A device for rough and fine boring of large-diameter inner holes
By designing a large-bore inner hole rough boring integrated device for cylinder-type parts, the problems of low efficiency, high cost and complex production in the prior art are solved, and efficient and low-cost rough boring processing are achieved.
Patent Information
- Application Number
- CN202421407448.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-19
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-06-19
AI Technical Summary
The prior art has problems such as low efficiency, high cost and complex production in the finishing of inner holes of cylinder parts, especially in the rough boring process of large-bore inner holes.
A large-bore inner hole is designed, which includes a body, a plug, a cutting head body, a weight reduction groove and a wooden guide keyway. It is connected to the tool rod or joint through a multi-head square thread and a double-position stop, so that the primary clamping processing of rough boring and fine boring can be realized.
It realizes efficient rough and fine boring processing of large-bore inner holes, reduces manufacturing costs, improves production efficiency, and simplifies the production process.
Smart Images
Figure CN222710840U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of mechanical manufacturing, and specifically relates to a large-diameter inner hole rough and fine boring integrated device which can realize large-diameter inner hole rough and fine boring processing with low cost, high efficiency and simple manufacturing. Background Art
[0002] At present, the finishing of the inner hole of cylindrical parts in China is mostly to leave 0.2-0.3mm margin after rough and fine boring, and then honing the inner hole. In order to improve production efficiency and ensure the final size and form and position tolerance requirements of the inner hole, there are high requirements for the roundness and straightness of the inner hole before finishing. For cylindrical parts with inner hole margin within 5mm, in order to improve production efficiency, rough boring and fine boring are often clamped in one step. In order to save manufacturing costs, the integrated device for rough and fine boring of inner holes is designed by ourselves, so as to achieve the purpose of low cost, high efficiency and simple production in production and manufacturing. Utility Model Content
[0003] The utility model aims to overcome the shortcomings of the prior art and provide a large-diameter inner hole roughing and finishing integrated boring device which can save the manufacturing cost of the device and improve the production efficiency.
[0004] The technical solution of the utility model is achieved as follows: a rough and fine boring integrated device for large-diameter inner holes, comprising a main body, a plug installed and fixed in one end of the main body, a cutter head body welded and fixed on the plug, a weight-reducing groove and a wooden guide keyway provided on the outer surface of the main body, a multi-start square thread and a double positioning stop are provided in the inner cavity of the main body, the main body is connected to a tool rod or a joint through the multi-start square thread and the double positioning stop, a fine boring tool groove is provided on the main body, a fine boring tool that slides freely in the tool groove is installed in the fine boring tool groove; a rough boring tool groove is provided on the cutter head body, a threaded hole is processed above the rough boring tool groove, and the rough boring tool is fixedly installed in the rough boring tool groove by a clamping screw installed in the threaded hole.
[0005] The body is made of round steel or steel plate or seamless steel pipe to form the outer circle of the cutter body, and the outer circle and length of the cutter body are both left with allowances. An inner hole ΦD3, a positioning stop and a welding U-shaped groove that match the plug are processed in its inner hole; the plug is processed with a positioning outer circle ΦD3 and a welding U-shaped groove that match the body; the body and the plug are welded together through the U-shaped groove and assembled and welded into one, and the outer circle of the cutter body, a weight-reducing groove, a wood guide keyway, a fine boring tool groove, a body cooling water channel, a multi-start square thread connected to the tool rod or a joint and a double positioning stop are processed on the body.
[0006] Furthermore, a plug cooling water channel is also provided on the plug and is connected with the cooling water channel of the main body; a cutter head body cooling water channel is also provided on the cutter head body and is connected with the cooling water channel of the plug. The above cooling water channels are all connected with the fine boring tool groove and the rough boring tool groove. One cooling water channel is provided at the cutter head of the rough boring tool groove, and one cooling water channel is provided at each end of the fine boring tool groove. The coolant flows out through the water outlet of the cooling water channel and is poured onto the cutter heads of the rough boring tool and the fine boring tool to achieve the purpose of cooling the cutter head.
