Needle tip inclination detection device and printing and dyeing spray needle welding tooling

Abstract

The present invention provides a device for detecting the inclination of a needle tip and a welding tool for a printing and dyeing spray needle, belonging to the field of detection technology. The detection device is used to detect the inclination of the needle tip of a needle tube. The detection device includes: a detection block, provided with a positioning channel and a detection groove intersecting with the positioning channel, the detection groove is provided with a detection surface, the detection surface is located in the extension direction of the positioning channel, the angle between the detection surface and the center line of the positioning channel constitutes a detection angle, and the angle of the detection angle corresponds to the inclination of the needle tip. The detection block is set with a standard detection angle, and the detection equipment can quickly judge the eligibility of the needle tip inclination by comparing the angle between the cut surface and the detection surface, without the need for tedious processes such as focusing, with high detection efficiency and simple operation, solving the technical problems of tedious operation, low detection efficiency and difficulty in focusing in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of detection technology, in particular to a device for detecting the inclination of a needle tip and a welding tool for a printing and dyeing spray needle. Background Art

[0002] Dyeing and printing equipment is equipped with numerous spray needles, which are used to spray dye to dye or coat fabric. These needles consist of a needle tube, a metal sheet welded to the outer wall of the tube, and piezoelectric resonators fixed to either side of the sheet. The needle tube has a facetted end that forms a tip slope with the tube. This tip slope significantly affects the dye's spraying quality. Furthermore, the angle at which the needle tube is welded to the metal sheet also affects the dye's spraying quality.

[0003] In addition, the main medical devices for clinical medical treatment such as drug injection and puncture sampling all have metal needle tips. The inclination of the metal needle tip greatly affects the degree of damage to skin tissue during the injection and puncture process, and thus affects the degree of pain caused by stimulation of nerve endings.

[0004] In the prior art, the tip inclination of a needle is primarily measured using a two-dimensional imaging instrument. The measurement process involves: 1. Mounting the metal needle to be measured on a dedicated measuring fixture; 2. Moving the stage to bring the needle tip to a two-dimensional measurement display; 3. Focusing the needle tip. Because the outer surface of the needle tip is cylindrical, focusing the needle using a two-dimensional imaging instrument can be difficult, resulting in blurred measurement images and inaccurate data. Furthermore, these steps are cumbersome, inefficient, and result in large measurement errors. Summary of the Invention

[0005] In order to solve the technical problems of the prior art such as complicated operation, low detection efficiency and great focusing difficulty, the present invention proposes a needle tip inclination detection device and a welding tool for a printing and dyeing spray needle.

[0006] The present invention discloses a needle tip inclination detection device for detecting the needle tip inclination of a needle tube. The detection device comprises:

[0007] The detection block is provided with a positioning channel and a detection groove intersecting with the positioning channel. The detection groove is provided with a detection surface. The detection surface is located in the extension direction of the positioning channel. The angle between the detection surface and the center line of the positioning channel constitutes a detection angle. The angle of the detection angle corresponds to the inclination of the needle tip.

[0008] In one embodiment, the width of the detection slot is set to B, 1≤B / R≤5, where R is the radius of the needle tube.

[0009] In one embodiment, the detection groove and the positioning channel are recessed from the same surface of the detection block, and the depth of the detection groove is greater than or equal to the depth of the positioning channel.

[0010] In one embodiment, the positioning channel includes a positioning area and an expansion area, the width of the expansion area gradually increases from the positioning area to the edge of the detection block, the groove width of the positioning area is greater than or equal to the diameter of the needle tube, and the length dimension of the positioning area is set to L, where 5≤L / D≤100, where D is the diameter of the needle tube.

[0011] In one embodiment, the detection device further includes a measuring base, the measuring base is provided with a mounting groove, and the detection block is detachably mounted on the measuring base and is located in the mounting groove.

