Large-diameter combined indexable reamer

Abstract

The invention discloses a large-diameter combined indexable reamer. The reamer comprises a reamer head, a reamer blade and a reamer blade, wherein the cutter head is composed of a cutter head and a blade, the cutter head is divided into a cutter head base and a blade cover, the blade cover and the blade are detachably installed on the cutter head base, a notch for containing the blade is reserved in the blade cover, and a positioning piece is arranged at the connecting position of the blade and the cutter head base. The reamer further comprises a cutter bar, one end of the cutter bar is connected with a connecting main handle on a machine tool, the other end of the cutter bar is connected with the cutter head base, and a positioning piece is arranged at the joint of the cutter head base and the cutter bar. The combined reamer is simple in structure and low in cost, and after the combined reamer is used for many times and abraded, only the blades need to be replaced, and the whole cutter head does not need to be replaced; and secondly, when the combined reamer is used for processing holes, only the blade is in contact with a processed object, so that only the requirement on the material of the blade is required, and the requirement on the rest part of the reamer is not too high.

Description

Technical Field

[0001] The invention belongs to the technical field of reamers, and in particular relates to a large-diameter combined indexable reamer. Background Art

[0002] A reamer is a rotary tool with one or more teeth that is used to remove a thin layer of metal from the surface of a processed hole. The hole processed by the reamer can obtain a more precise size and shape.

[0003] A reamer is a hole processing tool. In reality, for holes with a diameter of 12 to 45 mm, an integrated reamer is generally used; for holes with a diameter of 45 to 100 mm, a welded reamer is generally used; for holes with a diameter greater than 100 mm, a boring tool or some non-indexable combination reamers are generally used, but integrated reamers are expensive, welded reamers are not suitable for large-diameter hole processing, boring tools have low processing efficiency, non-indexable combination reamers are too expensive, and the operation is very complicated. The operator cannot easily move the blade, otherwise it will affect the accuracy. Summary of the invention

[0004] The object of the present invention is to provide a large-diameter combined indexable reamer to solve the problems of high cost, low processing efficiency and complicated operation of the current reamer mentioned in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a large-diameter combined indexable reamer, the reamer comprising:

[0006] Blade head;

[0007] The cutter head is composed of a cutter disc and a blade, wherein the cutter disc is divided into a cutter disc base and a blade cover, wherein the blade cover and the blade are detachably mounted on the cutter disc base, and a notch for placing the blade is reserved on the blade cover, and a positioning piece is provided at the connection between the blade and the cutter disc base;

[0008] The reamer also includes:

[0009] The tool rod has one end connected to the connecting main handle on the machine tool, and the other end connected to the cutter disc base. A positioning piece is also provided at the connection between the cutter disc base and the tool rod.

[0010] As a preferred technical solution in the present invention, a main conical inner hole is opened at the center point of the lower end surface of the cutter disc base, and a plurality of threaded holes are distributed around the main conical inner hole; a second conical hole is opened at the center point of the end surface where the cutter rod is connected to the cutter disc base, and threaded holes corresponding to the number of positions on the cutter disc base are distributed around the second conical hole; the positioning piece is a steel ball, which is pressed and inserted into the main conical inner hole, and part of the steel ball is in the main conical inner hole, while the other part of the steel ball is placed in the second conical hole.

[0011] As a preferred technical solution in the present invention, a plurality of auxiliary conical inner holes are enclosed at the edge around the upper end surface of the cutter disc base, and a plurality of screw holes are opened around each auxiliary conical inner hole. A conical hole 1 is opened at the center of the blade, and threaded holes corresponding to the positions of the screw holes are opened around the conical hole 1. A locking screw is passed through the screw hole on the auxiliary conical inner hole and the threaded hole on the conical hole 1 to achieve a compression connection. The steel ball is pressed into the conical hole 1 and the auxiliary conical inner hole. When the worn blade is removed and replaced with a new blade, the transverse and longitudinal position of the blade relative to the cutter disc base will not change.

[0012] As a preferred technical solution in the present invention, a single through hole is also opened at the edge of the blade base, and the through hole is arranged adjacent to the screw hole. A positioning pin is inserted into the through hole. Each blade is formed with multiple blades. When the blade is installed, the positioning pin is against the back of one of the blades.

