Push positioning structure of numerical control machine tool

Abstract

The utility model discloses a push positioning structure of numerical control machine tool relates to push positioning structure technical field, including machine tool body, is provided with conveying table on it, and the top of conveying table is installed with benchmark plate and push board, and benchmark plate and push board are installed respectively in the both sides of transmission platform, and push board is relative to benchmark plate linear movement, and the both ends of benchmark plate are round corner settings, the waste chip temporary storage groove of benchmark plate side vertical convex structure formation, make the waste chip that push board pushes work piece in the process be cleaned or extruded and fall into the groove naturally, cooperate the synergistic effect of cleaning mechanism, and screw slide rail subassembly drive displacement board, elastic expansion board drive clean brush structure along benchmark plate axis steady movement, and the pre -tightening pressure that elastic expansion board continues to exert ensures that clean doctor blade is closely attached benchmark plate positioning work surface, and the cooperation of ball lever and guide groove and the elastic deformation avoidance effect of silica gel board body on clean doctor blade, have realized that benchmark plate plane section and both ends round corner section realize full range dead angleless clean brush.

Description

Technical Field

[0001] This utility model relates to the field of push positioning structure technology, and in particular to push positioning structure for CNC machine tools. Background Technology

[0002] In mass production scenarios, the efficiency and stability of CNC machine tools become even more valuable. To ensure the consistency of processing parameters for the same batch of workpieces, the workpieces must first be accurately positioned in a fixed processing location to avoid batch scrap due to workpiece placement deviations. For batch workpieces with regular shapes, the industry often uses a simple positioning structure of "reference plate + push plate": the reference plate provides a fixed positioning reference surface, clearly defining the coordinate reference of the workpiece; the push plate is driven by a cylinder or lead screw, using a stable thrust to smoothly push the workpiece from its initial placement position to the reference plate and press it firmly, quickly completing the positioning of a single workpiece. This eliminates the need for complex operations and can adapt to the continuous rhythm requirements of batch processing.

[0003] However, in actual continuous processing, during the initial handling and storage of batch workpieces, coolant residue, cutting debris, or oil stains from the material itself can easily adhere to their surfaces. Simultaneously, tiny waste chips generated from the previous workpiece's processing may not be cleaned in time, accumulating on the edge of the reference plate or the worktable. When the push plate moves the workpiece closer to the reference plate, these impurities are squeezed between the bottom of the workpiece and the worktable, or stuck between the contact surfaces of the workpiece and the reference plate. This results in the workpiece appearing to be firmly attached to the reference, but actually exhibiting slight "suspended" or tilted behavior. During subsequent cutting, drilling, and other processing, this hidden deviation translates into inaccurate machining depth and substandard surface flatness, disrupting the consistency of precision across batch workpieces and potentially increasing rework or scrap costs, becoming a "hidden obstacle" affecting batch processing efficiency.

[0004] Therefore, this utility model proposes a push and positioning structure for CNC machine tools to solve the above problems. Utility Model Content

[0005] In view of the problems existing in the prior art, this utility model is proposed.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a push and positioning structure for a CNC machine tool, comprising:

[0007] The machine tool body is provided with a conveyor table. A reference plate and a push plate are installed on the top of the conveyor table. The reference plate and the push plate are respectively installed on both sides of the conveyor table, and the push plate moves linearly relative to the reference plate. The two ends of the reference plate are rounded.

[0008] The cleaning mechanism includes a displacement adjustment structure, a movable connection structure, and a cleaning structure. The cleaning structure is in close contact with the side of the reference plate facing the workpiece and is rotatably connected to the displacement adjustment structure through the movable connection structure. The displacement adjustment structure drags the cleaning structure to move on the surface of the reference plate and drives the cleaning structure to rotate through the movable connection structure.

[0009] As a preferred embodiment of the push and positioning structure of the CNC machine tool described in this utility model, the reference plate includes a vertical part and a protruding part. The protruding part is located on the side of the vertical part facing the workpiece, and there is a waste chip storage groove between the protruding part and the conveyor table. Guide grooves with guide cleaning structures are provided on the upper and lower sides of the protruding part.

