A new energy motor hollow shaft turning equipment and process

Abstract

The present invention belongs to the technical field of motor shaft processing, and specifically is a new energy motor hollow shaft turning equipment and process thereof, comprising a workbench, wherein a first bracket and a second bracket are installed on the workbench, wherein a mounting rod and a positioning column are installed on the first bracket, an electric telescopic rod is installed in the mounting rod, an extrusion rod is installed in the positioning column, and the extrusion rod and the electric telescopic rod are connected to each other; a baffle is installed on one end of the mounting rod close to the positioning column; a clamping block is slidably installed on the positioning column; the clamping block is connected to the extrusion rod through a connecting rod; the present invention has a simple structure, and can radially and axially position and fix the hollow shaft workpiece through the clamping block and the baffle, thereby improving the positioning and fixing effect of the hollow shaft workpiece and ensuring the subsequent processing accuracy and quality. At the same time, the hollow shaft workpiece is subjected to the combined effect of the internal expansion force of the clamping block and the extrusion force of the pressing block, thereby ensuring that when the fixing effect is good, damage to the hollow shaft workpiece caused by excessive clamping force is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of motor shaft processing, and specifically relates to a new energy motor hollow shaft turning device and a process thereof. Background Art

[0002] New energy electric vehicles are the current and future development direction of the automotive industry. In order to reduce the weight of the vehicle, a hollow motor shaft is designed. Generally, the material of the hollow shaft is carburized steel or medium carbon steel, such as 20MnCr5, 42CrMo4, and 45 steel. The typical characteristics of this type of hollow motor shaft structure are that it is thick in the middle and small at both ends. Generally, the wall thickness of the middle part is 4 to 8 mm.

[0003] The existing part clamping device of the vertical machining center mainly relies on the extrusion between two clamping blocks to clamp and fix the parts. Generally, it can only act on block or plate parts. When clamping shaft parts, the surface of the clamping block of the clamping device is too flat and smooth, and the shape of the shaft parts is affected. As a result, the shaft parts are easily affected by the vibration of the machine and become misaligned during the fixing process, affecting the machining accuracy of the parts, which is very inconvenient. At the same time, since the interior of the hollow shaft is hollow, the wall thickness of the hollow shaft parts is relatively thin. When the hollow shaft is externally clamped and fixed by extrusion, it is easy to cause damage to the hollow shaft due to excessive clamping pressure. Summary of the invention

[0004] In order to make up for the shortcomings of the prior art, the hollow shaft workpiece is positioned and fixed by an internal expansion method through a clamping block, so that the hollow shaft workpiece completes radial positioning, and then drives the end face of the hollow shaft workpiece to abut the baffle to complete the axial positioning of the hollow shaft workpiece, thereby improving the positioning and fixing effect of the hollow shaft workpiece and ensuring the subsequent processing accuracy and quality. At the same time, the hollow shaft workpiece is acted upon by the internal expansion force of the clamping block and the extrusion force of the pressure block to ensure that the fixing effect is good and avoid damage to the hollow shaft workpiece due to excessive clamping force. The present invention proposes a new energy motor hollow shaft turning equipment and a process thereof.

[0005] The technical solution adopted by the present invention to solve the technical problem is: the hollow shaft turning equipment of a new energy motor described in the present invention comprises a machining center, a fixed tool is installed on the workbench of the machining center, and the fixed tool is used to position and fix the hollow shaft workpiece;

[0006] The fixing fixture comprises a first bracket and a second bracket, the first bracket and the second bracket are both equipped with a mounting rod, an electric telescopic rod is installed inside the mounting rod, a positioning column is installed on the mounting rod, an extrusion rod is installed in the middle of the positioning column, and the extrusion rod is connected to the electric telescopic rod;

[0007] An elastic block is installed between the installation rod and the positioning column, a sliding cavity is opened in the installation rod, a movable rod is slidably installed in the sliding cavity, the other end of the movable rod is installed on the positioning column, the movable rod passes through the middle of the elastic block, and a baffle is installed on the end of the installation rod close to the positioning column;

[0008] The positioning column is evenly provided with a plurality of groups of inclined grooves around the axis, the bottom surface of the inclined groove is provided with a guide groove, the guide groove is provided with a slide groove, a clamping block is installed in the inclined groove, a slider is installed under the clamping block, and the slider and the slide groove cooperate with each other;

[0009] A connecting groove is provided on the side of the slider, a connecting rod is installed in the guide groove, one end of the connecting rod slides in the connecting groove, and the other end of the connecting rod is fixedly connected to the extrusion rod;

[0010] The positioning column is inserted into the hollow shaft workpiece, the clamping block contacts and presses the inner wall of the hollow shaft workpiece, and the hollow shaft workpiece is blocked by the baffle.

