Jig for beveling difficult-to-hold workpieces and beveling machine equipped therewith

Abstract

The technical challenge was to develop a jig and beveling machine for difficult-to-hold workpieces, enabling accurate beveling by securely clamping and holding these workpieces, which are difficult to hold using existing vise devices on beveling machines. [Solution] The beveling jig 1 of the present invention is a jig for beveling the end face of a workpiece by cutting with a milling cutter 81, wherein a base plate 2 and a pressing plate 3 are stacked at an appropriate interval, a guide plate 4 thinner than the workpiece W is placed between them, a workpiece clamping portion 11 is formed at the front end of the jig body 10, and relief inclines are formed on the base plate 2 and the pressing plate 3 to avoid interference with the milling cutter 81, and an adjustment piece 36 is provided on the opposite rear side for setting the distance between the base plate 2 and the pressing plate 3, and the pressing plate 3 receives pressure from the vise device 7 and clamps and holds the workpiece W in the workpiece clamping portion 11.

Description

Technical Field

[0001] The present invention relates to a device for beveling a metal structural member prior to welding work, and particularly to a jig for beveling a workpiece (difficult-to-hold workpiece) such as a small piece plate that is difficult to clamp, which can securely hold the workpiece and perform accurate beveling, and a beveling machine equipped with this jig.

Background Art

[0002] When welding a steel structural member or the like, in order to promote the penetration of the welding material at the welding location, beveling of the welding part of the workpiece is performed. This beveling is performed by melting or cutting, but mechanical cutting with a milling cutter has received favorable evaluations from processing contractors because the finish of the bevel is good and no further finishing is required due to this. However, in the case of mechanical cutting, the cutting resistance of the milling cutter during cutting of the workpiece is large, and for this reason, stable holding of the workpiece is an essential condition. Naturally, if the workpiece has a shape that can be sufficiently fixed by a vise device (clamping device), or if the weight of the workpiece itself is sufficiently heavy, etc., reliable holding is achieved by the vise device of the existing beveling machine, and as a result, the finish of the beveling is also good.

[0003] On the other hand, for workpieces with a shape in which the vise device in the existing beveling machine cannot function sufficiently, for example, so-called small parts types such as small piece plates, or difficult-to-hold workpieces of a short width (narrow width) type where the action of the vise device is difficult to receive, separately, a holding jig for fixing or the like is prepared, and the workpiece is firmly held through this jig, or various disposable plates are arranged around the difficult-to-hold workpiece, etc. Furthermore, the jig must meet several requirements, including on-site handling of these difficult-to-hold workpieces, being within the jig's weight capacity, being easy to set up, being easy to set up the workpiece, and, of course, ensuring reliable vise (clamping) of the workpiece. However, currently, no jigs or beveling machines with specifications that satisfy these conditions are available on the market. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 5-212612 [Patent Document 2] Japanese Patent Application Publication No. 11-48019 [Overview of the project] [Problems that the invention aims to solve]

[0005] This invention was made in consideration of the above background, and the technical objective was to develop a jig for beveling difficult-to-hold workpieces that fully takes on-site work into consideration, as well as a beveling machine equipped with this jig. [Means for solving the problem]

[0006] In other words, the jig for beveling a difficult-to-hold workpiece according to claim 1 is, A beveling jig for applying a milling cutter to a difficult-to-hold workpiece fixed on a work table to perform beveling on the end face of the workpiece, The jig body that makes up this is circuit board and A retaining plate is configured separately from this substrate and is assembled on top of the substrate in an overlapping manner with a gap between them, These include a guide plate that is thinner than the minimum thickness dimension of the workpiece and is placed between the substrate and the pressing plate. The front end of the jig body is used as the workpiece clamping section, and the base plate and the pressing plate in this workpiece clamping section have relief inclines to avoid interference with the milling cutter during beveling. On the other hand, the jig body is provided with an adjustment piece towards the rear for setting the distance between the substrate and the clamping plate, and the clamping plate is characterized in that it receives pressure from the vise device already installed in the beveling machine and holds the workpiece in the workpiece clamping section.

[0007] Furthermore, the beveling jig for difficult-to-hold workpieces described in claim 2, in addition to the requirements described in claim 1, The aforementioned substrate is characterized in that a support piece for preventing the difficult-to-hold workpiece from shifting is provided at its front end, with a selectable installation position.

[0008] Furthermore, the beveling jig for difficult-to-hold workpieces described in claim 3 is, in addition to the requirements of claim 1 or 2, The jig body is composed of a single base plate and a single clamping plate, and is characterized by the fact that these are configured to have equal width reference dimensions.

[0009] Furthermore, the beveling jig for difficult-to-hold workpieces described in claim 4 is, in addition to the requirements described in claim 1 or 2, The jig body is characterized in that multiple divided retaining plates, each divided in the width direction, are assembled on a single substrate at a standard width.

[0010] Furthermore, the beveling jig for difficult-to-hold workpieces described in claim 5 is, in addition to the requirements of claim 1 or 2, The aforementioned retaining plate is characterized by having partition slits that divide it in the width direction, and each of the partitioned retaining plates separated by these partition slits is equipped with an adjustment piece towards the rear.

