TW201544293A - Extrusion mold, extrusion method, and manufacturing method of sliding block - Google Patents

Abstract

An extrusion mold comprises: a mold body having an inlet end surface and an outlet end surface, and including a penetrating mold cavity, the penetrating mold cavity extending from the inlet end surface to the outlet end surface; and a guiding rail with one end connected to the mold body, one surface of guiding rail flushing with an inner surface of the penetrating mold cavity along an extrusion direction, and the other end of guiding rail spaced a predetermined distance with the outlet end surface.

Description

Extrusion die, extrusion method and manufacturing method of slider

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to an extrusion die and extrusion process, and more particularly to an extrusion process using a single extrusion die for extrusion and straightening processes.

Extrusion refers to the formation of a material by extrusion. The principle is that the extruded material/extrusion is heated and pressurized moderately, and extruded into the mold at a constant speed to produce a desired shape, size and physical product. Suitable for the processing of easily shaped metal and plastic finished products. For example, aluminum extrusion is closely related to human life, from food utensils and electronic products to automobile industry and construction.

The Linear Guideway is widely used in all kinds of precision machinery. It is an important part of precision displacement and positioning, such as semiconductor equipment, machine tools, measurement and storage displacement systems. Please refer to FIG. 1 , which is a schematic cross-sectional view of a conventional linear slide. The linear slide rail is mainly composed of a rail 11, a block 12 and a rolling element 13, and a precise linear motion control with low friction is achieved by point or line contact. Therefore, the surface straightness between the guide rail 11 and the slider 12 is important.

The production process of the linear slide slider almost accounts for more than 40% of the processing cost of the entire linear slide. However, due to the limitation of the manufacturing mode of the slider, the Near Net Shape slider profile cannot be obtained, so that the material utilization rate cannot be improved and the machining time is also increased. If the slider of the linear slide is obtained by forging or machining, the material usage rate is low and the processing cost is high. Please refer to FIG. 2 , which is a schematic cross-sectional view of a conventional extrusion process. If the profile of the slider of the linear slide is extruded by the extrusion die 20 in a direction of extrusion 24, the deformation will be deformed due to different outlet stress or load after the extrusion process. The material of the extrusion is bent 26 or twisted, which will increase the subsequent secondary straightening (alignment) processing time and cost.

US Patent Publication No. US 2013/0160514 A1 discloses a method for long-term work Straightening machine, device for feeding and moving the long workpiece, and straightening method for long workpiece (BENDING-STRAIGHTENING MACHINE FOR A LONG WORKPIECE, DEVICE FOR FEEDING IN AND REMOVING SAID WORKPIECE AND METHOD FOR BEND-STRAIGHTENING LONG WORKPIECES). In the steel plant and processing plant, the type/bar steel manual control straightening machine is used for the bending and accompanying twisting of the product in the straight line direction. During the press straightening process, each pressing portion may not be the same plane or reference surface, resulting in different pressing amounts of each pressing portion and requiring more straightening, resulting in waste of pressing cost and time. Therefore, the straightening machine disclosed in the prior patent uses two or more clamping systems that can be moved axially and radially, and can be pressed and straightened according to the amount of deformation or the local part adjustment clamp length, and The twisting function is provided with different fixtures, so that the subsequent pressing parts are all the same reference surface, and the straightening precision and straightness of the product are improved. However, the pre-existing patent still focuses on improving the secondary straightening process, and cannot reduce the subsequent secondary straightening process time and cost after the extrusion process.

Therefore, there is a need to provide an extrusion die and an extrusion method that can solve the aforementioned problems.

One of the objects of the present invention is to perform an extrusion process and a straightening process using a single extrusion die.

According to the above object, the present invention provides an extrusion die comprising: a mold body having an inlet end face and an outlet end face, and including a through cavity extending from the inlet end face to the outlet end face; a guide rail, one end of which is connected to the mold body, wherein a surface of one of the guide rails is flush with an inner surface of the through hole in an extrusion direction, and between the other end of the guide rail and the outlet end surface Has a predetermined distance.

The invention further provides an extrusion method comprising the steps of: providing a blank and an extrusion die; using the extrusion die to advance the blank along an extrusion direction a row extrusion process for forming the blank into an extruded part; and after the extrusion process, the extrusion is also straightened by the extrusion die to correct the extrusion along the extrusion The straightness of the shape direction.

