Surface knurling equipment for thin-wall roller and three-axis positioning clamp

Abstract

The invention relates to the technical field of knurling machining, in particular to thin-wall roller surface knurling equipment and a three-axis positioning clamp. A center rod is inserted from one end of the thin-wall roller, the center rod coincides with the axis of the thin-wall roller through an inner supporting plate, the center rod and the thin-wall roller are kept fixed, the center rod coincides with the axis of a transmission shaft and the axis of a movable sleeve, and the movable sleeve is driven to move in the insertion process so as to drive a connecting arm to move; the connecting arm moves in the direction perpendicular to the surface of the thin-wall roller to complete three-axis positioning; when the knurling cutter wheel makes contact with the surface of the thin-wall roller, the movable sleeve cannot move along the transmission shaft, at the moment, the bottom end of the movable pin moves to the locking groove along the inclined face of the second plug, the bottom end of the movable pin moves downwards to be clamped into the locking groove under the elastic force effect of the spring, and therefore relative fixing of the drawing body and the movable sleeve and rotation of the thin-wall roller are achieved. And the knurling cutter wheel is used for knurling the surface of the thin-wall roller.

Description

Technical Field

[0001] The present invention relates to the technical field of knurling processing, and specifically, to a knurling device for the surface of a thin-walled roller and a three-axis positioning fixture. Background Art

[0002] The knurling process is a process of machining specific textures or patterns on the surface of parts, aiming to improve the surface performance and aesthetics of the parts. The knurling process forms certain patterns by rolling tools or rollers on the surface of the parts, thereby improving the hardness and wear resistance of the parts, reducing friction loss, and increasing the aesthetics of the parts.

[0003] For example, CN204295222U involves a knurling device for machining patterns on the surface of workpieces. Its structure is as follows: a roller bearing is sleeved on one end pin shaft A of the "Y"-shaped holding and adjusting frame of the knurling tool, a left-handed rolling wheel is sleeved on the roller bearing, an adjusting pad is arranged at the other end of the pin shaft A, a roller bearing is sleeved on one end pin shaft B of the "Y"-shaped holding and adjusting frame, a right-handed rolling wheel is sleeved on the roller bearing, an adjusting pad is arranged at the other end of the pin shaft B, the other end of the "Y"-shaped holding and adjusting frame is movably connected to the tool body through a locking pin, and an end cover is arranged at the other end of the locking pin; this knurling device can perform knurling on the stepped surface and conical surface of large shaft parts, and by adjusting the cutting angle of the knurling tool and the angle of the rolling wheel, the processing of different module reticulations can be realized.

[0004] Generally, multiple knurling tools are set at the same time, and the multiple knurling tools are arranged on the same plane perpendicular to the axis of the workpiece to perform simultaneous knurling processing on the workpiece to improve the knurling efficiency of the workpiece. However, the problem is that when replacing tubular workpieces with different pipe diameters, such as using thin-walled rollers, the above-mentioned knurling device lacks a structure for positioning the tubular workpiece and ensuring that the axis of the workpiece is perpendicular to the plane where the multiple knurling tools are located. If the axis of the workpiece is not perpendicular to the plane where the multiple knurling tools are located during knurling processing, it will cause the processing surfaces of the multiple knurling tools on the workpiece to be inconsistent, the patterns machined on the workpiece will interfere with each other, and at the same time, it will affect the aesthetics and structural strength of the workpiece.

[0005] In order to ensure that the axes of tubular workpieces with different pipe diameters are perpendicular to the plane where the multiple knurling tools are located during processing to ensure the knurling processing quality of the workpiece, a knurling device for the surface of a thin-walled roller and a three-axis positioning fixture are proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a knurling device for the surface of a thin-walled roller and a three-axis positioning fixture to solve the problems raised in the above background art.

