Outer clamping lathe clamp device for achieving lathe function of machining center

Abstract

The utility model discloses an outer clamping lathe clamp device for achieving the lathe function of a machining center. Comprising an oil cylinder driving mechanism, a pull rod loosening mechanism, a tool apron mechanism and an outer vehicle product clamping tool. The oil cylinder driving mechanism is installed at the top of the pull rod loosening mechanism and used for pressing the pull rod loosening mechanism downwards, the outer clamping and turning product tool is installed at the bottom end of the pull rod loosening mechanism, a product is externally clamped, supported and fixed by the outer clamping and turning product tool, the tool apron mechanism is located below the outer clamping and turning product tool, cutters are arranged in the tool apron mechanism, and the cutters face the lower portion and the side of the product respectively. The utility model designs the device for realizing the turning function of the machining center, so that the efficiency can be improved, and the cost can also be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of realizing part lathe processing by a machining center machine tool, in particular to the design of an external clamping fixture device for realizing the lathe function of a machining center. Background Art

[0002] In daily product manufacturing, especially for parts with hole systems, machining centers are often used. The main reason is that machining centers can accommodate a wide variety of tools, allowing a single device to perform a wide range of processing combinations, thereby reducing costs and improving product quality and performance. However, due to the volatile market, if a batch of parts such as wheels, discs, and shafts is needed, using traditional machining centers is not as economical and efficient as lathes, and purchasing new equipment is not cost-effective. In addition, with a little program optimization, this mechanism can achieve automatic loading and unloading. Utility Model Content

[0003] In order to solve the problems existing in the background technology, the technical problem to be solved by the present invention is to provide a machining center to realize lathe processing technology, and proposes an external clamping lathe fixture device for the machining center to realize the lathe function.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The utility model includes a cylinder drive mechanism, a loose rod mechanism, a tool holder mechanism and an external clamping lathe product tooling; the cylinder drive mechanism is installed on the top of the loose rod mechanism to press down the loose rod mechanism, the external clamping lathe product tooling is installed at the bottom of the loose rod mechanism, the product is supported and fixed by the external clamping lathe product tooling, the tool holder mechanism is located below the external clamping lathe product tooling, and a tool is provided in the tool holder mechanism, and the tool is respectively facing downward and to the side of the product.

[0006] The oil cylinder driving mechanism includes a hydraulic cylinder support, an oil cylinder body, a piston and a piston rod; the hydraulic cylinder support is fixed on the loosening rod mechanism, the oil cylinder body is installed on the top surface of the hydraulic cylinder support, the piston and the piston rod are installed in the oil cylinder body, the upper ends of the piston and the piston rod are fixedly connected, the piston can be movably sleeved in the oil cylinder body and is sealed with the inner wall of the cylinder, the lower end of the piston rod is sealed and movable through the top cover of the hydraulic cylinder support and extends into the hydraulic cylinder support, the lower end of the piston rod is fixedly sleeved with a pressure head, and the pressure head is used to press the upper end of the loosening rod mechanism.

[0007] The piston divides the oil cylinder body into two upper and lower chambers. The upper chamber is provided with an upper oil inlet pipe for oil inlet and oil return, and the lower chamber is provided with a lower oil inlet pipe for oil inlet and oil return.

[0008] The loosening rod mechanism includes a spindle body, a machining center spindle, a loosening rod, a butterfly spring, a loosening rod pressure cap, a synchronous pulley and a spindle motor; the machining center spindle is movably mounted inside the spindle body, and the upper end of the machining center spindle is connected to the output shaft of the spindle motor through a synchronous pulley; the machining center spindle is provided with a stepped center through hole that is larger at the top and smaller at the bottom, and a loosening rod is mounted in the stepped center through hole, and the upper end of the loosening rod extends out of the stepped center through hole of the machining center spindle and is fixedly connected to the loosening rod pressure cap; a butterfly spring is mounted outside the middle part of the loosening rod below the loosening rod pressure cap, and the upper and lower ends of the butterfly spring are elastically connected to the lower end face of the loosening rod pressure cap and the middle step of the stepped center through hole of the machining center spindle through gaskets.