[0011] Furthermore, the beveling jig for difficult-to-hold workpieces described in claim 6, in addition to the requirements described in claim 3, In the jig body in which the aforementioned single substrate and single pressing plate are of equal width standard dimensions, the substrate and pressing plate are provided with an operating through hole behind the adjustment piece, and the width of the operating through hole is set to a width dimension that allows the operator's hand to grip and operate it.

[0012] Furthermore, the beveling jig for difficult-to-hold workpieces described in claim 7 is, in addition to the requirements of claim 1 or 2, The ruler plate is fixed to the substrate so as to be able to be positioned in the front-to-back direction, and setting guidelines are provided on the top surface and side surface of the ruler plate, while the substrate is provided with an indicator for the top surface and an indicator for the side surface at a position close to the setting guidelines.

[0013] Furthermore, the beveling jig for difficult-to-hold workpieces described in claim 8 is, in addition to the requirements of claim 1 or 2, The jig body is characterized in that its weight is within the range of a worker's carrying capacity.

[0014] Furthermore, the beveling machine described in claim 9 is A work table for supporting difficult-to-hold workpieces, A machining unit that moves along a difficult-to-hold workpiece fixed on this worktable, The system includes a vise device provided opposite to the work table above the work table for fixing difficult-to-hold workpieces, A beveling machine that performs beveling on the end face of a difficult-to-hold workpiece fixed on a work table using a milling cutter provided in the processing unit, This beveling machine can be placed on a work table and holds difficult-to-hold workpieces by pressing the vise device. The present invention is characterized by comprising a jig for beveling a difficult-to-hold workpiece as described in claim 1 or 2. The aforementioned problems are then solved by the means described in each of these claims. [Effects of the Invention]

[0015] First, according to the invention described in claim 1 or 9, it is possible to reliably hold a workpiece such as a small piece plate (difficult-to-hold workpiece) that is particularly difficult to clamp, and to perform accurate chamfering.

[0016] Further, according to the invention described in claim 2, it is possible to substantially prevent misalignment that may occur during chamfering by the receiving block. In addition, since the receiving block can freely change its installation position, when there are a plurality of workpieces to be chamfered, by arranging a plurality of receiving blocks at appropriate intervals, it is possible to perform chamfering on a plurality of workpieces at once by simply reciprocating the milling cutter once.

[0017] Further, according to the invention described in claim 3, since the substrate and the pressing plate are each constituted by a single plate member, the jig body (chamfering jig) can be configured extremely simply. Such a jig body can not only firmly hold (clamp and hold) a difficult-to-hold workpiece (a small workpiece with short longitudinal and width dimensions), but also, for example, when used side by side with a wide-width type chamfering jig, a long workpiece that protrudes can be held more stably by a single wide-width type chamfering jig.

[0018] Further, according to the invention described in claim 4, since the pressing plate is divided into a plurality in the width direction with respect to a single substrate (divided pressing plate), the weight of each divided pressing plate becomes lighter, making it easier to carry and move during setting. Also, since the weight per sheet becomes lighter, the burden on the operator who moves it is also reduced.

[0019] Further, according to the invention described in claim 5, since the pressing plate is provided with partition slits, and an adjusting piece is provided on the partitioned pressing plate partitioned by these partition slits, when holding a plurality of difficult-to-hold workpieces by each partitioned pressing plate and the substrate, each difficult-to-hold workpiece can be held substantially uniformly and reliably.

[0020] Furthermore, according to the invention described in claim 6, since operating holes are provided in the substrate and the pressing plate, the weight per sheet is reduced, and the weight burden during work can be reduced. Furthermore, when setting a workpiece in a beveling jig, the operator grips each operating hole, causing the clamping plate to rise upwards with the adjustment piece as a pivot point, expanding the workpiece clamping area and making it easier to insert the workpiece into the clamping area.

[0021] Furthermore, according to the invention described in claim 7, the ruler plate can be set to an accurate position, and consequently, the protruding dimension of the workpiece's edge on the workpiece side can be accurately set.

[0022] Furthermore, according to the invention described in claim 8, the jig body 10 can be easily carried and set up, and the weight burden during work can also be reduced. [Brief explanation of the drawing]

[0023] [Figure 1] (a) is a perspective view showing a beveling machine according to the present invention, and (b) is a perspective view showing an example of a beveling jig for difficult-to-hold workpieces according to the present invention. [Figure 2] These are a plan view (a) and a front view (b) of a beveling machine. [Figure 3] This is a longitudinal cross-sectional side view of a beveling machine. [Figure 4] This is a perspective view (a) and an exploded perspective view (b) showing an example of a jig for beveling difficult-to-hold workpieces. [Figure 5] This is a perspective view (a) showing the front end (rear end) of a jig for beveling difficult-to-hold workpieces, and a perspective view (b) showing the area around the receiving piece. [Figure 6] This is a perspective view (a) and an exploded perspective view (b) showing a narrow-width type beveling jig. [Figure 7] This perspective view shows how, when a workpiece protrudes even when held with a wide-type beveling jig, a short-type beveling jig can be placed on the protruding portion (for example, the side on which the beveling is progressing). [Modes for carrying out the invention]

[0024] The present invention is as shown in the following embodiments, but it is possible to make appropriate modifications to these embodiments within the scope of the technical idea of ​​the present invention. [Examples]

[0025] The following describes in detail the beveling jig 1 for difficult-to-hold workpieces (hereinafter sometimes simply referred to as "beveling jig 1") and the beveling machine 5 equipped therewith according to the present invention. Before describing the beveling jig 1, the overview of the beveling machine 5 will be described. As an example, the beveling machine 5 comprises a work table 6 for supporting the workpiece W, a workpiece fixing vise device 7 positioned opposite to the work table 6 above the work table 6, and a processing unit 8 for performing beveling on the workpiece W fixed on the work table 6 by the vise device 7, as its main components. Each of these components will be described in general terms below.

