JPH08290313A - Chamfering machine - Google Patents

Abstract

PURPOSE: To chamfer a workpiece automatically with efficiency and accuracy. CONSTITUTION: A conveyor frame 41 is provided with carrier rollers 42 for conveying a plate-like workpiece W. A pressing roller 69 for conveying the workpiece W while holding it together with the carrier rollers 42 is provided above the carrier rollers 42. A guide roller set 44 is further provided to guide so that the end face of the workpiece W passes a specified cutting position. The pressing roller 69 presses the workpiece W to the guide roller set 44. The end face corner of the workpiece W is chamfered during the conveyance of the workpiece W.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chamfering machine for chamfering a corner of an end face of a plate-shaped work made of steel or the like.

[0002]

2. Description of the Related Art For example, a steel sheet for construction is applied with an antiseptic coating on its surface. In this case, if the antiseptic coating is applied to the steel sheet as it is shipped from the factory, the antiseptic coating may be peeled off due to deformation such as thermal expansion or thermal contraction concentrated on the corner edge of the steel sheet. is there. Also, if the corner edge hits another steel material during construction work, for example, not only will the edge portion be greatly deformed and the paint will peel off, but also other steel materials and building parts hit by the edge will be damaged. Get stuck.

[0003]

For this reason, it is preferable to chamfer the edges of the steel sheet, but conventionally, this chamfering work was performed manually at a construction site using a grinder or the like. There was a problem that the work efficiency was extremely low and the processing accuracy was low.

An object of the present invention is to provide a chamfering machine capable of extremely efficiently chamfering an end surface of a work with high precision.

[0005]

In order to achieve the above object, in the invention of claim 1, the conveying means for conveying a plate-like work from above and below in one direction and the end surface of the work are provided. It is provided with a guide means for guiding the workpiece so as to pass through a predetermined cutting position, and a cutting means for chamfering and cutting the corner of the end face of the workpiece as the workpiece is conveyed.

According to a second aspect of the present invention, in the first aspect of the present invention, a permitting means for permitting the movement is provided so that the contact portion of the conveying means with the work upper surface can move in accordance with the shape of the work upper surface. It is a thing.

According to a third aspect of the present invention, in the first or second aspect of the invention, the cutting means is configured so as to follow the displacement of the corner position of the work end surface.

[0008]

According to the first aspect of the invention, the work is automatically fed in one direction by the conveying means, and its end face is guided so as to pass through the cutting means. Therefore,
The cutting means automatically chamfers the corners of the end face of the work.

According to the second aspect of the present invention, even if the work is curved and its upper surface is not flat, the conveying means follows the unevenness of the upper surface by the action of the permitting means to ensure the feeding of the work. Done.

According to the third aspect of the present invention, even if the end face corner is displaced in the thickness direction or the width direction of the work due to the curvature of the work, the cutting means follows the displacement, and the chamfering cutting is performed reliably. Be seen.

[0011]

EXAMPLES A chamfering machine embodying the present invention will be described below. As shown in FIGS. 1 to 3, the chamfering machine according to this embodiment moves the work W in one direction (direction of arrow L in FIG. 2).
A transport mechanism 31 as a transport means for transporting the workpiece W, a holding mechanism 32 for holding the work W from above, and a cutting mechanism 33 for performing corner chamfering cutting of the end surface of the work W.
It consists of. The pressing mechanism 32 also serves as a conveying unit and a guiding unit. Therefore, the configuration of each mechanism will be described in detail below.

First, the transport mechanism 31 will be described. A large number of transport rollers 42 are supported on the upper surface of the transport unit frame 41. As shown in FIG. 6, these transport rollers 42 are driven by a lower transport motor 43 to drive the belt 4 to move.
0, the rotating shaft 39, the cord-shaped belt 38, and the like to rotate in one direction. Note that the rotation of the transport motor 43 does not have to be transmitted to all the transport rollers 42, but may be transmitted to at least the transport rollers 42 that do not correspond to the pressing roller 69 described later. The work W is transported in the horizontal horizontal direction according to the arrow L by the rotation of the transport roller 42. In this chamfering machine, the lower side of FIG. 2 is the front and the upper side is the rear.

