TW200521347A - Linear slider and method of manufacture - Google Patents

Abstract

The present invention relates to a manufacture method of the slider of linear guide. The slider of linear guide will comprise rolling races and reflowing holes for rolling element. Besides, the slider of linear guide can conclude wing-thoughs so as the retainers of rolling element can move through. Since we use the method of investment casting (lost wax process) to make the slider, the cost of reflow holes of the slider can be ignored.

Description

200521347

[Technical field to which the invention belongs] The present invention relates to a method for reducing the cost of manufacturing two types of blocks for slide rails, called linear sliders, ball slides, and linear roller slides. Guidance of the kinematics-linear of the movement direction, where the linear slide includes linear rollers. The present invention particularly refers to a linear slide. [Previous technology] has been widely used in medical equipment, aerospace engineering or rollers. ) Makes the mechanism move less, the wear on the contact surface is doubled, and the mechanism is linearly sliding. Usually the linear slide rail can be linear ball slide; the other track; however, no matter the roll needs to have rolling to provide important structural components for the linear function of the structure, the current major functions of precision machinery, automation industry, semiconductor industry, industry, etc. The reason is to use ball rolling to reduce the frictional resistance when the mechanism moves, saving labor and saving energy. At the same time, due to friction reduction and temperature reduction, the accuracy and life of the mechanism are greatly increased. One of the important mechanical transmission elements in recent years is divided into two categories. One is the use of ball transmission, which is called a type that uses roller transmission, known as a linear roller ball or roller slider. The sliders (balls or rollers) are relatively complicated to carry and recirculate, and the processing times and costs are high. 'Due to the function of the slider 8, the element must be rolled on the slider 8. The surface needs to have a high sliding height ^ linear ball slider slider (refer to Figure 10) = no rolling element (ball) bearing must be provided It is necessary to provide a rolling groove 8 1, which is used to carry the load of the mechanism, so the rolling groove 8 1

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V. Description of the invention (2) The hardness (usually above HRC 58) is required by Yuanzhao & meanwhile, the material near the rolling groove 8 1 is also required for the abrasion resistance (Yielding Strength) to avoid ^ Falling strength ^ ^ ^ -r „C: ^ ^ ^ Avoid fatigue damage of Yucai 为了. In order to #roll 70 pieces, you can move in reverse to achieve infinite circulation. Therefore, a return hole 8 2 needs to be set on block 8, back to ☆ β ^ The purpose of the movement is to slide p ^ w々 丨 L hole 8? Α — 捅:? 丨, the return hole on the above is machined (drilled) ~, =, Γ end surface penetrates to the other-end surface, so that Rolling element Ξ Therefore, the size of the return hole 82 must be larger than that of the rolling element;:, back :: 70 pieces can pass through, and it should not be too large to avoid congestion in the rolling element ^ ^ hole 8 2 resulting in unsmooth movement; Because the length of the slider 8 is long enough to provide sufficient load bearing #, the depth of the return hole 8 2 is also large. Generally, the depth of the hole will be about ten times the diameter of the hole, and it will be difficult to process, and As long as the bit of the drilled hole is slightly passivated, it will cause the deviation of the drilled hole. The position is different; recently, there is a " retainer " linear ball bearing slide rail design (example 2 US patent 6 04 2 2 6 9 or 6 0 8 5 4 2 0), because its return hole is necessary At the same time allow the rolling element and the holding chain to pass, so the return hole needs to be provided with a wing groove 8 2 1 on both sides of the circular cross section. The wing groove 8 2 1 is used to allow the holding chain (not shown) to pass; The processing of the groove 8 2 1 is very difficult (traditional drawing with a broach is required). Therefore, the current manufacturing method is to first process a large through hole 8 4 above the slider 8. After the heat treatment and hardening, it is first ground, The patented manufacturing method of precision injection molding is used to form a plastic filling block 8 5 of plastic material in the large through hole 8 4. The manufacturing method is complicated and difficult, and the slider 8