[0007] To achieve the above object, one of the objects of the present invention is to provide a three-axis positioning fixture for a thin-walled roller, including a positioning component, the positioning component including a drawing body and a transmission body that is snap-fitted with the drawing body; The drawing body includes a central rod and an inner support structure provided on the central rod, the inner support structure contacting the inner wall of the thin-walled roller, and the central rod being fixedly connected to the thin-walled roller through the inner support structure and coinciding with the axis of the thin-walled roller; The transmission body includes a bottom plate and a transmission structure provided on the bottom plate, the transmission structure being snap-fitted with the end of the drawing body, the central rod contacting the inner wall of the thin-walled roller from the inside out through the inner support structure, so that the central rod coincides with the axis of the thin-walled roller and remains fixed to the thin-walled roller, and then the end of the central rod is inserted into the transmission structure, so that the transmission structure bites the end of the central rod and makes the axis of the central rod coincide with the axis of the transmission structure.

[0008] As a further improvement of this technical solution, a first plug is provided at one end of the central rod away from the transmission structure, a cross sleeve is sleeved on the central rod, a screw ring is rotatably connected to one end of the cross sleeve away from the first plug, the inner wall of the screw ring is threadedly connected to the central rod, the inner support structure includes a plurality of inner support plates symmetrically distributed with the central rod as the axis, one end of the inner support plate is slidably connected to the cross sleeve, and the other end of the inner support plate is slidably connected to the first plug.

[0009] As a further improvement of this technical solution, a second plug is provided at one end of the central rod away from the first plug, the transmission structure includes a motor and a transmission member provided on the bottom plate, the transmission member includes a transmission shaft and a movable sleeve provided on the transmission shaft, the axis of the movable sleeve coincides with the axis of the transmission shaft, the second plug is inserted and matched with the middle of the movable sleeve, the end of the transmission shaft away from the central rod is drivingly connected to the motor, and a cross groove for accommodating the central rod is provided on the surface of the transmission shaft near the central rod.

[0010] As a further improvement of this technical solution, the shape of the cross groove matches the shape of the cross sleeve.

[0011] As a further improvement of this technical solution, both the first plug and the second plug are conical structures with inclined surfaces on the surface, and a forward clamping plate with elastic connection is provided on the surface of the inner support plate close to the inner wall of the thin-walled roller, and the forward clamping plate is used to clamp one end of the thin-walled roller.

[0012] As a further improvement of the technical solution, an insertion groove penetrating the front and rear surfaces thereof is formed in the middle of the movable sleeve. The second plug is in plug-in fit with the insertion groove. A locking groove is formed on the surface of the second plug. A movable pin is in plug-in fit in the movable sleeve. The top end of the movable pin passes through the outer wall surface of the movable sleeve. The bottom end of the movable pin passes through the insertion groove. The bottom end of the movable pin is in snap fit with the locking groove. The movable pin is connected to the inner wall of the movable sleeve through a spring arranged on the surface.

[0013] As a further improvement of the technical solution, a toothed plate is arranged in the middle of the movable pin. A plurality of cogs are correspondingly arranged on the surface of the transmission shaft. The toothed plate is in snap fit with the cogs.

[0014] A second object of the present invention is to further provide a device for surface knurling in cooperation with the above-mentioned three-axis positioning fixture for thin-walled rollers, including a knurling workpiece, which is characterized in that: the knurling workpiece includes an adjusting body slidably connected to the movable sleeve and a processing body slidably connected to the bottom plate; The adjusting body includes a plurality of connecting arms symmetrically distributed with the transmission shaft as the axis and a collar connected to the movable sleeve. A plurality of slide rods corresponding to the number of connecting arms are arranged on the periphery of the collar. The slide rods are connected to the connecting arms; The processing body includes an inner frame plate slidably connected to the bottom plate and a knurling cutter wheel arranged at the bottom of the inner frame plate. The inner frame plate is fixedly connected to one end of the connecting arm. A plurality of the knurling cutter wheels are located on the same vertical plane perpendicular to the bottom plate. During the process of inserting the second plug into the movable sleeve, the movable sleeve is driven to move by the second plug, and then the connecting arms are driven to move through the collar connected to the movable sleeve, so that the connecting arms move along the direction perpendicular to the surface of the thin-walled roller to complete three-axis positioning.

[0015] As a further improvement of the technical solution, the movable sleeve is rotatably connected to the collar. A plate end ring frame is arranged at one end of the bottom plate away from the motor. A plurality of positioning pins are arranged on the surface of the plate end ring frame close to the motor. Corresponding positioning holes are formed on the connecting arms. The positioning pins pass through the positioning holes.

