CN211939495U

CN211939495U - Clamping jig for high-precision laser welding

Info

Publication number: CN211939495U
Application number: CN201921983801.9U
Authority: CN
Inventors: 李建民; 沈远
Original assignee: Jiangsu Kesen Medical Devices Co ltd
Current assignee: Jiangsu Kesen Medical Devices Co ltd
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2020-11-17
Anticipated expiration: 2029-11-18

Abstract

The utility model discloses a high-precision clamping jig for laser welding, which is used for processing a screwed pipe, wherein the screwed pipe comprises an outer pipe and a thread positioned on the inner wall of the outer pipe; the processing jig comprises a mandrel, a first sleeve, a second sleeve and a clamping jaw, wherein the first sleeve and the second sleeve are sequentially sleeved on the clamping jaw, and one end of the clamping jaw extends out of the second sleeve; one end of the outer pipe is embedded into a chuck extending out of the second sleeve; a strip-shaped groove is formed in the mandrel and positioned at the joint of the clamping part and the threaded part, the groove is arranged along the axial direction of the mandrel, and one end of the groove penetrates through a first thread groove close to the clamping part; the clamping part of the mandrel is provided with an outer flange, and the outer flange is positioned at the end part of the clamping part close to the threaded part. The utility model discloses the clamping jaw is even in week, stable and can not press from both sides bad or cause the slope skew of outer tube to the centre gripping dynamics of outer tube to guarantee the concentricity of dabber, spring and outer tube, further guarantee the precision of processing.

Description

Clamping jig for high-precision laser welding

Technical Field

The utility model relates to a high-accuracy clamping tool for laser welding belongs to the interior thread machining field.

Background

In minimally invasive surgery, medical materials for treatment need to be placed at a wound site due to internal tissue trauma, while such degradable medical materials are fixed in muscle tissue using degradable nails. In the operation process, the nail needs to be screwed out of an operation gun provided with a plurality of nails to be driven into a human body, in order to ensure that the nail smoothly enters a designated position, the precision of a sleeve for placing the nail in the operation gun is required to be very high, and because the nail and the sleeve are fixed in the sleeve in a thread matching mode, the thread pitch inside the sleeve is required to be consistent, but because the pipe wall of the sleeve is thin, an internal thread with very high precision cannot be processed, the operation is seriously influenced, and therefore, how to develop the processing device with the high-precision internal thread sleeve becomes the research direction of technicians in the field.

Disclosure of Invention

The utility model aims at providing a clamping tool is used in high-accuracy laser welding, this clamping tool clamping jaw is used in high-accuracy laser welding evenly in week, stably and can not press from both sides the slope skew of bad or causing the outer tube to the centre gripping dynamics of outer tube to guarantee the concentricity of dabber, spring and outer tube, further guarantee the precision of processing.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a clamping jig for high-precision laser welding is used for machining a threaded pipe, wherein the threaded pipe comprises an outer pipe and threads positioned on the inner wall of the outer pipe;

the clamping jig comprises a mandrel, a first sleeve, a second sleeve and a clamping jaw, the first sleeve and the second sleeve are sequentially sleeved on the clamping jaw, and one end of the clamping jaw extends out of the second sleeve;

the mandrel further comprises a clamping part and a thread part continuously provided with a thread groove, the clamping part is embedded into the clamping jaw, and the thread groove of the thread part is used for embedding a spring;

the outer pipe of the thread groove is sleeved on the mandrel, the spring is connected with the inner wall of the outer pipe to form a thread, and one end of the outer pipe is embedded into the clamping jaw extending out of the second sleeve;

a strip-shaped groove is formed in the mandrel and positioned at the joint of the clamping part and the threaded part, the groove is arranged along the axial direction of the mandrel, and one end of the groove penetrates through a first thread groove close to the clamping part;

the clamping part of the mandrel is provided with an outer flange, and the outer flange is positioned at the end part of the clamping part close to the threaded part.

The further improved scheme in the technical scheme is as follows:

1. in the above aspect, the groove extends through the outer flange in the axial direction.

2. In the above scheme, the ratio of the depth of the groove to the diameter of the mandrel is 1: 3 to 6.

3. In the above scheme, one end of the clamping jaw for clamping the outer tube is provided with a notch corresponding to the groove.