[0026] As shown in Figure 3 above, for example, the work table 6 has a free bearing table 61 on the front side of the work position (the side closer to the worker M, as described later), and a clamp table 62 extending from the front side of the work position. Furthermore, a stopper ruler 63 that can be extended and retracted vertically is provided at the front end of the clamp table 62. In order to accommodate the different lengths of the workpiece W to be processed, the work table 6 is often used with a width dimension of, for example, 3000 mm and a depth dimension (front-to-back length) of, for example, 600 mm.

[0027] Here, we will explain how to represent the length, width, front-to-back orientation, etc., of the workpiece W and the equipment involved in processing this workpiece W. The beveling jig 1 and beveling machine 5, which constitute the apparatus, and the workpiece W are not necessarily in the same direction when described as width, width dimension, length, or length. Furthermore, the description may differ for difficult-to-hold workpieces W, which will be described later. In the following text, the same symbol "W" will be used for difficult-to-hold workpieces and long workpieces, and these workpieces may also be simply referred to as "workpiece W". First, the front-to-back direction of the device is expressed as "depth" or "depth dimension" or "front-to-back," from the open side of the worktable 6 where the worker M will be positioned to the side where the workpiece W is clamped and held. The direction of the worker M's body when facing the device is expressed as "width direction" or "width dimension." In contrast, for example, in the case of a long workpiece W, the direction in which it extends is naturally expressed as the "longitudinal direction" or "length (dimension)," while the direction perpendicular to the longitudinal direction is expressed as the "width direction" or "width dimension." Thus, at least the expressions for the width direction differ by 90° between the device and the workpiece W.

[0028] Next, a vise device 7 that works in cooperation with the work table 6 to fix and hold the workpiece W will be described. The vise device 7 consists of a number of vise units 70 arranged in alignment in the width direction of the work table 6 on a frame 7F that is provided in a beam shape above the work table 6, as shown in Figure 2(b). The vise device 7 also uses a vise cylinder 71 driven by hydraulics or the like as its operating source, and consists of a vise rod 72 that extends downward, to which a vise plate 73 is pinned to the lower end so as to be able to swing somewhat. By pushing down the vise plate 73 through the action of the vise cylinder 71, the workpiece W placed on the clamp table 62 of the work table 6 is clamped and held between the vise device 7 and the clamp table 62.

[0029] Next, we will explain the processing unit 8. The processing unit 8 is a unit that directly performs beveling on the end of the workpiece W, and as shown in Figure 3, for example, its main components are a milling motor 8M and a milling cutter 81 that receives the output rotation of this motor. The machining unit 8 includes appropriate known frame members that allow for multidirectional movement. As an example, as shown in Figure 2, the movement directions include the X direction, which moves along the left-right direction of the work table 6 as a whole; the Y direction, which moves perpendicular to the X direction vertically; the Z direction, which moves perpendicular to the X direction vertically; and the tilting direction, which rotates clockwise or counterclockwise around a pivot point P located in close proximity to the milling cutter 81. These mechanisms are conventionally known configurations, and a detailed explanation is omitted.

[0030] When beveling a long, flat workpiece W using such a beveling machine 5, for example, the stopper ruler 63 is positioned to protrude above the clamp table 62, and the workpiece W is set on the clamp table 62 so that its front end (rear end) contacts the stopper ruler 63. Then, in this state, the vise device 7 is applied from above to fix the workpiece W on the clamp table 62 with the vise plate 73. Meanwhile, the milling cutter 81 in the processing unit 8 is set to a position corresponding to the specified groove dimensions, and then, while being driven by the milling motor 8M, it performs groove machining while moving horizontally along the workpiece W in the X direction. In Figure 2, the two processing units 8 are arranged side by side. This arrangement allows each processing unit 8 to accommodate different orientations of the beveling surface on the workpiece W. In other words, it is configured to perform both L-shaped and K-shaped beveling simultaneously.

[0031] In the example described above, we explained a system in which the vise device 7 can reliably hold the workpiece W. However, the workpieces W requested at beveling sites can come in various shapes, and difficult-to-hold workpieces W may be present, such as short and narrow pieces, or long pieces with narrow dimensions. In such difficult-to-hold workpieces W, direct and firm clamping with the existing vise device 7 becomes extremely difficult. Therefore, due to these circumstances, a beveling jig 1 specifically designed for difficult-to-hold workpieces W was developed, and this beveling jig 1 will be described below. Note that two types of beveling jig 1 are envisioned: a wide-type beveling jig 1A (see Figure 4) with a long width dimension, and a short-type beveling jig 1B (see Figure 6) with a short width dimension. The following description will begin with the configuration common to both types.

