High-speed precision machine tool for press-fitting metal parts

Abstract

The application belongs to the technical field of machine tool equipment, and particularly relates to a high-speed precision machine tool for metal part press-fitting; the application comprises a machine base, a press-fitting assembly, a servo downward pressing mechanism for driving the press-fitting assembly to lift and fall, and a clamping mechanism for fixing the metal part; the machine base is provided with a feeding mechanism for feeding the bearing, and the machine base is also provided with a feeding mechanism matched with the feeding mechanism; the press-fitting assembly comprises a lifting sleeve, the lower end of the lifting sleeve is fixedly connected with a fixing frame, and the lower surface of the fixing frame is fixedly connected with a pressing head; the pressing head is provided with an oil cylinder, a piston cylinder, a pressing block and a pressing sleeve and the like structure, the pressing sleeve can clamp and fix the bearing, the cooperation of the pressing block and the pressing sleeve drives the flow of hydraulic oil, so that the bearing is press-fitted on the shaft or in the shaft sleeve, and the purpose of assembling the bearing in different forms is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of machine tool equipment, in particular to a high-speed precision machine tool for metal part press fitting. BACKGROUND

[0002] When assembling the bearing, the inner ring of the bearing is fixed on the journal and rotates with the shaft, and the outer ring is fixed on the bearing seat or the machine shell to support the shaft; the design realizes tight connection through the interference fit of the inner ring and the shaft, and ensures smooth rolling and force transmission of the bearing; in the mechanical assembly technology, the bearing is pressed into the workpiece by placing the workpiece on the bearing platform and placing the bearing above the workpiece, and finally the bearing is pressed into the workpiece by the pressing block.

[0003] In the prior art, the bearing is assembled by pressing down the pressing machine, and the existing machine tool has the following disadvantages: when the bearing is pressed into the shaft or the bearing sleeve, different pressing head structures often need to be replaced, which is inconvenient; secondly, the bearing is usually positioned by manual feeding, and the assembly efficiency is low. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a high-speed precision machine tool for metal part press fitting, which can realize assembly of bearings of different forms by adopting an oil cylinder, a piston cylinder and a pressing sleeve structure, so as to solve the problems in the background art.

[0005] To achieve the above technical purposes, the specific technical solutions of the present application are as follows: the present application provides a high-speed precision machine tool for metal part press fitting, which comprises: a machine base, a press fitting assembly, a servo down pressure mechanism for driving the press fitting assembly to lift and a clamping mechanism for fixing the metal part; the machine base is provided with a feeding mechanism for feeding the bearing, and the machine base is also provided with a feeding mechanism matched with the feeding mechanism; the press fitting assembly is used for assembling the bearing into the part, and the press fitting assembly comprises a lifting sleeve, the lower end of the lifting sleeve is fixedly connected with a fixing frame, and the lower surface of the fixing frame is fixedly connected with a pressing head; the pressing head comprises an oil cylinder and a pressing sleeve, and the lower surface of the pressing sleeve is provided with a bearing groove for clamping the bearing; the oil cylinder is movably connected with a piston rod inside the oil cylinder, the lower end of the piston rod extends into the bearing groove, and the lower end of the piston rod is fixedly connected with a pressing block, and the pressing block is arranged in the bearing groove; the oil cylinder is connected with a piston cylinder on both sides, the piston cylinder is fixedly connected with the fixing frame, and the piston cylinder is movably connected with a piston column inside the piston cylinder, and the piston column is fixedly connected with the pressing sleeve.

[0006] As a preferred technical solution of the present application, the oil cylinder and the pressing sleeve are fixedly connected with a return spring.

[0007] As a preferred technical scheme of the present application, the inner wall of the bearing groove is provided with a plurality of grooves, a plurality of clamping blocks are slidingly connected to the top of the bearing groove, a first elastic member is fixedly connected between the clamping blocks and the grooves, and a clamping jaw is fixedly connected to the clamping blocks for clamping the bearing.

