A welding needle trimming device and trimming method

Abstract

The present invention relates to the technical field of welding needle grinding equipment, and specifically provides a welding needle dressing device and a dressing method. The device includes a first grinding unit and a second grinding unit. The first grinding unit includes a base plate, a first auxiliary mounting and positioning module, a first tool and a first rotating drive mechanism. The first auxiliary mounting and positioning module is fixedly connected to a first fixture. The first fixture is provided with a first welding needle hole penetrating its upper and lower end surfaces. The first rotating drive mechanism is connected to the first tool through a first coupling. The upper end of the blade of the first tool is provided with a concave semicircular arc inner R angle. The second grinding unit grinds the flat end of the welding needle by a cylindrical second tool. The dressing device of the present invention can jointly realize the grinding of the semicircular head end and the flat end of the welding needle, which meets the grinding requirements of the existing new semicircular head welding needles and has a high value of promotion and application.

Description

[Technical field]

[0001] The invention relates to the technical field of welding needle grinding equipment, and in particular to a welding needle trimming device and a trimming method. [Background technology]

[0002] In the production process of cylindrical lithium batteries, the negative pole ear needs to be welded to the bottom of the battery shell when the battery cell is wound and put into the shell. This requires the use of a welding needle. The welding needle used is divided into two parts: the body and the electrode. Generally, the thinner end is the electrode; usually both ends of the welding needle are conductive contact surfaces, so the conductive contact surface of the welding needle is required to have a good current conduction effect. However, since the welding needle is exposed to the air for a long time or used a certain number of times, an oxide layer will inevitably form on its surface. In addition, during the welding process, the welding needle electrode is heated and pressed, or sticking welding, explosion welding, etc., causing pits, spikes, mushroom heads, etc. on the welding needle electrode, so it is necessary to grind the two ends of the welding needle. In addition, welding needles with flat electrode ends are prone to cold welding, explosion welding, uneven welding points, obvious welding scars, etc. during use. Some companies have begun to use semi-circular head welding needles, that is, the electrode end of the welding needle is semi-circular.

[0003] At present, there are two methods for welding needle grinding: physical grinding and chemical grinding. The basic principle of physical grinding is to grind the end face of the welding needle with a high-speed rotating grinding disc. For example, the Chinese utility model patent with publication number CN207077285U discloses an automatic welding needle grinding mechanism, which fixes the welding needle by hinged clamping, and at the same time, the rotating shaft installed on the lifting shaft drives the grinding disc to rotate, and then the end of the welding needle is ground by the descending movement on the lifting shaft. This device fixes the welding needle under the rotating shaft, rotates the rotating shaft on which the grinding disc is installed, and moves the upper and lower shafts on which the rotating shaft is installed up and down. In this device, the end face of the welding needle is ground by a high-speed rotating grinding disc. In addition, the higher the rotation speed of the grinding disc, the better the finish of the welding needle end face. However, when using this method, since the welding needle itself is made of copper, it is easy to stick to the grinding disc, which affects the service life of the grinding disc on the one hand, and affects the grinding time and the polishing finish on the other hand. Due to the mutual restriction between the grinding amount and the polishing finish, it is generally necessary to grind first and then polish to meet the use requirements, which is not conducive to cost control. In addition, this method will cause dust pollution, and only flat-end welding needles can be grinded, and existing semi-circular welding needles cannot be grinded. At the same time, the method of grinding with abrasive belts also has such problems. Chemical grinding is to place the welding needle in a pickling solution, which does not react with the welding needle itself, so that the oxide layer and the welding needle react chemically and are removed. For example: The Chinese invention patent with publication number CN110184613A discloses a method for removing the oxide layer of a point bottom welding needle and its auxiliary device. This device vertically inserts the welding needle into a receiving groove and immerses the point bottom welding needle in a specific pickling solution to remove the oxide layer on the surface of the welding needle end through reaction. Although this method can remove the oxide layer, in addition to the oxide layer, the welding needle will also have local damage caused by heating, pressure or explosion welding during use. If the welding needle is treated with pickling to remove the oxide layer, it can only react with the oxide layer and cannot repair the damaged part of the welding needle. Therefore, the welding needle after use will have problems such as uneven end face and irregular surface after treatment, resulting in poor welding such as cold welding and explosion welding in subsequent welding. There is a greater risk of use. In addition, this method requires the use of a certain amount of acidic substances and has certain potential dangers. It takes a certain amount of time to react. The reaction time of different welding needles is different, and the longest reaction time must be used as the standard. There are problems of uncertain time consumption and long time consumption.