[0012] The present invention also discloses a welding tool for a printing and dyeing spray needle, which includes a needle tube and a metal sheet assembly connected to the needle tube. The welding tool includes the detection device as described above, a clamping assembly movably connected to the detection block, and a clamping block movably installed on the detection device. The clamping block is provided with a welding channel and a plug-in channel. The extension direction of the welding channel and the extension direction of the plug-in channel at least partially intersect. The positioning channel is located in the extension direction of the welding channel. The clamping assembly is used to push the metal sheet assembly along the plug-in channel to insert into the positioning channel.

[0013] In one embodiment, the pressing block is rotatably connected to the detection block; or, the pressing block is slidably plug-connected to the detection block.

[0014] In one embodiment, the detection block is provided with a guide mechanism, and the guide mechanism is used to guide the metal sheet assembly to move toward the insertion channel for insertion.

[0015] In one embodiment, the guide mechanism includes a limiting groove recessed from the surface, the bottom of the limiting groove is flush with the hole wall of the insertion channel, and the groove walls on opposite sides of the limiting groove are slidably matched with the two side surfaces of the metal sheet assembly.

[0016] In one embodiment, the guide mechanism further includes a space-avoiding groove recessed from the limiting groove, and a width of the space-avoiding groove is smaller than a width of the limiting groove.

[0017] In one embodiment, the clamping assembly moves in a linear telescopic manner.

[0018] In one embodiment, the clamping assembly includes an elastic member and a push block connected to the elastic member, and the push block elastically telescopically moves toward the insertion channel under the elastic force of the elastic member.

[0019] In one embodiment, the clamping assembly includes a guide post connected to the detection block, the elastic member is sleeved on the guide post, and the push block is assembled on the guide post.

[0020] In one embodiment, the pushing block includes an assembly portion and a positioning portion protruding from the assembly portion, and a pushing surface is provided at a free end of the positioning portion, and the pushing surface is used to push and position the metal sheet assembly.

[0021] In the present invention, the positioning channel is used to define the outer wall of the needle tube, with the needle tip bevel facing the detection surface. If the fit between the cut surface of the needle tube and the detection surface reaches a preset range, the needle tip bevel of the needle tube meets the requirements; otherwise, it does not meet the requirements. The detection block is set with a standard detection angle, and the detection equipment can quickly determine the eligibility of the needle tip bevel by comparing the angle between the cut surface and the detection surface. This eliminates the need for tedious processes such as focusing, resulting in high detection efficiency and simple operation.

[0022] The welding tooling coordinates the positioning of the needle tube through the detection groove and the positioning channel, and pushes the metal sheet assembly to abut the welding position of the needle tube through the clamping assembly to achieve rapid positioning of the needle tube angle and welding part. The laser welding equipment corresponds to the welding printing and dyeing needle through the welding channel, thereby determining the vibration direction of the metal sheet assembly and the controllability of the intersection angle of the needle tube's cross section, resulting in high welding quality and high processing precision of the printing and dyeing needle. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0024] Figure 1 It is a structural diagram of a detection device provided in Example 1 of the present invention.

[0025] Figure 2 This is a structural schematic diagram of a needle tube abutting against a detection surface provided in the first embodiment of the present invention.

[0026] Figure 3 It is a structural schematic diagram of the detection block assembled on the measurement base provided in the first embodiment of the present invention.

[0027] Figure 4 It is a structural schematic diagram of the welding tool provided in the first embodiment of the present invention.

[0028] Figure 5 This is a structural schematic diagram of a metal sheet assembly assembled on a welding tool provided in a first embodiment of the present invention.

[0029] Figure 6 It is a structural schematic diagram of a guide mechanism pushing a metal sheet assembly provided in a first embodiment of the present invention.

