Thread rolling machine for cold extrusion production of stud bolt

Abstract

The utility model relates to the technical field of thread rolling machines, and provides a thread rolling machine for cold extrusion production of a stud bolt, which comprises a base, a support block fixedly connected with the middle of the top surface of the base and used for placing a workpiece, thread rolling mechanisms arranged at two ends of the top of the base, and a slide rail fixedly connected with the top of the base, the sliding rail is slidably connected with a movable seat, the inner side of the movable seat is rotationally connected with a rolling wheel abutting against a workpiece through translation, one end of the movable seat is provided with a transmission assembly driving the rolling wheel to rotate, and one end of the base is provided with a pushing assembly driving the movable seat to slide along the sliding rail. The elastic performance of the elastic connecting piece can act on the rolling wheel in time to enable the rolling wheel to abut against the workpiece again when the workpiece is rubbed, and therefore the problem that the workpiece deviates from the preset position due to the fact that the workpiece is rubbed by the supporting block can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of thread rolling machines, and in particular to a thread rolling machine for cold extrusion production of big head bolts. Background Art

[0002] The thread rolling machine is a multifunctional cold extrusion forming machine tool. The thread rolling machine can perform thread, straight grain, twill grain rolling and other processes on the workpiece in the cold state within its rolling force range.

[0003] After searching, the Chinese patent publication number CN210848145U discloses "a bolt thread rolling mechanism, including two rolling wheels, and also including a support assembly arranged between and below the two rolling wheels, the support assembly includes a mounting block, a sliding groove opened on the mounting block and extending along the axial direction of the rolling wheel, a support block arranged in the sliding groove, and a rotating roller rotatably connected to the support block, and the axis of the rotating roller is parallel to the axis of the rolling wheel."

[0004] The above patent achieves the purpose of reducing the impact on the quality of the workpiece by converting the friction between the workpiece and the support assembly into rolling friction. Although the friction between the workpiece and the support block is reduced to a certain extent, no further treatment is performed to reduce the friction. As a result, after the thread rolling machine has been running for a long time, the distance between the support block and the rolling wheel increases due to the friction, causing the workpiece to be processed to deviate from the preset position, thereby affecting the thread processing accuracy of the workpiece surface. In view of this, the utility model proposes a thread rolling machine for cold extrusion production of big head bolts. Utility Model Content

[0005] The utility model provides a thread rolling machine for cold extrusion production of big head bolts, which solves the problem in the prior art that a workpiece to be processed easily deviates from a preset position.

[0006] The technical solution of the utility model is as follows: A thread rolling machine for cold extrusion production of big-head bolts, comprising a base, a support block for placing a workpiece is fixedly connected to the middle of the top surface of the base, thread rolling mechanisms are arranged at both ends of the top of the base, the thread rolling mechanism comprises a slide rail, the slide rail is fixedly connected to the top of the base, a movable seat is slidably connected to the slide rail, a rolling wheel that contacts the workpiece through translation is rotatably connected to the inner side of the movable seat, a transmission assembly for driving the rolling wheel to rotate is arranged at one end of the movable seat, and a pushing assembly for driving the movable seat to slide along the slide rail is arranged at one end of the base.

[0007] Preferably, the transmission assembly includes a worm wheel, which is coaxially fixedly connected to the rolling wheel, one end of the movable seat is rotatably connected to a worm meshing with the worm wheel, and a driving mechanism for driving the worm to rotate is provided on the top of the base.

[0008] Preferably, the pushing assembly includes a fixed plate, the fixed plate is fixedly connected to one end of the base, one side of the fixed plate is fixedly connected to a cylinder, the output end of the cylinder is fixedly connected to an elastic connecting piece, and the end of the elastic connecting piece away from the cylinder is fixedly connected to the movable seat.

[0009] Preferably, the elastic connecting member includes a sleeve, one end of the sleeve is fixedly connected to the movable seat, the other end of the sleeve is slidably connected to a sliding rod that passes through the side wall of the sleeve, one end of the sliding rod is fixedly connected to a connecting plate, the connecting plate is fixedly connected to the output end of the cylinder, the other end of the sliding rod is fixedly connected to a sliding block, and the outer edge of the sliding block is slidably connected to the inner wall of the sleeve.

