A high-precision cutting device for machining precision automotive parts using powder metallurgy

Abstract

This invention provides a high-precision cutting device for machining precision automotive parts using powder metallurgy, relating to the field of powder metallurgy precision machining technology. It includes: a machine tool body; a drive unit mounted on the top of the machine tool body to clamp one end of a workpiece; a support unit opposite to the drive unit, slidably mounted on the machine tool body to elastically support the other end of the workpiece; and a cutting tool unit mounted on the machine tool body and located on one side of the workpiece. The cutting tool unit includes: a positioning mechanism, a front cutting tool assembly, a rear cutting tool assembly, and a scraping assembly. The positioning mechanism is mounted on the machine tool body, and the front and rear cutting tool assemblies are sequentially arranged side-by-side and slidably mounted on the power output end of the positioning mechanism. The rear cutting tool assembly is located on the side near the support unit. This invention effectively ensures the cutting accuracy of high-hardness powder metallurgy automotive precision parts by utilizing two sets of cutting tools to cut the workpiece at a preset cutting position.

Description

Technical Field

[0001] This invention relates to the field of powder metallurgy precision machining technology, and in particular to a high-precision cutting device for machining precision automotive parts using powder metallurgy. Background Technology

[0002] Powder metallurgy is a process technology that uses metal powders (or mixtures of metal and non-metal powders) as raw materials, followed by forming and sintering, to manufacture metallic materials, composite materials, and various types of products. In the automotive industry, powder metallurgy is also frequently used to manufacture high-precision parts. Currently, powder metallurgy parts are often machined using hardened or ceramic cutting tools.

[0003] When using cutting tools to cut powder metallurgy workpieces, the workpieces have relatively high hardness, and during the tool stroke, the workpiece surface is cut into spiral protrusions. Conventional grinding methods are not only inefficient but also difficult to effectively grind and clean these spiral protrusions, thus affecting the workpiece's accuracy after cutting. Moreover, the workpiece is often directly clamped at both ends during cutting, and the roundness of the workpiece before clamping further reduces the overall cutting accuracy. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a high-precision cutting device for machining precision automotive parts using powder metallurgy, which solves the problem that in the prior art, when precision machining powder metallurgy rod-shaped workpieces, the cutting difficulty is caused by the hardness of the workpiece, and spiral protrusions are easily formed on the workpiece surface, making it difficult to accurately locate and deal with them in time, thus affecting the cutting accuracy of the workpiece.

[0005] To achieve the above and other related objectives, the present invention provides a high-precision cutting device for machining precision automotive parts using powder metallurgy, comprising: a machine tool body; a drive unit mounted on the top of the machine tool body for clamping one end of a workpiece; a support unit disposed opposite to the drive unit and slidably mounted on the machine tool body for elastically supporting the other end of the workpiece; and a cutting tool unit mounted on the machine tool body and located on one side of the workpiece, the cutting tool unit comprising: a positioning mechanism, a front cutting tool assembly, a rear cutting tool assembly, and a scraping assembly, the positioning mechanism being mounted on the machine tool body, and the front cutting tool assembly and the rear cutting tool assembly being arranged in parallel and slidably mounted. The rear tool assembly is located on the side near the support part, mounted on the power output end of the positioning mechanism. It pushes the support part away from the end of the uncut workpiece until the front and rear tool assemblies complete the cutting and leave the support part. Then, the support part returns to circumferentially position and clamp the workpiece. The cleaning component is located between the front and rear tool assemblies to clean the cutting particles of the front tool assembly when cutting towards the drive part and to clean the cutting particles of the rear tool assembly when cutting towards the support part. The spiral protrusion formed by the cutting trajectory of the front tool assembly is the cutting trajectory of the rear tool assembly.

[0006] In one embodiment of the present invention, the drive unit includes: a drive body mounted on a machine tool body; and a drive seat mounted on the power output end of the drive body. The drive seat is provided with a first adjustment groove in the circumference, and a clamping block for synchronously moving to clamp toward the workpiece in the radial direction is slidably provided in the first adjustment groove.

[0007] In one embodiment of the present invention, the support part includes: a support seat, a sliding space provided on the machine tool body, the support seat being slidably disposed within the sliding space; a drive handwheel, the drive handwheel being mounted on one side of the machine tool body, and the power output end of the drive handwheel being connected to the support seat to drive the support seat to move back and forth along the sliding space; a support guide seat, one side of the support guide seat being movably inserted into the support seat via a plug rod, and the support guide seat being connected to the support seat via a first spring, the support guide seat being provided with a second adjustment groove circumferentially, and a support block for synchronously moving to adjust the radial support position of the workpiece being slidably disposed in the second adjustment groove; a support guide rod, one end of the support guide rod being mounted on the support block, and the other end of the support guide rod being mounted with a guide wheel, the arrangement direction of the guide wheel corresponding to the arrangement direction of the workpiece; and a push block, one end of the push block being connected to the support guide seat, and the push block being arranged on the side corresponding to the rear tool assembly, so as to push the support guide seat away from the end of the workpiece when the rear tool assembly moves to contact the push block.

[0008] In one embodiment of the present invention, the positioning mechanism includes: a guide frame, which is mounted on the machine tool body and has a guide slide on one side; a positioning seat, which is slidably disposed within the guide slide; a positioning power member, which is mounted on the guide frame and has its power output end connected to the positioning seat; and a drive control component, which is mounted on the positioning seat to control the movement trajectory and cutting trajectory of the front tool assembly and the rear tool assembly.