[0032] The beveling jig 1 is a jig for stably holding a difficult-to-hold workpiece W so that it does not shift during beveling. By using this beveling jig 1, the difficult-to-hold workpiece W can be firmly fixed and held on the work table 6, and consequently, the milling cutter 81 can perform accurate beveling on the end face of the workpiece W. The jig body 10 that constitutes the beveling jig 1 is, as an example, shown in Figures 1(b) and 4, comprised of a base substrate 2, a pressing plate 3 that is separately configured from the substrate 2 and is placed above the substrate 2 in an overlapping state with an appropriate gap between them, and a guide plate 4 that is placed between the substrate 2 and the pressing plate 3 and has a thickness thinner than the minimum thickness dimension of the workpiece W to be processed. The front end of the jig body 10 is designated as the workpiece clamping section 11 (see enlarged view in Figure 1(b)). This section is composed of a substrate clamping end 20 and a presser plate clamping end 30, both of which have relief inclines to avoid interference with the milling cutter 81 during beveling. Specifically, a substrate relief incline 21 is formed on the substrate clamping end 20, and a presser plate relief incline 31 is formed on the presser plate clamping end 30. On the other hand, an adjustment piece 36 for setting the distance between the substrate 2 and the retaining plate 3 is provided towards the rear of the jig body 10, and this adjustment piece 36 will be described later.

[0033] In this invention, the difficult-to-hold workpiece W that is the target of processing is not necessarily a regularly requested processing item in real-world work environments, and the shape of the workpiece W is not constant. For this reason, it is not practical to provide automation or weight reduction support devices when handling the beveling jig 1. Therefore, it is preferable that the beveling jig 1, either as a whole or with the substrate 2 and press plate 3 separated, has a weight that can be manually set up by the operator M, i.e., a portable weight. Specifically, the beveling jig 1 should be approximately 23 kgf or less, and more preferably approximately 11 kgf or less.

[0034] Furthermore, in the embodiment of the jig body 10 shown in Figures 1(b) and 4 above, a single substrate 2 is fitted with two divided retaining plates 3A, one example divided in the width direction, which are fitted together to cover the top of the substrate 2. The total width dimension of the two divided retaining plates 3A placed side by side relative to the width dimension of the substrate 2 is considered the equal-width reference dimension. Naturally, whether the retaining plate 3 is composed of a combination of multiple divided retaining plates 3A or a single retaining plate 3, it is not required that the retaining plate 3 be strictly of equal width when covering the entire width of the substrate 2. Therefore, the expression "fitted together to an equal-width reference dimension" is used to include this meaning. In other words, when it is said that the substrate 2 and the retaining plate 3 are fitted together to an equal-width reference dimension, it means that the substrate 2 and the retaining plate 3 are formed to the same width dimension. Furthermore, in this embodiment, each dividing retaining plate 3A has a partition slit 32 formed from the front end to partway towards the rear end, and the narrow portion partitioned by this partition slit 32 is designated as the dividing retaining plate 3B. An adjustment piece 36 is provided behind each of these dividing retaining plates 3B (the adjustment piece 36 will be described later).

[0035] Next, we will describe the details of the substrate 2, the retaining plate 3, and the ruler plate 4, and then describe their combined structure. As described above, the substrate 2 is provided with a substrate clamping end 20 on the workpiece clamping portion 11, and a substrate relief inclination 21 on the lower side of the substrate clamping end 20. On the other hand, a guide chamfer 22 is formed on the upper side of the substrate clamping end 20 (see enlarged view in Figure 1(b)), which facilitates the insertion and setting of the workpiece W. Furthermore, a receiving piece 45 for stably holding the workpiece W is detachably fixed to the substrate clamping end 20, and numerous receiving piece setting female threads 23 are formed in the width direction for fixing the receiving piece. A receiving piece fixing bolt 23B is screwed into these receiving piece setting female threads 23 to fix the receiving piece 45 in the desired position. The receiving piece 45 is attached in contact with the side of the workpiece W where the beveling process is progressing, in order to prevent the workpiece W from moving (shifting) during beveling.

[0036] Furthermore, on both the left and right sides of the base plate 2, as shown in Figure 5(a), for example, there are two ruler setting female screws 24 in the front-to-back direction (a total of four locations), into which ruler fixing bolts 24B are screwed to fix the ruler plate 4, which will be described later, in the desired position. In other words, the ruler plate 4 is configured to slide on the base plate 2 in the front-to-back direction (depth direction) by loosening the ruler fixing bolts 24B screwed into the ruler setting female screws 24. Once the installation position of the ruler plate 4 is determined, the ruler fixing bolts 24B are tightened to fix the position of the ruler plate 4. Furthermore, to clearly indicate the installation position of the ruler plate 4, indicators 25 are provided over a certain area of ​​the circuit board 2 (see Figure 4(b)). These indicators 25 are provided on the top and side surfaces of the circuit board 2 (referred to as the top indicator 25U and the side indicator 25S), and are configured so that the setting position of the ruler plate 4 can be observed from either the top or the side.

