Grinding tool for machining deep holes using a lathe

Abstract

The utility model relates to the technical field of grinding equipment, concretely is a grinding tool that utilizes lathe processing deep hole. Including hollow first section rod and second section rod, first axle, second axle, grinding wheel, power input wheel and cutter rest fixture, first section rod and second section rod coaxial connection, its both ends are respectively fixed with flange, and the inboard of flange is installed with bearing seat, and bearing seat is equipped with bearing in, is used for rotating support first axle and second axle, first axle, second axle coaxial connection, its both ends extend to flange outboard respectively, grinding wheel is installed in first axle end, and power input wheel is installed in second axle end, and motor power is transmitted to grinding wheel in proper order through power input wheel, second axle, first axle, drives grinding wheel to rotate, cutter rest fixture is fixed in second section rod outer wall, is used for grinding tool installation to lathe tool rest. Can adapt to ordinary horizontal lathe, realizes deep hole grinding function, thereby significantly improves equipment utilization, reduces enterprise processing cost.

Description

Technical Field

[0001] This utility model relates to the field of abrasive equipment technology, specifically to an abrasive tool for machining deep holes using a lathe. Background Technology

[0002] In the field of machining, deep hole grinding is a high-precision machining process, typically used to finely grind the inner walls of drilled or bored holes to improve surface finish, roundness, and dimensional accuracy. Traditional deep hole grinding usually relies on specialized deep hole grinding machines, which are complex in structure, expensive, and only suitable for specific machining scenarios, resulting in high equipment investment costs and low utilization rates for small and medium-sized enterprises.

[0003] The existing technology has at least the following defects and shortcomings: (1) Strong dependence on special equipment: Traditional deep hole grinding requires the use of special grinding machines, and ordinary lathes cannot be directly used for internal hole grinding, resulting in low equipment utilization. (2) Complex structure and difficult adjustment: Most existing deep hole grinding tools adopt an integral long shaft structure, which has poor rigidity and is difficult to adapt to the processing requirements of deep holes of different lengths. (3) Low power transmission efficiency: Some grinding tools use an external motor to directly drive the grinding wheel, resulting in a bulky structure and difficulty in stable installation on a lathe. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a grinding tool for machining deep holes using a lathe. It can be adapted to a regular horizontal lathe and installed using the existing tool post of the lathe to realize the deep hole grinding function, thereby significantly improving the equipment utilization rate and reducing the processing cost of enterprises.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A grinding wheel for machining deep holes on a lathe includes a hollow first and second rod section, a first shaft, a second shaft, a grinding wheel, a power input wheel, and a tool holder fixture. The first and second rod sections are coaxially connected, with flanges fixed to both ends. Bearing seats are installed inside the flanges, and bearings are installed inside the bearing seats for rotatably supporting the first and second shafts. The first and second shafts are coaxially connected, with both ends extending to the outside of the flanges. The grinding wheel is installed at the end of the first shaft, and the power input wheel is installed at the end of the second shaft. Motor power is transmitted sequentially through the power input wheel, the second shaft, and the first shaft to the grinding wheel, driving the grinding wheel to rotate. The tool holder fixture is fixed to the outer wall of the second rod section for mounting the grinding wheel to the lathe tool post.

[0007] Furthermore, the first and second rod sections are detachably connected.

[0008] Furthermore, the first and second rod sections are detachably connected via splines.

[0009] Furthermore, the flange includes a first flange and a second flange, with the first flange installed at the extended ends of the first and second shafts, and the second flange installed at the connecting end of the first and second shafts.

[0010] Furthermore, the first flange is connected to the first and second rod sections by bolts.

[0011] Furthermore, the second flange is coaxially connected to the first and second rod sections through a protrusion and groove insertion fit, wherein the cross-section of the protrusion and groove is polygonal.

[0012] Furthermore, the first axis and the second axis are coaxially connected by a key.

[0013] Furthermore, the bearing is a deep groove ball bearing.

[0014] Furthermore, the power input wheel is a pulley, which is connected to the motor output shaft via a transmission belt. The transmission belt and the pulley groove form a frictional transmission or meshing transmission.

[0015] Furthermore, the pulley is a belt pulley, and the transmission belt is a V-belt.