[0009] The tool holder mechanism includes a workbench, a first tool holder, a first tool, a second tool holder, a second tool and a third tool; the workbench is located below the external clamping lathe product tooling, the first tool is installed on the workbench through the first tool holder and is located on the lower side of the external clamping lathe product tooling and the product, and the second tool and the third tool are both installed on the workbench through the second tool holder and are located on the horizontal side of the external clamping lathe product tooling and the product.

[0010] The external clamping lathe product tooling includes a tapered handle flange, a square key, a tensioning block, an adjustment locking bolt, a clamp body, an outer protective ring, an adjustment screw, a clamping claw body and a clamping claw body pin; the tapered handle flange is fixed to the bottom end of the loosening rod mechanism by bolts and square keys, the clamp body is fixed to the bottom end surface of the tapered handle flange, the outer protective ring is fixed to the lower end and outer periphery of the clamp body, and the inner part of the outer protective ring is surrounded by a cavity for mounting the clamping claw body, the tensioning block and the adjustment locking bolt; the tensioning block is adjustably fixed to the loosening and pulling rod mechanism by adjusting the locking bolt The bottom end face of the rod; a plurality of clamping jaws are arranged at intervals along the circumference on the outer ring side inside the cavity, the middle part of each clamping jaw is hingedly installed on the outer protective ring through a clamping jaw pin, the outer side of the upper end of each clamping jaw is connected to the inner wall of the outer protective ring through a sliding spring assembly, the inner side of the upper end of each clamping jaw is connected to the tightening block, and the lower end of each clamping jaw extends out of the bottom end of the outer protective ring and clamps the outer peripheral surface of the product; the outer peripheral surface of the tightening block is conical, and the conical surface of the tightening block is used to push the upper end of each clamping jaw outward so that the lower end of each clamping jaw is closed inward to clamp the product externally.

[0011] The sliding sleeve spring assembly includes a clamping jaw body bolt, an opening sliding sleeve and a sliding sleeve spring. The clamping jaw body bolt is fixed to the inner wall of the outer protective ring and arranged radially inward. The inner end of the clamping jaw body bolt is elastically sleeved in the opening sliding sleeve through the sliding sleeve spring, and the opening sliding sleeve is connected to the upper end of the clamping jaw body.

[0012] A product adjustment and positioning block for cooperating and positioning with the center of the top surface of the product is fixed at the bottom end of the outer protective ring.

[0013] A replaceable clamping block for frictionally contacting the outer peripheral surface of the product is fixed on the lower end of each clamping jaw body extending out from the bottom end of the outer protective ring.

[0014] When the tightening block is adjusted to move up and tighten relative to the bottom end surface of the loose pull rod by adjusting the locking bolt, the conical surface of the tightening block moves up radially outward to push the upper ends of each clamping jaw body further outward and the lower ends of each clamping jaw body close more inward, thereby achieving enhanced clamping of the product.

[0015] The beneficial effects of the utility model are:

[0016] The utility model designs a device for realizing the turning function of a machining center, expands the application range of the machining center, makes the machining more flexible, saves machining costs, changes the machining method from milling to turning, shortens the turning path, and improves efficiency. This method easily realizes automatic loading and unloading of the spindle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a main cross-sectional view of the structure of the utility model;

[0018] Figure 2 This is a main sectional view of the oil cylinder drive mechanism of the utility model;

[0019] Figure 3 This is a main cross-sectional view of the loosening and pulling rod mechanism of the utility model;

[0020] Figure 4 This is a main cross-sectional view of the tooling of the external clamping car product of the utility model;

[0021] Figure 5 This is a side sectional view of the structure of the present utility model;

[0022] Figure 6 yes Figure 4 CC view;

[0023] Figure 7 This is a main sectional view of the tool holder mechanism of the present utility model;

[0024] Figure 8 It is a tool path diagram.

[0025] In the picture:

[0026] Cylinder drive mechanism 1: hydraulic cylinder support 11, cylinder body 12, piston 13, piston rod 14, upper oil inlet pipe 15, lower oil inlet pipe 16, pressure head 17;

[0027] Loosening rod mechanism 2: spindle body 21, machining center spindle 22, loosening rod 23, butterfly spring 24, loosening rod pressure cap 25, synchronous pulley 26, spindle motor 27;

[0028] Tool holder mechanism 3: workbench 31, first tool holder 32, first tool 33, second tool holder 34, second tool 35, third tool 36;

