CN219402182U - Cold header feeding system - Google Patents

Abstract

The utility model discloses a cold header feeding system, which comprises: a feeding frame; a servo motor mounted to the feed frame; the conveying roller assembly is arranged on the feeding frame and comprises a driven roller and a driving roller, the driving roller is driven by the servo motor, the driven roller is positioned above the driving roller, a conveying channel is formed between the driven roller and the driving roller, and the conveying roller assembly has a conveying direction for conveying wires from the wire material frame to the blank conveying device; the cutting device is arranged in front of the conveying roller assembly and is provided with a cutter capable of moving back and forth, and the conveying channel is located on the moving path of the cutter. Compared with the prior art, the wire pushing mechanism and the limiting block are abandoned, and the revolute pair driven by the servo motor is additionally arranged on the basis of the original roller, so that high-precision wire conveying is realized.

Description

Cold header feeding system

Technical Field

The utility model relates to the technical field of cold header, in particular to a cold header feeding system.

Background

The cold header is forging forming equipment for thickening the top of a bar or a wire rod at room temperature, and is special equipment mainly used for upsetting and mass production of fasteners such as bolts. The head of the bolt is headed by the cold heading machine by adopting the cold heading method, so that the bolt is directly molded into a required shape and size, a large amount of materials can be saved, the production efficiency can be greatly improved, and the mechanical strength of the headed part is remarkably improved.

As shown in fig. 1, this is a feeding system of a conventional cold header in which a wire is fed into a conveying passage composed of a plurality of rollers by a wire pushing mechanism. Because different fasteners have different length specifications, the tail end of the conveying channel is provided with a limiting block which can be movably installed, and a cutting device for cutting off wires is arranged between the limiting block and the roller. The position of the limiting block can be adjusted randomly along the conveying direction parallel to the wire rod, after the position of the limiting block is fixed, the wire rod pushing mechanism can be abutted against the limiting block every time the wire rod is conveyed into the conveying channel, the distance between the limiting block and the cutting device is the preset length of the fastener blank, and the wire rod can be cut by the cutting device to obtain the fastener blank with the preset length.

Although the feeding system of the existing cold header can obtain fastener blanks with preset length, the limiting block is movably arranged, so that after multiple processing, the position of the limiting block can be changed due to the thrust of a wire rod, the distance between the limiting block and a cutting device is changed, and then the intercepting length of the fastener blanks is affected. Moreover, because the wire rod is abutted against the limiting block under the thrust of the wire rod pushing mechanism, when the rigidity of the wire rod is poor, the wire rod is easy to bend, and the intercepting length of the fastener blank is affected.

Disclosure of Invention

The utility model aims to provide a cold header feeding system capable of improving the manufacturing precision of a fastener.

According to an embodiment of the first aspect of the present utility model, a cold header feeding system includes:

a feed rack located between a wire rack for unreeling wire and a blank conveying device for conveying intercepted fastener blanks to a cold heading die;

a servo motor mounted to the feed frame;

the conveying roller assembly is arranged on the feeding frame and comprises a driven roller and a driving roller, the driving roller is driven by the servo motor, the driven roller is positioned above the driving roller, a conveying channel through which a wire rod can pass is formed between the driven roller and the driving roller, and the conveying roller assembly has a conveying direction from the wire rod material frame to the blank conveying device;

the cutting device is arranged between the conveying roller assembly and the blank conveying device, the cutting device is provided with a cutter capable of moving back and forth, and the conveying channel is located on the moving path of the cutter.

The cold header feeding system provided by the embodiment of the utility model has at least the following beneficial effects: compared with the prior art, the utility model abandons the existing wire pushing mechanism and the limiting block, and adds the revolute pair driven by the servo motor on the basis of the original roller, and the servo motor has the characteristics of small electromechanical time constant, high linearity and the like, and can convert the received electric signal into the angular displacement or angular velocity output on the motor shaft, so that the conveying roller assembly can realize high-precision conveying of the wire under the driving of the servo motor, the intercepting length of the fastener blank can be closer to the preset length, the transformation amplitude of the original cold header is smaller, the transformation cost is relatively low, and the utility model is very suitable for old transformation projects of the cold header.

According to some embodiments of the present utility model, in order to enhance the conveying effect, the number of the conveying roller assemblies is two, and the two conveying roller assemblies are spaced along the conveying direction of the wire.

According to some embodiments of the utility model, in order to save costs, a transmission gear assembly is arranged between the servo motor and the two driving rollers, and the servo motor drives the two driving rollers simultaneously through the transmission gear assembly.

According to some embodiments of the utility model, in order to convey wires of different diameters, the feeding frame is slidably connected with a slider in an up-down direction, the driven roller is rotatably connected with the slider, the feeding frame is connected with an adjusting mechanism, and a relative position between the slider and the feeding frame is defined by the adjusting mechanism.