[0016] Compared with the prior art, the present invention has at least the following technical effects or advantages:

[0017] 1. This utility model directly fixes the tool holder onto the lathe tool post using a tool holder fixture, eliminating the need for a dedicated grinding machine and enabling ordinary horizontal lathes to perform deep hole grinding. It adopts a split rod design (first section rod and second section rod), allowing for flexible length adjustment according to the machining depth, thus improving applicability. Power is received from the lathe motor or an external motor via a power input wheel (such as a pulley), driving the grinding wheel to rotate through the coaxially connected first and second axes, ensuring stable grinding. This utility model is particularly suitable for small- to medium-batch deep hole machining scenarios, such as precision internal hole grinding of hydraulic cylinder barrels, gun barrels, and oil drill pipes, significantly reducing equipment investment costs and improving the machining flexibility of existing lathes.

[0018] 2. The first and second sections of this utility model are detachably connected, allowing users to flexibly assemble or disassemble the rods according to the required machining depth, adapting to deep hole grinding tasks of different lengths and improving the equipment's versatility. If a section of the rod is worn or damaged, it can be replaced individually, reducing operating costs.

[0019] 3. The first and second sections of the rod are detachably connected by a spline. The spline connection ensures the coaxiality of the two sections, avoiding vibration or machining errors caused by eccentricity during grinding. The spline structure can effectively transmit rotational power and prevent slippage at the connection, making it suitable for high-load grinding conditions.

[0020] 4. This utility model flange includes a first flange and a second flange. The first flange is installed at the extended ends of the first and second shafts, and the second flange is installed at the connecting end of the first and second shafts. It provides dual support for stability: the first flange supports the grinding wheel and the power input wheel end, while the second flange reinforces the shaft connection, reducing cantilever deformation of the long shaft and improving overall rigidity. It also facilitates assembly: the split flange design simplifies bearing installation and shaft adjustment.

[0021] 5. The first flange of this utility model is connected to the first and second rod sections by bolts; it is detachable for maintenance: the bolt connection facilitates the disassembly of the flange for bearing replacement or lubrication, extending its service life. The connection is secure: the bolt preload prevents the flange from loosening, ensuring stability under high-speed rotation.

[0022] 6. In this utility model, the second flange is coaxially connected to the first and second rod sections via a protrusion and groove insertion fit. The cross-section of the protrusion and groove is polygonal. Quick positioning: The polygonal protrusion and groove (e.g., quadrilateral) provide circumferential anti-rotation, eliminating the need for an additional keyway and simplifying the assembly process. Strong torsional resistance: The polygonal structure is more resistant to torque than a circular cross-section, preventing relative rotation at the connection point.

[0023] 7. The first and second shafts of this utility model are coaxially connected by a key, resulting in efficient power transmission: The key connection (such as a flat key or spline) ensures synchronous rotation of the two shafts without slippage, making it suitable for high-precision grinding. Compact structure: Compared to couplings, key connections occupy less space, making them suitable for the limited installation environment of lathe tool post. The compact structure saves space, has strong torque bearing capacity, and the standardized design facilitates disassembly and maintenance.

[0024] 8. The power input wheel of this utility model is a pulley, which is connected to the motor output shaft via a V-belt. The V-belt and the pulley groove form a friction transmission. The transmission structure is simple and reliable, easy to install and maintain, economical and practical, and highly adaptable to various environments. This transmission method is particularly suitable for the deep hole grinding modification of small and medium-sized lathes, ensuring reliable power transmission while also considering economy and ease of maintenance. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0026] Figure 2 This is a schematic cross-sectional view of the structure of this utility model.

[0027] Figure 3 This is a three-dimensional structural diagram of the first section of the rod of this utility model.

[0028] Figure 4 This is a three-dimensional structural diagram of the second section of the rod of this utility model.

[0029] Figure 5 This is a three-dimensional structural diagram of the first flange of this utility model.

[0030] Figure 6 This is a three-dimensional structural diagram of the second flange of this utility model.

[0031] Figure 7 This is a three-dimensional structural diagram of the first axis of this utility model.

[0032] Figure 8 This is a three-dimensional structural diagram of the second axis of this utility model.

[0033] In the diagram: 1. First rod section; 2. Second rod section; 3. First shaft; 4. Second shaft; 5. Grinding wheel; 6. Pulley; 7. First flange; 8. Second flange; 9. Tool holder fixture; 10. Bearing; 71. Bolt hole; 72. Cylindrical mounting hole; 81. Rectangular boss. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. 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 embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0035] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] In the description of this utility model, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0038] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0039] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0040] like Figure 1-7 As shown, a grinding tool for machining deep holes using a lathe includes a first rod 1, a second rod 2, a first shaft 3, a second shaft 4, a grinding wheel 5, a pulley 6, a first flange 7, a second flange 8, and a tool holder fixture 9.