[0029] External clamping lathe product tooling 4: tapered shank flange 41, square key 42, tensioning block 43, adjustment locking bolt 44, clamp body 45, outer protective ring 46, adjustment screw 47, clamping jaw body 48, clamping jaw body pin 49, replaceable clamping block 50, product adjustment positioning block 51, opening sliding sleeve 52, sliding sleeve spring 53;

[0030] Product 5. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] like Figure 1 and Figure 5 As shown, the device includes a cylinder drive mechanism 1 for realizing product loading and unloading, an adjustable loosening rod mechanism 2, a tool holder mechanism 3 for product processing and an external clamping product tooling 4 for positioning and centering functions; the cylinder drive mechanism 1 is installed on the top of the loosening rod mechanism 2 to press down the machining center spindle 22 of the loosening rod mechanism 2, and the external clamping product tooling 4 is installed at the bottom end of the loosening rod mechanism 2. The product 5 is fixed by the external clamping support of the external clamping product tooling 4, and the external clamping product tooling 4 is loaded into the inner ring of the product 5. The tool holder mechanism 3 is located below the external clamping product tooling 4. The tool holder mechanism 3 is provided with a tool, and the tool is respectively facing the bottom and side of the product 5.

[0034] The utility model device changes the machining center from a tool rotating and product moving processing mode to a product rotating and tool moving processing mode. In addition, this method facilitates automatic loading and unloading of products, realizing fully automated and unmanned processing.

[0035] The product 5 to which this utility model is applicable is a disc (ring) type part, such as a brake disc, a wheel hub, etc.

[0036] like Figure 2As shown, the cylinder drive mechanism 1 includes a hydraulic cylinder support 11, a cylinder body 12, a piston 13 and a piston rod 14; the hydraulic cylinder support 11 is fixed on the main shaft body 21 of the loosening rod mechanism 2 by bolts, the cylinder body 12 is installed on the top surface of the hydraulic cylinder support 11, and the piston 13 and the piston rod 14 are installed in the cylinder body of the cylinder body 12. The upper ends of the piston 13 and the piston rod 14 are fixedly connected. At the same time, a sealing ring is provided at the connecting surface between the piston 13 and the upper ends of the piston rod 14. The piston 13 can be movably mounted in the cylinder body of the cylinder body 12 and is sealed to the inner wall of the cylinder body through the sealing ring. The lower end of the piston rod 14 is sealed and movable through the top cover of the hydraulic cylinder support 11 through the sealing ring and extends into the hydraulic cylinder support 11. The lower end of the piston rod 14 is fixedly mounted with a pressure head 17, which is used to press the upper end of the loosening rod 23 of the loosening rod mechanism 2.

[0037] The piston rod pressure head 17 of the oil cylinder drive mechanism for loading and unloading products can be replaced and adjusted according to actual requirements, thereby improving efficiency and making replacement convenient.

[0038] The piston 13 divides the oil cylinder body 12 into two chambers, the upper chamber is provided with an upper oil inlet pipe 15 for oil inlet and return at the top cover of the oil cylinder body 12, and the lower chamber is provided with a lower oil inlet pipe 16 for oil inlet and return at the side wall of the oil cylinder body 12.

[0039] When oil flows into the upper oil inlet pipe 15 and returns to the lower oil inlet pipe 16, the piston 13 and the piston rod 14 move downward as a whole, thereby driving the pressure head 17 to press against the loosening rod pressure cap 25 of the loosening rod mechanism 2 and transmit the pressure to the loosening rod 23;

[0040] When the upper oil inlet pipe 15 returns oil and the lower oil inlet pipe 16 takes oil, the piston 13 and the piston rod 14 move upward as a whole, thereby driving the pressure head 17 away from the loosening rod pressure cap 25 and the loosening rod 23 of the loosening rod mechanism 2.

[0041] like Figure 3 As shown, the loosening rod mechanism 2 includes a spindle body 21, a machining center spindle 22, a loosening rod 23, a butterfly spring 24, a loosening rod pressure cap 25, a synchronous pulley 26, and a spindle motor 27;

[0042] The spindle body 21 remains fixed, and the spindle body 21 is movably sleeved with the machining center spindle 22. The upper end of the machining center spindle 22 is connected to the output shaft of the spindle motor 27 through a synchronous pulley 26; Figure 5 As shown, the spindle motor 27 rotates through the synchronous pulley 26 to drive the machining center spindle 22 and the external clamping product fixture 4 fixed at its lower end, thereby driving the external clamping product fixture 4 and the product 5 to rotate at high speed. The diameter of the synchronous pulley 26 is larger than the diameter of the hole through which the machining center spindle 22 passes through the spindle body 21.