[0008] As a preferred technical scheme of the present application, the lower end of the lifting sleeve is provided with a pressure sensor, a pair of guide columns are fixedly connected to the fixed frame, and a guide sleeve is movably connected to the guide columns and fixedly connected to the top of the base.

[0009] As a preferred technical scheme of the present application, the feeding mechanism includes a feeding seat and a feeding pipe, the feeding pipe is fixedly installed above the feeding seat, and the feeding pipe is used for stacking the bearings.

[0010] As a preferred technical scheme of the present application, the inner wall of the hole is provided with a pair of sliding grooves, a sliding block is slidingly connected in the sliding groove, a second elastic member is fixedly connected between the sliding block and one end of the sliding groove, and a blocking frame is fixedly connected to the sliding block.

[0011] As a preferred technical scheme of the present application, the feeding mechanism includes a first moving mechanism and a sliding seat, the moving mechanism is used for moving the sliding seat, a lifting cylinder is fixedly installed on the sliding seat, a transfer seat is fixedly connected to the piston of the lifting cylinder, and the transfer seat is used for transferring the bearing into the pressing sleeve, and the transfer seat is provided with a transfer groove.

[0012] As a preferred technical scheme of the present application, the base is provided with a second moving mechanism for moving the clamping mechanism, the second moving mechanism is connected with a moving seat, and the clamping mechanism is fixedly installed on the moving seat.

[0013] As a preferred technical scheme of the present application, the clamping mechanism includes a connecting seat, a worm gear, a rotating disc, a fixed disc, and a driving motor, the connecting seat is fixedly connected with the fixed disc, the worm gear is coaxially fixedly connected with the rotating disc, the fixed disc is provided with a plurality of sliding holes, a moving block is slidingly connected in the sliding hole, and the moving block is fixedly connected with a clamping seat.

[0014] As a preferred technical scheme of the present application, the surface of the rotating disc is provided with a spiral strip for moving the moving block, and a worm is fixedly connected to the rotating shaft of the driving motor and engaged with the worm gear.

[0015] The beneficial effects of the present application are:

[0016] 1. The pressure head of the present application is provided with an oil cylinder, a piston cylinder, a pressing block, and a pressing sleeve, the pressing sleeve can clamp and fix the bearing, and the cooperation of the pressing block and the pressing sleeve drives the flow of hydraulic oil, so as to press-fit the bearing on the shaft or in the shaft sleeve, realizing the assembly of bearings in different forms.

[0017] 2、The application can automatically transfer the bearing into the pressing sleeve through the feeding mechanism and the feeding mechanism, realizes the automatic feeding of the bearing, and improves the assembly efficiency of the bearing. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the overall structure schematic diagram of the application.

[0019] Figure 2 It is the structure schematic diagram of the pressing assembly proposed by the application.

[0020] Figure 3 It is the structure schematic diagram of the pressing head proposed by the application.

[0021] Figure 4 It is the sectional view schematic diagram of the pressing head proposed by the application.

[0022] Figure 5 It is the structure schematic diagram of the clamping mechanism proposed by the application.

[0023] Figure 6 It is the structure schematic diagram of the feeding mechanism proposed by the application.

[0024] Figure 7 It is the sectional view schematic diagram of the feeding mechanism proposed by the application.

[0025] Figure 8 It is the structure schematic diagram of the feeding mechanism proposed by the application.

