CN114939610A

CN114939610A - Equipment for forming screw parts

Info

Publication number: CN114939610A
Application number: CN202210364293.6A
Authority: CN
Inventors: 彭军
Original assignee: Shanghai Chun Zu Machinery Industry Co ltd
Current assignee: Shanghai Chun Zu Machinery Industry Co ltd
Priority date: 2022-04-08
Filing date: 2022-04-08
Publication date: 2022-08-26

Abstract

The invention discloses equipment for forming screw parts, which comprises a bar material feeding unit, wherein the bar material feeding unit comprises: at least one pair of pulling rolls; the rotary material rack is used for sleeving the bar material roll; a force bearing base which is fixedly arranged; the first compression roller group is arranged on the upper side of the bearing base and comprises at least one pair of first compression rollers; the second compression roller group is arranged on the upper side of the bearing base and comprises a plurality of pairs of second compression rollers; the guide roller group is arranged on the upper side of the bearing base and comprises two rows of guide rollers which are rotatably connected with the bearing base and used for clamping the bar; the rotary material rack, the first compression roller group, the second compression roller group, the guide roller group and the traction roller are sequentially arranged along the conveying direction of the bar, and the central axis of the first compression roller is perpendicular to the central axis of the second compression roller. By adopting the scheme, the bar stock can be fully straightened in the feeding stage.

Description

Equipment for forming screw parts

Technical Field

The invention relates to the technical field of metal part forming, in particular to equipment for forming a screw part.

Background

Currently, in the machines for forming screw elements, the feeding ring is a relatively separate part comprising at least one pair of drawing rollers driven in rotation by a motor for drawing the bar, and a rotating stack horizontally and rotatably connected to its base for nesting the coil.

Disclosure of Invention

The invention aims to provide equipment for forming screw parts, which can sufficiently straighten bar stocks in the feeding stage.

The purpose of the invention is realized as follows: an apparatus for forming screw parts, comprising a bar stock feeding unit, the bar stock feeding unit comprising:

at least one pair of drawing rollers driven by the motor to rotate relatively and used for drawing the bar stock;

the rotary material rack is horizontally and rotatably connected with the base of the rotary material rack and used for sleeving the bar material roll;

a force bearing base which is fixedly arranged;

the first compression roller group is arranged on the upper side of the bearing base and comprises at least one pair of first compression rollers which clamp and press the bar material up and down oppositely and are rotatably connected with the bearing base;

the second compression roller group is arranged on the upper side of the bearing base and comprises a plurality of pairs of second compression rollers which clamp and press the bar materials oppositely left and right and are rotatably connected with the bearing base;

the guide roller group is arranged on the upper side of the bearing base and comprises two rows of guide rollers which are rotatably connected with the bearing base and used for clamping the bar;

the rotary material rack, the first compression roller group, the second compression roller group, the guide roller group and the traction roller are sequentially arranged along the conveying direction of the bar, and the central axis of the first compression roller is perpendicular to the central axis of the second compression roller.

Further, the central axis of the guide roller is perpendicular to the central axis of the second press roller.

Further, the traction roller pulls the bar stock along the tangential direction of the rotating track of the rotating rack.

Furthermore, annular adjusting grooves are coaxially arranged on the cylindrical roller surfaces of the first pressing rollers, the adjusting grooves of each pair of first pressing rollers are oppositely arranged, so that the groove bottoms of the two adjusting grooves are oppositely contacted with the bar stock, a space defined by the two adjusting grooves is opposite to a gap between each pair of second pressing rollers in the axial direction of the bar stock, the groove width size of the adjusting grooves is larger than the diameter size of the bar stock, and the groove depth size of the adjusting grooves is smaller than the radius size of the bar stock.