[0043] The machining center spindle 22 is provided with a stepped center through hole which is larger at the top and smaller at the bottom. A loose rod 23 is synchronously mounted in the stepped center through hole. The upper end of the loose rod 23 extends out of the stepped center through hole of the machining center spindle 22 and is connected to the loose rod pressure cap 25 through a bolt thread. The loose rod pressure cap is screwed onto the thread on the upper end of the loose rod.

[0044] A butterfly spring 24 is sheathed on the middle part of the loose rod 23 below the loose rod pressure cap 25. The upper and lower ends of the butterfly spring 24 are elastically connected to the lower end face of the loose rod pressure cap 25 and the middle step between the upper larger and lower smaller stepped center through hole of the machining center spindle 22 through gaskets.

[0045] Specifically, the stepped center through hole of the machining center spindle 22 is provided with an intermediate step between the upper large end and the lower small end, a gasket is provided on the intermediate step of the machining center spindle 22, and a gasket is provided on the lower end surface of the loose rod pressure cap 25.

[0046] In the loosening rod mechanism 2, the loosening rod pressure cap 25 is pressed down by the pressure head 17 of the cylinder drive mechanism 1, and then the butterfly spring 24 pushes the machining center spindle 22 and the loosening rod 23 to move downward together, thereby driving the external clamping lathe product tooling 4 and the product 5 to move downward.

[0047] In practice, the butterfly spring 24 is composed of multiple butterfly springs stacked together, and the clamping force can be adjusted according to the number of adjustable butterfly springs. The adjustment and loosening rod mechanism can increase or decrease the tension of the butterfly spring according to the size of the turning force, adjust the preload of the butterfly spring, and adjust the tension distance.

[0048] like Figure 7 As shown, the tool holder mechanism 3 includes a workbench 31, a first tool holder 32, a first tool 33, a second tool holder 34, a second tool 35 and a third tool 36; the workbench 31 is located below the external clamping lathe product tooling 4, the first tool 33 is installed on the workbench 31 through the first tool holder 32 and is located on the lower side of the external clamping lathe product tooling 4 and the product 5, the second tool 35 and the third tool 36 are both installed on the workbench 31 through the second tool holder 34 and are located on the horizontal side of the external clamping lathe product tooling 4 and the product 5.

[0049] The first tool 33 is used to perform cutting processing on relevant parts of the product when the product 5 is driven to rotate at high speed. If necessary, additional tools can be added to facilitate rough and fine processing.

[0050] The second tool 35 and the third tool 36 are used to perform cutting processing simultaneously on the upper and lower parts of the product 5 when the product 5 is driven to rotate at high speed, so as to ensure the geometric accuracy of the relevant parts of the product.

[0051] In practice, the first and second tool holders 32, 34 are mounted in the T-slots of the workbench 31 via bolts and sliders, allowing for horizontal movement and adjustment of their positions. This facilitates easy adjustment and replacement. This allows for adjustable tool fixation to the workbench, facilitating easy maintenance and replacement, and facilitating the production of complex tools and enabling dual-tool machining.

[0052] The external clamping tool 4 utilizes the principle of tapered expansion of the outer sleeve combined with lever clamping. A short taper shank is used for centering, making it easy to align and requiring no adjustment during use. The internal expansion tool 4 not only positions the taper but also positions the plane, and uses a square key for torque transmission.

[0053] like Figure 4 and Figure 6 As shown, the external clamping lathe product tooling 4 includes a tapered shank flange 41, a square key 42, a tensioning block 43, an adjustment locking bolt 44, a clamp body 45, an outer protective ring 46, an adjustment screw 47, a clamp body 48 and a clamp body pin 49;

[0054] The tapered shank flange 41 is fixed to the bottom end of the machining center spindle 22 of the loosening and pulling rod mechanism 2 by bolts and a square key 42. The clamp body 45 is fixed to the bottom end surface of the tapered shank flange 41 by bolts. The outer protective ring 46 is fixed to the lower end and outer periphery of the clamp body 45 by bolt sleeves. The inner part of the outer protective ring 46 encloses a cavity for mounting the clamping jaw body 48, the tensioning block 43 and the adjustment locking bolt 44;

