MXPA05007685A - Forming machine having improved transmission mechanisms. - Google Patents

Abstract

A forming machine includes a first transmission mechanism connected to a cutting mechanism and a conveying clamp mechanism, a drive mechanism for driving the first transmission mechanism; and a second transmission mechanism driven by the drive mechanism for driving a feeding mechanism. The second transmission mechanism includes a driven wheel driven by the drive mechanism, a first swing member connected to the feeding mechanism and confronting the driven wheel, an eccentric pin projecting axially from the driven wheel and connected slidably to the first swing member. The eccentric pin slides relative to the first swing member while rotating along with the driven wheel so that the first swing member is swung to and fro in a cycle motion and completes one cycle for each revolution of the eccentric pin.

Description

FORMING MACHINE THAT HAS IMPROVED TRANSMISSION MECHANISMS FIELD OF THE INVENTION This invention relates to a forming machine, more particularly to a forming machine for producing forged products.

BACKGROUND OF THE INVENTION A forming machine for producing forged products for producing forged products typically includes a feeding mechanism for feeding a wire material to a cutting mechanism for cutting the wire material into wire sections, which are supplied to a die assembly through of a mechanism of transport clamps. The forming machine further includes a drive mechanism which drives the cutting mechanism and the transport clamp mechanism through a first transmission mechanism, and which also drives the feed mechanism through a second transmission mechanism. The first transmission mechanism includes a cam mechanism having eccentric plates for camming respectively the cutting mechanism and the transport clamp mechanism, so that the cutting mechanism and the transport clamp mechanism are operated intermittently to carry out their cutting and supply actions, respectively. The second transmission mechanism includes a driven gear driven by a drive gear of the drive mechanism, and a hinge connected to and swung by the driven gear. The feeding mechanism is driven by the joint, and advances the wire material in an intermittent manner. The intermittent advance of the wire material by the feeding mechanism is arranged to alternate with the cutting action of the cutting mechanism and the supply action of the transport clamp mechanism. To intermittently advance the wire material, the articulation of the second transmission mechanism is moved back and forth by the driven gear. When the driven gear rotates 180 degrees, the joint moves forward to drive the feed mechanism, so that the wire material is advanced. As the feeding mechanism is actuated, the cutting mechanism and the transport clamp mechanism temporarily stop the cutting action and the advancing action, respectively. When the driven gear rotates an additional 180 degrees, the articulation moves backward so that the feed mechanism temporarily stops the advance of the wire material. At this time, the cutting mechanism and the transport clamp mechanism perform the cutting and advancing actions, respectively. Thus, the ratio of the frequency of the advance of the wire material to the cutting and supply of the cut wire sections is 1: 1. In order to increase the speed of such a forming machine, attempts have been made to increase the speed of rotation of the driving gear and the driven gear. However, this increases the speed of the reciprocating movement of the eccentric plates, thereby resulting in increased impacts between each eccentric plate and one of the cutting mechanism and the transport clamp mechanism. The forces of increased impact tend to produce considerable vibrations in the forming machine, thereby increasing the incidence of damage to the machine components.

BRIEF DESCRIPTION OF THE INVENTION An object of the present invention is to provide a forming machine with improved transmission mechanisms for a feeding mechanism, a cutting mechanism and a transport clamp mechanism. According to this invention, a forming machine that includes a die assembly, comprises: a cutting mechanism adapted to cut a feed material; a transport clamp mechanism adapted to supply a cut section of the feed material from the cutting mechanism to the die assembly; a feeding mechanism adapted to advance the feed material to the cutting mechanism; a first transmission mechanism connected to the cutting mechanism and to the mechanism of transport clamps; a drive mechanism that drives the first transmission mechanism; and a second transmission mechanism actuated by the drive mechanism to drive the feed mechanism. The second transmission mechanism includes a driven wheel, driven by the drive mechanism, a first oscillating member connected to the feed mechanism and opposite the driven wheel, and an eccentric pin projecting axially from the driven wheel, and slidably connected. to the first oscillating member. The eccentric pin slides relative to the first oscillating member while rotating together with the driven wheel, so that the first oscillating member rotates back and forth in a cyclic motion and completes a cycle for each revolution of the eccentric pin.

BRIEF DESCRIPTION OF THE DRAWINGS Other features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiments of the invention, with reference to the accompanying drawings, in which: Figure 1 is a fragmentary elevation view of the first preferred embodiment of the present invention: Figure 2 is the same view as in Figure 1, but with a first swiveling plate rotated rearwardly; Figure 3 is a fragmentary plan view of the first preferred embodiment; Figure 4 is another fragmentary plan view of the first preferred embodiment; Figure 5 is a fragmentary view showing the first oscillating plate and a driven gear of the first embodiment; and Figure 6 is a fragmented elevation view of the second preferred embodiment of the invention.