[0026] Corresponding name of the reference signs in the drawing is as follows: 1, machine base; 2, servo pressing mechanism; 3, pressing assembly; 31, lifting sleeve; 32, fixed frame; 33, pressing head; 331, oil cylinder; 332, pressing sleeve; 333, bearing groove; 334, clamping block; 335, clamping jaw; 336, first elastic member; 337, piston cylinder; 338, piston column; 339, piston rod; 3310, pressing block; 3311, reset spring; 3312, recess; 34, pressure sensor; 35, guide column; 36, guide sleeve; 4, feeding mechanism; 41, feeding seat; 42, feeding pipe; 43, material hole; 44, sliding groove; 45, sliding block; 46, second elastic member; 47, blocking frame; 43, material hole; 5, feeding mechanism; 51, first moving mechanism; 52, sliding seat; 53, lifting cylinder; 54, transfer seat; 55, transfer groove; 6, clamping mechanism; 61, connecting seat; 62, worm wheel; 63, rotating disc; 64, fixed disc; 65, spiral strip; 66, moving block; 67, clamping seat; 68, sliding hole; 69, driving motor; 610, worm; 7, second moving mechanism; 8, moving seat. DETAILED DESCRIPTION

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] Implementation: This embodiment discloses a high-speed precision machine tool for press-fitting metal parts, such as... Figures 1-7 As shown, it includes: a base 1, a pressing assembly 3, a servo pressing mechanism 2 for driving the pressing assembly 3 to rise and fall, and a clamping mechanism 6 for fixing metal parts; wherein, the servo pressing mechanism 2 uses a servo motor and ball screw structure to drive the pressing assembly 3 to rise and fall. Compared with the transmission hydraulic mechanism, the servo pressing mechanism 2 drives the pressing assembly 3 to move more precisely, with higher precision and faster action; a feeding mechanism 4 is installed on the base 1 for feeding bearings, and a feeding mechanism 5 that cooperates with the feeding mechanism 4 is also installed on the base 1. The feeding mechanism 4 is located at one end of the feeding mechanism 5, and the feeding mechanism 5 is used to transport the bearings at the feeding mechanism 4 into the pressing assembly 3; the pressing assembly 3 is used to assemble the bearings onto the shaft or into the bushing.

[0029] like Figures 2-4As shown, the press-fit assembly 3 comprises a lifting sleeve 31, the servo press mechanism 2 drives the lifting sleeve 31 to move up and down, the lower end of the lifting sleeve 31 is fixedly connected with a fixed frame 32, and the lower surface of the fixed frame 32 is fixedly connected with a pressure head 33; wherein the pressure head 33 comprises an oil cylinder 331 and a pressing sleeve 332, the oil cylinder 331 is arranged above the pressing sleeve 332, and the lower surface of the pressing sleeve 332 is provided with a bearing groove 333 for clamping the bearing; a piston rod 339 is movably connected in the oil cylinder 331, the lower end of the piston rod 339 extends into the bearing groove 333, and the lower end of the piston rod 339 is fixedly connected with a pressing block 3310, and the pressing block 3310 is arranged in the bearing groove 333; the two sides of the oil cylinder 331 are connected with a piston cylinder 337 in communication, the diameter of the piston cylinder 337 is smaller than that of the oil cylinder 331, the piston cylinder 337 is fixedly connected with the fixed frame 32, a piston column 338 is movably connected in the piston cylinder 337, and the piston column 338 is fixedly connected with the pressing sleeve 332; a return spring 3311 is fixedly connected between the oil cylinder 331 and the pressing sleeve 332, the return spring 3311 applies elastic force to the pressing sleeve 332, when the return spring 3311 is in a natural state, the piston rod 339 rises to the uppermost position of the oil cylinder 331, and the piston column 338 descends to the lowermost position of the piston cylinder 337; the pressing block 3310 is in contact with the top of the bearing groove 333; when the bearing needs to be press-fitted on the shaft, the bearing is clamped in the pressing sleeve 332, the inner ring of the bearing is aligned with the shaft, the pressure head 33 is lowered, and the pressing block 3310 is directly press-fitted on the shaft; when the bearing needs to be press-fitted in the shaft sleeve, the outer ring of the bearing is aligned with the shaft sleeve, the pressure head 33 is lowered, the pressing sleeve 332 is in contact with the end surface of the shaft sleeve, as the pressure head 33 descends, the pressing sleeve 332 rises, the piston column 338 is driven to rise, the hydraulic oil is pressed from the piston cylinder 337 into the oil cylinder 331, and the pressing block 3310 is driven to descend, so that the bearing is pressed into the shaft sleeve; compared with the existing pressure head, the pressure head 33 of the embodiment can clamp and fix the bearing, and can press the bearing into the shaft or the shaft sleeve, has the functions of press-fitting the bearing in two forms, and does not need to replace the pressure head.