The invention has the beneficial effects that:

1. the central axis of the first press roller is vertical to the central axis of the second press roller, so that the clamping acting forces of the first press roller group and the second press roller group are vertical to each other, the bar stock is straightened in two vertical directions, the straightness of the bar stock is improved, and the subsequent further processing is facilitated;

2. the coaxial annular adjustment groove that is equipped with of cylinder roll surface of first compression roller, consider that the bar can have the distortion of certain degree when unreeling, so, the groove width size in adjustment groove is greater than the diameter size of bar, the bar is corrected in the upper and lower clamp-pressing earlier, in order to ensure the upper and lower clamp-pressing effect, the groove depth size in adjustment groove is less than the radius size of bar, the bar is after the preliminary aligning through first compression roller group, utilize the second compression roller group about the clamp-pressing effect carry out the operation of aligning bar, maintain the bar shape after the aligning through the guide roller group at last, make the bar can level ground, send the position of carry over pinch rolls straight line.

Drawings

Fig. 1 is a schematic side view of the present invention.

Fig. 2 is a schematic diagram showing a relative relationship between the first nip roller group and the second nip roller group in an overhead view.

Fig. 3 is a schematic view of a first nip roller set.

Detailed Description

The invention will be further described with reference to the accompanying figures 1-3 and specific examples. The present embodiment is described with respect to a bolt manufacturing application.

As shown in fig. 1-2, an apparatus for forming screw parts includes a bar stock feeding unit including:

a pair of traction rollers 5 driven by a motor to rotate relatively and used for drawing the bar 8, wherein the traction rollers 5 are generally arranged at the inlet of a main box body of the processing unit;

the rotary material rack 1 is horizontally and rotatably connected with the base and is used for sleeving the bar material roll 7;

a force bearing base 6 is fixedly arranged;

the first compression roller group 2 is arranged on the upper side of the bearing base 6, and the first compression roller group 2 comprises a pair of first compression rollers 201 which are used for clamping and pressing the bar stock 8 up and down oppositely and are rotatably connected with the bearing base 6;

the second press roller group 3 is arranged on the upper side of the bearing base 6, and the second press roller group 3 comprises a plurality of pairs of second press rollers 301 which clamp and press the bar 8 oppositely at the left and right and are rotatably connected with the bearing base 6;

the guide roller group 4 is arranged on the upper side of the bearing base 6, and the guide roller group 4 comprises two rows of guide rollers 4a which are rotatably connected with the bearing base 6 and used for clamping the bar 8.

The rotary material rack 1, the first pressing roller group 2, the second pressing roller group 3, the guide roller group 4 and the traction roller 5 are sequentially arranged along the conveying direction of the bar 8, and the central axis of the first pressing roller 201 is perpendicular to the central axis of the second pressing roller 301. So that the clamping and pressing acting forces of the first pressing roller group 2 and the second pressing roller group 3 are mutually vertical, the bar 8 is straightened in two mutually vertical directions, the straightness of the bar 8 is improved, and the subsequent further processing is facilitated.

The central axis of the guide roller 4a is perpendicular to the central axis of the second press roller 301, so that the bar stock 8 can be straightened by two rows of guide rollers 4a in addition to the guide function.

In order to reduce the blocking force of feeding, the traction roller 5 pulls the bar stock 8 along the tangential direction of the rotating track of the rotating rack 1.

In the whole unwinding process of the bar 8, the unwound bar 8 is in a horizontal straight line state when passing through the guide roller set 4.

As shown in fig. 2 and 3, the cylindrical roll surface of the first pressing roll 201 is coaxially provided with annular adjusting grooves 201a, the adjusting grooves 201a of each pair of first pressing rolls 201 are arranged oppositely, so that the groove bottom surfaces of the two adjusting grooves 201a are in contact with the bar stock 8 oppositely, and a space enclosed by the two adjusting grooves 201a is opposite to a gap between each pair of second pressing rolls 301 in the axial direction of the bar stock 8, the groove width dimension of the adjusting grooves 201a is larger than the diameter dimension of the bar stock 8, the groove width dimension of the adjusting grooves 201a is at least twice of the diameter dimension of the bar stock 8, and the groove depth dimension of the adjusting grooves 201a is smaller than the radius dimension of the bar stock 8.

