Variable pitch flexible die set

Abstract

The present application provides a flexible die sleeve with variable pitch, comprising a die sleeve body, which is a cylindrical sleeve; a floating sleeve movably installed in the upper half of the die sleeve body; floating grooves opened on both sides of the floating sleeve; limiting screws threadedly installed on both sides of the die sleeve body and abutting against the bottom of the floating grooves; an adjusting spring installed in the die sleeve body below the floating grooves; a die body embedded in the floating sleeve; a tap for tapping through the die hole in the middle of the die body; and a passive cleaning and cooling device installed on the side of the die sleeve body through the insertion holes obliquely opened on the lower part of the outer side of the die sleeve body. The present application can replace the die body according to the actual pitch, and then realize the thread tapping of the tap through the flexible adjustment of the floating sleeve by the limiting screws and the adjusting spring, so as to achieve the processing of different pitches, and the structure is simple and the application range is wide.

Description

Technical Field

[0001] This invention relates to a machining apparatus, particularly for thread machining, and especially to a flexible die sleeve with variable pitch. Background Technology

[0002] In industries such as equipment maintenance, machining, and machinery manufacturing, it is often necessary to machine external threads or internal threads on the workpiece body. However, when the pitches of the internal and external threads on the workpiece body are different, they need to be machined separately, which presents problems such as inconvenience in machining and difficulty in ensuring accuracy. For machining parts with internal thread pitch smaller than external thread pitch, the traditional machining method is to machine the internal and external threads with different pitches separately. This requires repeated clamping of the workpiece, which is not only inefficient but also makes it difficult to control the machining accuracy.

[0003] Patent application number CN201920057572.1 discloses a die sleeve comprising a fixed sleeve, a movable sleeve, a die, a first set screw, and a second set screw. The fixed sleeve consists of a cylindrical structure and a conical structure. The cylindrical structure has a blind hole inside and a keyway extending to the blind hole on the outside. The movable sleeve is also cylindrical, with a through hole inside and a boss at one end. The boss has a stepped hole inside that matches the outer diameter of the die, and a threaded hole extending radially to the stepped hole. A threaded hole is also provided at the end of the movable sleeve. The movable sleeve is fitted into the inner hole of the fixed sleeve and positioned by the second set screw. The die is placed in the corresponding stepped hole of the movable sleeve and fixed by the first set screw. This invention can be used to process external threads on parts with larger diameters. It has a simple structure, is easy to operate, ensures product processing quality, and improves processing efficiency.

[0004] Although the aforementioned patent can process external threads on parts with larger diameters, it cannot be adjusted according to different thread pitches. When threading, the thread pitch can easily cause jamming, affecting the processing. Summary of the Invention

[0005] In order to solve the technical problems mentioned in the background art, the present invention provides a flexible plate sleeve with variable pitch.

[0006] The technical solution of the present invention is as follows: a flexible die sleeve with variable pitch, comprising a die sleeve body, the die sleeve body being a cylindrical sleeve, a floating sleeve being movably installed in the upper half of the die sleeve body, floating grooves being opened on both sides of the floating sleeve, limit screws being threadedly installed on both sides of the die sleeve body, two of the limit screws passing through both sides of the die sleeve body and abutting against the bottom of the floating groove, an adjusting spring being installed in the die sleeve body, the adjusting spring being located in the die sleeve body below the floating groove, a die body being embedded in the floating sleeve, a tap being tapped through the die hole in the middle of the die body, a plurality of insertion holes being obliquely opened on the lower outer side of the die sleeve body, and a passive cleaning and cooling device being installed on the side of the die sleeve body through the plurality of insertion holes.

[0007] Preferably, the passive cleaning and cooling device includes a shaft, a fan sleeve, and fan blades. The shaft is inserted into a hole, and the fan sleeve is integrally formed on the outer end of the shaft. The shaft is a hollow shaft, and its inner hole extends into the fan sleeve. A support frame is installed at the air inlet on the surface of the fan sleeve. A rotating shaft is installed at the inner axis of the fan sleeve via the support frame. The fan blades are movably mounted on the rotating shaft, and the fan blades achieve passive rotation through the tapping and rotation of the die sleeve body.

[0008] Preferably, all of the aforementioned insertion holes are tilted upward toward the floating sleeve, and the air sleeve ventilates from the inlet air to the die body inside the die sleeve body through the fan blades.