[0030] Preferably, a plurality of grooves 3312 are arranged on the inner wall of the bearing groove 333, a plurality of clamping blocks 334 are slidably connected on the top of the bearing groove 333, a first elastic member 336 is fixedly connected between the clamping block 334 and the groove 3312, the first elastic member 336 is a spring, a clamping jaw 335 is fixedly connected on the clamping block 334, and the clamping jaw 335 is used for clamping the bearing, and a chamfer structure is arranged on the end of the clamping jaw 335, so as to facilitate the bearing to be pressed into the bearing groove 333, and the first elastic member 336 is used for clamping the bearing through the elastic force of the clamping jaw 335.

[0031] Preferably, a pressure sensor 34 is arranged on the lower end of the lifting sleeve 31, so as to record the pressure curve; a pair of guide columns 35 are fixedly connected on the fixed frame 32, a guide sleeve 36 is movably connected on the guide column 35, and the guide sleeve 36 is fixedly connected with the top of the base 1, so that the lifting position of the fixed frame 32 is accurate.

[0032] As shown in Figure 1 And Figure 5 The second moving mechanism 7 is installed on the base 1 for driving the clamping mechanism 6 to move, the second moving mechanism 7 adopts a servo motor and a ball screw structure, the second moving mechanism 7 is connected with a moving seat 8, and the clamping mechanism 6 is fixedly installed on the moving seat 8; the clamping mechanism 6 comprises a connecting seat 61, a worm wheel 62, a rotating disc 63, a fixed disc 64 and a driving motor 69; the connecting seat 61 is fixedly connected with the fixed disc 64, the worm wheel 62 is coaxially fixedly connected with the rotating disc 63, a plurality of sliding holes 68 are formed in the fixed disc 64, a moving block 66 is slidably connected in the sliding hole 68, and a clamping seat 67 is fixedly connected on the moving block 66; a spiral strip 65 is arranged on the surface of the rotating disc 63 and used for driving the moving block 66 to move, and a worm 610 engaged with the worm wheel 62 is fixedly connected on the rotating shaft of the driving motor 69; the worm 610 is driven to rotate by the driving motor 69, the worm 610 drives the worm wheel 62 to rotate when rotating, the worm wheel 62 drives the fixed disc 64 to rotate, and then drives the plurality of moving blocks 66 to simultaneously move, so that the shaft piece or the shaft sleeve is clamped; the clamping mechanism 6 is driven to move to a position below the press-fitting assembly 3 by the second moving mechanism 7, so that the bearing is assembled.

[0033] As shown in Figures 6-7 The feeding mechanism 4 comprises a feeding seat 41 and a feeding pipe 42, and the inner wall of the feeding pipe 42 is the same in diameter as the bearing outer ring; the feeding pipe 42 is fixedly installed above the feeding seat 41, the feeding pipe 42 is used for stacking and placing the bearings, the feeding seat 41 is provided with a material hole 43 corresponding to the feeding pipe 42, the width of the material hole 43 is greater than the inner diameter of the feeding pipe 42, and the bearing is fed to the material hole 43 through the feeding pipe 42; a pair of sliding grooves 44 are arranged on the inner wall of the material hole 43, a sliding block 45 is slidably connected in the sliding groove 44, a second elastic element 46 is fixedly connected between the sliding block 45 and one end of the sliding groove 44, the second elastic element 46 adopts a spring, and a blocking frame 47 is fixedly connected on the sliding block 45, and the blocking frame 47 is used for blocking the upper layer of bearings.