[0041] The first rod section 1 is cylindrical, with a threaded hole at its left end corresponding to the first flange 7. The first flange 7 is bolted to the left end of the first rod section 1 and is coaxially connected to the first rod section 1. The right end of the first rod section 1 has a rectangular groove corresponding to the rectangular boss 81 of the second flange 8. The second flange 8 and the first rod section 1 are coaxially connected through the insertion and mating of the boss and the groove.

[0042] The second rod section 2 is cylindrical, with a threaded hole at its right end corresponding to the first flange 7. The first flange 7 is bolted to the right end of the first rod section 1 and coaxially connected to the second rod section 2. The left end of the second rod section 2 has a rectangular groove corresponding to the rectangular boss of the second flange 8. The second flange 8 and the second rod section 1 are coaxially connected through the insertion and mating of the boss and the groove.

[0043] The right end of the first section 1 and the left end of the second section 2 are detachably connected by a spline and are coaxially connected.

[0044] The first flange 7 has bolt holes 71 evenly distributed around its circumference, and has cylindrical mounting holes 72 inside that match the outer ring of the bearing. The bearing 10 is installed in the cylindrical mounting holes 72, and the bearing 10 is a deep groove ball bearing. The axis of the cylindrical mounting holes 72 is not the same as the axis of the first flange 7, and the two are parallel to each other. In this embodiment, the two are 30mm apart.

[0045] The second flange 8 has two symmetrical rectangular bosses 81 along its edge, and a cylindrical mounting hole 72 inside that matches the outer ring of the bearing. The bearing 10 is installed in the cylindrical mounting hole 72, and the bearing 10 is a deep groove ball bearing. The axis of the cylindrical mounting hole 72 is not the same as the axis of the second flange 8; they are parallel to each other, and in this embodiment, they are 30mm apart.

[0046] The first shaft 3 has a keyway on its right end and an external thread corresponding to the round nut on its left end. The left end of the first shaft 3 is mounted on the bearing of the first flange 7 on the left end of the first section rod 1, and the right end of the first shaft 3 is mounted on the bearing of the second flange 8 on the right end of the first section rod 1. The left end of the first shaft 3 extends out of the first flange 7, and the grinding wheel 5 is mounted on the left end of the first shaft 3 via a round nut.

[0047] The left end of the second shaft 4 has a keyway, and the right end of the first shaft 3 is connected to the left end of the second shaft 4 by a key. The pulley 6 is installed on the right end of the second shaft 4, and the pulley 6 is connected to the motor output shaft through a V-belt. The V-belt and the groove of the pulley 6 form a friction drive.

[0048] The tool holder 9 is fixed to the outer wall of the second section rod 2. This utility model is directly fixed to the tool post of the horizontal lathe by the tool holder 9. The motor power is transmitted to the grinding wheel 5 in sequence through the pulley 6, the second shaft 4, and the first shaft 3, driving the grinding wheel 5 to rotate and grind the inner surface of the deep hole.

[0049] This invention allows for direct mounting on the horizontal lathe tool post using a tool holder 9, eliminating the need for a dedicated grinding machine and enabling ordinary horizontal lathes to perform deep hole grinding. The split-type rod design (first section 1, second section 2) allows for flexible length adjustment based on machining depth, improving versatility. Power is received from the lathe motor or an external motor via a power input wheel (e.g., pulley 6), driving the grinding wheel 5 to rotate through coaxially connected first and second shafts 3 and 4, ensuring stable grinding. This invention is particularly suitable for small- to medium-batch deep hole machining applications, such as precision internal hole grinding of hydraulic cylinder barrels, gun barrels, and oil drill pipes, significantly reducing equipment investment costs and improving the machining flexibility of existing lathes.

[0050] The first section 1 and the second section 2 of this utility model are detachably connected, allowing users to flexibly assemble or disassemble the rods according to the required machining depth, adapting to deep hole grinding tasks of different lengths and improving the versatility of the equipment. If a section of the rod is worn or damaged, it can be replaced individually, reducing operating costs.

[0051] The first rod section 1 and the second rod section 2 of this invention are detachably connected by a spline. The spline connection ensures the coaxiality of the two rod sections, avoiding vibration or machining errors caused by eccentricity during grinding. The spline structure can effectively transmit rotational power and prevent slippage at the connection, making it suitable for high-load grinding conditions.

[0052] This utility model flange includes a first flange 7 and a second flange 8. The first flange 7 is installed at the extended ends of the first shaft 3 and the second shaft 4, and the second flange 8 is installed at the connecting end of the first shaft 3 and the second shaft 4. It provides dual support for stability: the first flange 7 supports the grinding wheel 5 and the power input wheel end, while the second flange 8 reinforces the shaft connection, reducing cantilever deformation of the long shaft and improving overall rigidity. It also facilitates assembly: the split flange design simplifies bearing installation and shaft adjustment.