4. In the above scheme, the thread grooves are arranged at equal intervals.

5. In the above scheme, one end of the thread part, which is opposite to the clamping part, is provided with an end head part.

6. In the above scheme, the spring is connected with the inner wall of the outer tube through laser welding.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage:

1. the utility model discloses clamping tool for high-precision laser welding, it with spring coupling on the outer tube inner wall, realized the purpose of processing the screw thread on not only thin but also soft pipe wall, both be convenient for process, can not produce the injury to the outer tube, can guarantee the precision of processing again, guarantee or internal screw thread pitch etc. have good uniformity.

2. The utility model discloses clamping tool for high-precision laser welding, its spindle just is located the junction of clamping part and screw thread portion and opens there is a bar recess, this recess sets up along the axial direction of dabber, and this recess one end runs through the first thread groove that is close to the clamping part, the setting of recess, provide the stop face in week for the spring end face when cutting off the thread groove, thereby make to add man-hour each time, the position of spring at the spindle is unanimous completely, and then make the screw thread that processing obtained have good uniformity, and further, make the nail in the threaded tube neither can drop in advance, can not make the nail throw away the card in the screw thread when needs drop yet, guarantee the precision of surgical equipment to the nail direction, provide the guarantee for the success of operation.

3. The utility model discloses clamping tool for high-precision laser welding has an outward flange on the clamping part of its dabber, the flange is located the tip that the clamping part is close to screw thread portion in addition, the setting of outward flange, when the clamping jaw carries out the centre gripping to the outer tube, a circumference supporting force in the opposite direction is provided for the clamping jaw is even in week to the centre gripping dynamics of outer tube, stable and can not press from both sides bad or cause the slope skew of outer tube, thereby guarantee the concentricity of dabber, spring and outer tube, further guarantee the precision of processing.

Drawings

FIG. 1 is a schematic structural view of a clamping jig for high-precision laser welding of the present invention;

FIG. 2 is a schematic view of a partial structure of the clamping jig for high precision laser welding of the present invention;

FIG. 3 is a schematic view of the structure of the central spindle of the clamping jig for high-precision laser welding of the present invention;

figure 4 is the utility model discloses high-accuracy is screwed pipe local structure cross-sectional view of clamping tool for laser welding.

In the above drawings: 1. a mandrel; 101. a clamping portion; 102. a thread groove; 103. a threaded portion; 104. an end portion; 105. a groove; 106. an outer flange; 2. a first sleeve; 3. a second sleeve; 4. a clamping jaw; 401. a notch; 5. a spring; 10. a threaded pipe; 11. an outer tube.

Detailed Description

In the description of this patent, it is noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The meaning of the above terms in this patent may be specifically understood by those of ordinary skill in the art.

Example 1: a clamping jig for high-precision laser welding is used for machining a threaded pipe 10, wherein the threaded pipe 10 comprises an outer pipe 11 and threads located on the inner wall of the outer pipe 11;

the clamping jig comprises a mandrel 1, a first sleeve 2, a second sleeve 3 and a clamping jaw 4, wherein the first sleeve 2 and the second sleeve 3 are sequentially sleeved on the clamping jaw 4, and one end of the clamping jaw 4 extends out of the second sleeve 3; the area of the clamping jaws 4 located in the first sleeve 2 is used for clamping the mandrel 1, and the area of the clamping jaws 4 extending from the second sleeve 3 is used for clamping the outer pipe 11 of the threaded pipe 10;

the mandrel 1 further comprises a clamping part 101 and a thread part 103 with a thread groove 102 continuously formed, the clamping part 101 is embedded into the clamping jaw 4, and the thread groove 102 of the thread part 103 is used for embedding a spring 5;

an outer tube 11 of the thread groove 102 is sleeved on the mandrel 1, the spring 5 is connected with the inner wall of the outer tube 11 to form a thread, and one end of the outer tube 11 is embedded into the clamping jaw 4 extending out of the second sleeve 3;

a strip-shaped groove 105 is formed in the mandrel 1 at the joint of the clamping part 101 and the threaded part 103, the groove 105 is arranged along the axial direction of the mandrel 1, and one end of the groove 105 penetrates through a first thread groove 102 close to the clamping part 101;

the clamping portion 101 of the mandrel 1 has an outer flange 106, and the flange 106 is located at the end of the clamping portion 101 close to the threaded portion 103.

