Thin-walled tube internal thread machining apparatus

Abstract

The application discloses a kind of inner thread processing equipment of thin-walled pipe, including first support, rotating seat installed on first support, positioning seat for fixed outer tube, motor and cylinder, the output shaft of motor is connected with rotating seat by a shaft coupling, for driving rotating seat rotation, positioning seat can be slidably installed on a track, the piston rod of cylinder is connected with positioning seat, spring is connected with outer tube inner wall, form thread, one end of outer tube is embedded in the clamping jaw that second sleeve extends, a slot is opened on mandrel and located the junction of clamping portion and threaded portion, this slot is arranged along the axial direction of mandrel, and one end of this slot penetrates the first thread groove close to clamping portion, the depth ratio of slot and mandrel diameter is 1:5, the notch corresponding with slot is opened in the clamping jaw for clamping one end of outer tube.The application is convenient for processing, will not cause damage to outer tube, can also guarantee the precision of processing, guarantee that the pitch of obtained inner thread has good consistency.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of inner thread processing equipment of thin-walled pipe, belong to inner thread processing field. BACKGROUND

[0002] In minimally invasive surgery, due to internal tissue trauma, medical materials for treatment need to be placed at the trauma site, and a degradable nail is used to fix such degradable medical materials in the muscle tissue. During the operation, such nails need to be rotated out of a surgical gun containing multiple nails and into the human body. To ensure that the nails enter the designated position smoothly, the precision of the sleeve in the surgical gun is very high. Since the nail and the sleeve are fixed in the sleeve by threaded cooperation, the pitch inside the sleeve needs to be consistent.

[0003] In the prior art, the thread processing of the pipe is to fix the pipe opposite the threaded drill rod, so that the threaded drill rod enters the pipe under the drive of the power equipment to realize the drawing of the inner thread. However, due to the thin wall of the sleeve in medical devices, it is difficult to process an inner thread with high precision, which seriously affects the operation. SUMMARY

[0004] The purpose of the present application is to provide an inner thread processing equipment for thin-walled pipes, which is convenient to process and does not harm the outer pipe, and can ensure the precision of the processing and the consistency of the pitch of the obtained inner thread.

[0005] To achieve the above purpose, the technical solution adopted by the present application is as follows: an inner thread processing equipment for thin-walled pipes is used for processing threaded pipes, and the threaded pipe includes an outer pipe and a thread on the inner wall of the outer pipe.

[0006] The processing device includes a first support, a rotating seat mounted on the first support, a positioning seat for fixing the outer pipe, a motor, and a pneumatic cylinder. The output shaft of the motor is connected to the rotating seat through a shaft coupling for driving the rotating seat to rotate. The positioning seat is slidably mounted on a track, and the piston rod of the pneumatic cylinder is connected to the positioning seat for driving the positioning seat to move on the track.

[0007] A clamping jig is connected to the rotating seat, and the clamping jig further includes a mandrel, a first sleeve, a second sleeve, and a jaw. The first sleeve and the second sleeve are sequentially sleeved on the jaw, and one end of the jaw extends from the second sleeve.

[0008] The mandrel further includes a clamping portion and a threaded portion with a continuous threaded groove. The clamping portion is embedded in the jaw, and the threaded groove of the threaded portion is embedded with a spring. The central axis of the mandrel mounted on the rotating seat and the central axis of the outer pipe mounted on the positioning seat are located on the same straight line.

[0009] The outer sleeve of the threaded pipe 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 in the clamping jaw extending from the second sleeve;

[0010] A groove is formed on the mandrel at the connection between the clamping part and the threaded part, the groove is arranged in the axial direction of the mandrel, and one end of the groove penetrates the first thread groove close to the clamping part, the depth of the groove is 1:5 compared with the diameter of the mandrel, and the clamping jaw is provided with a notch corresponding to the groove for clamping one end of the outer pipe;

[0011] The positioning seat comprises a movable plate connected with the track and a mounting plate mounted on the movable plate, and the mounting plate is provided with a mounting groove for embedding one end of the outer pipe;

[0012] At least one side wall of the mounting groove is provided with a first positioning block, and the pipe wall of the outer pipe is provided with a plurality of first positioning grooves for embedding the first positioning block;

[0013] A second positioning groove is formed on the end face of the outer pipe close to the first positioning groove, and a second positioning block matched with the second positioning groove is arranged in the mounting groove.