[0053] The first flange 7 of this utility model is connected to the first rod 1 and the second rod 2 by bolts; it is detachable for maintenance: the bolt connection facilitates the disassembly of the flange to replace bearings or lubricate, extending its service life. The connection is secure: the bolt preload prevents the flange from loosening, ensuring stability under high-speed rotation.

[0054] The second flange 8 of this utility model is coaxially connected to the first rod 1 and the second rod 2 through the insertion and engagement of a rectangular boss 81 and a rectangular groove, enabling rapid positioning: the polygonal protrusion and groove (such as a quadrilateral) provide circumferential anti-rotation, eliminating the need for an additional keyway and simplifying the assembly process. It also boasts strong torsional resistance: the polygonal structure is more resistant to torque than a circular cross-section, preventing relative rotation at the connection point.

[0055] In this invention, the first shaft 3 and the second shaft 4 are coaxially connected by a key, resulting in efficient power transmission. The key connection (such as a flat key or spline) ensures synchronous rotation of the two shafts without slippage, making it suitable for high-precision grinding. The structure is compact: compared to couplings, key connections occupy less space, making them suitable for the limited installation environment of lathe tool post. The compact structure saves space, has strong torque bearing capacity, and the standardized design facilitates disassembly and maintenance.

[0056] The power input wheel of this invention is a pulley 6, which is connected to the motor output shaft via a V-belt. The V-belt and the pulley groove form a friction transmission. The transmission structure is simple and reliable, easy to install and maintain, economical and practical, and highly adaptable to various environments. This transmission method is particularly suitable for the deep hole grinding modification of small and medium-sized lathes, ensuring reliable power transmission while also considering economy and ease of maintenance.

[0057] This utility model can be adapted to ordinary horizontal lathes and installed using the existing tool post of the lathe to realize deep hole grinding function, thereby significantly improving equipment utilization and reducing enterprise processing costs.

[0058] The scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A grinding tool for machining deep holes using a lathe, characterized in that: It includes a hollow first and second rod section, a first shaft, a second shaft, a grinding wheel, a power input wheel, and a tool holder fixture; The first and second rod sections are coaxially connected, and flanges are fixed to both ends of each section. Bearing seats are installed inside the flanges, and bearings are installed inside the bearing seats to rotate and support the first and second shafts. The first shaft and the second shaft are coaxially connected, with their two ends extending to the outside of the flange, respectively. The grinding wheel is mounted on the end of the first shaft, and the power input wheel is mounted on the end of the second shaft. The motor power is transmitted to the grinding wheel in sequence through the power input wheel, the second shaft, and the first shaft, driving the grinding wheel to rotate. The tool holder fixture is fixed to the outer wall of the second section of the rod and is used to mount the grinding wheel to the lathe tool post.

2. The abrasive for machining deep holes using a lathe according to claim 1, characterized in that: The first and second rod sections are detachably connected.

3. The abrasive tool for machining deep holes using a lathe according to claim 2, characterized in that: The first and second rod sections are detachably connected via splines.

4. The abrasive tool for machining deep holes using a lathe according to claim 1, characterized in that: The flange includes a first flange and a second flange. The first flange is installed at the protruding ends of the first shaft and the second shaft, and the second flange is installed at the connecting end of the first shaft and the second shaft.

5. The abrasive for machining deep holes using a lathe according to claim 4, characterized in that: The first flange is connected to the first and second rod sections by bolts.

6. The abrasive tool for machining deep holes using a lathe according to claim 4, characterized in that: The second flange is coaxially connected to the first and second rod sections through a protrusion and groove insertion fit, wherein the cross-section of the protrusion and groove is polygonal.

7. The abrasive tool for machining deep holes using a lathe according to claim 1, characterized in that: The first axis and the second axis are coaxially connected by a key.

8. The abrasive tool for machining deep holes using a lathe according to claim 1, characterized in that: The bearing is a deep groove ball bearing.

9. A grinding tool for machining deep holes using a lathe according to claim 1, characterized in that: The power input wheel is a pulley, which is connected to the motor output shaft via a transmission belt. The transmission belt and the pulley groove form a frictional transmission or meshing transmission.

10. A grinding tool for machining deep holes using a lathe according to claim 9, characterized in that: The pulley is a belt pulley, and the transmission belt is a V-belt.

Images