The groove 105 extends through the outer flange 106 in the axial direction; the ratio of the depth of the groove 105 to the diameter of the mandrel 1 is 1: 4;

a notch 401 corresponding to the groove 105 is arranged at one end of the clamping jaw 4 used for clamping the outer tube 11; the screw grooves 102 are arranged at equal intervals.

Example 2: a clamping jig for high-precision laser welding is used for machining a threaded pipe 10, wherein the threaded pipe 10 comprises an outer pipe 11 and threads located on the inner wall of the outer pipe 11;

The ratio of the depth of the groove 105 to the diameter of the mandrel 1 is 1: 5; the end of the thread part 103 opposite to the clamping part 101 is provided with an end head part 104; the spring 5 is connected to the inner wall of the outer tube 11 by laser welding.

When the clamping jig for high-precision laser welding is adopted, the spring is connected to the inner wall of the outer pipe, so that the purpose of processing threads on the thin and soft pipe wall is realized, the processing is convenient, the outer pipe cannot be damaged, the processing precision can be ensured, and good consistency of the thread pitch of internal threads and the like is ensured;

in addition, the arrangement of the groove provides a circumferential stop surface for the end surface of the spring while cutting off the thread groove, so that the position of the spring on the mandrel is completely consistent during each processing, the processed thread has good consistency, further, a nail in the threaded pipe cannot fall off in advance, and the nail cannot be thrown and clamped in the thread when needing to fall off, thereby ensuring the guiding precision of the nail by surgical equipment and providing guarantee for the success of the surgery;

in addition, the arrangement of the outer flange provides a circumferential supporting acting force in the opposite direction when the clamping jaw clamps the outer pipe, so that the clamping force of the clamping jaw on the outer pipe is uniform and stable in the circumferential direction and cannot be damaged by clamping or cause the inclined deviation of the outer pipe, the concentricity of the mandrel, the spring and the outer pipe is ensured, and the processing precision is further ensured.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides a high accuracy is clamping tool for laser welding which characterized in that: the method is used for machining a threaded pipe (10), wherein the threaded pipe (10) comprises an outer pipe (11) and threads located on the inner wall of the outer pipe (11);

the clamping jig comprises a mandrel (1), a first sleeve (2), a second sleeve (3) and a clamping jaw (4), wherein the first sleeve (2) and the second sleeve (3) are sequentially sleeved on the clamping jaw (4), and one end of the clamping jaw (4) extends out of the second sleeve (3);

the mandrel (1) further comprises a clamping part (101) and a threaded part (103) with a threaded groove (102) continuously, the clamping part (101) is embedded into the clamping jaw (4), and the threaded groove (102) of the threaded part (103) is used for embedding a spring (5);

an outer pipe (11) of the thread groove (102) is sleeved on the mandrel (1), the spring (5) is connected with the inner wall of the outer pipe (11) to form a thread, and one end of the outer pipe (11) is embedded into a clamping jaw (4) extending out of the second sleeve (3);

a strip-shaped groove (105) is formed in the mandrel (1) and is positioned at the joint of the clamping part (101) and the threaded part (103), the groove (105) is arranged along the axial direction of the mandrel (1), and one end of the groove (105) penetrates through a first thread groove (102) close to the clamping part (101);

an outer flange (106) is arranged on the clamping part (101) of the mandrel (1), and the outer flange (106) is positioned at the end part, close to the threaded part (103), of the clamping part (101).

2. The clamping jig for high-precision laser welding according to claim 1, characterized in that: the recess (105) extends through the outer flange (106) in the axial direction.

3. The clamping jig for high-precision laser welding according to claim 1, characterized in that: the ratio of the depth of the groove (105) to the diameter of the mandrel (1) is 1: 3 to 6.

4. The clamping jig for high-precision laser welding according to claim 1, characterized in that: one end of the clamping jaw (4) used for clamping the outer tube (11) is provided with a notch (401) corresponding to the groove (105).

5. The clamping jig for high-precision laser welding according to claim 1, characterized in that: the thread grooves (102) are arranged at equal intervals.

6. The clamping jig for high-precision laser welding according to claim 1, characterized in that: one end of the threaded part (103), which is opposite to the clamping part (101), is provided with an end head part (104).

7. The clamping jig for high-precision laser welding according to claim 1, characterized in that: the spring (5) is connected with the inner wall of the outer tube (11) through laser welding.