Fixing fixtures and fixing devices

Abstract

To provide a fixing jig and fixing device more suitable for securing workpieces. [Solution] A fixing jig according to one aspect of the present disclosure comprises a base made of magnetic metal, a support made of resin held by the base, and a contact member made of an elastic material that covers at least a part of the support and is fixed directly or indirectly to the support. The Young's modulus of the support is smaller than that of the base. The Young's modulus of the contact member is smaller than that of the support. The contact member is in contact with the workpiece.

Description

Technical Field

[0001] The present disclosure relates to a fixing jig and a fixing device.

Background Art

[0002] As a method for fixing a workpiece during processing such as grinding and polishing, after placing the workpiece on a magnetic table, a plurality of iron blocks that are magnetically adsorbed to the magnetic table are arranged so as to sandwich the workpiece, thereby fixing the workpiece. This method is known (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the above-described conventional technology has room for further improvement in terms of providing a fixing jig more suitable for fixing a workpiece.

[0005] For example, in the above-described conventional technology, stress is generated at the contact portion between the workpiece and the iron block due to the machining resistance when machining the workpiece, and as a result, chipping or cracking may occur at the contact portion of the workpiece with the iron block. In addition, the iron block is likely to be displaced by the impact transmitted from the workpiece during machining, and it has been difficult to stably fix the workpiece for a long time.

[0006] The present disclosure provides a fixing jig and a fixing device more suitable for fixing a workpiece.

Means for Solving the Problems

[0007] A fixing jig according to one aspect of the present disclosure comprises a base made of a magnetic metal, a support made of resin held by the base, and a contact member made of an elastic material that covers at least a portion of the support and is fixed directly or indirectly to the support. The Young's modulus of the support is smaller than that of the base. The Young's modulus of the contact member is smaller than that of the support. The contact member is in contact with the workpiece. [Effects of the Invention]

[0008] According to this disclosure, it is possible to provide fixing jigs and fixing devices that are more suitable for fixing workpieces. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is a plan view showing an example of the configuration of a fixing device according to the first embodiment. [Figure 2] Figure 2 is a perspective view showing an example of the configuration of a fixing jig according to the first embodiment. [Figure 3] Figure 3 is a cross-sectional view taken along the line III-III shown in Figure 1. [Figure 4] Figure 4 is a side view showing an example of the configuration of a fixing device according to the second embodiment. [Figure 5] Figure 5 is a perspective view showing an example of the configuration of a fixing jig according to the third embodiment. [Figure 6] Figure 6 is a perspective view showing an example of the configuration of a fixing jig according to the fourth embodiment. [Modes for carrying out the invention]

[0010] The following describes in detail, with reference to the drawings, embodiments for implementing the fixing jig and fixing device according to this disclosure (hereinafter referred to as "Embodiments"). However, this disclosure is not limited by these embodiments. Furthermore, each embodiment can be combined as appropriate, provided that the processing content is not inconsistent. Also, the same parts are denoted by the same reference numerals in each of the following embodiments, and redundant descriptions are omitted.

[0011] Furthermore, in the embodiments described below, expressions such as "constant," "orthogonal," "perpendicular," or "parallel" may be used, but these expressions do not require strict adherence to "constant," "orthogonal," "perpendicular," or "parallel" conditions. In other words, each of the above expressions allows for deviations, for example, in manufacturing accuracy or installation accuracy.

[0012] <First Embodiment> First, the configuration of the fixing jig 10 and fixing device 100 according to the first embodiment will be described with reference to Figures 1 to 3. Figure 1 is a plan view showing an example of the configuration of the fixing device 100 according to the first embodiment.

[0013] As shown in Figure 1, the fixing device 100 may have a plurality of fixing jigs 10, a holding member 60, and a magnetic table 70. The fixing jig 10 may have a base portion 1, a support portion 2, and a contact member 3. In Figure 1, the fixing device 100 has, for example, three fixing jigs 10. However, the fixing device 100 only needs to have at least two fixing jigs 10.