[0004] Therefore, it is necessary to develop a device that can grind semi-circular head welding needles and has a faster grinding speed to meet the current market demand. [Summary of the invention]

[0005] The purpose of the present invention is to provide a welding needle dressing device and a dressing method for the above-mentioned problems. The device of the present invention can realize the grinding of the semi-circular head end and the flat end of the welding needle, meet the grinding requirements of the existing new semi-circular head welding needle, and have a high value of promotion and application.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A welding needle dressing device comprises a first grinding unit, the first grinding unit comprises a vertically set bottom plate, a first auxiliary installation and positioning module, a first tool and a first rotary drive mechanism, the bottom plate is mounted with a first auxiliary installation and positioning module, the first auxiliary installation and positioning module is fixedly connected to a first fixture, a first welding needle hole is provided inside the first fixture, which passes through the upper and lower end surfaces thereof, the lower part of the first welding needle hole is a stepped through hole which is wide at the top and narrow at the bottom, and the diameter of the narrower part of the stepped through hole is smaller than the diameter of the thicker part of the welding needle, thereby limiting the welding needle; the first rotary drive mechanism comprises a first rotary power part, the first rotary power part is connected to a first rotary shaft, the first rotary shaft is connected to one end of a first coupling, and a first tool is installed at the other end of the first coupling; the first tool comprises a first tool body and a blade formed at one end of the first tool body, the first tool body is connected to the first coupling, the front side of the blade is a first inclined surface, the rear side is a second inclined surface, and an inwardly concave semicircular arc inner R angle is provided on the upper end of the blade.

[0008] Furthermore, the first fixture can achieve relative displacement and positioning with the first tool by means of the auxiliary positioning module, and its directions include X, Y and Z axes.

[0009] Furthermore, it also includes a first collecting structure and a horizontal working panel, the first rotating power part is located below the working panel, and the first coupling penetrates the working panel and extends to the top of the working panel; the first collecting structure includes a cyclone generating member, a collecting member, a first connecting pipe, a first guide pipe and a storage member; the cyclone generating member is a trumpet-shaped member that is narrow at the top and wide at the bottom, and is arranged on the outside of the first coupling, the inner side of the narrower part of the trumpet shape is fixedly connected to the outside of the first coupling, and a plurality of air inlets are provided on the trumpet-shaped side wall of the cyclone generating member, and an air outlet gap is left between the lower end of the cyclone generating member and the working panel; the collecting member is a pipe member with a spiral inner circle, the collecting member cover is arranged on the outside of the cyclone generating member, the lower end of the collecting member is sealed and fixed to the working panel, and the collecting member is provided with a downwardly inclined first connecting pipe at the maximum spiral position, the first connecting pipe is connected to the first guide pipe, and the first guide pipe is connected to the storage member.

[0010] Furthermore, the first tool body is cylindrical, and chip removal grooves are provided on the front and rear sides of the blade.

[0011] Furthermore, it also includes a second grinding unit, which includes a second auxiliary positioning and mounting module, a second fixture, a second tool and a second rotation drive mechanism; the second auxiliary positioning and mounting module is mounted on the base plate, and the second auxiliary positioning and mounting module is connected to a second fixture on the side away from the base plate, and the second fixture is provided with a second welding pin hole that passes through the upper and lower end surfaces of the second fixture, and the second fixture is also provided with a welding pin fixing assembly for fixing the welding pin; the second rotation drive mechanism is arranged below the second auxiliary positioning and mounting module, and the rotation axis of the second rotation drive mechanism is horizontally arranged and horizontally connected to the second tool through a second coupling, and the second tool includes a second tool body and a second tool head, the second tool head is cylindrical, and the second tool head is located below the second fixture.

[0012] Furthermore, the second auxiliary positioning and mounting module includes a base, an X-axis displacement assembly, and a positioning block; the base is mounted on the bottom plate, the X-axis displacement assembly is arranged on a side of the base away from the bottom plate, the X-axis displacement assembly is slidably connected to the bottom plate along the X-axis, and a plurality of threaded holes are opened on the X-axis displacement assembly, the threaded holes are threadedly connected to fixing bolts, the fixing bolts abut against the X-axis displacement assembly, and are used to fix the X-axis displacement assembly; the positioning block has a mounting portion, the positioning block is mounted on the base through the mounting portion, the upper end of the positioning block has a horizontal positioning surface, the positioning surface is located below the second welding pin hole, and is used to position the lower end of the welding pin.

[0013] Furthermore, a side panel of the X-axis displacement component away from the base is provided with a slide rail along the X-axis, and a slider is provided on the second fixture, and the second fixture is slidably connected to the X-axis displacement component through the slider; an operating handle protrudes outward on the side of the second fixture away from the X-axis displacement component.

