Knife rest structure of numerical control heavy horizontal turning and grinding machine

Abstract

The invention discloses a numerical control heavy horizontal turning and grinding machine tool sharpening frame structure which comprises a large tool rest, an upper tool rest, a transverse feeding mechanism, a linear hard rail, a sliding guide rail, a worm, a worm gear and a transition body, and the upper tool rest comprises an upper tool rest lower body, a rotary body and a static pressure grinding head; the large tool rest is installed on a lathe bed of the numerical control heavy horizontal turning and grinding machine, and the upper tool rest lower body is installed in the large tool rest. The rotary body is fixed above the upper knife rest lower body through a clamping screw, and the static pressure grinding head is mounted at the top of the rotary body; the transition body is connected below the rotary body, the worm gear is installed on the transition body, and the worm is longitudinally arranged on the upper tool rest lower body and meshed with the worm gear. Through composite arrangement of the linear hard rails and the multiple sets of sliding guide rails, combination of high-rigidity bearing and high-precision guiding is achieved, a stable foundation is provided for micro-feeding, main vertical loads are borne through rolling of the pulleys on the wheel type steel rails, and moving resistance is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and in particular to a grinding head structure for a CNC heavy-duty horizontal lathe grinding machine. Background Technology

[0002] In heavy-duty precision machining, the tool post system of a CNC horizontal turning and grinding machine is a key component for achieving high-precision machining. Traditional tool post guideways often employ a single type of hardened or sliding guideway. When machining heavy workpieces, these systems often suffer from insufficient micro-feed accuracy, limited vibration resistance, and decreased guiding stability due to wear or thermal deformation after long-term use. Especially during high-precision grinding, the rigidity, damping characteristics, and adaptability to deformation of the guideway system directly affect the surface quality and shape accuracy. Therefore, there is an urgent need for a guideway system that can balance high rigidity, high damping, high-precision feed, and possess a certain degree of adaptive compensation capability to improve the overall machining performance and reliability of heavy-duty turning and grinding machines. Summary of the Invention

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0004] To address the aforementioned problems, the present invention provides the following technical solution: A grinding post structure for a CNC heavy-duty horizontal lathe grinding machine includes a large tool post, an upper tool post, a transverse feed mechanism, a linear hardened rail, a sliding guide rail, a worm gear, a worm wheel, and a transition body; The upper tool post includes an upper tool post lower body, a rotating body, and a hydrostatic grinding head; The large tool post is mounted on the bed of the CNC heavy-duty horizontal lathe and grinder, and the lower body of the upper tool post is mounted inside the large tool post; The rotating body is fixed to the upper part of the lower body of the upper tool holder by clamping screws, and the hydrostatic grinding head is installed on the top of the rotating body; The transition body is connected to the lower part of the rotating body, the worm gear is mounted on the transition body, and the worm is arranged longitudinally on the lower part of the upper tool post and meshes with the worm gear.

[0005] As a preferred embodiment of the grinding post structure of the CNC heavy-duty horizontal lathe grinding machine described in this invention, wherein: multiple sets of longitudinally arranged sliding guide rails are provided in the grooves on both sides of the large tool post, and the corresponding connecting surfaces of the lower body of the upper tool post match each sliding guide rail; The transverse feed mechanism is located between the two slots of the large tool holder, and a longitudinal straight hard rail is fixed in the middle of the bottom plane of each slot on both sides. The linear hard rail and the sliding guide rail together form a composite guide rail structure.

[0006] As a preferred embodiment of the grinding head structure of the CNC heavy-duty horizontal lathe grinding machine described in this invention, each set of sliding guide rails includes multiple sliding guide rails located on the bottom plane, top plane and one side vertical plane of the groove, and the two sets of sliding guide rails are arranged symmetrically.

[0007] As a preferred embodiment of the grinding post structure of the CNC heavy-duty horizontal lathe grinding machine described in this invention, the lower body of the upper tool post is provided with a lower protrusion at the contact end with the linear hard rail, and pulleys are provided at both ends of the upper tool post. The outer surface of the pulleys is provided with rubber sleeves. The linear hard rail is provided with a central slot at the top of the upper tool post, and an expansion rubber sleeve is provided in the central slot.