[0030] In the figure, the detection block 10; the positioning channel 11; the positioning area 111; the expansion area 112; the detection groove 12; the detection surface 121; the limit groove 13; the air avoidance groove 14; the needle tube 20; the cut surface 21; the measuring base 30; the mounting groove 31; the clamping assembly 40; the push block 41; the assembly portion 411; the positioning portion 412; the push surface 413; the elastic member 42; the guide column 43; the clamping block 50; the welding channel 51; the plug-in channel 52; the metal sheet assembly 60; the metal sheet 61; and the piezoelectric resonator 62. DETAILED DESCRIPTION

[0031] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0033] Example 1

[0034] like Figure 1 and Figure 2 As shown, this embodiment provides a needle tip bevel detection device for detecting the tip bevel of a needle tube 20. The needle tube 20 is a circular tubular structure with an inclined section 21 provided at one end. The section 21 forms a pointed tip at the distal end of the needle tube 20. The section 21 defines the needle tip bevel relative to the centerline of the needle tube 20.

[0035] The detection device includes a detection block 10, which is a rigid structural member with a stable shape and size. The detection block 10 is provided with a positioning channel 11 and a detection groove 12 intersecting with the positioning channel 11. The positioning channel 11 is used to define the outer peripheral wall of the needle tube 20 so that the outer peripheral wall of the needle tube 20 is limited by the positioning channel 11, thereby preventing the center line of the needle tube 20 from swinging and achieving high overall accuracy. For example, the positioning channel 11 is configured as a positioning groove with a groove structure; or, the positioning channel 11 is configured as a positioning hole with a hole structure, and the outer peripheral wall of the needle tube 20 and the wall surface of the positioning channel 11 are clearance-matched to improve the circumferential positioning accuracy of the needle tube 20.

[0036] The detection groove 12 intersects with the positioning channel 11, wherein the detection groove 12 is provided with a detection surface 121, and the detection surface 121 is located in the extension direction of the positioning channel 11. The angle between the detection surface 121 and the center line of the positioning channel 11 constitutes a detection angle, and the angle of the detection angle corresponds to the needle tip inclination, and the needle tip inclination of the needle tube 20 faces the detection surface 121 side. The detection surface 121 is a standard plane, which is located on the groove wall of the detection groove 12. When the needle tube 20 is confined to the positioning channel 11, the cut surface 21 of the needle tube 20 is arranged opposite to the detection surface 121. The cut surface 21 is pushed at least partially against the detection surface 121 along the center line direction of the needle tube 20 to detect the relative angle between the cut surface 21 and the cut surface 21. When the fit between the cut surface 21 of the needle tube 20 and the detection surface 121 reaches the preset range, the needle tip inclination of the needle tube 20 meets the requirements, otherwise it does not meet the requirements.

[0037] The detection block 10 is provided with a standard detection angle, and the detection equipment can quickly judge the eligibility of the needle tip inclination by comparing the angle between the cutting surface 21 and the detection surface 121, without the need for tedious processes such as focusing, with high detection efficiency and simple operation. Among them, the detection equipment can be configured as an industrial CCD camera or other image acquisition equipment, and the angle between the cutting surface 21 and the detection surface 121 is determined by extracting the angle between the contour line formed by the corresponding imaging of the cutting surface 21 and the detection surface 121, so as to achieve a good detection effect. Alternatively, the detection equipment uses detection tools such as inserts to determine whether the cutting surface 21 is in contact with the detection surface 121, thereby determining whether the cutting surface 21 of the needle tube 20 is qualified, and the detection is convenient. Alternatively, manual visual inspection is used to preliminarily determine whether it is qualified.

[0038] The detection surface 121 is arranged on the groove wall of the detection groove 12 away from the positioning channel 11, and the detection surface 121 is configured as a flat plane. The shape of the detection groove 12 can be configured as a standard straight groove structure, or it can be set to a non-straight groove structure, wherein the detection surface 121 is configured as a plane to facilitate processing and flexible setting of the shape of the detection groove 12. Preferably, in order to improve the recognition of the detection surface 121, the detection surface 121 can be coated with a coating to improve the contour resolution. For example, the detection surface 121 is coated with wear-resistant ceramics. Alternatively, the bottom of the detection groove 12 can be coated with a coating to improve the direct recognition of the needle tube 20 and the edge of the detection surface 121. For example, the bottom of the detection groove 12 can be silver-plated, blackened, etc.