[0014] Furthermore, a raised portion protruding toward the second jig is provided in the middle of one side of the X-axis displacement assembly away from the bottom plate, and both sides of the raised portion are non-raised horizontal portions; a side of the second jig facing the X-axis displacement assembly is a hollowed-out portion formed by hollowing out, so that the second welding pin hole is divided into two holes; the welding pin fixing assembly includes a spring sheet and a rotating shaft, one end of the spring sheet is fitted and fixed on one side of the bottom wall of the hollowed-out portion, and the spring sheet close to the end is bent and protruded toward the X-axis displacement assembly and then abuts against one of the horizontal portions, and the other end of the spring sheet extends horizontally to the other side of the bottom wall of the hollowed-out portion and surrounds a rotating shaft, the rotating shaft is vertically arranged inside the second jig, and the rotating shaft is rotatably connected to the second jig; the second welding pin hole is located between the bent portion of the spring sheet and the rotating shaft, and the welding pin is clamped between the spring sheet and the bottom wall of the hollowed-out portion of the second jig; the welding pin fixing assembly is provided at two locations, respectively located above and below the slider.

[0015] Furthermore, the second grinding unit also includes a return spring, one end of which is fixed on the X-axis displacement assembly, and the other end is fixedly connected to the second fixture through a fixed column; the fixed column is a column protruding from the second fixture toward the X-axis displacement assembly; when the spring sheet abuts against one of the horizontal parts, the return spring has no elastic deformation.

[0016] Furthermore, the second grinding unit also includes a second collecting structure, which includes a second connecting tube and a second guide tube, the tube mouth of the second connecting tube is located directly below the second cutter head, one end of the second guide tube is connected to the second connecting tube, and the other end is connected to the storage member; the positioning block is a U-shaped structure, and the two sides of the U-shaped structure are arranged on both sides of the length direction of the second tool, so as to block the grinding debris.

[0017] The welding needle trimming method using the above-mentioned trimming device comprises the following steps:

[0018] (1) Device adjustment: The position of the first fixture is adjusted by the first auxiliary positioning installation module, so that when the welding needle is installed in the first fixture, the welding needle is located directly above the inner R angle of the first tool, so that the axis of the semicircular head end of the welding needle coincides with the rotation axis of the first tool; the positioning surface of the positioning block is adjusted to be slightly lower than the section surface of the highest point of the second tool head, and the height difference is the cutting amount of the flat head end;

[0019] (2) Grinding the semi-circular head of the welding needle: placing the semi-circular head of the welding needle downward in the first welding needle hole, and when the first tool is driven by the first rotation drive mechanism, manually pressing the welding needle together with the first fixture downward so that the round head of the welding needle contacts the inner R angle of the first tool, thereby grinding the semi-circular head of the welding needle; the generated debris is collected by the first collection mechanism;

[0020] (3) Grinding the flat end of the welding needle: Push the second fixture to move horizontally, and the raised portion on the X-axis displacement assembly presses the spring sheet, causing the spring sheet to deform and thereby press the welding needle at the second welding needle hole. At the same time, the welding needle moves to contact the second tool, thereby grinding the flat end of the welding needle; the generated debris is collected by the second collection mechanism.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0022] 1. The first grinding unit provided by the present invention realizes the displacement of the X-axis, Y-axis and Z-axis through the first auxiliary installation positioning module, so that the position of the first fixture and the welding needle can be aligned and matched with the position of the tool, which is convenient for installation, adjustment and guarantee of grinding accuracy; the height position of the semicircular head of the welding needle is cleverly limited by setting a step hole in the first fixture; and a specially customized tool is used to meet the grinding of the semicircular head shape of the welding needle. The tool performs grinding operations in a cutting manner, and can perform grinding with a larger feed amount, and the grinding speed is faster. The tool is used for grinding in a high-speed rotation manner, which can achieve a very high finish, and can meet the use requirements in one grinding without polishing again. The present grinding unit is also provided with an applicable first debris collection structure according to the characteristics of the grinding method, and the debris in the grinding process is collected into the storage part by the airflow generated by the spiral collection part and the cyclone generating part, so as to reduce dust pollution. The entire device is designed to be an organic whole, with the advantages of fast grinding speed, good grinding finish, consistent grinding, and less environmental pollution.

[0023] 2. The present invention sets a second grinding unit and realizes the displacement of the X-axis through the second auxiliary installation positioning module, so that the position of the second fixture and the welding needle can be aligned and matched with the position of the tool, which is convenient for installation, adjustment and guaranteeing the grinding accuracy; the positioning surface of the positioning block is used to limit the flat end of the welding needle, and the matching relationship between the spring and the X-axis displacement component is used to achieve the compression of the welding needle and the grinding of the flat end of the welding needle, so that the consistency of the trimmed welding needle is good. The grinding unit is also provided with a suitable second debris collection structure according to the characteristics of the grinding method, and the positioning block is used to block the debris while playing a positioning role, and the debris is sent to the debris collection piece in a one-way direction through the second connecting tube and the second guide tube to reduce dust pollution.

[0024] The present invention can realize the grinding of the semicircular head end and the flat end of the welding needle, meets the grinding demand of the existing new semicircular head welding needle, and has high promotion and application value.