[0037] Furthermore, on the front side of the substrate 2, there is an adjustment piece guide hole 26 for guiding the adjustment piece 36 provided on the lower surface of the retaining plate 3. This hole receives the knock sleeve 37 (described later) that is held in place by the adjustment piece 36 (see Figure 1(b)), allowing the substrate 2 and the retaining plate 3 to be assembled in the correct position. Furthermore, two operating grips 27 are provided on the front end face of the substrate 2, for example, to facilitate manual operations such as pushing and pulling. Also, assuming manual or portable operation, it is preferable that the substrate 2 itself be lightweight. For example, as shown in Figure 4(b) above, it is preferable to provide a weight-reducing section 28 in the central part of the substrate 2 in a plan view, to the extent that it does not impair strength.

[0038] Next, we will explain the retaining plate 3. As described above, the clamping end 30 of the clamping plate 3 is provided with a clamping plate relief inclination 31 (see Figure 1(b)). On the other hand, an adjustment piece retaining female screw 35 is formed on the front side of the retaining plate 3, and the adjustment piece 36 is provided on the lower surface of the retaining plate 3 in this area. The adjustment piece 36 is a ring-shaped component, and several types of adjustment pieces 36 with approximately the same height are available depending on the thickness of the workpiece W to be beveled. Specifically, in addition to the so-called 6mm thick 6t, four types of adjustment pieces 36 are available: 9t, 12t, and 16t, and the adjustment piece 36 with the appropriate thickness (height) is selected according to the thickness of the workpiece W.

[0039] Furthermore, a knock sleeve 37 is placed below the adjustment piece 36, and in this state, the adjustment piece retaining bolt 35B is screwed into the adjustment piece retaining female thread 35, thereby fixing both the knock sleeve 37 and the adjustment piece 36 together. Naturally, the outer diameter of the knock sleeve 37 is set to be slightly smaller than the diameter of the adjustment piece guide hole 26 in the base plate 2. In addition, the lower end protruding side of the adjustment piece retaining bolt 35B is formed in a tapered shape, so that it can be smoothly inserted into the adjustment piece guide hole 26 during assembly.

[0040] Next, we will explain the components that perform the guiding function, including the guiding plate 4. The guide plate 4 is a flat plate-shaped member whose end face on the workpiece clamping portion 11 side is the guide plate working end 41, and its thickness is formed to be thinner than the minimum thickness of the workpiece W held by the beveling jig 1. As shown in Figures 4(b) and 5(a) as an example, this ruler plate 4 has two elongated ruler setting holes 42 extending in the depth direction on the left and right sides, and its cross-sectional shape is formed in the shape of a T-slot. Furthermore, the ruler plate 4 has straight setting guidelines 43 formed on both the left and right sides, an upper setting guideline 43U formed on the upper surface of the ruler plate 4, and a side setting guideline 43S formed on the side of the ruler plate 4. Of these, the upper setting guideline 43U is formed on both sides of a long, open viewing hole 44, and the upper indicator 25U is provided so that it can be seen from above through the viewing hole 44.

[0041] Then, using the indicator 25 and the setting guideline 43, the ruler plate 4 can be positioned in the predetermined location. Specifically, with the ruler plate 4 temporarily placed on the substrate 2, the ruler fixing bolt 24B is loosely tightened, and in this state, for example, when observing from above, the scale of the top indicator 25U, which can be seen through the viewing hole 44, is used as a guide to slide the ruler plate 4 back and forth to align the top setting guideline 43U with an appropriate value. The holding position of the workpiece W is determined by fine-tuning the ruler plate 4 in this way, and then the ruler fixing bolt 24B is fully tightened. When fine-tuning the ruler plate 4, it is desirable to observe the ruler plate 4 not only from above, but also from the side, that is, to confirm that the side setting guideline 43S is aligned with an appropriate numerical scale on the side indicator 25S.

[0042] Next, we will describe the receiving piece 45, which is used to accurately hold the workpiece W, in addition to the ruler plate 4 mentioned above. As described above, the receiving piece 45 is attached in contact with the side of the workpiece W where the beveling process is progressing, and prevents the workpiece W from moving (slipping) during beveling. In other words, the receiving piece 45, together with the guide plate 4, is a component that essentially performs a guide function, and as shown in Figure 5(b) as an example, it is formed in a shape that can be described as a U-shape in plan view, with one end open in plan view, and the space in the open central part is designated as the fixed receiving slot 45a. Furthermore, the end face of the receiving piece 45 on the closed side of this fixed receiving slot 45a is designated as the receiving surface 45b, and this receiving surface 45b contacts the workpiece W to prevent its movement (slipping). Incidentally, in order for a workpiece W with a short width dimension (a difficult-to-hold workpiece W) to withstand the load during beveling and be held securely, for example, the length dimension must be about 200 mm, or in other words, the clamping action length must be 200 mm, otherwise a reliable holding effect by the clamping plate 3 cannot be expected. For this reason, in the case of a workpiece W with a short width dimension, the receiving piece 45 in the direction of beveling is used to prevent the difficult-to-hold workpiece W from shifting during beveling. Furthermore, the bottom surface of the receiving piece 45 is formed in a flat shape and is configured to be in close contact with the substrate 2 at the substrate clamping end 20. This portion is designated as the reference bottom surface 45c, and a contact projection 45d is formed at the front end of the reference bottom surface 45c, extending downward from the reference bottom surface 45c. This contact projection 45d abuts against the front edge of the substrate clamping end 20 of the substrate 2, thereby maintaining the receiving position of the receiving piece 45 itself. In addition, the receiving piece 45 has a relief chamfer 45e formed only at its front end, which is cut diagonally in a side view, to avoid interference with the milling cutter 81 during beveling.