[0039] In an optional embodiment, the detection groove 12 is configured as a straight groove structure, wherein the width of the detection groove 12 is set to B, 1≤B / R≤5, and R is the radius of the needle tube 20. The diameter of the needle tube 20 is small, such as the needle tube 20 used for a syringe needle 20, a printing and dyeing spray needle, etc. When the groove width of the detection groove 12 is too large, the cross-section 21 is greatly affected by the fitting clearance between the needle tube 20 and the positioning channel 11 and the bending of the needle tube 20, which can easily cause distortion of the detection of the cross-section 21 and the detection surface 121. In this embodiment, when the ratio of the width of the detection groove 12 to the radius of the needle tube 20 can be set to 1, 1.5, 2, 3, 4, 5, etc., it has a better test effect and reduces the stress bending of the needle tube 20.

[0040] The detection groove 12 and the positioning channel 11 are configured as intersecting and interconnected spaces on the detection block 10. Preferably, the detection groove 12 and the positioning channel 11 are recessed from the same surface of the detection block 10 and are intersecting groove structures, wherein the depth of the detection groove 12 is greater than or equal to the depth of the positioning channel 11. The detection groove 12 and the positioning channel 11 are approximately T-shaped or L-shaped. The needle tube 20 is buckled into the notch of the positioning channel 11 or inserted from the edge of the detection block 10 until the distal end of the needle tube 20 is inserted into the detection groove 12, with the cut surface 21 facing and abutting the detection surface 121, to facilitate judgment and image acquisition.

[0041] The positioning channel 11 is configured as a straight groove structure, and the needle tube 20 is inserted through the opening of the positioning channel 11. Preferably, the positioning channel 11 is provided with a guide portion at the edge of the detection block 10. The guide portion is larger than the needle tube 20 to facilitate the insertion of the needle tube 20 into the positioning channel 11. For example, the guide portion is configured as a horn surface, a tapered bevel, etc.

[0042] In one embodiment, the positioning channel 11 includes a positioning area 111 and an expansion area 112. The width of the expansion area 112 gradually increases from the positioning area 111 toward the edge of the detection block 10, and the expansion area 112 is recessed inward from the edge of the detection block 10. For example, the groove walls on opposite sides of the expansion area 112 are curved or inclined surfaces to form a trumpet-shaped expansion structure.

[0043] The positioning area 111 is a straight groove structure to jointly define the needle tube 20. Among them, the groove width of the positioning area 111 is greater than or equal to the diameter of the needle tube 20, and the groove wall of the positioning area 111 and the outer peripheral wall of the needle tube 20 are clearance-matched, which can prevent the needle tube 20 from swinging too much, improve the detection accuracy, and maintain a good plugging and unplugging effect. Optionally, the groove walls on both sides of the positioning area 111 are arranged in parallel to form a parallel surface structure. Optionally, the groove walls on both sides of the positioning area 111 are configured as inclined surfaces, and the groove width of the positioning area 111 gradually decreases from top to bottom to adapt to the outer peripheral wall of the positioning needle tube 20.

[0044] In addition to limiting the needle tube 20 in the direction of the groove wall, the positioning area 111 also limits the mobility of the needle tube 20 in the length direction. Preferably, the length dimension of the positioning area 111 is set to L, wherein 5≤L / D≤100, wherein D is the diameter of the needle tube 20. The length of the needle tube 20 defined in the positioning area 111 can adjust the swing amplitude of the needle tube 20 relative to the positioning area 111, wherein the smaller the swing amplitude of the needle tube 20, the higher the measurement accuracy of the needle tip bevel. It is worth mentioning that the length dimension of the needle tube 20 defined by the positioning area 111 can be continuous, or it can be the sum of multiple defined lengths of the positioning areas 111 set at intervals.

[0045] Example 2

[0046] like Figure 1 and Figure 3 As shown, in addition to the detection block 10 disclosed in the above embodiment, the detection device can also be provided with other auxiliary accessories used in conjunction with the detection block 10 to improve detection flexibility, detection diversity, reduce usage costs and other functions.

