Rapid machining device for double-end threaded rod

Abstract

The utility model discloses a rapid machining device for a double-end threaded rod. The rapid machining device comprises a lathe bed, a main shaft, a sliding plate and a multi-tool cutting module. A workpiece penetrates through a through hole in the multi-cutter cutting module, and four cutters on the multi-cutter cutting module are arranged around the workpiece. The multi-cutter cutting module is further provided with a synchronous transmission mechanism, two clutch mechanisms and a parallel reverse transmission mechanism. The four cutters can be used for machining the outer circle face at the same time, compared with an existing double-cutter-tower machining mode, the outer circle machining efficiency is further improved, meanwhile, the double-cutter machining mode can be achieved only by arranging one sliding plate on the lathe bed, and the double-cutter-tower lathe bed has the advantages of being low in transformation difficulty and low in cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to a threaded rod processing device. BACKGROUND

[0002] Double -end threaded rod as a kind of common mechanical transmission element, is widely used in various mechanical equipment, its structural features are with two circumferential uniform distribution spiral groove, can provide greater lead to realize fast movement.

[0003] The traditional processing mode of double -end threaded rod is to process using lathe, thickens lathe outside circle, then processes two spiral grooves in turn. Its defects are: threaded rod is slender part, thickens entire outside circle needs long time, processing efficiency is low, and workpiece is unidirectional stress when turning, prone to bending, affect processing accuracy.

[0004] In view of the above problems, the prior art further puts forward double-tool tower synchronous processing mode, it is to set up two slides on the bed body, respectively located on the both sides of workpiece, each slide is respectively equipped with one knife tower, and the outside circle or spiral groove is cut from both sides simultaneously, so as to improve the processing efficiency. However, this mode still has shortcomings: on the one hand, threaded rod is long, and a lot of time is consumed, and the efficiency needs to be improved;On the other hand, since two slides need to be equipped, it is difficult to implement the modification on ordinary lathe, and special machine tool must be redesigned, so the investment cost is high and the time is long. INVENTION CONTENTS

[0005] The utility model proposes a double -end threaded rod fast processing device, and its purpose is: 1, further improve the outside circle processing efficiency;2, reduce the difficulty of modification to ordinary lathe when applying.

[0006] The utility model technical scheme is as follows:

[0007] A double -end threaded rod fast processing device, including bed body, the bed body is equipped with main shaft, slide and tailstock, the main shaft is equipped with chuck, one end of workpiece is installed on chuck, the other end is connected with tailstock, still include the multiple -tool cutting module of installation on slide;

[0008] The multiple -tool cutting module includes base body, horizontal through -hole is equipped on the base body, workpiece passes through the through -hole;

[0009] Multiple -tool cutting module further includes four clamping tool blocks that are circumferentially distributed around the through -hole, the clamping tool blocks are slidably connected with the base body to realize movement along the radial direction of the through -hole;The inner end of the clamping tool block is used for installing the tool;Nut is also installed on the clamping tool block, and the nut is provided with a lead screw;

[0010] The multi-tool cutting module further comprises a driving motor and a synchronous transmission mechanism mounted on the base body, the input end of the synchronous transmission mechanism is in transmission connection with the driving motor, the synchronous transmission mechanism has four driving shafts as output ends, the four driving shafts correspond to the four lead screws one by one, and the driving shafts and the lead screws are both mounted on the base body in a rotary connection mode;

[0011] The driving shafts are divided into two groups, the two driving shafts in each group are oppositely arranged; the driving shafts in the first group are fixedly connected with the corresponding lead screws or are integrated, and the driving shafts in the second group are respectively in transmission connection with the corresponding lead screws through a clutch mechanism, and the two clutch mechanisms synchronously act under the driving of the telescopic cylinder;

[0012] The multi-tool cutting module further comprises a hollow shaft motor mounted on the base body, the hollow shaft motor is in transmission connection with the two lead screws corresponding to the two driving shafts in the second group through a parallel reverse transmission mechanism and two clutch mechanisms, so as to control the two lead screws corresponding to the two driving shafts in the second group to synchronously rotate in reverse;

[0013] When the clutch mechanism is located at the first station, the driving shafts in the second group control the corresponding lead screws to rotate, and when the clutch mechanism is located at the second station, the hollow shaft motor controls the two lead screws corresponding to the two driving shafts in the second group to rotate.

