Machining tool suitable for lathe to grind inner hole

Abstract

The utility model discloses a machining tool suitable for a lathe to grind an inner hole, which comprises a cutter bar body, a dovetail groove is arranged at the front end of the cutter bar body, a grinding component or a polishing component is fixed in the dovetail groove, a pair of positioning screws is screwed on the cutter bar body and positioned above the dovetail groove, and the positioning screws are screwed on the cutter bar body. The utility model relates to the technical field of cylinder sleeve inner hole machining, the machining tool integrates the grinding function and the polishing function into a whole, by replacing the grinding assembly and the polishing assembly, the machining efficiency is improved, the machining cost is reduced, and the machining efficiency is improved. The resin diamond grinding head can be firstly used for efficient grinding, more allowance is removed, then abrasive paper is used for polishing, the surface of the workpiece is smoother, the combined machining mode overcomes the defects of a single machining mode, different roughness requirements can be better met, and it is guaranteed that the workpiece reaches the drawing design standard.

Description

Technical Field

[0001] This utility model relates to the field of cylinder liner inner hole machining technology, specifically a machining tool suitable for grinding inner holes on a lathe. Background Technology

[0002] In the field of compressor manufacturing, different types of compressor cylinder liners have different characteristics and processing requirements. Reciprocating compressor cylinder liners have larger inner bores and lower pressure, and are made of cast iron, requiring a surface roughness of Ra0.8-Ra1.6. Diaphragm compressor cylinder liners have smaller inner bores and higher pressure, and are made of alloy steel, requiring a relatively higher surface roughness of Ra0.2-Ra0.8, and in some cases even Ra0.2-Ra0.4. Currently, manufacturers of medium and large compressors typically use milling machines to ensure the precision of the cylinder liner inner bores. However, large milling machines have significant limitations; they cannot process diaphragm compressor cylinder liners with smaller volumes and inner bores, and it is difficult to guarantee the high surface roughness requirements. Although inner bore rollers can process the inner bores of small cylinder liners, they also have many drawbacks. Inner bore rollers require non-standard customization, have long lead times, require high machine tool precision, and have high maintenance costs. Moreover, due to the variety of cylinder liners, the rolling diameter range of inner bore rollers is relatively fixed, requiring the purchase of multiple rollers, which undoubtedly increases the company's operating costs.

[0003] In addition, existing large-scale grinding mills use high-torque transmission mechanisms to perform reciprocating linear motion at low speeds. Due to the large size of the moving mechanism and the small size of the target part, the range of reciprocating linear motion is limited. At the same time, the resistance is large when the grinding mill stone grinds steel parts, resulting in a high temperature rise, which can easily lead to burns on the working surface. The grinding debris can also easily adhere to the surface of the stone, thereby scratching the surface of the workpiece.

[0004] Therefore, developing a convenient, economical, and reliable new tool to solve the problem of machining the inner bore of small cylinder liners and reduce the operating costs of enterprises has become an urgent problem to be solved in the compressor manufacturing industry. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a machining tool suitable for grinding internal holes on a lathe, solving the problem that the internal holes of existing small cylinder liners are difficult to machine.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a machining tool suitable for grinding internal holes on a lathe, comprising a tool holder body, a dovetail groove at the front end of the tool holder body for fixing a grinding component or a polishing component, a pair of positioning screws screwed onto the tool holder body above the dovetail groove, a clamping screw screwed between the pair of positioning screws and screwed onto the tool holder body, a water inlet at the end of the tool holder body, a water outlet at the front end of the tool holder body above the dovetail groove, and a water channel connecting the water inlet and the water outlet within the tool holder body.

[0007] Preferably, the grinding assembly includes a first fixing frame with a dovetail structure, the first fixing frame having a pair of first positioning holes for the insertion of positioning screws, and a receiving groove on one side of the first fixing frame, wherein a resin diamond grinding head is disposed in the receiving groove.

