An overtravel machining multi-point support device

Abstract

This utility model discloses a multi-point support device for overtravel machining, belonging to the field of CNC machine tool tooling technology. The device includes a worktable, a positioning body, a clamping mechanism, and a support mechanism. The positioning body is fixed to the worktable via a guiding mechanism and a first locking mechanism, and has a radially extending elongated hole. The support mechanism passes through the elongated hole and can move along it; it includes a support base, a height adjustment component, and a support head. The support base is locked to the worktable, and a second locking mechanism is provided between it and the inner wall of the elongated hole. The positioning body has multiple mounting holes on the side of the elongated hole, and the clamping mechanism can be selectively installed in different hole positions. This utility model, through its modular, adjustable multi-point support and multiple locking design, effectively solves the problems of insufficient workpiece support rigidity and easy vibration deformation in CNC vertical lathe overtravel machining. It has strong versatility, high clamping efficiency, and safely and economically expands the machining capacity of existing equipment.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tool tooling technology, specifically to a multi-point support device for overtravel machining. Background Technology

[0002] CNC vertical lathes are core equipment for machining large disc, ring, and shell parts. Their maximum machining diameter is strictly limited by the table size and machine tool structure. In actual production, it is often necessary to machine "overtravel" parts with diameters exceeding the table's range, such as machining a φ2300mm housing on a CK5225E (table diameter φ2250mm). In this case, part of the part is suspended in mid-air and cannot be effectively clamped or supported.

[0003] Currently, the industry mainly has two solutions: one is to purchase larger equipment, but this method is costly, time-consuming, and extremely uneconomical; the other is to design dedicated enlarged tooling for specific parts. Although this method can be used as an emergency measure, it has inherent defects such as long design and manufacturing cycles, high costs, and extremely poor versatility. Each time a part is replaced, a new set of tooling needs to be designed and manufactured, which cannot meet the flexible production needs of multiple varieties and small batches.

[0004] More importantly, existing technical solutions have significant functional and structural deficiencies in addressing the core issue of "support": Lack of effective radial adjustment and locking mechanism: For overtravel parts, simple shims cannot flexibly adjust the support point position in the radial direction to adapt to parts of different diameters, and there is a lack of reliable locking structure to resist cutting forces, resulting in insufficient support rigidity and easy vibration during machining.

[0005] Insufficient support stability and overall rigidity: Traditional support methods often involve simple placement or single-point locking between the support base and the worktable, resulting in poor connection rigidity. When machining large, thin-walled parts, cutting forces can easily cause micro-displacement of the support unit and tool deflection deformation of the parts, leading to loss of part accuracy and deterioration of surface quality.

[0006] Therefore, there is an urgent need in this field for a solution that not only expands the machining range of CNC vertical lathes, but more importantly, addresses the challenges of stability, versatility, and efficiency in the aforementioned support process. This invention aims to provide a modular multi-point support solution that, through its unique structural design, fundamentally overcomes the shortcomings of existing technologies. Utility Model Content

[0007] The purpose of this utility model is to overcome the aforementioned technical difficulties and provide a multi-point support device that combines high rigidity and high versatility, and is convenient for adjusting overtravel processing.

[0008] To achieve the above objectives, the technical solution adopted is: a multi-point support device for over-range machining, comprising a worktable and a positioning body disposed on the worktable, including: A clamping mechanism used to clamp parts; The positioning body is equipped with a guide mechanism and a first locking mechanism that are connected to the workbench; The positioning body has a radially extending elongated hole; A support mechanism extends through the elongated hole. The support mechanism includes a support base, a height adjustment component disposed on the support base, and a support head for contacting the parts. The support base is locked to the workbench, and a second locking mechanism is provided between the support base and the inner wall of the elongated hole; The positioning body has multiple mounting holes on the side of the elongated hole, and the clamping mechanism can be selectively installed in different mounting holes.

[0009] Furthermore, multiple pairs of positioning grooves are provided radially spaced on the inner walls of both sides of the elongated hole; guide protrusions that are adapted to the positioning grooves are provided on both sides of the support base.