The extrusion method of the present invention utilizes a single extrusion die for the extrusion process and the straightening process. Since the inner surface of the extruded piece is restrained by the guiding track, and the guiding track has a predetermined length, the extruded piece is not deformed due to different outlet stress or load, and the bending and torsion of the extruded material can be improved. This can reduce the subsequent secondary straightening/aligning process.

11‧‧‧ Guide rail

12‧‧‧ Slider

13‧‧‧ rolling elements

20‧‧‧Extrusion mould

22‧‧‧Bulette

24‧‧‧Extrusion direction

26‧‧‧Bend

102‧‧‧Bullet

110‧‧‧Extrusion parts

111‧‧‧ inner surface

112‧‧‧ outer surface

113‧‧‧ channel

120‧‧‧Extrusion mould

121‧‧‧Extrusion direction

122‧‧‧Fixed parts

123‧‧‧External power source

124‧‧‧ Positioning device

124a‧‧‧ convex

124b‧‧‧ recess

130‧‧‧Mold body

131‧‧‧ entrance end face

132‧‧‧Exit end face

133‧‧‧through the cavity

134‧‧‧ inner surface

140‧‧ ‧ on the right track

140’‧‧‧ on the right track

141‧‧‧

142‧‧‧ surface

143‧‧‧

144‧‧‧ first

144a‧‧‧ first surface

145‧‧‧ second

145a‧‧‧second surface

S100~S120‧‧‧Steps

1 is a schematic cross-sectional view of a conventional linear slide.

2 is a schematic cross-sectional view showing a conventional extrusion process of a slider.

3 is a flow chart of a method of extrusion according to an embodiment of the present invention.

4 is a perspective view of a blank and an extrusion die according to an embodiment of the present invention.

5a and 5b are schematic perspective views of an extrusion die according to an embodiment of the present invention, which shows that the mold body and the guide rail are integrally designed or independently designed.

FIG. 5c is a perspective view of a squeeze die according to another embodiment of the present invention, showing that the guide rail is connected to the mold body in a locking manner.

FIG. 5d is a perspective view of a squeeze die according to another embodiment of the present invention, showing that the guide rail is connected to the mold body in a pressing manner.

Figure 6 is a perspective view of an extrusion member and an extrusion die according to an embodiment of the present invention.

Figure 7 is a cross-sectional view of the extruded member and the mold body taken along line A-A of Figure 6.

Figure 8 is a front elevational view of an extruded member in accordance with one embodiment of the present invention.

Figure 9 is a cross-sectional view of the extruded member and the guide rail along the line B-B of Figure 6.

Figure 10 is a cross-sectional view showing an extruded member and a guide rail according to another embodiment of the present invention.

In order to make the above objects, features and features of the present invention more obvious, The related embodiments of the present invention will be described in detail below with reference to the drawings.

3 is a flow chart of a method of extrusion according to an embodiment of the present invention. The The extrusion method comprises the steps of: providing a blank and an extrusion die (step S100); using the extrusion die to perform the extrusion process in the extrusion direction to form the blank into an extruded component ( Step S110); and, after the extrusion process, the extrusion is also straightened by the extrusion die to correct the straightness of the extrusion along the extrusion direction (step S120). In the present embodiment, the preliminary shape of the slider of the linear slide is described by the extrusion die, but it is not intended to limit the present invention.

In step S100, referring to FIG. 4, a billet 102 is provided. And an extrusion die 120. The billet 102 can be a metal (eg, steel, iron, aluminum, magnesium, titanium, etc.) or a non-metal. The blank 102 can be a round bar or a square bar. In the present embodiment, a short square bar steel blank is taken as an example. The extrusion die 120 includes a die body 130 and a guide rail 140. The mold body 130 has an inlet end surface 131 and an outlet end surface 132 and includes a through hole 133 extending from the inlet end surface 131 to the outlet end surface 132. One end 141 of the guide rail 140 is coupled to the mold body 130. One of the inner surfaces 134 of the through-cavity 133 is flush with the surface 142 of one of the guide rails 140 in an extrusion direction 121. The other end 143 of the guiding rail 140 has a predetermined distance from the outlet end surface 132, that is, the guiding rail 140 has a predetermined length.