As shown in FIG. 4, a lower cutter 1 which will be described later.
On the carry-in side of 23, a gap 37 is formed between the front end of the transport roller 42 and the transport unit frame 41. The gap 37 is for avoiding buffering between the burr existing at the edge of the work W before chamfering cutting and the transport roller 42. As shown in FIG. 4, the transport rollers 42 at positions corresponding to upper and lower cutters 100 and 123, which will be described later, are configured by a long transport roller 42a supported by both ends and a short transport roller 42b supported by a cantilever. ing. The shaft of the transport roller 42 does not exist below the upper and lower cutters 100 and 123, and the cutting chips fall without hitting the shaft. As shown in FIGS. 1 and 3, a chute 36 for guiding cutting chips is arranged below the conveying roller 42b, and a box 35 for accommodating cutting chips is installed below the chute 36. .

As shown in FIGS. 2 and 4, a guide plate 59 for guiding the end surface of the work W is fixed to the carrying frame 41 on the carrying-in side of an upper cutter 100, which will be described later.

As shown in FIG. 4, three guide roller sets 44, each having three rollers, are provided in the transport unit frame 4.
It is attached to the center rear part of 1 and guides the end surface of the conveyed work W.

As shown in FIGS. 4 and 5, the pair of optical sensors 45 and 46 are arranged at the central portion of the carrier frame 41.
The light beams from the optical sensors 45 and 46, which are arranged at positions separated in the transport direction, are reflected by the reflection plates 47 and 48 through the gap between the transport rollers 42, and the optical sensors 45 and 4
Light is received at 6. The optical sensors 45 and 46 are for detecting the work W.

As shown in FIG. 6, an encoder 55 having a counter roller 52 is arranged at the side edge of the conveying unit frame 41 so that the passing length of the work W, that is, the cutting length can be counted.

Next, the structure of the pressing mechanism 32 will be described.
As shown in FIGS. 1 to 3, the pressing frame 61 is erected at the center of the carrying section frame 41, and a fixing plate 60 is fixed to the upper surface thereof. As shown in FIGS. 7 and 8,
The pair of guide cylinders 62 are fixed to the fixed plate 60, and the guide rods 63 are vertically slidably inserted therein. A bar 64 connects the upper ends of the guide rods 63. A holding cylinder 65, which is an air cylinder, is fixed to the upper surface of the fixed plate 60, and its piston rod is connected to the bar 64. The holding cylinder 65 allows both guide rods 63 to be inserted through the bar 64.
Is moved up and down. The plurality of gas springs 67 are fixed plates 6
It is connected between 0 and the bar 64, and gives upward elastic force to the guide rod 63.

The roller frame 68 is the guide rod 6
The roller frame 68 is fixed between the lower ends of the rollers 3, and a plurality of pressing rollers 69 are supported on the roller frame 68 via shafts 72, as shown in FIGS. A lifting force by the gas spring 67 is constantly applied to the roller frame 68, and the roller frame 68 is moved up and down via the bar 64 and the guide rod 63 by the drive of the pressing cylinder 65, and the upward moving position is the stopper 71. Regulated by When the roller frame 68 moves downward, the pressing roller 69 presses the upper surface of the work W on the conveying roller 42, as shown in FIG.

The pressing roller 69 is rotated in one direction via the gear mechanism 70 and the shaft 72 by the drive of the upper conveying motor 51 attached to the roller frame 60, and the work W
A conveying force is applied to the. As shown in FIG. 4, the pressing roller 69 is arranged on a line L1 slightly inclined in a plane with respect to the conveyance direction line L by the conveyance roller 42,
As the work W is conveyed, the guide roller set 44 is provided.
It is designed to be pressed against. Therefore, the work W is guided so as to pass through the predetermined guide position by the guide roller set 44. Therefore, the guide roller set 44
The pressing roller 69 constitutes a guide means.