[0009] Preferably, the length of the two floating grooves along the axial direction of the floating sleeve is greater than the outer diameter of the limiting screw.

[0010] Preferably, the air inlets of the air jackets of several of the passive cleaning and cooling devices are directed to the opposite direction of the rotation of the die sleeve body.

[0011] Preferably, there are at least two passive cleaning and cooling devices, which are installed symmetrically on both sides of the die sleeve body at 180°.

[0012] Preferably, the lower outer side of the die sleeve body also has two chip removal holes.

[0013] Preferably, the lower end of the die sleeve body is integrally formed with a mounting post, the mounting post is a hollow post, and keyways are symmetrically opened on both sides inside the mounting post. The die sleeve body is fixedly installed on the active rotating device through the mounting post and the two keyways.

[0014] The beneficial effects of using the present invention are:

[0015] 1. When tapping, this invention can replace the die body according to the actual pitch. The floating sleeve is flexibly adjusted by the limit screw and the adjusting spring to achieve thread tapping. In use, this invention can be directly installed on the rotating section of the motor or the rotating spindle of the lathe by using a flat key. After the tap spindle is installed, the motor or lathe or other active rotating equipment is turned on to feed the tap spindle. After the tap spindle is inserted into the die hole, the floating sleeve is pressed by the external thread pitch of the tap spindle. The floating sleeve is adjusted by the adjusting spring to achieve the vertical position of the external thread of the tap spindle, thereby achieving the processing of different pitches. The structure is simple and the application range is wide.

[0016] 2. The present invention adds several passive cleaning and cooling devices to the outside of the die sleeve body. The wind resistance on the side of the rotating die sleeve body drives the fan blades to rotate and draw in air, thereby achieving the blowing and cooling of the inner cavity of the die sleeve body. This simplifies the structure, reduces costs, and is easy to use. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a perspective view of an embodiment of the present invention;

[0019] Figure 2 This is a cross-sectional view of an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the passive cleaning and cooling device in an embodiment of the present invention;

[0021] The embodiments of this invention mainly include the following component symbols:

[0022] Die sleeve body-1, insertion hole-11, chip removal hole-12, mounting post-13, keyway-14, floating sleeve-2, floating groove-21, limit screw-3, die body-4, die hole-41, adjusting spring-5, passive cleaning and cooling device-6, insertion shaft-61, fan sleeve-62, support frame-63, rotating shaft-64, fan blade-65. Detailed Implementation

[0023] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0024] Example 1

[0025] like Figure 1 and Figure 2 As shown, a flexible die sleeve with variable pitch includes a die sleeve body 1, which is a cylindrical sleeve. A floating sleeve 2 is movably installed in the upper half of the die sleeve body 1. Floating grooves 21 are opened on both sides of the floating sleeve 2. Limiting screws 3 are threaded on both sides of the die sleeve body 1. The two limiting screws 3 pass through the two sides of the die sleeve body 1 and abut against the bottom of the floating grooves 21. An adjusting spring 5 is installed inside the die sleeve body 1. The adjusting spring 5 is located inside the die sleeve body 1 below the floating grooves 21. A die body 4 is embedded in the floating sleeve 2. A tap is tapped through the die hole 41 in the middle of the die body 4. Several insertion holes 11 are opened obliquely on the lower outer side of the die sleeve body 1. A passive cleaning and cooling device 6 is installed on the side of the die sleeve body 1 through several insertion holes 11.

[0026] like Figure 3 As shown, the passive cleaning and cooling device 6 includes a shaft 61, a fan sleeve 62, and a fan blade 65. The shaft 61 is inserted into the insertion hole 11. The fan sleeve 62 is integrally formed on the outer end of the shaft 61. The shaft 61 is a hollow shaft, and the inner hole of the shaft 61 extends into the fan sleeve 62. A support frame 63 is installed at the air inlet on the surface of the fan sleeve 62. A rotating shaft 64 is installed at the inner axis of the fan sleeve 62 through the support frame 63. The fan blade 65 is movably mounted on the rotating shaft 64. The fan blade 65 achieves passive rotation through the tapping and rotation of the die sleeve body 1.

[0027] The present invention adds several passive cleaning and cooling devices 6 to the outside of the die sleeve body 1. The fan blades 65 are driven to rotate and draw in air by the wind resistance on the side of the rotating die sleeve body 1, thereby achieving the blowing and cooling of the inner cavity of the die sleeve body 1. The structure is simplified while reducing the cost and is easy to use.

