Needle positioning method

Abstract

The invention relates to a processing positioning method, in particular to a needle positioning method, which comprises the following steps of: placing a rod part of a needle in a groove of a base to realize coaxial positioning; the first clamping arm and the second clamping arm move from the direction of the support frame to the direction of the base, so that the first end part and the second end part are closed in a clamping area between the base and the support frame; the first end part and the second end part are separated, and then the bending part is sent to the position between the first end part and the second end part, so that the bending part is clamped by the first end part and the second end part together, and the bending part is positioned around the axial angle; the rod part is clamped on the base through the locking block, the positioning of the needle is kept, then the first clamping arm and the second clamping arm retreat, the first end part and the second end part are separated again, and the bent part is exposed. By means of the structure, primary positioning of the regular rod part can be achieved through the groove of the base, secondary positioning is conducted through the first clamping arm and the second clamping arm, efficiency is high, and positioning is accurate.

Description

Technical Field

[0001] The invention relates to a processing positioning method, in particular to a needle positioning method. Background Art

[0002] The description in this section merely provides background information related to the present disclosure and does not constitute prior art.

[0003] A needle structure is often used in medical devices or precision instruments. The main part of the needle structure is set to a regular cylindrical needle tube shape, but it is also connected to a part of a special-shaped body, such as a special-shaped turning part and other structures. Usually, the special-shaped part structure also needs to undergo special processing through repeated processes. Its positioning is relatively complicated and requires precise positioning from multiple angles and directions, which is a difficult problem in the processing and production links.

[0004] In the existing needle positioning, it is usually necessary to open a separate mold for positioning, which is too costly and is not convenient for the next step of processing after positioning. At the same time, some existing needle positioning methods use non-fixed molds, but because they need to be fixed at multiple angles, their positioning accuracy, especially for special-shaped turning parts, is difficult to achieve high-precision positioning, which seriously affects the subsequent processing effect.

[0005] Currently, there is no needle positioning method that can solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a needle positioning method, which can realize the preliminary positioning of the regular rod part through the groove of the base, and then perform secondary positioning through the first clamping arm and the second clamping arm, with high efficiency and accurate positioning.

[0007] In order to achieve the above object, the present invention discloses the following needle positioning method, which is used to position the needle, wherein the needle comprises a rod portion and a bent portion disposed at one end of the rod portion and bent along a direction that is not parallel to the extension direction of the rod portion; wherein the needle positioning method comprises:

[0008] placing the shaft of the needle in the groove of the base so that the shaft is coaxially positioned with the axial direction;

[0009] The first clamp arm and the second clamp arm move from the support frame direction toward the base direction until the first clamp arm for clamping the first end of the bent portion and the second clamp arm for clamping the second end of the bent portion are closed in the clamping area between the base and the support frame, and at this time, the first end and the second end are in contact with each other;

[0010] The first end and the second end are separated, and then the rod slides in the groove along the axial direction toward the clamping area until the bent portion is sent to a position between the first end and the second end, and the first end and the second end are closed again, so that the bent portion is clamped by the first end and the second end, so that the angle of the bent portion around the axial direction is positioned;

[0011] The rod is clamped on the base by a locking block to keep the needle in position, and then the first clamp arm and the second clamp arm are retracted to separate the first end and the second end again, so that the bent portion is exposed;

[0012] The exposed bent portion is processed.

[0013] Further, in the step of "the first end and the second end are closed again so that the bending portion is clamped by the first end and the second end together, so that the angle of the bending portion around the axial direction is positioned", when the first end and the second end clamp the bending portion together, the first clamping arm and the second clamping arm are just limited by the first protrusion protruding toward one end of the base by the support frame, so that the bending portion has a preset angle around the axial direction when it is clamped by the first end and the second end.

