Deep blind hole boring tool

Abstract

The utility model discloses a deep blind hole boring machining tool which comprises a boring rod connector, and the boring rod connector is provided with a connector inner cavity. The left end of the boring rod connector is connected with a cutter head, a plurality of cutter grooves are evenly distributed in the cutter head, every two symmetrically-arranged cutter grooves form a group, a boring cutter assembly is arranged in each cutter groove, and each boring cutter assembly comprises a boring cutter seat and a blade arranged on the boring cutter seat. The cutter head is provided with a cutter head inner cavity, four chip grooves are evenly distributed in the cutter head, the four chip grooves are all communicated with the cutter head inner cavity, the four chip grooves are all communicated with the corresponding cutter grooves, and the cutter head inner cavity is further communicated with the connector inner cavity. The deep blind hole boring tool can be used for machining an inner hole of an oil cylinder of an integral structure, scrap iron generated in the machining process is smoothly discharged, the quality and the integral strength of the oil cylinder are guaranteed, and economic benefits of enterprises are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of machining equipment, and particularly relates to a boring tool for deep blind holes. Background Art

[0002] The traditional machining of the inner hole of an oil cylinder adopts through-hole machining, which is simple to operate and the iron chips can be conveniently discharged through the through-hole. The disadvantage is that the cylinder barrel and the cylinder bottom must be of a split structure, and they are welded after being machined separately. Welding will affect the overall strength of the oil cylinder and it is difficult to bear huge pressure. And because it has been welded into an integral structure, the subsequent repair and maintenance of the inner hole of the oil cylinder are difficult and it is hard to perform rapid precision repair again. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a boring tool for deep blind holes, which can machine the inner hole of an oil cylinder with an integral structure, ensure the quality and overall strength of the oil cylinder, and improve the economic benefits of the enterprise.

[0004] To solve the above technical problem, the technical solution of the utility model is:

[0005] A boring tool for deep blind holes includes a boring bar connector, and the boring bar connector has a connector inner cavity; the left end of the boring bar connector is connected with a cutter head, and a plurality of cutter grooves are evenly arranged on the cutter head. Every two symmetrically arranged cutter grooves form a group, and a boring tool assembly is arranged in each cutter groove. The boring tool assembly includes a boring tool seat and a cutting blade arranged on the boring tool seat; the cutter head has a cutter head inner cavity, and four chip removal grooves are evenly arranged on the cutter head. The four chip removal grooves are all communicated with the cutter head inner cavity, the four chip removal grooves are all communicated with their corresponding cutter grooves, and the cutter head inner cavity is also communicated with the connector inner cavity.

[0006] Further, two groups of cutter grooves are arranged on the cutter head. From left to right, they are the first group of cutter grooves and the second group of cutter grooves, and the axial depth of the second group of cutter grooves is greater than the axial depth of the first group of cutter grooves.

[0007] Further, the axial depth of the first group of cutter grooves is 20 mm, and the axial depth of the second group of cutter grooves is 25 mm.

[0008] Further, a ball support assembly and a raceway are arranged on the outer surface of the cutter head, and balls are arranged on the ball support assembly around the raceway;

[0009] Further, the ball support assembly includes a ball mounting block, and ball mounting holes are annularly arranged on the ball mounting block, and the balls are mounted in the ball mounting holes.

[0010] Further, the ball mounting hole is a tapered hole, and the aperture of the ball mounting hole gradually decreases from the inner wall to the outer wall of the ball mounting block.

[0011] Further, a bearing seat is provided on the outer surface of the cutter head, and a thrust ball bearing is provided on the bearing seat; one end of the ball mounting block abuts against the cutter head, and the other end of the ball mounting block abuts against the thrust ball bearing.

[0012] Further, the raceway is in interference fit with the cutter head.

[0013] Further, a boring bar is connected to the right end of the boring bar connector, the boring bar has a boring bar inner cavity, and the boring bar inner cavity is communicated with the connector inner cavity.