[0047] In this embodiment, the detection device also includes a measurement base 30, which serves as a base for mounting the detection block 10. The detection device can be mounted below a testing instrument or moved in the testing direction of the testing equipment. For example, the detection device can be moved in the direction of a camera by moving the measurement base 30, allowing the camera to capture an image of the needle tube 20 and the testing surface 121 within a specified area.

[0048] The measurement base 30 is provided with a mounting slot 31, into which the test block 10 is removably mounted. The mounting slot 31 is recessed into the top surface of the measurement base 30, allowing the test block 10 to be removably mounted. This allows test blocks 10 with different detection angles to be freely assembled on the same measurement base 30, achieving universal compatibility. The modular structure of the test block 10 allows for localized finishing, reducing overall costs, expanding the detection range, and enhancing flexibility.

[0049] Example 3

[0050] like Figures 4 to 6 As shown, the printing and dyeing spray needle includes a needle tube 20 and a metal sheet assembly 60 connected to the needle tube 20. This embodiment provides a welding tool for the printing and dyeing spray needle, which is used to locate the junction of the needle tube 20 and the metal sheet assembly 60, so that the laser welding equipment can accurately weld the junction of the needle tube 20 and the metal sheet assembly 60.

[0051] The welding fixture includes the detection device disclosed in the above embodiment, a clamping assembly 40 movably connected to the detection block 10, and a pressing block 50 movably mounted on the detection device. In this embodiment, the detection block 10 can be configured as a single unit or as a separate unit. The clamping assembly 40 and the pressing block 50 are assembled to the detection block 10 and, together with the detection block 10, form a welding fixture for welding a printing and dyeing spray needle, thereby improving the accuracy of the angle between the cut surface 21 of the needle tube 20 and the metal sheet assembly 60.

[0052] The clamping block 50 is used to press and position the needle tube 20, spanning the positioning channel 11 to prevent the needle tube 20 from disengaging or moving from the positioning channel 11. The clamping block 50 is provided with a welding channel 51, which is located in the extension direction of the positioning channel 11. The centerline of the welding channel 51 is perpendicular to the length of the needle tube 20, so that the laser output by the laser welding equipment can be injected into the positioning channel 11 along the welding channel 51. Preferably, when the welding tool is in use, the welding channel 51 is located at the top of the clamping block 50 and penetrates to form an elongated hole structure.

[0053] The clamping block 50 is provided with an insertion channel 52. The extension direction of the welding channel 51 and the extension direction of the insertion channel 52 at least partially intersect. The clamping assembly 40 is used to push the metal sheet assembly 60 along the insertion channel 52 to insert it into the positioning channel 11. The insertion channel 52 is used to guide and define the welding position and welding angle of the metal sheet assembly 60 and the needle tube 20. The welding part of the metal sheet assembly 60 is inserted into the clamping block 50 along the insertion channel 52 until the end of the metal sheet assembly 60 abuts the outer peripheral wall of the needle tube 20. At this time, the joint between the needle tube 20 and the metal sheet assembly 60 is located in the extension direction of the welding channel 51, so that it can be welded and fixed by the laser welding equipment.

[0054] The clamping block 50 is movably connected to the detection block 10 to facilitate the removal of the printing and dyeing spray needle after welding. In an optional embodiment, the clamping block 50 is rotatably connected to the detection block 10 so that the clamping block 50 rotates across the top of the positioning channel 11. A rotating shaft is provided between the clamping block 50 and the detection block 10, and the clamping block 50 rotates around the rotating shaft to be crimped and fixed to the detection block 10. The rotating shaft and the clamping assembly 40 are respectively located on both sides of the positioning channel 11, and a plug-in groove is provided on one side of the clamping block 50. When the clamping block 50 is crimped to the detection block 10, a plug-in channel 52 is formed between the plug-in groove and the detection block 10. Alternatively, the clamping block 50 is at least partially embedded in the detection block 10, and the plug-in channel 52 is a hole structure provided on the clamping block 50, and the long side of the plug-in channel 52 is flush with the surface of the detection block 10.