[0008] Preferably, the polishing assembly includes a second fixing frame with a dovetail structure. The second fixing frame has a pair of second positioning holes for inserting positioning screws and a reserved groove for fixing sandpaper. The sandpaper is attached to one side of the second fixing frame. A fixing sleeve is fitted on the outside of the second fixing frame. Set screws are screwed around the fixing sleeve. The ends of the set screws on the upper and lower sides press the sandpaper into the reserved groove, and the ends of the set screws on the left and right sides press against the outer walls of the second fixing frame.

[0009] Preferably, the front contact surface of the second fixing frame has an arc-shaped structure and is fitted with a rubber pad.

[0010] Preferably, the front end of the tool holder is provided with a process screw hole, and both the process screw hole and the water inlet hole are provided with screw plugs.

[0011] Preferably, the resin diamond grinding head is bonded to the receiving groove with epoxy resin adhesive.

[0012] Beneficial effects

[0013] This utility model provides a machining tool suitable for grinding internal holes on a lathe, which has the following beneficial effects:

[0014] This machining tool integrates grinding and polishing functions. By changing different components (grinding component and polishing component), you can first use a resin diamond grinding head for efficient grinding to remove more excess material, and then use sandpaper to polish it to make the workpiece surface smoother. This combined machining method makes up for the shortcomings of single machining methods, can better meet different roughness requirements, and ensure that the workpiece meets the design standards of the drawings.

[0015] By using the same tool holder body, different processing functions can be achieved simply by changing the grinding or polishing parts at the front. This greatly reduces the number of tools, lowers the company's procurement and management costs, and at the same time improves the versatility and applicability of the tools, making it easier for companies to meet the processing needs of various types of cylinder liners.

[0016] The grinding and polishing components are connected to the tool holder body in a simple way, and are assembled and fixed by dovetail grooves, positioning screws and clamping screws. This design makes assembly and disassembly convenient, and enables quick parts change, which greatly shortens the parts change time and improves production efficiency.

[0017] Resin-bonded diamond grinding heads possess high strength and excellent self-sharpening properties, resulting in high grinding efficiency and slow head wear. During cutting, they generate relatively little heat, effectively reducing the risk of workpiece burn. Furthermore, the tool holder is equipped with a water inlet, outlet, and channel to introduce coolant, which effectively cools the resin-bonded diamond grinding head and the workpiece, ensuring processing at a suitable temperature. This helps reduce workpiece deformation and surface quality issues caused by excessive temperature rise, improving both processing quality and efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention when using the grinding component.

[0019] Figure 2 This is a schematic diagram of the structure of the present invention when using the polishing component.

[0020] Figure 3 This is a side view of the structure of the present invention when using the polishing component.

[0021] Figure 4 This is a front view structural diagram of the present invention when using the polishing component.

[0022] Figure 5 This is a schematic diagram of the structure of this utility model during operation.

[0023] In the diagram: 1. Tool holder body; 2. Dovetail groove; 3. Positioning screw; 4. Clamping screw; 5. Water inlet; 6. Water outlet; 7. First fixing bracket; 8. First positioning hole; 9. Resin diamond grinding head; 10. Second fixing bracket; 11. Second positioning hole; 12. Sandpaper; 13. Reserved groove; 14. Fixing sleeve; 15. Set screw; 16. Rubber pad; 17. Process screw hole; 18. Screw plug. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-2 This utility model provides a technical solution: a machining tool suitable for grinding internal holes on a lathe, including a tool holder body 1, a dovetail groove 2 at the front end of the tool holder body 1, the dovetail groove 2 being used to fix a grinding component or a polishing component, a pair of positioning screws 3 being screwed onto the tool holder body 1 above the dovetail groove 2, a clamping screw 4 being screwed onto the tool holder body 1 between the pair of positioning screws 3, a water inlet hole 5 at the end of the tool holder body 1, a water outlet hole 6 at the front end of the tool holder body 1 above the dovetail groove 2, and a water channel inside the tool holder body 1 for connecting the water inlet hole 5 and the water outlet hole 6.

[0026] By adopting the above technical solution, the dovetail groove 2 at the front end of the tool holder 1 is used to install grinding or polishing components, the positioning screw 3 and the clamping screw 4 are used to fix different components, the tool holder 1 is provided with a water inlet hole 5, a water outlet hole 6 and a water channel, which can introduce coolant for cooling, which helps to improve processing quality and efficiency. The structure of the dovetail groove 2 and the screw fixing method make component replacement convenient and quick, improving the versatility and applicability of the tool.