[0010] Preferably, the elastic connecting member further comprises a pressure spring, which is sleeved on the inner side of the sleeve, one end of the pressure spring abuts against the slider, and the other end of the pressure spring abuts against the inner wall of the sleeve.

[0011] Preferably, the driving mechanism includes a mounting seat, the mounting seat is fixedly connected to the top of the base, the inner side of the mounting seat is rotatably connected to a telescopic shaft, the two ends of the telescopic shaft are respectively fixedly connected to two worm gears, the middle part of the telescopic shaft is fixedly connected to bevel gear 1, the top of the base is fixedly installed with a motor, the output shaft of the motor is fixedly connected to bevel gear 2, and bevel gear 2 is meshed with bevel gear 1.

[0012] Preferably, the telescopic shaft comprises a sleeve shaft, both ends of the sleeve shaft are slidably connected with an insertion shaft, the outer sides of the two insertion shafts are fixedly connected with a limit bar, and the limit bar is slidably connected to the inner wall of the sleeve shaft.

[0013] Preferably, a limiting groove matching the limiting strip is formed on the inner wall of the sleeve shaft, and the limiting strip is slidably connected to the inner wall of the limiting groove.

[0014] The working principle and beneficial effects of the utility model are as follows: by controlling the cylinder, the elastic connecting part can push the movable seat along the slide rail to approach the workpiece, so that the rolling wheel can contact the workpiece, and then the rolling wheel is rotated through the transmission component to realize the thread rolling of the workpiece, wherein, as the workpiece is affected by friction and a gap appears between the workpiece and the rolling wheel, the elastic properties of the elastic connecting part itself can act on the rolling wheel in time to make it contact with the workpiece again, thus avoiding the problem of the workpiece deviating from the preset position due to the friction of the support block. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0016] Figure 1 It is a structural schematic diagram of a thread rolling machine for cold extrusion production of big head bolts of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the thread rolling mechanism of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the elastic connecting piece of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the driving mechanism of the utility model;

[0020] Figure 5 It is a structural schematic diagram of the telescopic shaft of the utility model.

[0021] In the figure: 1. base; 2. support block; 3. workpiece; 4. thread rolling mechanism; 41. slide rail; 42. movable seat; 43. rolling wheel; 44. transmission assembly; 441. worm gear; 442. worm; 45. pushing assembly; 451. fixing plate; 452. cylinder; 453. elastic connecting piece; 4531. sleeve; 4532. slider; 4533. slide rod; 4534. connecting plate; 4535. pressure spring; 5. driving mechanism; 51. mounting seat; 52. telescopic shaft; 521. sleeve shaft; 522. plug shaft; 523. limit strip; 524. limit groove; 53. bevel gear one; 54. motor; 55. bevel gear two. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1~Figure 5As shown, this embodiment proposes a thread rolling machine for cold extrusion production of big head bolts, including a base 1, a support block 2 for placing a workpiece 3 is fixedly connected to the middle of the top surface of the base 1, and thread rolling mechanisms 4 are arranged at both ends of the top of the base 1. The thread rolling mechanism 4 includes a slide rail 41, which is fixedly connected to the top of the base 1, and a movable seat 42 is slidably connected to the slide rail 41. The inner side of the movable seat 42 is rotatably connected to a rolling wheel 43 that contacts the workpiece 3 through translation. A transmission component 44 for driving the rolling wheel 43 to rotate is arranged at one end of the movable seat 42, and a pushing component 45 for driving the movable seat 42 to slide along the slide rail 41 is arranged at one end of the base 1. The pushing component 45 includes a fixed plate 451, which is fixedly connected to one end of the base 1, and a cylinder 452 is fixedly connected to one side of the fixed plate 451. The output end of the cylinder 452 is fixedly connected to an elastic connecting member 453, and the end of the elastic connecting member 453 away from the cylinder 452 is fixedly connected to the movable seat 42.