[0055] The tensioning block 43 is adjustably fixed to the bottom end surface of the loosening rod 23 of the loosening rod mechanism 2 by adjusting the locking bolt 44;

[0056] A plurality of clamping jaws 48 are arranged at intervals along the circumference of the outer ring side of the cavity. In a specific implementation, six clamping jaws 48 can be arranged. Figure 6 As shown, the middle portion of each clamping jaw 48 is hingedly mounted on the outer protective ring 46 via a clamping jaw pin 49. The outer side of the upper end of each clamping jaw 48 is connected to the inner wall of the outer protective ring 46 via a sliding spring assembly. The inner side of the upper end of each clamping jaw 48 is in contact with the tensioning block 43. The lower end of each clamping jaw 48 extends beyond the bottom end of the outer protective ring 46 and clamps the outer circumference of the product 5.

[0057] The outer peripheral surface of the tightening block 43 is conical, and the conical surface of the tightening block 43 is used to push the upper ends of each clamping claw body 48 outward so as to close the lower ends of each clamping claw body 48 inward to clamp the product 5 externally.

[0058] In a specific implementation, the clamping jaw body 48 is V-shaped with an obtuse angle.

[0059] The sleeve spring assembly includes a clamping jaw body bolt, an opening sleeve 52 and a sleeve spring 53. The outer end of the clamping jaw body bolt is fixed to the inner wall of the outer protective ring 46 and arranged radially inward. The inner end of the clamping jaw body bolt is elastically sleeved in the opening sleeve 52 through the sleeve spring 53. The opening sleeve 52 is connected to the outer side of the upper end of the clamping jaw body 48, so that the upper end of the clamping jaw body 48 is elastically connected to the inner wall of the outer protective ring 46 through the opening sleeve 52 and the sleeve spring 53.

[0060] A product adjustment and positioning block 51 for cooperating and positioning with the center of the top surface of the product 5 is fixed to the bottom end of the outer protective ring 46 .

[0061] A replaceable clamping block 50 for frictionally contacting the outer peripheral surface of the product 5 is fixed on the lower end of each clamping jaw body 48 extending out from the bottom end of the outer protective ring 46 .

[0062] When the tightening block 43 is adjusted to move up and tighten relative to the bottom end surface of the loose rod 23 by adjusting the locking bolt 44, the conical surface of the tightening block 43 moves up radially outward to push the upper ends of each clamping jaw body 48 further outward and the lower ends of each clamping jaw body 48 are closed more inward, thereby achieving enhanced clamping of the product 5.

[0063] When the tightening block 43 is adjusted to move downward and loosen relative to the bottom end surface of the loosening rod 23 by adjusting the locking bolt 44, the conical surface of the tightening block 43 moves downward radially inward away from the upper end of each clamping claw body 48, so that the lower end of each clamping claw body 48 opens more inward, thereby weakening the clamping of the product 5.

[0064] This utility model incorporates an external protective ring 46 within the external clamping fixture 4 to protect the clamp body, ensuring safety, preventing chipping, and reducing wear. An internal tensioning block 43 is also provided for adjustment and locking, allowing for fine-tuning of the clamping force without adjusting the disc spring. The clamping block 50, which contacts the product and acts as a replaceable pressure block, can be replaced, extending the life of the clamp body and facilitating product replacement.

[0065] External clamping lathe product tooling 4 with positioning and centering function:

[0066] The tapered shank flange 41 has a short shank taper on the top that matches the spindle taper of the machining center, playing the role of automatic centering.

[0067] The square key 42 is located between the end of the spindle 22 of the machining center and the tapered tool holder flange 41. It mainly plays the role of transmitting torque, that is, through it, the force of the spindle motor 27 is transmitted to the tapered tool holder flange 41;

[0068] The tensioning block 43 and the clamping jaw 48 form the external clamping structure. Their primary function is to utilize tension, combined with the leverage of the clamping jaw 48, to amplify and secure the product during processing. The tension needs to be adjusted based on the cutting forces and the desired deformation during clamping. This tension is determined by adjusting the number of butterfly springs 24. The design here is based on 100 butterfly springs. If product deformation occurs, the number of butterfly springs 24 should be reduced and the number or thickness of the shims above and below the butterfly springs should be increased.