[0014] Further, four carbide guide blocks are evenly distributed on the outer peripheral surface of the cutter head; four plastic guide blocks are evenly distributed on the outer peripheral surface of the boring bar connector.

[0015] After adopting the above technical solutions, the beneficial effects of the present utility model are as follows:

[0016] The deep blind hole boring tool includes a boring bar connector, and the boring bar connector has a connector inner cavity. The left end of the boring bar connector is connected to a cutter head, and a plurality of cutter grooves are evenly distributed on the cutter head. Every two symmetrically arranged cutter grooves are a group, and a boring tool assembly is provided in each cutter groove. The boring tool assembly includes a boring tool seat and a cutting blade provided on the boring tool seat. The cutter head has a cutter head inner cavity, and four chip removal grooves are evenly distributed on the cutter head. The four chip removal grooves are all communicated with the cutter head inner cavity, the four chip removal grooves are all communicated with their corresponding cutter grooves, and the cutter head inner cavity is also communicated with the connector inner cavity. Using the deep blind hole boring tool of the present utility model can machine the inner hole of the oil cylinder with an integral structure, and smoothly discharge the iron chips generated during the machining process, ensuring the quality and overall strength of the oil cylinder and improving the economic benefits of the enterprise. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the deep blind hole boring tool of the present utility model;

[0018] Figure 2 is Figure 1 the sectional view taken along the line A-A in

[0019] Figure 3 is Figure 2 the sectional view taken along the line B-B in

[0020] Figure 4 is a schematic structural diagram of the deep blind hole boring tool in the use state of the present utility model;

[0021] In the figure, 1 is a boring machine; 2 is a boring bar connector; 21 is the inner cavity of the connector; 3 is a cutter head; 31 is a chip removal groove; 32 is the inner cavity of the cutter head; 41 is a cutting blade A; 42 is a cutting blade B; 5 is a raceway; 6 is a ball mounting block; 71 is a ball A; 72 is a ball B; 8 is a bearing housing; 9 is a thrust ball bearing; 10 is a cemented carbide guide block; 11 is a plastic guide block; 12 is a connecting pipe; 13 is an iron chip pool; 14 is iron chips; 15 is an oil cylinder, 151 is the inner hole of the oil cylinder; 16 is a boring bar; 161 is the inner cavity of the boring bar, 17 is a guide sleeve; 18 is an oil receiver. Detailed implementation mode

[0022] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] Combined with Figure 1 and Figure 2 As commonly shown, a deep blind hole boring tool includes a boring bar connector 2, and the boring bar connector 2 has an inner cavity 21 of the connector.

[0024] The left end of the boring bar connector 2 is connected with a cutter head 3. A plurality of cutter grooves are evenly arranged on the cutter head 3. Every two symmetrically arranged cutter grooves form a group. A boring tool assembly is arranged in each cutter groove. The boring tool assembly includes a boring tool seat and a cutting blade arranged on the boring tool seat.

[0025] The cutter head 3 has an inner cavity 32 of the cutter head. Four chip removal grooves 31 are evenly arranged on the cutter head 3. The four chip removal grooves 31 are all communicated with the inner cavity 32 of the cutter head. The four chip removal grooves 31 are all communicated with their corresponding cutter grooves. The inner cavity 32 of the cutter head is also communicated with the inner cavity 21 of the connector.

[0026] Preferably, two groups of cutter grooves are arranged on the cutter head 3. From left to right, they are the first group of cutter grooves and the second group of cutter grooves. The axial depth of the second group of cutter grooves is greater than the axial depth of the cutter grooves of the first group.

[0027] The boring tool assemblies in each group of cutter grooves are designed in layers. The boring blades in each group of cutter grooves are arranged in a 180° vertical direction, which is convenient for measuring the tool tip size. The axial positions of the boring tool assemblies installed in each group of cutter grooves on the cutter head 3 differ by 2-5 mm, ensuring different feeding times and solving the problem in the prior art that the boring head simultaneously cuts the tool and scratches the inner wall without chip breaking.