[0014] As a further improvement of the double-threaded rod rapid processing device: for the driving shafts in the second group, the corresponding clutch mechanisms comprise a first driving gear disc, a second driving gear disc and a double-sided gear disc;

[0015] The first driving gear disc is mounted on the end of the corresponding driving shaft, the double-sided gear disc is sleeved on the corresponding lead screw in a spline fitting mode, and the second driving gear disc is mounted on the lead screw through a bearing;

[0016] The double-sided gear disc is located between the first driving gear disc and the second driving gear disc, and end teeth are arranged on both side end faces of the double-sided gear disc, and end teeth are arranged on the side of the first driving gear disc close to the double-sided gear disc and the side of the second driving gear disc close to the double-sided gear disc.

[0017] As a further improvement of the double-threaded rod rapid processing device: the parallel reverse transmission mechanism comprises a rotating shaft mounted in the inner hole of the hollow shaft motor, and further comprises a first bearing seat, a second bearing seat and a third bearing seat mounted on the base body;

[0018] One end of the rotating shaft is provided with a first intermediate gear, the first intermediate gear is engaged with a second intermediate gear installed on a first bearing seat, and the first intermediate gear and the second intermediate gear have equal gear teeth; the second intermediate gear is fixedly connected with a first synchronous pulley, the first synchronous pulley is connected with a second synchronous pulley installed on a second bearing seat through a transmission belt, the second synchronous pulley is fixedly connected with a third synchronous pulley, and the third synchronous pulley is in transmission connection with one of the second driving gear discs through a synchronous belt;

[0019] The other end of the rotating shaft is provided with another first synchronous pulley, the another first synchronous pulley is connected with another second synchronous pulley installed on a third bearing seat through a transmission belt, the another second synchronous pulley is fixedly connected with another third synchronous pulley, and the another third synchronous pulley is in transmission connection with the other second driving gear disc through a synchronous belt.

[0020] As a further improvement of the double-threaded rod rapid machining device, the clutch mechanism further comprises a rotating sleeve installed outside the double-sided gear disc through a bearing sleeve;

[0021] The two ends of the telescopic cylinder are respectively connected with a pull rod, and the two pull rods are connected with the two rotating sleeves in a one-to-one correspondence.

[0022] As a further improvement of the double-threaded rod rapid machining device, the synchronous transmission mechanism comprises a gear ring, and further comprises four groups of third intermediate gears, fourth intermediate gears, fifth intermediate gears, first bevel gears and second bevel gears corresponding to the respective clamp tool blocks;

[0023] The gear ring is installed on the base body through a bearing, and the driving motor drives the gear ring to rotate in a gear transmission mode;

[0024] The third intermediate gears are installed on the base body in a rotary connection mode and are engaged with the inner teeth of the gear ring respectively, the fourth intermediate gears are fixedly connected with the third intermediate gears, the fourth intermediate gears are engaged with the corresponding fifth intermediate gears installed on the base body in a rotary connection mode, the first bevel gears are fixedly connected with the fifth intermediate gears, and the first bevel gears are engaged with the second bevel gears installed on the driving shaft.

[0025] As a further improvement of the double-threaded rod rapid machining device, one end of the workpiece is provided with a connecting disc, and the tailstock is matched with a center hole on the connecting disc.

[0026] Compared with the prior art, the double-threaded rod rapid machining device has the following beneficial effects:

[0027] 1、The double-threaded rod rapid machining device can simultaneously process the outer cylindrical surface with four cutters, and the efficiency of processing the outer cylindrical surface is further improved compared with the existing double-cutter tower processing mode.

