Chamfering machine for inner and outer end faces of hardware sleeve

Abstract

The invention discloses a chamfering machine for the inner and outer end faces of a hardware sleeve, and belongs to the technical field of pipe fitting processing machine tools, the chamfering machine for the inner and outer end faces of the hardware sleeve comprises a base and further comprises a workbench fixed on the top surface of the base, two inclined feeding rails are installed on the workbench, and the workbench can adjust the distance between the two feeding rails. Through the design of the positioning assembly and the milling assembly, two independent tool bits are used for conducting inner chamfering and outer chamfering on a material pipe, simultaneous inner chamfering and outer chamfering are avoided, the complexity of a tool is reduced, the two independent tool bits are used, targeted replacement can be conducted, the maintenance cost is reduced, the pressure borne by the end of the material pipe is reduced through separated chamfering, and the machining efficiency is improved. And wave-shaped deformation of the chamfering position of the thin-wall material pipe is eliminated.

Description

Technical Field

[0001] The invention belongs to the technical field of pipe processing machine tools, and in particular relates to a machine for processing inner and outer end chamfering of a hardware sleeve. Background Art

[0002] Metal casing is a commonly used building material, mainly used in pipeline projects. They are made of metal and their main function is to provide support and protection for the pipeline system, ensuring the safe and stable operation of the pipeline system. They can also prevent soil erosion and other external factors, thereby extending the service life of the pipeline.

[0003] In order to facilitate the assembly of the sleeve to the outside of the pipeline, the sleeve needs to be chamfered at the end to ensure smooth installation and avoid the sharp end surface from scratching the pipeline and operators;

[0004] The existing Chinese invention patent with publication number CN109365836A discloses a device for chamfering the end face of a casing using a special-shaped cutter head. The special-shaped cutter head has a notch in the middle, and the notch is clamped at the end position of the casing for rotation chamfering, so that internal and external chamfering can be performed simultaneously;

[0005] In actual use, because chamfering belongs to the metal cutting process, the manufacturing process of the special-shaped cutter head is complicated, the alignment accuracy requirements are high, and it can only adapt to the chamfering of the sleeve of the same size and specific depth. During processing, the contact position of the special-shaped cutting edge and the inner and outer edges of the sleeve is very close, which causes the notch of the special-shaped cutter head to heat up sharply, aggravating the wear of the special-shaped cutter head. The internal and external chamfering is carried out at the same time, and a large pressure needs to be applied. Especially in the simultaneous chamfering of thin-walled sleeves, the pressure applied to the end of the thin-walled sleeve is too large, which makes the end of the thin-walled sleeve prone to wavy deformation. In view of this, a hardware sleeve inner and outer end face chamfering machine is provided. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the disadvantages of the prior art and provide a machine for chamfering the inner and outer end surfaces of a hardware casing.

[0007] The technical solution adopted to solve the above technical problems is:

[0008] A metal sleeve inner and outer end surface chamfering machine comprises a base, and also comprises: a workbench fixed on the top surface of the base, two inclined material feeding rails are installed on the workbench, and the workbench can adjust the distance between the two material feeding rails;

[0009] A milling assembly located at the unloading position of the loading rail, the milling assembly includes a cutter head 1 and a cutter head 2, the cutter head 1 can chamfer the inner edge of the material tube, the cutter head 2 can chamfer the outer edge of the material tube, and the height of the cutter head 1 is higher than that of the cutter head 2;

[0010] A positioning assembly located at the milling position of the milling assembly, the positioning assembly comprising two end frames, the spacing between the two end frames being able to be adjusted synchronously with the spacing between the two material loading rails, a milling channel for allowing the material pipe to pass through the middle axis position of the first cutter head and the middle axis position of the second cutter head in sequence is opened on the vertical outer wall on one side of the two end frames, the end frame being located on the side where the milling channel is opened is provided with a support rod 1 and a support rod 2, the support rod 1 and the support rod 2 being able to extend into the milling channel to keep the material pipe at the same height position of the first cutter head and the second cutter head;

[0011] The feeding assembly is located between the two positioning assemblies, and the feeding assembly includes a limit frame, a slider 1, a slider 2 and a liner. The top end of the slider 2 is higher than the bottom edge of the loading rail. The slider 2 can drive the slider 1 to translate synchronously during the translation away from the liner and cooperate with the limit frame to push the slider 1 upward. The upward movement of the slider 1 can push a material tube at the lowest point of the loading rail over the top end of the slider 2 and enter the milling channel. The translation of the slider 1 can push all the material tubes in the loading rail away from the slider 2. The slider 2 can translate close to the liner to clamp the material tube entering the milling channel at the center line position of the milling channel.

[0012] Furthermore, the milling assembly includes a power source and a shell, and the power source drives the cutter head one and the cutter head two to rotate through a transmission shaft. The transmission shaft can translate in the middle of the shell to make the cutter head one and the cutter head two close to the material pipe. The transmission shaft provides a translational driving force through a telescopic rod, and a limiting rod is installed between the telescopic rod and the shell.