As shown in FIG. 10, a cushion material 73 made of a rubber ring is interposed between the outer peripheral surface of the shaft 72 of the pressing roller 69 and the inner peripheral surface of the pressing roller 69, and the cushion material 73 is provided. A gap 74 is formed to allow the pressing roller 69 to move due to the deformation. Therefore, the rotation of the shaft 72 is transmitted to the pressing roller 69 via the cushion material 73. In addition, even if the work W is curved or has unevenness formed on the upper surface of the work W, the pressing roller 69 moves within the range of the gap 74 against the elasticity of the cushion material 73.
Firmly press the top surface of the work W. Therefore, the cushion material 73 and the gap 74 constitute a permitting means for permitting the vertical movement of each pressing roller 69.

As shown in FIGS. 1 and 7, the fall prevention roller 75 is arranged at the rear end of the pressing roller 69 group in the conveying direction, and when the work W comes out of the pressing roller 69 group, the fall prevention roller 75 is formed. Is in contact with the upper surface of the work W, and the roller frame 68 including the pressing roller 69 is prevented from being suddenly dropped.

Next, the structure of the cutting mechanism 33 will be described. As shown in FIG. 12, the cutting mechanism 33 includes the upper processing unit 8
1 and the lower processing unit 110, the configuration of the upper processing unit 81 will be described first. FIG.
As shown in FIGS. 1 and 12, the lower frame 82 is arranged and fixed to the front portion of the transport unit frame 41, and a pair of rails 83 extending in the front-rear direction is laid on the upper surface thereof.
The moving frame 84 is supported on the rail 83 so as to be movable back and forth, and is moved back and forth along the rail 83 by a front and rear moving cylinder 85 which is an air cylinder. The front moving end and the rear moving end of the moving frame 84 are stoppers 86 and 8 respectively.
Regulated by 7.

A pair of guide cylinders 88 are fixed to the upper part of the moving frame 84, and guide rods 89 are vertically movably inserted therein. A bar 90 connects the upper ends of the guide rods 89. An elevating cylinder 91, which is an air cylinder, is fixed on the bar 90, and its piston rod 92 is fixed on the upper surface of the moving frame 84. And the piston rod 9 of the lifting cylinder 91
By the protrusion of 2, the lifting cylinder 91 is raised together with the bar 90 and the guide rod 89. Lifting cylinder 9
1, the bar 90, the guide rod 89, and the like are lowered by the weight of them and the elevating frame 93 described later.

An elevating frame 93 is fixed between the lower ends of both guide rods 89, and a pair of guide holes 94 extending in the front-rear direction are formed therein. The processing frame 95 is supported by the guide hole 94 through a pair of guide rods 96 so as to be movable back and forth. The front moving end and the rear moving end of the processing frame 95 are restricted by the rear surface and the front surface of the elevating frame 93, and the amount of movement of the processing frame 95 in the front-back direction is small. As shown in FIG. 13, the spring 101 biases the processing frame 95 forward.

As shown in FIGS. 13 and 14, an upper processing motor 97 is fixed to the processing frame 95.
The upper processing shaft 98 is supported by the processing frame 95 and is rotated by the upper processing motor 97. The roller 99 is supported by the tip of the upper processing shaft 98 so as to be freely rotatable, and the upper cutter 100 as a cutting means is supported so as to be integrally rotatable with the upper processing shaft 98. A pair of rollers 102 are rotatably supported by the processing frame 95 on both sides of the upper cutter 100.

The lowering of the elevating frame 93 by its own weight causes the roller 99 to come into contact with the upper surface of the work W to position the upper cutter 100 in the vertical direction. Further, the pair of rollers 102 come into contact with the end surface of the work W by the urging force of the spring 101, and the upper cutter 100 is positioned in the front-rear direction. In this state, the work W conveyed on the conveyance roller 42 by the upper cutter 100.
The corners on the upper side of the are chamfered as shown in FIG. The stopper 103 is attached to the processing frame 95, engages with a part of the pressing frame 61, and restricts the downward movement position of the upper cutter 100 beyond the cutting position.