Brief Description of the Drawings

[0025] Figure 1 It is a three-dimensional diagram of the overall structure of the welding needle grinding device of the present invention;

[0026] Figure 2 It is a three-dimensional diagram of the internal structure of the welding needle grinding device of the present invention;

[0027] Figure 3 It is a schematic diagram of the planar structure of the welding needle grinding device of the present invention;

[0028] Figure 4 It is a schematic diagram of the structure of the cyclone generating member in welding of the present invention;

[0029] Figure 5 It is a schematic diagram of the internal structure of the first welding jig in the present invention;

[0030] Figure 6 This is a diagram showing the first fixture of the present invention in use with a soldering pin placed thereon;

[0031] Figure 7 is a schematic diagram of the three-dimensional structure of the first tool in the present invention;

[0032] Figure 8 is a schematic structural diagram of the first tool in the invention from another perspective;

[0033] Fig. 9 It is a functional schematic diagram of the second grinding unit in the invention;

[0034] Fig.10 It is a schematic diagram of the structure of the second fixture in the invention.

[0035] Among them, 1-first grinding unit, 11-first auxiliary installation and positioning module; 12-first fixture, 121-first welding pin hole, 13-first collecting structure, 131-collecting member, 132-cyclone generating member, 1321-air inlet, 133-first connecting pipe, 134-first guide pipe, 135-storage member, 14-first tool, 141-first tool body, 142-first bevel, 143-inner R angle, 144-second bevel, 145-chip groove, 15-first rotation drive structure; 2-second grinding unit, 21-auxiliary installation and positioning Module, 211-base, 212-X-axis displacement assembly, 213-slide rail, 214-fixing bolt, 215-positioning block, 2151-installing part, 2152-positioning surface, 22-second fixture, 221-second welding pin hole, 222-rotating shaft, 223-spring, 224-slider, 225-fixing column, 23-second rotary drive structure, 24-second coupling, 25-second tool, 26-second collecting structure, 261-second connecting tube, 262-second guide tube, 3-bottom plate, 4-working panel, 5-welding pin, 6-mask. [Specific implementation method]

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The drawings are only for illustrative purposes and represent only schematic diagrams, not physical drawings, and cannot be understood as limitations on this patent. In order to better illustrate the specific implementation methods of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. It is understandable to those skilled in the art that some well-known structures, parts and their descriptions in the drawings may be omitted. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] See also Figure 1 The present invention provides a welding needle trimming device, which comprises a first grinding unit 1 and a second grinding unit 2. The first grinding unit 1 can grind the semicircular head of the welding needle 5, and the second grinding unit 2 can grind the flat end of the welding needle 5. The first grinding unit 1 and the second grinding unit 5 can be independently arranged, or they can be arranged as Figure 1 As shown, they are all installed on the same bottom plate 3 and working panel 4. The internal structure diagram of the first grinding unit 1 and the second grinding unit 2 is shown in Figure 2 , the two are described in detail as follows.

[0039] Continue to see Figure 2-4 The first grinding unit includes a vertically erected bottom plate 3, a first auxiliary installation and positioning module 11, a first tool 14 and a first rotation drive mechanism 15. The first auxiliary installation and positioning module 11 is installed on the bottom plate 3. The first auxiliary installation and positioning module 11 is used for positioning during installation so that the welding needle 5 corresponds to the position of the first tool 14 to meet the grinding needs. The first auxiliary installation and positioning module 11 is fixedly connected to the first fixture 12. The first fixture 12 is provided with a first welding needle hole 121 that runs through its upper and lower end surfaces. The lower part of the first welding needle hole 121 is a stepped through hole that is wide at the top and narrow at the bottom. For specific implementation methods, see Figure 5 and Figure 6 The diameter of the narrower part of the step through hole is smaller than the minimum diameter of the thicker part of the welding needle, so as to limit the welding needle; the first rotary drive mechanism 15 has a first rotary power part, the first rotary power part is connected to the first rotary shaft, the first rotary shaft is connected to one end of the first coupling 16, and the other end of the first coupling 16 is installed with the first tool 14; the specific structure of the first tool 14 is shown in Figure 7 and Figure 8 It includes a first blade body 141 and a blade formed at one end of the first blade body 141. The first blade body 141 is connected to the first coupling 16. The front side of the blade is a first inclined surface 142, and the rear side is a second inclined surface 144. A concave semicircular inner R angle 143 is provided on the upper end of the blade.

[0040] In the above-mentioned welding needle grinding device, the first auxiliary installation and positioning module 11 is an existing module that can realize the displacement of the X-axis, Y-axis and Z-axis. The first fixture can realize relative displacement and positioning with the first tool through the auxiliary positioning module, and its directions include X, Y and Z axes. Before use, the welding needle is placed in the first fixture 12, and the position of the first fixture 12 is adjusted by the first auxiliary installation and positioning module so that the semi-circular head end of the welding needle is directly above the inner R angle 143 of the first tool 14. When the first tool 14 is driven by the first rotary drive mechanism 15, the welding needle 5 is manually pressed down together with the first fixture 12 so that the round head end of the welding needle 5 contacts the inner R angle of the first tool 14, thereby grinding the welding needle 5. As the first rotary drive mechanism 15, its power part can be an electric motor, a rotary cylinder or a rotary motion conversion mechanism.

