High-strength straight-shank twist drill

Abstract

The utility model discloses a high-strength straight-shank twist drill which comprises a twist drill body used for installation, a first arc groove fixedly formed in the outer wall of the twist drill body and a second arc groove formed in the inner wall of the twist drill body. The twist drill comprises a twist drill body and further comprises a connector, the connector is mounted at the upper end of the twist drill body, a first mounting groove and a second mounting groove are formed in the upper end of the twist drill body, the second mounting groove is located in the lower end of the first mounting groove, a clamping block is arranged in the first mounting groove, and a connecting rod is fixed to the left end of the clamping block; and a spring is arranged on the outer side of the connecting rod, a mounting rod is arranged in the second mounting groove, hole grooves are formed in the left end and the right end of the mounting rod, and bolts are mounted in the hole grooves. According to the high-strength straight-shank twist drill, cooling treatment can be conveniently achieved when the auxiliary twist drill works, the straight-shank twist drill can be conveniently and rapidly installed, the position of the high-strength straight-shank twist drill can be conveniently fixed when the high-strength straight-shank twist drill is drilled, and the disengagement phenomenon is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of high-strength straight shank twist drills, in particular to a high-strength straight shank twist drill. Background Technique

[0002] The existing straight shank twist drill has a relatively large core thickness and a relatively small core thickness increment, resulting in more material used for processing the twist drill. Moreover, during the processing of workpieces by the twist drill, its strength cannot be effectively guaranteed, and it is prone to breakage after being used for a period of time. At the same time, the chips generated during the processing of the existing tool are difficult to be effectively discharged. The existence of chips accelerates the wear of each component, greatly reducing the service life of the tool and the surface quality of the workpiece.

[0003] A high-strength straight shank twist drill provided by the publication number CN102294506A. It includes a shank part and a cutting edge part. The core thickness of the cutting edge part is 50% smaller than that of the standard drill bit, and the core thickness increment is twice that of the standard drill bit. The present invention adopts an optimized product structure of the drill edge and profile, and a unique processing technology method, so that the product has a small core thickness, a large core thickness increment, and a unique chip fluting type, making the chips easy to discharge. The present invention saves more than 20% of materials and about 50% of auxiliary materials, improves the production efficiency by more than 50%, and increases the service life by more than 1.5 times.

[0004] The above-mentioned existing technical solutions have the following defects: it is not convenient to assist in cooling during the operation of the twist drill, it is not convenient to quickly install the straight shank twist drill, it is not convenient to fix the position during drilling of the high-strength straight shank twist drill, and it is impossible to avoid the occurrence of detachment. Therefore, the utility model provides a high-strength straight shank twist drill to solve the above-mentioned problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a high-strength straight shank twist drill to solve the problems of inconvenience in assisting in cooling during the operation of the twist drill, inconvenience in quickly installing the straight shank twist drill, inconvenience in fixing the position during drilling of the high-strength straight shank twist drill, and inability to avoid the occurrence of detachment as mentioned in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: a high-strength straight shank twist drill, including: a twist drill body for installation, a first arc groove fixedly arranged on the outer wall of the twist drill body, and a second arc groove arranged on the inner wall of the twist drill body;

[0007] It further includes a connector. The upper end of the twist drill body is provided with a connector, and a first installation groove and a second installation groove are arranged inside the upper end of the twist drill body. The second installation groove is located at the lower end of the first installation groove. A clamping block is arranged inside the first installation groove, a connecting rod is fixed to the left end of the clamping block, and a spring is arranged on the outer side of the connecting rod. An installation rod is arranged inside the second installation groove, hole grooves are arranged at the left and right ends of the installation rod, and bolts are installed inside the hole grooves.

[0008] Preferably, the first arc groove is symmetrically arranged with respect to the center line of the twist drill body, and the second arc groove is symmetrically arranged with respect to the center line of the first arc groove.

[0009] Preferably, the upper end of the twist drill body is in a fitting arrangement with the connector, and the clamping block forms a sliding structure inside the connector.

[0010] Preferably, the inside of the first installation groove is connected to the clamping block in a clamping manner, and the cross section of the clamping block is in an arc shape.

[0011] Preferably, the left and right sides of the clamping block are in a fitting state with the spring, and the inside of the spring is in a fitting state with the connecting rod.

[0012] Preferably, the inside of the hole groove is connected to the bolt in a clamping manner, and the upper end of the bolt is connected to the connector in a threaded manner.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: This high-strength straight shank twist drill facilitates the cooling treatment during the work of the twist drill, facilitates the rapid installation of the straight shank twist drill, facilitates the fixation of the position of the high-strength straight shank twist drill during drilling, and avoids the phenomenon of detachment.

[0014] 1. There are provided a twist drill body, a first arc groove and a second arc groove. When the twist drill body processes and drills an object, in order to be able to rapidly cool down, the first arc groove and the second arc groove are arranged on the outer wall and the inner wall of the twist drill body. When the twist drill body drills a hole, the water sprayed by the water gun enters the inside of the drilled object through the first arc groove and the second arc groove, thereby assisting in its cooling and facilitating the cooling treatment during the work of the twist drill.

[0015] 2. There are a first installation groove, a clamping block and a spring. When it is necessary to quickly splice the twist drill body and the connector, insert the twist drill body into the hole groove at the lower end of the connector. When the twist drill body contacts the clamping block during installation, it is squeezed and slides to the left and right sides, and the clamping block squeezes the spring. When the upper end of the twist drill body is installed in the connector to the appropriate position, at this time, the spring rebounds through its own elastic force to drive the clamping block to engage into the inside of the first installation groove, thus completing the quick installation of the twist drill body, which is convenient for the quick installation of the straight shank twist drill.