Next, the structure of the lower processing unit 110 will be described. As shown in FIGS. 12 and 15, a support frame 111 is supported on the moving frame 84 via a support shaft 112 so as to be rotatable in the vertical direction, and a connecting lever 113 is attached to one end thereof. An elevating cylinder 114, which is an air cylinder, is fixed to the lower part of the moving frame 84, and its piston rod is connected to one end of the connecting lever 113. Therefore, the support frame 111 is rotated in the up-down direction via the connecting lever 113 by the protrusion and retraction of the piston rod of the lifting cylinder 114.

As shown in FIGS. 15 and 16, the support frame 111 is formed with a pair of upper and lower guide holes 116. The machining frame 117 is supported by the guide rod 118 in the guide hole 116 of the support frame 111 so as to be movable back and forth. The front moving end and the rear moving end of the working frame 117 are restricted by the rear surface and the front surface of the support frame 111, and the moving amount of the working frame 117 in the front-back direction is small. The spring 119 is the processing frame 11
7 is being urged forward. Processing frame 117
A lower processing motor 120 is fixed to the.

The lower processing shaft 121 is supported by the processing frame 117 and rotated by the lower processing motor 120.
A roller 122 and a lower cutter 123 are supported on the lower processing shaft 121, like the roller 99 and the upper cutter 100 of the upper processing shaft 98. Lower cutter 123
A roller 124 similar to the roller 102 is supported on both sides of the roller.

The stopper 125 is attached to the processing frame 117 and engages with a part of the carrying section frame 41 to regulate the forward moving end of the lower processing unit 110. The stoppers 126 and 127 shown in FIG. 12 regulate the vertical rotation position of the processing frame 117, respectively.

Then, by the action of the lifting cylinder 114, the roller 122 comes into contact with the lower surface of the work W, and the lower cutter 123 is positioned in the vertical direction. Further, the roller 124 comes into contact with the end surface of the work W by the urging force of the spring 119, and the lower cutter 123 is positioned in the front-rear direction. In this state, as shown in FIG. 17, the lower cutter 123 chamfers the lower corner of the work W conveyed on the conveyance roller 42.

Covers 105 and 128 for covering the upper and lower cutters 100 and 123 are provided around the upper and lower cutters 100 and 123, respectively. Further, in the vicinity of the upper cutter 100, a nozzle (not shown) is arranged to blow off the cutting debris by air so that the cutting debris does not adhere to the upper surface of the work W. Work W
This is because if the cutting debris adheres to the upper surface of the work W, the cutting debris may be present between the work W and the pressing roller 69, which may hinder the conveyance of the work W.

As shown in FIGS. 1 to 3, a control box 53 having a start switch and the like is fixed to the upper portion of the pressing frame 61, and a lamp 54 is arranged on the front surface of the control box 53. There is. This lamp 54
Is the work W based on the count of the encoder 55.
Lights when the cutting length with respect to is equal to or more than a predetermined value, and informs the operator of the tip replacement timing of the upper and lower cutters 100 and 123.

Next, the operation of the chamfering machine constructed as above will be described. Before the chamfering process is started, the piston rod of the front-rear movement cylinder 85 is retracted as shown by the chain double-dashed line in FIG. 11, and the upper and lower processing units 81 and 110 are retracted from the transport unit frame 41 at the rear position. It is located in. Further, the upper processing frame 95 having the upper cutter 100 is arranged at the lower position by its own weight, and the lower processing frame 117 having the lower cutter 123 is arranged at the lower position by the action of the lifting cylinder 114.

When the working operation is started in this state, the piston rod of the forward / backward moving cylinder 85 is projected, the upper and lower working units 81 and 110 are arranged at the front position close to the transfer unit frame 41, and the lifting / lowering operation is performed. Cylinder 9
By the action of 1, the upper processing frame 95 is arranged at the upper position. Further, the conveyance roller 42 and the pressing roller 69 are rotated by driving the lower conveyance motor 43 and the upper conveyance motor 51, respectively.

Therefore, when the work W is conveyed along the guide plate 59 in accordance with the rotation of the conveyance roller 42 from the carry-in side shown on the left side of FIG. 1 in the direction of the arrow L, the front end of the work W is detected by the optical sensor 45. .