[0028] Further preferably, the axial depth of the cutter grooves of the first group is 20 mm, and the axial depth of the cutter grooves of the second group is 25 mm.

[0029] The cutting blade installed in the first group of cutter grooves is denoted as cutting blade A 41, and the cutting blade installed in the second group of cutter grooves is denoted as cutting blade B 42.

[0030] Combined with Figure 1 、 Figure 2 、and Figure 3As shown together, a ball bearing assembly and a raceway 5 are provided on the outer surface of the cutter head 3, and balls are arranged around the raceway on the ball bearing assembly.

[0031] The raceway 5 and the cutter head 3 are preferably in interference fit.

[0032] Preferably, the ball bearing assembly includes a ball mounting block 6, and ball mounting holes are annularly arranged on the ball mounting block 6, and the balls are mounted in the ball mounting holes.

[0033] Further preferably, the ball mounting holes are tapered holes, and the aperture of the ball mounting holes gradually decreases from the inner wall to the outer wall of the ball mounting block 6. However, it must be ensured that the balls can be exposed.

[0034] The ball mounting holes are preferably arranged in two rows, and balls are arranged in both rows of ball mounting holes, namely ball A 71 and ball B 72 respectively.

[0035] Preferably, a bearing seat 8 is further provided on the outer surface of the cutter head 3, and a thrust ball bearing 9 is provided on the bearing seat 8. One end of the ball mounting block 6 abuts against the cutter head 3, and the other end of the ball mounting block 6 abuts against the thrust ball bearing 9.

[0036] Combined Figure 1 、 Figure 2 、 Figure 3 、and Figure 4 As shown together, a boring bar 16 is connected to the right end of the boring bar connecting head 2. The boring bar 16 has a boring bar inner cavity 161, and the boring bar inner cavity 161 is communicated with the connecting head inner cavity 21.

[0037] Preferably, four cemented carbide guide blocks 10 are evenly distributed on the outer peripheral surface of the cutter head 3; four plastic guide blocks 11 are evenly distributed on the outer peripheral surface of the boring bar connecting head 2. The stability during the machining process can be achieved.

[0038] A connecting pipe 12 is further connected to the right end of the boring bar 16. The connecting pipe 12 is communicated with the boring bar inner cavity 161, and the right end of the connecting pipe 12 extends into the chip basin 13.

[0039] The following is a detailed description of the process of machining the inner hole 151 of the oil cylinder 15 using the deep blind hole boring tool of the present invention:

[0040] Combined Figure 4 As shown, the oil cylinder 15 is fixed on the boring machine 1. A guide sleeve 17 is installed on the oil receiver 18 of the boring machine 1. The tool passes through the guide sleeve 17 and is inserted into the inner hole 151 of the oil cylinder 15. The power component (not shown in the figure) drives the oil cylinder 15 to rotate. The process and principle of using the deep blind hole boring tool of the present invention to machine the inner hole 151 of the oil cylinder are common knowledge for those skilled in the art and will not be elaborated here.

[0041] There is a gap between the contact surfaces of the guide sleeve 17 and the oil cylinder 15. The gap between the guide sleeve 17 and the oil cylinder 15 is denoted as the D position. And the outer diameter of the cutting tool is smaller than the inner diameter of the inner hole 151 of the oil cylinder. There is a gap between the cutting tool and the hole wall of the inner hole 151 of the oil cylinder. The D position is immersed in the cutting fluid. The cutting fluid enters the inner hole 151 of the oil cylinder through the gap between the outer periphery of the cutting tool and the hole wall of the inner hole 151 of the oil cylinder. Therefore, the cutter head inner cavity 31, the connector inner cavity 21, and the boring bar inner cavity 161 are all filled with the cutting fluid. The iron filings 14 generated during the machining of the cutting tool enter the chip removal groove 31 through the tool groove and then enter the cutter head inner cavity 32. Since there is cutting fluid in the cutter head inner cavity 32, the connector inner cavity 21, and the boring bar inner cavity 161, under the flushing of the cutting fluid, the iron filings 14 sequentially pass through the cutter head inner cavity 32, the connector inner cavity 21, and the boring bar inner cavity 161 and enter the connecting pipe 12, and finally enter the iron filings pool 13.