[0013] Through the above technical solution, the milling assembly needs to have the ability to translate and rotate in order to realize the milling action of cutter head one and cutter head two. Specifically, the power source is a servo motor, which can provide rotational driving force for cutter head one and cutter head two through the transmission shaft, and the telescopic rod can drive the transmission shaft to slide horizontally. The engagement between the transmission shaft and the servo motor adopts a sliding engagement structure of a spline shaft and a spline sleeve, which can ensure that cutter head one and cutter head two can translate closer to and away from the material pipe without affecting the rotation of cutter head one and cutter head two.

[0014] Furthermore, the positioning assembly also includes a receiving channel, which is located at the top opening of the milling channel, and the top diameter of the receiving channel gradually increases. One of the end frames is located on the material-facing side of the milling channel and is provided with a buffer plate. The end frame is provided with position detection component 1, position detection component 2 and position detection component 3 corresponding to the receiving channel, cutter head 1 and cutter head 2, respectively.

[0015] Through the above technical scheme, in order to improve the success rate of material loading, a receiving channel is set at the top opening of the milling channel. The trumpet-shaped receiving channel can ensure that the material tube falls smoothly into the milling channel. The buffer plate can flexibly deform to buffer the impact force of falling, and prevent the material tube from bouncing disorderly and being supported at the top opening of the milling channel. Position detection component 1 can detect whether there is a material tube supported at the top opening of the milling channel. Position detection component 2 and position detection component 3 respectively detect whether the material tube falls smoothly to the position of cutter head 1 and cutter head 2, thereby ensuring smooth material loading, providing feedback signals for the action of the device, and improving the smoothness of work.

[0016] Furthermore, the milling channel has a shape that is narrow at the top and wide at the bottom, and a processing hole 1 is opened at a position of the end frame facing the first cutter head, and a processing hole 2 is opened at a position of the end frame facing the second cutter head.

[0017] Through the above technical scheme, in order to prevent the debris generated by chamfering from affecting the continuous chamfering process, when chamfering the inner edge, the cutter head 1 moves horizontally in the processing hole 1 and pushes the generated debris toward the processing hole 1. The guide end frame is away from one side of the material tube to prevent the debris from directly falling and affecting the chamfering process of the lower material tube. The inner chamfering is first performed at a high position, and then the outer chamfering is performed at a low position. The material tube with the inner chamfer at a high position falls to the support rod 2 and stops. The buffer plate is arranged vertically and is always in contact with the material tube. The buffer plate will hinder the falling speed of one end of the material tube, causing the material tube to tilt to the end with a faster falling speed, and cooperate with the impact generated by the fall and contact with the support rod 2 to vibrate out the debris at the inner hole position, and complete the cleaning of the inner hole after chamfering. The processing hole 2 adopts a semi-closed structure with an open bottom, and the inner diameter is greater than 1.5 times the outer diameter of the cutter head 2, leaving sufficient discharge gap to ensure that the debris generated when the lower material tube is chamfered externally will directly fall to the base and will not accumulate at the chamfering position.

[0018] Furthermore, the positioning assembly also includes two wedge blocks, which are respectively arranged at processing hole one and processing hole two. The wedge blocks are detachably fixed by a connecting plate, a buckle is provided in the middle of the connecting plate, and a socket is detachably provided on the outer side of the buckle, and the socket can drive the wedge blocks out of the range of processing hole one and processing hole two.

[0019] Furthermore, the limit frame is provided with an inclined hole consistent with the inclination angle of the loading rail, a sliding pin is fixedly installed on the lower part of the slider, the sliding pin slides in contact with the inner wall of the inclined hole, a dovetail head is provided on the side of slider one close to slider two, and a dovetail groove is provided on the vertical side wall of slider two for the dovetail head to slide up and down.

[0020] Through the above technical scheme, in order to ensure that slider one can move up smoothly when slider two moves backward, an inclined hole is opened on the limit frame, and a sliding pin fixedly connected to slider one is inserted into the inclined hole. When slider two moves backward, the inner wall of the bottom end of the inclined hole squeezes the sliding pin upward to move slider one up. Similarly, when slider two moves forward, the inner wall of the top end of the inclined hole squeezes the sliding pin downward to reset slider one. The dovetail head and the dovetail groove slide in cooperation in the vertical direction to ensure the vertical stability of slider one when it moves.

[0021] Furthermore, a clamping block 2 is respectively provided at the same height as the liner, the cutter head 1 and the cutter head 2, and a clamping block 1 is respectively provided at the position of the slider 2 facing the two clamping blocks 2, and grooves are provided in the middle of the clamping block 1 and the clamping block 2.

[0022] Furthermore, the clamp block 2 can be translated forward and backward to adjust the distance between it and the clamp block 1, and the liner is provided with a ruler plate at the position corresponding to the clamp block 2.

[0023] Through the above technical solution, in order to adapt to material pipes with different outer diameters, the clamp block 2 can be adjusted forward and backward, and the actual adjustment distance is determined by the ruler to ensure that the center axis of the material pipe can be centered when clamping, and the center axis of the material pipe will not be moved forward or backward due to changes in the outer diameter. It is ensured that material pipes with different outer diameters can be aligned with the center axes of cutter heads 1 and 2 in the front and back directions after clamping.

[0024] Furthermore, the feeding assembly also includes a servo electric cylinder and a slide seat. The servo electric cylinder is horizontally arranged and provides a driving force for the translation of the second slide block. The bottom end of the second slide block is slidably engaged with the slide seat in a horizontal direction.