[0011] Preferably, a plurality of groups of pressing blocks are installed on the baffle, the pressing blocks are evenly distributed around the axis of the mounting rod, the pressing blocks are in contact with the outer surface of the hollow shaft workpiece, and the pressing blocks are guided toward an inclined surface or an arc surface at one end of the hollow shaft workpiece;

[0012] An elastic layer is mounted on the baffle, and the thickness of the elastic block is greater than that of the elastic layer.

[0013] Preferably, a rectangular groove is provided on the baffle, the pressure block is slidably installed in the rectangular groove, an elastic telescopic rod is installed between the side of the pressure block away from the hollow shaft workpiece and the rectangular groove, and a pad is installed between the side of the pressure block close to the hollow shaft workpiece and the rectangular groove, and the thickness of the pad is less than or equal to the distance between the side of the rectangular groove close to the positioning column and the outer surface of the hollow shaft workpiece.

[0014] Preferably, a hydraulic bag is installed in the elastic telescopic rod, and the hydraulic bags in each of the elastic telescopic rods are interconnected.

[0015] Preferably, a mounting hole is provided on the surface of the clamping block, a plug post is inserted into the mounting hole, and an additional block is installed on the plug post;

[0016] The plug post is magnetic, and there is interference fit between the plug post and the mounting hole. The increase block has a variety of thickness sizes.

[0017] Preferably, there are a plurality of groups of positioning posts, the extrusion rods are connected to each other via connecting rods, adjacent positioning posts are connected via fixing rods, and the connecting rod between two adjacent positioning posts has the same length as the fixing rod.

[0018] Preferably, there is an angle difference between projections of adjacent positioning posts on the baffle.

[0019] A new energy motor hollow shaft turning process, the process is applicable to any of the above-mentioned new energy motor hollow shaft turning equipment:

[0020] S1: fix the first bracket and the second bracket in the fixed tooling to the workbench respectively, and at the same time, fix the mounting rod on the first bracket by the rotating chuck on the machining center, so that the second bracket is installed on the slide rail on the workbench;

[0021] S2: Sleeve the two ends of the hollow shaft workpiece onto the positioning columns on the first bracket and the second bracket, and then move the second bracket so that the hollow shaft workpiece is supported by the first bracket and the second bracket;

[0022] S3: sequentially controlling the movement of the electric telescopic rods in the first bracket and the second bracket, so that the end of the hollow shaft workpiece close to the first bracket is first fixed, and then the end of the hollow shaft workpiece close to the second bracket is fixed, and then the second bracket is locked on the slide rail;

[0023] S4: Start the machining center and perform turning on the hollow shaft workpiece according to a predetermined program. After the machining is completed, the hollow shaft workpiece is removed.

[0024] The beneficial effects of the present invention are as follows:

[0025] 1. The present invention discloses a new energy motor hollow shaft turning equipment and process thereof. By setting a mounting rod, a positioning column, an electric telescopic rod, a clamping block and a baffle, the hollow shaft workpiece is first contacted and squeezed by the clamping block to perform internal expansion fixation and radial positioning. After that, the hollow shaft workpiece is driven to move so that its end face abuts the baffle. The baffle is used as a reference to complete the axial positioning, thereby improving the positioning and fixing effect of the hollow shaft workpiece, as well as the subsequent processing accuracy and quality.

[0026] 2. The new energy motor hollow shaft turning equipment and process described in the present invention, by setting a clamping block, a pressure block, a rectangular groove and an elastic telescopic rod, makes the hollow shaft workpiece simultaneously receive the internal expansion force of the clamping block and the clamping force of the pressure block, thereby ensuring that the hollow shaft workpiece is subjected to uniform force and avoiding damage to the hollow shaft workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] Figure 1 It is a schematic structural diagram of the turning equipment of the present invention;

[0029] Figure 2 It is a schematic diagram of the structure of the fixed tooling in the turning equipment of the present invention;

[0030] Figure 3It is a schematic diagram of the structure of the mounting rod and the positioning rod in the turning equipment of the present invention;

[0031] Figure 4 It is a structural schematic diagram of a clamping block in a turning device of the present invention;

[0032] Figure 5 yes Figure 2 A partial enlarged view of the middle part;

[0033] Figure 6 yes Figure 2 A partial enlarged view of point B in the middle;

[0034] Figure 7 yes Figure 3 A partial enlarged view of point C in the middle;

[0035] Figure 8 yes Figure 3 A partial enlarged view of point D in the middle;

[0036] Fig. 9 yes Figure 3 A partial enlarged view of point E in the middle;