Based on this detection, the upper processing motor 9
The upper cutter 100 is rotated by 7 and the lower cutter 123 is rotated by the lower processing motor 120. Further, the driving by the lifting cylinder 91 is stopped, the upper processing frame 95 moves downward by their own weight, the upper cutter 100 is placed at the cutting position, and the lower processing frame 117 is moved by the driving of the lifting cylinder 114. The lower cutter 123 is arranged at the cutting position by being arranged at the upper position.

Further, the pressing cylinder 65 moves the roller frame 68 downward against the elastic force of the gas spring 67, and the pressing roller 69 presses the upper surface of the work W. At this time, since the pressing roller 69 is inclined along the line L1 shown in FIG. 4, the end surface of the work W is pressed against the guide roller set 44,
The conveyance is guided by the guide roller set 44. And
The upper and lower cutters 100 and 123 simultaneously round and chamfer the upper and lower corners of the edge of the work W.

At this time, the upper and lower cutters 100 and 123 are pressed against the work W by the springs 101 and 119, respectively, and their positions are regulated by the rollers 102 and 124. Further, the vertical position is regulated by the rollers 99 and 122 contacting the upper surface or the lower surface of the work W. Therefore, the required chamfering cutting amount by the cutters 100 and 123 is secured. At this time, even if the position of the end face corner is displaced in the thickness direction or the width direction of the work W due to the work W being curved or the like, the upper and lower cutters 100 and 123 follow the displacement, and the chamfering cutting is surely performed. To be done. Further, for example, as shown by a chain line in FIG. 17, even if the end surface of the work W is not a right angle with respect to the upper and lower surfaces of the work W but is inclined, the upper and lower cutters 100 and 123 are located above and below the work W, respectively. The chamfering cutting is performed reliably by being pressed firmly against the corner.

The work W, which has been cut, has the cutting mechanism 3
Get out of 3. Then, the light sensor 46 causes the work W
When the passage of the rear end is detected, the pressing mechanism 32 returns upward, the upper processing frame 95 having the upper processing cutter 100 moves upward, and the lower processing frame 117 having the lower cutter 123 respectively moves downward. . When the work W is continuously cut,
Even if the rear end of the work W passes through the portion of the optical sensor 46, the pressing roller 69 is not returned upward, the upper processing frame 95 is returned upward, and the lower processing frame 117 is not returned downward. It is also possible to set to.

Since the chamfering machine of this embodiment is constructed as described above, it has the following advantages. The work W is conveyed so as to pass a predetermined position by the guide action of the guide roller set 44 and the pressing roller 69 in the inclined arrangement, and the conveying action of the conveying roller 42 and the pressing roller 69, and is chamfered and cut. Therefore, unlike the case of manual work, the chamfering cutting can be automatically and easily and efficiently performed. The upper and lower corners of the work W are respectively the upper cutter 10.
Since the chamfering is performed by the 0 and the lower cutter 123 at the same time, the cutting can be efficiently performed. Since the pressing roller 69 can move up and down within the range of the gap 74 by the action of the cushion material 73, even if the work W is curved and unevenness is formed on the upper surface, all the pressing rollers 69 are on the upper surface of the work W. Can be reliably contacted with, and the work W can be fed at an accurate speed. Therefore, high processing accuracy can be maintained. Since the work W is reliably guided by the guide roller set 44 by the inclined arrangement of the pressing roller 69, the working portion of the work W is always arranged at the same position, and accurate working can be performed. The upper and lower cutters 100 and 123 are springs 101,
Since it is urged forward by 119, the upper and lower cutters 100 and 123 can follow the displacement of the corner of the work W and can cut the corner by a required amount. Therefore, the chamfering amount for the work W can be made constant at all times, and it is possible to contribute to accurate cutting similarly to the above. Since the permitting means only has the ring interposed between the pressing roller 69 and the shaft 72 thereof, the structure is simple and the assembling is easy. The upper and lower processing units 81 and 110 are held at the front positions by springs 101 and 119 and a front-rear movement cylinder 85 composed of an air cylinder, respectively. Then, when some force acts between the cutters 100 and 123 and the work W, the cutters 100 and 123 retract first against the action of the springs 101 and 119, and when a force larger than that acts, the air When the piston rod of the cylinder 85 is retracted, the cutters 100 and 123 can escape, so that the cutters 100 and 123 can be reliably prevented from being damaged. The upper and lower processing units 81 and 110 are largely separated from the transport frame 41 by the depression of the piston rod of the cylinder 85. Therefore, the cutters 100, 123 and their chips are replaced, or the upper and lower processing units 81,
When inspecting 110, etc., those units 81, 11
Since a large space is formed between 0 and the transport unit frame 41, these operations can be performed easily. The encoder 55 counts the cutting length,
When the cutting length exceeds a predetermined length, it is displayed by the lamp 54 on the control box 53, so that the cutter 1
The life of 00, 123 can be grasped and the cutter 100, 123
The chips can be replaced at an appropriate timing.