[0025] Through the above technical solution, in order to ensure the stability of clamping, the servo electric cylinder can control the extended length according to the material tubes with different outer diameters, so as to ensure that the material tubes with different outer diameters are subjected to the same clamping force, and the slide seat guides the sliding block 2 to ensure that the sliding block 2 is directly opposite to the clamping block 1 front and back, so as to prevent the material tube from being subjected to unbalanced force and torsional deformation due to left and right misalignment, which is suitable for the clamping scenario of thin-walled tubes.

[0026] Furthermore, the workbench includes a movable table and a fixed table, the fixed table is fixedly connected to the base, a driver is installed between the fixed table and the movable table, and the driver can drive the movable table to approach the fixed table.

[0027] The beneficial effects of the present invention are as follows:

[0028] (1) The present invention uses two independent tool heads to perform inner chamfering and outer chamfering of the material tube through the design of the positioning component and the milling component, thereby avoiding the simultaneous performance of inner and outer chamfering and reducing the complexity of the tool. The use of two independent tool heads allows targeted replacement and reduces maintenance costs. Separate chamfering reduces the pressure on the end of the material tube and eliminates the generation of wavy deformation at the chamfer position of the thin-walled material tube.

[0029] (2) The present invention optimizes the positioning assembly and the feeding assembly. The feeding assembly can realize single feeding of the material pipe in one forward and backward movement, and can also complete the dredging and sorting of the upper material pipe during the feeding process. In conjunction with the positioning action of the positioning assembly, the two material pipes can pass through the milling channel in sequence, and perform internal and external chamfers respectively during the passage process, thereby avoiding idling of the cutter head and improving the efficiency of the workstation.

[0030] (3) Through the optimization of the positioning assembly, the present invention can buffer the vibration of the material tube when it enters the milling channel, thereby preventing the material tube from rebounding in an irregular manner and causing poor material feeding. When performing the inner chamfering process, the tool head can guide the generated debris out of the milling channel to prevent excessive debris from affecting the normal passage of the material tube in the milling channel. The falling material tube can also be decelerated on one side and tilted to pour out the debris inside the material tube, thereby completing the debris cleaning of the material tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a first perspective structural diagram of the present invention;

[0032] Figure 2 This is a position structure diagram of the present invention when the base is removed;

[0033] Figure 3 is an enlarged schematic diagram of the milling assembly of the present invention;

[0034] Figure 4 It is a structural schematic diagram of the feeding assembly of the present invention;

[0035] Figure 5 It is a schematic diagram of the position of the feeding assembly of the present invention;

[0036] Figure 6 is a schematic structural diagram of a positioning assembly of the present invention;

[0037] Figure 7 is a partial cross-sectional view of the positioning assembly of the present invention;

[0038] Figure 8 It is a schematic diagram of the position of the chamfering state of the present invention;

[0039] Fig. 9 It is a schematic diagram of the position of the first feeding state of the present invention;

[0040] Fig.10 It is a schematic diagram of the position of the second feeding state of the present invention;

[0041] Fig.11 It is a schematic diagram of the position of the third feeding state of the present invention;

[0042] Fig.12 It is a schematic diagram of the situation when the material pipe of the present invention is blocked.

[0043] Figure numerals: 1, base; 2, workbench; 21, moving table; 22, driver; 23, fixed table; 3, milling assembly; 31, power source; 32, housing; 33, transmission shaft; 34, telescopic rod; 35, cutter head 1; 36, cutter head 2; 37, limit rod; 4, positioning assembly; 41, end frame; 411, processing hole 1; 412, processing hole 2; 413, buffer plate; 42, position detection component 1; 43, position detection component 2; 44, position detection component 3; 45, bearing Connecting channel; 46, milling channel; 47, support rod one; 48, support rod two; 49, wedge block; 491, connecting plate; 492, holder; 493, buckle; 5, feeding assembly; 51, servo cylinder; 52, limit frame; 521, inclined hole; 53, slider one; 531, slide pin; 532, inclined top surface; 54, slider two; 541, clamping block one; 55, liner; 551, clamping block two; 552, ruler plate; 56, slide seat; 6, loading rail; 7, unloading rail; 8, material pipe. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0045] like Figure 1 - Fig.12 As shown, this embodiment provides a metal casing inner and outer end surface chamfering machine, including a base 1, the base 1 provides an installation space and a CNC host for motion control, and also includes: a workbench 2 fixed on the top surface of the base 1, and two inclined feeding rails 6 are installed on the workbench 2, the feeding rails 6 are higher at the back and lower at the front, and the upper material tube 8 is rolled forward for feeding, and the workbench 2 can adjust the distance between the two feeding rails 6 to adapt to material tubes 8 of different lengths;