[0028] 2、Processing double helical groove, can be switched from four knife mode to double knife mode, at this time the second group of drive shaft corresponding to the lead screw is independently driven by the hollow shaft motor to move radially, this mode not only realizes the synchronous processing of double helical groove, but also the device only needs a slide to realize (the multi-tool cutting module is installed on the existing slide), without configuring two slides, saving the tedious process of redesigning the entire machine tool, reducing the difficulty and cost of transformation. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 Figure 1 is a structural schematic diagram of the multi-tool cutting module;

[0030] Figure 2 Figure 2 is a partial view of A in Figure 1; Figure 1

[0031] Figure 3 Figure 3 is a partial cross-sectional view of B-B in Figure 1; Figure 2

[0032] Figure 4 Figure 4 is a schematic diagram of the transmission structure inside the multi-tool cutting module;

[0033] Figure 5 Figure 5 is a partial view of C in Figure 1; Figure 4

[0034] Figure 6 Figure 6 is a schematic diagram of the overall structure of the double-threaded rod rapid processing device.

[0035] The reference signs include:

[0036] 1, base; 2, drive motor; 3, hollow shaft motor; 4, telescopic cylinder; 5, knife clamping block; 6, linear bearing; 7, pull rod; 8, rotating sleeve; 9, rotating shaft; 10, first intermediate gear; 11, second intermediate gear; 12, first synchronous pulley; 13, second synchronous pulley; 14, third synchronous pulley; 15, first bevel gear; 16, second bevel gear; 17, drive shaft; 18, first drive gear disc; 19, double-sided gear disc; 20, second drive gear disc; 21, lead screw; 22, nut; 23, gear ring; 24, third intermediate gear; 25, fourth intermediate gear; 26, fifth intermediate gear; 27, chuck; 28, slide; 29, connecting disc; 30, center. DETAILED DESCRIPTION

[0037] The technical scheme of the present application will be described in detail below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all.

[0038] As Figure 6 ​​​The utility model relates to a double-end threaded rod rapid processing device which is reformed on the basis of traditional lathe, including lathe bed, the lathe bed is installed with main shaft, sliding plate 28 and centre 30, the main shaft is installed with chuck 27, and one end of workpiece is installed on chuck 27, and the other end is installed with connecting disc 29 through locking screw, and the central hole on connecting disc 29 is matched with centre 30.The function of connecting disc 29 is to solve the problem that the workpiece diameter is small and cannot drill the appropriate central hole to tightly contact with centre 30.

[0039] Different from traditional lathe, the double-end threaded rod rapid processing device further includes multi-tool cutting module installed on sliding plate 28.

[0040] As Figure 1 and 2 , the multi-tool cutting module includes base body 1, and the base body 1 is provided with horizontal through hole, and the workpiece passes through the through hole.

[0041] The multi-tool cutting module further includes four clamping tool blocks 5 which are evenly distributed around the circumference of the through hole, and the clamping tool blocks 5 are slidingly connected with the base body 1 to realize movement in the radial direction of the through hole. The inner end of the clamping tool block 5 is used for installing the tool, and the four tools are arranged around the workpiece, so as to realize rapid cutting.

[0042] Further, as Figure 3 and 4 , the clamping tool block 5 is further provided with a nut 22, and the nut 22 is provided with a lead screw 21. When the lead screw 21 rotates, the clamping tool block 5 can be driven to move, so as to adjust the position of the tool.

[0043] As Figures 2 to 4 , the multi-tool cutting module further includes a driving motor 2 and a synchronous transmission mechanism installed on the base body 1, the input end of the synchronous transmission mechanism is drivingly connected with the driving motor 2, the synchronous transmission mechanism has four driving shafts 17 as output ends, and the four driving shafts 17 correspond to the four lead screws 21 one by one.

[0044] Specifically, as Figure 4 and Figure 5 , the synchronous transmission mechanism includes a gear ring 23, and further includes four groups of third intermediate gears 24, fourth intermediate gears 25, fifth intermediate gears 26, first bevel gears 15 and second bevel gears 16 which correspond to the respective clamping tool blocks 5.

