KR20230088570A - Roller guide for press - Google Patents

Abstract

The present invention relates to a servo press, in which a slide for press-processing a workpiece at the top of a bolster can stably and precisely move up and down, wherein a roller guide is applied to guide the slide up and down, causing noise. of the slide protector cylinder, which is a safety device provided at the end of the connecting rod coupled to the crankshaft, and minimizes the Provided is a servo press with an improved coupling structure.

Description

Roller guide for press {ROLLER GUIDE FOR PRESS}

The present invention relates to a roller guide for a press, and more particularly, to a roller guide for a press capable of precisely moving a slide up and down as well as minimizing noise generation when a slide of a press is raised and lowered.

In general, presses are widely used in molding and processing of materials by plastic deformation, and are used in the production of various containers, ornaments, furniture, structures such as automobiles, aircraft, ships, buildings, and electric parts using plate materials.

In particular, presses can be mass-produced, there are many types, and they have been improved to high-speed and large-capacity, so they are now treated as important machine tools. You can take full advantage of it.

In this way, the press is a device that produces products by pressurizing the workpiece supplied to the top of the lower mold while the upper mold rises and lowers to produce the product, such as crank press, crankless press, knuckle press, link press, etc. Various types of presses have been developed and used.

On the other hand, in general presses, it is difficult to produce various products due to limitations in structure and control relationship, and it is difficult to cope with weight reduction and high rigidity of materials due to changes in the press market, so servo presses are newly developed and used.

This servo press is a device for producing a product by pressing a workpiece by lifting a slide provided on the upper part of a bolster provided on a frame using the power of a servomotor. 1), etc. have been suggested.

Reference 1 relates to a uniform load distribution type servo press and a control method thereof, the servo press of which includes a bolster on which a workpiece is located; a slide that presses the workpiece at the top of the bolster and has a uniform fluid layer formed therein; and a driving unit including first and second driving units for transporting the slide in the vertical direction.

Here, the drive unit of Reference 1 is composed of first and second drive units including a servo motor, a drive shaft, a pinion gear, a spur gear, an eccentric rotation shaft, a crank shaft, and an extension shaft.

In addition, the eccentric rotation shaft has a structure that functions to elevate the crankshaft and the extension shaft to maintain a stable support state, but no specific structure has been proposed for this.

In addition, the slide of Reference 1 is moved up and down along the frame part according to the elevation of the crankshaft and extension shaft up and down. not presented

Of course, as a prior art related to the elevating structure of such a slide, Registration Patent No. 10-1030074 (Reference 2) and the like have been proposed.

Reference 2 relates to a slide guide device of a press. In the slide guide device of a press, the slide guide device is composed of a liner formed on a slide and a gib formed on a frame of a press, wherein any one of the liner and the gib One side or both sides are formed of a double structure of sintered alloy and common metal, and the liner has an oil groove formed of a plurality of circles and a connection groove formed between the circles and connecting them, and at the top of the oil groove It is characterized in that an oil supply hole for supplying oil is formed.

However, the slide guide device of Reference 2 requires lubrication through oil supply in the gib part, so the structure is complicated and maintenance is difficult, and a gap is generated between the liner and the gib, so noise is large when the slide is moved up and down. Precise lifting and lowering is also impossible.

In addition, the slide guide device of Reference 2 has a high risk of breakage of the liner as well as seizure of the liner due to heat generation of the base portion.

Reference 1: Registered Patent No. 10-1407407 Reference 2: Registered Patent No. 10-1030074

Accordingly, the present invention is to solve these problems, and an object of the present invention is to provide a press roller guide in which a slide for press processing a workpiece at the top of a bolster can stably and precisely move up and down.

Particularly, an object of the present invention is to provide a roller guide for a press capable of precisely lifting a slide up and down as well as minimizing noise generation by applying a roller guide to guide the elevation of a slide.

The present invention to solve such a technical problem;

Provided is a roller guide for a press, characterized in that a roller guide for guiding by being in close contact with a gib plate provided inside the frame is formed on the side of the slide body of the press, which includes a drive unit, a bolster, and a slide.

In addition, the roller guide includes a roller housing having a roller seating portion formed therein and having an open front end, a guide roller mounted inside the roller housing, and an eccentric shaft in which the guide roller freely rotates and is supported by the roller housing. It is characterized by including.