[0055] In another optional embodiment, the clamping block 50 is connected to the detection block 10 by sliding plugging, and the clamping block 50 can move along the sliding direction to clamp or loosen the printing and dyeing needle. Specifically, a sliding hole is provided on the detection block 10, and the clamping block 50 is inserted into the sliding hole and slides along the sliding hole. A crimping portion is provided on the side of the clamping block 50, and a welding channel 51 and a plug-in channel 52 are provided in the crimping portion. Optionally, the crimping portion is provided with a plug-in groove on one side of the clamping block 50, and when the clamping block 50 is crimped to the detection block 10, a plug-in channel 52 is formed between the plug-in groove and the detection block 10. Optionally, the clamping block 50 is at least partially embedded in the detection block 10, and the plug-in channel 52 is a hole structure provided on the clamping block 50, and the long side of the plug-in channel 52 is flush with the surface of the detection block 10.

[0056] In an optional embodiment, the detection block 10 is provided with a guide mechanism for guiding the metal sheet assembly 60 to move toward the insertion channel 52 for insertion. The guide mechanism can be configured as a directional sliding structure such as a slide rail, a slide slot, or a groove to guide the metal sheet assembly 60 to move linearly along the guide mechanism. Not only can the movement direction, movement angle, and movement distance of the metal sheet assembly 60 be controlled by the guide mechanism, but the control effect is good.

[0057] In an optional embodiment, the guide mechanism includes a limiting groove 13 recessed from the surface, the bottom of the limiting groove 13 being flush with the wall of the insertion channel 52, and the opposite side walls of the limiting groove 13 slidingly engaging with the side surfaces of the metal sheet assembly 60. The limiting groove 13 is recessed from the surface of the detection block 10 to accommodate the metal sheet assembly 60. Preferably, the recessed depth of the limiting groove 13 is such that the mid-plane of the thickness of the welded metal sheet 61 in the metal sheet assembly 60 coincides with the centerline of the needle tube 20, so that the centerline of the metal sheet assembly 60 and the centerline of the needle tube 20 are centered.

[0058] The groove walls on both sides of the limiting groove 13 constitute a guiding structure for limiting the sliding direction of the metal sheet assembly 60 and the matching angle between the metal sheet assembly 60 and the needle tube 20. Among them, the width of the groove walls on both sides of the limiting groove 13 is slightly larger than the width of the opposite sides of the metal sheet assembly 60, so that the metal sheet assembly 60 can slide along the limiting groove 13 and have a positioning function.

[0059] Preferably, the guide mechanism further includes a clearance groove 14 recessed from the limiting groove 13, with the width of the clearance groove 14 being smaller than that of the limiting groove 13. The clearance groove 14 is recessed from the bottom of the limiting groove 13 to reduce the contact area between the limiting groove 13 and the metal sheet assembly 60, thereby improving the flexibility of movement. This also prevents the raised piezoelectric resonator 62 on the metal sheet 61 from abutting the limiting groove 13, thereby improving the movement accuracy of the metal sheet 61 in the metal sheet assembly 60 and reducing interference and instability factors.

[0060] Example 4

[0061] like Figures 4 to 6 As shown, the clamping assembly 40 is used to push the metal sheet assembly 60 toward the insertion channel 52 and maintain a tight connection between the metal sheet assembly 60 and the needle tube 20 to maintain stable welding quality. The clamping assembly 40 is movably assembled to the detection block 10, and the metal sheet assembly 60 is tightened and loosened during the movement of the clamping assembly 40.

[0062] Optionally, the clamping assembly 40 is rotated by a cam mechanism to achieve tightening and loosening of the metal sheet assembly 60 at different rotation positions of the cam mechanism, for example, tightening of the metal sheet assembly 60 is achieved at the cam top position and loosening of the metal sheet assembly 60 is achieved at the cam bottom position.