[0069] Adjust the locking bolt 44. Its main function is to lock the tension block 43 when the tension block 43 needs to be adjusted up or down to prevent the tension block 43 and the loose pull rod 23 from loosening and affecting the tensioning force.

[0070] In the loose rod mechanism:

[0071] The loose pull rod 23 is actually a threaded rod with two ends inserted in the center of the main shaft, which is convenient for disassembly and replacement. Its main function is to connect the tensioning block 43 and tighten the tensioning block.

[0072] Flat washers are installed at both the upper and lower ends of the butterfly spring 24. These wear-resistant circular washers primarily serve to eliminate the impact of the outer rounded corners at the bottom of the spindle's inner bore and protect the bottom plane of the spindle's inner bore, preventing the butterfly spring 24 from deforming and scratching the bottom surface. Like ordinary springs, the butterfly spring 24 provides power to the outer clamping shaft, effectively clamping the product. By adjusting the number of butterfly springs, the total tension of the product can be adjusted. By adjusting the number of butterfly springs facing each other and back-to-back, the compression amount can be adjusted, effectively adjusting the vertical movement distance of the loosening rod 23.

[0073] The loose rod pressure cap 25 is a long hexagonal nut that is screwed onto the upper thread of the loose rod to tighten the adjustment gasket, thereby giving the butterfly spring 24 an initial pre-tightening force to ensure that each butterfly spring is in good contact. When there is no product, the main shaft will not move up and down or make abnormal noises when it rotates.

[0074] In the cylinder drive mechanism:

[0075] It is a cylinder with two brackets.

[0076] The hydraulic cylinder bracket 11 is used to support the hydraulic cylinder above, and is fixed to the machine tool spindle housing using M10 bolts. Together with the piston 13 and piston rod 14, the loosening and pulling cylinder assembly is formed.

[0077] The piston rod 14 is inserted into the hole of the piston 13, and the two are locked by a round nut. The pressure head 17 is used to push the loose rod pressure cap 25. In order to ensure a reliable connection between the piston and the piston rod, and to prevent hydraulic oil from flowing through the gap between the piston and the piston rod, a sealing ring is added to the piston and the pressure head.

[0078] The upper oil inlet pipe 15 and the lower oil inlet pipe 16 are used to allow the hydraulic oil to enter the upper and lower chambers of the oil cylinder and return the oil, so that the hydraulic oil can push the piston to move back and forth.

[0079] The working principle of this utility model is as follows:

[0080] A. When it is necessary to clamp the product 5, the button is used to control the hydraulic oil to enter the upper oil inlet pipe 15 and then enter the upper chamber of the piston 13 in the hydraulic cylinder, pushing the piston 13 downward, thereby driving the piston rod 14 downward. The pressure head 17 installed at the front end of the piston rod will press down on the loose rod pressure cap 25 on the upper part of the loose rod 23.

[0081] When the pressing cap 21 and the loosening rod 23 move downward together, the pressing cap 21 will press the adjusting gasket, and the gasket will press the butterfly spring 24, causing the butterfly spring to be compressed and deformed. At the same time, when the loosening rod 23 moves downward, it will move the tensioning block 43 downward, thereby loosening the lower ends of each clamping jaw body 48, so that the product can be easily inserted into each clamping jaw body 48 to form an outer clamping jaw.

[0082] When hydraulic oil enters the lower oil inlet pipe 16 of the hydraulic cylinder and enters the lower cavity of the piston 13, it pushes the piston 13 upward, thereby driving the piston rod 14 upward. In this way, the pressure head 17 installed at the front end of the piston rod will be disengaged from the loose rod pressure cap 25. When there is no pressure from the pressure head, the elastic force of the butterfly spring 24 pushes the adjusting gasket to move upward, thereby pushing the loose rod pressure cap 25 to move upward, thereby driving the loose rod 23 to move upward, and the loose rod drives the tightening block 43 to move upward, thereby driving the lower ends of each clamping jaw body 48 to tighten, thereby clamping the product.

[0083] B. When the spindle motor 27 in the figure rotates, since a synchronous pulley is installed on the motor rotor shaft, the synchronous pulley is connected to the synchronous pulley 26 on the spindle through a synchronous belt, so that the power will be transmitted to the spindle synchronous pulley 26 through the belt. The spindle synchronous pulley 26 is installed on the upper end of the spindle through a synchronous pulley nut, and the power is transmitted to the spindle through the square key.