[0037] Fig.10 It is a flowchart of the steps of the process of the present invention;

[0038] In the figure: workbench 1, first bracket 11, second bracket 12, hollow shaft workpiece 13, mounting rod 2, electric telescopic rod 21, sliding cavity 22, movable rod 23, elastic block 24, positioning column 3, inclined groove 31, guide groove 32, slide groove 33, extrusion rod 34, connecting rod 35, baffle 4, rectangular groove 41, pressure block 42, elastic telescopic rod 43, cushion block 44, elastic layer 45, card block 5, slider 51, connecting groove 52, additional block 53, plug column 531, mounting hole 532, connecting rod 6, fixing rod 61. DETAILED DESCRIPTION

[0039] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0040] like Figures 1 to 10 As shown, the hollow shaft turning equipment of a new energy motor described in the present invention comprises a machining center, and a fixed tool is installed on the workbench 1 of the machining center, and the fixed tool is used to position and fix the hollow shaft workpiece 13;

[0041] The fixing fixture comprises a first bracket 11 and a second bracket 12, wherein a mounting rod 2 is mounted on each of the first bracket 11 and the second bracket 12, wherein an electric telescopic rod 21 is mounted inside the mounting rod 2, wherein a positioning column 3 is mounted on the mounting rod 2, wherein an extrusion rod 34 is mounted at the middle position of the positioning column 3, and the extrusion rod 34 is connected to the electric telescopic rod 21;

[0042] An elastic block 24 is installed between the installation rod 2 and the positioning column 3. A sliding cavity 22 is provided in the installation rod 2. A movable rod 23 is slidably installed in the sliding cavity 22. The other end of the movable rod 23 is installed on the positioning column 3. The movable rod 23 passes through the middle of the elastic block 24. A baffle 4 is installed on the end of the installation rod 2 close to the positioning column 3.

[0043] The positioning column 3 is evenly provided with a plurality of inclined grooves 31 around the axis, the bottom surface of the inclined groove 31 is provided with a guide groove 32, the guide groove 32 is provided with a slide groove 33, a clamping block 5 is installed in the inclined groove 31, a slider 51 is installed below the clamping block 5, and the slider 51 cooperates with the slide groove 33;

[0044] A connecting groove 52 is provided on the side of the slider 51, and a connecting rod 35 is installed in the guide groove 32. One end of the connecting rod 35 slides in the connecting groove 52, and the other end of the connecting rod 35 is fixedly connected to the extrusion rod 34.

[0045] The positioning column 3 is inserted into the hollow shaft workpiece 13, the clamping block 5 contacts and presses the inner wall of the hollow shaft workpiece 13, and the hollow shaft workpiece 13 is blocked by the baffle 4;

[0046] During operation, the first bracket 11 and the second bracket 12 are first fixed to the workbench 1 respectively, so that the mounting rod 2 on the first bracket 11 is connected to the chuck of the machining center, which is convenient for subsequently driving the hollow shaft workpiece 13 to rotate. At the same time, the second bracket 12 is installed on the slide rail of the workbench 1, which is convenient for installing, tightening and fixing the hollow shaft workpiece 13;

[0047] At the same time, after the hollow shaft workpiece 13 is sleeved onto the positioning column 3, the electric telescopic rod 21 is controlled to move, so that the electric telescopic rod 21 drives the extrusion rod 34 to move in the direction away from the positioning column 3, so that the connecting rod 35 is synchronously driven by the extrusion rod 34 to move in the direction away from the positioning column 3, so that the block 5 in the inclined groove 31 is also synchronously moved in the direction away from the positioning column 3. In this process, affected by the shape of the inclined groove 31, the upper end of the block 5 gradually protrudes from the surface of the positioning column 3, so that the upper end of the block 5 contacts and squeezes the inner wall of the hollow shaft workpiece 13. At this time, the inner wall of the hollow shaft workpiece 13 is squeezed by multiple groups of blocks 5 evenly distributed around the axis, so that the radial positioning of the hollow shaft workpiece 13 is completed, so that the axis of the hollow shaft workpiece 13 coincides with the axis of the positioning column 3 and the mounting rod 2.