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V. Explanation of the invention (3) The larger the hole drilled in the limited space, the worse the structure of the slider. For this reason, drilling a large through hole 8 4 will definitely reduce the structural strength of the slider 8. This :) The two ends of the slider 8 also need to be machined into the screw holes 83 to fix the end caps installed on the two ends of the slider 8). Although it is not difficult to machine the screw holes, but— Each screw hole 8 can not be hole 8 2 has strict relative position requirements, so the difficulty of processing increases, and because of the accuracy of the machine or the relative position of the tool due to the wrong position ... resulting in another slider On the other hand, in the case of linear roller sliding (refer to FIG. 11 because the slider 9 needs to be provided with a rolling element (roller) bearing), yes, it is also necessary to provide a rolling groove 9 丄 on the slider 9 and a rolling groove. 9 丄 is a track that moves several pieces to carry the load of the mechanism. Therefore, the material of the surface of the rolling groove ^ 1 and the vicinity also needs to have considerable hardness and reduced yield to avoid material wear and fatigue damage. In order to make the rolling The component can be moved in the opposite direction to achieve the purpose of infinite circulation. The slider 9 also needs to be provided with a return hole 9 2. The return hole 9 2 is a through hole, but because it needs to match the side profile of the roller, the return hole 9 2 The section must be designed as a square Holes with a circular cross section are easier to machine, while holes with a square cross section are difficult and costly to process; the current practice is to drill a large through hole 9 4 on the slider 9 first, and then A plastic filling block 95 5 is inserted into it (such as USP6 1 09789), so the structural strength is reduced as in the case of linear ball sliders. In addition, when linear roller sliders are used to hold the chain, 'there is a backflow. The hole must allow both rolling elements and the chain to pass through

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200521347 V. Description of the invention (4) 'Therefore, the side of the return hole 9 2 near the rolling groove 9 1 needs to be provided with a wing groove 9 2 1. The wing groove 9 2 1 is used to allow the chain to pass through. 'An escape groove 9 1 1 needs to be set correspondingly on the rolling groove 9 1 of the slider. • A valley is used to keep the chain through; the conventional manufacturing method is to drill a large through hole 9 4 on the slider 9 first, and then Filling it with a pre-formed plastic filling block 9 5 (for example, u SP 6 3 9 0 6 7 8), not only the manufacturing process is complicated, but the strength of plastic is far lower than that of steel materials, so the structural strength of the slider is also reduced. In addition, the screw holes 9 3 also need to be processed on both end surfaces of the slider 9. The screw holes 9 3 also have relative position problems, so the processing is difficult. Therefore, the conventional linear slider and its manufacturing method still need to be improved. SUMMARY OF THE INVENTION The object of the present invention is to provide a linear slider that is easy to manufacture and reduce the manufacturing cost, and the present invention can also avoid the situation where the return hole deviates due to poor drilling; secondly, the present invention also provides a manufacturing method, In order to avoid filling a large number of plastic parts in the return hole, the structural strength of the slider is reduced. In order to reduce manufacturing costs, casting, hot forging, and hot extrusion are all considered process methods, but the traditional casting, hot forging, and hot extrusion methods have difficulties in forming the reflow hole, so that the finished product is still formed. Need to go through the processing of the evening pass', so it is difficult to reduce the manufacturing cost. ° Evening wax casting is a high-precision casting method, and its size is high, so the wax casting may be a solution to the problem of manufacturing linear sliders. $ ^