[0013] As a preferred technical solution in the present invention, the slot on the blade cover includes a placement slot that is enclosed at the edge, the blade is in the placement slot, and a gap is left between the two to avoid collision in later processing when they are fully fitted, and a positioning pin slot is provided on the inner wall of each of the placement slots, and the positioning pin is in the positioning pin slot to facilitate the installation of the positioning pin, and threaded holes of corresponding sizes are provided on the blade cover and the cutter disc base, and the two are fixed with tightening bolts.

[0014] As a preferred technical solution in the present invention, the inner diameters of the main conical inner hole, the auxiliary conical inner hole, the conical hole one and the conical hole two gradually decrease from the opening to the inner end surface. The setting of wide outside and narrow inside can produce extrusion when the steel ball is placed.

[0015] As a preferred technical solution in the present invention, one of the blade edges protrudes to the outside of the blade disc base, while the remaining blade edges are all placed in the placement slot, and the protruding blade edges of multiple blades have the same direction, thereby ensuring normal processing in the later stage.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Low cost. After the combined reamer of the present invention is worn out after repeated use, only the blade needs to be replaced, without replacing the entire cutter disc. Secondly, when the combined reamer is processing holes, only the blade will contact the object to be processed, so only the material of the blade is required, and the material requirements for the rest of the reamer are not too high, and ordinary metal can be used instead, which greatly reduces the use cost. At the same time, the reamer of the present invention only needs to remove the blade for coating, and there is no need to remove the entire cutter disc for coating treatment. Thirdly, the blade of the reamer of the present invention can be indexed, and a blade can be used multiple times by indexing, which greatly reduces the use cost of the blade.

[0018] 2. The technical requirements for operators are not high, and the operation is very simple. This product can realize simple blade rotation. Compared with the reamers on the market, which cannot be rotated, and the blade is removed by the customer and then installed, the positioning accuracy cannot reach the factory setting. It also avoids the phenomenon that once the reamer has a problem, the entire reamer needs to be sent back to the manufacturer for debugging; this product uses round steel ball positioning, so even if the blade is removed and then installed, it can ensure that the position of the blade after installation is the same as before, ensuring the high-precision repeated positioning requirements of the reamer. At the same time, the cutter disc and the cutter rod are also positioned by round steel balls. After the cutter disc is removed and then installed, it can be guaranteed that the position will not change from the previous position!

[0019] 3. The reamer has high precision. For large-diameter reamers, it is difficult to achieve a consistent distance from multiple blades to the center of the cutter disc because there is no such technology at present. However, this product uses steel balls to position and connect multiple blades. It only needs to grind the outer diameter of several blades before leaving the factory, and the precision can reach the micron level.

[0020] 4. In the field of large-diameter finishing, the reamer processes multiple blades at the same time, and the efficiency, wear resistance, roundness and straightness are all improved to a certain extent; the precision is high, the system is adjustable, and the system error is solved. The high repeatability of the blade solves the accuracy of the tool when it is used, and the accuracy of the blade when it is indexed; the diameter size is fixed and does not require adjustment by the operator. The operator only needs to adjust the system error for the first time, and no adjustment is required during processing, when the cutter disc is replaced, and when the blade is indexed; the cost is low. Except that the blade needs to be replaced with a new one after being indexed several times, the cutter disc, tool rod and main handle of the entire combined reamer can be used all the time; for different processed materials, a wider range of blade materials can be selected, and more suitable coating measures can also be selected without affecting the precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a cross-sectional view of the present invention;

[0022] Figure 2A top view of the cutter head of the present invention;

[0023] Figure 3 A top view of the blade cover of the present invention;

[0024] Figure 4 A top view of the cutter head base of the present invention;

[0025] Figure 5 This is a top view of the installation of the cutter disc base and the blade of the present invention;

[0026] Figure 6 For the present invention Figure 1 A magnified schematic diagram of area A in the middle.

[0027] In the figure:

[0028] 100, cutter head base; 100a, main conical inner hole; 100b, auxiliary conical inner hole; 100c, screw hole; 100d, through hole;

[0029] 101, blade cover; 101a, placement notch; 101b, positioning pin notch;

[0030] 200, blade; 200a, tapered hole 1;

[0031] 300, knife bar; 300a, tapered hole 2;

[0032] 400, positioning pin;

[0033] 500. Steel balls. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figures 1 to 6 The present invention provides a technical solution: a large-diameter combined indexable reamer, the reamer comprising:

[0036] Blade head;

[0037] The cutter head is composed of a cutter disc and a blade 200, and the cutter disc is divided into a cutter disc base 100 and a blade cover 101, wherein the blade cover 101 and the blade 200 are detachably mounted on the cutter disc base 100, and a notch for placing the blade 200 is reserved on the blade cover 101, and a positioning piece is provided at the connection between the blade 200 and the cutter disc base 100;

[0038] The reamer also includes:

[0039] One end of the tool rod 300 is connected to the connecting main handle on the machine tool, and the other end is connected to the cutter disc base 100. A positioning piece is also provided at the connection between the cutter disc base 100 and the tool rod 300.

