance controlled within the range of 0.01-0.02 mm. On one side of the insert plate 22, a matching extrusion frustum 23 is fixedly mounted to a corresponding cavity using four 12.9 grade high-strength internal hexagonal screws. Two horizontally placed guide plates 25 are vertically fixed to one side of the inner wall of the mounting cavity 12. These guide plates 25 are pressed into positioning holes on the wall of the mounting cavity 12 with an interference fit, and simultaneously slide precisely into guide holes of corresponding sizes on the insert plate 22 and the mounting base 21. DU self-lubricating bearing bushings are inlaid in the guide holes to reduce friction and wear. When the mounting base 21 slides to fit against the inner wall of the mounting cavity 12 under the action of the drive mechanism, the guide holes on the insert plate 22 completely disengage from the guide plates 25. At this point, the insert plate 22 and the mounting base 21 are only connected by an insertion joint and are in a replaceable state.

[0022] Example 2

[0023] Based on Example 1, Q235A steel fixing blocks are vertically fixed at the four corners of the mounting cavity 12 by welding. Each of the four fixing blocks has a through-hole with an M8 standard thread. A detachable door panel 13 is placed at the opening of the mounting cavity 12. The door panel 13 is made of HT300 cast iron, the same material as the indexing plate body 1, and is securely connected to the four fixing blocks by four M8x25 stainless steel hexagonal screws. The outer wall of the door panel 13 is precision machined to be flush with the side wall of the indexing plate body 1, ensuring the overall integrity and aesthetics of the equipment. Several equally spaced oval heat dissipation holes are CNC laser-cut into the door panel 13. The total area of ​​the heat dissipation holes is thermodynamically calculated to ensure it meets the heat dissipation requirements of the components inside the mounting cavity.

[0024] A 6061 aluminum alloy handle 24 with an anti-slip knurled surface is vertically fixed to one side of the insertion plate 22 via welding. A servo electric cylinder 26, serving as a telescopic cylinder, is vertically fixed to the back of the indexing plate body 1 via a flange. This electric cylinder has an IP67 protection rating and a rated thrust of up to 5000N. The output shaft of the telescopic cylinder 26 extends into the mounting cavity 12 via a Morse taper connection and is vertically fixed to the connecting seat on the back of the mounting base 21 with an interference fit. This connection method effectively transmits high torque and ensures coaxiality. The control cable of the electric cylinder is connected to the CNC system through a pre-set wire groove inside the indexing plate body 1, achieving precise position and speed control.

[0025] The remaining structure is the same as that in Example 1.

[0026] Work process Locking process: The CNC system issues a command, the telescopic electric cylinder 26 extends, and pushes the mounting base 21 to slide along the guide plate 25 toward the indexing plate 11. The extrusion frustum 23 fixed on the insert plate 22 then enters the circular cavity on the back of the indexing plate 11. As the extrusion frustum 23 goes deeper, its conical surface contacts the inner inclined surface of the dovetail block of the workpiece, generating radial expansion force, which locks multiple workpieces synchronously and evenly in the dovetail groove of the indexing plate 11. Replacement Process: When the extrusion frustum 23 needs to be replaced to accommodate a new workpiece, the telescopic cylinder 26 retracts, pulling the mounting base 21 backward until it is flush with the inner wall of the mounting cavity 12. At this point, the guide hole on the insert plate 22 has completely disengaged from the guide plate 25. The operator can easily pull the insert plate 22 along with the extrusion frustum 23 out of the slot in the mounting base 21 by holding the handle 24. Then, the pre-installed new insert plate 22 and extrusion frustum 23 assembly is inserted into the slot in the mounting base 21, ensuring that the guide hole on the insert plate 22 is aligned with the guide plate 25, thus completing the replacement. Finally, the telescopic cylinder 26 extends again, pushing the mounting base 21 and the new assembly forward, causing the guide plate 25 to re-insert into the guide hole of the insert plate 22, and the entire mechanism returns to the working ready state.

[0027] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. An adjustable CNC indexing plate, comprising an indexing plate body (1) and an indexing plate (11) rotatably disposed on one side of the indexing plate body (1), wherein the indexing plate (11) has a plurality of dovetail grooves on the side away from the indexing plate body (1), and the indexing plate (11) has a circular cavity communicating with the plurality of dovetail grooves on the side closer to the indexing plate body (1), and a mounting cavity (12) is provided on one side of the indexing plate body (1), characterized in that, An installation seat (21) is telescopically slidably installed in the installation cavity (12). An insert plate (22) is slidably inserted into the installation seat (21). A matching extrusion frustum (23) is fixedly installed on one side of the insert plate (22) and inserted into the circular cavity. Two horizontally placed guide plates (25) are vertically fixedly installed on one side of the inner wall of the installation cavity (12). The two guide plates (25) are simultaneously slidably inserted into the insert plate (22) and the installation seat (21). When the installation seat (21) slides to fit against the inner wall of the installation cavity (12), the insert plate (22) is pulled out from the guide plate (25).

2. The adjustable CNC indexing plate according to claim 1, characterized in that, The four corners of the mounting cavity (12) are each fixedly mounted with a fixing block, and each of the four fixing blocks has a threaded hole. A door panel (13) is placed at the opening of the mounting cavity (12), and screws are threadedly inserted between the door panel (13) and the four fixing blocks.

3. The adjustable CNC indexing plate according to claim 2, characterized in that, The outer wall of the door panel (13) is flush with the side wall of the indexing plate body (1), and the door panel (13) has several heat dissipation holes that are evenly spaced vertically.

4. The adjustable CNC indexing plate according to claim 1, characterized in that, A handle (24) is vertically fixed on one side of the insert plate (22), and a telescopic electric cylinder (26) is vertically fixed on the back of the indexing plate body (1).

5. An adjustable CNC indexing plate according to claim 4, characterized in that, The output shaft of the telescopic electric cylinder (26) extends through into the mounting cavity (12) and is vertically fixedly connected to the mounting base (21).

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