[0010] Furthermore, the locking connection between the support base and the worktable is achieved by a locking screw, which passes through the elongated holes of the support base and the positioning body in sequence and is then fixed to the worktable.

[0011] Furthermore, the positioning body has a locking hole on the side of the elongated hole, and the first locking mechanism is a locking bolt located between the workbench and the locking hole of the positioning body.

[0012] Furthermore, the second locking mechanism includes: A pair of rotating shafts are symmetrically and rotatably mounted on the positioning body and located on both sides of the elongated hole; A pair of worm gears are respectively fixedly installed at one end of the two rotating shafts located inside the positioning body; A pair of transmission rods, the axis of which is parallel to the rotating shaft; the outer end of the transmission rod is provided with an external thread that mates with the threaded hole on the positioning body, forming a threaded transmission pair; the inner end of the transmission rod is provided with a top block, and the outer end of the transmission rod is fixedly fitted with a turbine that meshes with the worm gear.

[0013] Furthermore, the side wall of the support base is provided with a recess or anti-slip texture at a position corresponding to the end of the locking bolt.

[0014] Furthermore, the height adjustment component is a lead screw structure, and the support head is located at the top of the lead screw structure.

[0015] The beneficial effects of adopting the above solution are as follows: This multi-point support device for overtravel machining successfully solves the problem of machining parts exceeding the diameter of the worktable (such as φ2300mm housings) on standard equipment such as the CK5225E. With this device, enterprises do not need to invest huge sums of money to purchase new large CNC vertical lathes, and also avoid the high cost and long cycle of designing and manufacturing special tooling for single parts. It expands the processing capacity of existing equipment at extremely low cost, resulting in significant economic benefits.

[0016] By adjusting the radial movement of the support mechanism within the elongated hole of the positioning body, and by flexibly selecting multiple mounting holes on the side for the clamping mechanism, a modular solution is formed. This device can be quickly adjusted and installed according to the part diameter and equipment model, achieving "one device, multiple applications," with extremely high versatility, perfectly adapting to the modern production mode of multiple varieties and small batches.

[0017] High overall rigidity: The support base is directly fixed to the worktable through the locking screw, which creates a rigid force flow path from the workpiece to the machine tool body, fundamentally improving the stability of the support.

[0018] The combination of the guide convex strip and multiple pairs of positioning grooves enables rapid, stepped adjustment of the radial position of the support base and mechanical self-locking, effectively preventing slippage during processing.

[0019] The second locking mechanism uses a worm gear drive, which synchronously drives the top blocks on both sides to clamp the support seat by rotating a single shaft. This is labor-saving and has a reverse self-locking characteristic, ensuring reliable anti-loosening. The combined effect of these three locking mechanisms can effectively suppress the vibration and deformation of the workpiece, especially large thin-walled ring parts, during processing, thus ensuring processing accuracy and surface quality.

[0020] The height adjustment component of the support mechanism employs a precision lead screw structure, enabling micron-level accurate adjustment of the support height to ensure ideal contact between each support point and the workpiece surface. The entire adjustment and locking process of the device is designed to be simple and intuitive, significantly improving clamping efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the multi-point support device for over-range machining of this utility model.

[0022] Figure 2 for Figure 1 Top view of the main structure in the center.

[0023] Figure 3 This is a top view of the positioning body in Example 2.

[0024] Figure 4 for Figure 3 Cross-sectional view.

[0025] In the diagram, 1. Positioning body; 2. Height adjustment assembly; 3. Guide mechanism; 4. Locking bolt; 5. Mounting hole; 6. Clamping mechanism; 7. Part; 8. Long slot; 9. Locking hole; 10. Rotary shaft; 11. Turning plate; 12. Positioning groove; 13. Guide ridge; 14. Support base; 15. Top block; 16. Transmission rod; 17. Turbine; 18. Worm gear; 19. Vertical lathe centerline. Detailed Implementation

[0026] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. The described embodiments are merely some, not all, of these embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0027] Example 1 like Figure 1-2 An over-range machining multi-point support device includes a worktable, a positioning body 1 disposed on the worktable, a clamping mechanism 6 for clamping parts 7, and a support mechanism.