[0009] In one embodiment of the present invention, the drive control component includes: an axial drive component mounted on a positioning seat, wherein the power output end of the axial drive component is connected to the front tool assembly to drive the front tool assembly, along with the rear tool assembly and the scraping assembly, to move back and forth along the axial direction of the workpiece; and an adjustment track mounted on the positioning seat and located on one side of the top of the front tool assembly and the rear tool assembly to control the front tool assembly to move forward and leave the workpiece surface when it reaches the cutting endpoint, and the rear tool assembly to move backward and leave the workpiece surface when it reaches the cutting endpoint, when the front tool assembly and the rear tool assembly move backward and leave the workpiece surface.

[0010] In one embodiment of the present invention, the axial drive assembly includes: a lead screw, both ends of which are mounted on a positioning seat, and the lead screw thread passes through a front tool assembly; and a drive motor, which is mounted on the positioning seat and the power output end of the drive motor is connected to the lead screw to drive the lead screw to rotate.

[0011] In one embodiment of the present invention, the adjusting track includes: an intermediate guide plate, which is installed at the middle position of the inner wall of the positioning seat, and the lower surface of the intermediate guide plate is a linear rail; a front guide plate, one end of which is movably inserted into the first end of the two intermediate guide plates, and the other end of the front guide plate has a front jump cutter groove corresponding to the top of the front tool assembly, so that when the front tool assembly reaches the front jump cutter groove, it leaves the cutting trajectory; a rear guide plate, one end of which is movably inserted into the second end of the two intermediate guide plates, and the other end of the rear guide plate has a rear jump cutter groove corresponding to the top of the rear tool assembly, so that when the rear tool assembly reaches the rear jump cutter groove, it leaves the cutting trajectory; a front adjusting motor, which is installed on the positioning seat and the power output end of the front adjusting motor is connected to the front guide plate; and a rear adjusting motor, which is installed on the positioning seat and the power output end of the rear adjusting motor is connected to the rear guide plate.

[0012] In one embodiment of the present invention, the front tool assembly includes: a front movable bracket threaded onto a lead screw; a front tool movably inserted into the bottom of the front movable bracket, the top of the front tool movably extending out of the top of the front movable bracket via a front push rod, and one side of the top of the front tool being elastically connected to the inner top of the front movable bracket via a second spring; a front guide head mounted on one side of the top of the front push rod, one side of the front guide head having a rear guide groove corresponding to the front jump cutter groove rail, and one bottom side of the front guide head having a front control switch for controlling the scraping assembly to extend towards the workpiece surface, the front control switch corresponding to the top side of the front movable bracket; and a distance adjustment motor mounted on the front movable bracket, the power output end of the distance adjustment motor being connected to the rear tool assembly to adjust the distance between the front tool and the rear tool assembly.

[0013] In one embodiment of the present invention, the rear cutter assembly includes: a rear movable bracket that slides through a lead screw and is connected to the power output end of a distance adjustment motor; a rear cutter that is movably inserted into the bottom of the rear movable bracket, the top of the rear cutter extending movably out of the top of the rear movable bracket via a rear push rod, and one side of the top of the rear cutter being elastically connected to the inner top of the rear movable bracket via a third spring; a rear guide head that is mounted on the top side of the rear push rod, one side of the rear guide head having a front guide groove corresponding to the rear skip tool groove rail, and the bottom side of the rear guide head having a rear control switch for controlling the scraping assembly to extend toward the workpiece surface, the rear control switch corresponding to the top side of the rear movable bracket; and a push bracket that is mounted on the rear movable bracket to push the support portion to move away from the end of the workpiece.

[0014] In one embodiment of the present invention, the scraping assembly includes: a mounting frame, which is mounted on one side of a front movable bracket; a scraping motor, which is mounted on the mounting frame; a lifting seat, which is mounted on the power output end of the scraping motor, with push grooves on both sides of the bottom of the lifting seat, and push-pull plates slidably disposed in the push grooves, with one side of the push-pull plate and the inner wall of the push groove connected by a fourth spring; a scraping blade, which is made of soft material, with both ends of the scraping blade connected to the lower ends of the two push-pull plates respectively; and air blowing pipes, with two air blowing pipes in an L shape connected to both sides of the mounting frame respectively, and the mounting frame also having an air inlet connected to the air blowing pipes; wherein, when the front control switch is in the released state or the rear control switch is in the released state, the scraping motor controls the scraping blade to gradually move away from the workpiece surface.

[0015] As described above, the high-precision cutting device for machining powder metallurgy automotive precision parts of the present invention has the following beneficial effects: Through the mutual cooperation between the driving part, the supporting part, and the cutting tool part, when the cutting tool part cuts along one end of the workpiece to the other, the supporting part moves away from the end of the workpiece it supports, and resumes support only after the cutting tool part has completed cutting the end of the workpiece. This ensures the accuracy of the positioning of the cutting tool part when supporting the workpiece through the driving part and the supporting part during the cutting process, thereby improving the accuracy of cutting the workpiece. Furthermore, when the cutting tool part cuts the workpiece, the mutual cooperation between the front cutting tool assembly and the rear cutting tool assembly facilitates the direct and one-time removal of the spiral protrusions formed when the front cutting tool assembly cuts the workpiece during the cutting of high-hardness powder metallurgy workpieces. This is achieved by the rear cutting tool assembly following the movement trajectory of the front cutting tool assembly, ensuring the precision level of the cutting surface of the high-hardness powder metallurgy workpiece. Furthermore, when the front and rear tool assemblies work together for cutting, the structural design of the front and rear tool guideways allows the front tool assembly to automatically leave the workpiece surface upon reaching the end of its stroke, allowing only the rear tool assembly to continue cutting until the final cutting point. Similarly, when the front and rear tool assemblies begin to reach the workpiece surface, the front tool assembly contacts the workpiece first for cutting, followed by the rear tool assembly, or during a second return cut, the rear tool assembly leaves the workpiece surface first, followed by the front tool assembly reaching the workpiece end. During the cutting process, a scraping assembly can remove cutting particles from both the front and rear tool assemblies. The scraping blades, secured by a push-pull plate and a fourth spring, further enhance contact with the workpiece surface, and the air blowing system further improves the cleaning effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the high-precision cutting device of the present invention.