200521347

V. Description of Invention (5) Method. However, dewaxing casting has a poor manufacturing ability for holes. For through holes (holes in front and back), the hole depth (because it is a through hole, the hole depth is the total length of the hole) and the hole ratio can only be within four times, but Unfortunately, the hole-to-depth ratio of the return hole of a linear slider is usually about ten times, and at least it will not be less than five times. This process of dewaxing cannot be used as a method of making a linear sliding soil containing a return hole. After further research, we found that the main problem of through-wax casting in through-hole manufacturing is the demolding process of the wax mold. Since the wax is a relatively soft material, it is easy to hurt the surface of the wax when the wax mold is demolded. In order to manufacture the linear slider by using dewaxing casting, the present invention designs the hole diameter of the middle part of the return hole to be small, that is, as long as the rolling elements of the linear slider can be allowed to pass; Large, so as to facilitate the mold release. For the design of the reflow hole of the present invention, the main method adopted is to set a taper section or a step section in the reflow hole: when the taper section is set, the taper of the reflow hole can facilitate the demolding of the wax mold during the dewaxing casting process; and the step section is set. A reflow hole can be divided into several different hole diameters, so that the length of a single stage is not greater than four times the hole control ', so it is convenient to remove the mold. Therefore, the return hole with taper section or (and) the return hole designed in the step section, combined with the dewaxing casting method, can facilitate the manufacture of linear sliders, not only reducing the manufacturing cost, but also the stability of the product size. In addition, in conjunction with the design of the reflow hole in the present invention, the present invention also proposes a new design of the wax mold, so that the mold mold line is designed in the middle of the reflow hole of the linear slider to facilitate demolding, so as to make the linear The depth of the return hole of the slider can reach more than five times the minimum hole diameter of the return hole.

200521347 V. Description of the invention (6) In order to facilitate further reference, please refer to the following description of the present invention for reference and reference only. To understand the features and technical contents of the present invention, please specify the preferred embodiment in detail. "This embodiment and drawings" It is not intended to limit the invention in any way. [Embodiment] The figure is a schematic perspective view of an example of an f-shaped ball slider on the slider 1 in this figure. The moving element (ball) f has two rolling grooves 1 1 'the rolling groove 1 1 is a rolling groove 1 1 The surface of the surface is used to carry the load of the mechanism, so it has a high degree of hardness to achieve the abrasion resistance and drop strength of the material to avoid the material near the M groove 1 and the material fatigue. damage. In order to borrow ^: to move indefinitely to achieve the purpose of an infinite loop so that the rolling elements can be moved inward, in slippery] μ, and volume A-one rolling groove 1 1 each set a production port sk machine 孑 Li 1 2 ， Return: 1 9 糸 〆 through hole, penetrated by one end face of slider 1, machine hole 1 2 is a piece A, to accommodate _ f_: the other side, and the size is not smoother than the rolling motion ; 4 will slider! Rain 2 will not be jammed in the hole and fixed m: End caps on the end face (not shown) are fixed and set on each end of the block 1 * ^ For the convenience of the linear ball slider system i · 2 to be fixed " The method of using dewaxing casting | y 造 ， # 么 7 The linear ball slider 1 method of XYue, the present invention will reflow the holes ... Section ::; The manufacturer of two dewaxing casting should allow the rolling elements of the linear slider to pass ^ 叶 成 小 ': The hole diameter is larger only in this way, so as to facilitate the removal of the mold 1. The two outlets at the two ends are the two views of the linear ball slide 22 of the present invention, which are included in the return hole 12- Section X and 122 of the first example of miscellaneous selection & hole

200521347 V. Description of the invention (7) 123, due to the taper section 122 and the taper section 190 hours to facilitate the demolding of the wax mold in the process of dewaxing and casting · 'Fig. 3: 3: Recirculation of ball sliders with heterogeneity' A cross-sectional view of the second example of a hole. Back = Beiming's linearity section 1 2 2, a taper section 1 2 3 and a straight hole section ^ $ 1 2 consists of a cone, of which the taper section 1 2 2 and the taper section 1.2 3 have ^ Miscellaneous 2 4 combination is formed to remove the wax mold during the dewaxing casting process, and the straight hole 〇 ^ can facilitate the total length of the return hole 12 (hole depth). 'Another 1 2 4 is used to increase the wax mold of the embodiment shown in Figures 4 and 3. The molds used are from the right mold 4 丄 = the middle mold surface right mold 4 1 and the left mold 4 = f fork 4 2 combined, and in the middle position, and re-centered: Miscellaneous: Line 4 3 is set in the return hole 1 2 has a taper, the taper; section H2 and taper section 1 2 3 have a right mold 4 1 and a left mold 4 ^ into the branch with the off-off angle, so that the square can be designed at the full cone angle of 2 release. For easy demolding, the left and right taper effect is better. Above f to facilitate demolding, but the full cone angle is 2 degrees for dewaxing and casting with a taper sound. ^ For some designs that require deep reflow holes, use a block and then use a drill I force of 1 2 2 and taper sections. 1 2 3 linear ball sliding hole section ...:; force; type machining straight hole section 1 ", due to the straight-up accuracy and positioning of the precision roller and the rolling element can pass, without coordination, the straight hole section i 2 : Two requirements, so in the situation where the return hole has a tapered section, Figure 5 is easy to use in the present invention. View, section of the third example of the return hole in the figure, and the return hole of a benign ball slider 1 2 In addition to 3, the other 2 includes a taper section 1 2 2 and a taper section 1 2 2 and a taper ^, each class section 1 2 5 and 1 2 6; among which the taper X and 1 2 3 have a taper, which can facilitate dewaxing Casting