[0063] Optionally, the clamping assembly 40 can be configured to perform linear telescopic motion to achieve tightening and loosening of the metal sheet assembly 60. For example, the clamping assembly 40 can be configured as a linear telescopic screw mechanism or an electric push rod mechanism, thereby achieving telescopic linear motion at the output end. Alternatively, the clamping assembly 40 can be configured as a connecting rod mechanism, which includes a linear slider that slides within the limiting slot 13 to push the metal sheet assembly 60 for linear reciprocating motion. Optionally, the clamping assembly 40 can be configured as an elastic linear telescopic structure to achieve an automatically abutting movable structure.

[0064] In an optional embodiment, the clamping assembly 40 includes an elastic member 42 and a push block 41 connected to the elastic member 42. The push block 41 elastically expands and contracts toward the insertion channel 52 under the elastic force of the elastic member 42. The push block 41 is located in the limiting groove 13 and slides along the limiting groove 13. The elastic member 42 is configured as a spring structure, one end of which is fixed to the detection block 10 or a protrusion to which the detection block 10 is fixed. The other end of the elastic member 42 is connected to the push block 41 so that the metal sheet assembly 60 is pushed to move via the push block 41. The elastic expansion direction of the elastic member 42 is parallel to the centerline of the insertion channel 52, and the direction of the elastic force applied to the metal sheet assembly 60 is parallel to the centerline of the insertion channel 52, so that the force is stable. Optionally, the push block 41 is slidably connected to the limiting groove 13 to form a sliding positioning, and the plane of movement is stable. For example, guide grooves are provided on both sides of the limiting groove 13, and the push block 41 is slidably connected to the guide grooves to form a sliding structure.

[0065] In a preferred embodiment, the clamping assembly 40 includes a guide post 43 connected to the detection block 10, the elastic member 42 is sleeved on the guide post 43, and the push block 41 is assembled on the guide post 43. The guide post 43 is connected to the detection block 10 or the protrusion to which the detection block 10 is fixed to guide the elastic expansion and contraction change direction of the elastic member 42. The push block 41 is slidably connected to the guide post 43 and moves along the guide post 43 to abut against the metal sheet assembly 60. Optionally, the guide post 43 is slidably connected to the detection block 10 or the protrusion to which the detection block 10 is fixed, and the push block 41 is fixed to the end of the guide post 43, so that the elastic member 42 elastically pushes the push block 41 to move.

[0066] The metal sheet assembly 60 is located in the moving direction of the push block 41, wherein the push block 41 includes an assembly portion 411 and a positioning portion 412 protruding from the assembly portion 411, and the free end of the positioning portion 412 is provided with a push surface 413, and the push surface 413 is used to push and position the metal sheet assembly 60. The positioning portion 412 is used to position and limit the metal sheet assembly 60 so that the metal sheet assembly 60 can move linearly and reciprocatingly under the push of the push block 41. The push surface 413 is configured as a mating surface that pushes the metal sheet assembly 60 to move. Optionally, the push surface 413 is configured as a plane to push the metal sheet assembly 60 to move. Alternatively, the push surface 413 is configured as a concave curved surface or a V-shaped groove to constitute an automatic centering structure of the metal sheet assembly 60, thereby improving the positioning accuracy of the end of the metal sheet assembly 60.

[0067] For the purpose of illustration, the foregoing description uses specific nomenclature to provide a thorough understanding of the embodiments. However, it will be apparent to those skilled in the art that specific details are not required to practice the embodiments. Therefore, for the purpose of illustration and description, the foregoing description of the specific embodiments of this document is presented. These descriptions are not intended to be exhaustive or to limit the embodiments to the precise form disclosed. It will be apparent to those skilled in the art that, in view of the above teachings, many modifications and variations are feasible. In addition, when used herein to refer to the position of a component, the terms above and below or their synonyms do not necessarily refer to an absolute position relative to an external reference, but rather to the relative position of the component with reference to the accompanying drawings.

