Linkage mechanism, laser marking machine and laser marking method

Abstract

The present invention discloses a linkage mechanism, a laser engraving machine and a laser engraving method, wherein a product to be processed is mounted on a first driving member, and the product to be processed is rotated by the first driving member so that the engraving end of the engraving body can effectively act on the surface of the product to be processed. Since the distance between the surface of the product to be processed and the engraving end of the engraving body will change during the rotation of the product to be processed, which will lead to inconsistent laser focus and uneven laser etching energy. Therefore, the linkage mechanism drives the first driving member to move along the first direction through the second driving member, so that the position coordinates of the product to be processed in the first direction are reasonably compensated, so that the distance between the surface of the product to be processed and the engraving end of the engraving body remains unchanged during the rotation of the product to be processed, which is conducive to the laser engraving machine to effectively engrave on the tubular product to be processed.

Description

Technical Field

[0001] The present invention relates to the field of laser marking technology, and in particular to a linkage mechanism, a laser marking machine and a laser marking method. Background Art

[0002] Laser engraving machines can "carve" traces by evaporating the surface material to reveal the deeper material, or by using light energy to cause chemical and physical changes in the surface material, or by using light energy to burn off part of the material to reveal the desired pattern or text. However, traditional laser engraving machines can only perform laser on the 2D plane of the object and cannot engrave on tubular objects. Summary of the invention

[0003] Based on this, it is necessary to provide a linkage mechanism, a laser marking machine and a laser marking method, which are convenient for marking a tubular object.

[0004] The technical solution is as follows:

[0005] In one embodiment, a linkage mechanism includes: a first driving structure, the first driving structure includes a first driving member, the output end of the first driving member is used for transmission connection with the product to be processed, and the first driving member is used to drive the product to be processed to rotate; and a second driving structure, the first driving structure is mounted on the second driving structure, wherein the second driving structure includes a second driving member, the output end of the second driving member is transmission connected to the first driving member, and the first driving member moves along a first direction under the drive of the second driving member.

[0006] The above linkage mechanism installs the product to be processed on the first driving member, and rotates the product to be processed through the first driving member so that the imprinting end of the imprinting body can effectively act on the surface of the product to be processed. Since the distance between the surface of the product to be processed and the imprinting end of the imprinting body will change during the rotation of the product to be processed, which will lead to inconsistent laser focus and uneven laser etching energy. Therefore, this linkage mechanism drives the first driving member to move along the first direction through the second driving member, so that the position coordinates of the product to be processed in the first direction are reasonably compensated, so that the distance between the surface of the product to be processed and the imprinting end of the imprinting body remains unchanged during the rotation of the product to be processed, which is conducive to the laser engraving machine to effectively engrave on the tubular product to be processed.

[0007] In one embodiment, the first driving structure further includes a mounting assembly, the mounting assembly is drivingly connected to an output end of the second driving member, and the first driving member is mounted on the mounting assembly.

[0008] In one embodiment, the linkage mechanism further includes a third driving member and a first toggle member, the third driving member is mounted on the mounting assembly, the first toggle member is transmission-connected to an output end of the third driving member, and the first toggle member is used to toggle the second toggle member on the fixture.

[0009] In one embodiment, the mounting assembly includes a first mounting seat, a first base and a supporting member, the supporting member is mounted on the first mounting seat through the first base, the first mounting seat is transmission-connected to the output end of the second driving member, and the first driving member is mounted on the supporting member.

[0010] In one embodiment, the linkage mechanism also includes a fourth driving member and a second mounting seat, the second mounting seat is transmission-connected to the output end of the fourth driving member, the second driving structure is mounted on the second mounting seat, and the second driving structure is driven by the fourth driving member to move along a second direction, and the second direction is arranged perpendicular to the first direction.

[0011] In one embodiment, a laser marking machine includes a marking body, a fixture and the linkage mechanism described above, wherein the linkage mechanism is installed on the marking body, and the fixture is installed on the output end of the first driving member.

[0012] The above-mentioned laser engraving machine adopts the above-mentioned linkage mechanism to install the product to be processed on the first driving member, and through the first driving member, the product to be processed is rotated so that the engraving end of the engraving body can effectively act on the surface of the product to be processed. Since the distance between the surface of the product to be processed and the engraving end of the engraving body will change during the rotation of the product to be processed, which will lead to inconsistent laser focus and uneven laser etching energy. Therefore, this linkage mechanism drives the first driving member to move along the first direction through the second driving member, so that the position coordinates of the product to be processed in the first direction are reasonably compensated, so that during the rotation of the product to be processed, the distance between the surface of the product to be processed and the engraving end of the engraving body remains unchanged, which is conducive to the laser engraving machine to effectively engrave on the tubular product to be processed.