[0008] As a preferred embodiment of the grinding post structure of the CNC heavy-duty horizontal lathe grinding machine described in this invention, the bottom of the linear hard rail is provided with a wheeled steel rail, the pulley is rolled on the wheeled steel rail, the force-bearing surface of the lower body of the upper tool post is slidably connected to the linear hard rail, and one end of the lower protrusion is engaged with the air storage part of the expansion rubber sleeve.

[0009] As a preferred embodiment of the grinding head structure of the CNC heavy-duty horizontal lathe grinding machine described in this invention, the expanding rubber sleeve includes an air storage part, an outer surface layer, an inner surface layer, an inner convex surface layer, and an inner partition layer. The outer surface layer is fixed in the middle slot, and an inner partition layer is sandwiched between the outer surface layer and the inner surface layer. The inner partition layer has an opening, and the surface of the inner surface layer has equally spaced inner convex surface layers. The inner convex surface layers cooperate with the concave groove of the lower protrusion. The air storage part is connected to the outer surface layer and the inner surface layer.

[0010] As a preferred embodiment of the grinding post structure of the CNC heavy-duty horizontal lathe grinding machine described in this invention, a set of double protective layers is provided on each of the left and right sides of the lower body of the upper tool post.

[0011] As a preferred embodiment of the grinding head structure of the CNC heavy-duty horizontal lathe grinding machine described in this invention, the rotating body is a manually operated rotating layer used to drive the hydrostatic grinding head to adjust its angle.

[0012] As a preferred embodiment of the grinding head structure of the CNC heavy-duty horizontal lathe grinding machine described in this invention, the hydrostatic grinding head is a hydrostatic electric spindle grinding head.

[0013] The beneficial effects of this invention are: by combining the linear hard rails and multiple sets of sliding guide rails, a combination of high rigidity bearing and high precision guidance is achieved, providing a stable foundation for micro-feeding; and by having the pulleys roll on the wheeled steel rails to bear the main vertical load, the moving resistance is greatly reduced. The sliding fit between the force-bearing surface and the side of the hardened rail ensures lateral accuracy, combining efficiency and precision. When the tool post is subjected to impact or vibration, the lower convex block compresses or stretches the inner convex surface in the concave groove, causing changes in the air pressure within the air storage compartment. This is adjusted through the openings in the inner partition, thereby achieving dynamic damping to absorb vibration. Simultaneously, this structure can adapt to minor deformations caused by temperature or load, maintaining pre-tight contact and preventing gaps. Both the outer rubber sleeve and the expansion rubber sleeve provide elastic cushioning, protecting the metal contact surfaces. The L-shaped double protective layers on both sides of the lower body of the upper tool post effectively isolate impurities, ensuring the cleanliness and lasting precision of the entire slide rail system. This improved slide rail system is seamlessly integrated with the original rotation and grinding function modules of the tool post, supporting complex contour machining while ensuring high-precision feed and vibration resistance, achieving high-quality turning and grinding composite machining of heavy workpieces in a single setup. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a perspective view of the entire embodiment.

[0015] Figure 2 This is a perspective view of the tool holder and linear hard rail in this embodiment.

[0016] Figure 3 This is a perspective view of the expansion rubber sleeve in this embodiment.

[0017] Figure 4 This is a perspective view of the expansion rubber sleeve and lower protrusion in this embodiment.

[0018] Figure 5 This is an exploded perspective view of the inflatable rubber sleeve in this embodiment.

[0019] In the diagram: 1. Upper tool post; 2. Lower body of upper tool post; 3. Rotary body; 4. Hydrostatic grinding head; 5. Transverse feed mechanism; 6. Linear hardened rail; 7. Sliding guide rail; 8. 9. Worm; 10. Worm wheel; 11. Transition body; 12. Lower protrusion; 22. Concave groove; 221. Force-bearing surface; 23. Pulley; 24. The components include: a central slot 71, an expansion rubber sleeve 72, an air storage section 72a, an outer surface layer 721, an inner surface layer 722, an inner convex surface layer 7221, an inner partition layer 723, an opening 7231, and a wheeled rail 73. Detailed Implementation

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0022] Secondly, the term "one 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 is mutually exclusive with other embodiments.