[0045] The gear ring 23 is installed on the base body 1 through a bearing, and the driving motor 2 drives the gear ring 23 to rotate in a gear transmission mode. The gear installed on the output shaft of the driving motor 2 is engaged with the intermediate gear, the intermediate gear is engaged with the outer gear of the gear ring 23, so as to drive the gear ring 23 to rotate.

[0046] As Figure 5The third intermediate gears 24 are rotatably installed on the base body 1 and meshed with the inner teeth of the ring gear 23. The fourth intermediate gear 25 is fixedly connected with the third intermediate gear 24, and the fourth intermediate gear 25 is meshed with the fifth intermediate gear 26 rotatably installed on the base body 1. The first bevel gear 15 is fixedly connected with the fifth intermediate gear 26, and the first bevel gear 15 is meshed with the second bevel gear 16 installed on the driving shaft 17. When the ring gear 23 rotates, the third intermediate gear 24, the fourth intermediate gear 25, the fifth intermediate gear 26, the first bevel gear 15 and the second bevel gear 16 rotate, thereby driving the four driving shafts 17 to rotate synchronously.

[0047] Further, the driving shafts 17 and the lead screws 21 are rotatably installed on the base body 1. The driving shafts 17 are divided into two groups, and each group includes two driving shafts 17 arranged oppositely. The first group of driving shafts 17 are fixedly connected with the corresponding lead screws 21 or are integrated, and the second group of driving shafts 17 are drivingly connected with the corresponding lead screws 21 through a clutch mechanism, and the two clutch mechanisms are synchronously driven by the telescopic cylinder 4.

[0048] As shown in Figure 3 For the second group of driving shafts 17, the corresponding clutch mechanism includes the first driving gear plate 18, the second driving gear plate 20 and the double-sided gear plate 19.

[0049] The first driving gear plate 18 is installed on the end of the corresponding driving shaft 17, the double-sided gear plate 19 is sleeved on the corresponding lead screw 21 through spline fitting, and the second driving gear plate 20 is installed on the lead screw 21 through a bearing.

[0050] The double-sided gear plate 19 is located between the first driving gear plate 18 and the second driving gear plate 20, and the end teeth are arranged on the two side end faces of the double-sided gear plate 19. The side of the first driving gear plate 18 close to the double-sided gear plate 19 and the side of the second driving gear plate 20 close to the double-sided gear plate 19 are also provided with end teeth.

[0051] As shown in Figure 2 The multi-tool cutting module further includes a hollow shaft motor 3 installed on the base body 1, and the hollow shaft motor 3 is drivingly connected with the two lead screws 21 corresponding to the two driving shafts 17 of the second group through a parallel reverse transmission mechanism and two clutch mechanisms, so as to control the two lead screws 21 corresponding to the two driving shafts 17 of the second group to rotate reversely synchronously.

[0052] Specifically, the parallel reverse transmission mechanism includes a rotating shaft 9 installed in the inner hole of the hollow shaft motor 3, and further includes a first bearing seat, a second bearing seat and a third bearing seat installed on the base body 1.

[0053] The one end of the rotating shaft 9 is installed with a first intermediate gear 10, which is engaged with a second intermediate gear 11 installed on a first bearing seat. The second intermediate gear 11 is fixedly connected with a first synchronous pulley 12, which is connected with a second synchronous pulley 13 installed on a second bearing seat through a transmission belt, and the second synchronous pulley 13 is fixedly connected with a third synchronous pulley 14, which is drivingly connected with one of the second driving toothed discs 20 through a synchronous belt.

[0054] The other end of the rotating shaft 9 is installed with another first synchronous pulley 12, which is connected with another second synchronous pulley 13 installed on a third bearing seat through a transmission belt, and the other second synchronous pulley 13 is fixedly connected with another third synchronous pulley 14, which is drivingly connected with the other second driving toothed disc 20 through a synchronous belt.