Page 12 200521347 V. Description of the invention (8) The demolding of the wax mold during the process, and the stage section; [2 5 and 1 2 6 Due to the increase of the aperture, the strength of the wax is increased, so it is not easy during the demolding process. Defects occur, and the arrangement of the segments 1 2 5 and 1 2 6 can also increase the total length of the return holes 12 (hole depth). Fig. 6 is a cross-sectional view of a fourth example of the return hole of the linear ball slider of the present invention. The arrangement of the straight hole section 1 2 4 in the figure can increase the total length (hole depth) of the return hole 12. FIG. 7 is a combination diagram near the stage segment in the embodiment of FIG. 5. In the figure, rolling element steering elements 5 1 and 5 2 are provided in the stage segment 1 2 6, and the steering elements 5 1 and 5 2 are used to provide rolling elements. The direction of movement is changed, and the design of the class section 1.2 of the present invention and the steering members 5 1 and 5 2 is different from the large through hole 8 4 in the conventional technology: the large through hole 8 4 in the conventional technology is a The through-holes have a great impact on the decrease in structural strength, and the stage segment 1 2 6 is only provided at a small part of the two ends of the return hole 12 and has little effect on the decrease in structural strength. Fig. 8 is a perspective view of the second example of the linear ball slider of the present invention. The configuration of adding a wing groove 1 2 1 is shown in the figure. Since the present invention makes the slider 1 by dewaxing casting, the wing groove 1 is added. 2 1 will not significantly increase the difficulty of production. FIG. 9 is a schematic perspective view of a linear roller slider according to the present invention, which is the same as a linear ball slider. Four slider grooves 2 1 are provided on the slider 2. The rolling groove 21 is a track on which a rolling element rolls. Load, so the material on and near the rolling groove 21 also needs to have considerable hardness and drop strength to avoid material abrasion and fatigue damage; in order to make the rolling elements can move in the opposite direction to achieve the purpose of infinite circulation rolling, the slider 2 Right

200521347 V. Description of the invention (9) Each rolling groove < 丨 ^ square-shaped through-holes should be matched with a person, 'IL 2 2, the return hole 22 is a column to pass smoothly; The profile of the side of the fork is allowed to be rolled. 'The two ends of the slider 2 are fixed on each side = the end caps (not shown) on the surface are fixed; in addition, the linear rolling is performed by: f a screw hole 2 3 to When the fixed end cover must allow rolling elements at the same time, since the return hole 2 is close to the side of the rolling groove 2 and the other, = pass, the return hole 2 of the groove 2 2 1 is set parallel to the return hole ^- Wing groove 2 2 1, but when the linear ball slides, it is used to keep the chain through the groove 2 2 1; In addition, when the flame is maintaining the chain, it is not necessary to set the wing interference in the rolling groove P of the slider The 持 ff holding chain does not run parallel to the rolling groove 2 1 to produce a moving groove 2 1, and the 需要 2 surface also needs to be provided with a roll manufacturing method and the thread holding chain of the present invention passes through. Slider 2 has several casting methods, and the same method is used for the bead slider, but also the dewaxing aperture ratio is two, I, machine hole 22 is also designed as the middle part of the middle part, and two Eli wax molds; The recirculation hole 22 is designed to have a diameter ratio of ^ = + at both ends +, which can also set the S taper section and the stage section. ^ The linear slider and its manufacturing method use the process of dewaxing and casting. It is convenient to manufacture and the cost is reduced; because the present invention designs the 1 t hole in the middle of the reflow hole to be smaller, there is no problem in dewaxing the wax in the entire dewaxing casting process, and as long as the size of the wax is correct, the dewaxing is performed after casting. The finished product has high reproducibility, which can avoid the problem of processing variation. In addition, in the present invention, it is not necessary to process a large through hole, and then fill it with a large number of plastic filling blocks. Therefore, the slider of the linear slide rail of the present invention does not have the structure of a conventional slider.