[0034] As shown in Figure 8As shown, the feeding mechanism 5 includes a first moving mechanism 51 and a sliding seat 52, the first moving mechanism 51 adopts a driving structure of a servo motor and a lead screw, the first moving mechanism 51 is used to drive the sliding seat 52 to move, the sliding seat 52 is fixedly installed with a lifting cylinder 53, the lifting cylinder 53 is fixedly connected with a transfer seat 54 on the piston, and the transfer seat 54 is used to transfer the bearing into the pressing sleeve 332, the transfer seat 54 is provided with a transfer groove 55, the depth of the transfer groove 55 is less than the height of the bearing, and the bearing can be conveniently pressed into the pressing sleeve 332; when the bearing is taken out, the sliding seat 52 is driven by the first moving mechanism 51 to move, the transfer seat 54 moves into the material hole 43, the transfer seat 54 contacts the blocking frame 47 and drives the blocking frame 47 to move away, so that the last layer of bearing can fall into the transfer seat 54, and then the transfer seat 54 moves back, the blocking frame 47 moves to the original position under the elastic force of the second elastic member 46, and the bearing above is blocked; the transfer seat 54 moves to a position directly below the pressing head 33, and then the lifting cylinder 53 drives the transfer seat 54 to rise, so that the bearing is pressed into the pressing sleeve 332, the clamping jaw in the pressing sleeve 332 clamps and fixes the bearing, and the automatic feeding of the bearing is completed; in the feeding process, the second moving mechanism 7 drives the clamping mechanism 6 to move away from the pressing assembly 3, so as to avoid hindering the stroke of the transfer seat 54, when the feeding is completed, the sliding seat 52 is driven by the first moving mechanism 51 to move away, the second moving mechanism 7 drives the clamping mechanism 6 to move to a position directly below the pressing assembly 3, and the bearing is pressed and fitted.

[0035] Working principle: the parts are clamped on the clamping mechanism 6, the first moving mechanism 51 drives the transfer seat 54 to move to the feeding mechanism 4, the transfer seat 54 moves into the material hole, takes away the bearing at the lowermost layer of the feeding pipe 42, and then transfers the bearing into the pressing sleeve 332, the second moving mechanism 7 drives the clamping mechanism 6 to move to a position directly below the pressing assembly 3, the servo pressing mechanism 2 drives the pressing head 33 to descend, and the bearing is pressed and fitted on the parts; compared with the prior art, the embodiment can automatically feed the bearing, manual feeding and alignment of the bearing are not needed, the pressing and fitting efficiency of the bearing is improved, the pressing head 33 can press and assemble the bearing on the shaft or into the shaft sleeve, different forms of bearing assembly are realized, and the pressing head does not need to be replaced; in the embodiment, the servo pressing mechanism 2, the first moving mechanism 51 and the second moving mechanism 7 accurately control the movement position and movement distance of each mechanism by controlling the rotation number of the lead screw.