[0014] The further improved scheme in the above technical solution is as follows:

[0015] 1. In the above scheme, the rotating seat is mounted on the first support through a bearing seat.

[0016] 2. In the above scheme, the threaded part has a head part at the end opposite to the clamping part.

[0017] 3. In the above scheme, the spring is connected with the inner wall of the outer pipe by laser welding.

[0018] Compared with the prior art, the application has the following advantages due to the use of the above technical solution:

[0019] 1. The inner thread machining equipment for thin-walled pipes connects the spring with the inner wall of the outer pipe, realizes the machining of threads on the thin and soft pipe wall, is convenient for machining and does not damage the outer pipe, can ensure the machining precision, and ensures that the pitch of the inner thread is good and consistent; and through the cooperation of the motor, the cylinder, the rotating seat and the positioning seat, the full automation of machining is basically realized, the spring is accurately placed in the outer pipe, manpower is saved, human errors and errors are avoided, and the machining precision is ensured.

[0020] 2、The invention is thin-walled pipe internal thread processing equipment, the mandrel and is located in the junction of the clamping part and thread part open a slot, the slot along the axial direction of the mandrel is arranged, and the slot one end penetrates the first thread groove near the clamping part, the setting of the slot, in the thread groove cutting off at the same time to the spring end face provides the stop face in the circumferential direction, so that each time processing, the position of the spring on the mandrel is completely consistent, and further, the thread obtained by processing has good consistency, further, the nail in the thread pipe will not make the nail fall off in advance, and the nail will not be stuck in the thread when it needs to fall off, guarantee the precision of the surgical equipment to the nail guide, provide protection for the success of the operation.

[0021] 3、The invention is thin-walled pipe internal thread processing equipment, the installation groove at least one side wall has a first positioning block, the outer tube wall is opened with several first positioning groove for the first positioning block is embedded;The end face of the outer tube end near the first positioning groove is opened with a second positioning groove, the second positioning groove is arranged in the installation groove and cooperates with the second positioning groove, the setting of the second positioning groove or the first positioning groove can position the clamping of the outer tube, ensure the consistency of the position of the outer tube in each processing process, so as to ensure the precision of processing, and the combination of two positioning grooves further prevents the rotation deviation of the outer tube in the circumferential direction during processing, which affects the precision, and further improves the precision of processing;Further, through the cooperation of the groove on the mandrel and the two grooves on the outer tube, the positioning precision of the spring on the mandrel and the outer tube during processing is ensured, especially the circumferential precision of the two, which further improves the position precision of the spring in the outer tube, that is, ensures the precision of the internal thread of the outer tube after processing and the consistency of the thread after multiple processing. BRIEF DESCRIPTION OF DRAWINGS

[0022] ATTACHMENT Figure 1 It is the structure schematic drawing of the invention thin-walled pipe internal thread processing equipment;

[0023] ATTACHMENT Figure 2 It is the structure schematic drawing of the invention thin-walled pipe internal thread processing equipment;

[0024] ATTACHMENT Figure 3 It is the structure schematic drawing of the invention thin-walled pipe internal thread processing equipment;

[0025] ATTACHMENT Figure 4 It is the structure schematic drawing of the invention thin-walled pipe internal thread processing equipment;

[0026] ATTACHMENT Figure 5 It is the structure schematic drawing of the invention thin-walled pipe internal thread processing equipment;

[0027] ATTACHMENT Figure 6Figure 1 is a partial structural sectional view of a thread pipe processed by the inner thread processing device for thin-wall pipe of the present application;