[0046] For milling assembly 3, refer to Figure 1 The milling assembly 3 is located at the unloading position of the upper material rail 6. The milling assembly 3 includes a cutter head 35 and a cutter head 36. The cutter head 35 can chamfer the inner edge of the material tube 8, and the cutter head 36 can chamfer the outer edge of the material tube 8. The height of the cutter head 35 is higher than that of the cutter head 36. The inner chamfer is performed first, and then the outer chamfer is performed. The inner and outer chamfers are performed separately. The cutter head 35 and the cutter head 36 can be set separately to reduce the complexity of the tool, reduce the maintenance cost, and lengthen the chamfering process, reduce the overheating of the cutter head during processing, and perform the inner and outer chamfers separately. It can also reduce the pressure on the end of the material tube 8 during chamfering, relieve the friction heat at the chamfering position, and eliminate the wave-shaped deformation of the chamfering position of the thin-walled material tube 8;

[0047] For positioning component 4, refer to Figure 1 , Figure 6 and Figure 8 The positioning assembly 4 is located at the milling position of the milling assembly 3. The positioning assembly 4 includes two end frames 41. The spacing between the two end frames 41 can be adjusted synchronously with the spacing between the two loading rails 6 to adapt to material tubes 8 of different lengths. The vertical outer walls of the two end frames 41 on the opposite side are provided with milling channels 46 for allowing the material tube 8 to pass through the center axis position of the cutter head 1 35 and the center axis position of the cutter head 2 36 in sequence. The material tube 8 is limited forward and backward through the milling channel 46 to ensure that the material tube 8 can be processed with inner and outer chamfers in sequence. Specifically, the end frame 41 is provided with a support rod 1 47 and a support rod 2 48 on the side where the milling channel 46 is opened to limit the height of the material tube 8. The support rod 1 47 and the support rod 2 48 can extend into the milling channel 46 to stop the material tube 8 at the same height as the cutter head 1 35 and the cutter head 2 36, to ensure that the material tube 8 can stop at the positions of the cutter head 1 35 and the cutter head 2 36 in sequence;

[0048] Regarding the feeding assembly 5, refer to Figure 4 and Figure 5 The feeding assembly 5 is located between the two positioning assemblies 4. The feeding assembly 5 includes a limiting frame 52, a slider 1 53, a slider 2 54 and a liner 55. The top of the slider 2 54 is higher than the lower edge of the loading rail 6, which can block the upper material tube 8 when not loading. The slider 2 54 can drive the slider 1 53 to translate synchronously during the translation away from the liner 55 and cooperate with the limiting frame 52 to push the slider 1 53 upward. The upward movement of the slider 1 53 can push a material tube 8 at the lowest point of the loading rail 6 to pass over the top of the slider 2 54 and enter the milling channel 46. The front and rear widths of the slider 1 53 are greater than the diameter of one material tube 8 but smaller than the diameters of two material tubes 8, so that materials can be loaded one by one, and the slider 1 53 has an inclined top surface 532 with a low front and a high rear, so that the material tube 8 passing over the top surface of the slider 2 54 can roll forward smoothly. The translation of the slider 1 53 can push all the material tubes 8 in the loading rail 6 away from the slider 2 54, and the remaining material tubes 8 in the loading rail 6 can be pushed and aligned. Fig.12 , to avoid the material tube 8 from twisting in the loading rail 6, and to prevent the unchamfered end surface of the material tube 8 from rubbing against the vertical side wall of the loading rail 6 to cause material jamming, the slider 54 can translate close to the liner 55 to clamp the material tube 8 entering the milling channel 46 at the center line position of the milling channel 46, to center the material tube 8, and to ensure the accuracy of the chamfering.

[0049] In a further embodiment, the milling assembly 3 needs to have translation and rotation capabilities to realize the milling action of the cutter head 1 35 and the cutter head 2 36, referring to Figure 3The milling assembly 3 includes a power source 31 and a housing 32. Specifically, the power source 31 is a servo motor. The cutter head 35 and the cutter head 36 are detachably fixed to the ends of the transmission shaft 33 by a clamp. The servo motor can provide a rotational driving force for the cutter head 35 and the cutter head 36 by meshing with the transmission shaft 33, driving the cutter head 35 and the cutter head 36 to rotate. The telescopic rod 34 can drive the transmission shaft 33 to translate in the middle of the housing 32. The transmission shaft 33 adopts a spline shaft structure. The power source 31 is connected with a spline sleeve. The spline sleeve and the transmission shaft 33 can slide relatively horizontally and keep meshing all the time. The transmission shaft 33 and the housing 32 are connected by a sliding The housing 32 is connected with the transmission shaft 33 by a movable bearing, and the housing 32 can limit the rotation of the transmission shaft 33 without affecting the translation of the transmission shaft 33. The telescopic end of the telescopic rod 34 is connected to the transmission shaft 33 by a bearing, so that the telescopic rod 34 can drive the transmission shaft 33 to move horizontally without affecting the rotation of the transmission shaft 33, thereby making the cutter head 1 35 and the cutter head 2 36 close to the material pipe 8. The transmission shaft 33 provides a translation driving force through the telescopic rod 34. A limiting rod 37 is installed between the telescopic rod 34 and the housing 32. The limiting rod 37 can adjust the distance from the left end to the housing 32 by rotation, and adjust the feed amount of the cutter head 1 35 and the cutter head 2 36 to meet different chamfering depth requirements;

[0050] It should be emphasized that the connection method between the power source 31 and the transmission shaft 33 can also adopt a gear meshing with a larger thickness, where the thickness of the gear is greater than the translational length of the transmission shaft 33, or other translations do not affect the structure of the meshing transmission, and the rotational connection between the telescopic rod 34 and the transmission shaft 33 can also adopt other rotational connection methods besides bearings. No specific limitation is made here and it can be selected according to the usage scenario.