[0017] Figure 2 This is a schematic diagram of the structure of the high-precision cutting device of the present invention after the cover is removed.

[0018] Figure 3 This invention is shown as Figure 2 A schematic diagram of the high-precision cutting device after the middle positioning seat has been cut open.

[0019] Figure 4 This is an enlarged view of the structure of the positioning seat of the present invention after being cut open.

[0020] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle.

[0021] Figure 6 This is a structural layout diagram of the front cutting tool assembly, rear cutting tool assembly, and cleaning assembly of the present invention.

[0022] Figure 7 This is a schematic diagram of the cleaning and scraping assembly of the present invention.

[0023] Figure 8 This is a structural layout diagram of the support unit of the present invention on the machine tool body. Detailed Implementation

[0024] Please see Figure 1 This invention provides a high-precision cutting device for machining precision automotive parts using powder metallurgy, comprising: a machine tool body 1; a drive unit 2, mounted on the top of the machine tool body 1 to clamp one end of a workpiece; a support unit 3, disposed opposite to the drive unit 2 and slidably mounted on the machine tool body 1 to elastically support the other end of the workpiece; and a cutting tool unit 4, mounted on the machine tool body 1 and located on one side of the workpiece, the cutting tool unit 4 comprising: a positioning mechanism 41, a front cutting tool assembly 42, a rear cutting tool assembly 43, and a scraping assembly 44, the positioning mechanism 41 being mounted on the machine tool body 1, and the front cutting tool assembly 42 and the rear cutting tool assembly 43 being sequentially arranged side-by-side and slidably mounted on the positioning mechanism 41. At the power output end of 1, the rear tool assembly 43 is located on the side close to the support part 3 to push the support part 3 away from the end of the uncut workpiece until the front tool assembly 42 and the rear tool assembly 43 complete the cutting and leave the support part 3. Then, the support part 3 returns to circumferentially position and clamp the workpiece. The cleaning and scraping assembly 44 is located between the front tool assembly 42 and the rear tool assembly 43 to clean the cutting particles of the front tool assembly 42 when it moves towards the drive part 2 for cutting, and to clean the cutting particles of the rear tool assembly 43 when it moves towards the support part 3 for cutting. The spiral protrusion formed by the cutting trajectory of the front tool assembly 42 is the cutting trajectory of the rear tool assembly 43.

[0025] As can be seen from the above, when precision machining (i.e., precision cutting) of rod-shaped workpieces such as shafts produced by powder metallurgy for automobiles, one end of the workpiece is clamped on the machine tool body 1 using the drive unit 2. By adjusting the support unit 3 to the other end of the workpiece, and ensuring that the support unit 3 can completely leave the end of the workpiece when the rear tool assembly 43 pushes away from the end of the workpiece, a high-precision circumferential surface can be machined from that end of the workpiece using the front tool assembly 42 and the rear tool assembly 43. The adjusted support unit 3 then provides circumferential support for the workpiece, ensuring precise rotation of the workpiece's center axis and improving the precision of surface cutting. Furthermore, when setting the tool on the workpiece surface using the front tool assembly 42 and the rear tool assembly 43, the positioning mechanism 41 drives the front tool assembly 42 and the rear tool assembly 43 to move to the workpiece surface. The drive unit 2 then drives the workpiece to rotate for cutting. Specifically, when cutting using the front tool assembly 42 and the rear tool assembly 43, it is also necessary to maintain the distance between the front tool assembly 42 and the rear tool assembly 43. That is, during the cutting process of the front tool assembly 42, the front tool assembly 42 will also move from one end of the workpiece to the other as the workpiece rotates. Moreover, due to the hardness of the powder metallurgy material, when the front tool assembly 42 rotates, it will form a spiral groove on the surface of the workpiece, which will further be equivalent to forming a spiral protrusion between the spiral grooves that are not cut. At this time, by using the rotational angular velocity of the drive unit 2, the time t required for the workpiece to rotate one revolution can be obtained, and by using the moving speed ν of the front tool assembly 42 and the rear tool assembly 43 from one end of the workpiece to the other, the moving distance s=ν*t of the front tool assembly 42 and the rear tool assembly 43 during one revolution of the workpiece can be determined, and then the shortest distance from the center of the protrusion to the spiral grooves on both sides can be obtained, that is, s / 2=ν*t / 2. If the front tool assembly 42 uses the nth spiral groove after cutting to calibrate the rear tool assembly 43, the distance between the front tool assembly 42 and the rear tool assembly 43 needs to be adjusted to n*ν*t+ν*t / 2. This adjustment allows the rear tool assembly 43 to follow the trajectory of the front tool assembly 42 and cut along the spiral protrusion after the front tool assembly 42 has formed it, ensuring a good cutting effect on the powder metallurgy workpiece surface. When cutting with the front tool assembly 42, a cleaning component 44 located between the front tool assembly 42 and the rear tool assembly 43 can clean the cutting particles from the area where the front tool assembly 42 has finished cutting, preventing them from affecting the subsequent cutting by the rear tool assembly 43. This further avoids scratches on the workpiece surface caused by directly using the rear tool assembly 43 after the front tool assembly 42 has finished cutting.It is worth noting that before clamping one end of the workpiece onto the drive unit 2, pre-processing can be used to adjust the roundness level of the workpiece at that end, thereby improving the machining accuracy during cutting.