[0024] By controlling the cylinder 452, the elastic connecting member 453 can push the movable seat 42 along the slide rail 41 to approach the workpiece 3, so that the rolling wheel 43 can come into contact with the workpiece, and then the rolling wheel 43 is rotated through the transmission assembly 44 to realize the thread rolling of the workpiece. As the workpiece is affected by friction and a gap appears between it and the rolling wheel 43, the elastic properties of the elastic connecting member 453 itself can act on the rolling wheel 43 in time to make it come into contact with the workpiece again, thereby avoiding the problem of the workpiece deviating from the preset position due to the friction of the support block 2.

[0025] Furthermore, the elastic connecting member 453 includes a sleeve 4531, one end of which is fixedly connected to the movable seat 42, and the other end of the sleeve 4531 is slidably connected to a sliding rod 4533 that penetrates the side wall of the sleeve 4531, one end of the sliding rod 4533 is fixedly connected to a connecting plate 4534, and the connecting plate 4534 is fixedly connected to the output end of the cylinder 452, and the other end of the sliding rod 4533 is fixedly connected to a slider 4532, and the outer edge of the slider 4532 is slidably connected to the inner wall of the sleeve 4531, and a pressure spring 4535 is sleeved on the inner side of the sleeve 4531, one end of the pressure spring 4535 is in contact with the slider 4532, and the other end of the pressure spring 4535 is in contact with the inner wall of the sleeve 4531. During operation, the pressure spring 4535 can continuously apply elastic force to the sleeve 4531 and the slider 4532, so that the sleeve 4531 always applies thrust to the movable seat 42, so that the rolling wheel 43 continuously contacts the workpiece, thereby avoiding the problem of a gap between the rolling wheel 43 and the workpiece.

[0026] Furthermore, the transmission assembly 44 includes a worm wheel 441, which is coaxially fixedly connected to the rolling wheel 43, one end of the movable seat 42 is rotatably connected to a worm 442 meshing with the worm wheel 441, and a driving mechanism 5 for driving the worm 442 to rotate is provided on the top of the base 1. The driving mechanism 5 can drive the two worms 442 to rotate synchronously, which makes the two worm wheels 441 rotate synchronously, thereby making the two rolling wheels 43 rotate synchronously to realize the thread rolling work on the workpiece.

[0027] Furthermore, the driving mechanism 5 includes a mounting base 51, which is fixedly connected to the top of the base 1, and a telescopic shaft 52 is rotatably connected to the inner side of the mounting base 51. The two ends of the telescopic shaft 52 are respectively fixedly connected to two worm gears 442, and a bevel gear 1 53 is fixedly connected to the middle of the telescopic shaft 52. A motor 54 is fixedly installed on the top of the base 1, and the output shaft of the motor 54 is fixedly connected to a bevel gear 2 55, which meshes with the bevel gear 1 53.

[0028] Furthermore, the telescopic shaft 52 includes a sleeve shaft 521, both ends of which are slidably connected to the plug shaft 522, and the outer sides of the two plug shafts 522 are fixedly connected to limit bars 523, the limit bars 523 are slidably connected to the inner wall of the sleeve shaft 521, and the inner wall of the sleeve shaft 521 is provided with a limit groove 524 matching the limit bar 523, and the limit bar 523 is slidably connected to the inner wall of the limit groove 524. The limit bar 523 is used to limit the relative rotation between the sleeve shaft 521 and the plug shaft 522, so as to ensure that the plug shaft 522 always keeps synchronous rotation with the sleeve shaft 521 during the sliding process.

[0029] Working principle: By controlling the air cylinder 452, the elastic connecting member 453 can push the movable seat 42 along the slide rail 41 to approach the workpiece 3, so that the rolling wheel 43 can contact the workpiece, and then the motor 54 is started to rotate the bevel gear 2 55, which makes the bevel gear 1 53 rotate synchronously, which makes the sleeve shaft 521 drive the two plug shafts 522 to rotate synchronously, and also makes the two worms 442 rotate synchronously, which makes the two worm wheels 441 rotate synchronously, so that the two rolling wheels 43 rotate synchronously to realize the thread rolling work on the workpiece;

[0030] During operation, the pressure spring 4535 can continuously apply elastic force to the sleeve 4531 and the slider 4532, so that the sleeve 4531 always applies thrust to the movable seat 42, so that the rolling wheel 43 continuously contacts the workpiece, thereby avoiding the problem of a gap between the rolling wheel 43 and the workpiece.