[0023] Reference Figures 1 to 5 This embodiment of the invention provides a grinding turret structure for a CNC heavy-duty horizontal lathe grinding machine. The large tool turret 1 is fixed to the transverse sliding slide of the machine bed via its bottom mounting surface. The large tool turret 1 has two symmetrical longitudinal slots inside. In each slot, sliding guide rails 8 (e.g., plastic-coated guide rails or steel-inlaid guide rails) are installed on the bottom plane, top plane, and inner vertical surface, forming multi-faceted constraints on the embedded upper tool turret lower body 3, ensuring the straightness of its longitudinal movement and its anti-overturning capability.

[0024] A transverse feed mechanism 6 (such as a ball screw and nut pair driven by a servo motor) is installed on the partition between the two large tool holder slots. Its nut is connected to the lower body 3 of the upper tool holder, driving the entire upper tool holder 2 to perform longitudinal feed. A high-precision linear hard rail 7 is fixedly installed in the center of the bottom surface of each slot by bolts.

[0025] The key to implementing the improved sliding rail connection structure lies in the interface between the linear hard rail 7 and the lower body 3 of the upper tool holder. A central slot 71 is machined along the length of the top of the linear hard rail 7. An expansion rubber sleeve 72 is embedded in and bonded to the central slot 71. This expansion rubber sleeve 72 is made of a highly elastic rubber material, and its internal structure is as follows: Figure 4-5 As shown: the outer layer is an outer surface layer 721 bonded to the slot 71, and the inner layer is an inner surface layer 722 in contact with the lower protrusion 22. The two are connected by an inner partition layer 723 with an opening 7231, together forming a gas storage section 72a. The inner surface of the inner surface layer 722 is molded with multiple equidistant annularly arranged inner convex surface layers 7221.

[0026] The bottom of the lower body 3 of the upper tool holder corresponds to the position of the linear hard rail 7 and is machined with a downwardly protruding lower protrusion 22. The lower end face of the lower protrusion 22 has an annular recessed groove 221. When the lower body 3 of the upper tool holder is installed in place, the lower protrusion 22 extends into the middle groove 71, and its recessed groove 221 forms an elastic engagement with the inner convex surface layer 7221 of the expansion rubber sleeve 72. This engagement provides a certain preload when there is no load, eliminating gaps; when subjected to vertical load, the inner convex surface layer 7221 undergoes elastic deformation, and the air pressure in the air storage section 72a changes. The airflow is buffered through the opening 7231 of the inner partition layer 723, absorbing vibration and impact.

[0027] On both sides of the bottom of the lower body 3 of the upper tool holder, at both ends of the lower protrusion 22, pulleys 24 are mounted via bearings. The outer ring of the pulleys 24 is fitted with wear-resistant rubber sleeves. At the bottom of the linear hardened rail 7, a hardened wheeled steel rail 73 is fixed with screws. The rubber outer edge of the pulleys 24 rolls in contact with the upper surface of the wheeled steel rail 73, bearing most of the weight of the upper tool holder 2, enabling easy movement. Simultaneously, the force-bearing surfaces 23 on both sides of the lower body 3 of the upper tool holder are precisely scraped to maintain an appropriate sliding fit clearance with the sides of the linear hardened rail 7, providing precise lateral positioning.

[0028] On the outside of the slide rail system, L-shaped double protective layers 9 are installed on the left and right sides of the lower body 3 of the upper tool holder to form a labyrinth seal, preventing chips and coolant from entering the slide rail contact area.

[0029] During operation, the transverse feed mechanism 6 drives the upper tool post 2 to move longitudinally. The main weight is borne by the rolling pair of pulleys 24 and wheel-type steel rails 73, ensuring smooth movement. Lateral forces and overturning moments are borne by the sliding pair composed of the sliding guide rail 8 and the force-bearing surface 23 (the side of the straight hard rail 7), ensuring rigidity. Vibrations and minor impacts during operation are effectively absorbed by the elastic deformation and pneumatic damping effect of the pulley rubber sleeves and expansion rubber sleeves 72, ensuring extreme stability during the grinding process, especially during precision grinding.