[0026] Specifically, the high-precision cutting device of the present invention further includes a cover 11 disposed on one side of the top of the machine tool body 1, which can simultaneously cover the drive part 2, the support part 3, and the tool part 4. In this embodiment, the cover 11 can be used to protect the workpiece during precision cutting.

[0027] like Figure 2 As shown, the drive unit 2 includes: a drive body 21, which is mounted on the machine tool body 1; and a drive seat 22, which is mounted on the power output end of the drive body 21. The drive seat 22 is provided with a first adjustment groove 221 in the circumference, and a clamping block 222 for synchronous movement to clamp the workpiece in the radial direction is slidably provided in the first adjustment groove 221.

[0028] In one embodiment of the present invention, during the use of the drive unit 2, an adjustment port (not shown in the figure) is also provided on the drive body 21. The function of this adjustment port is the same as that of the clamping tool used on existing machine tools, that is, by turning the adjustment port, the clamping blocks 222 in the first adjustment groove 221 are moved in the same direction through the linkage, so as to realize the circumferential clamping and loosening of the workpiece end at the center of the clamping block 222.

[0029] like Figure 2 and 8 As shown, the support unit 3 includes: a support seat 31, with a sliding space 12 provided on the machine tool body 1, and the support seat 31 slidably disposed within the sliding space 12; a drive handwheel 32, which is mounted on one side of the machine tool body 1, and the power output end of the drive handwheel 32 is connected to the support seat 31 to drive the support seat 31 to move back and forth along the sliding space 12; and a support guide seat 33, one side of which is movably inserted into the support seat 31 via a plug 331, and the support guide seat 33 is connected to the support seat 31 via a first spring 332, and the support guide seat 33 is provided with a second adjustment in the circumferential direction. The groove 333 has a support block 334 that is slidably provided in the second adjustment groove 333 for synchronous movement to adjust the radial support position of the workpiece; a support guide rod 34, one end of which is mounted on the support block 334 and the other end of which is mounted on a guide wheel 341, the arrangement direction of which corresponds to the arrangement direction of the workpiece; and a push block 35, one end of which is connected to the support guide seat 33 and is arranged on the side corresponding to the rear tool assembly 43, so that when the rear tool assembly 43 moves to contact the push block 35, it pushes the support guide seat 33 away from the end of the workpiece.

[0030] In one embodiment of the present invention, when the support part 3 supports the workpiece, the position of the support seat 31 is adjusted within the sliding space 12 by driving the handwheel 32 according to the distance between the end of the workpiece and the support seat 31. This allows the support guide rod 34 and the guide wheel 341 to abut against the end of the workpiece when the first spring 332 is in a free state. Specifically, the position of the support block 334 is adjusted within the second adjustment groove 333 on the support guide seat 33 so that the position of the guide wheel 341 at the end of the support block 334 corresponds to the radial dimension of the workpiece after cutting. Under the restriction of the contact block 35 by the rear tool assembly 43, the initial position of the support guide seat 33 is far away from the end of the workpiece. After both the front tool assembly 42 and the rear tool assembly 43 have completed cutting, the support guide seat 33 is pushed towards the end of the workpiece under the elastic force of the first spring 332. By using the positioned guide wheel 341 to abut against the surface of the cut workpiece, end positioning of the workpiece for subsequent cutting operations can be achieved, thereby ensuring the overall cutting accuracy. More specifically, the support base 31 also has an adjustment port (not shown in the figure). The function of this adjustment port is the same as that of the clamping tool used on existing machine tools. That is, by turning the adjustment port, the support blocks 334 in the second adjustment groove 333 are moved in the same direction through linkage, so as to realize the circumferential support and release of the workpiece end at the center of the support block 334.

[0031] like Figure 2 As shown, the positioning mechanism 41 includes: a guide frame 411, which is mounted on the machine tool body 1, and a guide slide 415 is provided on one side of the guide frame 411; a positioning seat 412, which is slidably disposed in the guide slide 415; a positioning power member 413, which is mounted on the guide frame 411 and whose power output end is connected to the positioning seat 412; and a drive control component 414, which is mounted on the positioning seat 412 to control the movement trajectory and cutting trajectory of the front tool assembly 42 and the rear tool assembly 43.

[0032] In one embodiment of the present invention, in the initial state, the positioning mechanism 41, carrying the front tool assembly 42 and the rear tool assembly 43, is positioned away from the workpiece. When it is necessary to cut the workpiece, according to the cutting dimensions, the positioning power component 413, preferably a cylinder, on the guide frame 411 pushes the positioning seat 412 back and forth along the guide slide 415 to adjust the position of the positioning seat 412, thereby further determining the cutting position of the front tool assembly 42 and the rear tool assembly 43. Moreover, during the movement of the front tool assembly 42 and the rear tool assembly 43, the starting and ending positions of the cutting can be adjusted by using the drive control component 414. That is, when the front tool assembly 42 and the rear tool assembly 43 are at the cutting starting point, the front tool assembly 42 cuts the workpiece first until the rear tool assembly 43 reaches the workpiece surface to cut. When reaching the other end of the workpiece, i.e., the ending point, the front tool assembly 42 leaves the workpiece surface first until the rear tool assembly 43 completes the cutting. After the rear tool assembly 43 completes the cutting, a secondary cutting can be performed on the return trip with the rear tool assembly 43 in front and the front tool assembly 42 behind.