[0016] As a further improvement of the technical solution, a plurality of outer frame plates are arranged on the inner wall of the plate end ring frame. The inner frame plate is slidably connected to the outer frame plates. A sliding plate connected in a vertical sliding manner is arranged at one end of the inner frame plate away from the connecting arm. A screw rod is rotatably connected in the sliding plate. The two ends of the rotating shaft of the knurling cutter wheel are rotatably connected to end shaft sleeves. One end shaft sleeve is rotatably connected to the bottom end of the inner frame plate. The other end shaft sleeve is hinged to an intermediate plate. The top end of the intermediate plate is hinged to a movable plate. The screw rod is in threaded connection with the movable plate.

[0017] Compared with the prior art, the beneficial effects of the present invention: In the knurling equipment for the surface of thin-walled rollers and the three-axis positioning fixture, the center rod is inserted into one end of the thin-walled roller, and the inner support plate contacts the inner wall of the thin-walled roller from the inside to the outside, so that the center rod coincides with the axis of the thin-walled roller and is fixed to the thin-walled roller. When the second plug is inserted into the movable sleeve, the center rod coincides with the axes of the transmission shaft and the movable sleeve, and during the insertion process, the movable sleeve is driven by the center rod to move, and then drives the collar connected to the movable sleeve to drive the connecting arm to move, so that the connecting arm moves along the direction perpendicular to the surface of the thin-walled roller to complete the three-axis positioning, ensuring that the axes of tubular workpieces with different diameters are perpendicular to the plane where multiple knurling tools are located during processing, so as to ensure the knurling processing quality of the workpieces; When the knurling cutter wheel contacts the surface of the thin-walled roller, the movable sleeve can no longer move along the transmission shaft. At this time, the bottom end of the movable pin moves along the inclined surface of the second plug until the bottom end of the movable pin moves to the locking groove. Under the elastic force of the spring, the bottom end of the movable pin moves downward and is stuck in the locking groove, so as to realize the relative fixation of the pulling body and the movable sleeve. At the same time, the toothed plate just catches the teeth, so that the movable sleeve and the transmission shaft are relatively fixed. The motor drives the transmission shaft to rotate, and then drives the thin-walled roller to rotate, so that the knurling cutter wheel performs knurling processing on the surface of the thin-walled roller. The whole process has few operating steps, which is beneficial to the knurling processing of the thin-walled drum. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the structural schematic diagram of the positioning component of the present invention; Figure 3 is the cross-sectional structure diagram of the pulling body of the present invention; Figure 4 is Figure 3 the enlarged schematic diagram of the structure at A in Figure 5 is the structural schematic diagram of the transmission body of the present invention; Figure 6 is the cross-sectional structure diagram of the transmission part of the present invention; Figure 7 is the cross-sectional structure diagram of the movable sleeve of the present invention; Figure 8 is the structural schematic diagram of the knurling workpiece of the present invention; Figure 9 is the schematic diagram of the structure of the adjusting body of the present invention Figure 1 ; Figure 10 is the schematic diagram of the structure of the adjusting body of the present invention Figure 2 ; Figure 11 is the structural schematic diagram of the processing body of the present invention; Figure 12 is the schematic diagram of the workpiece processing state of the present invention.

[0019] The meanings of the reference numerals in the figure are as follows: 1. Positioning component; 11. Pulling body; 111. Central rod; 1111. Rod thread; 112. First plug; 113. Inner support plate; 1131. Smooth clamping plate; 114. Second plug; 1141. Locking groove; 115. Cross sleeve frame; 1151. Screw ring; 12. Driving body; 121. Bottom plate; 122. Motor; 123. Transmission member; 1231. Transmission shaft; 1232. Movable sleeve; 12321. Insertion groove; 1233. Cross groove; 1234. Movable pin; 12341. Tooth plate; 1235. Clamping tooth; 124. Plate end ring frame; 1241. Positioning pin; 1242. Outer plate of the frame 2. Knurled workpiece; 21. Adjusting body; 211. Connecting arm; 212. Sleeve ring; 213. Slide bar; 214. Positioning port; 22. Machining body; 221. Inner plate of the frame; 2211. Slide plate; 2212. Screw rod; 222. Knurling cutter wheel; 2221. End shaft sleeve; 2222. Intermediate plate; 2223. Movable plate Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 As shown in, one of the purposes of this embodiment is to provide a three-axis positioning fixture for a thin-walled roller, including a positioning component 1, and the positioning component 1 includes a pulling body 11 and a driving body 12 that is clamped and matched with the pulling body 11.