[0013] In one embodiment, the linkage mechanism includes a third driving member and a first toggle member, the first toggle member is transmission-connected to the output end of the third driving member, the clamp includes a first fixed portion, a second fixed portion, an elastic support assembly, a transmission member and a second toggle member mounted on the transmission member, the first fixed portion is supported on the second fixed portion through the elastic support assembly, the transmission member is transmission-connected to the elastic support assembly, and when the first toggle member toggle the second toggle member, the first fixed portion moves closer to the second fixed portion.

[0014] In one embodiment, the elastic support assembly includes an elastic member, a support member and a resistance portion installed on the support member, the second fixed portion is provided with a mounting hole, the support member is installed on the first fixed portion, and one end of the support member away from the first fixed portion is inserted into the mounting hole, the elastic member is arranged between the first fixed portion and the second fixed portion, the transmission member is slidably installed on the second fixed portion along a third direction, and the transmission member is provided with a resistance surface that cooperates with the resistance portion, and the resistance surface is inclined relative to the third direction.

[0015] In one embodiment, a laser marking method, using the laser marking machine described above, comprises the following steps: fixing the product to be processed on the fixture; rotating the product to be processed by the first driving member; moving the position measuring device along the first direction so that the measuring end of the position measuring device contacts the surface of the product to be processed, and obtaining the position data of the surface of the product to be processed; when the product to be processed rotates by a preset angle θ for the nth time, measuring the position data of the surface of the product to be processed by the position measuring device, and the obtained position data is D n , wherein n is a natural number; according to the position data D n , and obtain the position data difference ΔZ of the surface of the product to be processed n =D n -D n-1 , where n is a natural number; the initial position data difference ΔZ0 is set to 0, and the corresponding relationship between the rotation time and the position data difference is obtained according to the function of the rotation time t and the preset angle θ, and the relationship between the rotation time and the position data difference is processed to obtain the function of the surface position change rate and the rotation time of the product to be processed during the rotation process: V=f(t); the function of the surface position change rate and the rotation time is negatively valued, and the obtained function is -V=-f(t)=g(t), and the -V=g(t) function is input into the controller, and the second driving member is controlled by the controller so that the first driving member moves along the first direction according to the -V=g(t) function; the product to be processed is engraved by the engraving body.

[0016] The above-mentioned laser marking method fixes the product to be processed on the fixture, rotates the product to be processed through the first driving member, and then moves the position measuring device along the first direction, so that the position data of the measuring end of the position measuring device and the surface of the product to be processed are obtained. When the product to be processed rotates by a preset angle θ, the position data of the surface of the product to be processed along the first direction are measured by the position measuring device, and the obtained position data are processed to obtain the function of the surface position change rate and the rotation time of the product to be processed during the rotation process. Since the position data measured by the position measuring device is the position data of the surface of the product to be processed, it is necessary to negate the function of the surface position change rate and the rotation time during the actual marking process, and the obtained function is input into the controller. In this way, the controller controls the second driving member according to the input function relationship, so that the first driving member moves along the first direction according to the -V=g(t) function, so that the distance between the surface of the product to be processed and the engraving end of the engraving body remains unchanged during the rotation of the product to be processed, which is conducive to the laser engraving machine to effectively engrave on the tubular product to be processed.

[0017] In one embodiment, a laser engraving method, using the laser engraving machine described above, includes the following steps: dividing the surface of the product to be processed into one or more cylindrical surface areas and one or more plane areas, and determining the axis of the cylindrical surface area; fixing the product to be processed on the fixture, and controlling the rotation axis of the first driving member to be coaxial with the axis of the cylindrical surface area; rotating the product to be processed through the first driving member so that the engraving body engraves the cylindrical surface area; controlling the plane area to be perpendicular to the first direction through the first driving member, and engraving the plane area through the engraving body.

[0018] The above-mentioned laser marking method divides the surface of the product to be processed into a cylindrical surface area and a plane area. For the marking of the cylindrical surface area, the axis of the cylindrical surface area is aligned with the rotation axis of the first driving member, so that when the first driving member drives the product to be processed to rotate, the distance between the cylindrical surface area of ​​the product to be processed and the marking end of the marking body remains unchanged, thereby facilitating the marking of the cylindrical surface area of ​​the product to be processed by the marking body; and for the marking of the plane area, the first driving member is used to make the plane area perpendicular to the first direction, so that the distance between the plane area and the marking end of the marking body remains unchanged, which is conducive to the effective marking of the marking body in the plane area. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of a linkage mechanism according to an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of the structure of the first driving structure and the third driving member according to an embodiment of the present invention;

[0021] Figure 3 It is a schematic diagram of the cooperation between the linkage mechanism and the clamp according to an embodiment of the present invention;

[0022] Figure 4 It is a schematic structural diagram of a clamp, a first driving structure and a third driving member according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of a fixture structure according to an embodiment of the present invention;

[0024] Figure 6 A partial cross-sectional view of a clamp structure according to an embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of a product to be processed according to an embodiment of the present invention;