[0048] At the same time, the electric telescopic rod 21 can determine that the clamping block 5 contacts and squeezes the inner wall of the hollow shaft workpiece 13 by analyzing the reaction force, current change and other parameters. After that, the electric telescopic rod 21 continues to move, which will drive the positioning column 3 and the hollow shaft workpiece 13 fixed by the positioning column 3 to move synchronously toward the mounting rod 2, so that the end face of the hollow shaft workpiece 13 and the baffle 4 on the mounting rod 2 contact and abut each other, thereby completing the axial positioning of the hollow shaft workpiece 13, so as to ensure that the positioning and fixing effect of the hollow shaft workpiece 13 is good during processing, reduce the error caused by clamping during the turning of the hollow shaft workpiece 13, and improve the turning effect of the hollow shaft workpiece 13;

[0049] At the same time, by dual positioning the hollow shaft workpiece 13 in radial and axial directions, the positioning effect of the hollow shaft workpiece 13 is improved, and the radial direction is positioned first, and then the hollow shaft workpiece 13 is driven to be close to the baffle 4 for axial positioning, which can eliminate the error caused by the staff in placing the hollow shaft workpiece 13 on the fixed tooling. At the same time, when the hollow shaft workpiece 13 and the positioning column 3 are driven to move toward the mounting rod 2, the internal expansion force generated by the clamping block 5 on the hollow shaft workpiece 13 tends to increase, further ensuring the effect of fixing the hollow shaft workpiece 13. At the same time, since the clamping block 5 is used to fix the hollow shaft workpiece 13 with internal expansion, the force on the hollow shaft workpiece 13 can be uniform, avoiding deformation or unstable clamping.

[0050] At the same time, after the staff sleeves the two ends of the hollow shaft workpiece 13 onto the two positioning columns 3 on the first bracket 11 and the second bracket 12, the staff successively controls the movement of the electric telescopic rod 21 in the first bracket 11 and the second bracket 12, so that the hollow shaft workpiece 13 uses the baffle 4 on the mounting rod 2 on the first bracket 11 as the positioning reference, and avoids the electric telescopic rod 21 on the first bracket 11 and the second bracket 12 from moving synchronously, resulting in axial tension on the hollow shaft workpiece 13, affecting the positioning and fixing effect of the hollow shaft workpiece 13. At the same time, after the first bracket 11 has positioned and fixed the hollow shaft workpiece 13, the second bracket 12 positions and fixes the other end of the hollow shaft workpiece 13, and locks the movement of the second bracket 12 on the slide rail after positioning and fixing, further ensuring the concentricity of the two ends of the hollow shaft workpiece 13, ensuring the clamping stability of the hollow shaft workpiece 13, and improving the subsequent processing accuracy and quality;

[0051] At the same time, when the electric telescopic rod 21 drives the positioning column 3 and the hollow shaft workpiece 13 to move synchronously toward the mounting rod 2, the positioning column 3 will squeeze the elastic block 24, causing the elastic block 24 to be compressed and deformed. At the same time, the movable rod 23 on the positioning column 3 will slide in the sliding cavity 22, further guiding and positioning the movement of the positioning column 3, avoiding position deviation of the positioning column 3 and the hollow shaft workpiece 13, and affecting the positioning and fixing effect of the hollow shaft workpiece 13;

[0052] At the same time, before the clamping block 5 contacts the inner wall of the hollow shaft workpiece 13, the resistance of the electric telescopic rod 21 to drive the extrusion rod 34, the connecting rod 35 and the clamping block 5 to move is less than the resistance of the electric telescopic rod 21 to drive the positioning column 3 to move as a whole, thereby ensuring that the clamping block 5 can squeeze and fix the hollow shaft workpiece 13 and then drive the hollow shaft workpiece 13 and the positioning column 3 to move toward the mounting rod 2 together.

[0053] As an embodiment of the present invention, a plurality of groups of pressing blocks 42 are installed on the baffle plate 4, and the pressing blocks 42 are evenly distributed around the axis of the mounting rod 2, and the pressing blocks 42 are in contact with the outer surface of the hollow shaft workpiece 13, and the pressing blocks 42 are inclined or curved toward one end of the hollow shaft workpiece 13;

[0054] An elastic layer 45 is installed on the baffle 4, and the thickness of the elastic block 24 is greater than the thickness of the elastic layer 45;

[0055] In the process that the positioning column 3 and the hollow shaft workpiece 13 move synchronously toward the baffle 4, the hollow shaft workpiece 13 will first contact and squeeze the elastic layer 45 on the baffle 4, so that the outer surface of the hollow shaft workpiece 13 and the pressure block 42 on the baffle 4 are in contact with each other. When the electric telescopic rod 21 stops moving and the end face of the hollow shaft workpiece 13 fully contacts the baffle 4, the end of the hollow shaft workpiece 13 close to the baffle 4 will be inserted into the annular structure surrounded by the pressure block 42, so that the outer surface of the hollow shaft workpiece 13 is limited and fixed by the pressure block 42 evenly distributed around the axis, further improving the positioning and fixing effect of the hollow shaft workpiece 13, improving the concentricity of the hollow shaft workpiece 13 after being fixed, and improving the progress and quality of subsequent processing;