[0027] In this embodiment, the grinding assembly includes a first fixing frame 7 with a dovetail structure. The first fixing frame 7 has a pair of first positioning holes 8 for the insertion of positioning screws 3. A receiving groove is provided on one side of the first fixing frame 7, and a resin diamond grinding head 9 is provided in the receiving groove.

[0028] By adopting the above technical solution, the first fixing frame 7 of the grinding assembly has a dovetail structure, which cooperates with the dovetail groove 2 of the tool holder body 1. The first positioning hole 8 cooperates with the positioning screw 3 to achieve positioning. The cooperation between the positioning hole and the positioning screw 3 ensures the accurate installation and good straightness of the grinding assembly. The resin diamond grinding head 9 has the advantages of high-efficiency grinding and low heat generation, and can effectively remove the excess material in the inner hole of the workpiece and improve the machining accuracy.

[0029] In this embodiment, the polishing assembly includes a second fixing frame 10 with a dovetail structure. The second fixing frame 10 has a pair of second positioning holes 11 for inserting positioning screws 3. The second fixing frame 10 has a reserved groove 13 for fixing sandpaper 12. The sandpaper 12 is attached to one side of the second fixing frame 10. A fixing sleeve 14 is fitted on the outside of the second fixing frame 10. Set screws 15 are screwed around the fixing sleeve 14. The ends of the set screws 15 on the upper and lower sides press the sandpaper 12 into the reserved groove 13. The ends of the set screws 15 on the left and right sides press against the outer walls of the two sides of the second fixing frame 10.

[0030] By adopting the above technical solution, the second fixing frame 10 of the polishing component has a dovetail structure, which cooperates with the dovetail groove 2 of the tool holder body 1. The second positioning hole 11 cooperates with the positioning screw 3 to achieve positioning. The sandpaper 12 is fixed on the second fixing frame 10 by the fixing sleeve 14 and the set screw 15. The positioning hole and the positioning screw 3 ensure the accurate installation of the polishing component. The fixing method of the sandpaper 12 is simple and reliable, and can polish the surface of the workpiece after grinding, making the workpiece surface smoother and improving the surface quality.

[0031] In this embodiment, the front contact surface of the second fixing frame 10 is an arc-shaped structure, and a rubber pad 16 is attached thereon.

[0032] By adopting the above technical solution, the arc-shaped structure makes the second fixing frame 10 make line contact with the inner hole of the workpiece, which can apply pressure more evenly and improve the polishing effect. The rubber pad 16 plays a buffering role to avoid damage to the surface of the workpiece, and at the same time can improve the adhesion between the sandpaper 12 and the surface of the workpiece, further improving the polishing quality.

[0033] In this embodiment, the front end of the tool holder body 1 is provided with a process screw hole 17, and both the process screw hole 17 and the water inlet hole 5 are provided with screw plugs 18.

[0034] By adopting the above technical solution, the water inlet hole 5 is used to introduce coolant during the processing, and the process screw hole 17 can be used as needed.

[0035] In this embodiment, the resin diamond grinding head 9 is further configured to be bonded to the receiving groove with epoxy resin adhesive.

[0036] By adopting the above technical solution, the epoxy resin adhesive has good bonding properties and can firmly fix the resin diamond grinding head 9 in the receiving groove.