[0010] As a preferred embodiment of the push positioning structure of the CNC machine tool described in this utility model, the cleaning structure includes a cleaning scraper that is consistent with the contour of the positioning working surface of the reference plate facing the workpiece. The surface of the cleaning scraper is provided with two parallel rectangular clearance grooves in the transverse direction, and the surface of the cleaning scraper is provided with two sets of ball rods extending into the guide grooves. The ball rods are arranged in the shape of straight shafts with balls at the ends.

[0011] As a preferred embodiment of the push positioning structure of the CNC machine tool described in this utility model, the movable connection structure includes two positioning pins inserted into a rectangular clearance groove, one end of the two positioning pins is fixed with a long sleeve, a long sleeve shaft is inserted into the long sleeve, and the top end of the long sleeve is fixed with the displacement adjustment structure.

[0012] As a preferred embodiment of the push positioning structure of the CNC machine tool described in this utility model, the displacement adjustment structure includes an elastic telescopic plate spanning above the reference plate, one end of the elastic telescopic plate being fixed to a long sleeve shaft, the other end of the long sleeve shaft being fixed to a displacement plate, and the top end of the displacement plate being assembled to a lead screw slide rail assembly arranged along the axis of the reference plate.

[0013] As a preferred embodiment of the push and positioning structure of the CNC machine tool described in this utility model, the lead screw slide rail assembly includes a U-shaped frame plate and a plurality of lifting feet disposed at the bottom end of the U-shaped frame plate. A lead screw and a guide rod are rotatably connected inside the U-shaped frame plate. A drive motor is connected to one end of the lead screw that passes through the U-shaped frame plate. A guide base is sleeved on the surface of the lead screw, and a threaded base is sleeved on the surface of the guide rod. The guide base and the threaded base are respectively fixed to the bottom surface of the displacement plate.

[0014] The beneficial effects of this utility model are as follows: By setting the length of the reference plate to be greater than the length of the workpiece to form a redundant positioning section, it is ensured that the entire side of the workpiece can completely fit the positioning working surface of the reference plate when it is driven to abut against the reference plate by the pushing mechanism. At the same time, the waste chip storage groove formed by the convex structure on the side of the reference plate allows the waste chips that are swept or pressed by the rail during the pushing process of the workpiece to fall naturally into the groove. With the coordinated action of the cleaning mechanism, the screw slide rail assembly drives the displacement plate and the elastic telescopic plate to move the cleaning brush structure smoothly along the axis of the reference plate. The pre-tightening pressure continuously applied by the elastic telescopic plate ensures the cleaning scraper The blade fits tightly against the positioning surface of the reference plate. The cooperation between the ball rod and the guide groove, as well as the elastic deformation of the silicone plate on the cleaning scraper, enables full-range, dead-angle-free cleaning of the flat section and the rounded corners at both ends of the reference plate. This thoroughly removes various attached impurities and sweeps them to both ends of the reference plate. In non-cleaning states, the cleaning scraper can be moved to both sides of the reference plate without interfering with the normal movement of the workpiece. This fundamentally ensures the accuracy of workpiece positioning, significantly improves the consistency of processing precision for batch workpieces, reduces inaccurate processing depth and substandard surface flatness, and lowers rework and scrap costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments 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.

[0016] Figure 1 This is a schematic diagram of the push and positioning structure of the CNC machine tool in this utility model;

[0017] Figure 2 This is a schematic diagram of the cleaning mechanism in this utility model;

[0018] Figure 3 This utility model Figure 2 Enlarged view of the A-section structure;

[0019] Figure 4 This is a schematic diagram of the structure of the reference plate in this utility model.

