Combined reamer

Abstract

The utility model discloses a combined reamer, which relates to the field of labels and comprises a reamer bar, a core groove is axially arranged at the end of the reamer bar, and clamping grooves are uniformly arranged around the core groove. A blade is arranged at one end of the carrying strip, and a hook part matched with the clamping groove is arranged at the other end of the carrying strip; the blade is assembled with the cutter bar through the carrying strip, the carrying strip and the clamping groove are connected in a clamped mode for axial limiting, and the carrying strip is extruded by the core rod for radial limiting, so that the blade and the cutter bar are stably assembled into a whole, disassembly is convenient, the blade can be independently disassembled and replaced, the structure is simple, the cost is low, and the production efficiency is high. The replacement cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of tags, and particularly to a combined reamer. Background Technique

[0002] The PCD reamer uses a blade made of a hard material for reaming or finish machining the inner wall of a hole. The blade made of the hard material is the working part of the whole tool. It is prone to damage during long-term machining and needs to be replaced in time to ensure the machining quality. However, the core blade of the PCD reamer is fixed integrally with the tool body, and the PCD blade cannot be replaced separately, resulting in a relatively high overall replacement cost. Content of the Utility Model

[0003] The purpose of the utility model is to provide a combined reamer, and solve the following technical problems: how to make the reamer capable of independently disassembling and replacing the PCD blade to reduce the cost.

[0004] To solve the problems existing in the prior art, the technical scheme adopted by the utility model is as follows:

[0005] A combined reamer includes a tool shank, a core groove is axially opened at the end of the tool shank, and clamping grooves are evenly opened around the core groove;

[0006] A carrier strip, one end of the carrier strip is provided with a blade, and the other end of the carrier strip has a hook part adapted to the clamping groove;

[0007] A core rod, the core rod is axially inserted into the core groove, and the core rod radially presses the carrier strip to be positioned in the clamping groove.

[0008] Preferably, a sliding groove is opened on the surface of the core rod, a pressing strip is radially slidably arranged in the sliding groove, the pressing strip is aligned with the carrier strip, and a screw hole is formed on the surface of the pressing strip, and a screw penetrates through the tool shank and is in threaded connection with the screw hole.

[0009] Preferably, a countersunk through hole communicating with the core groove is opened on the surface of the tool shank, the screw penetrates through the countersunk through hole and is in threaded connection with the screw hole, and the screw does not protrude from the surface of the tool shank.

[0010] Preferably, an end plate is provided at the end of the core rod, and the end plate presses on the ends of each carrier strip.

[0011] Preferably, the cross-sectional shape of the core rod adapted to the core groove is polygonal.

[0012] Preferably, the cross-sectional shape of the core rod adapted to the core groove is circular, a sliding key is provided on the surface of the core rod, and a key groove is opened on the surface of the core groove, and the sliding key is axially adapted to be inserted into the key groove.

[0013] Compared with the related art, the utility model has the following beneficial effects:

[0014] The blade of the present utility model is assembled with the tool bar through a carrier strip, axially limited by snap - fitting the carrier strip with a card slot, and radially limited by a core rod pressing the carrier strip. The blade and the tool bar are stably assembled into one body, and the disassembly is also relatively convenient. The blade can be disassembled and replaced individually, reducing the replacement cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is a schematic diagram of the overall disassembled structure of the present utility model;

[0017] Figure 3 is a schematic diagram of the core rod being pulled out of the core slot of the present utility model;

[0018] Figure 4 is a schematic diagram of the core rod being inserted into the core slot of the present utility model.

[0019] Reference numerals: 1, tool bar; 11, core slot; 12, card slot; 13, countersunk through - hole; 14, screw; 2, carrier strip; 21, blade; 3, core rod; 31, sliding groove; 32, pressing strip; 33, screw hole; 34, end plate; 35, sliding key; 36, key slot. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments.