[0014] The fixing device 100 can be used, for example, as a fixing device for fixing a workpiece 50 in a processing apparatus for grinding, polishing, cutting, blasting, and painting. As shown in Figure 1, the workpiece 50 may be, for example, a disc-shaped member. However, the workpiece 50 is not limited to a disc-shaped member, but may also be a rectangular plate-shaped member, a cylindrical member, a rectangular prismatic member, etc.

[0015] The fixing device 100 fixes the workpiece 50, which is located on the magnetic table 70, by gripping it with three fixing jigs 10 arranged around the workpiece 50. Specifically, as will be described later, the fixing jigs 10 are fixed to the magnetic table 70 by magnetic attraction using a base portion 1 made of magnetic metal. Also, as shown in Figure 1, a holding member 60 for adjusting the height of the workpiece 50 relative to the magnetic table 70 may be located between the workpiece 50 and the magnetic table 70.

[0016] The magnet table 70 may be, for example, an electromagnet. According to such a configuration, by flowing an electric current through the magnet table 70, the fixing jig 10 can be easily fixed to the magnet table 70. Not limited to this, the magnet table 70 may be a permanent magnet.

[0017] FIG. 2 is a perspective view showing an example of the configuration of the fixing jig 10 according to the first embodiment. As shown in FIG. 2, the base portion 1 may be, for example, an angle member having a quadrangular shape in plan view and an L-shaped in side view. The base portion 1 may have a first surface 11 and a second surface 12 located opposite to the first surface 11. The first surface 11 and the second surface 12 are surfaces parallel to the surface of the magnet table 70.

[0018] The base portion 1 holds the support portion 2. For example, the base portion 1 may hold the support portion 2 on the first surface 11. Also, the base portion 1 may be fixed to the magnet table 70 by magnetic adsorption on the second surface 12. That is, the first surface 11 of the base portion 1 may be the surface on which the support portion 2 is placed, and the second surface 12 of the base portion 1 may be the surface that contacts the magnet table 70.

[0019] The base portion 1 may have a plurality of screw holes 13 (see FIG. 3). The plurality of screw holes 13 may be located on the first surface 11. Only one screw hole 13 is shown in FIG. 3, but the base portion 1 may have, for example, five screw holes 13 corresponding to the five screws 4 shown in FIG. 2. Note that the number of the screws 4 and the screw holes 13 is not limited to five. According to such a configuration, the support portion 2 can be fixed to the base portion 1 by screwing. This point will be described later with reference to FIG. 3.

[0020] The base portion 1 may be a member made of a magnetic metal. Thereby, the second surface 12 of the base portion 1 can be fixed to the magnet table 70 by magnetic adsorption. Thus, by positioning the base portion 1 made of a magnetic metal on the side contacting the magnet table 70, the fixing jig 10 can be easily fixed to the magnet table 70.

[0021] The magnetic metal constituting the base portion 1 may be, for example, SUS (Stein Useless Steel). Specifically, the magnetic metal constituting the base portion 1 may be, for example, SUS430, SUS410, or SUS440C. These SUS are difficult to rust and thus have excellent durability. Note that the Young's modulus of the base portion 1 made of SUS may be, for example, about 190 to 210 GPa. The Young's modulus of the metal material may be measured in accordance with JIS Z 2280.

[0022] The support portion 2 may be, for example, a thin plate-like member. Specifically, the support portion 2 may have a third surface 21, a fourth surface 22 located opposite to the third surface 21, and a fifth surface 23 located on the workpiece 50 side among the side surfaces connecting the third surface 21 and the fourth surface 22.

[0023] The support portion 2 may be held by the base portion 1 on the third surface 21. In other words, the third surface 21 may be a surface facing the first surface 11 of the base portion 1.