[0026] Figure 8 It is a schematic diagram of a product to be processed before and after rotation according to an embodiment of the present invention;

[0027] Fig. 9 This is a schematic structural diagram of a product to be processed according to another embodiment of the present invention;

[0028] Fig.10 A curve diagram showing the relationship between the position data difference and the rotation time according to an embodiment of the present invention;

[0029] Fig.11 A curve diagram showing the relationship between the absolute value of the position data difference and the rotation time according to an embodiment of the present invention;

[0030] Fig.12 A flow chart of a laser marking method according to an embodiment of the present invention;

[0031] Fig.13 This is a flow chart of a laser marking method according to another embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 100, linkage mechanism, 110, first driving structure, 111, first driving member, 112, mounting assembly, 1121, first mounting seat, 1122, first base, 1123, bearing member, 113, first drag chain, 120, second driving structure, 121, second driving member, 122, first support frame, 123, first screw rod, 124, second drag chain, 130, fourth driving member, 131, second support frame, 132, second screw rod, 14 0. third driving member, 141. first toggle member, 150. second mounting seat, 200. clamp, 210. first fixing portion, 220. second fixing portion, 221. mounting hole, 222. guide groove, 230. elastic supporting assembly, 231. supporting member, 232. elastic member, 233. interference portion, 240. transmission member, 241. interference surface, 250. second toggle member, 300. product to be processed, 310. cylindrical surface area, 320. plane area. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described herein are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0035] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0037] The “first” and “second” mentioned in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0038] In one embodiment, please refer to Figure 1 and Figure 7A linkage mechanism 100 includes: a first driving structure 110 and a second driving structure 120. The first driving structure 110 includes a first driving member 111. The output end of the first driving member 111 is used for transmission connection with the product to be processed 300, and the first driving member 111 is used to drive the product to be processed 300 to rotate. The first driving structure 110 is installed on the second driving structure 120, wherein the second driving structure 120 includes a second driving member 121. The output end of the second driving member 121 is transmission connected to the first driving member 111. The first driving member 111 moves along the first direction under the drive of the second driving member 121.

[0039] The linkage mechanism 100 described above mounts the product to be processed 300 on the first driving member 111, and the product to be processed 300 is rotated by the first driving member 111, so that the imprinting end of the imprinting body can effectively act on the surface of the product to be processed 300. Since the distance between the surface of the product to be processed 300 and the imprinting end of the imprinting body will change during the rotation of the product to be processed 300, which will lead to inconsistent laser focus, and then to uneven laser etching energy. Therefore, the linkage mechanism 100 of this embodiment drives the first driving member 111 to move along the first direction through the second driving member 121, so that the position coordinates of the product to be processed 300 in the first direction are reasonably compensated, so that the distance between the surface of the product to be processed 300 and the imprinting end of the imprinting body remains unchanged during the rotation of the product to be processed 300, which is conducive to the laser marking machine to effectively imprint on the tubular product to be processed 300. Specifically in this embodiment, the first direction is the Z-axis direction.

[0040] Optionally, the first driving component 111 is a DC motor, an asynchronous motor or a synchronous motor; the second driving component 121 is a hydraulic cylinder, a pneumatic cylinder, a motor or other driving equipment.

[0041] For further information, please refer to Figure 1 and Figure 2 , the first driving structure 110 also includes a mounting assembly 112. The mounting assembly 112 is drivingly connected to the output end of the second driving member 121. The first driving member 111 is mounted on the mounting assembly 112. In this way, the first driving member 111 is stably mounted through the mounting assembly 112, which is conducive to the first driving member 111 stably driving the product 300 to be processed to rotate. At the same time, through the mounting assembly 112, it is also conducive to the second driving member 121 to stably drive the first driving member 111 to move along the first direction. Specifically in this embodiment, the first driving structure 110 also includes a first drag chain 113, and the first drag chain 113 is mounted on the mounting assembly 112. In this way, the first drag chain 113 effectively prevents the wires from being broken or pinched off during movement.

[0042] Furthermore, the linkage mechanism 100 further includes a third driving member 140 and a first toggle member 141. The third driving member 140 is mounted on the mounting assembly 112. The first toggle member 141 is in transmission connection with the output end of the third driving member 140, and the first toggle member 141 is used to toggle the second toggle member 250 on the fixture 200. In this way, the first toggle member 141 is driven to move by the third driving member 140, and the second toggle member 250 on the fixture 200 is toggled, so that the first fixing portion 210 and the second fixing portion 220 on the fixture 200 are brought closer, thereby facilitating the installation of the product 300 to be processed on the fixture 200.