[0022] The pulling body 11 includes a central rod 111 and an inner support structure arranged on the central rod 111. The inner support structure contacts the inner wall of the thin-walled roller. The central rod 111 is fixedly connected to the thin-walled roller through the inner support structure and coincides with the axis of the thin-walled roller; The transmission body 12 includes a bottom plate 121 and a transmission structure arranged on the bottom plate 121. The transmission structure is clamped and matched with the end of the drawing body 11. The central rod 111 is inserted from one end of the thin-walled roller and contacts the inner wall of the thin-walled roller from the inside out through the inner support structure, so that the central rod 111 coincides with the axis of the thin-walled roller and is fixed to the thin-walled roller. Then, the end of the central rod 111 is inserted into the transmission structure, so that the transmission structure bites the end of the central rod 111 and makes the axis of the central rod 111 coincide with the axis of the transmission structure, thereby realizing the positioning of the thin-walled roller.

[0023] The above structure is disclosed as follows: As Figure 3 、 Figure 4 shown, a first plug 112 is arranged at one end of the central rod 111 far from the transmission structure. A cross sleeve 115 is sleeved on the central rod 111. A screw ring 1151 is rotatably connected to one end of the cross sleeve 115 far from the first plug 112. The inner wall of the screw ring 1151 and the central rod 111 are threadedly connected through the rod threads 1111 arranged on the central rod 111. The inner support structure includes a plurality of inner support plates 113 symmetrically distributed with the central rod 111 as the axis. One end of the inner support plate 113 is slidably connected to the cross sleeve 115, and the other end of the inner support plate 113 is slidably connected to a first inclined groove opened on the first plug 112. The first plug 112 is aligned with the nozzle of the thin-walled roller and inserted until the inner support plate 113 is located inside the thin-walled roller. The screw ring 1151 threadedly connected and rotated on the central rod 111 is used to drive the cross sleeve 115 to move along the surface of the central rod 111. When the cross sleeve 115 moves in a direction away from the first plug 112, the cross sleeve 115 will drive the inner support plate 113 to slide along the cross sleeve 115. When sliding, the other end of the inner support plate 113 moves along the first inclined groove to drive the inner support plate 113 away from the central rod 111 and move towards the inner wall of the thin-walled roller, squeezing the inner wall of the thin-walled roller from the inside out, realizing the fixation of the thin-walled roller by means of inner support, and driving the central rod 111 to coincide with the axis of the thin-walled roller, realizing the positioning of the axis of the central rod 111 and the thin-walled roller.