[0024] The fifth surface 23 may be an end surface of the support portion 2 facing the workpiece 50 side. The contact member 3 described later may be located on the fifth surface 23.

[0025] The fifth surface 23 of the support portion 2 may have a V-shaped in a plan view of the support portion 2. Specifically, in a plan view of the support portion 2, the fifth surface 23 may have a V-shaped with both ends protruding toward the workpiece 50 side more than the center. According to such a configuration, the fixing jig 10 contacts the workpiece 50 at at least two points. Thereby, the workpiece �0 can be stably fixed.

[0026] Furthermore, if the fifth surface 23 of the support portion 2 has a V-shape in plan view, even if, for example, the contact portion of the workpiece 50 with the fixing jig 10 is curved, the fixing jig 10 and the workpiece 50 will contact at least two points. For this reason, even if the workpiece 50 is a disc-shaped member or a cylindrical member, such a workpiece 50 can be stably fixed.

[0027] The support portion 2 may have a plurality of through holes 24 extending from the third surface 21 to the fourth surface 22 (see Figure 3). The plurality of through holes 24 may each be provided at a position opposite to the screw holes 13 of the base portion 1. With this configuration, the support portion 2 can be screwed to the base portion 1 with screws 4. Specifically, the support portion 2 can be fixed to the base portion 1 by screwing the screws 4 inserted through the through holes 24 into the screw holes 13. In the first embodiment, the support portion 2 has five through holes 24 corresponding to five screw holes 13.

[0028] The support portion 2 may be a resin component. The resin constituting the support portion 2 may be, for example, polyvinyl chloride, polyphenylene sulfide, or polyimide resin. As the polyimide resin, for example, Vespel® can be used.

[0029] These resins have a relatively small coefficient of thermal expansion. Specifically, these resins have a coefficient of thermal expansion of approximately 7 × 10⁻⁶. -5 The temperature may be around / °C. With this configuration, even if the temperature of the fixing jig 10 rises when processing the workpiece 50, the support part 2 is less likely to deform due to heat. Therefore, with a fixing jig 10 having this configuration, the workpiece 50 can be fixed stably.

[0030] Furthermore, these resins have a moderate Young's modulus. Specifically, the Young's modulus of such resins may be around 2 to 3 GPa. A support part 2 made of a resin with such a Young's modulus can suitably absorb and disperse the impact received by the workpiece 50 during processing. Therefore, a fixing jig 10 having such a configuration can stably fix the workpiece 50. The Young's modulus of the resin may be measured in accordance with, for example, JIS Kb7161-2, JIS K 7127, etc.

[0031] The contact member 3 may be located on the fifth surface 23 of the support portion 2. Specifically, the contact member 3 may be fixed directly or indirectly to the fifth surface 23. For example, the contact member 3 may be indirectly joined to the fifth surface 23 by a bonding material (not shown). Also, if the contact member 3 is made of rubber, it may be directly heat-bonded to the fifth surface 23 by bringing the contact member 3 into contact with the fifth surface 23 while it is heated.

[0032] The contact member 3 is a member that comes into contact with the workpiece 50. The contact member 3 may be a sheet-like member made of an elastic material. The elastic material constituting the contact member 3 may have a Young's modulus of, for example, 0.01 to 0.2 GPa. Such an elastic material may be, for example, rubber. Specifically, it may be a relatively inexpensive rubber such as urethane rubber or natural rubber. Alternatively, it may be a fluororubber with high chemical resistance. Alternatively, the contact member 3 may be an elastic material other than rubber, such as a metal spring, silicone seal, polyurethane foam, elastomer, porous resin, etc. The Young's modulus of the contact member such as rubber may be measured in the same way as the Young's modulus of resin.

[0033] When the contact member 3 is an elastic material, the impact force transmitted from the workpiece 50 can be suitably absorbed and dispersed by the contact member 3. For this reason, compared to, for example, when the fixing jig 10 is made of metal only, chipping or cracking is less likely to occur at the contact point between the workpiece 50 and the fixing jig 10.