[0020] Explanation of reference numerals in the attached drawings: 01. Machine tool body; 02. Conveyor table; 03. Cleaning mechanism; 0311. U-shaped frame plate; 0312. Drive motor; 0313. Guide rod; 0314. Lead screw; 0315. Guide base; 0316. Threaded base; 0317. Displacement plate; 0318. Elastic telescopic plate; 032. Movable connection structure; 0321. Long sleeve shaft; 0322. Long sleeve; 0323. Positioning pin; 033. Cleaning brush structure; 0331. Cleaning scraper; 0332. Rectangular clearance groove; 0333. Ball rod; 04. Reference plate; 041. Guide groove; 042. Vertical part; 043. Protrusion; 05. Workpiece; 06. Push plate. Detailed Implementation

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0024] Reference Figures 1-4 As shown, this embodiment provides a push-positioning structure for a CNC machine tool, including workpiece 05, and further including:

[0025] The machine tool body 01 is provided with a conveyor table 02 for conveying workpiece 05. A reference plate 04 and a push plate 06 are installed on the top of the conveyor table 02. A standard displacement space for accommodating workpiece 05 is formed between the reference plate 04 and the push plate 06. The reference plate 04 is fixed to one side of the conveyor table 02, and the push plate 06 moves to the other side of the conveyor table 02 and is opposite to the reference plate 04. A push mechanism (not shown) is also provided on the side of the push plate 06 away from the reference plate 04. The push mechanism pushes the push plate 06 to move linearly toward the reference plate 04 to clamp and push the workpiece 05 to abut against one side of the reference plate 04. The two ends of the reference plate 04 are rounded.

[0026] Furthermore, the length of the reference plate 04 is set to be greater than the length of the workpiece 05, and the part that extends beyond both ends of the workpiece 05 forms a redundant positioning segment, ensuring that when the workpiece 05 is driven by the pushing mechanism to abut against the reference plate 04, the entire side of the workpiece 05 can completely fit against the positioning working surface of the reference plate 04.

[0027] The cleaning mechanism 03 includes a displacement adjustment structure, a movable connection structure 032, and a cleaning structure 033. The cleaning structure 033 is in close contact with the side of the reference plate 04 facing the workpiece 05 and is rotatably connected to the displacement adjustment structure through the movable connection structure 032. The displacement adjustment structure drags the cleaning structure 033 to move on the surface of the reference plate 04 through the movable connection structure 032 and drives the cleaning structure 033 to rotate.

[0028] Reference Figure 3 and Figure 4 The reference plate 04 is a side-standing convex plate. The reference plate 04 includes a vertical part 042 and a protrusion 043. The protrusion 043 is located on the side of the vertical part 042 facing the workpiece 05, and a waste storage groove for accommodating waste is formed between the protrusion 043 and the conveyor table 02. Guide grooves 041 of the guide cleaning structure 033 are provided on the upper and lower sides of the protrusion 043.

[0029] Furthermore, during the processing of the preceding workpiece 05, tiny debris is easily generated. This debris may accumulate in the edge gaps of workpiece 05 or on the surface of the conveyor table 02 if not cleaned in time. When the pushing mechanism drives the pushing plate 06 to move towards the reference plate 04, the pushing plate 06 pushes the workpiece 05 while simultaneously adhering the debris on the workpiece 05 to the reference plate 04. At the same time, it sweeps the tiny debris attached to the surface of the conveyor table 02 and the bottom of the workpiece 05 towards the reference plate 04. As the workpiece 05 is pushed close to the reference plate 04, its side will squeeze the debris accumulated on the edge of the reference plate 04 towards the protrusion 043. Since the protrusion 043 protrudes from the vertical part 042 and forms a recessed debris storage groove with the conveyor table 02, the pushed or squeezed debris will naturally fall into the storage groove.

[0030] Furthermore, the cleaning structure 033 includes a cleaning scraper 0331 whose positioning working surface contour is consistent with that of the reference plate 04 facing the workpiece 05. The surface of the cleaning scraper 0331 is provided with two parallel rectangular clearance grooves 0332, and the surface of the cleaning scraper 0331 is provided with two sets of ball rods 0333 extending into the guide groove 041. The ball rods 0333 are arranged in the shape of a straight shaft with a ball at the end. One end of the straight shaft is fixedly connected to the cleaning scraper 0331, and the other end is integrally formed with a ball head.