[0033] like Figure 2 and 3 As shown, the drive control component 414 includes: an axial drive component 4141, which is mounted on the positioning seat 412 and whose power output end is connected to the front tool assembly 42 to drive the front tool assembly 42, along with the rear tool assembly 43 and the scraping assembly 44, to move back and forth along the workpiece axial direction; and an adjustment track 4142, which is mounted on the positioning seat 412 and located on the top side of the front tool assembly 42 and the rear tool assembly 43, to control the front tool assembly 42 to move forward and reach the cutting endpoint and leave the workpiece surface, and the rear tool assembly 43 to move backward and reach the cutting endpoint and leave the workpiece surface, when the front tool assembly 42 and the rear tool assembly 43 move back and forth along the workpiece axial direction.

[0034] In one embodiment of the present invention, when the drive control component 414 controls the cutting stroke of the front tool assembly 42 and the rear tool assembly 43, it is mounted on the front tool assembly 42 via the power output end of the axial drive component 4141, enabling the front tool assembly 42 and the rear tool assembly 43 to move synchronously along the axial direction of the workpiece for cutting. When the front tool assembly 42 reaches the cutting endpoint on the adjusting track 4142, it is controlled to leave the workpiece surface and continue moving until the rear tool assembly 43 also reaches the cutting endpoint. Subsequently, the rear tool assembly 43 returns to perform a secondary cut, and after the rear tool assembly 43 leaves, the front tool assembly 42 returns to the workpiece surface for a return stroke and a secondary cut. Similarly, at the starting position of the adjusting track 4142, during the secondary cut, the rear tool assembly 43 first reaches the starting point and leaves the workpiece surface until the front tool assembly 42 completes the secondary cut. Furthermore, during the return stroke, the rear tool assembly 43 pushes the support guide 33, causing the support guide rod 34 and guide wheel 341 to continue leaving the circumferential surface of the workpiece end.

[0035] like Figure 2-4 As shown, the axial drive assembly 4141 includes: a lead screw 41411, the two ends of which are mounted on the positioning seat 412, and the lead screw 41411 is threaded through the front tool assembly 42; and a drive motor 41412, which is mounted on the positioning seat 412, and the power output end of the drive motor 41412 is connected to the lead screw 41411 to drive the lead screw 41411 to rotate.

[0036] In one embodiment of the present invention, the drive motor 41412 can be a servo motor. That is, the drive motor 41412 drives the lead screw 41411 to rotate, thereby moving the threaded front tool assembly 42 axially along the workpiece surface. The front tool assembly 42 will also move back and forth together with the rear tool assembly 43.

[0037] like Figure 3-5As shown, the adjusting track 4142 includes: an intermediate guide plate 41421, which is installed in the middle of the inner wall of the positioning seat 412, and the lower surface of the intermediate guide plate 41421 is a linear track 414211; a front guide plate 41422, one end of which is movably inserted into the first end of the two intermediate guide plates 41421, and the other end of the front guide plate 41422 has a front jump cutter groove track 414221 corresponding to the top of the front tool assembly 42, so that when the front tool assembly 42 reaches the front jump cutter groove track 414221, it leaves the cutting trajectory; and a rear guide plate 41423, one end of which is movably inserted into the two intermediate guide plates 41421. The second end of the side intermediate guide plate 41421 and the bottom side of the other end of the rear guide plate 41423 are provided with a rear jumper groove rail 414231 corresponding to the top of the rear tool assembly 43, so that when the rear tool assembly 43 reaches the rear jumper groove rail 414231, it leaves the cutting trajectory; the front adjusting motor 41424 is mounted on the positioning seat 412, and the power output end of the front adjusting motor 41424 is connected to the front guide plate 41422; and the rear adjusting motor 41425 is mounted on the positioning seat 412, and the power output end of the rear adjusting motor 41425 is connected to the rear guide plate 41423.

[0038] In one embodiment of the present invention, in the adjusting track 4142, the position of the front tool guide rail 414221 is adjusted by moving the front guide plate 41422 back and forth toward the center of the middle guide plate 41421 using the front adjusting motor 41424, thereby adjusting the cutting endpoint position, i.e., the position where the corresponding front tool assembly 42 leaves the workpiece surface. The position of the rear tool guide rail 414231 is adjusted by moving the rear guide plate 41423 back and forth toward the center of the middle guide plate 41421 using the rear adjusting motor 41425, thereby adjusting the cutting start position, i.e., the position where the corresponding rear tool assembly 43 leaves the workpiece surface. Furthermore, when the front tool assembly 42 and the rear tool assembly 43 are cutting the workpiece, the tops of the front tool assembly 42 and the rear tool assembly 43 always abut against the bottom side of the linear track 414211. It is also worth noting that the bottom of the front guide plate 41422 on one side of the front switch rail 414221 and the bottom of the rear guide plate 41423 on one side of the rear switch rail 414231 are on the same plane as the linear rail 414211. This ensures that the front tool assembly 42 and the rear tool assembly 43 can leave the workpiece surface when switching between the front switch rail 414221 and the rear switch rail 414231, respectively.