[0034] When the elastic material constituting the contact member 3 is rubber, the workpiece 50 is relatively less likely to slip against the contact member 3. Therefore, even if the workpiece 50 vibrates, for example, the workpiece 50 is less likely to shift position relative to the fixing jig 10. Consequently, the workpiece 50 can be stably fixed for a long period of time.

[0035] The contact member 3 may be located on the workpiece 50 side of the base portion 1. In this case, the contact portion between the contact member 3 and the workpiece 50 is located on the workpiece 50 side of the base portion 1. Therefore, the base portion 1, which has a relatively high Young's modulus, is less likely to come into contact with the workpiece 50. Consequently, chipping or cracking is less likely to occur at the contact point between the workpiece 50 and the fixing jig 10.

[0036] The fifth surface 23 of the support portion 2 to which the contact member 3 is fixed may be located on the workpiece 50 side of the base portion 1. In other words, the support portion 2 may be fixed to the base portion 1 with the fifth surface 23 protruding further toward the workpiece 50 than the base portion 1. With this configuration, the base portion 1, which has a relatively high Young's modulus, and the workpiece 50 are less likely to come into contact. Therefore, chipping or cracking of the workpiece 50 is less likely to occur at the contact point with the fixing jig 10.

[0037] Furthermore, with this configuration, the portion of the support 2 located closer to the workpiece 50 than the base 1 is more easily deformed in accordance with the movement of the workpiece 50. Therefore, the impact force transmitted to the fixing jig 10 can be suitably absorbed or dispersed by the support 2. Consequently, the workpiece 50 can be stably fixed.

[0038] A grid-like groove may be located on the fifth surface 23 of the support portion 2 to which the contact member 3 is fixed. With this configuration, for example, when the contact member 3 is joined to the fifth surface 23 with a bonding material, the bonding material can fit into the groove. As a result, the contact member 3 can be joined more firmly to the fifth surface 23 by the anchoring effect.

[0039] Figure 3 is a cross-sectional view taken along the line III-III shown in Figure 1. As shown in Figure 3, a holding member 60 may be positioned between the workpiece 50 and the magnetic table 70. The holding member 60 holds the workpiece 50 from below. The height of the workpiece 50 relative to the magnetic table 70 may be adjusted using the holding member 60.

[0040] The holding member 60 may be, for example, a disc-shaped member having a smaller diameter than the workpiece 50. The holding member 60 may also be made of, for example, ceramics. The shape of the holding member 60 can be appropriately changed to match the shape of the workpiece 50.

[0041] As shown in Figure 3, a space may be formed between the portion of the support 2 located closer to the workpiece 50 than the base 1 and the magnetic table 70. In this case, the fixing jig 10 grips the workpiece 50 above the magnetic table 70. With this configuration, for example, even if the height dimension of the workpiece 50 is large, the workpiece 50 can be stably fixed. Specifically, with this configuration, the workpiece 50 is less likely to tip over on the magnetic table 70.

[0042] As described above, the fixing jig 10 of this disclosure has a Young's modulus of the support portion 2 that is smaller than that of the base portion 1. Also, the Young's modulus of the contact member 3 is smaller than that of the support portion 2. With this configuration, the fixing jig 10 has higher flexibility compared to, for example, a case where the fixing jig 10 is made only of metal. Therefore, the impact force transmitted from the workpiece 50 to the fixing jig 10 can be suitably absorbed and dispersed by the fixing jig 10. Accordingly, the fixing jig 10 of this disclosure can stably fix the workpiece 50 for a long period of time. Furthermore, by stably fixing the workpiece 50, the processing accuracy of the workpiece 50 by, for example, a processing device can be improved.