[0030] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A CNC heavy-duty horizontal lathe grinder blade grinding frame structure, characterized in that: It comprises a large tool holder (1), an upper tool holder (2), a transverse feeding mechanism (6), a straight linear rail (7), a sliding guide rail (8), a worm (10), a worm wheel (11) and a transition body (12); The upper tool holder (2) comprises an upper tool holder lower body (3), a rotary body (4) and a static pressure grinding head (5); The large tool holder (1) is installed on the bed of a numerical control heavy horizontal lathe grinder, and the upper tool holder lower body (3) is installed inside the large tool holder (1). The rotary body (4) is fixed above the upper tool holder lower body (3) through clamping screws (13), and the static pressure grinding head (5) is installed on the top of the rotary body (4). The transition body (12) is connected below the rotary body (4), the worm wheel (11) is installed on the transition body (12), and the worm (10) is longitudinally arranged on the upper tool holder lower body (3) and engaged with the worm wheel (11).

2. The tool sharpener according to claim 1, wherein: Each of the two side groove bodies of the large tool holder (1) is provided with a plurality of groups of longitudinally arranged sliding guide rails (8), and the corresponding connecting surfaces of the upper tool holder lower body (3) are matched with the sliding guide rails (8); The transverse feeding mechanism (6) is arranged between the two groove bodies of the large tool holder (1), and one longitudinal straight linear rail (7) is fixed in the middle of the bottom plane of each of the two side groove bodies. The straight linear rail (7) and the sliding guide rail (8) jointly form a composite guide rail structure.

3. The CNC heavy duty horizontal carburizing grinder blade grinding frame structure according to claim 1, characterized in that: Each group of the sliding guide rails (8) comprises a plurality of sliding guide rails arranged on the bottom plane, the top plane and one side vertical plane of the groove body, and the two groups of sliding guide rails (8) are symmetrically arranged.

4. The CNC heavy duty horizontal carburizing grinder blade grinding head structure according to claim 1, characterized in that: The contact end of the upper tool holder lower body (3) with the straight linear rail (7) is provided with a lower protrusion (22), and the two ends thereof are provided with pulleys (24), the outer surface of the pulley (24) is provided with a rubber sleeve, the straight linear rail (7) is provided with a middle slot (71) corresponding to the top of the upper tool holder lower body (3), and the middle slot (71) is provided with an expanded rubber sleeve (72).

5. The CNC heavy duty horizontal carburizing grinder blade grinding head structure according to claim 1, characterized in that: The bottom of the straight linear rail (7) is provided with a wheeled rail (73), the pulley (24) is rollingly arranged on the wheeled rail (73), the stress surface (23) of the upper tool holder lower body (3) is in sliding connection with the straight linear rail (7), and one end of the lower protrusion (22) is matched with a gas storage part (72a) of the expanded rubber sleeve (72).

6. The CNC heavy duty horizontal carburizing grinder blade grinding head structure according to claim 1, characterized in that: The expanded rubber sleeve (72) comprises a gas storage part (72a), an outer surface layer (721), an inner surface layer (722), an inner convex surface layer (7221) and an inner separation layer (723), the outer surface layer (721) is fixedly arranged in the middle slot (71), the inner separation layer (723) is arranged between the outer surface layer (721) and the inner surface layer (722), the inner separation layer (723) is provided with an opening (7231), the surface of the inner surface layer (722) is provided with equidistant inner convex surface layers (7221), the inner convex surface layers (7221) are matched with concave matching grooves (221) of the lower protrusion (22), and the gas storage part (72a) is in communication with the outer surface layer (721) and the inner surface layer (722).

7. The CNC heavy duty horizontal carburizing grinder blade grinding head structure according to claim 1, characterized in that: Each of the left and right sides of the upper tool holder lower body (3) is provided with a group of double protective layers (9).

8. The CNC heavy duty horizontal carburizing grinder blade grinding head structure according to claim 1, characterized in that: The rotary body (4) is a manual rotary layer, which is used for driving the static pressure grinding head (5) to adjust the angle.

9. The CNC heavy duty horizontal carburizing grinder blade grinding frame structure according to claim 8, characterized in that: The hydrostatic grinding head (5) is a hydrostatic electric spindle grinding head. The hydrostatic grinding head (5) is a hydrostatic electric spindle grinding head.

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