[0028] Figure 2 is a partial structural schematic view of a thread pipe processed by the inner thread processing device for thin-wall pipe of the present application. Figure 7

[0029] In the above figures: 1, mandrel; 101, clamping portion; 102, thread groove; 103, threaded portion; 104, end portion; 105, recess; 2, first sleeve; 3, second sleeve; 4, clamping jaw; 401, notch; 5, spring; 10, thread pipe; 11, outer pipe; 12, first positioning groove; 13, second positioning groove; 21, first support; 22, rotating seat; 23, positioning seat; 24, motor; 25, air cylinder; 26, track; 27, movable plate; 28, mounting plate; 29, mounting groove; 30, first positioning block; 31, second positioning block. DETAILED DESCRIPTION

[0030] The present patent can be further understood by the specific embodiments given below, which are not a limitation to the present patent.

[0031] Embodiment 1: An inner thread processing device for thin-wall pipe, used for processing a thread pipe 10, the thread pipe 10 comprising an outer pipe 11 and threads on the inner wall of the outer pipe 11;

[0032] The processing device comprises a first support 21, a rotating seat 22 mounted on the first support 21, a positioning seat 23 for fixing the outer pipe 11, a motor 24 and an air cylinder 25, the output shaft of the motor 24 being connected with the rotating seat 22 through a coupling for driving the rotating seat 22 to rotate, the positioning seat 23 being slidably mounted on a track 26, the piston rod of the air cylinder 25 being connected with the positioning seat 23 for driving the positioning seat 23 to move on the track 26;

[0033] A clamping fixture is connected on the rotating seat 22, the clamping fixture further comprising a mandrel 1, a first sleeve 2, a second sleeve 3 and a clamping jaw 4, the first sleeve 2 and the second sleeve 3 being successively sleeved on the clamping jaw 4, one end of the clamping jaw 4 extending out of the second sleeve 3, the area of the clamping jaw 4 in the first sleeve 2 being used for clamping the mandrel 1, and the area of the clamping jaw 4 extending out of the second sleeve 3 being used for clamping the outer pipe 11 of the thread pipe 10;

[0034] The mandrel 1 further comprises a clamping portion 101 and a threaded portion 103 with continuous thread grooves 102, the clamping portion 101 being embedded in the clamping jaw 4, and the thread grooves 102 of the threaded portion 103 being embedded with a spring 5, the central axis of the mandrel 1 mounted on the rotating seat 22 and the central axis of the outer pipe 11 mounted on the positioning seat 23 being on the same straight line;

[0035] ​The outer tube 11 of the threaded tube 10 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 in the clamping jaw 4 extending from the second sleeve 3;

[0036] A strip-shaped groove 105 is formed on the mandrel 1 at the joint of the clamping portion 101 and the threaded portion 103, the groove 105 is arranged along the axial direction of the mandrel 1, and one end of the groove 105 penetrates the first threaded groove 102 close to the clamping portion 101;

[0037] The positioning seat 23 comprises a movable plate 27 connected with the track 26 and a mounting plate 28 mounted on the movable plate 27, and the mounting plate 28 is provided with a mounting groove 29 for embedding one end of the outer tube 11;

[0038] At least one side wall of the mounting groove 29 is provided with a first positioning block 30, and the tube wall of the outer tube 11 is provided with a plurality of first positioning grooves 12 for embedding the first positioning block 30;

[0039] A second positioning groove 13 is formed on the end face of the outer tube 11 close to the first positioning groove 12, and the mounting groove 29 is provided with a second positioning block 31 matched with the second positioning groove 13.

[0040] The end of the clamping jaw 4 for clamping the outer tube 11 is provided with a notch 401 corresponding to the groove 105; the rotating seat 22 is mounted on the first support 21 through a bearing seat; and the spring 5 is connected with the inner wall of the outer tube 11 through laser welding.