[0007] The distance L2 between the left end of the fine boring tool groove and the body is ≥20mm, which is conducive to the guidance of the fine boring tool.
[0008] The number of the wooden guide key grooves is 4 to 6, the depth of the wooden guide key grooves is 10 to 20 mm, and the angle between the wooden guide key grooves and the center of the body is 45 degrees.
[0009] The cutting groove on the cutter head body is 1mm higher than the center line of the cutter body.
[0010] The plug is connected to the body through a double positioning stop, and the matching clearance between the plug and the body is 0.05-0.1mm.
[0011] The weight reduction groove is at an angle of 45° to the center of the platform, and the fine boring tool groove and the rough boring tool groove are in the same plane.
[0012] The thickness of the plug exceeds the width of the fine boring tool by 5 to 10 mm.
[0013] The plug and the main body are provided with a cutter head positioning groove, and the cutter head is 10 mm away from the outer circle of the main body.
[0014] The positive effects of the technical solution of the utility model are as follows: the utility model is connected with the boring bar or joint through the inner hole stop and thread, and the size of the two tips of the fine boring bar is adjusted according to the hole diameter. After the fine boring bar is adjusted in size, it is installed in the tool groove of the cutter body, and the position of the rough boring bar is adjusted according to the hole diameter margin, fixed with screws, and guided by wooden guide keys. The spindle rotates, the rough boring bar is cut first, and the remaining small margin is cut again with the fine boring bar. The bar drives the cutter body to move in a straight line, and the inner hole rough and fine boring is realized in one clamping process. The main body can be made of seamless steel pipe, the plug is made of round steel or steel plate, and it is easier to find suitable raw materials. The cutter head body can be processed with square steel head or round steel. All three are welded, which is convenient and fast to manufacture and has low manufacturing cost. Therefore, the utility model has the advantages of simple structure, convenient manufacture and low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a front sectional view of the structure of the utility model.
[0016] Figure 2 It is a left view of the utility model.
[0017] Figure 3It is a top view of the structure of the utility model.
[0018] Figure 4 It is a structural front view of the main body of the utility model before assembly welding.
[0019] Figure 5 This is a structural front view of the plug of the utility model before assembly welding.
[0020] Figure 6 It is a front view of the structure of the main body and the plug after being welded together.
[0021] Figure 7 It is a left side view of the main body and the plug after being welded together.
[0022] Figure 8 It is a top view of the main body and the plug after being welded together.
[0023] Fig. 9 It is a structural schematic diagram of the rectangular thread of the utility model.
[0024] Fig.10 It is a front view of the cutter head body of the utility model.
[0025] Fig.11 It is a left side view of the cutter head body of the utility model.
[0026] Fig.12 It is a top view of the cutter head body of the present utility model.
[0027] The markings in the figure are: 1, cutter body 2, plug 3, main body 4, thread 5, positioning stop 6, wooden guide keyway 7, weight reduction groove 8, fine boring tool groove 9, water outlet hole 10, rough boring tool groove 11, water outlet groove. DETAILED DESCRIPTION
[0028] like Figure 1 , 2 As shown in Figure 3, a rough and fine boring integrated device for large-diameter inner holes comprises a body 3, a plug 2 installed and fixed in the inner cavity at one end of the body 3, a cutter head body 1 welded and fixed on the plug 2, and a weight reduction groove 7 and a wooden guide keyway 6 provided on the outer surface of the body 3. A multi-start square thread 4 and a double positioning stop 5 are provided in the inner cavity of the body 3, and the body 3 is connected to the tool rod or the joint through the multi-start square thread 4 and the double positioning stop 5. A fine boring tool groove 8 is provided on the body 3, and a fine boring tool that slides freely in the groove is installed in the fine boring tool groove 8; a rough boring tool groove 10 is provided on the cutter head body 1, and a threaded hole is processed above the rough boring tool groove 10, and the rough boring tool is fixed in the rough boring tool groove 10 by a clamping screw installed in the threaded hole. The body, the plug and the cutter head body are welded together to form a rough and fine boring integrated device for large-diameter inner holes.