[0043] Optionally, the third driving member 140 is a hydraulic cylinder, a cylinder, a motor or other driving device. At the same time, the first toggle member 141 can toggle the second toggle member 250 by moving or rotating. When the first toggle member 141 rotates to toggle the second toggle member 250, the first toggle member 141 is rotationally connected to the installation assembly 112, and the first toggle member 141 is also rotationally connected to the output end of the third driving member 140. It can be seen that during the installation of the product 300 to be processed, the first toggle member 141 rotates to toggle the second toggle member 250, so that the first fixing portion 210 and the second fixing portion 220 on the clamp 200 are brought closer, so that it is more convenient for the first toggle member 141 to toggle the second toggle member 250.

[0044] In one embodiment, please refer to Figure 2 The mounting assembly 112 includes a first mounting seat 1121, a first base 1122 and a bearing member 1123. The bearing member 1123 is mounted on the first mounting seat 1121 through the first base 1122. The first mounting seat 1121 is in transmission connection with the output end of the second driving member 121. The first driving member 111 is mounted on the bearing member 1123. In this way, the first mounting seat 1121, the first base 1122 and the bearing member 1123 enable the first driving member 111 to be mounted more stably, so that the product 300 to be processed can rotate more stably on the first driving member 111.

[0045] For further information, please refer to Figure 2 and Figure 3 The linkage mechanism 100 further includes a third driving member 140 and a first toggle member 141 rotatably connected to the output end of the third driving member 140. The first toggle member 141 is rotatably mounted on the carrier 1123. The third driving member 140 is mounted on the carrier 1123, and the output end of the third driving member 140 is disposed through the carrier 1123. In this way, it is convenient for the third driving member 140 to drive the first toggle member 141 to rotate on the carrier 1123, so as to facilitate the installation of the product 300 to be processed on the fixture 200.

[0046] In one embodiment, please refer to Figure 1, the linkage mechanism 100 also includes a fourth driving member 130 and a second mounting seat 150. The second mounting seat 150 is transmission-connected to the output end of the fourth driving member 130. The second driving structure 120 is mounted on the second mounting seat 150. Driven by the fourth driving member 130, the second driving structure 120 moves along the second direction, and the second direction is perpendicular to the first direction. It can be seen that the linkage mechanism 100 of this embodiment can not only rotate the product 300 to be processed, but also move along two perpendicular directions respectively, so that the degree of freedom of the product 300 to be processed is higher, which facilitates the product 300 to be processed to be more flexible during the processing. Specifically in this embodiment, the first direction is the Z-axis direction, and the second direction is the X-axis direction. Through the fourth driving member 130, the product 300 to be processed is moved to the engraving range of the laser engraving machine. At the same time, the second driving structure 120 also includes a first support frame 122 and a first screw rod 123. The second driving member 121 is installed on the second mounting seat 150 through the first support frame 122, so that the second driving member 121 is stably fixed, which is conducive to the stable operation of the second driving member 121. The output end of the second driving member 121 is connected to the first screw rod 123. The first screw rod 123 is threadedly connected to the first mounting seat 1121, so that the second driving member 121 drives the first driving member 111 to move along the first direction in a screw transmission manner. In addition, the second driving structure 120 also includes a second drag chain 124, and the second drag chain 124 is installed on the second mounting seat 150. In this way, the second drag chain 124 effectively prevents the wire from breaking or pinching during the movement.

[0047] Optionally, the fourth driving member 130 is a hydraulic cylinder, a pneumatic cylinder, a motor or other driving devices.

[0048] Furthermore, the linkage mechanism 100 further includes a second support frame 131 and a second screw rod 132, and the fourth driving member 130 is mounted on the second support frame 131, so that the fourth driving member 130 is stably fixed, which is conducive to the stable operation of the fourth driving member 130. The output end of the fourth driving member 130 is connected to the second screw rod 132. The second screw rod 132 is threadedly connected to the second mounting seat 150, so that the fourth driving member 130 drives the second driving structure 120 to move along the second direction in a screw transmission manner.

[0049] In one embodiment, please refer to Figure 1 , Figure 3 and Figure 4 A laser engraving machine includes an engraving body, a fixture 200 and a linkage mechanism 100 in any of the above embodiments. The linkage mechanism 100 is mounted on the engraving body. The fixture 200 is mounted on the output end of the first driving member 111.

[0050] The above-mentioned laser marking machine adopts the above-mentioned linkage mechanism 100, and the product to be processed 300 is installed on the first driving member 111. Through the first driving member 111, the product to be processed 300 is rotated so that the imprinting end of the imprinting body can effectively act on the surface of the product to be processed 300. Since the distance between the surface of the product to be processed 300 and the imprinting end of the imprinting body will change during the rotation of the product to be processed 300, which will lead to inconsistent laser focus, and then lead to uneven laser etching energy. Therefore, the linkage mechanism 100 drives the first driving member 111 to move along the first direction through the second driving member 121, so that the position coordinates of the product to be processed 300 in the first direction are reasonably compensated, so that during the rotation of the product to be processed 300, the distance between the surface of the product to be processed 300 and the imprinting end of the imprinting body remains unchanged, which is conducive to the laser marking machine to effectively imprint on the tubular product to be processed 300. Specifically in this embodiment, the laser marking machine also includes a controller, which is electrically connected to the first driving member 111 and the second driving member 121 respectively. The controller may be a programmable logic controller (PLC for short).