[0028] The positioning body 1 is initially positioned with the worktable via the guide mechanism 3 at its bottom. A locking hole 9 is provided on the side of the elongated hole 8 on the positioning body 1. The first locking mechanism is a locking bolt 4, which passes through the locking hole 9 and is screwed into the threaded hole of the worktable, thereby fixing the positioning body 1 to the worktable.

[0029] A radially extending elongated hole 8 is formed on the positioning body 1. A support mechanism passes through the elongated hole 8. The support mechanism includes a support base 14, a height adjustment component 2, and a support head for contacting the part 7. The height adjustment component 2 adopts a lead screw structure, and the support head is located at the top of the lead screw structure. The height of the support head can be precisely adjusted by rotating the lead screw.

[0030] The locking connection between the support base 14 and the worktable is achieved by a locking screw. The locking screw passes through the elongated hole 8 of the support base 14 and the positioning body 1 in sequence, and is then fixed in the threaded hole of the worktable.

[0031] The positioning body 1 has multiple mounting holes 5 on the side of the elongated hole 8. The clamping mechanism 6 is a pressure plate or a pressure rod, which can be selectively installed in different mounting holes 5 to accommodate parts 7 of different sizes and apply clamping force.

[0032] The specific implementation method is as follows: Positioning and fixing the positioning body: First, place the positioning body 1 at a suitable radial position on the worktable through the guide mechanism 3. Use the locking bolt 4 to pass through the locking hole 9 to initially fix the positioning body 1 on the worktable.

[0033] Installation and Adjustment of the Support Mechanism: Insert the support mechanism (including support base 14, height adjustment component 2, and support head) into the elongated hole 8 of the positioning body 1, and move it to a suitable radial position according to the diameter of part 7. Then, use a dedicated locking screw to pass through the support base 14 and the elongated hole 8 in sequence, and screw it into the threaded hole of the worktable to rigidly connect the support base 14, the positioning body 1, and the worktable. Finally, rotate the lead screw of the height adjustment component 2 to precisely adjust the height of the support head so that it is in stable contact with the lower surface of part 7 to be supported.

[0034] Install the clamping mechanism: Based on the size of part 7 and the clamping point requirements, install the clamping mechanism 6 (pressure plate or pressure rod) into the most suitable mounting hole 5.

[0035] Place the part and finally clamp it: Hoist part 7 to the center of the workbench and above the adjusted support head, and lower it into position. Operate the clamping mechanism 6 to clamp part 7 from above.

[0036] Processing Completion and Disassembly: After processing is complete, loosen the clamping mechanism 6 and lift the part 7 away. Then, loosen the support base locking screw and the positioning main body locking bolt 4 in sequence to move or reset the entire device.

[0037] Example 2 Based on Embodiment 1, considering that the support base may experience vibration during operation when supporting the parts, the applicant optimized and specified the second locking mechanism to further improve the stability of the device, providing a linkage scheme that is more convenient to operate and more reliable in locking.

[0038] like Figure 3 and Figure 4 The second locking mechanism in this embodiment includes a pair of rotating shafts 10, a pair of worm gears 18, a pair of turbines 17, and a pair of transmission rods 16.

[0039] A pair of rotating shafts 10 are symmetrically and rotatably mounted on the positioning body 1 and located on both sides of the elongated hole 8. One end of each rotating shaft 10 is provided with a turntable 11 for easy rotation by the operator using tools.

[0040] A pair of worm gears 18 are respectively fixedly installed at one end of the two rotating shafts 10 located inside the positioning body 1.

[0041] A pair of transmission rods 16 have their axes parallel to the rotating shaft 10. The outer ends of the transmission rods 16 are machined with external threads, which mate with threaded holes on the positioning body 1 to form a threaded transmission pair. The inner ends of the transmission rods 16 are provided with top blocks 15 for directly abutting against the sidewall of the support seat 14. A worm gear 17 is also fixedly fitted onto the outer ends of the transmission rods 16; this worm gear 17 meshes with a corresponding worm 18 to form a worm-worm gear pair.