[0024] After the central rod 111 fixes the thin-walled roller and their axes coincide, the connection between the central rod 111 and the transmission structure needs to be carried out, as Figure 5 、 Figure 6As shown, a second plug 114 is provided at one end of the central rod 111 away from the first plug 112. The transmission structure includes a motor 122 and a transmission member 123 provided on the bottom plate 121. The transmission member 123 includes a transmission shaft 1231 and a movable sleeve 1232 provided on the transmission shaft 1231. The axis of the movable sleeve 1232 coincides with the axis of the transmission shaft 1231. The second plug 114 is in plug-in fit with the middle part of the movable sleeve 1232. One end of the transmission shaft 1231 away from the central rod 111 is in transmission connection with the motor 122. A cross groove 1233 for accommodating the central rod 111 is provided on the surface of the transmission shaft 1231 near the central rod 111. The shape of the cross groove 1233 matches the shape of the cross sleeve bracket 115. After the central rod 111 fixes the thin-walled roller, the thin-walled roller is brought close to the transmission structure so that the second plug 114 is aligned with the cross groove 1233 and inserted into the cross groove 1233. The thin-walled roller is continuously pushed so that the second plug 114 is aligned with the middle part of the movable sleeve 1232 and inserted, and the cross sleeve bracket 115 is snapped into the cross groove 1233 to complete the connection with the transmission structure. During the connection process, by inserting the second plug 114 at the end of the central rod 111 into the middle part of the movable sleeve 1232 and combining the cross sleeve bracket 115 being snapped into the cross groove 1233, the axis of the central rod 111 can be made to coincide with the axis of the transmission shaft 1231, that is, the axis of the thin-walled roller coincides with the axis of the transmission shaft 1231. Further, both the first plug 112 and the second plug 114 are conical structures with inclined surfaces on the surface, and a forward clamping plate 1131 with elastic connection is provided on the inner support plate 113 close to the inner wall surface of the thin-walled roller. The forward clamping plate 1131 is used to clamp one end of the thin-walled roller. Setting the first plug 112 as a conical structure is beneficial for inserting the central rod 111 and the inner support plate 113 into the thin-walled roller. Also, setting the second plug 114 as a conical structure can also reduce the difficulty of inserting the second plug 114 into the middle part of the movable sleeve 1232. By providing the forward clamping plate 1131 to clamp the end of the thin-walled roller, the inner support plate 113 can be prevented from sliding along the inner wall of the thin-walled roller when the thin-walled roller is brought close to the transmission structure.

[0025] After the insertion of the end of the drawing body 11 is completed, it is next necessary to maintain the fixed connection between the drawing body 11 and the transmission shaft 1231 to prevent accidental detachment of the thin-walled roller, such as Figure 6 、 Figure 7As shown, a through insertion groove 12321 is formed in the middle of the movable sleeve 1232 through its front and rear surfaces. The second plug 114 is inserted into the insertion groove 12321 in a plug-in fit. A locking groove 1141 is formed on the surface of the second plug 114. A movable pin 1234 is inserted into the movable sleeve 1232 in a plug-in fit. The top end of the movable pin 1234 passes through the outer wall surface of the movable sleeve 1232, and the bottom end of the movable pin 1234 passes through the insertion groove 12321. The bottom end of the movable pin 1234 is in snap-fit with the locking groove 1141. A spring is arranged on the surface of the movable pin 1234, and the movable pin 1234 is connected to the inner wall of the movable sleeve 1232 through the spring arranged on its surface. When the end of the second plug 114 enters the insertion groove 12321, the bottom end of the movable pin 1234 contacts the inclined surface of the second plug 114. During the process of the second plug 114 being inserted into the insertion groove 12321, the bottom end of the movable pin 1234 moves along the inclined surface of the second plug 114 until the bottom end of the movable pin 1234 moves to the position of the locking groove 1141. At this time, under the elastic force of the spring, the bottom end of the movable pin 1234 moves downward and snaps into the locking groove 1141, thereby realizing the relative fixation of the pulling body 11 and the movable sleeve 1232. Further, a toothed plate 12341 is arranged in the middle of the movable pin 1234, and a plurality of locking teeth 1235 are correspondingly arranged on the surface of the transmission shaft 1231. The toothed plate 12341 is in snap-fit with the locking teeth 1235. By means of the snap-fit, when the bottom end of the movable pin 1234 snaps into the locking groove 1141, the toothed plate 12341 just catches the locking teeth 1235, so that the movable sleeve 1232 and the transmission shaft 1231 are kept relatively fixed, and the accidental detachment of the thin-walled roller can be avoided.

[0026] Please refer to Figure 8 、 Figure 9 、 Figure 11 As shown, the second object of this embodiment is to further provide a device for surface knurling in cooperation with the above-mentioned three-axis positioning fixture for thin-walled rollers, including a knurling workpiece 2. The knurling workpiece 2 includes an adjusting body 21 slidably connected to the movable sleeve 1232 and a processing body 22 slidably connected to the bottom plate 121.

[0027] The adjusting body 21 includes a plurality of connecting arms 211 symmetrically distributed with the transmission shaft 1231 as the axis and a collar 212 connected to the movable sleeve 1232. A plurality of slide rods 213 corresponding to the number of the connecting arms 211 are arranged on the periphery of the collar 212. The slide rods 213 are slidably connected to the second inclined grooves formed on the connecting arms 211.