DETAILED DESCRIPTION OF THE PREFERRED MODALITIES Before the present invention is described in more detail, it should be noted that the same reference numerals have been used to denote similar elements throughout the specification. Referring to Figure 1, a first preferred embodiment of the present invention includes a housing 3, a feeding mechanism 4 positioned on the front of the housing 3. In the housing 3, an actuation mechanism 61, a first mechanism of transmission 51, a cutting mechanism 52, a transport clamp mechanism 53 and a second transmission mechanism 62. The housing 3 includes a base 31, which extends in a direction from the front to the rear of the housing 3, a machine body 32 mounted on the base 31 within the housing 3 to support a forging mechanism (not shown), and a die assembly (not shown), and a fixed pivot support 33 mounted on the base 31 in the left side of the body of the machine 32. The feeding mechanism 4 is provided for advancing a feed material (eg, wire) 30 in a direction from the front to the back ior. The feed mechanism 4 includes two transmission gears 411 engaged with two lower transmission gears 411 and a sector-shaped driving gear 412 meshed with the lower transmission gears 411. The upper and lower transmission gears 4 1 are connected coaxially and respectively four upper and lower feed rollers (not shown), for tightening the feed material 30 between them. The wire material 30 is advanced between the upper and lower feed rollers (not shown). Since the constructions of the base 31, the body of the machine 32 and the feeding mechanism 4 are known, they are not detailed hereinafter. Referring to Figures 2-4, the cutting mechanism 52 and the transport clamp mechanism 53 are provided for cutting the feed material 30 and for transporting and supplying the cut sections of the feed material 30 to the next processing station. , that is, a die assembly (not shown). The cutting mechanism 52 is positioned at a level below the transport clamp mechanism 53. The first transmission mechanism 51 is a cam mechanism having a sliding plate 511 substantially vertical, which is slidably mounted to the body of the cam. the machine 32 in the direction from the front to the rear, a first eccentric plate 512 mounted on the slide plate 511 and opposite the cutting mechanism 52, and a second eccentric plate 536 mounted on the slide plate 511 above of the eccentric first plate 512 and opposite the transport clamp mechanism 53. The first and second eccentric plates 512 and 516 are used to drive the cutting mechanism 52 and the transport clamp mechanism 53, respectively. The eccentric first plate 512 has a first flat face section 513, a second flat face section 515, and a first inclined surface 514 between the first and second flat face sections 3 3 and 5 5. The second eccentric plate 516 includes a toothed part defining a second inclined surface 517, and third and fourth flat face sections 518, 519, formed respectively on two sides of the second inclined surfaces 517. Since the constructions of the first transmission mechanism 51, the cutting mechanism 52 and the mechanism of transport clamps 53 are known in the art, details of which are omitted herein for simplicity. Referring to Figure 5, in combination with Figures 1 and 2, the drive mechanism 61 includes a drive gear 611 driven by a power unit (not shown), and a crank 612, which includes a front end connected to the plate of vertical slip 511 in the first drive mechanism 51 and a rear end pivoted eccentrically to the drive gear 61, so that the crank 612 is driven by the drive gear 611 and oscillates the slide plate 511. The second drive mechanism transmission 62 includes a reverse gear 621 engaged with the driving gear 61, a driven wheel in the form of a driven gear 622 engaging the reverse gear 621, an eccentric pin 623 eccentrically connected to the driven gear 622, a first oscillating member 63 connected to the eccentric bolt 623, and an oscillating unit 64 connected to the first oscillating member 63. The oscillating unit 64 includes e a first connecting rod 641 connected to the first oscillating member 63, a length adjusting unit 642 movably mounted on the body of the machine 32 and connected to the first connecting rod 641, and a second connecting rod 644 connected to the length adjusting unit 642. The length adjusting unit 642 has an elongated adjustment hole 643. A connecting end of the second connecting rod 644 is slidably connected to the adjustment hole 643. A The front end of the second connecting rod 644 is connected to a second oscillating member 413. The second oscillating member 413 is placed coaxially with the driving wheel in the form of sector 412 for synchronous movement. The position of the connecting end of the second connecting rod 644 in the adjustment hole 643 can be changed to adjust the total length of the oscillating unit 64 (the sum of the lengths of the first and second connecting rods 641, 644 plus the length of a portion of the length adjustment unit 642). Therefore, the angle of rotation of the second oscillating member 413 can be changed to adjust the length of the feed material 30 that is advanced by the feed mechanism 4. When a lower end of the length adjustment 642 is rotated backward by the first connecting rod 641, the driving wheel in the form of sector 412, rotates in the counterclockwise direction, so that the feeding rollers (not shown), connected to the transmission gears 411 rotate and advance the supply material 30. The first oscillating member 63 includes an elongated oscillating plate 631 with a bottom end that is pivotally attached to the pivot bearing 33 to rotate about a pivot shaft 635. The pivot shaft 635 is substantially parallel to the shaft of the driven gear 623, and the oscillating plate 631 is opposite the driven gear 623. An elongated through hole 632 is formed in the oscillating plate 631, and a b Slider 633 is mounted within the through hole 632 to slide along the through hole 632. The eccentric pin 623 of the driven gear 622 is rotatably connected to the slide block 633. The first connecting rod 641 is rotatably connected to the plate oscillating 631. In operation, when the driving gear 611 of the first transmission mechanism 61 rotates counterclockwise, the crank 612 moves the slide plate 511 forward, so that the cutting mechanism 52 and the clamping mechanism are actuated. 