[0040] In this embodiment, a main conical inner hole 100a is opened at the center point of the lower end surface of the cutter disc base 100, and a plurality of threaded holes are distributed around the main conical inner hole 100a; a second conical hole 300a is opened at the center point of the end surface where the cutter bar 300 is connected to the cutter disc base 100, and threaded holes corresponding to the number of positions on the cutter disc base 100 are distributed around the second conical hole 300a; the positioning member is a steel ball 500, which is pressed and inserted into the main conical inner hole 100 a, and part of the steel ball 500 is in the main conical inner hole 100a, while the other part of the steel ball 500 is placed in the second conical hole 300a. During installation, the locking screw is passed through the threaded holes on the cutter disc base 100 and the cutter rod 300 to achieve a compression connection. During the compression process, the steel ball 500 will be squeezed and slightly deformed by the inner wall of the main conical inner hole 100a and the second conical hole 300a to achieve an interference fit, so that high-precision positioning of the two can be achieved.

[0041] In this embodiment, a plurality of auxiliary conical inner holes 100b are enclosed at the edge of the upper end surface of the cutter disc base 100, and a plurality of screw holes 100c are formed around each auxiliary conical inner hole 100b. A conical hole 200a is formed at the center of the blade 200, and threaded holes corresponding to the positions of the screw holes 100c are formed around the conical hole 200a. A locking screw is passed through the screw hole 100c on the auxiliary conical inner hole 100b and the threaded hole on the conical hole 200a to achieve a compression connection. The steel ball 500 is pressed into the conical hole 200a and the auxiliary conical inner hole 100b. When the worn blade 200 is removed and replaced with a new blade 200, the horizontal and vertical positions of the blade 200 relative to the cutter disc base 100 will not change.

[0042] In this embodiment, a single through hole 100d is further provided at the edge of the blade base 100. The through hole 100d is arranged adjacent to the screw hole 100c, and a positioning pin 400 is inserted into the through hole 100d. A plurality of blades are formed on each blade 200. When the blade is installed, the positioning pin 400 is abutted against the back of one of the blades, and then the blade 200 and the blade base 100 are pressed and connected by the steel ball 500 and the pressing locking screw; during the pressing process, a slight deformation will also occur between the steel ball 500 and the auxiliary conical inner hole 100b and the conical hole 200a, achieving an interference fit and realizing high-precision positioning. The positioning pin 400 can ensure that the blade will not move left and right, because during the hole processing process, the blades of all the blades are rotated and cut in one direction, so the positioning pin 400 only needs to abut against the back of one of the blades to achieve lateral fixation.

[0043] In this embodiment, the notches on the blade cover 101 include placement notches 101a that are enclosed and opened at the edge. The blade 200 is located in the placement notches 101a, and a gap is left between the two to avoid collisions in later processing when they are fully fitted. A positioning pin notch 101b is opened on the inner wall of each placement notch 101a, and the positioning pin 400 is located in the positioning pin notch 101b, which is convenient for installing the positioning pin 400. The blade cover 101 and the cutter disc base 100 are both provided with threaded holes of corresponding sizes, and the two are fixed with compression bolts;

[0044] Each auxiliary conical inner hole 100b on the upper end surface of the cutter disc base 100 will have a corresponding number, and each blade 200 installed on each auxiliary conical inner hole 100b will also have a corresponding number. The blade 200 and the auxiliary conical inner hole 100b need to correspond one to one. For example, blade No. 1 200 is installed in auxiliary conical inner hole 100b No. 1, and blade No. 2 200 is installed in auxiliary conical inner hole 100b No. 2. The blades on each blade 200 will also be numbered. For example, blade No. 1 of blade No. 1 200 is numbered 1-1 blade, and the second blade of blade No. 1 200 is called 1-2 blade. Because each blade of each blade 200 needs to be ground to the outer circle before the entire reamer leaves the factory, it is necessary to ensure that each blade is at the center point of the cutter disc. To achieve a consistent distance, first place the No. 1 blade of all blades 200 on the cutter disc cutting position, and the remaining blades are in the placement slot 101a, and then perform the outer circle grinding process. After reaching a consistent distance, transfer the No. 2 blades of all blades 200 to the cutter disc cutting position and perform the outer circle grinding process, and so on, until all the blades are ground and can be shipped out of the factory for delivery to customers. During the use of the customer, when the No. 1 blades of all blades 200 are worn out and cannot be used, all blades 200 are removed, and the No. 2 blades of all blades 200 are transferred to the cutting position for use. When all the blades are worn out and cannot be used, only the blade 200 needs to be thrown away and replaced with a new blade 200 for continued use.

