Dresser for deep hole internal thread

An internal thread and dresser technology, applied in the field of hand tools, can solve the problems of inability to perform complete repair, easily damaged thread profile, low dressing efficiency, etc., and achieves the effect of ensuring reliability, ensuring consistency, and improving work efficiency

Active Publication Date: 2017-01-04
FACTORY 5721 OF PLA
5 Cites 11 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0003] At present, for the thread trimming of aircraft thread mating components, the method of scraping the internal and external thread profiles by forming tools is generally used, but this trimming method is not only easy to damage the thread profile, the quality is unstable, and the trimming efficiency is very low, especially For such as attached figure 1 In the shown air...
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Abstract

The invention provides a dresser for a deep hole internal thread and belongs to the technical field of hand tools. The dresser comprises a locating mandrel, a ferrule, a threaded cutter, a fixing seat, a fixing sleeve and a baffle, wherein the locating mandrel penetrates into an inner cavity of the fixing seat, and a tapered surface is arranged at the lower end of the locating mandrel; the ferrule is embedded into the inner cavity of the fixing seat; the threaded cutter comprises four groups of L-shaped blades, a cutting edge with a thread form consistent with that of the deep hole internal thread of a to-be-dressed aircraft part is arranged at the outer side end of the horizontal arm of each blade, a wedge-shaped arc surface is arranged on the vertical arm of the blade, the four groups of blades are evenly arranged around the locating mandrel, and the horizontal arms of the four groups of blades are assembled with the fixing seat; an operating handle is arranged at the upper end of the fixing seat, the fixing seat and the fixing sleeve are assembled in a threaded fit manner, the thread pitches of the fixing sleeve, the fixing seat and the deep hole internal thread of the to-be-dressed aircraft part are identical, and the fixing sleeve and the to-be-dressed aircraft part are assembled in a threaded fit manner. The dresser solves the problem about repair of the deep hole internal thread of the aircraft part and guarantees smooth assembly of threaded fit members in the maintenance process of the aircraft.

Technology Topic

EngineeringDeep hole +3

Image

  • Dresser for deep hole internal thread
  • Dresser for deep hole internal thread
  • Dresser for deep hole internal thread

Examples

  • Experimental program(1)