[0056] At the same time, since the annular structure surrounded by the pressing block 42 is located outside the hollow shaft workpiece 13, the outer surface of the hollow shaft workpiece 13 is restricted and squeezed by the pressing block 42, thereby preventing the hollow shaft workpiece 13 from being subjected to excessive internal expansion force of the clamping block 5, which causes the hollow shaft workpiece 13 to be deformed or damaged, affecting the positioning and fixing accuracy of the hollow shaft workpiece 13, and affecting the subsequent processing effect of the hollow shaft workpiece 13;

[0057] At the same time, by setting a slope or an arc surface at one end of the pressing block 42, when the hollow shaft workpiece 13 just comes into contact with the pressing block 42, there will be no direct collision between the two, and there will be guidance between the two, thereby facilitating the insertion of the end of the hollow shaft workpiece 13 into the annular structure surrounded by the pressing block 42, thereby avoiding damage to the end face of the hollow shaft workpiece 13.

[0058] As an embodiment of the present invention, a rectangular groove 41 is formed on the baffle plate 4, and the pressing block 42 is slidably installed in the rectangular groove 41. An elastic telescopic rod 43 is installed between the side of the pressing block 42 away from the hollow shaft workpiece 13 and the rectangular groove 41, and a cushion block 44 is installed between the side of the pressing block 42 close to the hollow shaft workpiece 13 and the rectangular groove 41. The thickness of the cushion block 44 is less than or equal to the distance between the side of the rectangular groove 41 close to the positioning column 3 and the outer surface of the hollow shaft workpiece 13;

[0059] Since the thickness of the cushion block 44 is relatively small, the pressing block 42 will be close to the center line direction of the baffle 4 under the action of the elastic telescopic rod 43, that is, the inner diameter of the annular structure surrounded by the pressing block 42 is smaller than the outer diameter of the hollow shaft workpiece 13. Therefore, in the process of the hollow shaft workpiece 13 moving toward the baffle 4, the edge of the end face of the hollow shaft workpiece 13 will contact and squeeze the pressing block 42, so that the pressing block 42 moves away from the axis of the baffle 4 until the inner diameter of the annular structure surrounded by the pressing block 42 is equal to the outer diameter of the hollow shaft workpiece 13. At this time, the pressing block 42 will just press the outer surface of the hollow shaft workpiece 13, so that the distance of the pressing block 42 can be adaptively adjusted through the action of the elastic telescopic rod 43, so as to avoid the complicated adjustment of the pressing block 42 when processing hollow shaft workpieces 13 with different outer diameters, and when there is an error in the size of the outer surface of the hollow shaft workpiece 13, the pressing block 42 cannot fully press the outer surface of the hollow shaft workpiece 13.

[0060] As an embodiment of the present invention, a hydraulic bag is installed in the elastic telescopic rod 43, and the hydraulic bags in each of the elastic telescopic rods 43 are interconnected;

[0061] By interconnecting the hydraulic bags in the elastic telescopic rods 43, when the hollow shaft workpiece 13 is inserted into the annular structure surrounded by the pressing blocks 42 and a force is applied to the pressing blocks 42, the forces applied by the pressing blocks 42 on the outer surface of the hollow shaft workpiece 13 are the same, thereby ensuring that the outer surface of the hollow shaft workpiece 13 is subjected to uniform force, avoiding uneven force that affects the positioning and fixation of the hollow shaft workpiece 13, and avoiding uneven force that causes excessive local force on the hollow shaft workpiece 13, causing deformation of the hollow shaft workpiece 13, and affecting the subsequent processing effect of the hollow shaft workpiece 13.

[0062] As an embodiment of the present invention, a mounting hole 532 is opened on the surface of the clamping block 5, a plug post 531 is inserted into the mounting hole 532, and an additional block 53 is installed on the plug post 531;

[0063] The plug post 531 is magnetic, and there is an interference fit between the plug post 531 and the mounting hole 532. The increase block 53 has a variety of thickness sizes;

[0064] When the inner diameter of the hollow shaft workpiece 13 is relatively large, the protruding distance of the block 5 in the inclined groove 31 cannot complete the contact and extrusion of the inner wall of the hollow shaft workpiece 13, thereby affecting the positioning and fixation of the hollow shaft workpiece 13 and affecting the adaptability to hollow shaft workpieces 13 of different sizes. Therefore, an additional block 53 is installed on the surface of the block 5 through the mounting hole 532 and the plug column 531 to increase the height of the block 5, so that after the block 5 slides in the inclined groove 31, the block 5 can contact and squeeze the inner wall of the hollow shaft workpiece 13 to complete the positioning and fixation of the hollow shaft workpiece 13;

[0065] At the same time, through the interference fit between the plug block and the mounting hole 532, and the magnetic nature of the plug post 531, after the plug post 531 is inserted into the mounting hole 532, the plug post 531 can only be actively removed by the staff, reducing the possibility of accidental falling off, thereby ensuring the stability of the combination between the increase block 53 and the clamping block 5, and ensuring good positioning and fixing effects on the hollow shaft workpiece 13.