[0051] In a further embodiment, in order to improve the success rate of loading, a specific configuration is provided, referring to Figure 6The positioning component 4 also includes a receiving channel 45, which is arranged at the top opening of the milling channel 46. The top diameter of the receiving channel 45 gradually increases, and the trumpet-shaped receiving channel 45 can ensure that the material tube 8 falls smoothly into the milling channel 46. At the same time, one of the end frames 41 is located on the material-facing side of the milling channel 46 and is provided with a buffer plate 413. The rear end of the buffer plate 413 uses a deformable flexible structure such as a rubber straight strip or a fine brush. The buffer plate 413 can flexibly deform to buffer the falling impact force of the material tube 8, so as to prevent the material tube 8 from bouncing disorderly when contacting the positioning component 4. It is mounted at the top opening of the milling channel 46 to ensure smooth loading, and the end frame 41 is respectively provided with a position detection member 1 42, a position detection member 2 43 and a position detection member 3 44 at the positions corresponding to the receiving channel 45, the cutter head 1 35 and the cutter head 2 36. The position detection member 1 42 can detect whether there is a material tube 8 mounted at the top opening of the milling channel 46, and the position detection member 2 43 and the position detection member 3 44 can respectively detect whether the material tube 8 falls smoothly to the positions of the cutter head 1 35 and the cutter head 2 36, so as to ensure smooth loading, provide feedback signals for the action of the device, and improve the working fluency;

[0052] It should be emphasized that the position detection component 1 42, the position detection component 2 43 and the position detection component 3 44 can use non-contact laser sensors to detect the distance of the object and compare it with the pre-stored standard distance without the material tube 8 to determine whether there is a material tube 8 at the corresponding position. Contact sensors can also be used, such as a touch switch, which can be extended horizontally until it contacts the object and then stop, and the extended length is detected and compared with the pre-stored standard extended length without the material tube 8 to determine whether there is a material tube 8. Similarly, other instruments and mechanical structures for measuring distances can also be used, which will not be repeated here.

[0053] In a further embodiment, in order to prevent the debris generated by the chamfer from affecting the continuous chamfering process, Figure 6 and Figure 7 The end frame 41 is provided with a processing hole 411 facing the cutter head 35. When the inner edge is chamfered, the cutter head 35 moves horizontally in the processing hole 411. Figure 3 The cutter head 35 adopts blades arranged equidistantly welded on the outer wall of the round rod to form a conical outer contour with thin left and thick right, which can be inserted into the middle hole of the material tube 8 for internal chamfering, and there is a gap between the blades to form a chip groove extending in the horizontal direction. The generated chips are pushed by the cutter head 35 along the chip groove horizontally toward the processing hole 411, and the guide end frame 41 is away from one side of the material tube 8 to prevent the chips from falling directly and affecting the chamfering of the material tube 8 at the lower layer;

[0054] The end frame 41 is provided with a second processing hole 412 at the position of the second cutter head 36. The milling channel 46 is narrow at the top and wide at the bottom. The second processing hole 412 is a semi-enclosed structure with an open bottom, and the inner diameter is greater than 1.5 times the outer diameter of the second cutter head 36, leaving sufficient discharge clearance to ensure that the debris generated when the lower material tube 8 is chamfered will directly fall to the base 1 and will not accumulate at the chamfering position.

[0055] It should be noted that the material tube 8 is first chamfered internally at a high position, and then falls to a low position for chamfering externally. The material tube 8 with the internal chamfer at a high position falls to the support rod 48 and stops. The buffer plate 413 is arranged vertically, and the rear end of the buffer plate 413 is always in contact with the material tube 8. The buffer plate 413 will hinder the falling speed of one end of the material tube 8, causing the material tube 8 to tilt toward the end with a faster falling speed, and the contact with the support rod 48 when falling will produce two impacts in succession, vibrating the debris at the inner hole position to the low point of the material tube 8, completing the cleaning of the inner hole after chamfering.

[0056] In a further embodiment, in order to ensure smooth falling and left-right centering during chamfering, refer to Figure 7 The positioning assembly 4 also includes two wedge blocks 49, which are respectively arranged at the processing hole 1 411 and the processing hole 2 412. The wedge blocks 49 are detachably fixed by the connecting plate 491. When loading, the wedge blocks 49 are driven forward by the connecting plate 491 to avoid the range of the milling channel 46, leaving a wider left and right space, so that the material tube 8 can fall smoothly and will not be stuck between the vertical side walls of the milling channel 46. Before chamfering, the wedge blocks 49 are driven backward by the connecting plate 491 to squeeze the material tube 8 from both ends at the same time, center the material tube 8, and align the central axis of the material tube 8 with the central axis of the cutter head 1 35 and the cutter head 2 36. During chamfering, the wedge blocks 49 are driven forward by the connecting plate 491 to avoid the range of the processing hole 1 411 and the processing hole 2 412, and do not affect the horizontal movement of the cutter head 1 35 and the cutter head 2 36.