[0039] like Figure 6As shown, the front tool assembly 42 includes: a front movable bracket 421, which is threaded onto a lead screw 41411; a front tool 422, which is movably inserted into the bottom of the front movable bracket 421, with its top extending through a front push rod 4221, and one side of the top of the front tool 422 being elastically connected to the inner top of the front movable bracket 421 via a second spring 4222; and a front guide head 423, which is mounted on one side of the top of the front push rod 4221. The front guide head 423 has a rear guide groove 4231 on one side, which corresponds to the front jump cutter groove 414221. The bottom side of the front guide head 423 has a front control switch for controlling the scraping assembly 44 to extend to the workpiece surface. The front control switch corresponds to the top side of the front moving bracket 421. The distance adjustment motor 424 is mounted on the front moving bracket 421, and the power output end of the distance adjustment motor 424 is connected to the rear cutter assembly 43 to adjust the distance between the front cutter 422 and the rear cutter assembly 43.

[0040] In one embodiment of the present invention, during the cutting process, the top end of the front guide head 423 of the front tool assembly 42 always abuts against the lower surface of the linear guide 414211 or the bottom of the front guide plate 41422 and the rear guide plate 41423. At this time, the front control switch is held by the top side of the front moving bracket 421, so that the cleaning component 44 is kept on the workpiece surface to perform the cleaning action. When the front guide head 423 moves away from the lower surface of the front guide plate 41422 toward the front jump cutter groove 414221, the elastic force of the second spring 4222 pulls the front tool 422 upward to move away from the workpiece surface. At the same time, the front guide head 423 enters the front jump cutter groove 414221 and continues to move. The front control switch is released, and the cleaning component 44 gradually moves away from the workpiece surface until the rear tool assembly 43 reaches the cutting endpoint of the workpiece. When the rear tool assembly 43 returns after cutting, after it has moved a predetermined distance away, the rear guide groove 4231 on one side of the front guide head 423 moves along the surface of the front skip tool rail 414221, thereby causing the front guide head 423 to gradually move towards the front moving support 421, and allowing the cleaning component 44 to continue to reach the workpiece surface to clean the rear tool assembly 43. During the distance adjustment process between the front tool assembly 42 and the rear tool assembly 43, the distance adjustment motor 424 pushes the rear tool assembly 43 to adjust the distance between it and the front tool assembly 42, i.e., as mentioned above, n*ν*t+ν*t / 2, so as to achieve a one-time cutting treatment of the spiral protrusions during cutting.

[0041] Further, the rear cutter assembly 43 includes: a rear movable bracket 431, which slides through the lead screw 41411 and is connected to the power output end of the distance adjustment motor 424; and a rear cutter 432, which is movably inserted into the bottom of the rear movable bracket 431, with the top of the rear cutter 432 movably protruding from the top of the rear movable bracket 431 via a rear push rod 4321, and one side of the top of the rear cutter 432 spring-loaded with the inner top of the rear movable bracket 431 via a third spring 4322. Sexual connection; rear guide head 433, the rear guide head 433 is installed on the top side of the rear push rod 4321, the rear guide head 433 is provided on one side of the rear guide head 433 with a front guide groove 4331 corresponding to the rear jumper groove rail 414231, the bottom side of the rear guide head 433 is provided with a rear control switch for controlling the scraping assembly 44 to extend toward the workpiece surface, the rear control switch corresponds to the top side of the rear moving bracket 431; and push bracket 434, the push bracket 434 is installed on the rear moving bracket 431 to push the support part 3 to move away from the end of the workpiece.

[0042] In one embodiment of the present invention, during the cutting process, when the rear tool assembly 43 is cutting, the rear guide head 433 will always be in contact with the bottom of the linear guide 414211, the front guide plate 41422, and the rear guide plate 41423. Upon reaching the rear skip groove rail 414231, the rear guide head 433, under the elastic force of the third spring 4322, enters the rear skip groove rail 414231, while the rear tool 432 leaves the workpiece surface until the front tool assembly 42 completes cutting. Similarly, the rear control switch is released, causing the scraping assembly 44 to gradually leave the workpiece surface. During the initial cutting, as the front tool assembly 42 cuts and gradually leaves the starting end of the workpiece, it pulls the rear moving bracket 431 along with it. This causes the front guide groove 4331 on the side of the rear guide head 433 to contact the rear skip groove rail 414231. This causes the rear guide head 433 to gradually move toward the rear moving bracket 431 until the rear tool 432 contacts the workpiece surface for cutting.

[0043] like Figure 7As shown, the cleaning assembly 44 includes: a mounting bracket 441, which is mounted on one side of the front movable bracket 421; a cleaning motor 442, which is mounted on the mounting bracket 441; and a lifting seat 443, which is mounted on the power output end of the cleaning motor 442. Push grooves 4431 are provided on both sides of the bottom of the lifting seat 443. Push-pull plates 4432 are slidably disposed within the push grooves 4431. A fourth spring 443 connects one side of the push-pull plate 4432 to the inner wall of the push groove 4431. The system consists of three parts: a scraper blade 444 made of soft material, with both ends of the scraper blade 444 connected to the lower ends of two push-pull plates 4432; and an air pipe 445, which is L-shaped and connected to both sides of the mounting bracket 441. The mounting bracket 441 is also provided with an air inlet 4451 that communicates with the air pipe 445. When the front control switch or the rear control switch is in the off state, the scraper motor 442 controls the scraper blade 444 to gradually move away from the workpiece surface.