In addition, an eccentric shaft support hole for supporting the eccentric shaft is formed in the first half of the roller housing, and a bolt support hole for supporting a second fixing bolt is formed in the second half of the roller housing. The eccentric shaft has a support hole formed in the longitudinal direction, and a first fixing bolt is formed through it, and a head is formed at one end of a cylindrical body fitted into the eccentric shaft support hole of the roller housing, and the cylindrical body is fitted into the shaft hole of the guide roller. It is characterized in that the eccentric portion is formed.

In addition, a bolt support groove capable of supporting the bolt head of the first fixing bolt is formed in the center of the head of the eccentric shaft, and an index hole capable of confirming the location is formed on one side of the end surface of the head, and the circumferential surface of the head It is characterized in that the gripping surface is formed.

In addition, the gripping surface is characterized in that two or more places are formed.

According to the present invention, a roller guide that adheres to and guides the gib plate provided inside the frame part is mounted on the slide that moves up and down by receiving the power of the drive unit, thereby improving maintainability through lubrication-free operation and zero clearance (ZERO). ), there is an effect of reducing noise and improving precision when the slide is raised and lowered.

1 is a front perspective view of a press to which a roller guide for a press according to the present invention is applied.
2 is a rear perspective view of a press to which a roller guide for a press according to the present invention is applied.
3 is a view showing a drive unit of a press to which a roller guide for a press according to the present invention is applied.
4 is a view showing a slide of a press to which a roller guide for a press according to the present invention is applied.
Figure 5 (a) and (b) is a perspective view showing the upper and lower surfaces of the protector cylinder of the press to which the press roller guide according to the present invention is applied.
Figure 6 (a) and (b) is a view showing the disassembled and assembled state of the press roller guide according to the present invention.
7 is a view showing another embodiment of the eccentric shaft of the press roller guide according to the present invention.
8 is a view for explaining the adjustment (adjustment) of the guide roller of the roller guide for press according to the present invention.
9 is a view for explaining the adjustment (adjustment) sequence of the guide roller of the roller guide for press according to the present invention.

Hereinafter, with reference to the accompanying drawings of the roller guide for press according to the present invention, the features will be understood by an embodiment described in detail.

Prior to this, the terms or words used in this specification and claims should not be construed as being limited to the usual or dictionary meaning, and the inventor appropriately uses the concept of the term in order to explain his/her invention in the best way. It should be interpreted as a meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention, and do not represent all the technical ideas of the present invention, so at the time of this application, they can be replaced. It should be understood that there may be many equivalents and variations.

Referring to Figures 1 to 6 and 9, the press roller guide according to the present invention is so that the slide that is lifted to press work the workpiece at the top of the bolster can be stably and precisely moved up and down along the frame. It is a roller guide for press.

The press 1 to which the present invention is applied is provided with a drive unit 200 provided on the upper side of the frame unit 100 and a bolster provided on the lower side of the frame unit 100 and in which a workpiece to be pressed is located ( 300), and a slide 400 positioned above the bolster 300 to receive power from the drive unit 200 and move up and down along the frame unit 100 to process the workpiece.

Hereinafter, the configuration of each part of the press to which the present invention is applied will be described in detail.

The frame unit 100 includes a pair of vertical frames 110 and 120 spaced apart on both left and right sides, an upper frame 130 connecting upper portions of the vertical frames 110 and 120, and connecting lower portions of the vertical frames 110 and 120 Consists of a lower frame (140).

At this time, the tie rod 150 is vertically fastened to the upper side of the upper frame 130 and the vertical frames 110 and 120, and to the tie rod 150 to the lower side of the lower frame 140 and the vertical frames 110 and 120. As the coupled tie-rod nut 152 is fastened, processing of each frame is easy and disassembly and assembly are simple, so transportation is also easy.

In addition, it is preferable to reduce the front and rear vibration amount of the servo press 1 of the present invention by increasing the leg portion 142 in the front and rear directions at the lower end of the lower frame 140.

The drive unit 200 is supported on the upper side of the frame unit 100, and the drive unit 200 is mounted on the drive unit body 210 fixed to the frame unit 100 and the drive unit body 210 to perform the slide ( It includes first and second driving units 220 and 230 that elevate the 400 .