[0051] For further information, please refer to Figure 4 , Figure 5 and Figure 6 The linkage mechanism 100 includes a third driving member 140 and a first toggle member 141. The first toggle member 141 is transmission-connected to the output end of the third driving member 140. The clamp 200 includes a first fixed portion 210, a second fixed portion 220, an elastic support assembly 230, a transmission member 240, and a second toggle member 250 mounted on the transmission member 240. The first fixed portion 210 is supported on the second fixed portion 220 through the elastic support assembly 230. The transmission member 240 is transmission-connected to the elastic support assembly 230. When the first toggle member 141 toggle the second toggle member 250, the first fixed portion 210 moves closer to the second fixed portion 220. It can be seen that when the first toggle member 141 toggles the second toggle member 250, the transmission member 240 transmits the elastic support assembly 230, so that the first fixed part 210 moves closer to the second fixed part 220, thereby reducing the volume of the clamp 200, which is beneficial for the operator to put the product 300 to be processed on the clamp 200. When the first toggle member 141 does not toggle the second toggle member 250, since the first fixed part 210 is supported on the second fixed part 220 by the elastic support assembly 230, the first fixed part 210 is moved away from the second fixed part 220 under the action of the elastic support assembly 230, so that the product 300 to be processed is stably supported, thereby completing the installation of the product 300 to be processed.

[0052] Optionally, the first fixed part 210 can be directly mounted on the surface of the second fixed part 220 or in the mounting hole 221 on the second fixed part 220 through the elastic support assembly 230. When the first fixed part 210 is mounted in the mounting hole 221 on the second fixed part 220 through the elastic support assembly 230, the connection between the first fixed part 210 and the second fixed part 220 is more stable. At the same time, the transmission member 240 can transmit the elastic support assembly 230 in a translational manner or a rotational manner, so that the first fixed part 210 moves closer to the second fixed part 220. Specifically in this embodiment, when the transmission member 240 rotates the elastic support assembly 230 in a rotational manner, the rotating member is rotatably mounted on the second fixed part 220, and the rotating member includes a first rotating part and a second rotating part arranged at an angle, the first rotating part is rotationally connected to the elastic support assembly 230, and the second rotating part is connected to the second toggle member 250. It can be seen that when the second shifting member 250 is shifted, the second rotating part drives the first rotating part to rotate, and the first rotating part drives the elastic support component 230 to move, so that the elastic support component 230 is compressed, thereby making the first fixed part 210 move closer to the second fixed part 220.

[0053] For further information, please refer to Figure 5 and Figure 6 The elastic support assembly 230 includes an elastic member 232, a support member 231 and a resistance portion 233 mounted on the support member 231. A mounting hole 221 is provided on the second fixed portion 220. The support member 231 is mounted on the first fixed portion 210, and one end of the support member 231 away from the first fixed portion 210 is inserted into the mounting hole 221. The elastic member 232 is arranged between the first fixed portion 210 and the second fixed portion 220. The transmission member 240 is slidably mounted on the second fixed portion 220 along the third direction, and a resistance surface 241 that is in resistance with the resistance portion 233 is provided on the transmission member 240. The resistance surface 241 is inclined relative to the third direction. It can be seen from this that the first toggle member 141 toggle the second toggle member 250 to move, driving the transmission member 240 to move along the third direction on the second fixed portion 220. Since the transmission member 240 is provided with a contact surface 241 that contacts the contact portion 233, and the contact surface 241 is inclined relative to the third direction, the transmission member 240 will cause the contact portion 233 to move away from the first fixing portion 210 during movement, so that the elastic member 232 is compressed, thereby causing the first fixing portion 210 to move closer to the second fixing portion 220. Figure 5 For example, the third direction is Figure 5 The S indicates the direction.

[0054] Optionally, the contact surface 241 is inclined relative to the third direction and has two inclined states, that is, the angle between the contact surface 241 and the third direction is an acute angle or the angle between the contact surface 241 and the third direction is an obtuse angle. Figure 5 For example, when the angle between the contact surface 241 and the third direction is an acute angle, that is, the contact surface 241 is Figure 5 The left side of the middle straight line L1, at this time, when the transmission member 240 moves along the direction indicated by S, the first fixing portion 210 moves closer to the second fixing portion 220; when the angle between the contact surface 241 and the third direction is an obtuse angle, that is, the contact surface 241 is Figure 5 On the right side of the center line L1 , when the transmission member 240 moves in the direction opposite to that indicated by S, the first fixing portion 210 moves closer to the second fixing portion 220 .