[0014] Furthermore, after the step of "the first end and the second end are closed again, so that the bending portion is clamped by the first end and the second end, so that the bending portion is positioned around the axial angle", and before "the rod is clamped on the base by a locking block to keep the needle positioned, and then the first clamp arm and the second clamp arm are retracted to separate the first end and the second end again to expose the bending portion", the first clamp arm and the second clamp arm are respectively limited by the second protrusion of the base protruding toward one end of the support frame, so that the position of the bending portion along the axial direction is positioned when it is clamped by the first end and the second end.

[0015] Further, in the step of "the first end and the second end are closed again so that the bending portion is clamped by the first end and the second end so that the bending portion is positioned around the axial angle", at least part of the first end and the second end just abut against each other.

[0016] Further, in the step of "at least part of the first end and the second end are exactly in contact with each other", a clearance cavity for accommodating the bent portion is formed between at least part of the first end and the second end.

[0017] Furthermore, the size of the give-way cavity matches the size of the bent portion, and in the step of "the first end and the second end are closed again, so that the bent portion is clamped by the first end and the second end so that the bent portion is positioned around the axial angle", the position where the bent portion contacts the first end and the second end is set at the give-way cavity.

[0018] Further, in the step of "clamping the rod on the base by a locking block to maintain the positioning of the needle", the locking block is arranged to avoid the position of the clamping area.

[0019] Furthermore, the locking block is in contact with at least a portion of the rod and the base, so that the locking block, the base, the rod and the bent portion are fixed to each other.

[0020] By means of the above technical solution, the beneficial effects of the present invention are as follows:

[0021] 1. The needle positioning method of the present invention can first perform preliminary positioning of the needle rod through the groove of the base, and then achieve secondary positioning by clamping the bent portion with the first clamp arm and the second clamp arm, and then lock it with the locking block, and withdraw the first clamp arm and the second clamp arm to achieve multi-angle positioning and processing of the bent portion. The above process can be completed only by the same device, maintaining a high positioning accuracy and positioning efficiency on the basis of limited cost.

[0022] 2. In the needle positioning method of the present invention, after the first clamp arm and the second clamp arm clamp the bent portion of the needle to achieve angle positioning, the first clamp arm and the second clamp arm are also limited by the second protrusion that protrudes toward one end of the support frame of the base, thereby achieving the positioning of the needle in the axial position and significantly improving the positioning accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 It is a three-dimensional schematic diagram of a positioning fixture of a needle positioning method provided in an embodiment of this specification;

[0025] Figure 2 It is a three-dimensional schematic diagram from another angle of a positioning fixture of a needle positioning method provided in an embodiment of this specification;

[0026] Figure 3It is a schematic diagram of the internal structure of a needle positioning method provided in an embodiment of this specification;

[0027] Figure 4 is a needle schematic diagram of a needle positioning method provided in an embodiment of this specification;

[0028] In the figure: 100, needle; 101, rod; 102, bending portion; 1, first clamping arm; 11, first end; 2, second clamping arm; 21, second end; 3, base; 31, groove; 32, second protrusion; 4, support frame; 41, first protrusion; 42, slide groove; 5, slider; 51, limit pin; 6, locking block. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification.

[0030] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "upper", "middle", "lower", "inner", "outer", "front", "back", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. The terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following describes an implementation method of the present invention based on its overall structure.

[0031] See also Figure 1-4 , which is a needle positioning method of this embodiment, by Figure 1-3 The needle positioning fixture shown is used for positioning, wherein the needle 100 includes a rod 101 and a bent portion 102 disposed at one end of the rod 101 and bent along a direction that is not parallel to the extension direction of the rod 101; the needle positioning fixture includes:

[0032] A base 3 having an axially extending groove 31, the size of which matches the rod 101;

[0033] A support frame 4, the support frame 4 is arranged on one side of the base 3;

[0034] The first clamp arm 1 and the second clamp arm 2 are movably connected to both sides of the support frame 4. The first clamp arm 1 includes a first end 11 for clamping the bent portion 102, and the second clamp arm 2 includes a second end 21 for clamping the bent portion 102.