According to some embodiments of the utility model, the adjusting mechanism comprises a nut block and a screw rod screwed on the nut block, one end of the screw rod is fixedly connected with the sliding block, the nut block is fixedly connected with the feeding frame, and the arrangement direction of the screw rod is parallel to the sliding direction of the sliding block.

According to some embodiments of the utility model, to facilitate manual adjustment of the position of the driven roller, an adjustment handle is connected to the other end of the screw.

According to some embodiments of the utility model, in order to facilitate electric adjustment of the position of the driven roller, the other end of the screw is connected with a driving motor.

According to some embodiments of the utility model, the outer peripheral surface of the driving roller and the outer peripheral surface of the driven roller are respectively provided with a first wire feeding groove and a second wire feeding groove, and the first wire feeding groove and the second wire feeding groove jointly limit the degree of freedom of the wire and can straighten the wire.

According to some embodiments of the utility model, to facilitate manual adjustment of the servo motor by an operator, the cold header feed system further comprises a remote control hand wheel provided with a control module in communication with the servo motor. In the manual debugging process, each time after the cold header finishes machining a group of fasteners, an operator can use a measuring tool to measure the tolerance of the fasteners, and according to the measured tolerance, the operator can directly use the remote control hand wheel to adjust the rotation parameters of the servo motor so as to compensate the accumulated error of the cold header die.

According to some embodiments of the utility model, the permanent magnet synchronous servo motor has the advantages of high power factor, high efficiency, simple structure, reliable operation, small volume, light weight, small loss and the like, so that the servo motor can be selected as the permanent magnet synchronous servo motor.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic diagram of a prior art cold header feed system;

FIG. 2 is a schematic diagram of a front structure of a cold header feed system according to an embodiment of the present utility model;

fig. 3 is a schematic view of a back side structure of a cold header feeding system according to an embodiment of the present utility model.

In the accompanying drawings: 100-feeding frame, 200-conveying roller assembly, 600-wire rod, 210-driven roller, 220-driving roller, 201-conveying channel, 221-driving shaft, 211-driven shaft, 212-second bearing, 222-driving gear, 310-driving gear, 410-cutter, 300-transmission gear assembly, 110-chute, 111-slide block, 500-adjusting mechanism, 510-nut block, 520-screw rod and 521-adjusting handle.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

As shown in fig. 2, a cold header feeding system according to an embodiment of the first aspect of the present utility model includes a feeding frame 100, a servo motor (not shown in the drawings), a conveying roller assembly 200, and a cutting device, the feeding frame 100 being a part of the cold header, which is disposed between a blank conveying device (not shown in the drawings) and a wire material frame (not shown in the drawings). The wire material rack is externally arranged on a cold header and is provided with a freely rotatable unreeling frame, the unreeling frame is used for unreeling the wire material 600, and the blank conveying device is provided with a pushing mechanism which is used for conveying intercepted fastener blanks to a cold header die (not shown in the drawing), and the cold header die is used for implementing a cold header process. Since both the wire material rack and the blank conveying device are prior art, the present utility model is not described in detail herein.

In addition, the feeding frame 100 is provided with the servo motor and the conveying roller assembly 200, and the servo motor can be selected as a permanent magnet synchronous servo motor because the permanent magnet synchronous servo motor has the advantages of high power factor, high efficiency, simple structure, reliable operation, small volume, light weight, small loss and the like. The conveying roller assembly 200 includes a driven roller 210 and a driving roller 220, the driving roller 220 is located right below the driven roller 210, the driving roller 220 and the driven roller 210 are disposed at intervals in the up-down direction, and a conveying channel 201 is formed therebetween, so that the wire 600 can pass through the conveying channel 201. It will be appreciated that the utility model is not limited to the type of servo motor and that other types of devices may be selected by those skilled in the art based on the action of the servo motor.

Specifically, the outer peripheral surface of the driving roller 220 is provided with a plurality of first wire feeding grooves along the axial direction, the outer peripheral surface of the driven roller 210 is provided with a plurality of second wire feeding grooves along the axial direction, all the first wire feeding grooves and all the second wire feeding grooves are respectively arranged in one-to-one correspondence, the sizes of the wire feeding grooves are sequentially changed along the axial direction, the combined shapes of the first wire feeding grooves and the corresponding second wire feeding grooves are consistent with the shape of the wire, so that the surface contact of the wire is realized, the degree of freedom of the wire can be limited, the wire is prevented from shifting during conveying, and the wire straightening can be realized. Moreover, the arrangement of the wire feeding grooves can adapt to wires with different diameters so as to improve the applicability of the conveying roller assembly 200. The driving roller 220 is connected with a driving shaft 221, and the feeding frame 100 is provided with a first bearing capable of bearing the driving shaft 221, so that the driving roller 220 can be rotatably connected to the feeding frame 100. Similarly, the driven roller 210 is connected with a driven shaft 211, and the feeding frame 100 is provided with a second bearing 212 capable of bearing the driven shaft 211, so that the driven roller 210 can be rotatably connected to the feeding frame 100.