[0055] In one embodiment, the second fixing portion 220 is provided with a guide groove 222 that is connected to the mounting hole 221. The abutment portion 233 is guided and matched with the guide groove 222. Thus, the abutment portion 233 can move stably through the guide groove 222. At the same time, the abutment portion 233 can be connected to the transmission member 240 through the guide groove 222.

[0056] In one embodiment, please refer to Figure 7 , Figure 8 and Fig.12 A laser marking method, using the above laser marking machine, comprises the following steps:

[0057] S11: Fix the product 300 to be processed on the fixture 200;

[0058] S12: The product 300 to be processed is rotated by the first driving member 111;

[0059] S13: moving the position measuring device along the first direction so that the measuring end of the position measuring device contacts the surface of the product 300 to be processed, and acquiring position data of the surface of the product 300 to be processed;

[0060] S14: When the product 300 to be processed rotates by the preset angle θ for the nth time, the surface position data of the product 300 to be processed is measured by the position measuring device, and the obtained position data is D n , where n is a natural number;

[0061] S15: According to the position data D n , the position data difference ΔZ of the surface of the product 300 to be processed is obtained n =D n -D n-1 , where n is a natural number;

[0062] S16: The initial position data difference ΔZ0 is set to 0, and the corresponding relationship between the rotation time and the position data difference is obtained according to the function of the rotation time t and the preset angle θ, and the rotation time and the position data difference are processed to obtain the function of the surface position change rate and the rotation time of the product 300 to be processed during the rotation process: V=f(t);

[0063] S17: taking a negative value of the function of the surface position change rate and the rotation time, the obtained function is -V=-f(t)=g(t), and inputting the -V=g(t) function into the controller, and controlling the second driving member 121 through the controller, so that the first driving member 111 moves along the first direction according to the -V=g(t) function;

[0064] S18: Mark the product 300 to be processed by marking the main body.

[0065] The above-mentioned laser marking method fixes the product 300 to be processed on the fixture 200, rotates the product 300 through the first driving member 111, and then moves the position measuring device along the first direction so that the measuring end of the position measuring device and the position data of the surface of the product 300 to be processed are measured. When the product 300 to be processed rotates by a preset angle θ, the position measuring device measures the position data of the surface of the product 300 to be processed in the first direction. For the specific structure, please refer to Fig. 9 , the obtained position data is processed to obtain the function of the surface position change rate and the rotation time of the product to be processed 300 during the rotation process. Since the position data measured by the position measuring device is the position data of the surface of the product to be processed 300, it is necessary to negate the function of the surface position change rate and the rotation time during the actual marking process, and the final function is input into the controller. In this way, the controller controls the second driving member 121 according to the input function relationship, so that the first driving member 111 moves along the first direction according to the -V=g(t) function, so that the distance between the surface of the product to be processed 300 and the marking end of the marking body remains unchanged during the rotation of the product to be processed 300, which is conducive to the laser marking machine to effectively mark on the tubular product to be processed 300. Among them, the preset angle θ can be 1° to 10°. Specifically in this embodiment, the preset angle θ is 2°. The controller of this embodiment is a programmable logic controller (PLC for short). Meanwhile, the position measuring device may be a photoelectric encoder circular grating, a metering grating, a coding disk, a rotary transformer disc induction synchronizer or other position measuring devices. Wherein, D0 is the initial surface position data of the product 300 to be processed when the product 300 to be processed is not rotating.

[0066] Further, the initial position data difference ΔZ0 is set to 0, and the corresponding relationship between the rotation time and the position data difference is obtained according to the function of the rotation time t and the preset angle θ, and the rotation time and the position data difference are processed to obtain the function of the surface position change rate and the rotation time of the product 300 to be processed during the rotation process: V=f(t) The step S16 includes: according to the function of the rotation time t and the preset angle θ: Wherein: T is the rotation period, the corresponding relationship between the rotation time and the position data difference is obtained, and the rotation time and the position data difference are fitted with a function, and the obtained fitting function is derived to obtain the function of the surface position change rate and the rotation time of the product to be processed during the rotation process: V=f(t).

[0067] In one embodiment, before the step of fixing the product 300 to be processed on the fixture 200 (S11), the output axis of the first driving member 111 is parallel to the Y axis of the working platform, the output axis of the second driving member 121 is parallel to the Z axis of the working platform, and the output axis of the fourth driving member 130 is parallel to the X axis of the working platform. This is conducive to improving the operating accuracy of the laser engraving machine.