[0055] It should be noted that the first intermediate gear 10 and the second intermediate gear 11 have equal number of teeth, so that when the two lead screws 21 are controlled to rotate by the corresponding second driving toothed discs 20, the rotation directions are always opposite and the rotation speeds are equal.

[0056] Further, as Figure 2 and Figure 3 The clutch mechanism further comprises a rotating sleeve 8 sleeved outside the double-sided toothed disc 19 through a bearing. The cylinder body of the telescopic cylinder 4 is installed with a support, and an optical shaft is connected to the support. The optical shaft and the telescopic rod of the telescopic cylinder 4 are respectively matched with two linear bearings 6 installed on the base body 1. The outer end of the optical shaft and the outer end of the telescopic rod are respectively connected with a pull rod 7, and the two pull rods 7 are connected with the two rotating sleeves 8 one by one. When the telescopic cylinder 4 is telescoped, the two rotating sleeves 8 are driven to move in opposite directions, so as to realize synchronous switching of the two work positions of the clutch mechanism. The telescopic cylinder 4 is preferably a pneumatic cylinder.

[0057] In operation, first, the workpiece is clamped, and then the clutch mechanism is controlled to ensure that the double-sided toothed disc 19 is engaged with the first driving toothed disc 18. At this time, the four lead screws 21 are all rotating under the driving of the driving motor 2, so as to realize synchronous movement of the four clamp blocks 5 and the cutters. Then, the main shaft is started to rotate the workpiece at high speed, and the four cutters are simultaneously controlled to reach the specified cutting depth. Then, the slide plate 28 is controlled to move, so as to complete rapid turning of the outer circle. After the outer circle is machined, the four clamp blocks 5 are simultaneously moved away from the workpiece, and then the telescopic cylinder 4 is actuated to move the double-sided toothed disc 19 towards the workpiece, so as to disengage from the first driving toothed disc 18 and engage with the second driving toothed disc 20, and switch to the double-cutter mode. Then, the hollow shaft motor 3 controls the corresponding two cutters to move radially to the specified cutting depth, so as to complete machining of the double helical grooves in cooperation with the main shaft.

[0058] When the double helical groove is processed, the workpiece is still in the state of being forced on both sides at the same time, so the bending does not occur.

[0059] It should be noted that, for those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. The scope of the present application is defined by the claims rather than the above description.

Claims

1. A rapid machining device for double-ended threaded rods, comprising a bed, on which a spindle, a slide plate (28), and a center (30) are mounted, and a chuck (27) is mounted on the spindle, wherein one end of a workpiece is mounted on the chuck (27) and the other end is connected to the center (30), characterized in that: It also includes a multi-blade cutting module mounted on the slide plate (28); The multi-blade cutting module includes a base (1) with a horizontal through hole through which the workpiece passes. The multi-blade cutting module also includes four clamping blocks (5) evenly distributed around the circumference of the through hole. The clamping blocks (5) are slidably connected to the base (1) to achieve movement along the radial direction of the through hole. The inner end of the clamping block (5) is used to install the cutting tool. A nut (22) is also installed on the clamping block (5), and a lead screw (21) is installed in the nut (22). The multi-blade cutting module also includes a drive motor (2) and a synchronous transmission mechanism mounted on the base (1). The input end of the synchronous transmission mechanism is connected to the drive motor (2). The synchronous transmission mechanism has four drive shafts (17) as output ends. The four drive shafts (17) correspond one-to-one with four lead screws (21). The drive shafts (17) and lead screws (21) are mounted on the base (1) by a rotating connection. The drive shaft (17) is divided into two groups, and the two drive shafts (17) in each group are arranged opposite to each other. The first group of drive shafts (17) is fixedly connected to the corresponding lead screw (21) or is integrated with it. The second group of drive shafts (17) is connected to the corresponding lead screw (21) through a clutch mechanism. The two clutch mechanisms operate synchronously under the drive of the telescopic cylinder (4). The multi-blade cutting module also includes a hollow shaft motor (3) mounted on the base (1). The hollow shaft motor (3) is connected to the two lead screws (21) corresponding to the two drive shafts (17) of the second group through a parallel reverse transmission mechanism and two clutch mechanisms, so as to control the two lead screws (21) corresponding to the two drive shafts (17) of the second group to rotate synchronously in the opposite direction. When the clutch mechanism is in the first position, the drive shaft (17) of the second group controls the corresponding lead screw (21) to rotate. When the clutch mechanism is in the second position, the hollow shaft motor (3) controls the two lead screws (21) corresponding to the two drive shafts (17) of the second group to rotate.