53. Simultaneously, the reverse gear 621 moves clockwise, and the driven gear 622 rotates counterclockwise. In addition, the eccentric bolt 623 rotates about the axis 620 of the driven gear 622 and moves the sliding block 633. The sliding block 633 therefore slides into the through hole 632 of the oscillating plate 631. According to the sliding block 633 moving, the oscillating plate 631 of the first oscillating member 63 rotates forward to a first position, as shown in Figure 4 and back to a second position as shown in Figure 5. Since the first oscillating member 63 rotates about the pivot axis 630 positioned below the axis 620 of the driven gear 622, and since the position of the pivot shaft 630 of the first oscillating member 63 is further forward than the axis 620 of the driven gear 622 (ie, the pivot shaft 630) it is not aligned with the axis 620 along a vertical line and is located forward of the vertical line), the turning angle T1 of the eccentric pin 623, which rotates in the direction of counter clockwise and backward, to oscillate the first oscillating member 63 from the first position (Figure 1) to the second position (Figure 2) is less than 180 degrees. When the first oscillating member 63 rotates back to the second position, as shown in Figure 2, the first oscillating member 63 pulls the first connecting rod 641 backward, so that the bottom end of the adjusting member 42 moves back. The second oscillating member 413 therefore rotates the driven gear in the form of sector 412 of the feed mechanism, in the counterclockwise direction, thereby driving the feeding mechanism to advance feed material 30. At that time, the crank 6 2 of the first transmission mechanism 61 pulls the slide plate 511 backward, so that the cutting mechanism 52 does not cut the wire material 30, and the transport clamp mechanism 53 does not supply the cut sections of the feedstock 30. When the first rocking member 63 rotates from the second position to the first position, the eccentric bolt 623 rotates counterclockwise by an angle T2 that is equal to 360 degrees - T1 , and which is greater than 180 degrees. At this time, the feeding mechanism 4 does not advance the feed material 30. However, the first transmission mechanism 51 moves the slide plate 51 forward and drives the cutting mechanism 52 and the transport clamp mechanism 53 for cutting the feed material 30 and for supplying the cut section of the feed material 30 to the die assembly (not shown), respectively. As mentioned above, when the eccentric bolt 623 rotates together with the driven gear 622, the first oscillating member 63 is oscillated by the eccentric pin 623, so that the first oscillating member 63 moves back and forth in a cyclic movement and completes a cycle of the cyclic movement by each revolution of the eccentric pin 623. The first oscillating member 63 executes a first running motion (from the first position to the second position of the first oscillating member 63), and a second running movement (the second position to the first position) in a cycle of its cyclic movement. The eccentric bolt 623 rotates a first angle T1 for the first movement of the run of the first oscillating member 63 and a second angle T2 for the second movement of the run. The first angle T1 is smaller than the second angle T2. In this mode, T1 equals 140 degrees, while T2 equals 220 degrees. Thus, the eccentric bolt 623 of the driven gear 622 rotates in an anti-clockwise direction at an angle of 140 degrees to drive the feed mechanism 4 to advance the feed material 30 once. Since the time taken by the eccentric bolt 623 to rotate 140 degrees is less than that to rotate 220 degrees, the time required by the feed mechanism to advance the feed material 30 is reduced, compared to the time taken to stop the advance of the feed material 30. Therefore, the time provided for the cutting mechanism 52 and the transport clamp mechanism 53 to perform their respective cutting and feeding actions may be increased. Referring once again to Figures 2 to 4, since the time necessary to activate the cutting mechanism 52 and the transport clamp mechanism 53 has been prolonged, the first and second inclined surfaces 514, 517 of the first and second eccentric plates 512, 516, can be increased in length, so that the angles of the slope thereof can be increased, thereby reducing the pressure induced in the first and second eccentric plates 512, 516, during their cams disposition actions. Therefore, when the driving gear 611 is accelerated in order to increase the production speed of the forming machine, the vibration movements can be reduced. Referring to Figure 6, a second preferred embodiment of the present invention is shown. In the second embodiment, the feeding mechanism 4 'includes an upper driven gear in the form of sector 411', and a lower driving gear in the form of sector 412, which are meshed with each other, and which are connected coaxially and respectively to a pair of feed rollers (not shown) for tightening the feed material 30 between them, for feeding. When the sector-shaped lower gear 412 rotates clockwise, the feed material 30 is advanced towards the cutting mechanism 52. The direction of the drive gear in the form of sector 412 for advancing the material feed 30 in this mode, is opposite to that of drive gear 412 in the first mode. In addition, the direction of the driven gear 622 'to drive the first oscillating member 63, is opposite to that of the driven gear 622 in the first embodiment. No reverse gear is provided in this embodiment, and the driven gear 622 'is directly engaged with the driving gear 611. Thus, when the driving gear 611 rotates counterclockwise, the driven gear 622' rotates in the clockwise direction. The first oscillating member 63 includes an elongated oscillating plate 631. The eccentric pin 623 of the driven gear 622 'is directly connected to the sliding block 633 in the through hole 632 of the oscillating plate 631. The oscillating plate 631 has a bottom end mounted on pivot directly to the left side of the body of the machine 32. The length adjusting member 642 is fixed directly to a front side of the oscillating plate 631, so that the length adjusting member 642 oscillates in a synchronized manner with the oscillating plate 631.