[0031] Furthermore, the section of the cleaning scraper 0331 near the vertical part 042 of the reference plate 04 is made of silicone material, and this silicone plate is fixedly connected to the main structure of the cleaning scraper 0331. When the cleaning scraper 0331 rotates in space around the ball rod 0333 as the rotation center, the silicone plate can generate adaptive clearance through its own elastic deformation, providing sufficient space freedom for the rotation of the cleaning scraper 0331 and avoiding rigid interference with the reference plate 04.

[0032] Furthermore, the rounded corners at both ends of the reference plate 04 are circular at the end of the guide groove 041, and the distance between the guide groove 041 and the edge of the protrusion 043 is the radius.

[0033] Furthermore, the movable connection structure 032 includes two positioning pins 0323 inserted into the rectangular clearance groove 0332. One end of each positioning pin 0323 is fixed with a long sleeve 0322. A long sleeve shaft 0321 is inserted into the long sleeve 0322. The top end of the long sleeve 0322 is fixed to the displacement adjustment structure.

[0034] Furthermore, the displacement adjustment structure includes an elastic telescopic plate 0318 spanning above the reference plate 04. One end of the elastic telescopic plate 0318 is fixed to the long sleeve shaft 0321, and the other end of the long sleeve shaft 0321 is fixed to a displacement plate 0317. The top of the displacement plate 0317 is assembled to a lead screw 0314 slide rail assembly arranged along the axis of the reference plate 04.

[0035] Furthermore, the elastic telescopic plate 0318 is stretched and extended axially under the action of external force, and when the external force disappears, the elastic telescopic plate 0318 automatically contracts and returns to its original position by means of its own elastic restoring force.

[0036] Refer to 1 and Figure 2 As shown, the lead screw 0314 slide rail assembly includes a U-shaped frame plate 0311 and multiple lifting feet disposed at the bottom end of the U-shaped frame plate 0311. The lead screw 0314 and the guide rod 0313 are rotatably connected inside the U-shaped frame plate 0311. One end of the lead screw 0314 that passes through the U-shaped frame plate 0311 is connected to a drive motor 0312. A guide base 0315 is sleeved on the surface of the lead screw 0314. A threaded base 0316 is sleeved on the surface of the guide rod 0313. The guide base 0315 and the threaded base 0316 are respectively fixed to the bottom surface of the displacement plate 0317.

[0037] Working principle: When the drive motor 0312 rotates, its output shaft drives the lead screw 0314 to rotate synchronously. Since the threaded base 0316 is threadedly engaged with the lead screw 0314 and is restricted by the guide rod 0313, it cannot rotate with the lead screw 0314. Therefore, the threaded base 0316 will move linearly along the axial direction of the lead screw 0314. Simultaneously, the guide base 0315 slides synchronously on the guide rod 0313 along with the threaded base 0316. This drives the displacement plate 0317 and the elastic telescopic plate 0318 to move smoothly and synchronously along the axial direction of the reference plate 04. Furthermore, the long sleeve shaft 0321, long sleeve 0322, and positioning pin 0323 pull the cleaning structure 033 to move as a whole.

[0038] Under the guidance of the ball of the rod 0333 rolling along the guide groove 041, the cleaning scraper 0331 always maintains a close fit with the positioning working surface of the reference plate 04. The elastic telescopic plate 0318 keeps the contact resistance between the cleaning scraper 0331 and the working surface in a slightly stretched state. Its elastic restoring force continuously applies a pre-tightening pressure to the cleaning scraper 0331 toward the working surface, ensuring that the scraper edge of the cleaning scraper 0331 can be tightly fitted to the surface of the reference plate 04 to peel off the attached waste.

[0039] When the cleaning scraper 0331 moves with the displacement adjustment structure to the rounded corners at both ends of the reference plate 04, and can no longer advance with the displacement adjustment structure, the displacement adjustment structure pushes the cleaning scraper 0331 to move through the movable connection structure 032. The movable connection structure 032 moves within the rectangular clearance groove 0332, causing the cleaning scraper 0331 to rotate around the ball rod 0333, so that the cleaning scraper 0331 adheres to the rounded corner surface of the reference plate 04 for rotational cleaning. During this process, the silicone plate near the vertical part 042 of the cleaning scraper 0331 undergoes adaptive elastic deformation due to the rotation, providing sufficient clearance for its spatial rotation and preventing rigid collision or jamming with the reference plate 04. Meanwhile, the pre-tightening pressure of the elastic telescopic plate 0318 is always transmitted to the cleaning scraper 0331 through the movable connection structure 032, ensuring that its scraper blade can still closely fit the rounded corner contour during rotation, completely removing the waste attached to the rounded corner, and sweeping the waste on the surface of the reference plate 04 and the waste storage groove to both ends of the reference plate 04. Secondly, when not cleaning, its cleaning razor moves to both sides of the reference plate 04, without affecting the movement of the workpiece 05 in the standard displacement space.