[0035] Among them, there is a clamping area between the base 3 and the support frame 4, which includes a yielding bent portion 102, a first end portion 11 and a second end portion 21;

[0036] The first clamp arm 1 and the second clamp arm 2 are rotatably connected to the slider 5. The support frame 4 is provided with a slide groove 42 extending along the axial direction and matching with the slider 5. The slider 5 is slidably connected to the slide groove 42.

[0037] The first end 11 and the second end 21 are arranged opposite to each other, and a first elastic component is provided between the first clamp arm 1 and the slider, and a second elastic component is provided between the second clamp arm 2 and the slider 5, so that when the slider 5 slides to a preset position, the first end 11 and the second end 21 abut against each other in the clamping area;

[0038] When the needle 100 is fixed, it also includes a locking block 6 which is sleeved on the base 3 and is used to fix the needle 100 and the base 3 to each other.

[0039] By means of the above mechanism, in this embodiment, the needle 100 is positioned by the following method, the steps comprising:

[0040] Place the shaft 101 of the needle 100 in the groove 31 of the base 3 so that the shaft 101 is coaxially positioned with the axial direction;

[0041] The first clamp arm 1 and the second clamp arm 2 move from the support frame 4 to the base 3 until the first end 11 of the first clamp arm 1 for clamping the bent portion 102 and the second end 21 of the second clamp arm 2 for clamping the bent portion 102 are closed in the clamping area between the base 3 and the support frame 4, at which time, the first end 11 and the second end 21 are in contact with each other;

[0042] The first end 11 and the second end 21 are separated, and then the rod 101 slides in the groove 31 along the axial direction toward the clamping area until the bent portion 102 is sent to a position between the first end 11 and the second end 21, and the first end 11 and the second end 21 are closed again, so that the bent portion 102 is clamped by the first end 11 and the second end 21, so that the angle of the bent portion 102 around the axial direction is positioned;

[0043] The rod 101 is clamped on the base 3 by the locking block 6 to keep the needle 100 in position, and then the first clamp arm 1 and the second clamp arm 2 are retracted to separate the first end 11 and the second end 21 again, so that the bent portion 102 is exposed;

[0044] The exposed bent portion 102 is processed.

[0045] In the above process, the rod 101 of the needle 100 with a regular extension direction is first preliminarily placed on the groove 31 of the base 3, and at least part of the rod 101 is embedded in the groove 31 of the base 3, so that the rod 101 is positioned coaxially with the axial direction through the groove. Then, the slider 5 is driven to move toward the clamping area, so that the first clamp arm 1 and the second clamp arm 2 also move toward the clamping area at the same time.

[0046] During the initial movement process, the first end 11 of the first clamp arm 1 is limited by the side wall of the slider 5 on the side where the first clamp arm 1 is connected, so that the first clamp arm 1 cannot rotate. Until the first end 11 of the first clamp arm 1 moves to the clamping area, the side wall limitation of the slider 5 disappears. Since the side of the first clamp arm 1 away from the first end 11 is provided with a first elastic mechanism connected to the slider 5 and in a tense state, the middle position of the first clamp arm 1 is rotatably connected to the slider 5. At this time, the elastic force of the first elastic mechanism is released, and the rotating shaft at the middle position of the first clamp arm 1 rotates relative to the slider 5. The first clamp arm 1 rotates with the middle position as the center of rotation, so that the first end 11 of the first clamp arm 1, as one end of the rotation, moves toward the clamping area until the first end 11 contacts the first protrusion 41 at one end of the support frame 4, and the first end 11 is limited by the first protrusion 41. Similarly, the second end 21 of the second clamp arm 2 is limited by the side wall of the slider 5 on the side where the second clamp arm 2 is connected, so that the second clamp arm 2 cannot rotate until the second end 21 of the second clamp arm 2 moves to the clamping area, and the side wall limitation of the slider 5 disappears. Since the side of the second clamp arm 2 away from the second end 21 is provided with a second elastic mechanism connected to the slider 5 and in a tense state, the middle position of the second clamp arm 2 is rotatably connected to the slider 5. At this time, the elastic force of the second elastic mechanism is released, and the rotating shaft at the middle position of the second clamp arm 2 rotates relative to the slider 5. The second clamp arm 2 rotates with the middle position as the center of rotation, so that the second end 21 of the second clamp arm 2 moves toward the clamping area as one end of the rotation until the second end 21 contacts the first protrusion 41 at one end of the support frame 4. At this time, the first end 11 and the second end 21 are both limited by the first protrusion 41.