[0041] Embodiment 2: A thin-walled tube internal thread processing device for processing a threaded tube 10, the threaded tube 10 comprising an outer tube 11 and a thread on the inner wall of the outer tube 11;

[0042] The processing device comprises a first support 21, a rotating seat 22 mounted on the first support 21, a positioning seat 23 for fixing the outer tube 11, a motor 24 and a pneumatic cylinder 25, the output shaft of the motor 24 is connected with the rotating seat 22 through a shaft coupling for driving the rotating seat 22 to rotate, the positioning seat 23 is slidably mounted on a track 26, and the piston rod of the pneumatic cylinder 25 is connected with the positioning seat 23 for driving the positioning seat 23 to move on the track 26;

[0043] The rotating seat 22 is connected with a clamping jig, and the clamping jig further comprises a mandrel 1, a first sleeve 2, a second sleeve 3 and a clamping jaw 4, the first sleeve 2 and the second sleeve 3 are sleeved on the clamping jaw 4 in sequence, one end of the clamping jaw 4 extends from the second sleeve 3, the area of the clamping jaw 4 in the first sleeve 2 is used for clamping the mandrel 1, and the area of the clamping jaw 4 extending from the second sleeve 3 is used for clamping the outer tube 11 of the threaded tube 10;

[0044] The mandrel 1 further comprises a clamping portion 101 embedded in the clamping jaw 4, and a threaded portion 103 with continuous threaded grooves 102 for embedding the spring 5, the mandrel 1 installed on the rotating seat 22 and the outer tube 11 installed on the positioning seat 23 have their respective central axes in the same straight line;

[0045] The outer tube 11 of the threaded tube 10 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 in the clamping jaw 4 extending from the second sleeve 3;

[0046] A groove 105 is formed on the mandrel 1 at the connection between the clamping portion 101 and the threaded portion 103, the groove 105 is arranged in the axial direction of the mandrel 1, and one end of the groove 105 penetrates the first threaded groove 102 close to the clamping portion 101;

[0047] The positioning seat 23 comprises a movable plate 27 connected with the track 26 and a mounting plate 28 installed on the movable plate 27, and the mounting plate 28 is provided with a mounting groove 29 for embedding one end of the outer tube 11;

[0048] At least one side wall of the mounting groove 29 is provided with a first positioning block 30, and the pipe wall of the outer tube 11 is provided with a plurality of first positioning grooves 12 for embedding the first positioning block 30;

[0049] A second positioning groove 13 is formed on the end face of the end of the outer tube 11 close to the first positioning groove 12, and the mounting groove 29 is provided with a second positioning block 31 matched with the second positioning groove 13.

[0050] The threaded grooves 102 are arranged at equal intervals; the depth of the groove 105 is 1:5 compared with the diameter of the mandrel 1; and the threaded portion 103 has an end head 104 at the end opposite to the clamping portion 101;

[0051] The spring 5 is connected with the inner wall of the outer tube 11 by laser welding; the number of the first positioning grooves 12 is three; and the second positioning groove 13 is an arc-shaped groove.

[0052] When the internal thread processing equipment of the thin-walled tube is used, the spring is connected with the inner wall of the outer tube, the purpose of processing the thread on the thin and soft tube wall is achieved, the processing is facilitated, the outer tube is not damaged, the processing precision is guaranteed, the pitch of the internal thread is consistent, the spring is accurately placed in the outer tube by the cooperation of the motor, the cylinder, the rotating seat and the positioning seat, the full automation of the processing is realized, the manpower is saved, the human error and the error are avoided, and the processing precision is guaranteed;

[0053] In addition, the recesses are arranged to provide a stop surface for the spring end face in the circumferential direction while cutting the thread groove, so that the position of the spring on the mandrel is consistent every time the machining is performed, and the thread obtained by machining has good consistency, and further, the nail in the threaded pipe will not be prematurely detached, and the nail will not be stuck in the thread when it needs to be detached, ensuring the accuracy of the nail guide of the surgical equipment and providing a guarantee for the success of the surgery.