[0066] As an embodiment of the present invention, there are a plurality of groups of positioning posts 3, the extrusion rods 34 are connected to each other through a connecting rod 6, and adjacent positioning posts 3 are connected through a fixing rod 61, and the length of the connecting rod 6 between two adjacent positioning posts 3 is the same as that of the fixing rod 61;

[0067] When the length of the hollow shaft workpiece 13 is relatively long, the two ends of the hollow shaft workpiece 13 are fixed by the positioning columns 3, which easily causes the middle part of the hollow shaft workpiece 13 to deform during the processing, affecting the positioning and fixing effect of the hollow shaft workpiece 13 and the subsequent processing accuracy and quality. Therefore, multiple groups of positioning columns 3 are set in the fixing tool. When the length of the hollow shaft workpiece 13 is relatively long, the staff adds one or more positioning columns 3 on the basis of the existing positioning columns 3 through the connecting rod 6 and the fixing rod 61, thereby increasing the number of fixed positions of the long-length hollow shaft workpiece 13 during positioning and fixing, and making the fixing position of the long-length hollow shaft workpiece 13 of the tooling close to its middle part, thereby further improving the positioning and fixing effect of the relatively long hollow shaft workpiece 13, and avoiding the deformation or poor fixing effect of the hollow shaft workpiece 13 during the processing, affecting the processing accuracy and quality.

[0068] As an implementation mode of the present invention, there is an angle difference between the projections of adjacent positioning posts 3 on the baffle 4;

[0069] By staggering adjacent positioning columns 3 to form an angle difference, a force is applied in all directions around the hollow shaft workpiece 13, so that the internal expansion force on the relatively long hollow shaft workpiece 13 is more evenly distributed, thereby improving the positioning and fixing effect of the hollow shaft workpiece 13 and avoiding damage to the hollow shaft workpiece 13 and affecting the quality of the hollow shaft workpiece 13.

[0070] A new energy motor hollow shaft turning process, the process is applicable to any of the above-mentioned new energy motor hollow shaft turning equipment:

[0071] S1: fix the first bracket 11 and the second bracket 12 in the fixed tooling to the workbench 1 respectively, and at the same time, fix the mounting rod 2 on the first bracket 11 by the rotating chuck on the machining center, so that the second bracket 12 is installed on the slide rail on the workbench 1;

[0072] S2: Sleeve the two ends of the hollow shaft workpiece 13 onto the positioning columns 3 on the first bracket 11 and the second bracket 12, and then move the second bracket 12 so that the hollow shaft workpiece 13 is supported by the first bracket 11 and the second bracket 12;

[0073] S3: sequentially controlling the movement of the electric telescopic rods 21 in the first bracket 11 and the second bracket 12, so that the end of the hollow shaft workpiece 13 close to the first bracket 11 is first fixed, and then the end of the hollow shaft workpiece 13 close to the second bracket 12 is fixed, and then the second bracket 12 is locked on the slide rail;

[0074] S4: Start the machining center and perform turning processing on the hollow shaft workpiece 13 according to a predetermined program. After the processing is completed, remove the hollow shaft workpiece 13.

[0075] The specific workflow is as follows:

[0076] When working, first fix the first bracket 11 and the second bracket 12 to the workbench 1 respectively, so that the mounting rod 2 on the first bracket 11 is connected to the chuck of the machining center, and at the same time, the second bracket 12 is installed on the slide rail of the workbench 1;

[0077] At the same time, after the hollow shaft workpiece 13 is sleeved onto the positioning column 3, the electric telescopic rod 21 is controlled to move, so that the electric telescopic rod 21 drives the extrusion rod 34 to move in the direction away from the positioning column 3, so that the connecting rod 35 is synchronously driven by the extrusion rod 34 to move in the direction away from the positioning column 3, and the block 5 in the inclined groove 31 is also synchronously moved in the direction away from the positioning column 3. In this process, affected by the shape of the inclined groove 31, the upper end of the block 5 gradually protrudes from the surface of the positioning column 3, so that the upper end of the block 5 contacts and squeezes the inner wall of the hollow shaft workpiece 13, and the positioning of the hollow shaft workpiece 13 in the radial direction is completed;