Therefore, when the driven gear 622 'is driven by the driving gear 611 to rotate clockwise, the oscillating plate 631 rotates from the first position to the second position, and the drive gear in the form of a sector 412 rotates counterclockwise, so that the feeding mechanism 4 'does not advance the feed material 30. At this time, the cutting mechanism 52 and the transport clamp mechanism 53 are activated for perform their respective cutting and supply actions. When the driven gear 622 'continues to rotate, the oscillating plate 631 rotates from the second position to the first position, and the sector-shaped driving gear 412 rotates clockwise, so that the feed material 30 it is advanced. In this embodiment, the position of the pivot shaft 630 of the oscillating plate 631 is also further ahead than the axis 620 'of the driven gear 622'. Although the present invention has been described in relation to what is considered to be the most practical and preferred modalities, it will be understood that this invention is not limited to the described modalities, but is intended to cover several provisions included within the spirit and scope of the most important interpretations. broad and the equivalent provisions.

Claims (6)

NOVELTY OF THE INVENTION CLAIMS

1. - A forming machine including a die assembly, comprising, a cutting mechanism adapted to cut a feed material, a transport clamp mechanism adapted to supply a cut section of the feed material from the cutting mechanism to the assembly of die, a feeding mechanism adapted to advance the feed material to the cutting mechanism, a first transmission mechanism connected to the cutting mechanism and the transport clamp mechanism, a driving mechanism that drives the first transmission mechanism, and a second transmission mechanism driven by the drive mechanism, to drive the feed mechanism, the second transmission mechanism comprises: a wheel driven by the drive mechanism, a first oscillating member connected to the feed mechanism and opposite the driven wheel , and an eccentric pin that protrudes axially from the driven wheel and slidably connected to the first oscillating member, the eccentric pin slides relative to the first oscillating member, while rotating together with the driven wheel, so that the first oscillating member rotates back and forth in a cyclic movement and complete a cycle for each revolution of the eccentric bolt.

2. - The forming machine in accordance with the claim 1, further characterized in that the first oscillating member 63 has an elongated oscillating plate opposite the driven wheel and has an elongated through hole, the eccentric pin is slidably connected to the through hole, the oscillating plate has a pivot axis which is substantially parallel to an axis of the driven wheel.

3. - The forming machine according to claim 2, further characterized in that the oscillating plate further has a sliding block, slidably positioned in the through hole, the eccentric pin is connected to the sliding block.

4. - The forming machine in accordance with the claim 2, further characterized in that the driven wheel is a driven gear, which is driven by the drive mechanism, the second drive mechanism further includes an oscillating unit connected to the first swing member and the feed mechanism.

5. - The forming machine according to claim 4, further characterized in that the drive mechanism includes a drive gear to drive the driven gear, and a crank connected to the drive gear and the first transmission mechanism.

6. - The forming machine according to claim 4, further characterized in that the first oscillating member executes a first running movement and a second running movement in a cycle, the eccentric pin rotates a first angle for the first running movement and a second angle for the second running motion, the first angle is smaller than the second angle.