[0037] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0038] Example: In use, the resin diamond grinding head 9 is glued to the receiving groove of the first fixing frame 7 with epoxy resin adhesive. After the adhesive cures, the first fixing frame 7 with the resin diamond grinding head 9 is placed into the dovetail groove 2 at the front end of the tool holder 1, so that the first positioning hole 8 on the first fixing frame 7 is aligned with the positioning screw 3 on the tool holder 1. The positioning screw 3 is inserted for initial positioning, and the clamping screw 4 is tightened to further fix the first fixing frame 7 and the resin diamond grinding head 9. The assembled internal grinding tool assembly is then installed on the lathe chuck. The use is changed to " The copper or molybdenum rod is used to trim the arc surface of the resin diamond grinding head 9 to ensure the flatness of the grinding head and the relative positional accuracy between the grinding head and the workpiece contact surface. The assembled internal hole grinding tool assembly is removed from the lathe chuck and installed on the lathe turret tool post assembly. The lathe is started to rotate the workpiece. The feed of the tool bar body 1 is controlled to allow the resin diamond grinding head 9 to contact the inner hole of the workpiece and start the grinding process. During the processing, coolant is introduced into the water inlet 5 through the water inlet pipe. The coolant flows out from the water outlet 6 through the water channel to cool the grinding head and the workpiece.

[0039] When polishing is required, loosen the positioning screw 3 and clamping screw 4 on the tool holder body 1, remove the grinding assembly from the dovetail groove 2, attach the sandpaper 12 to one side of the second fixed frame 10, then put the fixing sleeve 14 on the outside of the second fixed frame 10, and use the six set screws 15 on the upper and lower sides to fix the sandpaper 12 in the reserved groove 13. Tighten the two set screws 15 on the left and right sides to prevent the fixing sleeve 14 from moving. Place the second fixed frame 10 with sandpaper 12 into the dovetail groove 2 at the front end of the tool holder body 1, so that the second positioning hole 11 on the second fixed frame 10 is aligned with the positioning screw 3 on the tool holder body 1. Insert the positioning screw 3 for initial positioning, tighten the clamping screw 4 to further fix the second fixed frame 10 and sandpaper 12, start the lathe, rotate the workpiece, and let the sandpaper 12 contact the inner hole of the workpiece to start the polishing process.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A machining tool suitable for grinding internal holes on a lathe, characterized in that, The tool includes a tool holder body (1), the front end of which is provided with a dovetail groove (2), the dovetail groove (2) is used to fix a grinding component or a polishing component, a pair of positioning screws (3) are screwed onto the tool holder body (1) above the dovetail groove (2), a clamping screw (4) is provided between the pair of positioning screws (3) and screwed onto the tool holder body (1), a water inlet hole (5) is provided at the end of the tool holder body (1), a water outlet hole (6) is provided at the front end of the tool holder body (1) above the dovetail groove (2), and a water channel is provided inside the tool holder body (1) for connecting the water inlet hole (5) and the water outlet hole (6).

2. The machining tool for grinding internal holes on a lathe according to claim 1, characterized in that, The grinding assembly includes a first fixing frame (7) with a dovetail structure. The first fixing frame (7) has a pair of first positioning holes (8) for the insertion of positioning screws (3). A receiving groove is provided on one side of the first fixing frame (7), and a resin diamond grinding head (9) is provided in the receiving groove.

3. The machining tool for grinding internal holes on a lathe according to claim 1, characterized in that, The polishing assembly includes a second fixing frame (10) with a dovetail structure. The second fixing frame (10) has a pair of second positioning holes (11) for the insertion of positioning screws (3). The second fixing frame (10) has a reserved groove (13) for fixing sandpaper (12). The sandpaper (12) is attached to one side of the second fixing frame (10). A fixing sleeve (14) is fitted on the outside of the second fixing frame (10). Set screws (15) are screwed around the fixing sleeve (14). The ends of the set screws (15) on the upper and lower sides press the sandpaper (12) against the reserved groove (13). The ends of the set screws (15) on the left and right sides press against the outer walls of the second fixing frame (10).

4. The machining tool for grinding internal holes on a lathe according to claim 3, characterized in that, The front contact surface of the second fixing frame (10) is an arc-shaped structure and is fitted with a rubber pad (16).

5. The machining tool for grinding internal holes on a lathe according to claim 1, characterized in that, The front end of the cutter bar body (1) is provided with a process screw hole (17), and screw plugs (18) are provided at both the process screw hole (17) and the water inlet hole (5).

6. The machining tool for grinding internal holes on a lathe according to claim 2, characterized in that, The resin diamond grinding head (9) is bonded to the receiving groove with epoxy resin adhesive.

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