Screw tap with different screwing and cutting directions

Abstract

The utility model discloses a screw tap with different spiral and cutting directions, which comprises a handle part, a cutting part is arranged at the front end of the handle part, a spiral cutting edge is arranged on the side wall of the cutting part, a cutting groove is arranged at the end part of the cutting part, a bottom cutting edge is formed at the end part of the cutting groove, and the bottom cutting edge is arranged at the end part of the bottom cutting edge. The cutting groove is communicated with a spiral chip removal groove, the rotating direction of the chip removal groove is consistent with that of the spiral cutting edge, a chip breaking edge is formed at the joint of the cutting groove and the chip removal groove, the chip breaking edge is arranged in a bias manner, and the bias of the chip breaking edge is opposite to the rotating direction of the chip removal groove. By arranging the cutting grooves in the staggered mode and the chip discharging grooves of the spiral structure, edges, namely the chip breaking blades are formed at the connecting positions of the cutting grooves and the chip discharging grooves, accumulation and adhesion generated by bottom cutting can be cut up through deflection arrangement of the chip breaking blades, the influence on cutting is effectively reduced, and the cutting efficiency and the thread quality are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to tap technical field, especially a tap of helical and cutting different direction. BACKGROUND

[0002] The tap, commonly known as the tap, is a standard tool for processing cylindrical and conical internal threads, and is a kind of internal thread processing cutter. The tap includes a cutting part, the cutting part has a helical groove, the helical direction of the helical groove is called the rotation direction, the cutting direction of the blade edge is called the tangential direction, and the helical groove mainly plays the role of chip removal and guiding cutting.

[0003] However, the rotation direction and the tangential direction of the conventional tap are the same, that is, left rotation left cutting or right rotation right cutting. In actual use, the chips tend to be discharged forward, and the debris is prone to form accumulation and adhesion at the bottom, which may hinder the further cutting of the cutting blade, especially in blind hole processing, the chips are difficult to discharge, which may lead to reduced cutting efficiency and poor thread quality. INVENTION CONTENTS

[0004] The utility model discloses a tap of helical and cutting different direction.

[0005] To solve the above technical problems, the utility model adopts the technical scheme that:

[0006] The utility model provides a tap of helical and cutting different direction, including handle part, the front end of handle part is equipped with cutting part, the helical cutting edge of spiral shape is set up on the lateral wall of cutting part, the cutting groove is set up on the end of cutting part, the end of cutting groove forms the bottom cutting edge, the spiral shape of the chip groove is communicated on the cutting groove, the rotation direction of chip groove is identical with the rotation direction of helical cutting edge, the junction of cutting groove and chip groove forms the chip breaking edge, the chip breaking edge is deviated and sets up, and the deviation of chip breaking edge is opposite to the rotation direction of chip groove.

[0007] Further, the front end of the cutting part is in the shape of a circular truncated cone.

[0008] Further, the cutting groove is provided with three, and the three cutting grooves are arranged in a circular array.

[0009] Further, the cross sections of the cutting groove and the chip groove are both in the shape of an arc, and the groove depth of the cutting groove is greater than the groove depth of the chip groove.

[0010] The utility model has the advantages of:

[0011] By setting the cutting groove and the chip removal groove in a staggered manner and in a spiral structure, the connecting part of the two forms an edge, that is, a chip breaking edge. By setting the chip breaking edge to be inclined, the accumulation and adhesion caused by bottom cutting can be cut, the influence on cutting is effectively reduced, and the cutting efficiency and thread quality are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 A structure diagram of the tap with spiral and cutting directions being opposite is provided in the present application.

[0013] Fig. 2 A front view of the tap with spiral and cutting directions being opposite is provided in the present application.

[0014] In the figure, 1, handle part; 2, cutting part; 3, blade part; 31, spiral cutting edge; 311, front blade; 312, rear blade; 32, bottom cutting edge; 4, chip removal groove; 5, cutting groove; 6, chip breaking edge. DETAILED DESCRIPTION

[0015] The embodiments of the present application will be described in detail below with specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification. The present application can also be implemented or applied in different specific embodiments, and each detail in the specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following examples and features in the examples can be combined with each other without conflict.

[0016] It should be noted that the diagrams provided in the following examples only illustrate the basic concept of the present application in a schematic manner, and only the components related to the present application are shown in the diagrams, not the number, shape and size of the components in actual implementation. The shape, number and proportion of each component in actual implementation can be changed arbitrarily, and the layout pattern of the components can be more complex.