[0042] The technical features with serial numbers in this specification (such as boring tool A, boring tool B, ball A, ball B, the first group of tool grooves, the second group of tool grooves, etc.) are only for distinguishing each technical feature and do not represent the positional relationship, installation sequence, working sequence, etc. between the technical features.

[0043] In the description of this specification, it should be understood that the orientation or positional relationship described by "left end", "right end", "from left to right", "outer wall", "inner wall", "outer periphery", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0044] The present invention is not limited to the above specific embodiments. Those of ordinary skill in the art starting from the above concepts and making various transformations without creative labor fall within the protection scope of the present invention.

Claims

1. A deep blind hole boring tool, characterized in that: The boring bar connector comprises a boring bar connector having a connector inner cavity; a cutter disc is connected to the left end of the boring bar connector, a plurality of cutter grooves are evenly arranged on the cutter disc, and every two symmetrically arranged cutter grooves form a group, and a boring tool assembly is arranged in each of the cutter grooves, and the boring tool assembly comprises a boring tool seat and a blade arranged on the boring tool seat; The cutter disc has a cutter disc inner cavity, and four chip removal grooves are evenly distributed on the cutter disc. The four chip removal grooves are all connected to the cutter disc inner cavity, and the four chip removal grooves are all connected to their corresponding cutter grooves. The cutter disc inner cavity is also connected to the connector inner cavity.

2. The deep blind hole boring tool according to claim 1, characterized in that: The cutter disc is provided with two groups of cutter grooves, which are respectively a first group of cutter grooves and a second group of cutter grooves from left to right. The axial depth of the second group of cutter grooves is greater than the axial depth of the cutter grooves of the first group of cutter grooves.

3. The deep blind hole boring tool according to claim 2, characterized in that: The axial depth of the grooves of the first group of grooves is 20 mm, and the axial depth of the grooves of the second group of grooves is 25 mm.

4. The deep blind hole boring tool according to claim 1, characterized in that: The outer surface of the cutter disc is provided with a ball support assembly and a raceway, and the ball support assembly is provided with balls around the raceway.

5. The deep blind hole boring tool according to claim 4, characterized in that: The ball support assembly comprises a ball mounting block, a ball mounting hole is annularly arranged on the ball mounting block, and the ball is mounted in the ball mounting hole.

6. The deep blind hole boring tool according to claim 5, characterized in that: The ball mounting hole is a tapered hole, and the hole diameter of the ball mounting hole gradually decreases from the inner wall to the outer wall of the ball mounting block.

7. The deep blind hole boring tool according to claim 6, characterized in that: The outer surface of the cutter disc is also provided with a bearing seat, and a thrust ball bearing is provided on the bearing seat; one end of the ball mounting block abuts against the cutter disc, and the other end of the ball mounting block abuts against the thrust ball bearing.

8. The deep blind hole boring tool according to claim 4, characterized in that: The raceway is interference fit with the cutter disc.

9. The deep blind hole boring tool according to claim 1, characterized in that: The right end of the boring bar connector is connected with a boring bar, and the boring bar has a boring bar inner cavity, and the boring bar inner cavity is communicated with the connector inner cavity.

10. The deep blind hole boring tool according to claim 1, characterized in that: The outer circumference of the cutter disc is evenly distributed with four carbide guide blocks; the outer circumference of the boring bar connector is evenly distributed with four plastic guide blocks.

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