[0041] In the above-mentioned welding needle grinding device, as a preference, it also includes a first collecting structure 13 for collecting waste chips and a horizontal working panel 4, see Figure 2 and 3 , especially refer to Figure 3 The first rotating power part 15 is located below the working panel 4, thereby hiding it. The first coupling 16 penetrates the working panel 4 and extends to the top of the working panel 4; the first collecting structure includes a cyclone generating member 132, a collecting member 131, a first connecting pipe 133, a first guiding pipe 134 and a receiving member 135; the cyclone generating member 132 is a trumpet-shaped member with a narrow upper part and a wide lower part, which is arranged on the outer side of the first coupling 16, and the inner side of the narrower part of the trumpet is fixedly connected to the outer side of the upper end of the first coupling 16, and the cyclone generating member 13 2 A plurality of air inlets 1321 are provided on the trumpet-shaped side wall, and an air outlet gap is provided between the lower end of the cyclone generating member 132 and the working panel 4; the collecting member 131 is a pipe member with a spiral inner circle, and the collecting member 131 cover is arranged on the outer side of the cyclone generating member 132, and the lower end of the collecting member 131 is sealed and fixed to the working panel 4, and the collecting member 131 is provided with a downwardly inclined first connecting pipe 133 at the maximum point of the spiral, and the first connecting pipe 133 is connected to the first guide pipe 134, and the first guide pipe 134 is connected to the storage member 135. With the above arrangement, the cyclone generating member 132 generates a rotating airflow while following the high-speed rotation of the first rotating power part 15, and the debris rotates with the rotating airflow, and when it rotates to the maximum point of the spiral, the debris enters the storage member 15 through the first connecting pipe 133 and the first guide pipe 134 to reduce dust pollution. The present invention can also be provided with a mask 6, see Figure 3 In the embodiment, the mask 6 stores the first collecting structure 13, the first cutter, etc. in the mask 6, making the device neater and more beautiful, and preventing the power part from being exposed and causing harm to people.

[0042] In the above-mentioned welding needle grinding device, as the first blade body 14, it is preferred that its main body shape is a cylindrical body, see Figure 7 and8 The front and rear sides of the blade are also provided with a chip removal groove 145. Through this arrangement, the waste chips generated during the welding needle grinding process can be easily removed from the chip removal groove 145 to avoid accumulation at the inner R angle blade.

[0043] See also Figure 1 , 2 , 9 and 10, the second grinding unit 2 includes a second auxiliary positioning and installation module 21, a second fixture 22, a second tool 25 and a second rotation drive mechanism 23; the second auxiliary positioning and installation module 21 is also installed on the base plate 3, and the second auxiliary positioning and installation module 21 is used to position and install the second fixture 22 so that the welding needle 5 corresponds to the position of the second tool 25. The second auxiliary positioning and installation module 21 is horizontally slidably connected to the second fixture 22 on the side away from the base plate 3, and the second fixture 22 is provided with a second welding needle hole 221 that passes through the upper and lower end surfaces of the second fixture 22. The second fixture 22 is also provided with a welding needle fixing assembly for fixing the welding needle 5; the second rotation drive mechanism 23 is arranged below the second auxiliary positioning and installation module 21, and the rotation axis of the second rotation drive mechanism 23 is arranged horizontally, and is horizontally connected to the second tool 25 through the second coupling 24. The second tool 25 includes a second tool body and a second tool head, and the second tool head is cylindrical, and the second tool head is located below the second fixture 22.

[0044] In the above-mentioned welding needle grinding device, the welding needle 5 is placed in the second welding needle hole 221. When the second tool 25 is driven by the second rotary drive mechanism 23, the second fixture 22 equipped with the welding needle 5 is manually pushed horizontally to the right, and the welding needle 5 is fixed by the welding needle fixing assembly. After being pushed, the flat end of the welding needle 5 contacts the second tool 25, so as to grind the flat end of the welding needle 5. The second rotary drive mechanism 23 can be a motor, a rotary cylinder or a rotary motion conversion mechanism. As a welding needle fixing assembly, it can clamp the welding needle 26, specifically, it can clamp the welding needle 5 during grinding, and can be released after the grinding is completed.