[0057] Among them, the base 492 is connected to a horizontally arranged hydraulic cylinder, which can drive the wedge block 49 to move horizontally forward and backward through the connecting plate 491, and a buckle 493 is provided in the middle of the connecting plate 491. The cross-section of the buckle 493 is T-shaped, and the narrow part is fixedly connected to the connecting plate 491, and the wide part is suspended and arranged at a position far away from the connecting plate 491. A base 492 is detachably provided on the outer side of the buckle 493, and the base 492 is provided with a bayonet opening facing upward. The buckle 493 is inserted into the base 492 from top to bottom to complete the assembly. When the wedge block 49 needs to be replaced, the connecting plate 491 can be directly lifted to complete the removal of the wedge block 49. The connecting plate 491 and the wedge block 49 are fixed by bolts, so the worn wedge block 49 can be removed and replaced, and the wedge blocks 49 of different thicknesses can also be replaced to adapt to the different spacings between the material tube 8 and the two milling channels 46. Specifically, when a deeper chamfering depth is required, the gap between the two end frames 41 will be reduced by the workbench 2, so that the initial positions of the cutter heads 1 35 and the cutter heads 2 36 are closer to the end face of the material tube 8. At this time, the feed depths of the cutter heads 1 35 and the cutter heads 2 36 remain unchanged, so the milling depth can be increased. Similarly, when a shallower chamfering depth is required, the gap between the two end frames 41 will be adjusted in the opposite direction. Because the adjustable range of the chamfering depth is small, in order to compensate for the poor adjustment accuracy of the workbench 2, the adjusted gap between the end frames 41 can be actually measured, and wedge blocks 49 of different widths can be selected to ensure smooth centering. At the same time, the feed depths of the cutter heads 1 35 and the cutter heads 2 36 can be adaptively adjusted according to the wedge blocks 49 of different widths, so as to eliminate the adjustment error and make the adjustment accuracy of the milling depth higher.

[0058] In a further embodiment, referring to Figure 4 and Figure 5 In order to ensure that the slider 1 53 can move up smoothly when the slider 2 54 moves backward, a specific configuration is disclosed. An inclined hole 521 with the same inclination angle as the loading rail 6 is opened on the limit frame 52. A sliding pin 531 is fixedly installed at the lower part of the slider 1 53. The sliding pin 531 slides in contact with the inner wall of the inclined hole 521. When the slider 2 54 moves backward, the inner wall of the bottom end of the inclined hole 521 squeezes the sliding pin 531 upward, so that the slider 1 53 moves up. Similarly, when the slider 2 54 moves forward, the inner wall of the top end of the inclined hole 521 squeezes the sliding pin 531 downward, so that the slider 1 53 is reset. At the same time, a dovetail head is provided on the side of the slider 1 53 close to the slider 2 54, and a dovetail groove is provided on the vertical side wall of the slider 2 54 for the dovetail head to slide up and down. The dovetail head and the dovetail groove slide in cooperation in the vertical direction to ensure the vertical stability of the slider 1 53 when it moves.

[0059] It should be noted that a roller sleeve that can rotate relative to the sliding pin 531 can be installed on the outside of the sliding pin 531, and the outer diameter of the roller sleeve can be slightly smaller than the inner diameter of the inclined hole 521, specifically one to two millimeters. The rolling contact can reduce the relative friction during contact and reduce unnecessary wear.

[0060] In a further embodiment, in order to ensure that the material tube 8 is centered after being clamped, refer to Figure 4 A clamping block 551 is provided at the same height as the liner 55, the cutter head 35 and the cutter head 36, respectively. A clamping block 541 is provided at the position of the slider 54 facing the two clamping blocks 551. A groove is provided in the middle of the clamping block 541 and the clamping block 551. The groove adopts a "<"-shaped structure. When clamping front and back, the inclined upper and lower slopes of the groove can limit the material tube 8 to a fixed height, thereby ensuring the height accuracy after clamping and aligning with the central axis of the cutter head 35 and the cutter head 36.

[0061] In a further embodiment, in order to adapt to the material tube 8 of different outer diameters, refer to Figure 5 The clamp block 2 551 is locked by bolts. After loosening the bolts, the clamp block 2 551 can be adjusted forward and backward. A ruler plate 552 is provided at the position of the liner 55 corresponding to the clamp block 2 551. The actual adjustment distance is determined by the ruler plate 552. The actual distance is equal to half of the difference between the actual outer diameter of the material tube 8 and the standard outer diameter. The other half of the difference is compensated by the clamp block 1 541 to ensure that the center axis of the material tube 8 can be centered when clamping, and the center axis of the material tube 8 will not be moved forward or backward due to the change of the outer diameter. It is ensured that the material tubes 8 with different outer diameters can be aligned with the center axes of the cutter head 1 35 and the cutter head 2 36 in the front and rear directions after clamping.