[0047] Then, driven by external force, by controlling the first clamp arm 1 and the second clamp arm 2, the first end 11 and the second end 21 are slightly separated, so that a space for accommodating the bent portion 102 is made between the first end 11 and the second end 21, and the needle 100 can be pushed axially to make the rod 101 of the needle 100 slide on the groove 31 until the bent portion 102 is placed at the preset position of the first end 11 and the second end 21, and the first end 11 and the second end 21 can be closed again. During the closing process of the first end 11 and the second end 21, the inner side surface of the first end 11 may contact the side of the bent portion 102 facing the first end 11, and the inner side surface of the second end 21 may contact the side of the bent portion 102 facing the second end 21, so that the bent portion 102 rotates under the left and right thrusts, and finally the bent portion 102 rotates to a specified angle. At this time, the needle 100 is positioned along the angle around the axial direction.

[0048] Then, the slider 5 drives the first clamp arm 1 and the second clamp arm 2 to slightly displace along the axial direction, so that the side wall of the first end 11 and the second end 21 facing the base 3 abuts against the second protrusion 32 protruding on one side of the base 3 facing the first end 11 and the second end 21. At this time, the axial positions of the first end 11 and the second end 21 are fixed.

[0049] At this point, through the above method, the needle 100 has successively completed the coaxial positioning with the axial direction, the angular positioning and the axial position positioning, and achieved the positioning of the needle 100 from three angles by relying on the same needle positioning fixture.

[0050] Moreover, during the process, the first end 11 and the second end 21 are pre-merged, and then the first end 11 and the second end 21 are slightly opened, and then the bending portion 102 of the needle 100 is sent into the position between the first end 11 and the second end 21, and the first end 11 and the second end 21 are merged to achieve the clamping and positioning of the bending portion 102. Compared with directly merging the first end 11 and the second end 21 at one time and directly clamping the bending portion 102, the possibility of the first end 11 and the second end 21 causing damage and deformation to the fragile bending portion 102 structure is significantly reduced.

[0051] At the same time, after the above process, when the needle 100 is completely positioned, the locking block 6 can be set on the base 3 where the rod 101 is placed, so that the rod 101 and the base 3 are relatively fixed, so that the positioning of the needle 100 is maintained by the locking block 6, and then the first end 11 and the second end 21 can be separated, and the first clamp arm 1, the second clamp arm 2 and the slider 5 are retracted in the direction away from the needle 100, so that the bending portion 102 of the needle 100 is completely exposed, which is convenient for processing the bending portion 102 from various angles when the bending portion 102 is positioned. After the bending portion 102 is processed, the locking block 6 can be removed. At this time, the needle 100 is in a non-positioned free state, which is convenient for subsequent removal from the needle positioning fixture of this embodiment and the next step of operation. It is worth noting that in the above processing operation of the needle 100, it is only necessary to retract the first clamp arm 1 and the second clamp arm 2 according to the existing structure and fix it with the help of the locking block 6, which is easy to operate and has high processing efficiency.