As shown in fig. 3, the driving shaft 221 is connected to a driving gear 222 at the back of the feeding frame 100, the servo motor is mounted at the back of the feeding frame 100, the main shaft of the servo motor is connected to a driving gear 310, and the driving gear 310 is meshed with the driving gear 222, so that the servo motor can drive the driving roller 220 to rotate. The upper and lower surfaces of the wire 600 are respectively and closely abutted against the driven roller 210 and the driving roller 220, and the wire 600 is conveyed along the conveying direction of the wire rack to the blank conveying device under the rotation action of the driving roller 220. For convenience of description, the present embodiment defines a direction from the wire material rack toward the blank conveying device as an advancing direction.

As shown in fig. 2, the cutting device is disposed in front of the feed roller assembly 200 and behind the blank feed device, and is provided with a cutter 410 driven by a hydraulic cylinder to reciprocate the cutter 410. The blade of the cutter 410 is downward, and is reciprocally moved in the up-down direction by the driving of the hydraulic cylinder. Since the cutter 410 is used to cut the wire 600, a moving path of the cutter 410 intersects with a conveying path of the wire 600.

Compared with the prior art, the utility model abandons the existing wire 600 pushing mechanism and the limiting block, and adds the revolute pair driven by the servo motor on the basis of the original roller, and because the servo motor has the characteristics of small electromechanical time constant, high linearity and the like, the electric signal received by the servo motor can be converted into the angular displacement or angular velocity output on the motor shaft, so that the conveying roller assembly 200 can realize high-precision conveying of the wire 600 under the driving of the servo motor, once the wire 600 is conveyed for a preset length, the servo motor pauses the driving, and the cutting device immediately controls the cutter 410 to tangential the wire 600 so as to intercept the fastener blank meeting the size requirement. In addition, the utility model has smaller transformation range of the original cold header and relatively low transformation cost, and is very suitable for old transformation projects of the cold header.

In some embodiments of the present utility model, in order to further increase the contact area with the wire 600 and avoid slippage of the wire 600 due to slippage, the number of the conveying roller assemblies 200 may be two or more, and in this embodiment, the number of the conveying roller assemblies 200 is preferably two, and the two conveying roller assemblies 200 are spaced in the front-rear direction. As shown in fig. 3, the driving gears 222 of the two driving rollers 220 are engaged with the driving gear 310 of the servo motor, and at this time, the driving gears 222 and the driving gear 310 are collectively referred to as a transmission gear assembly 300, so that the servo motor can drive the two driving rollers 220 to rotate simultaneously through the transmission gear assembly 300, thereby achieving the purposes of simplifying the structure and saving the cost.

In some embodiments of the utility model, since the fasteners have different diameters, the wires 600 also have different diameters, and the spacing between the driving roller 220 and the driven roller 210 is adjustable for delivering the wires 600 of different diameters. Specifically, a sliding groove 110 is provided at the top of the feeding frame 100 along the up-down direction, and a sliding block 111 is slidably connected to the sliding groove 110, so that the sliding block 111 can slide up and down along the sliding groove 110. Further, a second bearing 212 carrying the driven shaft 211 is installed in the slider 111 such that the driven roller 210 can slide up and down along with the slider 111.

In order to facilitate the adjustment of the relative position between the slide block 111 and the feeding frame 100, the feeding frame 100 is connected with an adjusting mechanism 500 in the chute 110, the adjusting mechanism 500 comprises a nut block 510 with internal threads and a screw 520 with external threads, the nut block 510 is mounted at the top of the feeding frame 100, the central axis of the internal threads is parallel to the setting direction of the chute 110, the screw 520 is in threaded connection with the nut block 510, the bottom of the screw 520 is fixedly connected with the slide block 111, and the top of the screw 520 extends out of the nut block 510 and is fixedly connected with an adjusting handle 521, so as to facilitate the manual rotation of the screw 520. It should be understood that if the number of the driven rollers 210 is two or more, the number of the sliding grooves 110, the sliding blocks 111 and the adjusting mechanism 500 should be adapted accordingly.

In other embodiments, a drive motor (not shown) may be used in place of the adjustment knob 521 described above to effect motorized adjustment of the position of the follower roller 210. However, the specific structure of the adjusting mechanism 500 is not limited, and it is within the scope of the present utility model to adjust the position of the driven roller 210 by the adjusting mechanism 500, no matter what the structure of the adjusting mechanism 500 is.