[0040] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the object being described changes, the relative positional relationship may change.

[0041] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0042] In conclusion, the above are merely preferred embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A push-positioning structure for a CNC machine tool, comprising a workpiece (05), characterized in that... It also includes: The machine tool body (01) is provided with a conveyor table (02). A reference plate (04) and a push plate (06) are installed on the top of the conveyor table (02). The reference plate (04) and the push plate (06) are respectively installed on both sides of the conveyor table, and the push plate (06) moves linearly relative to the reference plate (04). The two ends of the reference plate (04) are rounded. The cleaning mechanism (03) includes a displacement adjustment structure, a movable connection structure (032), and a cleaning structure (033). The cleaning structure (033) is close to the side of the reference plate (04) facing the workpiece (05) and is rotatably connected to the displacement adjustment structure through the movable connection structure (032). The displacement adjustment structure drags the cleaning structure (033) to move on the surface of the reference plate (04) through the movable connection structure (032) and drives the cleaning structure (033) to rotate.

2. The push and positioning structure of the CNC machine tool as described in claim 1, characterized in that: The reference plate (04) includes a vertical part (042) and a protrusion (043). The protrusion (043) is located on the side of the vertical part (042) facing the workpiece (05), and there is a waste storage groove between the protrusion (043) and the conveyor table (02). The upper and lower sides of the protrusion (043) are provided with guide grooves (041) of the guide cleaning structure (033).

3. The push and positioning structure of the CNC machine tool as described in claim 2, characterized in that: The cleaning structure (033) includes a cleaning scraper (0331) whose positioning working surface contour is consistent with that of the reference plate (04) facing the workpiece (05). The surface of the cleaning scraper (0331) is provided with two parallel rectangular clearance grooves (0332), and the surface of the cleaning scraper (0331) is provided with two sets of ball rods (0333) extending into the guide groove (041). The ball rods (0333) are arranged in the shape of a straight shaft with a ball at the end.

4. The push and positioning structure of the CNC machine tool as described in claim 3, characterized in that: The movable connection structure (032) includes two positioning pins (0323) inserted into a rectangular clearance groove (0332). One end of each positioning pin (0323) is fixed with a long sleeve (0322). A long sleeve shaft (0321) is inserted into the long sleeve (0322). The top end of the long sleeve (0322) is fixed to the displacement adjustment structure.

5. The push and positioning structure of the CNC machine tool as described in claim 4, characterized in that: The displacement adjustment structure includes an elastic telescopic plate (0318) spanning above the reference plate (04). One end of the elastic telescopic plate (0318) is fixed to a long sleeve shaft (0321), and the other end of the long sleeve shaft (0321) is fixed to a displacement plate (0317). The top end of the displacement plate (0317) is assembled to a lead screw (0314) slide rail assembly arranged along the axis of the reference plate (04).

6. The push and positioning structure of the CNC machine tool as described in claim 5, characterized in that: The lead screw (0314) slide rail assembly includes a U-shaped frame plate (0311) and multiple lifting feet disposed at the bottom end of the U-shaped frame plate (0311). The lead screw (0314) and the guide rod (0313) are rotatably connected inside the U-shaped frame plate (0311). One end of the lead screw (0314) that passes through the U-shaped frame plate (0311) is connected to a drive motor (0312). A guide base (0315) is sleeved on the surface of the lead screw (0314), and a threaded base (0316) is sleeved on the surface of the guide rod (0313). The guide base (0315) and the threaded base (0316) are respectively fixed to the bottom surface of the displacement plate (0317).

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