First, the first drive unit 220 includes a first servo motor 221 installed on the rear side of the drive unit body 210, and a first drive shaft 222 receiving rotational force of the first servo motor 221 and , the first pinion gear 223 mounted on the first drive shaft 222 and rotating, the first main gear 224 meshed with the first pinion gear 223 and rotating, and the first main gear and a first crankshaft 225 to which 224 is mounted.

At this time, the first servo motor 221 is installed on the rear side of the drive unit body 210, the first drive shaft 222, the first pinion gear 223, the first main gear 224 and the first crank The shaft 225 is installed inside the driving unit body 210 .

Here, the front end of the first crankshaft 225 is rotatably supported by the first crank supporter 240 fixed to the front surface of the driving unit body 210 .

The first crank supporter 240 has a disk shape and is evenly fixed to the front (front frame) of the driving unit body 210 to increase the load application area and to easily distribute the load, and the front side of the driving unit body 210. It has the advantage of relieving local deformation by distributing the load acting on the part.

In addition, since the first crank supporter 240 has a circular cross section as a whole, it is possible to easily perform the assembly work of the first crankshaft 225 as well as the installation on the drive unit body 210, As the bolts are fastened at regular intervals, the fastening force is improved.

In addition, the second drive unit 230 includes a second servo motor 231 installed on the rear side of the drive unit body 210 and a second drive shaft 232 receiving rotational force of the second servo motor 231. And, a second pinion gear 233 mounted on the second drive shaft 232 and rotating, a second main gear 234 meshed with and rotating with the second pinion gear 233, and the second main It includes a second crankshaft 235 on which gear 234 is mounted.

At this time, the second servo motor 231 is installed on the rear side of the drive unit body 210, the second drive shaft 232, the second pinion gear 233, the second main gear 234 and the second crank The shaft 235 is installed inside the driving unit body 210 .

Here, the front end of the second crankshaft 235 is rotatably supported by the second crank supporter 250 fixed to the front surface of the driving unit body 210 .

The second crank supporter 250 has a disk shape and is evenly fixed to the front (front frame) of the drive unit body 210 to increase the load application area and to easily distribute the load, and the front side of the drive unit body 210. It has the advantage of relieving local deformation by distributing the load acting on the part.

In addition, since the second crank supporter 250 has a circular cross section as a whole, it is possible to easily perform the assembly work of the second crankshaft 235 as well as the installation on the drive unit body 210, As the bolts are fastened at regular intervals, the fastening force is improved.

The first and second driving units 220 and 230 are configured to be arranged side by side on the lower left and right sides of the driving unit body 210, and the slide 240 is individually controlled by the first and second servomotors 221 and 231, respectively. ) is basically a structure that lifts and drives.

However, the first and second idle gears 226 and 236 may be additionally assembled to interlock the first and second main gears 224 and 234 in case the left and right points are unexpectedly imbalanced and synchronization control is impossible.

In this case, the first main gear 224 meshes with the first idle gear 226, the second main gear 234 meshes with the second idle gear 236, and the first and second idle gears 226 and 236 It is also to be combined with the liver. Of course, the first and second idle gears 226 and 236 are coupled to the first and second idle shafts 227 and 237.

In addition, the driving unit 200 preferably further includes safety brakes 228 and 238 for braking the first and second servomotors 221 and 231, a balance cylinder 229, and a balance cylinder air tank 239. .

The driving unit 200 as described above can improve torque capability by independently driving the two servomotors 221 and 231 to the respective main gears 224 and 234, as well as enabling precise control according to individual control.

In addition, when an angular velocity detection encoder of the gear unit and a position detection linear scale sensor are additionally mounted on the left/right sides of the slide in addition to the encoder, the first and second servomotors 221 and 231 provide feedback to enable high-precision press processing.

On the other hand, the bolster 300 is fixed to the upper side of the lower frame 140 constituting the frame portion 100, and the bolster 300 is equipped with a mold to position a workpiece to be press-worked.

The upper part of the bolster 300 is provided with a slide 400 that moves up and down along the frame part 100 by receiving power from the driving part 200 .

The slide 400 is vertically mounted on the first and second crankshafts 225 and 235 of the first and second driving units 220 and 230 constituting the driving unit 200 and moves up and down. The slide body 420 is coupled to the lower ends of the connecting rods 410 and 412.