[0062] In a further embodiment, how the clamp block 541 compensates for the outer diameter difference of the material tube 8 is described in detail. Figure 5 The feeding assembly 5 also includes a servo electric cylinder 51 and a slide 56. The servo electric cylinder 51 can control the extended length according to the material tubes 8 of different outer diameters. The extended length can be pre-set to compensate for the different diameters of the material tubes 8. At the same time, after adjustment, it can ensure that the clamping force of the material tubes 8 of different outer diameters is consistent. The servo electric cylinder 51 is horizontally arranged and provides a driving force for the translation of the slider 2 54. The bottom end of the slider 2 54 is slidably engaged with the slide 56 in the horizontal direction to ensure that the slider 2 54 is directly opposite to the clamp 1 541 front and back to prevent the left and right misalignment from causing the material tube 8 to be subjected to unbalanced force and torsional deformation, which is suitable for the clamping scenario of thin-walled tubes.

[0063] In a further embodiment, a specific configuration of a workbench 2 is provided, referring to Figure 2 The workbench 2 includes a movable table 21 and a fixed table 23. The fixed table 23 is fixedly connected to the base 1. The movable table 21 is fixed. A driver 22 is installed between the fixed table 23 and the movable table 21. The driver 22 can be a screw slide, a hydraulic cylinder, or a motor with a roller. The driver 22 can drive the movable table 21 to approach the fixed table 23. You can choose according to the usage scenario to adjust the size of the middle material transfer space of the entire equipment to adapt to different lengths of the material tube 8. Refer to Fig.12The length of the material transfer space is greater than the length of the material pipe 8 but less than the diagonal length of the material pipe 8, which can also ensure that the material pipe 8 is arranged neatly and will not twist when falling.

[0064] The working principle of this embodiment is as follows:

[0065] Reference Figure 8 - Fig.10 Before chamfering, place the material tube 8 between the two feeding rails 6. The feeding rails 6 are higher at the back and lower at the front. Gravity can be used to roll the material tube 8 forward, and the material tube 8 is provided to the milling assembly 3 one by one.

[0066] When feeding, the material pipe 8 at the bottom will be blocked by the slider 2 54 of the feeding assembly 5. As the slider 2 54 moves backward, Fig.12 , all the material tubes 8 will be pushed upwards to align, ensuring that the material tubes 8 are in a horizontal state, avoiding the material tubes 8 from twisting and causing the friction between the end faces and the vertical side walls of the loading rail 6, causing the material tubes 8 to be stuck in the loading rail 6. During the backward movement of the slider 2 54, the slider 1 53 will gradually rise until the lowest material tube 8 is pushed up and over the position of the slider 2 54, thus completing the loading action of a single material tube 8;

[0067] During positioning, the material tube 8 falls from top to bottom into the milling channel 46 between the two end frames 41. The buffer plate 413 prevents the material tube 8 from bouncing and jamming the material. The material tube 8 slides downward along the milling channel 46, and then is supported by the support rod 1 47 and limited to the same height as the cutter head 1 35, completing the positioning in the up-down direction. Finally, the slider 2 54 moved to the rear stop point moves forward and approaches the liner 55 to clamp the material tube 8 entering the milling channel 46, completing the positioning in the front-back direction.

[0068] During chamfering, the material tube 8 is positioned in the feeding direction of the cutter head 35, the cutter head 35 is horizontally close to the end face of the material tube 8, the cutter head 35 is rotated to chamfer the inner edge of the material tube 8, and the chip discharge groove of the cutter head 35 is used to guide the generated chips to the processing hole 411 and discharge them to the outside of the milling channel 46 to avoid affecting the blanking and the chamfering process below;

[0069] When changing positions, the cutter head 35 moves horizontally away from the material tube 8, the slider 2 54 moves backward, the chamfered material tube 8 is relaxed, the support rod 1 47 is shortened, so that the material tube 8 moves downward along the milling channel 46 and is finally supported by the support rod 2 48 to reach the same height position as the cutter head 36. During the process, the buffer plate 413 delays the fall of one end of the material tube 8 to make the material tube 8 tilt, and cooperates with the impact of the support rod 2 48 to discharge the debris in the material tube 8, the support rod 1 47 is extended and reset, and the backward movement of the slider 2 54 will cooperate with the slider 1 53 to push a new material tube 8 into the milling channel 46 again, and it will be supported by the re-extended support rod 1 47 and stay at the position of the cutter head 35;

[0070] When chamfering again, the cutter head 1 35 and the cutter head 2 36 of the milling assembly 3 are translated simultaneously, and approach the two fixed material tubes 8 respectively, the cutter head 1 35 performs an inner chamfering operation on the upper material tube 8, and the cutter head 2 36 performs an outer chamfering operation on the lower material tube 8;

[0071] When changing positions again, the cutter head 35 and the cutter head 2 36 are translated away from the material tube 8, the slider 2 54 moves backward to loosen the chamfered material tube 8, the strut 2 48 is shortened to release the lower material tube 8, and then the strut 2 48 is extended and reset. The released material tube 8 is guided forward by the unloading rail 7 and collected, and the strut 1 47 is shortened so that the upper material tube 8 moves downward and is positioned at the same height as the cutter head 2 36 by the strut 2 48, and then the strut 1 47 is extended and reset before the slider 1 53 pushes a new material tube 8 into the milling channel 46 again, completing continuous loading, chamfering, changing positions and unloading.

[0072] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention.