2. The rapid machining device for double-ended threaded rods as described in claim 1, characterized in that: For the second set of drive shafts (17), the corresponding clutch mechanism includes the first drive gear (18), the second drive gear (20) and the double-sided gear (19). The first drive gear (18) is installed at the end of the corresponding drive shaft (17), the double-sided gear (19) is fitted onto the corresponding lead screw (21) by a spline fit, and the second drive gear (20) is installed on the lead screw (21) by a bearing; The double-sided gear disk (19) is located between the first drive gear disk (18) and the second drive gear disk (20). Both sides of the double-sided gear disk (19) are provided with end teeth. The side of the first drive gear disk (18) near the double-sided gear disk (19) and the side of the second drive gear disk (20) near the double-sided gear disk (19) are both provided with end teeth.

3. The rapid machining device for double-ended threaded rods as described in claim 2, characterized in that: The parallel reverse transmission mechanism includes a rotating shaft (9) installed in the inner hole of the hollow shaft motor (3), and also includes a first bearing seat, a second bearing seat and a third bearing seat installed on the base (1); One end of the rotating shaft (9) is equipped with a first intermediate gear (10), which meshes with a second intermediate gear (11) mounted on a first bearing seat, and the first intermediate gear (10) and the second intermediate gear (11) have the same number of teeth; the second intermediate gear (11) is fixedly connected to a first synchronous pulley (12), which is connected to a second synchronous pulley (13) mounted on a second bearing seat via a transmission belt; the second synchronous pulley (13) is fixedly connected to a third synchronous pulley (14), which is connected to one of the second drive gear discs (20) via a synchronous belt; Another first synchronous pulley (12) is installed at the other end of the rotating shaft (9). The other first synchronous pulley (12) is connected to another second synchronous pulley (13) installed on the third bearing seat by a transmission belt. The other second synchronous pulley (13) is fixedly connected to another third synchronous pulley (14). The other third synchronous pulley (14) is connected to another second drive gear plate (20) by a synchronous belt.

4. The rapid machining device for double-ended threaded rods as described in claim 2, characterized in that: The clutch mechanism also includes a rotating sleeve (8) mounted on the outside of the double-sided gear disc (19) via a bearing. The telescopic cylinder (4) is connected to a pull rod (7) at each end, and the two pull rods (7) are connected to the two rotating sleeves (8) in a one-to-one correspondence.

5. The rapid machining device for double-ended threaded rods as described in claim 1, characterized in that: The synchronous transmission mechanism includes a gear ring (23), and also includes four sets of third intermediate gears (24), fourth intermediate gears (25), fifth intermediate gears (26), first bevel gears (15) and second bevel gears (16) corresponding to each clamping block (5); The gear ring (23) is mounted on the base (1) by bearings, and the drive motor (2) drives the gear ring (23) to rotate by gear transmission. Each third intermediate gear (24) is mounted on the base (1) by a rotatable connection and meshes with the internal teeth of the gear ring (23). The fourth intermediate gear (25) is fixedly connected to the third intermediate gear (24). The fourth intermediate gear (25) meshes with the corresponding fifth intermediate gear (26) mounted on the base (1) by a rotatable connection. The first bevel gear (15) is fixedly connected to the fifth intermediate gear (26), and the first bevel gear (15) meshes with the second bevel gear (16) mounted on the drive shaft (17).

6. The rapid machining device for double-ended threaded rods as described in any one of claims 1 to 5, characterized in that: A connecting plate (29) is installed at one end of the workpiece, and the tip (30) mates with the center hole on the connecting plate (29).

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