[0084] When the main shaft rotates, the main shaft torque will transmit the force to the tapered shank flange 41 through the two square keys 42. Since the clamp body 45 is fixed on the tapered shank flange 41, the power is transmitted to the clamp body 45 through the fixing bolts. Similarly, since the clamp body 45 and the outer protective ring 46 are also fixed with bolts, the torque will be transmitted to the tensioning block 43 and the clamping claw body 48, and then to the clamped product, causing the product to rotate.

[0085] C. Processing process, such as Figure 8 As shown in the figure, once the product is clamped, the Z-axis motor drives the Z-axis screw to rotate, which, through the Z-axis screw nut, drives the spindle head (also called the spindle box) to move the product up and down. When it moves to a certain position, the worktable controlled by the X and Y axes will move, thereby driving the tool on the worktable to perform cutting work. When cutting is completed, the X and Y axes control the worktable to return to the fixed position, and the spindle head returns to the fixed position to load and unload the product.

[0086] In this implementation, the tool processing path is as follows Figure 8 There is no specific order in the specific implementation, which needs to be determined by specific analysis.

[0087] In addition to the above preferred embodiments, the present invention has other implementation methods. Those skilled in the art can make various changes and modifications based on the present invention. As long as they do not depart from the spirit of the present invention, they should all fall within the scope defined in the claims of the present invention.

Claims

1. A lathe clamping device for a machining center that realizes the function of a lathe, characterized by: The invention comprises an oil cylinder driving mechanism (1), a loosening rod mechanism (2), a knife seat mechanism (3) and an external clamping lathe product tooling (4); the oil cylinder driving mechanism (1) is installed on the top of the loosening rod mechanism (2) for pressing down the loosening rod mechanism (2); the external clamping lathe product tooling (4) is installed at the bottom of the loosening rod mechanism (2); the product (5) is fixed by the external clamping lathe product tooling (4); the knife seat mechanism (3) is located below the external clamping lathe product tooling (4); a knife is provided in the knife seat mechanism (3), and the knife is respectively directed to the bottom and side of the product (5).

2. The external lathe clamping device for a machining center that realizes lathe function according to claim 1, characterized in that: The oil cylinder drive mechanism (1) comprises a hydraulic cylinder support (11), an oil cylinder body (12), a piston (13) and a piston rod (14); the hydraulic cylinder support (11) is fixed on the loosening rod mechanism (2), the oil cylinder body (12) is installed on the top surface of the hydraulic cylinder support (11), the oil cylinder body (12) is equipped with a piston (13) and a piston rod (14), the piston (13) and the upper end of the piston rod (14) are fixedly connected, the piston (13) is movably mounted in the oil cylinder body (12) and is sealed with the inner wall of the cylinder body, the lower end of the piston rod (14) is sealed and movable through the top cover of the hydraulic cylinder support (11) and then extends into the hydraulic cylinder support (11), the lower end of the piston rod (14) is fixedly mounted with a pressure head (17), and the pressure head (17) is used to press the upper end of the loosening rod mechanism (2).

3. The external lathe clamping device for a machining center realizing lathe function according to claim 2, characterized in that: The piston (13) divides the oil cylinder body (12) into upper and lower chambers. The upper chamber is provided with an upper oil inlet pipe (15) for oil inlet and oil return, and the lower chamber is provided with a lower oil inlet pipe (16) for oil inlet and oil return.

4. The external lathe clamping device for a machining center realizing lathe function according to claim 1, characterized in that: The loosening and pulling rod mechanism (2) comprises a main shaft body (21), a machining center main shaft (22), a loosening and pulling rod (23), a butterfly spring (24), a loosening and pulling rod pressure cap (25), a synchronous pulley (26) and a main shaft motor (27); the main shaft body (21) is movably sleeved with the machining center main shaft (22), and the upper end of the machining center main shaft (22) is connected to the output shaft of the main shaft motor (27) through the synchronous pulley (26); the machining center main shaft (22) is provided with a stepped upper portion and a lower portion. A center through hole is provided, and a loose rod (23) is installed in the stepped center through hole. The upper end of the loose rod (23) extends out of the stepped center through hole of the machining center spindle (22) and is fixedly connected to the loose rod pressure cap (25); a butterfly spring (24) is installed outside the middle part of the loose rod (23) below the loose rod pressure cap (25), and the upper and lower ends of the butterfly spring (24) are elastically connected to the lower end surface of the loose rod pressure cap (25) and the middle step of the stepped center through hole of the machining center spindle (22) through gaskets.