[0043] The above describes an example of the beveling jig 1 of the present invention, particularly a basic wide-type beveling jig 1A. Now, an example of a short-type beveling jig 1B will be described based on Figure 6. The basic configuration of the short-width type beveling jig 1B is the same as that of the wide-width type beveling jig 1A already described. Therefore, the differences will be explained below. The short-width type beveling jig 1B is used, for example, when the jig width dimension is about 100 mm or less, to hold one or two short, difficult-to-hold workpieces W, or when the wide-width type beveling jig 1A described above is used, but the jig width dimension is insufficient for the length dimension (longitudinal dimension) of the workpiece W, causing the workpiece W to protrude from the beveling jig 1A.

[0044] This short-width type beveling jig 1B has a small overall shape, which reduces the weight burden during operation. To further improve this ease of handling, operating holes are provided on the substrate 2 and the presser plate 3 on the side in front of the adjustment piece 36, and these are called the substrate operating hole 29 and the presser plate operating hole 39. The shape of these operating holes (substrate operating hole 29 and presser plate operating hole 39) is formed to have a width dimension that allows the operator M to grip and operate them. Incidentally, when each operating hole is gripped, the presser plate 3 uses the adjustment piece 36 as a pivot point, and the clamping end 30 of the presser plate rises upward, expanding the workpiece clamping portion 11, and as a result, it becomes easier to insert the workpiece W into this workpiece clamping portion 11.

[0045] The beveling jig 1 of the present invention has the basic structure described above, and its operation will be explained below. Wide-type beveling jig As described above, various embodiments of the beveling jig 1 are conceivable, but first, the operation of the wide-type beveling jig 1A shown in Figures 1(b) and 4 will be explained. In this wide-type beveling jig 1A, for example, for a substrate 2 with a width of several hundred mm, the pressing plate 3 is composed of two divided pressing plates 3A divided in the center in the width direction, and each divided pressing plate 3A has a partition slit 32 formed in the middle in the width direction. That is, the partition slit 32 is formed so as to be cut into one of the divided pressing plates 3A in the center in the width direction, from the front end to the rear end, and in this case, a configuration is adopted in which a total of four divided pressing plates 3B are arranged in parallel. Furthermore, the workpiece W to be processed will have a length (longitudinal dimension) close to the width dimension of the beveling jig 1.

[0046] [1] <Adjustment piece setting procedure> At the start of the operation, the retaining plate 3 is removed from the circuit board 2, while the guide plate 4 remains placed on the circuit board 2 (this is the initial state). Then, in order to place the retaining plate 3 on top of the circuit board 2, the first step is to attach the adjustment piece 36 to the retaining plate 3. In the process of attaching the adjustment piece 36 to the retaining plate 3, the knock sleeve 37 and the adjustment piece 36 are attached to the lower surface of the retaining plate 3 using the adjustment piece holding bolt 35B. The adjustment piece 36 is selected to have a thickness that is the same as or very close to the thickness dimension of the workpiece W to be processed. Specifically, several adjustment pieces 36 with different height dimensions are provided in advance, and the appropriate one is selected according to the thickness dimension of the workpiece W. If necessary, spacer members such as washers can be interposed to adjust the thickness dimension. Furthermore, the adjustment piece holding bolt 35B (knock sleeve 37) has a tapered shape at the portion that protrudes below the adjustment piece 36. This tapered tip fits into the adjustment piece guide hole 26 of the substrate 2, thereby precisely positioning the retaining plate 3 relative to the substrate 2, and in this state, it is precisely assembled to the substrate 2.

[0047] [2] <Setting up the ruler board> In addition, as part of this process, the ruler plate 4 is set (re-set) in an appropriate position on the circuit board 2. This is to allow the workpiece edge (workpiece edge to be processed) to protrude to a desired dimension in the workpiece clamping portion 11, depending on the beveling process applied to the workpiece W. This involves first moving the guide plate 4 while checking the indicator 25 according to the protrusion dimension. Specifically, as shown in Figure 5(a) as an example, the guide fixing bolt 24B is loosened to make the guide plate 4 movable, and then the guide plate 4 is slid so that the setting guide line 43 aligns with the appropriate scale on the indicator 25. Once the guide plate 4 is in the predetermined position, the guide fixing bolt 24B is tightened to fix it in the predetermined setting position. When holding the workpiece W with the workpiece clamping part 11, the edge of the workpiece opposite to the side to be bevel is pressed against the guide plate 4 fixed as described above, and as a result, the workpiece W can be set to a predetermined protrusion dimension (protrusion dimension from the workpiece clamping part 11). Conversely, as described above, when holding the workpiece W with the workpiece clamping part 11, the guide plate 4 is installed and fixed on the base plate 2 so that the protrusion dimension of the workpiece W is the desired value.