[0029] The number of the wooden guide key grooves 6 is 4 to 6, the depth of the wooden guide key grooves 6 is 10 to 20 mm, the angle with the center of the body is 45 degrees, the groove at one end connected to the arbor is not opened, leaving a 5 to 10 mm groove not milled through, and the other end is completely milled through.
[0030] The body 3 is made of round steel or steel plate or seamless steel pipe to form the outer circle of the cutter body. The outer circle and length of the cutter body are both left with allowances. The inner hole ΦD3, positioning stop and welding U-shaped groove matching the plug 2 are processed in the inner hole; the plug 2 is processed with the positioning outer circle ΦD3 and welding U-shaped groove matching the body 3; the body 3 and the plug 2 are welded through the U-shaped groove and assembled and welded into one body, and the outer circle of the cutter body, the weight reduction groove 7, the wood guide keyway 6, the fine boring tool groove 8, the body cooling water channel 9, the multi-head square thread 4 connected to the tool rod or the joint and the double positioning stop 5 are processed on the body 3. Two platforms and four weight reduction grooves 7 are milled on the body, and a fine boring tool groove for easy processing is set at the center of the platform. The fine boring tool head and the rough boring tool head are located in the same plane. Two weight reduction grooves that are connected to the left and right are processed in the vertical direction of the two platforms, and two non-connected weight reduction grooves are processed at the right end of the platform.
[0031] A plug cooling water channel 11 is also provided on the plug 2 and is connected with the main body cooling water channel 9; a cutter head body cooling water channel is also provided on the cutter head body 1 and is connected with the plug cooling water channel 11. The above cooling water channels are all connected with the fine boring tool groove 8 and the rough boring tool groove 10. One cooling water channel is provided at the cutter head of the rough boring tool groove 10, and one cooling water channel is provided at each end of the fine boring tool groove 8. The coolant flows out through the water outlet of the cooling water channel and is poured onto the cutter heads of the rough boring tool and the fine boring tool to achieve the purpose of cooling the cutter head.
[0032] The distance L2 between the fine boring tool groove on the main body and the left end of the main body is ≥20 mm, which is conducive to guiding the fine boring tool.
[0033] A rough boring tool groove is machined on the cutter head body, and the rough boring tool is installed in the groove. The rough boring tool is fixed in the groove by screws, and the upper plane of the groove on the cutter head body (1) is 1 mm higher than the center line of the cutter body.
[0034] The main body of the rough and fine boring device is made of seamless steel pipe, and an inner hole matching with the plug is processed on the main body. The plug 2 is connected to the main body 3 through a double positioning stop 5, and the matching clearance between the plug 2 and the main body 3 is 0.05-0.1mm. U-shaped welding grooves are processed on the main body and the plug respectively, and the other end of the plug is welded to the inner hole of the main body by a fillet weld.
[0035] The rough and fine boring integrated device processes a cutter head body position groove on the main body and plug assembly weldment to facilitate the welding and positioning of the cutter head body.
[0036] The rough and fine boring integrated device processes a fine boring tool groove on the main body and the plug assembly weldment for installing the fine boring tool, and the matching clearance between the two is 0.05mm. The fine boring tool groove is processed first, and then the square size of the fine boring tool is customized according to the actual size of the groove.
[0037] like Figure 1 , 2 As shown in Figure 3, the inner cavity of the main body 3 is provided with a multi-start square thread 4 and a double positioning stop 5, and the main body 3 is connected to the tool rod or the joint through the multi-start square thread 4 and the double positioning stop 5. A fine boring tool groove is opened on the main body 3, and the fine boring tool is installed in the tool groove and slides freely; a rough boring tool groove is opened on the cutter head body 1, and a threaded hole is processed above the tool groove, and the rough boring tool is fixed in the tool groove by a tightening screw.