[0031] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A thread rolling machine for cold extrusion production of big head bolts, comprising a base (1), a support block (2) for placing a workpiece (3) being fixedly connected to the middle of the top surface of the base (1), characterized in that: Both ends of the top of the base (1) are provided with a thread rolling mechanism (4), the thread rolling mechanism (4) comprising a slide rail (41), the slide rail (41) being fixedly connected to the top of the base (1), a movable seat (42) being slidably connected to the slide rail (41), a rolling wheel (43) being rotatably connected to the inner side of the movable seat (42) and contacting the workpiece (3) through translation, a transmission component (44) for driving the rolling wheel (43) to rotate is provided at one end of the movable seat (42), and a pushing component (45) for driving the movable seat (42) to slide along the slide rail (41) is provided at one end of the base (1).

2. A thread rolling machine for cold extrusion production of big head bolts according to claim 1, characterized in that: The transmission assembly (44) comprises a worm wheel (441) which is coaxially fixedly connected to the rolling wheel (43); one end of the movable seat (42) is rotatably connected to a worm (442) meshing with the worm wheel (441); and a driving mechanism (5) for driving the worm (442) to rotate is disposed on the top of the base (1).

3. The thread rolling machine for cold extrusion production of big head bolts according to claim 1, characterized in that: The pushing assembly (45) comprises a fixed plate (451), the fixed plate (451) being fixedly connected to one end of the base (1), a cylinder (452) being fixedly connected to one side of the fixed plate (451), an elastic connecting member (453) being fixedly connected to the output end of the cylinder (452), and an end of the elastic connecting member (453) away from the cylinder (452) being fixedly connected to the movable seat (42).

4. A thread rolling machine for cold extrusion production of big head bolts according to claim 3, characterized in that: The elastic connecting member (453) comprises a sleeve (4531), one end of the sleeve (4531) is fixedly connected to the movable seat (42), the other end of the sleeve (4531) is slidably connected to a sliding rod (4533) penetrating the side wall of the sleeve (4531), one end of the sliding rod (4533) is fixedly connected to a connecting plate (4534), the connecting plate (4534) is fixedly connected to the output end of the cylinder (452), the other end of the sliding rod (4533) is fixedly connected to a sliding block (4532), and the outer edge of the sliding block (4532) is slidably connected to the inner wall of the sleeve (4531).

5. A thread rolling machine for cold extrusion production of big head bolts according to claim 4, characterized in that: The elastic connecting member (453) further comprises a pressure spring (4535), wherein the pressure spring (4535) is sleeved on the inner side of the sleeve (4531), one end of the pressure spring (4535) abuts against the slider (4532), and the other end of the pressure spring (4535) abuts against the inner wall of the sleeve (4531).

6. The thread rolling machine for cold extrusion production of big head bolts according to claim 2, characterized in that: The driving mechanism (5) comprises a mounting seat (51), the mounting seat (51) being fixedly connected to the top of the base (1), a telescopic shaft (52) being rotatably connected to the inner side of the mounting seat (51), two ends of the telescopic shaft (52) being respectively fixedly connected to two worm gears (442), a middle portion of the telescopic shaft (52) being fixedly connected to a bevel gear 1 (53), a motor (54) being fixedly mounted on the top of the base (1), an output shaft of the motor (54) being fixedly connected to a bevel gear 2 (55), and the bevel gear 2 (55) being meshed with the bevel gear 1 (53).

7. A thread rolling machine for cold extrusion production of big head bolts according to claim 6, characterized in that: The telescopic shaft (52) comprises a sleeve shaft (521), both ends of the sleeve shaft (521) are slidably connected to an insertion shaft (522), the outer sides of the two insertion shafts (522) are fixedly connected to a limit strip (523), and the limit strip (523) is slidably connected to the inner wall of the sleeve shaft (521).

8. The thread rolling machine for cold extrusion production of big head bolts according to claim 7, characterized in that: A limiting groove (524) matching the limiting strip (523) is provided on the inner wall of the sleeve shaft (521), and the limiting strip (523) is slidably connected to the inner wall of the limiting groove (524).

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