[0045] In the above-mentioned welding needle grinding device, as a second auxiliary positioning and installation module 21, it includes a base 211, an X-axis displacement component 212, and a positioning block 215; the base 211 is installed on the base plate 3 by bolts, and the X-axis displacement component 212 is arranged on the side of the base 211 away from the base plate 3. The X-axis displacement component 212 is slidably connected to the base 211 along the X-axis, and a plurality of threaded holes are opened on the X-axis displacement component 212, and the threaded holes are threadedly connected to fixing bolts 214, and the fixing bolts 214 are in contact with the base 211 to fix the X-axis displacement component 212. The positioning block 215 has a mounting portion 2151, and the positioning block 215 is mounted on the base 211 through the mounting portion 2151. The mounting method can be movably mounted using fixing bolts to facilitate position adjustment. The upper end of the positioning block 215 has a horizontal positioning surface 2152, and the positioning surface 2152 is located below the second welding needle hole 221, and is used to position the lower end of the welding needle 5. When the positioning block 215 is installed, it is necessary to ensure that the positioning surface 2152 of the positioning block 215 is slightly lower than the section at the highest point of the second cutter head, and the height difference is the cutting amount of the flat head end. A slide rail 213 along the X-axis is provided on a side panel of the X-axis displacement component 212 away from the base 211, and a slider 224 is provided on the second fixture 22. The second fixture 22 is slidably connected to the slide rail 213 of the X-axis displacement component 212 through the slider 224; an operating handle 28 protrudes outward on the side of the second fixture 22 away from the X-axis displacement component 212, which is convenient for manual sliding operation. When in use, the operating handle 28 is held and moved left and right, so that the second fixture 22 can be relatively displaced relative to the X-axis displacement component 212 , driving the welding needle 5 to move to just above the second tool 25 .

[0046] In the above-mentioned welding needle grinding device, as a welding needle fixing component, it cooperates with the X-axis displacement component 212 to produce a function. Specifically, a raised portion 2121 protruding toward the second fixture 22 is provided in the middle of one side of the X-axis displacement component 212 away from the base 211, and both sides of the raised portion 2121 are non-raised horizontal portions 2122, and an arc-shaped transition is adopted between the raised portion 2121 and the horizontal portion 2122; the side of the second fixture 22 facing the X-axis displacement component 212 is a hollowed-out portion formed by hollowing out, so that the second welding needle hole 221 is divided into two holes; the welding needle fixing component includes a spring piece 223 and a rotating shaft 222, one end of the spring piece 223 is fitted and fixed to one side of the bottom wall of the hollowed-out portion, and the spring piece 223 near the end is bent and protruded toward the X-axis displacement component 212 and then abuts against the bottom wall. In one of the horizontal parts 2122, the other end of the spring piece 223 extends horizontally to the other side of the bottom wall of the hollowed-out part and surrounds a rotating shaft 222. The rotating shaft 22 is vertically arranged inside the second fixture 22 and is rotatably connected to the second fixture 22. The second welding pin hole 221 is located between the bent part of the spring piece 223 and the rotating shaft 222, so that the welding pin 5 is clamped between the spring piece 223 and the bottom wall of the hollowed-out part of the second fixture 22. The welding pin fixing assembly is provided with two groups, which are respectively located above and below the slider 224. The X-axis displacement assembly 212 is provided with a protrusion 2121 and a horizontal portion 2122 above and below the slide rail 213. Since the spring sheet 223 is fixed by the rotating shaft 222 and can rotate around the rotating shaft 222 when subjected to force, when the second fixture 22 is subjected to horizontal movement by external force, the protrusion 2121 on the X-axis displacement assembly 212 presses the spring sheet 223, causing the spring sheet 223 to deform and thus compress the welding needle at the second welding needle hole 221, thereby compressing it. Due to the above arrangement, the width of the positioning surface 2152 of the positioning block 215 must be satisfied that after the second fixture 22 is subjected to horizontal movement by external force and the spring sheet 223 is deformed and thus compresses the welding needle 5, the welding needle 5 leaves the positioning surface 2152 and becomes suspended in the air. After such arrangement, it is convenient to position the height of the flat end of the welding needle 5. Specifically, after the welding needle 5 is placed in the second welding needle hole 221, the flat end of the welding needle 5 contacts the positioning surface 2152. When the welding needle 5 is horizontally moved to the top of the second cutter head, the flat end of the welding needle 5 contacts the second cutter head, thereby achieving grinding, thereby eliminating the process of positioning the flat end of the welding needle 5 each time.

[0047] Preferably, the second grinding unit further includes a return spring 27, one end of which is fixed to the X-axis displacement assembly 212, and the other end is fixedly connected to the second fixture 22 through a fixed column 225; the fixed column 225 is a column protruding from the second fixture 22 toward the X-axis displacement assembly 212; when the spring 223 abuts against one of the horizontal portions 2122, the return spring 27 has no elastic deformation. The return spring 27 provides a restoring force for the reciprocating motion, and when the grinding is completed, the second fixture 22 will return to its original position under the action of the return spring 27.

[0048] As a preferred embodiment, the second grinding unit 2 also includes a second collecting structure 26, which includes a second connecting tube 261 and a second guide tube 262. The pipe mouth of the second connecting tube 261 is located directly below the second cutter head, one end of the second guide tube 262 is connected to the second connecting tube 261, and the other end is connected to the storage member 135; the present invention also preferably designs the positioning block 215 as a U-shaped structure, and the two sides of the U-shaped structure are arranged on both sides of the length direction of the second cutter 25 to form a shielding portion for shielding debris. The debris generated during the grinding process is blocked by the positioning block 215 and falls to the pipe mouth of the second connecting tube 261, and then falls into the storage member 135 through the second guide tube 262, thereby collecting the debris and preventing dust hazards.