[0038] like Figure 4 As shown, the main body 3 is made of a seamless steel pipe to form the outer circle of the cutter body, and the outer circle and length of the cutter body are both left with allowances, and an inner hole ΦD3 and a welding groove that match the plug are processed in the inner hole.
[0039] like Figure 5 As shown, the plug 2 is processed to form a positioning outer circle ΦD3 and a welding groove that matches the body 3.
[0040] like Figure 6 As shown, the body 3 and the plug 2 are welded via a U-shaped groove. Figure 1 , 3 As shown, the cutter head body 1 is welded to the plug 2 .
[0041] like Figure 6 , 7 As shown, a weight-reducing groove 7 and a wooden guide keyway 6 are machined on the outer circle of the cutter body. The number of the wooden guide keyways 6 is 4. The outer circle size of the device is designed according to the aperture size to be machined, and the weight-reducing groove and the fine boring tool groove processing platform are designed. The weight-reducing groove and the center of the platform form a 45° angle, and the rough boring tool groove and the fine boring tool groove are in the same plane. The bottom size of the weight-reducing groove is designed according to the outer circle size of the body 3 and the maximum size of the inner hole of the body 3. The depth of the guide keyway is generally 10 to 20 mm.
[0042] like Figure 1 , 3 As shown in , 6 and 8, the plug 2 is connected to the body 3 through the stopper ΦD3, and the matching clearance between the two is 0.05-0.1mm; the plug 2 is welded to the body 3 through a U-shaped groove.
[0043] like Figure 1 As shown, the cutter head body 1 and the body 3 are provided with a body cooling water channel 9. Figure 1 , 10 As shown, the cutting groove on the cutter head body 1 is 1 mm higher than the center line of the cutter body.
[0044] like Figure 1 , 3 As shown, a plug cooling water channel 11 is provided between the plug 2 and the body 3. Figure 1 As shown, the distance L2 between the fine boring tool groove and the left end of the body is ≥20mm, which is conducive to guiding the fine boring tool.
[0045] like Figure 7 , 8 As shown, a cutter head positioning groove is machined on the plug 2 and the main body 3, and the distance L1 between the cutter head and the outer circle of the main body is generally preferably 10 mm.
[0046] like Fig.10 , 11 As shown in 12, select suitable round steel or steel plate to process and manufacture the cutter head body 1. The rough boring cutter head body size is designed according to the aperture size to be processed, and the cutter groove size L3×L3 on the cutter head body is 0.5mm larger than the rough boring cutter square.
[0047] like Figure 6 , 8 As shown, the body 3 and the plug 2 are made of seamless steel pipes and round steel. After rough quenching and tempering, the two are semi-finished: the positioning stop ΦD3 and the welding groove are processed, the two are assembled and welded, and the remaining outer circles and inner holes are processed; then the cutter body 1 is welded, and the rough boring tool groove and the screw hole position line are marked based on the finely processed outer circle and end face of the body 3, and then the rough boring tool groove and the fine boring tool groove are wire cut, and then the screw holes are drilled. After all the processing is completed, the cooling water channel 9 of the body and the cooling water channel 11 of the plug are processed. A water outlet is designed near the groove of the cutter body 1, and a water outlet is designed near both ends of the fine boring tool groove. The water outlet diameter is selected from φ12 to 20 mm to facilitate smooth water discharge and enhance the cooling speed of the rough boring tool blade and the fine boring tool blade.
[0048] As shown in the figure, the plug and the body are first processed, and then the two are welded together to finely process the outer circle of the device, the weight reduction groove, the guide keyway, the stopper and the thread of the connection part; the positioning groove of the cutter body is processed, and the two are positioned and welded together, and the rough boring tool groove is processed on the cutter body, and the fine boring tool groove is processed on the body, and the water hole is processed. The rough boring tool is installed in the cutter square of the cutter body, the size is adjusted, and the rough boring tool is tightened with screws. After the size is adjusted, the fine boring tool is installed in the fine boring tool groove. Connect this device with the tool rod, install the wooden guide key, rotate the spindle, and the tool rod drives the rough and fine boring device to move linearly to achieve rough and fine boring processing of the inner hole.