At this time, first and second protector cylinders 430 and 440 are mounted on the upper side of the slide body 420, and the first and second protector cylinders 430 and 440 have lower ends and lower ends of the first and second connecting rods 410 and 412. Connected adjusting screws 411 and 413 are installed.

The first and second protector cylinders 430 and 440 have the same structure, and when the bolt is fastened, the bottom part integrally adheres to the upper side of the slide body 420 to increase the assembly surface to increase the load distribution effect. Reinforcement of the lower part of the point of the main body 420 may be reinforced.

First and second assembling protrusions 431 and 441 are further formed at the center of the bottom surface of the first and second protector cylinders 430 and 440 so as to accurately assemble the center of the point, and a fitting hole preformed in the slide body 420 shown) has the advantage of accurately assembling the center of the point.

In addition, the first and second protector cylinders 430 and 440 simplify their shapes to eliminate casting defects and reduce material and weight.

On the other hand, a roller guide 450 is provided on the side surface of the slide body 420 to guide the elevation of the slide 400 by being in close contact with the gib plate 401 provided inside the frame portion 100. .

It is preferable that a plurality of roller guides 450 are provided symmetrically on both sides of the slide body 420 . Such a roller guide 450 can improve maintainability through non-lubrication of the gib plate 401, and can reduce noise and improve precision during elevation of the slide by making the gap zero.

The roller guide 450 includes a roller housing 451 having a roller seating portion 451a formed therein and having an open front end, a guide roller 452 mounted inside the roller housing 451, and the guide roller. 452 is rotatably fitted and includes an eccentric shaft 453 supported by the roller housing 451.

At this time, a plurality of guide rollers 452 are mounted on the roller seating part 451a of the roller housing 451, and in this case, each guide roller 452 has its edge in close contact with the give plate 401. It protrudes to the front end of 451.

In this case, it is natural that a plurality of the eccentric shafts 453 are provided to correspond to the number of the guide rollers 452 .

In addition, the eccentric shaft 453 has a support hole 453a formed in the longitudinal direction through which the first fixing bolt 454 passes, and a plurality of fixings to the slide body 420 at the rear of the roller housing 451. The second fixing bolt 455 of is mounted.

At this time, an eccentric shaft support hole 451b for supporting the eccentric shaft 453 is formed in the first half of the roller housing 451, and a bolt for supporting the second fixing bolt 455 is formed in the second half of the roller housing 451. A support hole 451c is formed.

On the other hand, the eccentric shaft 453 has a head 4532 formed at one end of a cylindrical body 4531 fitted into the eccentric shaft support hole 451b of the roller housing 451 to hold the eccentric shaft 453 above. When supported in the eccentric shaft support hole 451b of the roller housing 451, the head 4532 of the eccentric shaft 453 is supported on one side of the roller housing 451 so that the roller housing 451 does not move toward the other side. prevented

The eccentric shaft 453 is rotatable while being supported by the eccentric shaft support hole 451b of the roller housing 451, and the cylindrical body 4531 of the eccentric shaft 453 has the shaft hole of the guide roller 452. When the eccentric part 4533 inserted into 453a is formed and the head part 4532 is rotated in one direction or the other direction, the guide roller 452 may protrude in the front end direction of the guide roller 452 . Accordingly, the gap between the guide roller 452 and the gib plate 401 can be adjusted to zero, and noise and precision can be improved when the slide 400 moves up and down.

In addition, a bolt support groove 4532a capable of supporting the bolt head 454a of the first fixing bolt 454 is formed in the center of the head 4532 of the eccentric shaft 453, as well as an index hole capable of confirming the location. An index hole (4532b) is formed on one side of the end surface of the head 4532 of the eccentric shaft 453, so that the rotational position and direction of the eccentric shaft 453 can be checked.

In addition, when the eccentric shaft 453 is supported by the first fixing bolt 454 on the circumferential surface of the head 4532 of the eccentric shaft 453, a wave that can be held by various tools can be prevented from spinning. It is preferable that at least two or more ground surfaces 4532c are formed.

As shown in FIG. 7, the eccentric shaft 453 forms a plurality so that the gripping surface 4532c forms a hexagon, and the bolt support groove 4532b formed in the head portion 4532 also includes a first fixing bolt ( Considering that the bolt head 454a of 454 is hexagonal, it may be formed in a hexagonal shape. Through this, it is possible to assemble the first fixing bolt 454 in a state in which the head 4532 of the eccentric shaft 453 is fixed so as not to rotate using a tool such as a spanner.