[0068] Furthermore, the foregoing figures and descriptions include many concepts and features that can be combined in various ways to achieve a variety of benefits and advantages. Thus, features, components, elements, and / or concepts from various different figures can be combined to produce embodiments or implementations that are not necessarily shown or described in this specification. Furthermore, in any particular embodiment and / or implementation, not all features, components, elements, and / or concepts shown in the specific figures or descriptions are necessarily required. It should be understood that such embodiments and / or implementations fall within the scope of this specification.

Claims

1. A welding tool for a printing and dyeing spray needle, the printing and dyeing spray needle comprising a needle tube and a metal sheet assembly connected to the needle tube, characterized in that: The welding tool comprises a detection device, a clamping assembly and a pressing block; The detection device is used to detect the needle tip inclination of the needle tube, and the detection device includes: a detection block, provided with a positioning channel and a detection groove intersecting with the positioning channel, the detection groove is provided with a detection surface, the detection surface is located in the extension direction of the positioning channel, the angle between the detection surface and the center line of the positioning channel constitutes a detection angle, and the angle of the detection angle corresponds to the needle tip inclination; The clamping assembly is movably connected to the detection block, and the pressing block is movably installed on the detection device; The clamping block is provided with a welding channel and a plug-in channel, the extension direction of the welding channel and the extension direction of the plug-in channel at least partially intersect, the positioning channel is located in the extension direction of the welding channel, and the clamping assembly is used to push the metal sheet assembly along the plug-in channel and insert it into the positioning channel.

2. The welding tool according to claim 1, characterized in that: The width of the detection slot is set to B, 1≤B / R≤5, where R is the radius of the needle tube.

3. The welding tool according to claim 1, characterized in that: The detection groove and the positioning channel are recessed from the same surface of the detection block, and the depth of the detection groove is greater than or equal to the depth of the positioning channel.

4. The welding tool according to claim 3, characterized in that: The positioning channel includes a positioning area and an expansion area. The width of the expansion area gradually increases from the positioning area to the edge of the detection block. The groove width of the positioning area is greater than or equal to the diameter of the needle tube. The length dimension of the positioning area is set to L, where 5≤L / D≤100, where D is the diameter of the needle tube.

5. The welding tool according to any one of claims 1 to 4, characterized in that: The detection device further includes a measuring base, the measuring base is provided with a mounting groove, and the detection block is detachably mounted on the measuring base and is located in the mounting groove.

6. The welding tool according to claim 1, characterized in that: The pressing block is connected to the detection block in a rotational manner; or the pressing block is connected to the detection block in a sliding and plug-in manner.

7. The welding tool according to claim 1, characterized in that: The detection block is provided with a guide mechanism, and the guide mechanism is used to guide the metal sheet assembly to move toward the insertion channel for insertion.

8. The welding tool according to claim 7, characterized in that: The guide mechanism includes a limiting groove recessed from the surface, the bottom of the limiting groove is flush with the hole wall of the insertion channel, and the groove walls on opposite sides of the limiting groove are slidably matched with the two side surfaces of the metal sheet assembly.

9. The welding tool according to claim 8, characterized in that: The guide mechanism further includes a space-avoiding groove recessed from the limiting groove, and a width of the space-avoiding groove is smaller than a width of the limiting groove.

10. The welding tool according to claim 1, characterized in that: The clamping assembly moves in a linear telescopic manner.

11. The welding tool according to claim 10, characterized in that: The clamping assembly includes an elastic member and a push block connected to the elastic member. The push block elastically telescopes toward the insertion channel under the elastic force of the elastic member.

12. The welding tool according to claim 11, characterized in that: The clamping assembly includes a guide column connected to the detection block, the elastic member is sleeved on the guide column, and the push block is assembled on the guide column.

13. The welding tool according to claim 11, characterized in that: The pushing block includes an assembly portion and a positioning portion protruding from the assembly portion. The free end of the positioning portion is provided with a pushing surface, and the pushing surface is used for pushing and positioning the metal sheet assembly.

Images