[0044] In one embodiment of the present invention, when the front control switch or the rear control switch is moved away from the top of the front moving bracket 421 or the top of the rear moving bracket 431, the front control switch is in a released state or the rear control switch is in a released state. The cleaning motor 442, preferably a cylinder, lifts the lifting seat 443 away from the workpiece surface. When cleaning the workpiece surface, the cleaning motor 442 moves the lifting seat 443 toward the workpiece side. This causes the cleaning blade 444 to first contact the workpiece surface, and through the elastic force of the fourth spring 4433 on the push-pull plate 4432, the cleaning blade 444 is made to arc-shaped and wrap around the workpiece surface. Then, when the workpiece rotates, the moving cleaning blade 444 cleans the workpiece surface. Furthermore, during cleaning, the air pipe 445 on the corresponding cleaning side can be opened to blow the cleaned particles away from the workpiece surface, thereby releasing the cleaning pressure of the cleaning blade 444. Specifically, by connecting the air source to the air inlet 4451, and by installing solenoid valves on each air blowing pipe 445, when it is necessary to open the corresponding side of the air blowing pipe 445, the corresponding solenoid valve can be opened to achieve air blowing, blowing the particles away from the workpiece and the corresponding scraper blade 444. Moreover, several grooves can be formed on the top surface of the scraper blade 444 to facilitate the bending action of the scraper blade 444, so as to achieve localized coverage and tight adhesion to the workpiece surface.

[0045] In summary, this invention, through the cooperation between the driving part 2, the supporting part 3, and the cutting part 4, enables the supporting part 3 to move away from the workpiece end it supports while the cutting part 4 is cutting along the workpiece from one end to the other. The supporting part 3 then resumes support after the cutting part 4 has finished cutting the workpiece end. This ensures the accuracy of the positioning of the cutting part 4 during the cutting process, as it supports the workpiece through the driving part 2 and the supporting part 3, thereby improving the precision of workpiece cutting. Furthermore, when the cutting part 4 is cutting the workpiece, the cooperation between the front cutting tool assembly 42 and the rear cutting tool assembly 43 facilitates the direct and one-time removal of the spiral protrusions formed by the front cutting tool assembly 42 during the cutting of high-hardness powder metallurgy workpieces. This ensures the precision of the cutting surface of the high-hardness powder metallurgy workpiece. Furthermore, during the simultaneous cutting of the front and rear tool assemblies 42 and 43, the structural design of the front and rear tool guideways 414221 and 414231 facilitates the automatic removal of the front tool assembly 42 from the workpiece surface upon reaching the end of its stroke, allowing only the rear tool assembly 43 to continue the cutting until the end of the subsequent stroke. Similarly, when the front and rear tool assemblies 42 and 43 begin to reach the workpiece surface, the front tool assembly 42 contacts the workpiece first for cutting, followed by the rear tool assembly 43 further contacting the workpiece for cutting, or during a second return cut, the rear tool assembly 43 removes from the workpiece surface first, followed by the front tool assembly 42 reaching the workpiece end. Moreover, during the cutting process, the scraping assembly 44 can be used to clean the cutting particles from both the front and rear tool assemblies during the initial cutting. Furthermore, by utilizing the tensioning design of the push-pull plate 4432 and the fourth spring 4433, the contact between the cleaning blade 444 and the workpiece surface can be further improved. The air blowing process through the air pipe 445 further enhances the cleaning effect on the workpiece. Therefore, this invention effectively overcomes the various shortcomings of the prior art and has high industrial applicability.

