WO2006133626A1

WO2006133626A1 - Apparatus of feeding sub-blank special for cold-forging forming machine of screw

Info

Publication number: WO2006133626A1
Application number: PCT/CN2006/001146
Authority: WO
Inventors: Junfei Zhong
Original assignee: Junfei Zhong
Priority date: 2005-06-17
Filing date: 2006-05-29
Publication date: 2006-12-21
Also published as: CN1724188A; CN100360258C

Abstract

The present invention provides an apparatus of feeding sub-blank special for cold-forging forming machine of screw which includes a valve holder with a feeding channel whose entrance is on the top surface of the valve holder and whose exit is on the lower end of the valve holder. The difference is in that the exit of said feeding channel is on the lateral of the valve holder. A through hole containing a push rod in it is opposite to said exit. A stop rod linked with said push rod is installed outside the exit. Since the feeding unit is simplified, the whole appliance (apparatus of feeding sub-blank special for cold-forging forming machine of screw) can be manufactured and assembled easily. Simultaneously, the stroke of said blank is shortened and the blank can be directly pushed into fixture, so the continuity of the whole processing operation is improved, and the productive capacity of the whole appliance is also enhanced.

Description

Secondary blank feeding device for special screw cold forging machine

The invention belongs to the technical field of cold forging processing equipment, and particularly relates to a secondary blank feeding device used in a special screw cold forging machine.

Background technique

Commonly used screws consist of a screw and a grooved end face, but in some cases, such as computer desks, executive desks or other modular furniture, more and more use includes some kind of special connection screws, eccentric discs, plastic A connecting device consisting of a nut and the like for the purpose of free disassembly and stable combination. The special connecting screw is generally composed of an end face, a neck portion and a threaded rod portion. The whole is dumbbell-shaped, and the end faces of the two ends and the diameter of the rod portion are relatively large, and the diameter of the middle neck portion is relatively small. A rod that has not yet been threaded is called a semi-finished screw. Among the existing techniques for processing semi-finished screw, several methods are commonly used. One type of cutting method is to first machine the end face groove on the head of the thicker cylindrical blank, and then cut the thin neck by cutting. This type of processing is time consuming, costly, and has low production capacity. A large amount of metal chips are generated during processing, which is a waste of time and pollutes the environment. Another way is the cold forging method. The specific steps are as follows: First, a section of the cylindrical blank is cut, and one end is processed to make a secondary blank having different diameters at both ends, and then the blank is clamped and positioned. The small-diameter end is punched out of the end surface by a punching mechanism (the screw head forming mold), and then the end surface groove is punched out to form a semi-finished screw. Since this method belongs to cold forging processing, there is no waste metal scrap, which saves raw materials and reduces environmental pollution. At the same time, it can automatically complete the punching of the secondary blank end face by using the combined machine tool automation work, and improve the productivity of the semi-finished screw. .

In the above cold forging process, the feeding of the secondary blank is an important process, confirming this Feeding mainly refers to the insertion of the secondary blank from the hopper into the clamping mechanism, waiting for the punching mechanism to punch the small diameter end, and the speed of the secondary blank clamping mechanism directly affects the capacity of the semi-finished screw. . .

The inventors have invented a cold forging processing machine comprising the above technical features, which can quickly complete the feeding of the secondary blanks and the punching of the end faces, thereby achieving the purpose of rapid automated production. The feeding device in the cold forging processing machine has applied for a national patent, and the patent application number is

200410050963. 9 , wherein the storage tank adopts the form of oblique feeding passage, and the clamping mechanism adopts the form of a mold base made of two modules. However, in the above-mentioned cold forging processing machine, the feeding process of the secondary blank from the hopper holding mechanism can be realized by the joint action of several components in the feeding mechanism, and the control mechanism is complicated, so that the whole The structure is complicated to operate, and it is difficult to further shorten the running time, which restricts the further improvement of its production capacity.

Invention disclosure

SUMMARY OF THE INVENTION An object of the present invention is to provide a secondary blank feeding device for a special screw cold forging machine which has a simple structure and can improve the productivity of the whole machine in view of the above-mentioned deficiencies of the prior art.

In order to achieve the above object, the present invention provides a secondary blank feeding device for use in a special screw cold forging machine, comprising a valve seat opening a feed passage, an inlet of the feed passage being located above the valve seat, and an outlet at the valve seat a lower end, the feed channel outlet is located at the side of the wide seat; a through hole is defined in a rear side wall of the valve seat opposite to the outlet, and a top rod is disposed in the through hole; at the outlet of the feed channel On the outside, a stopper bar that is linked with the jack is provided.