Example Embodiment

[0032] The present invention will be further described below in conjunction with the drawings and specific embodiments.
[0033] See figure 2 , image 3 , Figure 4 , The present invention is a deep hole internal thread dresser 2, which includes a positioning mandrel 2-2, a ferrule 2-6, a thread cutter 2-14, a fixing seat 2-12, a fixing sleeve 2-11 and a baffle 2 -15; The positioning mandrel 2-2 penetrates into the inner cavity of the fixed seat 2-12, and a conical surface 2-2-1 that matches the thread cutter 2-14 is provided at the lower end of the positioning mandrel 2-2; The baffle 2-15 is fixedly installed at the bottom of the fixed seat 2-12, and the baffle 2-15 is provided with a positioning spindle passing hole.
[0034] See figure 2 , image 3 , Figure 5 In the deep hole internal thread trimmer 2, the ferrule 2-6 is a stepped sleeve structure, which is embedded in the inner cavity of the fixed seat 2-12, and is locked and positioned by the locking nail 2-5, A vertical groove is arranged on the side wall of the large-diameter end sleeve of the ferrule.
[0035] See Picture 9 , Picture 10 , Picture 11 In the deep hole internal thread dresser 2, the upper end of the fixed seat 2-12 is provided with an operating handle 2-12-3, and the lower end is provided with four sets of tool accommodating grooves 2-12-1, the tool accommodating grooves 2 The cross section of -12-1 is a dovetail groove structure, and the outer wall of the fixed seat 2-12 is provided with a fixed seat external thread 2-12-2.
[0036] See Picture 12 , Figure 13 , Figure 14 In the deep hole internal thread dresser 2, the thread cutter 2-14 is composed of four sets of blades 2-14-1, and the four sets of blades 2-14-1 are all L-shaped structures; blade 2- The cross-section of the horizontal arm of 14-1 is a trapezoidal structure that matches the tool accommodating groove 2-12-1 of the dovetail structure, the blade 2-14-1 horizontal arm penetrates into the tool accommodating groove 2-12-1 of the dovetail structure, On the outer end of the blade horizontal arm, a cutting edge 2-14-3 with the same tooth profile as the deep hole internal thread 1-1 of the trimmed aircraft part 1 is provided, and a chip receiving groove 2-14 is provided at the cutting edge 2-14-3. -4; The vertical arm of the blade is provided with a wedge-shaped arc surface 2-14-2, and the wedge-shaped arc surface 2-14-2 of the vertical arm of the four sets of blades 2-14-1 is evenly arranged around the positioning mandrel.
[0037] See figure 2 , image 3 , Figure 8 In the deep hole internal thread trimmer 2, a fixed sleeve internal thread 2-11-1 is provided on the inner wall of the fixed sleeve 2-11, and the fixed sleeve internal thread 2-11-1 and the fixed seat external thread 2-12-2 Cooperate and assemble, the internal thread of the fixed sleeve 2-11-1 and the external thread of the fixed seat 2-12-2 have the same pitch as the deep hole internal thread 1-1 of the aircraft part 1 to be trimmed. 11 is provided with a fixed sleeve external thread 2-11-2 on the outer wall, and the fixed sleeve 2-11 is assembled with the trimmed aircraft part 1 through the outer fixed sleeve external thread 2-11-2.
[0038] See figure 2 , image 3 , Figure 4 In the deep hole internal thread trimmer 2, the positioning mandrel 2-2 is provided with a button 2-1 at the upper end, and the button 2-1 is assembled with the positioning mandrel 2-2 through a first pin 2-3 The middle and lower part of the positioning mandrel 2-2 is provided with a shoulder 2-2-2, a first compression spring 2-7 is provided between the sleeve 2-6 and the shoulder 2-2-2, the positioning The spindle 2-2 is further provided with a second pin 2-4, the second pin 2-4 and the first compression spring 2-7, and a vertical groove 2-6-1 provided on the ferrule 2-6 Cooperate to realize the locking positioning of the positioning spindle 2-2.
[0039] See figure 1 , figure 2 , image 3 , Image 6 , Figure 7 , The deep hole internal thread trimmer 2 of the present invention is also provided with a fixed sleeve locking mechanism, the fixed sleeve locking mechanism includes a screw sleeve 2-9, a sleeve 2-10, and a symmetrical arrangement of locking pin components 2-8 and the positioning sleeve 2-11-3 matched with the locking pin assembly; the threaded sleeve 2-9 is sleeved on the outside of the fixed seat 2-12 through a threaded fit, located above the fixed sleeve 2-11, on the screw The sleeve 2-9 is embedded with a sleeve 2-10 that cooperates with the locking pin assembly 2-8; the positioning sleeve 2-11-3 is embedded in the fixing sleeve 2-11; the locking pin assembly 2- 8 is provided with a pin 2-8-2, a locking handle 2-8-1 and a second compression spring 2-8-3; the upper end of the pin 2-8-2 is hinged to assemble the locking handle 2-8-1, The middle part of the pin 2-8-2 is provided with an annular flange 2-8-4, and the upper part of the pin 2-8-2 penetrates into the sleeve 2-10 embedded on the screw sleeve 2-9. A second compression spring 2-8-3 is installed between the top of 2-10 and the annular flange 2-8-4.
[0040] See Figure 1 to Figure 14 , The working process of the deep hole internal thread trimmer 2 of the present invention is:
[0041] 1. In the initial state, the second pin 2-4 of the positioning mandrel 2-2 is placed on the upper end surface of the ferrule 2-6, and the positioning mandrel is located at the top dead center position, arranged on the ferrule 2-6 and the shoulder 2- The first compression spring 2-7 between 2-2 is compressed, the blade return spring 2-13 is in a free state, and the four sets of blades 2-14-1 of the thread cutter 2-14 are retracted;
[0042] 2. Assemble the fixed sleeve 2-11 with the trimmed aircraft part 1 through the outer thread 2-11-2 of the outer fixed sleeve, pull up and slowly turn the button 2-1 forward to make the two ends of the second pin 2-4 fall into In the two vertical grooves 2-6-1 of the ferrule 2-6, the elastic force of the first compression spring 2-7 drives the positioning mandrel 2-2 to move downward, and the lower end conical surface of the positioning mandrel 2-2 2-1 Expand the four sets of blades 2-14-1 of the thread cutter 2-14, and at the same time, the thread cutter 2-14 penetrates to the bottom of the deep hole internal thread 1-1 of the aircraft part 1 to be trimmed;
[0043] 3. Slowly rotate the operating handle 2-12-3 in the opposite direction, so that the thread teeth of the blades of the four sets of blades 2-14-1 are matched with the internal thread 1-1 of the deep hole of the aircraft part 1 to be trimmed, and then slowly rotate the screw sleeve 2-9, align the locking pin assembly 2-8 in the fixed sleeve locking mechanism with the positioning sleeve 2-11-3 embedded in the fixed sleeve 2-11; then operate the locking pin assembly 2-8 to lock Tighten the handle 2-8-1, turn the locking handle 2-8-1 90° clockwise, and insert the pin 2-8-2 into the positioning sleeve 2-11-3 under the elastic force of the second compression spring 2-8-3 At this time, the screw sleeve 2-9, the fixed sleeve 2-11 and the trimmed aircraft part 1 are fixedly connected as a whole;
[0044] 4. Rotate the operating handle 2-12-3 on the fixed seat 2-12 counterclockwise to drive the fixed seat 2-12, positioning mandrel 2-2 and thread cutter 2-14 relative to the depth of the trimmed aircraft part 1. The inner thread 1-1 of the hole rotates in the reverse direction, and the deep hole inner thread 1-1 of the aircraft part 1 is repaired by the thread cutter 2-14;
[0045] 5. Repeat the above operation process until the deep hole internal thread 1-1 of the trimmed aircraft part 1 is completely repaired;
[0046] 6. Disassemble the deep hole internal thread trimmer 2 from the aircraft part 1 to be trimmed, and complete the trimming operation of the deep hole internal thread 1-1 of the aircraft part 1.

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