[0068] Specifically, please refer to Figure 7 and Figure 8 , Figure 7 The symmetrical tubular product 300 to be processed is symmetrical about the center line L. In order to facilitate the processing of the product 300, the center O of the product 300 to be processed is located on the output end axis of the first driving member 111 in this embodiment. Since the product 300 to be processed in this embodiment is symmetrical about the center line L, the rotation angle of this embodiment is 180°. At the same time, the preset angle θ is 2°, and the rotation period T is 360s. The position data ΔZ obtained by the above laser engraving method n and the rotation time T, and plot it as Fig.10 .from Fig.10 It can be seen that the position data ΔZ obtained by the laser marking method n The data is half positive and half negative, where the position data ΔZ n The positive and negative values ​​of represent the opposite driving direction of the second driving member 121. In order to simplify the laser marking process, when the rotation angle of the first driving member 111 is 88° or 90°, that is, when the product 300 to be processed just rotates to the symmetry plane, the second driving member 121 is controlled to be opposite to the original direction. At this time, the position data ΔZ of this embodiment n Then all positive values ​​are needed. In this way, the position data |ΔZ is obtained n | and the rotation time T, and plot it as Fig.11 Next, the position data |ΔZ n|The relationship between the surface position change rate and the rotation time T is fitted, and the obtained fitting function is derived to obtain the function of the surface position change rate and the rotation time:

[0069]

[0070] Finally, the function V=f(t) is negatively valued to obtain -V=-f(t)=g(t), thereby enabling the laser marking machine to effectively mark the tubular product 300 to be processed.

[0071] In one embodiment, please refer to Figure 1 , Figure 2 , Fig.10 and Fig.13 A laser marking method, using the above laser marking machine, comprises the following steps:

[0072] S21: Divide the surface of the product to be processed 300 into one or more cylindrical surface areas 310 and one or more plane areas 320, and determine the axis of the cylindrical surface area 310;

[0073] S22: Fix the product 300 to be processed on the fixture 200, and control the rotation axis of the first driving member 111 to be coaxial with the axis of the cylindrical surface area 310;

[0074] S23: rotating the product 300 to be processed by the first driving member 111, so that the marking body marks the cylindrical surface area 310;

[0075] S24: Control the plane area 320 to be perpendicular to the first direction through the first driving member 111, and engrave the plane area 320 through the engraving body.

[0076] The above-mentioned laser marking method divides the surface of the product to be processed 300 into a cylindrical surface area 310 and a plane area 320. For the marking of the cylindrical surface area 310, the axis of the cylindrical surface area 310 is aligned with the rotation axis of the first driving member 111, so that when the first driving member 111 drives the product to be processed 300 to rotate, the distance between the cylindrical surface area 310 of the product to be processed 300 and the marking end of the marking body remains unchanged, thereby facilitating the marking of the cylindrical surface area 310 of the product to be processed 300 by the marking body; and for the marking of the plane area 320, the first driving member 111 is used to make the plane area 320 perpendicular to the first direction, so that the distance between the plane area 320 and the marking end of the marking body remains unchanged, which is conducive to the effective marking of the marking body on the plane area 320.

[0077] Furthermore, before the product 300 to be processed is fixed on the fixture 200 and the rotation axis of the first driving member 111 is controlled to be coaxial with the axis of the cylindrical surface area 310 (S22), the axis of the output end of the first driving member 111 is parallel to the Y axis of the working platform, the axis of the output end of the second driving member 121 is parallel to the Z axis of the working platform, and the axis of the output end of the fourth driving member 130 is parallel to the X axis of the working platform. This is conducive to improving the operating accuracy of the laser engraving machine.