[0078] At the same time, the electric telescopic rod 21 continues to move, which will drive the positioning column 3 and the hollow shaft workpiece 13 fixed by the positioning column 3 to move synchronously toward the mounting rod 2, so that the end surface of the hollow shaft workpiece 13 and the baffle 4 on the mounting rod 2 contact and abut each other, completing the axial positioning of the hollow shaft workpiece 13;

[0079] At the same time, after the staff sleeves the two ends of the hollow shaft workpiece 13 onto the two positioning columns 3 on the first bracket 11 and the second bracket 12, the staff successively controls the electric telescopic rods 21 in the first bracket 11 and the second bracket 12 to move, so that the hollow shaft workpiece 13 takes the baffle 4 on the mounting rod 2 on the first bracket 11 as the positioning reference. At the same time, after the first bracket 11 has positioned and fixed the hollow shaft workpiece 13, the second bracket 12 positions and fixes the other end of the hollow shaft workpiece 13, and locks the movement of the second bracket 12 on the slide rail after positioning and fixing.

[0080] At the same time, when the electric telescopic rod 21 drives the positioning column 3 and the hollow shaft workpiece 13 to move synchronously toward the mounting rod 2, the positioning column 3 will squeeze the elastic block 24, so that the elastic block 24 is compressed and deformed, and at the same time, the movable rod 23 on the positioning column 3 will slide in the sliding cavity 22;

[0081] When the positioning column 3 and the hollow shaft workpiece 13 move synchronously toward the baffle 4, the hollow shaft workpiece 13 will first contact and squeeze the elastic layer 45 on the baffle 4, so that the outer surface of the hollow shaft workpiece 13 and the pressing block 42 on the baffle 4 are in contact with each other. When the electric telescopic rod 21 stops moving and the end face of the hollow shaft workpiece 13 fully contacts the baffle 4, the end of the hollow shaft workpiece 13 close to the baffle 4 will be inserted into the annular structure surrounded by the pressing block 42.

[0082] At the same time, since the annular structure surrounded by the pressing block 42 is located outside the hollow shaft workpiece 13, the outer surface of the hollow shaft workpiece 13 is restricted and squeezed by the pressing block 42;

[0083] At the same time, by providing an inclined surface or an arc-shaped surface at one end of the pressing block 42, when the hollow shaft workpiece 13 just contacts the pressing block 42, there will be no direct collision between the two, and there will be a guide between the two, so that the end of the hollow shaft workpiece 13 is conveniently inserted into the annular structure surrounded by the pressing block 42;

[0084] When the hollow shaft workpiece 13 moves toward the baffle 4, the edge of the end surface of the hollow shaft workpiece 13 contacts and presses the pressing block 42, so that the pressing block 42 moves away from the axis of the baffle 4 until the inner diameter of the annular structure formed by the pressing block 42 is equal to the outer diameter of the hollow shaft workpiece 13. At this time, the pressing block 42 just presses the outer surface of the hollow shaft workpiece 13.

[0085] By interconnecting the hydraulic bags in the elastic telescopic rods 43, when the hollow shaft workpiece 13 is inserted into the annular structure surrounded by the pressing blocks 42, when a force is applied to the pressing blocks 42, the forces applied by the pressing blocks 42 on the outer surface of the hollow shaft workpiece 13 are the same, thereby ensuring that the outer surface of the hollow shaft workpiece 13 is subjected to uniform force;

[0086] An additional block 53 is installed on the surface of the block 5 through the installation hole 532 and the plug post 531 to increase the height of the block 5 so that after the block 5 slides in the inclined groove 31, the block 5 can contact and squeeze the inner wall of the hollow shaft workpiece 13;

[0087] A plurality of groups of positioning columns 3 are arranged in the fixing tool. When the length of the hollow shaft workpiece 13 is relatively long, the staff can add one or more positioning columns 3 on the basis of the existing positioning columns through the connecting rod 6 and the fixing rod 61, thereby increasing the number of fixed positions of the hollow shaft workpiece 13 with a long length when positioning and fixing it, and making the fixing position of the tool for the hollow shaft workpiece 13 with a long length close to the middle part thereof.

[0088] By staggering adjacent positioning columns 3 to form an angle difference, forces are applied to the hollow shaft workpiece 13 in all directions around the circumference, so that the internal expansion force on the relatively long hollow shaft workpiece 13 is more evenly distributed.