[0054] In addition, the arrangement of the second positioning groove or the first positioning groove can position the outer tube during clamping, ensuring the consistency of the position of the outer tube during each machining process, thereby ensuring the machining accuracy, and the combined arrangement of the two positioning grooves further prevents the outer tube from rotating in the circumferential direction during machining, thereby affecting the accuracy, and further improves the machining accuracy.

[0055] Further, the arrangement of the recess on the mandrel and the two recesses on the outer tube ensures the positioning accuracy of the spring on the mandrel and the outer tube during machining, especially the circumferential accuracy of the two, thereby significantly improving the position accuracy of the spring in the outer tube, i.e., ensuring the accuracy of the thread in the outer tube after machining and the consistency of the thread after multiple machining.

[0056] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made in accordance with the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A device for machining internal threads on thin-walled tubes, characterized in that: For processing of threaded tubes (10), the threaded tubes (10) include an outer tube (11) and threads located on the inner wall of the outer tube (11); The processing equipment includes a first support (21), a rotating seat (22) mounted on the first support (21), a positioning seat (23) for fixing the outer tube (11), a motor (24) and a cylinder (25). The output shaft of the motor (24) is connected to the rotating seat (22) through a coupling to drive the rotating seat (22) to rotate. The positioning seat (23) is slidably mounted on a track (26). The piston rod of the cylinder (25) is connected to the positioning seat (23) to drive the positioning seat (23) to move on the track (26). A clamping fixture is connected to the rotating seat (22). The clamping fixture further includes a mandrel (1), a first sleeve (2), a second sleeve (3), and a jaw (4). The first sleeve (2) and the second sleeve (3) are sequentially fitted onto the jaw (4). One end of the jaw (4) extends out from the second sleeve (3). The mandrel (1) further includes a clamping part (101) and a threaded part (103) with continuous threaded grooves (102). The clamping part (101) is embedded in the jaw (4), and a spring (5) is embedded in the threaded groove (102) of the threaded part (103). The central axes of the mandrel (1) mounted on the rotating seat (22) and the outer tube (11) mounted on the positioning seat (23) are on the same straight line. The outer tube (11) of the threaded tube (10) is fitted onto the mandrel (1), the spring (5) is connected to the inner wall of the outer tube (11) to form a thread, and one end of the outer tube (11) is embedded in the jaw (4) extending from the second sleeve (3); A groove (105) is provided on the mandrel (1) at the connection between the clamping part (101) and the threaded part (103). The groove (105) is provided along the axial direction of the mandrel (1), and one end of the groove (105) passes through the first threaded groove (102) near the clamping part (101). The depth of the groove (105) is 1:5 to the diameter of the mandrel (1). The jaw (4) used to clamp the outer tube (11) has a notch (401) corresponding to the groove (105) at one end. The positioning seat (23) includes a movable plate (27) connected to the track (26) and a mounting plate (28) mounted on the movable plate (27). The mounting plate (28) has a mounting groove (29) for one end of the outer tube (11) to be inserted. At least one side wall of the mounting groove (29) has a first positioning block (30). The outer tube (11) has a plurality of first positioning grooves (12) for the first positioning block (30) to be inserted. A second positioning groove (13) is opened on the end face of the outer tube (11) near the first positioning groove (12). A second positioning block (31) that cooperates with the second positioning groove (13) is provided in the mounting groove (29).

2. The internal thread processing equipment for thin-walled tubes according to claim 1, characterized in that: The rotating seat (22) is mounted on the first bracket (21) via a bearing seat.

3. The internal thread processing equipment for thin-walled tubes according to claim 1, characterized in that: The threaded portion (103) has a head (104) at one end opposite to the clamping portion (101).

4. The internal thread processing equipment for thin-walled tubes according to claim 1, characterized in that: The spring (5) is connected to the inner wall of the outer tube (11) by laser welding.

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