When the wire 600 with different diameters needs to be replaced, the operator firstly rotates the adjusting handle 521 of the screw 520 to pull the distance between the driven roller 210 and the driving roller 220, then replaces the wire 600 to be conveyed between the driven roller 210 and the driving roller 220, the lower bottom surface of the wire 600 abuts against the driving roller 220, and then reversely rotates the adjusting handle 521 of the screw 520 to tightly abut the driven roller 210 against the upper surface of the wire 600, so as to complete the replacement of the wire 600.

It should be noted that, since the driving roller 220 is located directly below the driven roller 210, and the position of the driving roller 220 is not changed along with the change of the diameter of the wire 600, the positioning reference of the conveying roller assembly 200 can be always kept on the same horizontal plane, so as to be convenient for docking with other devices.

Because the cold heading die of the cold heading machine can accumulate certain errors after being used for a period of time, even though the feeding system can realize accurate conveying of the wire 600, certain dimensional errors still can exist in finished fastener products after processing. Because the discharge gate of cold heading machine is kept away from its switch board, consequently in order to be convenient for the manual debugging of operator servo motor, servo motor's driver accessible remote control hand wheel (not shown in the figure) is controlled, because the remote control hand wheel embeds with the control module that the driver communicates, consequently the remote control hand wheel can be realized to servo motor's remote control. The remote control hand wheel can be wireless or wire-type and is provided with a plurality of control keys and a plurality of knobs, so that various rotation parameters of the servo motor, such as angular displacement or angular speed, can be adjusted, and errors accumulated by the cold heading die are compensated.

In the manual debugging process, after the cold header finishes machining a group of fasteners, an operator can use a measuring tool to measure the tolerance of the fasteners, and according to the measured tolerance, the operator can directly use the remote control hand wheel to adjust the rotation parameters of the servo motor so as to compensate the accumulated error of the cold header die until the tolerance of the fasteners meets the design requirement. After that, an operator can switch the working mode of the cold header into an automatic mode by using the remote control hand wheel so as to realize automatic production of the cold header.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims (10)

1. Cold header feed system, its characterized in that includes:

a feed rack (100) located between the wire rack and the blank conveying device;

a servo motor mounted to the feed frame (100);

the conveying roller assembly (200) is arranged on the feeding frame (100), the conveying roller assembly (200) comprises a driven roller (210) and a driving roller (220), the driving roller (220) is driven by the servo motor, the driven roller (210) is positioned above the driving roller (220), a conveying channel (201) through which a wire (600) can pass is formed between the driven roller (210) and the driving roller (220), and the conveying roller assembly (200) has a conveying direction for conveying the wire (600) from the wire material frame to the blank conveying device;

and the cutting device is arranged between the conveying roller assembly (200) and the blank conveying device, the cutting device is provided with a cutter (410) capable of moving back and forth, and the conveying channel (201) is positioned on the moving path of the cutter (410).

2. The cold header feed system of claim 1, wherein: the number of the conveying roller assemblies (200) is two, and the two conveying roller assemblies (200) are arranged at intervals along the conveying direction of the wire (600).

3. The cold header feed system of claim 2, wherein: a transmission gear assembly (300) is arranged between the servo motor and the two driving rollers (220), and the servo motor drives the two driving rollers (220) through the transmission gear assembly (300) at the same time.

4. A cold header feed system according to claim 1 or 3, characterized in that: the feeding frame (100) is connected with a sliding block (111) in a sliding mode along the up-down direction, the driven roller (210) is rotationally connected with the sliding block (111), the feeding frame (100) is connected with an adjusting mechanism (500), and the relative position between the sliding block (111) and the feeding frame (100) is limited through the adjusting mechanism (500).

5. The cold header feed system of claim 4, wherein: the adjusting mechanism (500) comprises a nut block (510) and a screw rod (520) which is in threaded connection with the nut block (510), one end of the screw rod (520) is fixedly connected with the sliding block (111), the nut block (510) is fixedly connected with the feeding frame (100), and the setting direction of the screw rod (520) is parallel to the sliding direction of the sliding block (111).

6. The cold header feed system of claim 5, wherein: the other end of the screw rod (520) is connected with an adjusting handle (521).

7. The cold header feed system of claim 5, wherein: the other end of the screw rod (520) is connected with a driving motor.

8. The cold header feed system of claim 1, wherein: the outer peripheral surface of the driving roller (220) and the outer peripheral surface of the driven roller (210) are respectively provided with a first wire feeding groove and a second wire feeding groove.

9. The cold header feed system of claim 1, wherein: the remote control hand wheel is provided with a control module which is communicated with the servo motor.

10. The cold header feed system of claim 1, wherein: the servo motor is a permanent magnet synchronous servo motor.