Wherein, the axis line of the jack is coincident with the axis of the feed channel outlet.

Wherein, when the bar is extended to the vertex position, the front portion thereof intersects with the axis extension line of the jack. Wherein the close distance between the outer surface of the front portion of the bar and the outer surface of the secondary blank clamping mechanism The distance is 0~3 mm.

The ram and the lever that are interlocked with each other are controlled by the transmission mechanism to reciprocate, and when the ram is extended, the lever is retracted; when the ram is locked, the lever is extended.

Wherein, an automatic conveying secondary blank in-position hopper device is disposed above the inlet of the feed passage, the device comprising a main shaft, a one-way transmission wheel mounted on the main shaft, a groove wheel, a directional wheel and a storage hopper; The diameter of the bottom circle of the groove blank is smaller than the diameter of the circle in the groove wheel groove; the bottom plate of the lower end of the storage hopper wall is provided with a secondary blank outlet; 5度之间之间。 The outlet has a circular arc surface adapted to the outer surface of the inlet channel of the inlet channel; the starting point of the arcuate surface of the rear wall plate is set at a position between 22.5 degrees before and after the vertical center line above the groove wheel.

Wherein, the shape of the groove on the groove wheel is composed of a circular arc line at the bottom and a straight line segment tangential to the circular arc line on both sides.

Wherein, the one-way transmission wheel adopts a flywheel with a one-way clutch; the number of grooves on the groove wheel is equal to the number of chain teeth of the flywheel.

Wherein, an annular guiding tube coaxial with the ejector pin is added at the outlet of the feeding channel.

The beneficial effects of the secondary blank feeding device in the special screw cold forging machine of the present invention are:

1. Simple structure, because the feeding device is simplified, the whole machine (special screw cold forging machine) is easier to manufacture and assemble;

2. Since the working stroke of the secondary blank clamping mechanism is simplified, the secondary blank can be directly pushed into the clamping mechanism from the storage tank, so that the feeding is completed in one step, and the consistency of the whole processing process is improved. Sexuality shortens the time of single processing and increases the production capacity per unit time, thus increasing the capacity of the whole machine. DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view of the installation of an embodiment of the present invention.

Fig. 2 is a schematic view showing the operation of the secondary blank member clamping mechanism in one embodiment of the present invention. Figure 3 is a schematic diagram of the next action of the action shown in Figure 2.

Figure 4 is a schematic diagram of the next action of the action shown in Figure 3.

Figure 5 is a top plan view of the feed passage of Figure 1.

Figure 6 is a schematic illustration of a secondary blank processed in accordance with the present invention.

Figure 7 is a front elevational view of the automatic transfer of the secondary blank in place hopper assembly in one embodiment of the present invention. Figure 8 is a plan view of Figure 7.

Figure 9 is a view taken along the line A-A of Figure 8.

Figure 10 is a B-B direction view of Figure 9. Description of the figure:

2. Feed channel seat 20: Feed channel feed 21: Feed channel inlet 2: Feed channel outlet 23: Jack through hole 25: Ring guide tube

3: Mold base 30: Hollow cylinder 5: Retaining lever

51: Return spring 52: Stopper support 53: Guide hole

54: front of the lever 6: ejector 7: secondary blank

1: Spindle 92: Groove wheel 93: Directional wheel

4: Bearing 95: Left and right side wall panels 96: One-way transmission wheel

7: Storage hopper 98: Base plate 99: The preferred embodiment of the secondary blank exit The invention will now be described in further detail with reference to the drawings and embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view of the installation of an embodiment of the present invention. The utility model comprises a feed channel valve seat 2 with a feed channel 20, a ram 6 which is arranged at a low end of the feed channel and can reciprocate back and forth, and a bar 5 which can be vertically reciprocated on the frame. There is also a device for automatically conveying the secondary blank into the hopper above the inlet of the feed passage 20.

As shown in FIG. 1 and FIG. 5, in one embodiment of the present invention, the valve seat 2 is vertically mounted on the frame of the automatic cold forging machine, and the valve seat 2 is provided with a feeding passage 20 and a feeding passage 20 The shape and size of the cross section is adapted to the shape of the secondary blank 7 (shown in Figure 6); the opening above the valve seat 2 is the inlet 21 of the feed channel, and the lower end of the feed channel seat 2 is closed, at its low The feed channel outlet 22 is open on the side of the end, as shown in Figures 2, 3, and 4.