5. The external lathe clamping device for a machining center realizing lathe function according to claim 1, characterized in that: The tool holder mechanism (3) comprises a workbench (31), a first tool holder (32), a first tool (33), a second tool holder (34), a second tool (35) and a third tool (36); the workbench (31) is located below the external clamping lathe product tooling (4); the first tool (33) is mounted on the workbench (31) through the first tool holder (32) and is located below the external clamping lathe product tooling (4) and the product (5); the second tool (35) and the third tool (36) are both mounted on the workbench (31) through the second tool holder (34) and are located on the horizontal side of the external clamping lathe product tooling (4) and the product (5).

6. The external lathe clamping device for a machining center realizing lathe function according to claim 1, characterized in that: The external clamping lathe product tooling (4) includes a tapered shank flange (41), a square key (42), a tensioning block (43), an adjustment locking bolt (44), a clamp body (45), an outer protective ring (46), an adjustment screw (47), a clamping claw body (48) and a clamping claw body pin (49); the tapered shank flange (41) is fixed to the bottom end of the loosening rod mechanism (2) by bolts and square keys (42), the clamp body (45) is fixed to the bottom end surface of the tapered shank flange (41), the outer protective ring (46) is fixed to the lower end and outer periphery of the clamp body (45), and the inner part of the outer protective ring (46) forms a cavity for installing the clamping claw body (48), the tensioning block (43) and the adjustment locking bolt (44); the tensioning block (43) is adjustably fixed to the clamp body by adjusting the locking bolt (44). The bottom end face of the loosening rod (23) of the loosening rod mechanism (2); a plurality of clamping jaws (48) are arranged at intervals along the circumference on the outer ring side inside the cavity, the middle part of each clamping jaw (48) is hingedly mounted on the outer protective ring (46) through a clamping jaw pin (49), the outer side of the upper end of each clamping jaw (48) is connected to the inner wall of the outer protective ring (46) through a sliding spring assembly, the inner side of the upper end of each clamping jaw (48) is connected to the tensioning block (43), the lower end of each clamping jaw (48) extends out of the bottom end of the outer protective ring (46) and clamps the outer peripheral surface of the product (5); the outer peripheral surface of the tensioning block (43) is conical, and the conical surface of the tensioning block (43) is used to push the upper end of each clamping jaw (48) outward so that the lower end of each clamping jaw (48) is closed inward to clamp the product (5) externally.

7. The external lathe clamping device for a machining center realizing lathe function according to claim 6, characterized in that: The sliding sleeve spring assembly comprises a clamping jaw body bolt, an opening sliding sleeve (52) and a sliding sleeve spring (53). The clamping jaw body bolt is fixed to the inner wall of the outer protective ring (46) and arranged radially inward. The inner end of the clamping jaw body bolt is elastically sleeved in the opening sliding sleeve (52) through the sliding sleeve spring (53). The opening sliding sleeve (52) is connected to the upper end of the clamping jaw body (48).

8. The external lathe clamping device for a machining center realizing lathe function according to claim 6, characterized in that: A product adjustment and positioning block (51) for coordinating and positioning with the center of the top surface of the product (5) is fixed to the bottom end of the outer protective ring (46).

9. The external lathe clamping device for a machining center realizing lathe function according to claim 6, characterized in that: Each of the clamping jaws (48) is fixed with a replaceable clamping block (50) on the lower end thereof extending from the bottom end of the outer protective ring (46) for frictionally contacting the outer peripheral surface of the product (5).

10. The external lathe clamping device for a machining center realizing lathe function according to claim 1, characterized in that: When the tightening block (43) is adjusted to move upward and tighten relative to the bottom end surface of the loosening rod (23) by adjusting the locking bolt (44), the conical surface of the tightening block (43) moves upward radially outward to push the upper ends of each clamping jaw body (48) further outward, causing the lower ends of each clamping jaw body (48) to close further inward, thereby achieving enhanced clamping of the product (5).

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