[0045] In this embodiment, the inner diameters of the main conical inner hole 100a, the auxiliary conical inner hole 100b, the conical hole 1 200a, and the conical hole 2 300a gradually decrease from the opening to the inner end surface. The setting of wide outside and narrow inside can produce extrusion when the steel ball 500 is placed.

[0046] In this embodiment, one of the blades of the blade 200 protrudes to the outside of the blade disc base 100, while the remaining blades of the blade 200 are all located in the placement slot 101a. The protruding blade edges of multiple blades 200 have the same direction, thereby ensuring normal processing in the later stage.

[0047] Although embodiments of the present invention have been shown and described (see the above detailed description for details), it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A large diameter combined indexable reamer, Features: The reamer includes: Blade head; The cutter head is composed of a cutter disc and a blade (200), wherein the cutter disc is divided into a cutter disc base (100) and a blade cover (101), wherein the blade cover (101) and the blade (200) are detachably mounted on the cutter disc base (100), and a notch for placing the blade (200) is reserved on the blade cover (101), and a positioning piece is provided at the connection between the blade (200) and the cutter disc base (100); The reamer also includes: The tool rod (300) has one end connected to the connecting main handle on the machine tool and the other end connected to the cutter disc base (100). A positioning piece is also provided at the connection between the cutter disc base (100) and the tool rod (300).

2. A large diameter combined indexable reamer according to claim 1, Features: A main conical inner hole (100a) is provided at the center point of the lower end surface of the cutter disc base (100), and a plurality of threaded holes are distributed around the main conical inner hole (100a); a second conical hole (300a) is provided at the center point of the end surface where the cutter rod (300) is connected to the cutter disc base (100), and threaded holes corresponding to the number of positions on the cutter disc base (100) are distributed around the second conical hole (300a); the positioning member is a steel ball (500), which is pressed and inserted into the main conical inner hole (100a), and part of the steel ball (500) is located in the main conical inner hole (100a), while the other part of the steel ball (500) is placed in the second conical hole (300a).

3. A large diameter combined indexable reamer according to claim 2, Features: A plurality of auxiliary conical inner holes (100b) are provided at the peripheral edge of the upper end surface of the blade disc base (100), and a plurality of screw holes (100c) are provided around each auxiliary conical inner hole (100b). A conical hole 1 (200a) is provided at the center of the blade (200), and threaded holes corresponding to the positions of the screw holes (100c) are provided around the conical hole 1 (200a), and the steel ball (500) is pressed into the conical hole 1 (200a) and the auxiliary conical inner hole (100b).

4. A large diameter combined indexable reamer according to claim 3, Features: A single through hole (100d) is also provided at the edge of the blade disc base (100), and the through hole (100d) is arranged adjacent to the screw hole (100c). A positioning pin (400) is inserted into the through hole (100d). Each blade (200) is formed with a plurality of blades, and the positioning pin (400) abuts against the back of one of the blades.

5. A large diameter combined indexable reamer according to claim 1, Features: The notches on the blade cover (101) include placement notches (101a) that are enclosed and opened at the edge, the blade (200) is located in the placement notches (101a), and a gap is left between the two. The inner wall of each placement notch (101a) is provided with a positioning pin notch (101b), and the positioning pin (400) is located in the positioning pin notch (101b). The blade cover (101) and the blade disc base (100) are both provided with threaded holes of corresponding sizes, and the two are fixed by tightening bolts.

6. A large diameter combined indexable reamer according to claim 3, Features: The inner diameters of the main tapered inner hole (100a), the auxiliary tapered inner hole (100b), the first tapered hole (200a), and the second tapered hole (300a) gradually decrease from the opening to the inner end surface.

7. A large diameter combined indexable reamer according to claim 5, Features: One of the blades of the blade (200) protrudes to the outside of the blade disc base (100), while the remaining blades of the blade (200) are all located in the placement slot (101a), and the protruding blade edges of the plurality of blades (200) are in the same direction.

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