In conjunction with the embodiment of the present invention, the secondary blank clamping mechanism adopts a die base structure, and the die base 3 includes two modules, and the inner side surfaces of each module are provided with an arc-shaped step groove corresponding to the shape of the secondary blank, and when the two modules are closed , a hollow cylinder 30 with steps is formed. The machining positioning of the secondary blanks is mainly done in the hollow cylinder 30.

In this embodiment, at the rear side wall of the valve seat 2, a through hole 23 is formed at a position opposite to the outlet 22, the diameter of which is smaller than the diameter of the rear end of the secondary blank; and the through hole 23 is provided with a horizontally reciprocable ram. 6. The ram 6 is opposite to the feed passage outlet 22, and the hollow cylinder 30 in the mold base 3 is also opposite to the feed passage outlet 22; when the ram 6 is advanced, the secondary blank 7 at the lower end of the feed passage is passed The outlet 22 pushes out the feed passage and is pushed into the hollow cylinder 30 of the die holder until the shoulder of the secondary blank 7 abuts the step in the hollow cylinder 30; the axial center of the plunger 6 and the axis of the feed passage outlet 22 The axial line of the hollow cylinder 30 in the wire and the mold base 3 coincides, so that the secondary blank 7 can be instantaneously completed from the hopper to the clamping mechanism. In place; that is, from the lower end of the feed passage into the hollow cylinder 30 of the die holder 3.

In this embodiment, an annular guide tube 25 is added between the feed passage outlet 22 and the mold base hollow cylinder 30, which increases the accuracy of the secondary blank member from the outlet of the feed passage 20 into the hollow cylinder 30 of the mold base. .

As shown in FIG. 1 and FIG. 2, in this embodiment, the bar 5 which can reciprocate up and down is positioned by the bar support 52, vertically mounted on the frame of the cold forging machine, and the bar is downwardly passed through the block. The guide hole 53 of the rod holder 52 is provided with a return spring 51 at the upper portion of the stopper rod, and the tail portion thereof is connected with the transmission mechanism, and the movement line of the stopper rod intersects the axis line of the hollow cylinder 30 formed by the two modules in the mold base 3. When the blocking lever 5 is moved downward to the lower position, the outer surface of the lower portion 54 of the blocking rod is adjacent to the outer surface of the die holder 3, and the close distance may be between 0 and 3 mm, since the blank member 7 enters the hollow cylinder 30 of the die holder 3 There is a small section at the rear end to expose the die holder, so that the lower part 54 of the bar will abut against the rear end of the secondary blank 7, which can block the secondary blank 7 from snaking under the action of the force and exit the die holder.

In this embodiment, the jack 6 and the lever 5 are controlled by the same transmission structure and interlocked with each other.

Figure 2, Figure 3, and Figure 4 show the action of the ram 6 and the bar 5 interlocking during a machining cycle.

Fig. 2 is a schematic view showing the operation of the secondary blank in place clamping mechanism, and the jack 6 is ready to extend forward and the stopper 5 is ready to be lifted. When the ejector 6 is extended, the secondary blank Ί at the lower end of the feeding passage is pushed forward, and the stopper 5 is lifted, and the ram 6 can offset the shoulder of the secondary blank 7 with the step in the hollow cylinder 30. .

When the secondary blank 7 is in place, the ram 6 is immediately rear-locked and the stop 5 is then lowered, with its front end 54 resting against the rear end of the secondary blank 7, while blocking the passage of the next blank into the mold base. Figure 4 Shown is the illustration of the next action shown in Figure 3, with the stop bar 5 falling against the rear end of the secondary blank 7.

The apparatus for automatically conveying the secondary blank in the hopper according to an embodiment of the present invention includes a main shaft 91, a one-way transmission wheel 96 mounted on the main shaft, a storage hopper 97, and a storage hopper as shown in Figs. Groove wheel 92 and directional wheel 93, which are fixed side by side in the main shaft 97, are mounted below the hopper 97 and have a bottom plate 98 of the blank outlet 99.

In this embodiment, the secondary blank hopper 97 is surrounded by four front, rear, left and right panels; the main shaft passes through the bearing 94 on the left and right side wall panels 95, and the segments and the secondary blanks are located. The groove of the groove wheel 92 and the directional wheel 93 arranged side by side in the hopper 97 is the front, rear, left and right walls of the secondary blank hopper 97 on the front upper surface of the groove wheel 92 and the directional wheel 93. The inner surface of the plate; the one-way transmission wheel 96 is a flywheel with a one-way clutch fixedly mounted on the main shaft outside the hopper 97. The grooves on the groove wheel 92 are axially evenly distributed along the circumference, and the outer diameter of the directional wheel 93 is larger than the diameter of the groove bottom circle and smaller than the diameter of the circle in the groove wheel groove. The shape of the groove on the groove wheel 92 is composed of a circular arc line at the bottom and a straight line segment tangential to the circular arc line on both sides. The number of grooves on the groove wheel is equal to the number of teeth of the flywheel chain. The bottom plate 98 below the groove wheel 92 and the directional wheel 93 is fixedly coupled to the lower end faces of the four wall plates of the hopper 97. The bottom plate 98 has a secondary blank outlet 99, a secondary blank outlet 99 and a feed passage. The shape and size of the inlet 21 correspond.