[0046] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A high-precision cutting device for powder metallurgy automobile precision parts processing, characterized by, The machine tool comprises a machine tool body (1), a driving rotating part (2) installed on the top of the machine tool body (1) to clamp one end of a workpiece, a supporting part (3) oppositely arranged with the driving rotating part (2) and slidingly arranged on the machine tool body (1) to elastically support the other end of the workpiece, and a tool part (4) installed on the machine tool body (1) and located on one side of the workpiece, wherein the tool part (4) comprises a positioning mechanism (41) installed on the machine tool body (1), a front tool assembly (42) and a rear tool assembly (43) which are slidingly installed on the power output end of the positioning mechanism (41) in sequence and side by side, and a cleaning and scraping assembly (44) arranged between the front tool assembly (42) and the rear tool assembly (43) to clean the cutting particles of the front tool assembly (42) when moving in the direction towards the driving rotating part (2) and clean the cutting particles of the rear tool assembly (43) when moving in the direction towards the supporting part (3). The driving control assembly (414) comprises an axial driving assembly (4141) installed on the positioning seat (412) and connected with the front tool assembly (42) at the power output end thereof to drive the front tool assembly (42) to move back and forth along the axial direction of the workpiece with the rear tool assembly (43) and the cleaning and scraping assembly (44). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ An adjusting rail (4142) is mounted on the positioning seat (412) and located at the top side of the front tool assembly (42) and the rear tool assembly (43) to control the front tool assembly (42) to leave the workpiece surface when moving forward to the cutting end point and the rear tool assembly (43) to leave the workpiece surface when moving backward to the cutting end point when the front tool assembly (42) and the rear tool assembly (43) move back and forth along the workpiece axial direction; The axial driving assembly (4141) comprises: A lead screw (41411) having two ends mounted on the positioning seat (412) and threaded through the front tool assembly (42); and A driving motor (41412) mounted on the positioning seat (412) and having a power output end connected with the lead screw (41411) to drive the lead screw (41411) to rotate; The adjusting rail (4142) comprises: A middle guide plate (41421) mounted at the middle position of the inner wall of the positioning seat (412), the lower surface of the middle guide plate (41421) being a straight rail (414211); A front guide plate (41422) having one end movably inserted into the first end of the two middle guide plates (41421) and the other end having a front tool jump groove rail (414221) corresponding to the top of the front tool assembly (42) at the bottom side to make the front tool assembly (42) leave the cutting track when reaching the front tool jump groove rail (414221); A rear guide plate (41423) having one end movably inserted into the second end of the two middle guide plates (41421) and the other end having a rear tool jump groove rail (414231) corresponding to the top of the rear tool assembly (43) at the bottom side to make the rear tool assembly (43) leave the cutting track when reaching the rear tool jump groove rail (414231); A front adjusting motor (41424) mounted on the positioning seat (412) and having a power output end connected with the front guide plate (41422); and A rear adjusting motor (41425) mounted on the positioning seat (412) and having a power output end connected with the rear guide plate (41423); The front tool assembly (42) comprises: A front moving bracket (421) threaded mounted on the lead screw (41411); A front tool (422) movably inserted into the bottom of the front moving bracket (421), the top of the front tool (422) movably penetrates the top of the front moving bracket (421) through a front top rod (4221), and the top side of the front tool (422) is elastically connected between the inner top of the front moving bracket (421) through a second spring (4222); A front guide head (423) installed on the top side of the front top rod (4221), one side of the front guide head (423) is provided with a rear guide groove (4231) corresponding to the front tool jumping groove rail (414221), and the bottom side of the front guide head (423) is provided with a front control switch for controlling the cleaning and scraping assembly (44) to extend to the surface of the workpiece, and the front control switch corresponds to the top side of the front moving bracket (421); and A distance adjusting motor (424) installed on the front moving bracket (421), and the power output end of the distance adjusting motor (424) is connected with the rear tool assembly (43) to adjust the distance between the front tool (422) and the rear tool assembly (43); The rear tool assembly (43) comprises: A rear moving bracket (431) sliding through the lead screw (41411), and the rear moving bracket (431) is connected to the power output end of the distance adjusting motor (424); A rear tool (432) movably inserted into the bottom of the rear moving bracket (431), the top of the rear tool (432) movably penetrates the top of the rear moving bracket (431) through a rear top rod (4321), and the top side of the rear tool (432) is elastically connected between the inner top of the rear moving bracket (431) through a third spring (4322); A rear guide head (433) installed on the top side of the rear top rod (4321), one side of the rear guide head (433) is provided with a front guide groove (4331) corresponding to the rear tool jumping groove rail (414231), and the bottom side of the rear guide head (433) is provided with a rear control switch for controlling the cleaning and scraping assembly (44) to extend to the surface of the workpiece, and the rear control switch corresponds to the top side of the rear moving bracket (431); and A pushing bracket (434) installed on the rear moving bracket (431) to push the supporting part (3) to move away from the end of the workpiece.

2. The high-precision cutting apparatus for powder metallurgy automobile precision part machining according to claim 1, characterized by: The driving and rotating part (2) comprises: A driving and rotating body (21) installed on the machine tool body (1); and A driving and rotating seat (22) installed on the power output end of the driving and rotating body (21), and the driving and rotating seat (22) is circumferentially provided with a first adjusting groove (221), and a clamping block (222) for synchronous movement to clamp in the radial direction of the workpiece is slidably arranged in the first adjusting groove (221).

3. The high-precision cutting apparatus for powder metallurgy automotive precision parts according to claim 1, characterized by: The supporting part (3) comprises: A supporting seat (31) is provided on the machine tool body (1) with a sliding space (12), and the supporting seat (31) is slidingly arranged in the sliding space (12); A driving hand wheel (32) is installed on one side of the machine tool body (1), and the power output end of the driving hand wheel (32) is connected with the supporting seat (31) to drive the supporting seat (31) to move back and forth along the sliding space (12); A supporting guide seat (33) is movably arranged on the supporting seat (31) through a plug rod (331), and the supporting guide seat (33) is connected with the supporting seat (31) through a first spring (332), and a second adjusting groove (333) is arranged on the supporting guide seat (33) in a circumferential direction, and a supporting block (334) for synchronous movement is slidingly arranged in the second adjusting groove (333) to adjust the radial supporting position of the workpiece; A supporting guide rod (34) is installed on one end of the supporting block (334), and a guide wheel (341) is installed on the other end of the supporting guide rod (34), and the arrangement direction of the guide wheel (341) corresponds to the arrangement direction of the workpiece; and A push block (35) is connected on one end of the supporting guide seat (33), and the push block (35) is arranged on the corresponding side of the rear cutter assembly (43) to push the supporting guide seat (33) away from the end of the workpiece when the rear cutter assembly (43) moves to contact the push block (35).

4. The high-precision cutting apparatus for powder metallurgy automobile precision part machining according to claim 1, characterized by: The cleaning and scraping assembly (44) comprises: A mounting bracket (441) is installed on one side of the front moving bracket (421); A cleaning and scraping motor (442) is installed on the mounting bracket (441); A lifting seat (443) is installed on the power output end of the cleaning and scraping motor (442), and push grooves (4431) are arranged on both sides of the bottom of the lifting seat (443), and push-pull plates (4432) are slidingly arranged in the push grooves (4431), and the push-pull plates (4432) are connected with the inner walls of the push grooves (4431) through fourth springs (4433); The cleaning and scraping piece (444) is made of soft material, and the two ends of the cleaning and scraping piece (444) are connected to the lower ends of the two push-pull plates (4432); and Two L-shaped blowing pipes (445) are connected to the two sides of the mounting bracket (441), and the mounting bracket (441) is further provided with an air inlet (4451) connected with the blowing pipes (445); When the front control switch is in the released state or the rear control switch is in the released state, the cleaning and scraping motor (442) controls the cleaning and scraping piece (444) to gradually move away from the surface of the workpiece.

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