[0028] The workpiece 22 includes an inner frame plate 221 slidably connected to the bottom plate 121 and a knurling cutter wheel 222 disposed at the bottom of the inner frame plate 221. The inner frame plate 221 is fixedly connected to one end of the connecting arm 211. A plurality of knurling cutter wheels 222 are located on the same vertical plane perpendicular to the bottom plate 121. After the central rod 111 completes the fixation of the thin-walled roller, when the second plug 114 is inserted into the movable sleeve 1232, the movable sleeve 1232 is driven to move by the second plug 114, and then the connecting arm 211 is driven to move through the collar 212 connected to the movable sleeve 1232, so that the connecting arm 211 moves along the direction perpendicular to the surface of the thin-walled roller to complete the three-axis positioning. When the knurling cutter wheel 222 contacts the surface of the thin-walled roller, driven by the motor 122, the transmission shaft 1231 will drive the thin-walled roller to rotate synchronously, and the knurling cutter wheel 222 performs knurling processing on the surface of the thin-walled roller.

[0029] Among them, as Figure 7 , Figure 9 , Figure 10 shown, the outer surface of the movable sleeve 1232 is provided with an annular protrusion, and the inner wall of the collar 212 is correspondingly provided with an annular groove. The annular protrusion is located in the annular groove, and the movable sleeve 1232 and the collar 212 are rotationally connected through the annular protrusion and the annular groove. A plate end ring frame 124 is provided at one end of the bottom plate 121 away from the motor 122. A plurality of positioning pins 1241 are provided on the side of the plate end ring frame 124 close to the motor 122. Corresponding positioning openings 214 are provided on the connecting arm 211. The positioning pins 1241 pass through the positioning openings 214. In a rotationally connected manner, when the transmission shaft 1231 can drive the movable sleeve 1232 to rotate synchronously, it will not hinder the movable sleeve 1232 from driving the collar 212 and then driving the connecting arm 211 to move. By providing the positioning pins 1241, the displacement direction of the connecting arm 211 can be limited, and the connecting arm 211 and the collar 212 can be prevented from being driven to rotate when the movable sleeve 1232 rotates.

[0030] As Figure 10 , Figure 11 shown, the structures of the inner frame plate 221 and the knurling cutter wheel 222 are specifically disclosed as follows: On the inner wall of the plate-end ring frame 124, there are multiple outer frame plates 1242. The inner frame plate 221 is slidably connected to the outer frame plates 1242. At one end of the inner frame plate 221 away from the connecting arm 211, there is a sliding plate 2211 that is slidably connected up and down. A screw rod 2212 is rotatably connected inside the sliding plate 2211. The two ends of the rotating shaft of the knurling cutter wheel 222 are rotatably connected to the end shaft sleeves 2221. One end shaft sleeve 2221 is rotatably connected to the bottom end of the inner frame plate 221, and the other end shaft sleeve 2221 is hinged to an intermediate plate 2222. The top end of the intermediate plate 2222 is hinged to a movable plate 2223. One end of the screw rod 2212 passes through the movable plate 2223 and is threadedly connected to the movable plate 2223. By rotating the screw rod 2212 on the sliding plate 2211, the screw rod 2212 will drive the movable plate 2223 that is threadedly connected to the screw rod 2212 to move back and forth. Furthermore, the intermediate plate 2222 is driven by the movable plate 2223, and then the knurling cutter wheel 222 is driven to change its angle, so as to facilitate adjusting the angle of the knurling cutter wheel 222 relative to the surface of the thin-wall roller during knurling.