[0048] [3] Setting up the work (1) Furthermore, in this embodiment, the workpiece W is held in the workpiece clamping section 11 by arranging two pressing plates 3 side by side above the substrate 2. As a result, the workpiece W is held between the substrate 2 and the pressing plates 3 from above and below within the workpiece clamping section 11. Furthermore, since an adjustment piece 36 with approximately the same thickness as the workpiece W is provided on the front side of the retaining plate 3 (see Figure 1(b)), the retaining plate 3 is installed in a state that remains parallel to the substrate 2 when viewed from the side. The work up to this point, namely the workpiece clamping section 11, is performed on the front free bearing table 61 on the work table 6. After that, the jig body 10 with the workpiece W set on it is pushed towards the front clamp table 62. At this time, the beveling machine 5 has the stopper ruler 63 protruding above the table surface, and the edge of the workpiece W (the edge to be processed set to protrude) is brought into contact with it, thereby allowing the workpiece W to be clamped in the correct position.

[0049] [4] Clamping the workpiece; beveling. The component that directly exerts the holding force when clamping and holding the workpiece W is the vise device 7 already installed on the beveling machine 5. This vise device 7 has, for example, more than a dozen vise units 70 installed for a machining allowance width of 3000 mm or more. Therefore, in the embodiment shown in Figures 1(a) and 2(b), for example, two of these vise units 70 are operated to push the pressing plate 3 from above, and the workpiece W positioned between the substrate 2 and the pressing plate 3 is firmly clamped and held. Then, in this state, cutting is performed by the milling cutter 81 on the beveling machine 5 to perform beveling on the edge of the workpiece W. Note that the beveling itself is operated by an existing device, so a detailed explanation is omitted. Subsequently, when continuing to perform beveling on workpieces W of the same specifications, the adjustment piece 36 is already set, so the jig body 10 can be used to insert the next workpiece W into the workpiece clamping section 11 in its current state. At this time, a guide chamfer 22 is formed on the substrate clamping end 20 (see Figure 1(b)), and the presence of this guide chamfer 22 makes it easier to insert the workpiece W. Of course, the press plate 3 itself has a considerable weight due to strength requirements, and when setting the workpiece W, it is possible to make the workpiece W setting work easier by, for example, inserting a tool that widens the gap between the press plate 3 and the substrate 2 towards the front of the press plate 3.

[0050] [5] Setting the workpiece (2); When the workpiece is longer than the jig width Next, we will explain how to set up the workpiece W when its length (longitudinal dimension) is longer than the width dimension of the beveling jig 1 (wide-type beveling jig 1A). In this case, as shown in Figure 7 as an example, the workpiece W protrudes from the wide-type beveling jig 1A, so a short-type beveling jig 1B is provided on this protruding portion (for example, on the side where beveling is progressing). This allows the workpiece W to be clamped and held along its entire longitudinal length, enabling stable beveling. In the case of a long workpiece W as described in the previous section, although there are some difficulties in holding it in the width direction of the workpiece, it is held sufficiently stably because it is held over the entire longitudinal direction (device width direction). Also in this case, as shown in the enlarged view of Figure 7 above, if the beveling jig 1B has a guide chamfer 22, the beveling jig 1B can easily grip the workpiece W (the portion that protrudes from the width dimension of the beveling jig 1A).

[0051] [6] Setting up the difficult-to-hold workpiece and installing the receiving piece. On the other hand, a small, difficult-to-hold workpiece W, for example, is a small workpiece W with short dimensions in both the width and length directions. When processing multiple such workpieces W, as an example, a wide-type beveling jig 1A, as shown in Figures 4 and 5, is used, and an appropriate number of workpieces W are placed at regular intervals. Then, a support piece 45 is set on the side of the workpiece W as the beveling process is progressing to prevent the workpiece W from shifting during beveling. The receiving piece 45 is secured by selecting one of the numerous receiving piece setting female threads 23 provided at the tip of the substrate 2 and tightening it with a receiving piece fixing bolt 23B. As a result, the end face of the workpiece W on the machining side comes into contact with the receiving piece 45, preventing the workpiece W from shifting. At the same time, the receiving piece 45 comes into contact with the tip edge of the substrate 2 at a contact projection 45d that protrudes downward from the reference bottom surface 45c, preventing the receiving piece 45 itself from shifting. In actual operation, it is preferable to set up the receiving pieces 45 in advance, taking into account the number of small, difficult-to-hold workpieces W to be processed, and then position the workpieces W accordingly.

[0052] [7] Short-width type jig for beveling Furthermore, in the short-width type beveling jig 1B, as shown in Figure 6 above as an example, both the substrate 2 and the presser plate 3 are short in width, and both are provided with a substrate operation through-hole 29 and a presser plate operation through-hole 39 on the front side. The width dimensions of these substrate operation through-holes 29 and presser plate operation through-holes 39 are carefully considered to accommodate the operating width of the operator M's hand, and these are used as a guide to move the jig body 10 and set the workpiece W. Specifically, when the substrate 2 and presser plate 3 are already set up stacked vertically, when the operator M grips the substrate 2 and presser plate 3 with one hand to insert the workpiece W into the workpiece clamping section 11, the presser plate 3 lifts up on the workpiece clamping section 11 side, using the adjustment piece 36 as a fulcrum, as if widening its mouth, making it easy to insert the workpiece W into the workpiece clamping section 11.