[0017] Example 1

[0018] As shown in Figs. 1-2

[0019] ​The tap of the screw and cutting different direction includes handle 1, the front end of handle 1 is equipped with cutting part 2, specifically, handle 1 and cutting part 2 are integrally processed by a high-speed rigid material round bar, the front end of cutting part 2 is blade part 3, further, in order to gradually thread the preformed hole, ensure the processing stability and processing quality, the front end of blade part 3 is circular truncated cone, the side wall of blade part 3 is equipped with helical cutting edge 31 in the form of spiral, specifically, the direction of rotation of helical cutting edge 31 is right helical rising from the front end of blade part 3, then when processing, it is counterclockwise feeding (with the basis of looking from front to back); more specifically, helical cutting edge 31 is divided into front blade 311 and rear blade 312, front blade 311 directly participates in cutting material, and forms the main part of thread; rear blade 312 assists front blade 311 to complete cutting, and helps to discharge chip; further, three cutting grooves 5 in the form of circular array are arranged on the front end of blade part 3, the front end of each cutting groove 5 forms bottom cutting edge 32, which is used for cutting the bottom of the preformed hole, so as to ensure that the tap feeds smoothly; further, in order to facilitate chip removal and cutting guide, each cutting groove 5 is communicated with a right helical chip removal groove 4, the direction of rotation of chip removal groove 4 is consistent with the direction of rotation of helical cutting edge 31, the setting direction of cutting groove 5 and the setting direction of chip removal groove 4 form an angle of 15° in the vertical plane direction, and the groove depth of cutting groove 5 is greater than the groove depth of chip removal groove 4, the top of the two is smoothly arranged, the connection between cutting groove 5 and chip removal groove 4 forms an edge, that is, chip breaking edge 6, the chip breaking edge 6 is deviated, and the deviation of chip breaking edge 6 is left.

[0020] Through the scheme, the cutting groove 6 and the chip removal groove 4 in the form of spiral structure are arranged in a staggered manner, and the connection between the two forms an edge, that is, the chip breaking edge 6, and through the deviated arrangement of the chip breaking edge 6, the accumulation and adhesion caused by bottom cutting can be cut, the influence on cutting is effectively reduced, and the cutting efficiency and thread quality are ensured.

[0021] Embodiment 2

[0022] The structure of the tap of the right-handed left-cut type in embodiment 1 is the same, and the difference lies in that the direction of rotation of helical cutting edge 31 is left helical rising from the front end of blade part 3, the direction of rotation of chip removal groove 4 is also left, and the deviation of chip breaking edge 6 is right.

[0023] Through the scheme, the direction of rotation and the direction of cutting are changed at the same time, that is, the tap of the left-handed right-cut type is formed, which can thread in the clockwise direction when processing, and effectively expands the application range.

[0024] The working mode of the device is:

[0025] Before use, according to the desired tapping standard, select the tap with corresponding specification of cutting part 2, then the handle 1 is fixed in the existing equipment clamping seat, the pre-made hole on the workpiece is aligned with the cutting part 2, the existing equipment is started to make the helical cutting edge 2 begin to rotate counterclockwise, when the bottom cutting edge 32 is in contact with the pre-made hole and is extruded, the hole is expanded to the standard specification, continue to feed, the left edge of the helical front blade 311 begins to cut the side wall of the pre-made hole, the main part of the thread is processed by rotating cutting, the rear blade 312 assists the front blade 311 to complete the cutting, the above-mentioned cutting produces strip-shaped debris accumulated in the helical-shaped chip groove 6 and is discharged with rotation.

[0026] If the bottom debris is accumulated to a certain extent in the cutting groove 5 during tapping, the debris will be pushed to the travel route of the chip breaking blade 6, and then the accumulated debris is cut off with the rotation of the chip breaking blade 6, effectively solving the accumulation and adhesion of the debris, and the cut-off debris falls into the chip groove 4 and is discharged.

[0027] The above-mentioned embodiments only express the specific implementation of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the patent range of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection range of the present application.

Claims

1. A tap having a helix and a cutting direction that are different, characterized in that: The utility model relates to a cutting tool, including handle (1), the front end of handle (1) is equipped with cutting part (2), the spiral cutting edge (31) of spiral shape is seted up on the side wall of cutting part (2), the cutting groove (5) is seted up on the end of cutting part (2), the end of cutting groove (5) forms bottom cutting edge (32), the spiral discharge groove (4) of spiral shape is communicated on cutting groove (5), the direction of rotation of spiral discharge groove (4) is consistent with the direction of rotation of spiral cutting edge (31), the junction of cutting groove (5) and discharge groove (4) forms chip breaking edge (6), chip breaking edge (6) is deviated and sets up, the deviation of chip breaking edge (6) is opposite with the direction of rotation of discharge groove (4).

2. A tap having a helix and a cutting flute of opposite hand according to claim 1, wherein: The front end of the cutting part (2) is in the shape of a circular truncated cone.

3. A tap of the type having a helical and a cutting portion of opposite hand according to claim 1, characterized in that: The cutting groove (5) is arranged in a circumferential array.

4. A tap of the type having a helical and a cutting portion of opposite hand according to claim 1, characterized in that: The cross sections of the cutting groove (5) and the discharge groove (4) are both in the shape of an arc, and the depth of the cutting groove (5) is greater than the depth of the discharge groove (4).

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