[0078] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0079] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A laser marking method, characterized in that: A laser engraving machine is used, and the laser engraving machine includes an engraving body, a fixture and a linkage mechanism; The linkage mechanism comprises: A first driving structure, wherein the first driving structure comprises a first driving member, wherein an output end of the first driving member is used for transmission connection with the product to be processed, and the first driving member is used for driving the product to be processed to rotate; a second driving structure, wherein the first driving structure is mounted on the second driving structure, wherein the second driving structure comprises a second driving member, an output end of the second driving member is drivingly connected to the first driving member, and the first driving member moves along a first direction under the driving of the second driving member; The linkage mechanism further includes a fourth driving member and a second mounting seat, the second mounting seat is drivingly connected to the output end of the fourth driving member, the second driving structure is mounted on the second mounting seat, and the second driving structure moves along a second direction under the drive of the fourth driving member, and the second direction is perpendicular to the first direction; The first driving structure further comprises a mounting assembly, the mounting assembly is drivingly connected to the output end of the second driving member, and the first driving member is mounted on the mounting assembly; The linkage mechanism further includes a third driving member and a first toggle member, wherein the third driving member is mounted on the mounting assembly, the first toggle member is transmission-connected to an output end of the third driving member, and the toggle member is used to toggle a second toggle member on the fixture; The mounting assembly comprises a first mounting seat, a first base and a bearing member, wherein the bearing member is mounted on the first mounting seat through the first base, the first mounting seat is drivingly connected to the output end of the second driving member, and the first driving member is mounted on the bearing member; The linkage mechanism is mounted on the imprinting body, and the clamp is mounted on the output end of the first driving member; The clamp comprises a first fixing part, a second fixing part, an elastic supporting assembly, a transmission member and a second toggle member mounted on the transmission member, wherein the first fixing part is supported on the second fixing part by the elastic supporting assembly, the transmission member is in transmission connection with the elastic supporting assembly, and when the first toggle member toggles the second toggle member, the first fixing part moves closer to the second fixing part; The elastic support assembly comprises an elastic member, a support member and a resistance part mounted on the support member, the second fixing part is provided with a mounting hole, the support member is mounted on the first fixing part, and one end of the support member away from the first fixing part is inserted into the mounting hole, the elastic member is arranged between the first fixing part and the second fixing part, the transmission member is slidably mounted on the second fixing part along a third direction, and the transmission member is provided with a resistance surface that is in resistance with the resistance part, and the resistance surface is arranged obliquely relative to the third direction; The laser marking method comprises the following steps: Fixing the product to be processed on the fixture; The product to be processed is caused to rotate by the first driving member; Moving a position measuring device along the first direction so that a measuring end of the position measuring device contacts the surface of the product to be processed, and acquiring position data of the surface of the product to be processed; When the product to be processed rotates the preset angle for the nth time When the position measuring device measures the surface position data of the product to be processed, the obtained position data is D n , where n is a natural number; According to the obtained position data D n , and obtain the position data difference ΔZ of the surface of the product to be processed n = D n -D n-1 , where n is a natural number; The initial position data difference ΔZ0 is set to 0, and the rotation time t and the preset angle are The corresponding relationship between the rotation time and the position data difference is obtained by performing data processing on the relationship between the rotation time and the position data difference, and the function of the surface position change rate and the rotation time of the product to be processed during the rotation process is obtained: V = f(t); Taking a negative value of the function of the surface position change rate and the rotation time, the obtained function is - V = - f(t) = g(t), and inputting the - V = g(t) function into a controller, and controlling the second driving member through the controller so that the first driving member moves along the first direction according to the - V = g(t) function; The product to be processed is marked by the marking body.

2. A laser marking method, characterized in that: A laser engraving machine is used, and the laser engraving machine includes an engraving body, a fixture and a linkage mechanism; The linkage mechanism comprises: A first driving structure, wherein the first driving structure comprises a first driving member, wherein an output end of the first driving member is used for transmission connection with the product to be processed, and the first driving member is used for driving the product to be processed to rotate; a second driving structure, wherein the first driving structure is mounted on the second driving structure, wherein the second driving structure comprises a second driving member, an output end of the second driving member is drivingly connected to the first driving member, and the first driving member moves along a first direction under the driving of the second driving member; The linkage mechanism further includes a fourth driving member and a second mounting seat, the second mounting seat is drivingly connected to the output end of the fourth driving member, the second driving structure is mounted on the second mounting seat, and the second driving structure moves along a second direction under the drive of the fourth driving member, and the second direction is perpendicular to the first direction; The first driving structure further comprises a mounting assembly, the mounting assembly is drivingly connected to the output end of the second driving member, and the first driving member is mounted on the mounting assembly; The linkage mechanism further includes a third driving member and a first toggle member, wherein the third driving member is mounted on the mounting assembly, the first toggle member is transmission-connected to an output end of the third driving member, and the toggle member is used to toggle a second toggle member on the fixture; The mounting assembly comprises a first mounting seat, a first base and a bearing member, wherein the bearing member is mounted on the first mounting seat through the first base, the first mounting seat is drivingly connected to the output end of the second driving member, and the first driving member is mounted on the bearing member; The linkage mechanism is mounted on the imprinting body, and the clamp is mounted on the output end of the first driving member; The clamp comprises a first fixing part, a second fixing part, an elastic supporting assembly, a transmission member and a second toggle member mounted on the transmission member, wherein the first fixing part is supported on the second fixing part by the elastic supporting assembly, the transmission member is in transmission connection with the elastic supporting assembly, and when the first toggle member toggles the second toggle member, the first fixing part moves closer to the second fixing part; The elastic support assembly comprises an elastic member, a support member and a resistance part mounted on the support member, the second fixing part is provided with a mounting hole, the support member is mounted on the first fixing part, and one end of the support member away from the first fixing part is inserted into the mounting hole, the elastic member is arranged between the first fixing part and the second fixing part, the transmission member is slidably mounted on the second fixing part along a third direction, and the transmission member is provided with a resistance surface that is in resistance with the resistance part, and the resistance surface is arranged obliquely relative to the third direction; The laser marking method comprises the following steps: Dividing the surface of the product to be processed into one or more cylindrical surface areas and one or more plane areas, and determining the axis of the cylindrical surface areas; Fixing the product to be processed on the fixture, and controlling the rotation axis of the first driving member to be coaxial with the axis of the cylindrical surface area; By means of the first driving member, the product to be processed is rotated so that the marking body marks the cylindrical surface area; The plane area is controlled to be arranged perpendicularly to the first direction by the first driving member, and the plane area is engraved by the engraving body.

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