[0043] Furthermore, the fixing jig 10 of this disclosure has a segmented structure. Specifically, the base portion 1, the support portion 2, and the contact member 3 can be separated from each other. With this configuration, if the components constituting the fixing jig 10 deteriorate, the deteriorated component can be easily replaced. For this reason, the fixing jig 10 of this disclosure has high maintainability and significant cost advantages.

[0044] <Second Embodiment> Next, the configuration of the fixing jig 10 according to the second embodiment will be described with reference to Figure 4. Figure 4 is a side view showing an example of the configuration of the fixing device 100 according to the second embodiment. In the first embodiment, an example was described in which the support portion 2 of the fixing jig 10 is screwed to the base portion 1. On the other hand, the fixing jig 10 according to the second embodiment may have a pressing clamp 80 for fixing the support portion 2 to the base portion 1.

[0045] The pressing clamp 80 may be attached, for example, to the base portion 1 of the fixing jig 10. Specifically, the pressing clamp 80 may be located, for example, one on each of the two sides of the base portion 1. The pressing clamp 80 may be, for example, a toggle clamp. The pressing clamp 80 can press and fix the support portion 2 to the base portion 1 by pressing the fourth surface 22 of the support portion 2.

[0046] With this configuration, the fixing position of the support part 2 relative to the base part 1 can be easily adjusted. Furthermore, with this configuration, the support part 2 can be easily attached to and detached from the base part 1 compared to when screws are used.

[0047] In the second embodiment, the base portion 1 does not necessarily need to have a plurality of screw holes 13. Also, in the second embodiment, the support portion 2 does not need to have a plurality of through holes 24.

[0048] <Third Embodiment> Next, the configuration of the fixing jig 10 according to the third embodiment will be described with reference to Figure 5. Figure 5 is a perspective view showing an example of the configuration of the fixing jig 10 according to the third embodiment. The fixing jig 10 according to the third embodiment may have a plurality of support parts 2.

[0049] As shown in Figure 5, the fixing jig 10 according to the third embodiment may have a configuration in which multiple support parts 2 are stacked. In this case, the multiple support parts 2 can be fixed to the base part 1 by inserting screws 4 through through holes formed by connecting the through holes 24 of each support part 2 and fastening them with screws.

[0050] With this configuration, the height of the fixing jig 10 can be easily adjusted to match the height dimension of the workpiece 50. In this configuration, the contact member 3 may be provided on the fifth surface 23 of each support part 2, or it may be provided only on the fifth surface 23 of some of the support parts 2, for example, on the fifth surface 23 of the uppermost support part 2. Also, the thickness of each support part 2 may differ from one another.

[0051] <Fourth Embodiment> Next, the configuration of the fixing jig 10 according to the fourth embodiment will be described with reference to Figure 6. Figure 6 is a perspective view showing an example of the configuration of the fixing jig 10 according to the fourth embodiment. As shown in Figure 6, the fifth surface 23 of the support portion 2 may extend from the fourth surface 22 of the support portion 2 to the magnet table 70.

[0052] Specifically, the support portion 2 according to the fourth embodiment may have an L-shape in a side view, as shown in Figure 6. That is, the third surface 21 of the support portion 2 may be stepped, with a part on the fifth surface 23 side in contact with the magnet table 70, and a part on the opposite side of the fifth surface 23 held by the base portion 1.

[0053] This configuration allows for a larger contact area between the contact member 3 and the workpiece 50. This increases the fixing force of the workpiece 50 by the fixing jig 10. Therefore, the workpiece 50 can be stably fixed.

[0054] Although the present disclosure has been described in detail above, this disclosure is not limited to the embodiments described above, and various modifications and improvements are possible without departing from the gist of this disclosure.

[0055] The embodiments disclosed herein should be considered in all respects as illustrative and not restrictive. Indeed, the embodiments described above can be embodied in a variety of forms. Furthermore, the embodiments described above may be omitted, replaced, or modified in various ways without departing from the scope and spirit of the appended claims.