9 and 10 further illustrate the structure of the automatic transmission secondary blank in-position hopper device; in the middle portion of the main shaft 91, the groove wheel 92 and the directional wheel 93 are fixed side by side by a keyway connection, and the groove on the groove wheel 92 is concave. The axial direction of the groove is evenly distributed along the circumference, and the outer diameter of the directional wheel 93 is larger than the diameter of the bottom circle of the groove wheel 92 and smaller than the diameter of the circle in the groove of the groove wheel 92 (for the sake of clarity, the cross section of the groove wheel is not hatched) The main shaft 91 is supported on the left by two bearings 94 mounted on the outside of the groove wheel 92 and the directional wheel 93. On the right wall plate 95, a flywheel 96 with a one-way clutch is fixedly mounted on a main shaft 91 extending from one side of the side wall plate, and inner side faces of the front wall plate and the rear wall plate are provided with a groove top of the groove wheel 92 The circular arc surface corresponding to the circular surface, the gap between the outer circular surface of the groove top groove 92 and the arc surface of the rear wall plate and the arc surface of the front wall plate should be small and not large, and no sliding friction can be generated. The starting point of the arcuate surface of the rear wall plate is disposed on the front upper side of the surface of the groove wheel 92 and the directional wheel 93, and is a secondary blank hopper 97 surrounded by the inner surfaces of the front, rear, left and right panels. Below the grooving wheel 92 and the directional wheel 93, a strip of secondary blank exit 99 is formed in the bottom plate 98. The bottom plate 98 sits above the inlet of the feed channel 20.

In the present invention, the working principle of automatically conveying the secondary blank into the hopper device is shown in Fig. 9 and Fig. 10. The secondary blank is placed in the secondary blank storage hopper according to the specified direction, and the flywheel on the main shaft 91 is continuously driven by the chain at a constant speed. Or driven by the reciprocating oscillating transmission, the groove wheel 92 and the directional wheel 93 on the main shaft are uniformly rotated in a single direction from the starting point of the arc surface of the front upper rear wall plate, and the groove of the groove wheel 92 accommodates the large blank piece. In the diameter section, the outer surface of the directional wheel 93 accommodates the small diameter section of the secondary blank, and the secondary blank passes through the groove wheel 92 and the directional wheel 93 smoothly through the starting point of the arc surface of the rear wall, and falls from the exit of the secondary blank. Enter the inlet of the feed channel 20. As the groove wheel 92 and the directional wheel 93 continue to rotate, more of the blank member enters the groove and the outer surface of the directional wheel, thereby achieving an oriented, ordered, continuous transfer of the secondary blank. On the other hand, when the secondary blank is misaligned, the large diameter of the secondary blank is blocked at the starting point of the circular arc of the rear wall and cannot pass, thereby ensuring the directional conveyance of the secondary blank.

In the embodiment of the present invention, the rear end of the ram 6 and the blocking lever 5 are respectively connected with the transmission mechanism of the automatic cold forging machine. Similarly, the one-way transmission wheel 96 for automatically conveying the secondary blank into the hopper device is also automatically The corresponding transmission mechanism of the cold forging machine is controlled.

The working process of the present invention is described as follows: After the secondary blank 7 is placed in the storage hopper 97 of the automatic conveying blank in the hopper device in a predetermined direction, the flywheel on the main shaft 91 is driven by the chain continuous speed transmission or the reciprocating oscillating transmission, so that the concave on the main shaft The groove wheel 92 and the directional wheel 93 are swung in a single direction from the starting point of the arc surface of the front upper rear plate, and the groove of the groove wheel 92 accommodates the large diameter section of the secondary blank, and the outer surface of the directional wheel 93 The small diameter section of the secondary blank is accommodated, and the secondary blank passes from the secondary blank exit 99 as the groove wheel 92 and the directional wheel 93 smoothly pass through the starting point of the arcuate face of the rear wall, and enters the feed passage 20.