Claims

1. A metal casing inner and outer end surface chamfering machine, comprising a base (1), characterized in that: Also includes: A workbench (2) is fixed on the top surface of the base (1), and two inclined loading rails (6) are installed on the workbench (2); A milling assembly (3) located at the unloading position of the loading rail (6), the milling assembly (3) comprising a cutter head 1 (35) and a cutter head 2 (36), the cutter head 1 (35) being capable of chamfering the inner edge of the material tube (8), and the cutter head 2 (36) being capable of chamfering the outer edge of the material tube (8); A positioning assembly (4) located at the milling position of the milling assembly (3), the positioning assembly (4) comprising two end frames (41), vertical outer walls on opposite sides of the two end frames (41) are provided with milling channels (46) for allowing the material pipe (8) to pass through the center axis position of the first cutter head (35) and the center axis position of the second cutter head (36) in sequence, and the end frame (41) is provided with a first support rod (47) and a second support rod (48) on the side where the milling channel (46) is opened; A material feeding assembly (5) is located between the two positioning assemblies (4), and the material feeding assembly (5) includes a slider 1 (53) and a slider 2 (54). The top of the slider 2 (54) is higher than the bottom edge of the loading rail (6). The slider 2 (54) can drive the slider 1 (53) to translate synchronously in the process of translating away from the liner (55) and cooperate with the limit frame (52) to push the slider 1 (53) upward. The slider 2 (54) can translate close to the liner (55) to clamp the material pipe (8) entering the milling channel (46) at the center line position of the milling channel (46).

2. The metal casing inner and outer end surface chamfering machine according to claim 1, characterized in that: The milling assembly (3) comprises a power source (31) and a housing (32); the power source (31) drives a cutter head 1 (35) and a cutter head 2 (36) to rotate via a transmission shaft (33); the transmission shaft (33) can translate in the middle of the housing (32) to bring the cutter head 1 (35) and the cutter head 2 (36) closer to the material pipe (8); the transmission shaft (33) provides a translation driving force via a telescopic rod (34); a limit rod (37) is installed between the telescopic rod (34) and the housing (32).

3. The metal casing inner and outer end surface chamfering machine according to claim 1, characterized in that: The positioning assembly (4) further comprises a receiving channel (45), wherein the receiving channel (45) is located at the top opening of the milling channel (46), and the top diameter of the receiving channel (45) gradually increases. The end frame (41) is provided with a position detection component 1 (42), a position detection component 2 (43) and a position detection component 3 (44) corresponding to the receiving channel (45), the cutter head 1 (35) and the cutter head 2 (36) respectively.

4. The metal casing inner and outer end surface chamfering machine according to claim 3, characterized in that: The milling channel (46) is narrow at the top and wide at the bottom. The end frame (41) is provided with a first processing hole (411) at a position opposite to the first cutter head (35). The end frame (41) is provided with a second processing hole (412) at a position opposite to the second cutter head (36). One of the end frames (41) is provided with a buffer plate (413) at the material-facing side of the milling channel (46).

5. The metal casing inner and outer end surface chamfering machine according to claim 4, characterized in that: The positioning assembly (4) further comprises two wedge blocks (49), the two wedge blocks (49) being respectively arranged at the processing hole one (411) and the processing hole two (412), the wedge blocks (49) being detachably fixed by a connecting plate (491), a buckle (493) being provided in the middle part of the connecting plate (491), a clamping seat (492) being detachably provided on the outer side of the buckle (493), and the clamping seat (492) being capable of driving the wedge blocks (499) out of the range of the processing hole one (411) and the processing hole two (412).

6. The metal casing inner and outer end surface chamfering machine according to claim 1, characterized in that: The limit frame (52) is provided with an inclined hole (521) with an angle consistent with that of the loading rail (6); a sliding pin (531) is fixedly installed at the lower part of the slider (53); the sliding pin (531) slides in contact with the inner wall of the inclined hole (521); a dovetail head is provided on the side of the slider (53) close to the slider (54); and a dovetail groove is provided on the vertical side wall of the slider (54) for the dovetail head to slide up and down.

7. The metal casing inner and outer end surface chamfering machine according to claim 6, characterized in that: The liner (55) is provided with a second clamping block (551) at the same height as the cutter head (35) and the cutter head (36), and the slider (54) is provided with a first clamping block (541) at a position directly opposite to the two second clamping blocks (551), and grooves are provided in the middle of the first clamping block (541) and the second clamping block (551).

8. The metal casing inner and outer end surface chamfering machine according to claim 7, characterized in that: The second clamping block (551) can be translated forward and backward to adjust the distance between it and the first clamping block (541), and the liner (55) is provided with a ruler (552) at the position corresponding to the second clamping block (551).

9. The metal casing inner and outer end surface chamfering machine according to claim 8, characterized in that: The feeding assembly (5) further comprises a servo electric cylinder (51) and a slide seat (56). The servo electric cylinder (51) is arranged horizontally and provides a driving force for the translation of the second slide block (54). The bottom end of the second slide block (54) is slidably engaged with the slide seat (56) in a horizontal direction.

10. The metal casing inner and outer end surface chamfering machine according to claim 1, characterized in that: The workbench (2) comprises a movable table (21) and a fixed table (23); the fixed table (23) is fixedly connected to the base (1); a driver (22) is installed between the fixed table (23) and the movable table (21); and the driver (22) is capable of driving the movable table (21) to approach the fixed table (23).

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