[0031] In summary, in the present invention, the three-axis positioning of the thin-wall roller is realized through the central rod 111, the transmission shaft 1231, the movable sleeve 1232 and the connecting arm 211. The central rod 111 is inserted into one end of the thin-wall roller, and the inner support plate 113 contacts the inner wall of the thin-wall roller from the inside to the outside, so that the central rod 111 coincides with the axis of the thin-wall roller and is fixed to the thin-wall roller. The end of the central rod 111, that is, the second plug 114, is inserted into the movable sleeve 1232. As shown by the arrow a in Figure 12 During the process of inserting the second plug 114 into the movable sleeve 1232, the axis of the central rod 111 coincides with the axes of the transmission shaft 1231 and the movable sleeve 1232. During the insertion process, the movable sleeve 1232 is driven by the central rod 111 to move, as shown by the arrow b in Figure 12 As shown by the arrow c in Figure 12 so that the connecting arm 211 moves along a direction perpendicular to the surface of the thin-wall roller to complete the three-axis positioning. When the knurling cutter wheel 222 contacts the surface of the thin-wall roller, the connecting arm 211 can no longer move towards the surface of the thin-wall roller, that is, the movable sleeve 1232 can no longer move along the transmission shaft 1231. At this time, the bottom end of the movable pin 1234 moves along the inclined surface of the second plug 114 until the bottom end of the movable pin 1234 moves to the locking groove 1141. Under the elastic force of the spring, the bottom end of the movable pin 1234 moves downward and is stuck in the locking groove 1141, so as to realize the relative fixation between the pulling body 11 and the movable sleeve 1232. At the same time, the toothed plate 12341 just catches the teeth 1235, so that the movable sleeve 1232 and the transmission shaft 1231 are kept relatively fixed. The motor 122 drives the transmission shaft 1231 to rotate, and then drives the thin-wall roller to rotate, so that the knurling cutter wheel 222 performs knurling processing on the surface of the thin-wall roller.

[0032] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and the descriptions in the specification are only preferred examples of the present invention, and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A three-axis positioning fixture for thin-walled rollers, comprising a positioning assembly (1), characterized in that: The positioning assembly (1) comprises a drawing body (11) and a transmission body (12) engaged with the drawing body (11); The drawing body (11) comprises a central rod (111) and an inner support structure arranged on the central rod (111), the inner support structure contacts the inner wall of the thin-walled roller, and the central rod (111) is fixedly connected to the thin-walled roller via the inner support structure and coincides with the axis of the thin-walled roller; The transmission body (12) comprises a bottom plate (121) and a transmission structure arranged on the bottom plate (121), the transmission structure being engaged with the end of the drawing body (11), the center rod (111) contacting the inner wall of the thin-walled roller from the inside to the outside through the inner support structure, so that the center rod (111) coincides with the axis of the thin-walled roller and remains fixed to the thin-walled roller, and then the end of the center rod (111) is inserted into the transmission structure, so that the transmission structure bites the end of the center rod (111), and the axis of the center rod (111) coincides with the axis of the transmission structure.

2. The three-axis positioning fixture for thin-walled rollers according to claim 1 is characterized in that: A first plug (112) is arranged at one end of the center rod (111) away from the transmission structure, a cross sleeve (115) is sleeved on the center rod (111), and a screw ring (1151) is rotatably connected to one end of the cross sleeve (115) away from the first plug (112), the inner wall of the screw ring (1151) is threadedly connected to the center rod (111), and the inner support structure comprises a plurality of inner support plates (113) symmetrically distributed around the center rod (111), one end of the inner support plate (113) is slidably connected to the cross sleeve (115), and the other end of the inner support plate (113) is slidably connected to the first plug (112).

3. The three-axis positioning fixture for thin-walled rollers according to claim 2 is characterized in that: A second plug (114) is provided at one end of the center rod (111) away from the first plug (112); the transmission structure comprises a motor (122) and a transmission member (123) provided on the base plate (121); the transmission member (123) comprises a transmission shaft (1231) and a movable sleeve (1232) provided on the transmission shaft (1231); the axis of the movable sleeve (1232) coincides with the axis of the transmission shaft (1231); the second plug (114) is plugged into and matched with the middle of the movable sleeve (1232); the end of the transmission shaft (1231) away from the center rod (111) is in transmission connection with the motor (122); and a cross groove (1233) for accommodating the center rod (111) is provided on the surface of one end of the transmission shaft (1231) close to the center rod (111).

4. The three-axis positioning fixture for thin-walled rollers according to claim 3 is characterized in that: The shape of the cross groove (1233) matches the shape of the cross sleeve (115).