[0042] The specific implementation method is as follows: When it is necessary to lock the support seat 14, the operator uses a tool to synchronously rotate the two rotating shafts 10. The rotating shafts 10 drive the worm gear 18 to rotate, and the worm gear 18 drives the meshing turbine 17 to rotate. The rotation of the turbine 17 drives the transmission rod 16 to rotate. Since the transmission rod 16 is connected to the positioning body 1 through a threaded pair, the rotational motion of the transmission rod 16 is converted into linear motion, driving the top block 15 at its inner end to move in opposite directions, thereby synchronously clamping the support seat 14 from both sides. Because the worm gear turbine pair has a reverse self-locking characteristic, once locked, vibrations during the processing cannot loosen the mechanism, and the locking reliability is extremely high. The loosening process is simply achieved by synchronously rotating the rotating shafts 10 in the opposite direction.

[0043] In addition, to enhance the anti-slip effect of locking, recesses or anti-slip patterns can be pre-processed on the side wall of the support base 14 at the position corresponding to the top block 15, so that the top block 15 can be embedded or engaged, further preventing the support base 14 from moving slightly.

[0044] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

[0045] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-point support device for over-range machining, comprising a worktable and a positioning body (1) disposed on the worktable, characterized in that, include: A clamping mechanism (6) for clamping parts (7); The positioning body (1) is provided with a guide mechanism (3) and a first locking mechanism connected to the workbench; The positioning body (1) has a radially extending elongated hole (8). A support mechanism passes through the elongated hole (8). The support mechanism includes a support base (14), a height adjustment component (2) disposed on the support base (14), and a support head for contacting the part (7). The support base (14) is locked to the workbench, and a second locking mechanism is provided between the support base (14) and the inner wall of the elongated hole (8); The positioning body (1) has multiple mounting holes (5) on the side of the elongated hole (8), and the clamping mechanism (6) can be selectively installed in different mounting holes (5).

2. The multi-point support device for over-travel machining according to claim 1, characterized in that: On the inner walls of both sides of the elongated hole (8), multiple pairs of positioning grooves (12) are provided at radial intervals; on both sides of the support base (14), guide protrusions (13) are provided that are adapted to the positioning grooves (12).

3. The multi-point support device for overtravel machining according to claim 1, characterized in that: The locking connection between the support base (14) and the worktable is achieved by a locking screw, which passes through the elongated hole (8) of the support base (14) and the positioning body (1) in sequence and is then fixed to the worktable.

4. The multi-point support device for overtravel machining according to claim 1, characterized in that: The positioning body (1) has a locking hole (9) on the side of the elongated hole (8), and the first locking mechanism is a locking bolt (4) located between the workbench and the locking hole (9) of the positioning body (1).

5. The multi-point support device for overtravel machining according to claim 1, characterized in that: The second locking mechanism includes: A pair of rotating shafts (10) are symmetrically and rotatably mounted on the positioning body (1) and located on both sides of the elongated hole (8); A pair of worm gears (18) are respectively fixedly installed at one end of the two rotating shafts (10) located inside the positioning body (1); A pair of transmission rods (16) with their axes parallel to the rotating shaft (10); the outer end of the transmission rod (16) is provided with an external thread that matches the threaded hole on the positioning body (1) to form a threaded transmission pair; the inner end of the transmission rod (16) is provided with a top block (15), and the outer end of the transmission rod (16) is fixedly fitted with a turbine (17) that meshes with the worm (18).

6. The multi-point support device for overtravel machining according to claim 3, characterized in that: The side wall of the support base (14) is provided with a pit or anti-slip texture at the position corresponding to the end of the locking bolt (4).

7. The multi-point support device for overtravel machining according to claim 1, characterized in that: The height adjustment component (2) is a lead screw structure, and the support head is located at the top of the lead screw structure.

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