[0049] The method for grinding a welding needle using the dressing device of the present invention comprises the following steps:

[0050] (1) Device adjustment: The position of the first fixture 12 is adjusted by the first positioning auxiliary installation module 11, so that when the welding needle 5 is installed in the first fixture 12, the welding needle 5 is located directly above the inner R angle of the first tool 14, so that the axis of the semicircular head end of the welding needle 5 coincides with the rotation axis of the first tool 14; the positioning surface 2152 of the positioning block 215 is adjusted to be slightly lower than the section surface of the highest point of the second tool head, and the height difference is the cutting amount of the flat head end;

[0051] (2) Grinding the semi-circular head of the welding needle: The welding needle 5 is placed in the first welding needle hole 121 with the semi-circular head facing downward. When the first tool 14 is driven by the first rotary drive mechanism 15, the welding needle 5 is manually pressed down together with the first fixture 12 so that the round head of the welding needle 5 contacts the inner R angle of the first tool 14, thereby grinding the semi-circular head of the welding needle 5; the generated debris is collected by the first collection mechanism 13;

[0052] (3) Grinding the flat end of the welding needle: The second fixture 22 is pushed to move horizontally, and the protrusion 2121 on the X-axis displacement assembly 212 presses the spring sheet 223, causing the spring sheet 223 to deform and thereby press the welding needle 5 at the second welding needle hole 221. At the same time, the welding needle 5 moves to contact the second tool 25, thereby grinding the flat end of the welding needle 5; the generated debris is collected by the second collection mechanism 26.

[0053] The above description is a detailed description of the preferred feasible embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modified changes completed under the technical spirit suggested by the present invention should fall within the patent scope covered by the present invention.

Claims

1. A welding needle trimming device, characterized in that: The invention comprises a first grinding unit, which can grind the semicircular head of the welding needle. The first grinding unit comprises a vertically set bottom plate, a first auxiliary installation and positioning module, a first tool and a first rotary drive mechanism. The first auxiliary installation and positioning module is installed on the bottom plate. The first auxiliary installation and positioning module is fixedly connected to the first fixture. The first fixture is provided with a first welding needle hole penetrating through the upper and lower end surfaces thereof. The lower part of the first welding needle hole is a stepped through hole which is wide at the top and narrow at the bottom. The diameter of the narrower part of the stepped through hole is smaller than the diameter of the thicker part of the welding needle, so as to limit the welding needle. The first rotary drive mechanism comprises a first rotary power part, which is connected to a first rotary shaft, which is connected to one end of a first coupling, and a first tool is installed at the other end of the first coupling. The first tool comprises a first tool body and a blade formed at one end of the first tool body. The first tool body is connected to the first coupling. The front side of the blade is a first inclined surface, and the rear side is a second inclined surface. The upper end of the blade is provided with a concave semicircular arc inner R angle, and the front and rear sides of the blade are also provided with a chip removal groove. It also includes a first collecting structure and a horizontal working panel, the first rotating power part is located below the working panel, and the first coupling penetrates the working panel and extends to the top of the working panel; the first collecting structure includes a cyclone generating member, a collecting member, a first connecting pipe, a first guide pipe and a storage member; the cyclone generating member is a trumpet-shaped member that is narrow at the top and wide at the bottom, and is arranged on the outside of the first coupling, the inner side of the narrower part of the trumpet shape is fixedly connected to the outside of the first coupling, and a number of air inlets are provided on the trumpet-shaped side wall of the cyclone generating member, and an air outlet gap is left between the lower end of the cyclone generating member and the working panel; the collecting member is a pipe member with a spiral inner circle, the collecting member cover is arranged on the outside of the cyclone generating member, the lower end of the collecting member is sealed and fixed to the working panel, and the collecting member is provided with a downwardly inclined first connecting pipe at the maximum spiral point, the first connecting pipe is connected to the first guide pipe, and the first guide pipe is connected to the storage member.

2. The welding needle trimming device according to claim 1, characterized in that: The first fixture can achieve relative displacement and positioning with the first tool through the auxiliary positioning module, and its directions include X, Y and Z axes.

3. The welding needle trimming device according to claim 1, characterized in that: The first tool body is cylindrical, and chip removal grooves are provided on the front and rear sides of the blade.