[0036] Finally, it should be noted that in the description of the application, it should be noted that the terms "vertical", "upper", "lower", "horizontal" and the like indicate the orientation or positional relationship shown in the drawings, and are only used for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0037] The above merely describes the preferred embodiments of the present application and is not used to limit the present application, and although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or equivalently replace some technical features thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high-speed precision machine tool for press-fitting metal parts, comprising: The machine base (1), the pressing assembly (3), the servo pressing mechanism (2) for driving the pressing assembly (3) to rise and fall, and the clamping mechanism (6) for fixing the metal parts; the machine base (1) is equipped with a feeding mechanism (4) for feeding the bearings, and the machine base (1) is also equipped with a feeding mechanism (5) that cooperates with the feeding mechanism (4). Its features are, The press assembly (3) is used to assemble the bearing into the component. The press assembly (3) includes a lifting sleeve (31), a fixed frame (32) is fixedly connected to the lower end of the lifting sleeve (31), and a press head (33) is fixedly connected to the lower surface of the fixed frame (32). The pressure head (33) includes a hydraulic cylinder (331) and a pressure sleeve (332), and the lower surface of the pressure sleeve (332) is provided with a bearing groove (333) for clamping the bearing. The hydraulic cylinder (331) is sealed and movably connected with a piston rod (339). The lower end of the piston rod (339) extends into the bearing groove (333), and a pressure block (3310) is fixedly connected to the lower end of the piston rod (339). The pressure block (3310) is located in the bearing groove (333). The hydraulic cylinder (331) is connected to piston cylinders (337) on both sides. The piston cylinder (337) is fixedly connected to the fixed frame (32). The piston cylinder (337) is sealed and movably connected to the piston column (338). The piston column (338) is fixedly connected to the pressure sleeve (332). A return spring (3311) is fixedly connected between the hydraulic cylinder (331) and the pressure sleeve (332). The bearing groove (333) has multiple grooves (3312) on its inner wall. Multiple clamping blocks (334) are slidably connected to the top of the bearing groove (333). A first elastic element (336) is fixedly connected between the clamping block (334) and the groove (3312). A clamping claw (335) is fixedly connected to the clamping block (334) for clamping the bearing.

2. The high-speed precision machine tool for press-fitting metal parts according to claim 1, characterized in that, A pressure sensor (34) is installed at the lower end of the lifting sleeve (31). A pair of guide columns (35) are fixedly connected to the fixed frame (32). A guide sleeve (36) is movably connected to the guide column (35). The guide sleeve (36) is fixedly connected to the top of the base (1).

3. A high-speed precision machine tool for press-fitting metal parts according to claim 2, characterized in that, The feeding mechanism (4) includes a feeding seat (41) and a feeding tube (42). The feeding tube (42) is fixedly installed above the feeding seat (41) and is used to stack bearings. The feeding seat (41) is provided with a material hole (43) corresponding to the feeding tube (42).

4. A high-speed precision machine tool for press-fitting metal parts according to claim 3, characterized in that, The inner wall of the material hole (43) is provided with a pair of sliding grooves (44), a slider (45) is slidably connected in the sliding groove (44), a second elastic element (46) is fixedly connected between the slider (45) and one end of the sliding groove (44), and a stop (47) is fixedly connected on the slider (45).

5. A high-speed precision machine tool for press-fitting metal parts according to claim 4, characterized in that, The feeding mechanism (5) includes a first moving mechanism (51) and a slide (52). The first moving mechanism (51) is used to drive the slide (52) to move. A lifting cylinder (53) is fixedly installed on the slide (52). A transfer seat (54) is fixedly connected to the piston of the lifting cylinder (53) for transferring the bearing to the pressure sleeve (332). The transfer seat (54) is provided with a transfer groove (55).

6. A high-speed precision machine tool for press-fitting metal parts according to claim 5, characterized in that, The base (1) is equipped with a second moving mechanism (7) for driving the clamping mechanism (6) to move. The second moving mechanism (7) is connected to a moving seat (8), and the clamping mechanism (6) is fixedly installed on the moving seat (8).

7. A high-speed precision machine tool for press-fitting metal parts according to claim 6, characterized in that, The clamping mechanism (6) includes a connecting seat (61), a worm gear (62), a rotating disk (63), a fixed disk (64), and a drive motor (69); wherein the connecting seat (61) is fixedly connected to the fixed disk (64), the worm gear (62) is coaxially fixedly connected to the rotating disk (63), the fixed disk (64) is provided with a plurality of sliding holes (68), a moving block (66) is slidably connected in the sliding hole (68), and a clamping seat (67) is fixedly connected to the moving block (66).

8. A high-speed precision machine tool for press-fitting metal parts according to claim 7, characterized in that, The rotating disk (63) has a vortex bar (65) on its surface, which is used to drive the moving block (66) to move, and a worm (610) that meshes with the worm wheel (62) is fixedly connected to the shaft of the drive motor (69).

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