Referring to FIGS. 5a and 5b, the mold body 130 and the guide rail 140 can be Designed for the overall design or independent individual, and by processing or assembly into a extrusion mold 120 with a straight guiding function. The material of the extrusion die 120 is generally a die steel comprising alloy steel (chromium molybdenum steel), carbon steel, stainless steel or other metal materials.

In this embodiment, the mold body 130 and the guide rail 140 are integral. The body guide is designed and integrally formed with the mold body 130 (shown in Figure 5a).

In another embodiment, the mold body 130 and the guide rail 140 are Independent individual design, and the guide rail 140 is welded to the mold body 130 (as shown in Figure 5a). Alternatively, the mold body 130 and the guide rail 140 are independent. The body guide 140 is connected to the mold body 130 in a locking manner. Moreover, the extrusion die 120 further includes a plurality of fixing members 122 (such as screws) for locking the guiding rail 140 to the mold body 130 (as shown in FIG. 5c).

In still another embodiment, referring to FIG. 5d, the extrusion die 120 is further An external power source 123 is included to connect the guide rail 140 to the mold body 130 in a compression manner. The external power source 123 can be hydraulic or pneumatic. Moreover, the extrusion die 120 further includes a positioning device 124 disposed between the guiding rail 140 and the die body 130 for positioning the guiding rail 140 on the die body 130. For example, the positioning device 124 is a convex portion 124a and a concave portion 124a, and is disposed on one of the guiding rail 140 and the mold body 130 and the other. When the convex portion 124a is engaged with the concave portion 124b, the guide rail 140 is positioned on the mold body 130. If the guiding rail 140 is positioned on the mold body 130, the external power source 123 can effectively connect the guiding rail 140 to the mold body 130 in a pressing manner.

In step S110, please refer to FIGS. 6 and 7 to utilize the extrusion die. The blank 102 is subjected to an extrusion process in an extrusion direction 121 to form the blank 102 into an extruded member 110. For example, the blank body 130 of the extrusion die 120 can be used to perform the extrusion process of the blank 102 along the extrusion direction 121, so that the blank 102 is shaped into the extrusion of the slider according to the shape of the through cavity 133. Profile 110. Please refer to FIG. 8 , which is a front view of an extruded part according to an embodiment of the present invention. The slider extrusion 110 has an inner surface 111 and an outer surface 112. The inner surface 111 defines a channel 113 that is located outside the channel 113. The extrusion process may be a direct extrusion type, an indirect extrusion type or a hydrostatic extrusion type, but is not limited thereto.

Preferably, the extrusion process may include: first heating the billet 102 Process and then squeeze. In detail, the heat treatment process of the billet 102 can change the material properties of the billet 102 to make it easy to process. For example, in the present embodiment, the billet 102 may be a carbon steel material (but is not limited thereto), which may be heated to about 1150 ° C after the heat treatment process to facilitate subsequent extrusion processes.

In step S120, please refer to FIGS. 6 and 9, after the extrusion process, At the same time, the extrusion die 110 is also subjected to a straightening process by the extrusion die 120 to correct the straightness of the extrusion member 110 along the extrusion direction 121. For example, after the extrusion process, the surface 142 of the guide rail 140 of the extrusion die 120 is also contacted with the inner surface 111 of the extrusion member 110, and the extrusion member 110 is formed by the extrusion force. Holding or aligning the guide rail 140 in a straight line, the surface 142 of the guide rail 140 can correct the straightness of the extruded member 110 along the extrusion direction 121, that is, straighten the inner surface of the extruded member 110. 111. Moreover, since the outer surface 112 of the extruded member 110 is not restrained by the guiding rail 140, the stress generated by the extrusion process on the extruded member 110 can be released.

The extrusion method of the present invention uses a single extrusion die for extrusion molding Process and straightening process. Since the inner surface 111 of the extruded member 110 is restrained by the guiding rail 140 and the guiding rail 140 has a predetermined length, the extruded member 110 is not deformed due to different outlet stress or load, and the extruded member 110 can be improved. Material bending and torsion, thereby reducing the subsequent secondary straightening / straightening process.