[0089] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A new energy motor hollow shaft turning device, comprising a machining center, a workbench (1) of the machining center is installed with a fixed tool, and the fixed tool is used to position and fix the hollow shaft workpiece (13); Features: The fixing tool comprises a first bracket (11) and a second bracket (12), the first bracket (11) and the second bracket (12) are both mounted with a mounting rod (2), an electric telescopic rod (21) is mounted inside the mounting rod (2), a positioning column (3) is mounted on the mounting rod (2), an extrusion rod (34) is mounted in the middle of the positioning column (3), and the extrusion rod (34) and the electric telescopic rod (21) are connected to each other; An elastic block (24) is installed between the installation rod (2) and the positioning column (3); a sliding cavity (22) is provided in the installation rod (2); a movable rod (23) is slidably installed in the sliding cavity (22); the other end of the movable rod (23) is installed on the positioning column (3); the movable rod (23) passes through the middle of the elastic block (24); and a baffle (4) is installed on one end of the installation rod (2) close to the positioning column (3); The positioning column (3) is provided with a plurality of groups of inclined grooves (31) evenly arranged around the axis, the bottom surface of the inclined groove (31) is provided with a guide groove (32), the guide groove (32) is provided with a slide groove (33), a clamping block (5) is installed in the inclined groove (31), a sliding block (51) is installed below the clamping block (5), and the sliding block (51) and the slide groove (33) cooperate with each other; A connecting groove (52) is provided on the side of the slide block (51), a connecting rod (35) is installed in the guide groove (32), one end of the connecting rod (35) slides in the connecting groove (52), and the other end of the connecting rod (35) is fixedly connected to the extrusion rod (34); The positioning column (3) is inserted into the hollow shaft workpiece (13), the clamping block (5) contacts and presses the inner wall of the hollow shaft workpiece (13), and the hollow shaft workpiece (13) is blocked by the baffle (4); A plurality of pressure blocks (42) are installed on the baffle (4), the pressure blocks (42) are evenly distributed around the axis of the mounting rod (2), the pressure blocks (42) are in contact with the outer surface of the hollow shaft workpiece (13), and one end of the pressure block (42) facing the hollow shaft workpiece (13) is an inclined surface or an arc-shaped surface; An elastic layer (45) is installed on the baffle (4), and the thickness of the elastic block (24) is greater than the thickness of the elastic layer (45); The baffle (4) is provided with a rectangular groove (41), the pressing block (42) is slidably installed in the rectangular groove (41), an elastic telescopic rod (43) is installed between the side of the pressing block (42) away from the hollow shaft workpiece (13) and the rectangular groove (41), a cushion block (44) is installed between the side of the pressing block (42) close to the hollow shaft workpiece (13) and the rectangular groove (41), and the thickness of the cushion block (44) is less than or equal to the distance between the side of the rectangular groove (41) close to the positioning column (3) and the outer surface of the hollow shaft workpiece (13); A mounting hole (532) is provided on the surface of the clamping block (5), a plug post (531) is inserted into the mounting hole (532), and an additional block (53) is installed on the plug post (531); The plug post (531) is magnetic, the plug post (531) and the mounting hole (532) are in interference fit, and the increase block (53) has a variety of thickness sizes; There are a plurality of groups of positioning posts (3), the extrusion rods (34) are connected to each other via connecting rods (6), adjacent positioning posts (3) are connected via fixing rods (61), and the connecting rods (6) and fixing rods (61) between two adjacent positioning posts (3) are of the same length.

2. According to claim 1, a new energy motor hollow shaft turning equipment is characterized in that: A hydraulic bag is installed in the elastic telescopic rod (43), and the hydraulic bags in the elastic telescopic rods (43) are interconnected.

3. According to claim 1, a new energy motor hollow shaft turning equipment is characterized in that: There is an angle difference between the projections of adjacent positioning columns (3) on the baffle (4).

4. A new energy motor hollow shaft turning process, characterized by: The process is applicable to a new energy motor hollow shaft turning device as described in any one of claims 1 to 3 above: S1: The first bracket (11) and the second bracket (12) in the fixed tool are respectively fixed to the workbench (1), and at the same time, the mounting rod (2) on the first bracket (11) is fixed by the rotating chuck on the machining center, and the second bracket (12) is installed on the slide rail on the workbench (1); S2: Sleeve the two ends of the hollow shaft workpiece (13) onto the positioning columns (3) on the first bracket (11) and the second bracket (12), and then move the second bracket (12) so that the hollow shaft workpiece (13) is supported by the first bracket (11) and the second bracket (12); S3: sequentially controlling the movement of the electric telescopic rod (21) in the first bracket (11) and the second bracket (12), so that the end of the hollow shaft workpiece (13) close to the first bracket (11) is first fixed, and then the end of the hollow shaft workpiece (13) close to the second bracket (12) is fixed, and then the second bracket (12) is locked on the slide rail; S4: Start the machining center and perform turning processing on the hollow shaft workpiece (13) according to a predetermined program. After the processing is completed, the hollow shaft workpiece (13) is removed.

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