4. The welding needle trimming device according to claim 1, characterized in that: It also includes a second grinding unit, which includes a second auxiliary positioning and mounting module, a second fixture, a second tool and a second rotation drive mechanism; the second auxiliary positioning and mounting module is mounted on the base plate, and the second auxiliary positioning and mounting module is horizontally slidably connected to the second fixture on the side away from the base plate, and the second fixture is provided with a second welding pin hole that passes through the upper and lower end surfaces of the second fixture, and the second fixture is also provided with a welding pin fixing assembly for fixing the welding pin; the second rotation drive mechanism is arranged below the second auxiliary positioning and mounting module, the rotation axis of the second rotation drive mechanism is horizontally arranged, and is horizontally connected to the second tool through a second coupling, the second tool includes a second tool body and a second tool head, the second tool head is cylindrical, and the second tool head is located below the second fixture.

5. The welding needle trimming device according to claim 4, characterized in that: The second auxiliary positioning and installation module It includes a base, an X-axis displacement component, and a positioning block; the base is installed on the bottom plate, the X-axis displacement component is arranged on the side of the base away from the bottom plate, the X-axis displacement component is slidably connected with the base along the X-axis, and a plurality of threaded holes are opened on the X-axis displacement component, the threads in the threaded holes are connected with fixing bolts, the fixing bolts abut against the base, and are used to fix the X-axis displacement component; the positioning block has a mounting portion, the positioning block is mounted on the base through the mounting portion, the upper end of the positioning block has a horizontal positioning surface, the positioning surface is located below the second welding pin hole, and is used to position the lower end of the welding pin.

6. The welding needle trimming device according to claim 5, characterized in that: A slide rail along the X-axis is provided on a side panel of the X-axis displacement component away from the base, and a slider is provided on the second fixture, and the second fixture is slidably connected to the X-axis displacement component through the slider; an operating handle protrudes outward on the side of the second fixture away from the X-axis displacement component.

7. The welding needle trimming device according to claim 6, characterized in that: A raised portion protruding toward the second fixture is provided in the middle of one side of the X-axis displacement component away from the bottom plate, and both sides of the raised portion are non-raised horizontal portions, and an arc-shaped transition is adopted between the raised portion and the horizontal portion; a side of the second fixture facing the X-axis displacement component is a hollowed-out portion formed by hollowing out, so that the second welding pin hole is divided into two holes; the welding pin fixing component includes a spring sheet and a rotating shaft, one end of the spring sheet is fitted and fixed on one side of the bottom wall of the hollowed-out portion, and the spring sheet close to the end is bent and protruded toward the X-axis displacement component and then abuts against one of the horizontal portions, and the other end of the spring sheet extends horizontally to the other side of the bottom wall of the hollowed-out portion and surrounds a rotating shaft, the rotating shaft is vertically arranged inside the second fixture, and the rotating shaft is rotatably connected to the second fixture; the second welding pin hole is located between the bent portion of the spring sheet and the rotating shaft, and the welding pin is clamped between the spring sheet and the bottom wall of the hollowed-out portion of the second fixture; the welding pin fixing component is provided at two locations, respectively located above and below the slider.

8. The welding needle trimming device according to claim 7, characterized in that: The second grinding unit also includes a return spring, one end of which is fixed to the X-axis displacement assembly, and the other end is fixedly connected to the second fixture through a fixed column; the fixed column is a column protruding from the second fixture toward the X-axis displacement assembly; when the spring plate abuts against one of the horizontal parts, the return spring has no elastic deformation; the second grinding unit also includes a second collecting structure, the second collecting structure includes a second connecting tube and a second guide tube, the tube mouth of the second connecting tube is located directly below the second tool head, one end of the second guide tube is connected to the second connecting tube, and the other end is connected to the storage member; the positioning block is a U-shaped structure, and the two sides of the U-shaped structure are arranged on both sides of the length direction of the second tool, so as to block the grinding debris.

9. A method for trimming a welding needle using a trimming device according to any one of claims 4 to 8, characterized in that: The following steps are involved: (1) Device adjustment: The position of the first fixture is adjusted by the first auxiliary positioning and installation module, so that when the welding needle is installed in the first fixture, the welding needle is located directly above the inner R angle of the first tool, so that the axis of the semicircular head end of the welding needle coincides with the rotation axis of the first tool; the positioning surface of the positioning block is adjusted to be slightly lower than the section surface of the highest point of the second tool head, and the height difference is the cutting amount of the flat head end; (2) Grinding the semi-circular head of the welding needle: the semi-circular head of the welding needle is placed downward in the first welding needle hole. When the first tool is driven by the first rotary drive mechanism, the welding needle and the first fixture are manually pressed down so that the round head of the welding needle contacts the inner R angle of the first tool, thereby grinding the semi-circular head of the welding needle; the generated debris is collected by the first collection mechanism; (3) Grinding the flat end of the welding needle: Push the second fixture to move horizontally, and the raised portion on the X-axis displacement assembly presses the spring sheet, causing the spring sheet to deform and thereby press the welding needle at the second welding needle hole. At the same time, the welding needle moves to contact the second tool, thereby grinding the flat end of the welding needle; the generated debris is collected by the second collection mechanism.

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