The feed channel 20 is actually a hopper. After the secondary blank 7 enters the feed channel 20, it is arranged in sequence. The minor blank 7 at the lowest end of the feed channel is opposite the channel outlet 22, the large diameter end. The rear end faces the head of the jack 6 that is seated in the valve seat 2.

Before the transmission mechanism is operated, the ejector pin 6 is at the apex of the retraction, and its head is in the ejector hole 23; the ram 5 is at the forward apex position, and the head thereof intersects with the axial extension of the ejector 6.

When the transmission structure is working, the bar 5 is lifted from the low position, the jack 6 is extended, and the primary blank 7 is pushed, and the annular guide tube 25 is inserted into the hollow cylinder 30 formed by the two die blocks in the die holder 3. Until the shoulder of the secondary blank 7 bears against the convex step of the hollow cylinder 30; then, the ram 6 is retracted, and the stopper 5 is simultaneously dropped, and when it is lowered, the lower portion 54 abuts against the rear end of the blank 7 (large diameter end) , the secondary blank 7 is prevented from axially swaying; after the secondary blank 7 is processed by the feeding mechanism, after the semi-finished screw is made, the stopper 5 is lifted, the ram 6 is extended, and at the same time, the two modules in the die holder 3 are completed. Parting (semi-finished screw exit), clamping (forming hollow cylinder 30); such a cyclic action, continuous feeding, and continuous cold forging processing.

The above is a preferred embodiment of the present invention. According to the disclosure of the present invention, some similarities and alternatives that can be clearly conceived by those skilled in the art should fall within the protection of the present invention. - ]0-

Range of protection.

Industrial application

Claims

Claim

1. A secondary blank feeding device for a special screw cold forging machine, comprising a wide seat (2) for opening a feed passage, an inlet (21) of the feed passage above the valve seat, an outlet (22) Located at the lower end of the valve seat, the feed passage outlet (22) is located at a side of the valve seat (2); and a through hole is formed at a rear side wall of the valve seat opposite to the outlet (22) ( 23), the through hole (23) is provided with a jack (6); outside the outlet of the feed channel (22), a bar (5) associated with the jack (6) is disposed.

2. A secondary blank feeding device for use in a special screw cold forging machine according to claim 1, characterized in that the axial line of the jack (6) and the feed passage outlet (22) The axis of the axis coincides.

A secondary blank feeding device for use in a special screw cold forging machine according to claim 1, wherein said front portion (54) when said blocking lever (5) is extended to an apex position Intersect with the axis extension of the ram (6).

The secondary blank feeding device for a special screw cold forging machine according to claim 3, wherein the outer surface of the front portion of the blocking lever (5) and the secondary blank clamping mechanism are externally The close distance between the surfaces is 0 to 3 mm.

5. The secondary blank feeding device for a special screw cold forging machine according to claim 1, wherein the interlocking ejector (6) and the blocking lever (5) are controlled by the transmission mechanism to reciprocate Movement, when the jack (6) is extended, the lever (5) is retracted; when the jack (6) is locked, the lever (5) is extended.

6. The secondary hair used in a special screw cold forging machine according to any one of claims 1 to 5. A blank feeding device, characterized in that an automatic conveying secondary blank in-position hopper device is arranged above the inlet (21) of the feed channel, the device comprising a spindle (91) mounted on the spindle (91) a one-way transmission wheel (96), a groove wheel (92), a directional wheel (93) and a storage hopper (97); a spindle on the outer side of the secondary blank storage hopper (97); the groove wheel (92) The diameter of the bottom circle of the groove is smaller than the diameter of the circle in the groove of the groove wheel (92); the bottom plate (98) fixed to the lower end of the wall of the storage hopper (97) is provided with a secondary blank outlet (99); (99) having a circular arc surface adapted to the outer circular surface of the inlet (21) of the feed passage; the starting point of the circular arc surface of the rear wall is set between 22.5 degrees before and after the vertical center line above the groove wheel (92) position.

A secondary blank feeding device for use in a special screw cold forging machine according to claim 6, wherein the groove shape on the groove wheel (92) is formed by a circular arc at the bottom and It consists of straight segments on both sides that are tangent to the circular arc.

A secondary blank feeding device for use in a special screw cold forging machine according to claim 6, wherein said one-way transmission wheel (96) employs a flywheel with a one-way clutch; The number of grooves on the groove wheel (92) is equal to the number of teeth of the flywheel.

9. A secondary blank feeding device for use in a special screw cold forging machine according to claim 6, characterized in that a section of the feed passage outlet (22) is coaxial with the ram (6) Annular guide tube (25) of the heart line.