Page 14 200521347 V. Description of the Invention (ίο) The problem of reduced strength. To sum up, this case is not only innovative in terms of space type, but also can enhance the above-mentioned multiple effects over conventional technologies. It should have fully met the requirements for novel and progressive statutory invention patents, and applied in accordance with the law. Approval of this invention patent application, to encourage creativity, to the utmost.

Page 15 200521347 Brief description of the drawings [Simplified description of the drawing number] Figure 1 is an example of the linear ball slider of the present invention-three-dimensional schematic diagram Figure 2 is a sectional view of the first example of the reflow hole of the linear ball slider of the present invention Figure 3 is a cross-sectional view of a second example of the reflow hole of the linear ball slider of the present invention, and Figure 4 is a diagram. Figure 3 is a schematic diagram of the mold release of the embodiment of the third figure. Figure 5 is a first view of the reflow hole of the linear ball slider of the present invention. Cross-sectional view of three examples. FIG. 6 is a cross-sectional view of a fourth example of the recirculation hole of the linear ball slider of the present invention. FIG. 7 is a combination near the stage segment in the embodiment of FIG. Two examples of three-dimensional schematic diagrams. Nine is a three-dimensional schematic diagram of the linear roller slider of the present invention. Fig. Ten is a conventional three-dimensional schematic diagram of the linear ball slider. Explanation】 I Slider II Rolling groove 12 Return hole 1 2 1 Wing groove 1 2 2 Taper section 1 2 3 Taper section 1 2 4 Straight hole section 1 2 5 Step section 1 2 6 Step section 13 Screw hole

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Page 17 200521347 Simple illustration 9 4 Large through hole 9 5 Plastic packing block Page 18

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Claims (1)

200521347_ VI. Scope of patent application 1. A linear slider provided with a recirculation hole for circulating recirculation of rolling elements, which is characterized by:-The slider is manufactured by dewaxing and the aforementioned reflow hole is a through hole. Pores and their depth is more than five times the pore diameter. 2. The linear slider according to item 1 of the scope of patent application, wherein the cross-section of the return hole is square. 3. The linear slider according to item 1 or 2 of the scope of patent application, wherein a wing groove is provided on the return hole parallel to the return hole. 4. The linear slider according to item 2 of the scope of patent application, wherein the rolling groove is provided with an escape groove. 5. The linear slider according to item 1 of the scope of the patent application, wherein the diameter of the middle portion of the return hole is smaller than the diameter of the exit at both ends. 6. The linear slider according to item 5 of the scope of patent application, wherein the return hole includes a taper section. 7. The linear slider according to item 6 of the scope of patent application, wherein the full taper angle of the taper section is above 1 degree. 8. The linear slider according to item 5 of the scope of patent application, wherein the reflow hole Page 19, 200521347 VI. The scope of patent application includes class segments. 9. As described in the linear slider of item 8 of the patent application scope, the two ends of the reflow hole are step sections, and the middle contains a taper section. 10. The linear slider according to item 1 of the scope of patent application, in which screw holes are provided on both ends of the slider. 11. A method for manufacturing a linear slider, wherein the linear slider is provided with a recirculation hole for circulating recirculation of the rolling element, characterized in that the middle portion of the aforementioned recirculation hole has a smaller diameter than the diameter at the outlets at both ends, And it is manufactured by a dewaxing casting method, wherein the wax mold used in the dewaxing casting includes a right mold and a left mold, and a mold line of the right mold and the left mold is disposed at the middle position of the reflow hole. 12. The method for manufacturing a linear slider as described in item 11 of the scope of the patent application, wherein the middle portion of the reflow hole is subjected to drilling after dewaxing and casting. Page 20