[0052] Furthermore, when the first end 11 and the second end 21 clamp the bending portion 102 together, the first clamp arm 11 and the second clamp arm 21 are just limited by the first protrusion 41 protruding toward one end of the base of the support frame 4, so that the bending portion 102 has a preset angle around the axial direction when clamped by the first end 11 and the second end 21. In other words, the positioning angle of the bending portion 102 by the first end 11 and the second end 21 is affected by the position of the first protrusion 41. The first protrusion 41 limits the final rotational merging position of the first end 11 and the second end 21, and also limits the angle of the bending portion 102 after the positioning is corrected. Preferably, in this embodiment, the first protrusion 41 is located at the center of the support frame 4 to maintain the balance of the positioning of the bending portion 102.

[0053] Furthermore, if Figure 3 As shown, the first clamp arm 1 and the second clamp arm 2 are respectively limited by the second protrusion 32 protruding toward one end of the base 3 toward the support frame 4, so that the position of the bending portion 102 along the axial direction is positioned when the first end 11 and the second end 21 are clamped. Specifically, in this embodiment, two second protrusions 32 are provided corresponding to the first clamp arm 1 and the second clamp arm 2, respectively, wherein each second protrusion 32 includes a column structure installed in the base 3, and a spherical body structure protruding toward the first clamp arm 1 or the second clamp arm 2, and at the same time, the second protrusion 32 of the first clamp arm 1 or the second clamp arm 2 toward the corresponding position also includes a groove matching the hemisphere of the spherical body, so that when the first clamp arm 1 or the second clamp arm 2 contacts with the second protrusion 32, a slight positioning can be achieved by means of the geometric structure of the spherical body, which helps to correct the deviation that is not coaxial with the axial direction, so that the final positioning accuracy is higher.

[0054] Furthermore, when the bending portion 102 is clamped by the first end portion 11 and the second end portion 21, a portion of the first end portion 11 and the second end portion 21 makes way to form a make-away cavity for the bending portion 102, and another portion of the first end portion 11 and the second end portion 21 fits together, so that on the basis of maintaining the stability of the positioning of the bending portion 102, the bending portion 102 is clamped in the make-away cavity of a limited space, and the size of the bending portion 102 matches the make-away cavity, so as to prevent the bending portion 102 from being excessively subjected to the squeezing force from the first end portion 11 and the second end portion 21, and instead, the force given to the first clamp arm 1 and the second clamp arm 2 by the elastic element is converted into a fit force between the first end portion 11 and the second end portion 21.

[0055] Furthermore, the locking block 6 is arranged to avoid the position of the clamping area, and the locking block 6 contacts at least part of the rod 101 and the base 3, so that the locking block 6, the base 3, the rod 101, and the bending portion 102 are fixed to each other. Specifically, the locking block 6 can be made of a plastic material with a lower material strength than the rod 101 to avoid surface scratches on the rod 101 when fixing the rod 101. At the same time, the locking block 6 is arranged as an annular structure that can be fully sleeved on the base 3, and one side of the locking block 6 has a fastener that can be tightened, so that the operator can adjust the locking strength of the locking block 6 or realize the quick release and installation of the locking block 6.

[0056] Furthermore, if Figure 1 and Figure 3 As shown, the support frame 4 also includes a limit groove extending in the axial direction, and the slider 5 includes a limit pin 51 passing through the limit groove, and the limit groove limits the axial movement distance of the limit pin 51. Through the coordinated design of the limit groove and the limit pin 51, the axial movement distance of the first clamp arm 1 and the second clamp arm 2 driven by the slider 5 can be limited, so that the movement of the first clamp arm 1 and the second clamp arm 2 can be controlled, and under the coordination of the second protrusion 32 structure, the axial movement of the first clamp arm 1 and the second clamp arm 2 can be realized with higher precision.

[0057] Furthermore, the first clamping arm 1 and the second clamping arm 2 have grooves on the side away from the slider 5 for easy gripping, so that the first clamping arm 1 and the second clamping arm 2 can be more easily controlled in the case of manual operation.