[0021] The combined reamer integrates the blade 21 with the tool bar 1 through the carrier strip 2. Here, a reamer with four blades 21 is taken as an example;

[0022] As Figures 1-4 shown, a core slot 11 is axially opened at the end of the tool bar 1, and four card slots 12 are evenly opened around the core slot 11. The blade 21 is fixed at the top end of the carrier strip 2. The tail end of the carrier strip 2 has a hook portion. Four carrier strips 2 are inserted into the core slot 11, and then the hook portions of each carrier strip 2 are snapped into the card slots 12 to axially lock the carrier strip 2. The blade 21 protrudes from the end of the tool bar 1. The core rod 3 is axially inserted into the core slot 11, and the outer wall of the core rod 3 radially presses the carrier strip 2 to radially limit the carrier strip 2. The screw 14 is used to penetrate the tool bar 1 to fix the core rod 3, so that the carrier strip 2 and the tool bar 1 are fixedly combined. When an individual blade 21 needs to be replaced, the screw 14 is disassembled, the core rod 3 is pulled out of the core slot 11, and then the carrier strip 2 corresponding to the blade 21 is pulled out of the card slot 12. After replacing the new blade 21 and carrier strip 2, they are snapped into the card slot 12 and the core rod 3 is reinstalled.

[0023] The mating cross-section of the core rod 3 and the core groove 11 can be polygonal, such as quadrilateral, which facilitates the accurate insertion of the core rod 3 into the core groove 11. If the mating cross-section of the core rod 3 and the core groove 11 is circular, a sliding key 35 needs to be fixed on the surface of the core rod 3, and a keyway 36 is opened on the surface of the core groove 11. The axial mating of the sliding key 35 and the keyway 36 ensures the accurate insertion of the core rod 3 into the core groove 11.

[0024] Four sliding grooves 31 are opened on the surface of the core rod 3. A pressing strip 32 is slidably arranged radially in the sliding grooves 31. The pressing strip 32 is aligned with each carrier strip 2. The surface of the pressing strip 32 has a screw hole 33. When the core rod 3 is fixed by a screw 14, the screw 14 passes through the tool bar 1 and is threadedly connected to the screw hole 33. Continuously tightening the screw 14 generates an outward pulling force on the pressing strip 32, so that the pressing strip 32 tightly presses the carrier strip 2, further improving the installation stability of the carrier strip 2.

[0025] A countersunk through hole 13 that penetrates the core groove 11 is opened on the surface of the tool bar 1. The screw 14 passes through the countersunk through hole 13 and is threadedly connected to the screw hole 33. The screw 14 does not protrude from the surface of the tool bar 1, so that the rotation stability of the assembled tool is relatively high.

[0026] The end of the core rod 3 has an end plate 34, and the end plate 34 presses on the ends of each carrier strip 2, further positioning the installation position of the carrier strip 2.

[0027] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined reamer, characterized in that: include: A knife rod (1), wherein a core groove (11) is axially formed at the end of the knife rod (1), and clamping grooves (12) are uniformly formed around the core groove (11); A carrier strip (2), one end of the carrier strip (2) being provided with a blade (21), and the other end of the carrier strip (2) being provided with a hook portion adapted to fit the card slot (12); The core rod (3) is axially inserted into the core groove (11), and the core rod (3) radially presses the carrier strip (2) to be positioned in the clamping groove (12).

2. The combined reamer according to claim 1, characterized in that: A sliding groove (31) is provided on the surface of the core rod (3), a pressure strip (32) is radially slidably arranged in the sliding groove (31), the pressure strip (32) is aligned with the carrier strip (2), a screw hole (33) is provided on the surface of the pressure strip (32), and a screw (14) passes through the knife rod (1) and is threadedly connected to the screw hole (33).

3. The combined reamer according to claim 2, characterized in that: The surface of the knife rod (1) is provided with a countersunk through hole (13) penetrating the core groove (11); a screw (14) penetrates the countersunk through hole (13) and is threadedly connected to the screw hole (33); the screw (14) does not protrude from the surface of the knife rod (1).

4. The combined reamer according to claim 1, characterized in that: The end of the core rod (3) is provided with an end plate (34), and the end plate (34) is pressed on the end of each carrier strip (2).

5. The combined reamer according to claim 1, characterized in that: The cross-section of the core rod (3) and the core groove (11) is polygonal.

6. The combined reamer according to claim 1, characterized in that: The core rod (3) and the core groove (11) have matching cross-sections in a circular shape. The surface of the core rod (3) has a sliding key (35). The surface of the core groove (11) has a key groove (36). The sliding key (35) is axially fitted and inserted into the key groove (36).

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