5. The three-axis positioning fixture for thin-walled rollers according to claim 4 is characterized in that: The first plug (112) and the second plug (114) are both conical structures with inclined surfaces, and the inner support plate (113) is provided with an elastically connected clamping plate (1131) close to the inner wall of the thin-walled roller, and the clamping plate (1131) is used to clamp one end of the thin-walled roller.

6. The three-axis positioning fixture for thin-walled rollers according to claim 5, characterized in that: An insertion groove (12321) is provided in the middle of the movable sleeve (1232) and runs through the front and rear surfaces thereof; the second plug (114) is plugged into the insertion groove (12321); a locking groove (1141) is provided on the surface of the second plug (114); a movable pin (1234) is plugged into the movable sleeve (1232); the top end of the movable pin (1234) passes through the outer wall surface of the movable sleeve (1232); the bottom end of the movable pin (1234) passes through the insertion groove (12321); the bottom end of the movable pin (1234) is snap-fitted into the locking groove (1141); and the movable pin (1234) is connected to the inner wall of the movable sleeve (1232) via a spring arranged on the surface.

7. The three-axis positioning fixture for thin-walled rollers according to claim 6, characterized in that: A tooth plate (12341) is provided in the middle of the movable pin (1234), and a plurality of latching teeth (1235) are correspondingly provided on the surface of the transmission shaft (1231), and the tooth plate (12341) is engaged with the latching teeth (1235).

8. A device for performing surface knurling in cooperation with the three-axis positioning fixture for thin-walled rollers as claimed in any one of claims 1 to 7, comprising a knurling workpiece (2), characterized in that: The knurled workpiece (2) comprises an adjusting body (21) slidably connected to the movable sleeve (1232) and a processing body (22) slidably connected to the bottom plate (121); The regulating body (21) comprises a plurality of connecting arms (211) symmetrically distributed about the transmission shaft (1231) and a collar (212) connected to the movable sleeve (1232); the collar (212) is provided with sliding rods (213) whose number corresponds to the number of connecting arms (211) on the periphery; the sliding rods (213) are connected to the connecting arms (211); The processing body (22) comprises an inner frame plate (221) slidably connected to the bottom plate (121) and a knurled cutter wheel (222) arranged at the bottom of the inner frame plate (221); the inner frame plate (221) is fixedly connected to one end of the connecting arm (211); a plurality of the knurled cutter wheels (222) are located on the same vertical plane perpendicular to the bottom plate (121); when the second plug (114) is inserted into the movable sleeve (1232), the movable sleeve (1232) is driven to move by the second plug (114), and then the connecting arm (211) is driven to move through the sleeve ring (212) connected to the movable sleeve (1232), so that the connecting arm (211) moves in a direction perpendicular to the surface of the thin-walled roller to complete three-axis positioning.

9. The device for performing surface knurling in cooperation with a three-axis positioning fixture for thin-walled rollers according to claim 8, characterized in that: The movable sleeve (1232) is rotatably connected to the sleeve ring (212); a plate end ring frame (124) is provided at one end of the bottom plate (121) away from the motor (122); a plurality of positioning pins (1241) are provided at one side of the plate end ring frame (124) close to the motor (122); a corresponding positioning opening (214) is provided on the connecting arm (211); and the positioning pin (1241) passes through the positioning opening (214).

10. The device for performing surface knurling in cooperation with a three-axis positioning fixture for thin-walled rollers according to claim 9, characterized in that: The inner wall of the plate end ring frame (124) is provided with a plurality of frame outer plates (1242), the frame inner plate (221) is slidably connected to the frame outer plate (1242), the frame inner plate (221) is provided with a slide plate (2211) slidably connected up and down at one end of the frame inner plate (221) away from the connecting arm (211), a screw rod (2212) is rotatably connected inside the slide plate (2211), both ends of the rotating shaft of the knurled cutter wheel (222) are rotatably connected to the end shaft sleeve (2221), one end shaft sleeve (2221) is rotatably connected to the bottom end of the frame inner plate (221), the other end shaft sleeve (2221) is hingedly connected to an intermediate plate (2222), the top end of the intermediate plate (2222) is hingedly connected to a movable plate (2223), and the screw rod (2212) is threadedly connected to the movable plate (2223).

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