[0058] Although different specific embodiments are mentioned in the content of this application, this application is not limited to the situations described in the industry standards or embodiments, etc. Some industry standards or slightly modified implementation plans based on the implementation of the custom methods or embodiments can also achieve the same, equivalent or similar, or predictable implementation effects after deformation of the above embodiments. The embodiments of data acquisition, processing, output, judgment methods, etc. after these modifications or deformations can still fall within the scope of the optional implementation plans of this application.

[0059] Although the present application has been described through embodiments, those skilled in the art will appreciate that there are many modifications and changes to the present application without departing from the spirit of the present application. It is intended that the attached embodiments include these modifications and changes without departing from the present application.

Claims

1. A needle positioning method for positioning the needle, wherein: The needle comprises a rod and a bent portion disposed at one end of the rod and bent in a direction not parallel to the extension direction of the rod; characterized in that the needle positioning method comprises: placing the shaft of the needle in the groove of the base so that the shaft is coaxially positioned with the axial direction; The first clamp arm and the second clamp arm move from the support frame direction toward the base direction until the first clamp arm for clamping the first end of the bent portion and the second clamp arm for clamping the second end of the bent portion are closed in the clamping area between the base and the support frame, and at this time, the first end and the second end are in contact with each other; The first end and the second end are separated, and then the rod slides in the groove along the axial direction toward the clamping area until the bent portion is sent to a position between the first end and the second end, and the first end and the second end are closed again, so that the bent portion is clamped by the first end and the second end, so that the angle of the bent portion around the axial direction is positioned; The rod is clamped on the base by a locking block to keep the needle in position, and then the first clamp arm and the second clamp arm are retracted to separate the first end and the second end again, so that the bent portion is exposed; The exposed bent portion is processed.

2. The needle positioning method according to claim 1, characterized in that: In the step "the first end and the second end are closed again so that the bent portion is clamped by the first end and the second end together, so that the angle of the bent portion around the axial direction is positioned", when the first end and the second end clamp the bent portion together, the first clamp arm and the second clamp arm are just limited by the first protrusion protruding toward one end of the base of the support frame, so that the bent portion has a preset angle around the axial direction when it is clamped by the first end and the second end.

3. The needle positioning method according to claim 1, characterized in that: After the step "the first end and the second end are closed again so that the bending portion is clamped by the first end and the second end so that the bending portion is positioned around the axial angle", before "the rod is clamped on the base by a locking block to keep the needle positioned, and then the first clamp arm and the second clamp arm are retracted so that the first end and the second end are separated again so that the bending portion is exposed", the first clamp arm and the second clamp arm are respectively limited by the second protrusion of the base protruding toward one end of the support frame so that the position of the bending portion along the axial direction is positioned when it is clamped by the first end and the second end.

4. The needle positioning method according to claim 1, characterized in that: In the step of "the first end and the second end are closed again so that the bending portion is clamped by the first end and the second end so that the bending portion is positioned around the axial angle", at least part of the first end and the second end just abut against each other.

5. The needle positioning method according to claim 4, characterized in that: In the step of "at least part of the first end and the second end are exactly in contact with each other", a clearance cavity for accommodating the bent portion is formed between at least part of the first end and the second end.

6. The needle positioning method according to claim 5, characterized in that: The size of the clearance cavity matches the size of the bent portion, and in the step of "the first end and the second end are closed again, so that the bent portion is clamped by the first end and the second end so that the bent portion is positioned around the axial angle", the position where the bent portion contacts the first end and the second end is set at the clearance cavity.

7. The needle positioning method according to claim 1, characterized in that: In the step of "clamping the rod on the base through a locking block to maintain the positioning of the needle", the locking block is arranged to avoid the position of the clamping area.

8. The needle positioning method according to claim 7, characterized in that: The locking block is in contact with at least a portion of the rod and the base, so that the locking block, the base, the rod and the bent portion are fixed to each other.

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