[0056] Furthermore, this technology can also be configured as follows. (1) A fixing jig for securing a workpiece, A base made of magnetic metal, A support part made of resin is held in the base part, A contact member made of an elastic material covers at least a portion of the support portion and is fixed directly or indirectly to the support portion, It has, The Young's modulus of the support portion is smaller than that of the base portion. The Young's modulus of the contact member is smaller than that of the support portion. The contact member contacts the workpiece, Fixing jig. (2) The contact member is the fixing jig described in (1) above, located on the workpiece side of the base portion. (3) The fixing jig according to (2), wherein the end face of the support portion on which the contact member is located is located on the workpiece side than the base portion. (4) The fixing jig according to any one of (1) to (3), wherein the end face of the support portion on which the contact member is located has a V-shape in plan view. (5) The fixing jig according to any one of (1) to (4) above, wherein the base portion, the support portion, and the contact member are separable from each other. (6) The base portion has a first surface and a second surface located opposite the first surface. The first surface is the surface on which the support portion is placed, The second surface is the contact surface with the magnetic table. A fixing jig as described in any one of (1) to (5) above. (7) The support portion has a third surface facing the first surface of the base portion, a fourth surface located opposite the third surface, and a fifth surface connecting the third surface and the fourth surface, which is located on the workpiece side. The third surface is a surface that is placed on the first surface of the base portion, The fifth surface is the surface to which the contact member is directly or indirectly fixed. The fixing jig described in (6) above. (8) The fixing jig according to any one of (1) to (7) above, wherein the elastic body is urethane rubber, natural rubber, or fluororubber. (9) The fixing jig according to any one of (1) to (8) above, wherein the resin is polyvinyl chloride, polyphenylene sulfide, or polyimide resin. (10) A fixing device comprising a fixing jig described in any one of (1) to (9) above, and a magnetic table for fixing the fixing jig. [Explanation of Symbols]

[0057] 1. Base section 2 Support part 3 Contact Member 4 screws 10 Fixing fixtures 11 Page 1 12 Side 2 13 screw holes 21 Page 3 22 Page 4 23 Page 5 24 Through holes 50 Workpiece 60 Retaining member 70 Magnetic Table 80 Pressure clamp 100 Fixation device

Claims

1. A fixing jig for securing a workpiece, A base made of magnetic metal, A support part made of resin is held in the base part, A contact member made of an elastic material covers at least a portion of the support portion and is fixed directly or indirectly to the support portion, It has, The Young's modulus of the support portion is smaller than that of the base portion. The Young's modulus of the contact member is smaller than that of the support portion. The contact member contacts the workpiece, Fixing jig.

2. The fixing jig according to claim 1, wherein the contact member is located on the workpiece side of the base portion.

3. The fixing jig according to claim 2, wherein the end face of the support portion on which the contact member is located is located on the workpiece side than the base portion.

4. The fixing jig according to claim 1, wherein the end face of the support portion on which the contact member is located has a V-shape in plan view.

5. The fixing jig according to claim 1, wherein the base portion, the support portion, and the contact member are separable from each other.

6. The base portion has a first surface and a second surface located opposite the first surface. The first surface is the surface on which the support portion is placed, The second surface is the contact surface with the magnetic table. The fixing jig according to claim 1.

7. The support portion has a third surface facing the first surface of the base portion, a fourth surface located opposite the third surface, and a fifth surface connecting the third surface and the fourth surface, which is located on the workpiece side. The third surface is a surface that is placed on the first surface of the base portion, The fifth surface is the surface to which the contact member is directly or indirectly fixed. The fixing jig according to claim 6.

8. The fixing jig according to claim 1, wherein the elastic body is urethane rubber, natural rubber, or fluororubber.

9. The fixing jig according to claim 1, wherein the resin is polyvinyl chloride, polyphenylene sulfide, or polyimide resin.

10. A fixing device comprising a fixing jig according to any one of claims 1 to 9, and a magnetic table for fixing the fixing jig.

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