[0016] 3. There are an installation rod, a hole groove and a bolt. In order to ensure that the twist drill will not shift or loosen during high-strength drilling, insert the installation rod through the inside of the second installation groove, and then install bolts in the inner hole grooves at both left and right ends of the installation rod. The upper end of the bolt is connected to the hole groove of the connector, so that the position of the twist drill body can be fixed, which is convenient for fixing the position of the high-strength straight shank twist drill during drilling and avoiding detachment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a front view sectional structure schematic diagram of the present utility model;

[0018] Figure 2 is a side view sectional structure schematic diagram of the present utility model;

[0019] Figure 3 is a top view sectional structure schematic diagram of the present utility model;

[0020] Figure 4 is the present utility model Figure 1 the enlarged structure schematic diagram at A in.

[0021] In the figure: 1. Twist drill body; 2. First arc groove; 3. Second arc groove; 4. Connector; 5. First installation groove; 6. Second installation groove; 7. Clamping block; 8. Connecting rod; 9. Spring; 10. Installation rod; 11. Hole groove; 12. Bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0023] Please refer to Figures 1-4, the present utility model provides a technical solution: a high-strength straight shank twist drill, which includes a twist drill body 1, a first arc groove 2, a second arc groove 3, a connector 4, a first installation groove 5, a second installation groove 6, a clamping block 7, a connecting rod 8, a spring 9, a mounting rod 10, a hole groove 11 and a bolt 12.

[0024] When using this high-strength straight shank twist drill, as Figure 1 , Figure 3 and Figure 4 shown, a connector 4 is installed at the upper end of the twist drill body 1, and a first installation groove 5 and a second installation groove 6 are provided inside the upper end of the twist drill body 1, and the second installation groove 6 is located at the lower end of the first installation groove 5. A clamping block 7 is provided inside the first installation groove 5, and a connecting rod 8 is fixed to the left end of the clamping block 7, and a spring 9 is provided on the outer side of the connecting rod 8. A mounting rod 10 is provided inside the second installation groove 6, and hole grooves 11 are provided at the left and right ends of the mounting rod 10, and bolts 12 are installed inside the hole grooves 11. When the twist drill needs to be used, first install the twist drill body 1 inside the connector 4, and before the twist drill body 1 enters the lower end inside the connector 4, it contacts the clamping block 7 inside the twist drill body 1, so that the clamping block 7 slides to the left and right sides, and the clamping block 7 contracts by squeezing the spring 9. When the twist drill body 1 moves to a suitable position, the clamping block 7 is snapped into the first installation groove 5 by the elastic force of the spring 9, and the position of the twist drill body 1 is fixed. However, in order to prevent the twist drill body 1 from loosening during drilling, insert the mounting rod 10 through the inside of the second installation groove 6, and then install bolts 12 inside the hole grooves 11 at the left and right ends of the mounting rod 10. The upper end of the bolt 12 is fixedly connected to the connector 4, and the position of the twist drill body 1 can be fixed. However, when the twist drill body 1 rotates to drill holes, a high-temperature phenomenon will occur, causing damage to the twist drill body 1. Therefore, the water that cools the twist drill body 1 assisted by the first arc groove 2 and the second arc groove 3 on the outer inner wall of the twist drill body 1 flows downward through the first arc groove 2 and the second arc groove 3 during the operation of the twist drill body 1, thereby helping the twist drill body 1 to achieve rapid cooling treatment. This is the usage method of this high-strength straight shank twist drill.

[0025] The standard parts used in the present utility model can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, welding, etc. that are mature in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0026] Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A high-strength straight-shank twist drill, comprising: A twist drill body (1) for installation, a first arc groove (2) fixedly arranged on the outer wall of the twist drill body (1) and a second arc groove (3) arranged on the inner wall of the twist drill body (1); It is characterized by further comprising: A connecting head (4), the upper end of the twist drill body (1) is equipped with the connecting head (4), and the upper end of the twist drill body (1) is provided with a first mounting groove (5) and a second mounting groove (6), and the second mounting groove (6) is located at the lower end of the first mounting groove (5), a clamping block (7) is provided inside the first mounting groove (5), and a connecting rod (8) is fixed to the left end of the clamping block (7), and a spring (9) is provided on the outside of the connecting rod (8), and a mounting rod (10) is provided inside the second mounting groove (6), and hole grooves (11) are provided at the left and right ends of the mounting rod (10), and bolts (12) are installed inside the hole groove (11).

2. A high-strength straight-shank twist drill according to claim 1, characterized in that: The first arc groove (2) is symmetrically arranged with respect to the center line of the twist drill body (1), and the second arc groove (3) is symmetrically arranged with respect to the center line of the first arc groove (2).

3. A high-strength straight-shank twist drill according to claim 1, characterized in that: The upper end of the twist drill body (1) is arranged in close contact with the connecting head (4), and the clamping block (7) forms a sliding joint inside the connecting head (4).

4. A high-strength straight-shank twist drill according to claim 1, characterized in that: The interior of the first installation groove (5) is connected to the clamping block (7) in a clamping manner, and the cross section of the clamping block (7) is arranged in an arc shape.

5. The high-strength straight-shank twist drill according to claim 1, characterized in that: The left and right sides of the clamping block (7) are arranged in a close-fitting state with the spring (9), and the interior of the spring (9) is arranged in a close-fitting state with the connecting rod (8).

6. The high-strength straight-shank twist drill according to claim 1, characterized in that: The interior of the hole groove (11) is connected to the bolt (12) in a snap-fitting manner, and the upper end of the bolt (12) is connected to the connecting head (4) in a threaded manner.

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