[0053] [8] Control system for beveling machine In existing beveling machines 5, input instructions for processing status are also made by numerical input. However, when using the beveling jig 1 of the present invention, the reference height position of the workpiece W will differ by the thickness dimension of the substrate 2 of the beveling jig 1. Therefore, when using the beveling jig 1, a program is provided in advance to change the zero point reference, taking into account the height difference of the workpiece W. As a result, when giving work instructions, once it is set that the processing will be done using the beveling jig 1, the subsequent processing can be carried out as usual by simply inputting the thickness of the workpiece W. [Explanation of symbols]

[0054] 1. Beveling jig 1A Wide-type beveling jig 1B Short-width type jig for beveling 2 circuit boards 3. Pressing plate 3A Split retaining plate 3B Sectional retaining plate 4 Ruler board 5 Beveling machine 6 Work Tables 7. Vice device 7F Frame 8 Processing Units 8M Milling Motor 10. Jig body 11 Workpiece clamping section 20 Board clamping end 21 Circuit board relief incline 22 Guide chamfer 23 Receiving piece setting female thread 23B Receiving piece fixing bolt 24 Ruler setting female thread 24B Ruler fixing bolt 25 Indicators 25U Top-mounted indicator 25S Side Indicator 26 Adjustment piece guide hole 27. Operating Grip 28. Weight reduction section 29 Substrate operation through-holes 30 Clamping end of the retaining plate 31 Relief plate slope 32 partition slits 35 Adjustment piece holding female screw 35B Adjustment piece retaining bolt 36 Adjustment piece 37 Knox Sleeves 39. Through-hole for operating the retaining plate 41 Ruler working end 42 ruler setting holes 43. Configuration Guidelines 43U Top-Mount Configuration Guidelines 43S Side-Mounting Configuration Guidelines 44 Transparent hole 45 Defending piece 45a Fixed receiving slot 45b Receiving surface 45c standard base 45d tactile protrusion 45e Relief chamfer 61 Free bearing table 62 Clamp Table 63. Stopper ruler 70 Vice Units 71 Vice Cylinder 72 Vice Rod 73 vise plate 81 Milling Cutter P Rotation Center M worker Double job

Claims

1. A beveling jig for applying a milling cutter to a difficult-to-hold workpiece fixed on a work table to perform beveling on the end face of the workpiece, The jig body that makes up this is circuit board and A retaining plate is configured separately from this substrate and is assembled on top of the substrate in an overlapping manner with a gap between them, These include a guide plate that is thinner than the minimum thickness dimension of the workpiece and is placed between the substrate and the pressing plate. The front end of the jig body serves as the workpiece clamping section, and the base plate and the pressing plate in this workpiece clamping section are formed with a relief angle to avoid interference with the milling cutter during beveling. On the other hand, the jig body is provided with an adjustment piece towards the rear for setting the distance between the substrate and the pressing plate, and the pressing plate is configured to hold the workpiece in the workpiece clamping part when pressed by the vise device already installed in the beveling machine, thus providing a jig for beveling difficult-to-hold workpieces.

2. The jig for beveling a difficult-to-hold workpiece, as described in claim 1, is characterized in that a receiving piece for preventing displacement of a difficult-to-hold workpiece is provided at the front end of the substrate, with a selectable installation position.

3. The jig body is composed of a single substrate and a single pressing plate, and these are configured to have equal width reference dimensions, characterized in that it is a jig for beveling a difficult-to-hold workpiece according to claim 1 or 2.

4. The jig body is characterized in that a plurality of divided retaining plates, each divided in the width direction, are combined with a single substrate at a reference width. This is a jig for beveling a difficult-to-hold workpiece, as described in claim 1 or 2.

5. The jig for beveling a difficult-to-hold workpiece, as described in claim 1 or 2, is characterized in that the pressing plate has partition slits that divide it in the width direction, and each of the partitioned pressing plates separated by these partition slits is provided with an adjustment piece towards the rear.

6. The jig body of which the aforementioned single substrate and single pressing plate are of equal width standard dimensions, wherein the substrate and pressing plate are provided with an operating through hole behind the adjustment piece, and the width of the operating through hole is set to a width dimension that allows the operator's hand to grip it, as described in claim 3, for beveling a difficult-to-hold workpiece.

7. The ruler plate is fixed to the substrate so as to be adjustable in the front-to-back direction, and setting guidelines are provided on the top surface and side surface of the ruler plate, while the substrate is provided with an indicator for the top surface and an indicator for the side surface at positions close to the setting guidelines, characterized in that the jig for beveling a difficult-to-hold workpiece is as described in claim 1 or 2.

8. The jig body is characterized in that its weight is within the range of a worker's carrying capacity, as described in claim 1 or 2, for beveling a difficult-to-hold workpiece.

9. A work table for supporting difficult-to-hold workpieces, A machining unit that moves along a difficult-to-hold workpiece fixed on this worktable, The system includes a vise device provided opposite to the work table above the work table for fixing difficult-to-hold workpieces, A beveling machine that performs beveling on the end face of a difficult-to-hold workpiece fixed on a work table using a milling cutter provided in the processing unit, This beveling machine can be placed on a work table and holds difficult-to-hold workpieces by pressing the vise device. A beveling machine characterized by comprising a jig for beveling a difficult-to-hold workpiece as described in claim 1 or 2.

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