Claims
1. A device for roughing and finishing a large-diameter inner hole, comprising a body (3), a plug (2) mounted and fixed at one end of the body (3), a cutter head (1) welded and fixed to the plug (2), a weight-reducing groove (7) and a wood guide keyway (6) provided on the outer surface of the body (3), characterized in that: A multi-start square thread (4) and a double positioning stop (5) are provided in the inner cavity of the body (3), and the body (3) is connected to a tool rod or a joint via the multi-start square thread (4) and the double positioning stop (5). A fine boring tool groove (8) is provided on the body (3), and a fine boring tool that slides freely in the groove is installed in the fine boring tool groove (8); a rough boring tool groove (10) is provided on the cutter head body (1), and a threaded hole is processed above the rough boring tool groove (10), and the rough boring tool is fixedly installed in the rough boring tool groove (10) by a clamping screw installed in the threaded hole.
2. The device for rough and fine boring of large-diameter inner holes according to claim 1 is characterized in that: The body (3) is made of round steel or steel plate or seamless steel pipe to form the outer circle of the cutter body, and the outer circle and length of the cutter body are both left with margins. An inner hole ΦD3, a positioning stopper and a welding U-shaped groove matching the plug (2) are processed in the inner hole; the plug (2) is processed with a positioning outer circle ΦD3 and a welding U-shaped groove matching the body (3); the body (3) and the plug (2) are welded through the U-shaped groove and assembled and welded into one body, and the outer circle of the cutter body, a weight-reducing groove (7), a wood guide keyway (6), a fine boring tool groove (8), a body cooling water channel (9), a multi-start square thread (4) connected to the cutter rod or a joint, and a double positioning stopper (5) are processed on the body (3).
3. The device for rough and fine boring of large-diameter inner holes according to claim 2, characterized in that: The plug (2) is also provided with a plug cooling water channel (11) which is in communication with the main body cooling water channel (9); the cutter head body (1) is also provided with a cutter head body cooling water channel which is in communication with the plug cooling water channel (11). The above cooling water channels are all connected with the fine boring tool groove (8) and the rough boring tool groove (10). One cooling water channel is provided at the cutter head of the rough boring tool groove (10), and one cooling water channel is provided at each end of the fine boring tool groove (8). The coolant flows out through the water outlet of the cooling water channel and is poured onto the cutter heads of the rough boring tool and the fine boring tool, thereby achieving the purpose of cooling the cutter head.
4. The device for rough and fine boring of large-diameter inner holes according to claim 1, characterized in that: The distance L2 between the fine boring tool groove (8) and the left end of the body (3) is ≥20 mm.
5. The device for rough and fine boring of large-diameter inner holes according to claim 1, characterized in that: The number of the wooden guide key grooves (6) is 4 to 6, the depth of the wooden guide key grooves (6) is 10 to 20 mm, and the angle between the wooden guide key grooves (6) and the center of the body is 45°.
6. The device for rough and fine boring of large-diameter inner holes according to claim 1, characterized in that: The upper cutting groove of the cutter head body (1) is 1 mm higher than the center line of the cutter body.
7. The device for rough and fine boring of large-diameter inner holes according to claim 1, characterized in that: The plug (2) is connected to the body (3) via a double positioning stop (5), and the matching clearance between the plug (2) and the body (3) is 0.05-0.1 mm.
8. The device for rough and fine boring of large-diameter inner holes according to claim 1, characterized in that: The weight reduction groove (7) is at an angle of 45° with the center of the platform, and the fine boring tool groove (8) and the rough boring tool groove (10) are in the same plane.
9. The device for rough and fine boring of large-diameter inner holes according to claim 1, characterized in that: The thickness of the plug (2) exceeds the width of the fine boring tool by 5 to 10 mm.
10. The device for rough and fine boring of large-diameter inner holes according to claim 1, characterized in that: The plug (2) and the main body (3) are provided with a cutter head body positioning groove, and the cutter head body (1) is 10 mm away from the outer circle of the main body.