Please refer to FIG. 10 , which is an extruded part according to another embodiment of the present invention. A schematic cross-sectional view of the guide rail. The guide rail 140' can be fully covered and includes a first portion 144 and a second portion 145. The first portion 144 has a first surface 144a for contacting the inner surface 111 of the extrusion 110. The second portion 145 has a second surface 145a for contacting a portion of the outer surface 112 of the extrusion 110. In addition to straightening the inner surface 111 of the extruded member 110, a portion of the outer surface 112 of the extruded member 110 can be straightened, which increases the straightening area of the extruded member 110.

Preferably, the extrusion member 110 of the slider can be profiled Cheng, through the drawing process, to finish the extrusion 110 of the slider.

Preferably, the finishing process can be further performed after the profile drawing process Thereafter, the extrusion member 110 is subjected to a machining process to complete the slider having various detail features, that is, the method for manufacturing the slider includes the above extrusion method (including extrusion process and straightening process), and profile drawing Manufacturing process and machining process.

The invention improves the straightness and the twist of the extruded profile in the extrusion process Current situation, replacing the straightening process. The invention reduces the processing amount and processing cost derived from the deformation of the extruded profile. The present invention reduces labor costs for straightening operations. The invention is not limited by specifications and is widely used in current extrusion mass production equipment.

In summary, it is only described that the present invention is used to solve the problem. The preferred embodiments or examples of the technical means are not intended to limit the scope of the invention. That is, the equivalent changes and modifications made in accordance with the scope of the patent application of the present invention or the scope of the invention are covered by the scope of the invention.

102‧‧‧Bullet

110‧‧‧Extrusion parts

120‧‧‧Extrusion mould

121‧‧‧Extrusion direction

130‧‧‧Mold body

132‧‧‧Exit end face

133‧‧‧through the cavity

140‧‧ ‧ on the right track

142‧‧‧ surface

Claims (12)

An extrusion die comprising: a mold body having an inlet end face and an outlet end face, and comprising a through hole extending from the inlet end face to the outlet end face; and a guide track, one end of which is connected In the mold body, an inner surface of the through hole is flush with a surface of one of the guide rails in an extrusion direction, and a predetermined distance between the other end of the guide rail and the outlet end surface. The extrusion die according to claim 1, wherein the guide rail is integrally formed with the mold body. The extrusion die of claim 1, wherein the guide rail is welded to the mold body. The extrusion die according to claim 1, wherein the guide rail is connected to the mold body in a locking manner. The extrusion die of claim 4, further comprising: a plurality of screws for locking the guide rail to the mold body in a locking manner. The extrusion die of claim 1, further comprising: an external power source for pressing the guiding rail to the mold body; and a positioning device disposed on the guiding rail and the Between the mold bodies. The squeezing die of the sixth aspect of the invention, wherein the positioning device is a convex portion and a concave portion, respectively disposed on one of the guiding track and the mold body and the other one, when the convex portion card When the recess is engaged, the guide rail is positioned on the mold body. An extrusion method comprising the steps of: providing a blank and an extrusion die; Using the extrusion die, the blank is extruded in an extrusion direction to form the blank into an extruded piece; and after the extrusion process, the extrusion is also used to form the extrusion A straightening process is performed to correct the straightness of the extruded piece along the extrusion direction. The extrusion method of claim 8, wherein the extrusion die comprises: a die body having an inlet end face and an outlet end face, and comprising a through hole, the through cavity from the inlet end face Extending to the outlet end surface; and a guide rail, one end of which is connected to the mold body, wherein an inner surface of the through mold cavity is flush with a surface of the guide rail in the extrusion direction, and the guide rail is another There is a predetermined distance between one end and the end face of the outlet. The extrusion method of claim 9, wherein the extrusion has an inner surface and an outer surface, the inner surface defining a channel, the outer surface being located outside the channel, the surface of the guiding track Used to contact the inner surface of the extruded part. The extrusion method of claim 10, wherein the guide rail comprises a first portion and a second portion for contacting the inner surface and a portion of the outer surface of the extrusion. A method for manufacturing a slider, comprising the steps of: providing a blank and an extrusion die; using the extrusion die to perform an extrusion process on the blank in an extrusion direction to form the blank into an extruded component; After the extrusion process, the extrusion is also straightened by the extrusion die to correct the straightness of the extrusion along the extrusion direction; the extrusion of the slider is profiled. a manufacturing process for finishing the extruded part; and subjecting the finished extruded part to a machining process.