[0028] Several of the aforementioned insertion holes 11 are inclined upward toward the floating sleeve 2, and the air sleeve 62 ventilates from the inlet air to the inner plate tooth body 4 of the plate tooth sleeve body 1 through the fan blades 65.

[0029] When tapping, this invention allows for the replacement of the die body 4 according to the actual thread pitch. The floating sleeve 2 is then flexibly adjusted via the limiting screw 3 and adjusting spring 5 to achieve thread tapping. In use, the invention can be directly mounted on the rotating section of a motor or the rotating spindle of a lathe using a flat key. After installing the tap spindle, the motor or lathe is turned on to feed the tap spindle. Once the tap spindle is inserted into the die hole 41, the floating sleeve 2 is pressed against the external thread pitch of the tap spindle, causing the floating sleeve 2 to adjust with the adjusting spring 5. This ensures the vertical position of the external thread of the tap spindle, enabling processing of different thread pitches. The structure is simple and has a wide range of applications.

[0030] The length of the two floating grooves 21 along the axial direction of the floating sleeve 2 is greater than the outer diameter of the limiting screw 3, which facilitates the floating sleeve 2 to float and adjust along the axial direction.

[0031] The air inlets of the air sleeves 62 of the passive cleaning and cooling devices 6 are directed in the opposite direction of the rotation of the die sleeve body 1 to provide passive rotational force to the passive cleaning and cooling devices 6, thereby achieving the blowing out, cleaning and cooling of iron filings at the die hole 41.

[0032] The passive cleaning and cooling devices 6 are at least two in number, respectively installed on both sides of the die sleeve body 1 in a 180° symmetrical manner to maintain the counterweight balance when the die sleeve body 1 rotates.

[0033] Two chip removal holes 12 are also opened on the lower outer side of the die sleeve body 1 to remove some of the unblown iron chips and prevent the iron chips from accumulating and clogging the adjusting spring 5.

[0034] The lower end of the die sleeve body 1 is integrally formed with a mounting post 13. The mounting post 13 is a hollow post, and keyways 14 are symmetrically opened on both sides inside the mounting post 13. The die sleeve body 1 is fixedly installed on the active rotating device through the mounting post 13 and the two keyways 14.

[0035] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A flexible die set with variable pitch, comprising a die set body, the die set body being a cylindrical sleeve, characterized in that: The floating sleeve is movably installed in the upper half of the die sleeve body, floating grooves are formed in the two sides of the floating sleeve, limiting screws are threadedly installed on the two sides of the die sleeve body, the two limiting screws are respectively arranged on the two sides of the die sleeve body and abut against the groove bottoms of the floating grooves, adjusting springs are installed in the die sleeve body and located below the floating grooves, die bodies are embedded in the floating sleeve, taps are screwed through the die holes in the middle of the die bodies, a plurality of insertion holes are obliquely formed in the lower part of the outer side of the die sleeve body, passive cleaning and cooling devices are installed on the side of the die sleeve body through the insertion holes, the passive cleaning and cooling devices comprise insertion shafts, air sleeves and fan leaves, the insertion shafts are inserted into the insertion holes, the air sleeves are integrally formed on the outer ends of the insertion shafts, the insertion shafts are hollow shafts, the insertion shaft holes are communicated with the air sleeves, support frames are installed on the air inlet of the air sleeve surface, rotating shafts are installed on the air shaft centers through the support frames, the fan leaves are movably installed on the rotating shafts, the fan leaves are passively rotated through the die sleeve body tapping rotation, the plurality of insertion holes are all upwardly inclined towards the floating sleeve, the air sleeves are ventilated from the air inlets to the die bodies in the die sleeve body through the fan leaves, the air inlets of the air sleeves of the plurality of passive cleaning and cooling devices are in the air inlet direction of the die sleeve body.

2. The variable-pitch flexible die set of claim 1, wherein: The plurality of passive cleaning and cooling devices are at least two and symmetrically arranged on the two sides of the die sleeve body.

3. The variable pitch flexible die set of claim 2, wherein: Two chip removal holes are further formed in the lower part of the outer side of the die sleeve body.

4. The variable pitch flexible die set of claim 3, wherein: An installation column is integrally formed on the lower end of the die sleeve body, the installation column is a hollow column, key grooves are symmetrically formed in the two sides of the installation column, and the die sleeve body is fixedly installed on the active rotating device through the installation column and the two key grooves.

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