Considering that the bar 8 can have a certain degree of distortion when unreeling, therefore, the groove width size of the adjusting groove 201a is greater than the diameter size of the bar 8, press and correct the bar 8 up and down first, in order to ensure the effect of press and down, the groove depth size of the adjusting groove 201a is less than the radius size of the bar 8, after the bar 8 is primarily straightened by the first press roller group 2, the operation of straightening the bar 8 is performed by the left and right pressing action of the second press roller group 2, and finally the shape of the straightened bar 8 is maintained by the guide roller group 4, so that the bar 8 can be horizontally and linearly sent to the position of the traction roller 5.

The two rows of guide rollers 4a of the guide roller group 4 are staggered with each other.

The second press roller group 3 is relatively close to the guide roller group 4, and the horizontal distance between the second press roller group 3 and the first press roller group 2 is larger than that between the second press roller group 3 and the guide roller group 4.

The gap between each pair of second press rollers 301 is just opposite to the gap between the two rows of guide rollers 4a along the axial direction of the bar 8, so that the straightening straightness of the bar 8 is guaranteed.

While the preferred embodiments of the present invention have been described, it will be appreciated by those skilled in the art that various changes and modifications may be made therein without departing from the general concept of the invention as defined by the appended claims.

Claims

1. An apparatus for forming screw parts, comprising a bar stock feeding unit, the bar stock feeding unit comprising:

at least one pair of traction rollers (5) driven by a motor to rotate relatively and used for drawing the bar stock (8);

a rotary material rack (1) which is horizontally and rotatably connected with the base and is used for sleeving a bar material roll (7);

it is characterized by also comprising:

a bearing base (6) is fixedly arranged;

the first compression roller group (2) is arranged on the upper side of the bearing base (6), and the first compression roller group (2) comprises at least one pair of first compression rollers (201) which are used for clamping and pressing the bar (8) up and down oppositely and are rotatably connected with the bearing base (6);

the second press roll group (3) is arranged on the upper side of the bearing base (6), and the second press roll group (3) comprises a plurality of pairs of second press rolls (301) which clamp and press the bars (8) oppositely left and right and are rotatably connected with the bearing base (6);

the guide roller group (4) is arranged on the upper side of the bearing base (6), and the guide roller group (4) comprises two rows of guide rollers (4a) which are rotatably connected with the bearing base (6) and used for clamping the bar stock (8);

the rotary material rack (1), the first compression roller group (2), the second compression roller group (3), the guide roller group (4) and the traction roller (5) are sequentially arranged along the conveying direction of the bar (8), and the central axis of the first compression roller (201) is perpendicular to the central axis of the second compression roller (301).

2. An apparatus for forming screw parts according to claim 1, wherein: the central axis of the guide roller (4a) is perpendicular to the central axis of the second press roller (301).

3. An apparatus for forming screw parts according to claim 1, wherein: the traction roller (5) pulls the bar stock (8) along the tangential direction of the rotating track of the rotating rack (1).

4. An apparatus for forming screw parts according to claim 1, wherein: the cylindrical roll surface of the first pressing roll (201) is coaxially provided with annular adjusting grooves (201a), the adjusting grooves (201a) of each pair of first pressing rolls (201) are oppositely arranged, so that the groove bottoms of the two adjusting grooves (201a) are relatively contacted with the bar stock (8), the space surrounded by the two adjusting grooves (201a) is opposite to the gap between each pair of second pressing rolls (301) in the axial direction of the bar stock (8), the groove width size of the adjusting grooves (201a) is larger than the diameter size of the bar stock (8), and the groove depth size of the adjusting grooves (201a) is smaller than the radius size of the bar stock (8).

5. An apparatus for forming screw parts according to claim 1, wherein: the two rows of guide rollers (4a) of the guide roller group (4) are mutually staggered.

6. The apparatus for forming screw part according to claim 1, wherein: the second press roller group (3) is relatively close to the guide roller group (4).

7. An apparatus for forming screw parts according to claim 4, wherein: the groove width dimension of the adjusting groove (201a) is at least twice the diameter dimension of the bar stock (8).

8. An apparatus for forming screw parts according to any one of claims 1 to 7, wherein: the gap between each pair of second press rolls (301) is opposite to the gap between the two rows of guide rolls (4a) along the axial direction of the bar (8).