In addition, in the roller guide 450, the plurality of covers 456, 457, and 458 and the oil cutters 456b and 457b are coupled to upper and lower ends and side surfaces with bolts 456a, 457a, and 458a.

On the other hand, Figure 8 is a view for explaining the adjustment (adjustment) of the guide roller 452 of the roller guide for press according to the present invention.

According to this, when adjusting the guide roller 452, according to this, when adjusting the guide roller 452, for example, when initially adjusting the eccentric shaft 453, a torque wrench is applied so that an appropriate force is applied to each guide roller 452. The eccentric shaft 453 is rotated and adjusted using a back, and the assembly torque is the highest when the angle of rotation of the eccentric shaft 453 is 90°.

In addition, when the eccentric shaft 453 is rotated and adjusted, the distance tolerance between the roller guide 450 and the gib plate 401 on the upright side must be properly maintained.

In addition, when the upright-side gib plate 401 is manufactured separately, it is preferable to design the roller guide 450 not to touch the separated surface.

Next, Figure 9 is a view for explaining the adjustment (adjustment) sequence of the guide roller of the roller guide for press according to the present invention.

Hereinafter, the uppermost guide roller 452 provided in the upper roller guide 450a is described as an outer roller 452a, and the guide roller 452 positioned below it is an inner roller 452b, and the lower roller guide 450b ) The lowermost guide roller 452 provided in the outer roller 452c, and the guide roller 452 located thereon will be described as an inner roller 452d.

According to this, when provided symmetrically on the upper and lower sides of both ends of the slide body 420, the eccentric shaft 453 of the slide body 420 is rotated and adjusted so that the upper, lower, left, and right sides maintain balance.

In the initial stage of adjustment, the index hole 4532b of the eccentric shaft 453 is positioned toward the center of the slide body 420, and in this state, the eccentric shaft 453 is not pressed.

Thereafter, the outer roller is manually turned clockwise to match the upright gib plate 401.

Then, determine the rotation angle of the eccentric shaft 453 and document the required torque value and rotation angle.

Next, the inner rollers 452b and 452d are manually turned to align with the upright gib plate 401, and the inner rollers 452b and 452d of each roller guide 450a450b are adjusted at a defined angle of the outer rollers 452a and 452c. Tighten.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art can make various modifications and variations without departing from the essential characteristics of the present invention. The protection scope of should be interpreted by the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

1: press 100: frame part
110,120: vertical frame 130: upper frame
140: lower frame 200: driving unit
210: driving unit body 220: first driving unit
230: second drive unit 240: first crank supporter
250: second crank supporter 300: bolster
400: slide 410: first connecting rod
412: second connecting rod 420: slide body
430: first protector cylinder 440: second protector cylinder
450: roller guide 451: roller housing
452: guide roller 453: eccentric shaft
454: first fixing bolt 455: second fixing bolt

Claims (5)

A roller guide for a press, characterized in that a roller guide for guiding by being in close contact with a gib plate provided inside the frame unit is formed on the side of the slide body of the press, which includes a drive unit, a bolster, and a slide.
According to claim 1,
The roller guide includes a roller housing having a roller seating portion formed therein and having an open front end, a guide roller mounted inside the roller housing, and an eccentric shaft in which the guide roller is rotatably fitted and supported by the roller housing. Roller guide for press, characterized in that.
According to claim 3,
An eccentric shaft support hole for supporting the eccentric shaft is formed in the first half of the roller housing, and a bolt support hole for supporting a second fixing bolt is formed in the second half of the roller housing.
The eccentric shaft has a support hole formed in the longitudinal direction and a first fixing bolt is formed through it, and a head is formed at one end of a cylindrical body fitted into the eccentric shaft support hole of the roller housing, and the cylindrical body is fitted into the shaft hole of the guide roller. Roller guide for press, characterized in that the eccentric portion is formed.
According to claim 2,
A bolt support groove capable of supporting the bolt head of the first fixing bolt is formed in the center of the head of the eccentric shaft, and an index hole capable of confirming the position is formed on one side of the end surface of the head, and the wave head is formed on the circumferential surface of the head. Roller guide for press, characterized in that the ground is formed.
According to claim 4,
The gripping surface is a roller guide for press, characterized in that two or more places are formed.

Images