The present invention can be implemented as follows. (1) The cutters 100 and 123 are rotatably supported around a vertical axis so that the upper and lower corners of the work W can be simultaneously cut. In this case, the cutter 100,
123 may be supported on the same axis, and the upper and lower cutters 100 and 123 may be integrated. (2) Holding roller 6 for holding the upper surface of the work W
Replace 9 with a belt. Alternatively, the conveyance roller 42 may be a belt. (3) It is configured such that conveyance of the work W is performed either upward or downward.

The technical ideas understood from the above-mentioned embodiment are listed below. (1) The chamfering machine according to any one of claims 1 to 3, wherein the cutting means has a pair of upper and lower cutting portions so that the upper and lower corners of the work can be chamfered simultaneously.

With this structure, chamfering can be efficiently performed. (2) The guide means comprises a plurality of rollers for guiding the end surface of the work, and an upper conveyance mechanism inclined to the traveling direction of the work so as to press the work toward the rollers. The chamfering machine according to any one of 3 above.

According to this structure, the work can be reliably guided. (3) The chamfering machine according to claim 1 or 2, wherein the cutting means is biased toward the cutting position by the spring means and has a restricting portion that restricts the cutting position.

According to this structure, the work can be reliably and accurately chamfered and cut, and the tip of the cutter can be prevented from being damaged. (4) The chamfering machine according to any one of claims 1 to 3, wherein the cutting means can retract from the cutting position.

According to this structure, the tip of the cutter can be protected and the work such as tip replacement can be easily performed. (5) The chamfering machine according to any one of claims 1 to 3, wherein the permitting means is a roller and an elastic material provided between the shaft of the roller.

With this structure, the structure is simple. (6) The chamfering machine according to the item (5), wherein the elastic material is a rubber ring. With this configuration, the configuration becomes even simpler. (7) The chamfering machine according to any one of claims 1 to 3, further comprising: a unit for counting the cutting length and a unit for displaying the cutting length when the cutting length exceeds a predetermined value.

With this structure, the life of the cutter tip can be grasped.

[0051]

As described in the above embodiments, according to the first aspect of the present invention, the chamfering of the end corners of the work can be automatically and efficiently performed with high precision.

According to the second aspect of the invention, even if the work is curved and the upper surface thereof is not flat, the conveying means follows the unevenness of the upper surface by the action of the permitting means,
Workpieces are reliably fed.

According to the third aspect of the present invention, even if the position of the end face corner is displaced due to the bending of the work or the like, the cutting means follows it, and the chamfering cutting is surely performed.

[Brief description of drawings]

FIG. 1 is a front view of a chamfering machine.

FIG. 2 is a plan view of the same.

FIG. 3 is a side view of the same.

FIG. 4 is a partial plan view of a transport mechanism showing a cutting section.

FIG. 5 is a partial side view showing an optical sensor.

FIG. 6 is a partial side view showing a drive mechanism of a conveyance roller.

FIG. 7 is a front view showing a holding mechanism.

FIG. 8 is a side view of the same.

FIG. 9 is a cross-sectional view showing a drive configuration of a pressing roller.

FIG. 10 is a cross-sectional view of a pressing roller.

FIG. 11 is a sectional view showing an upper processing unit.

FIG. 12 is a front view showing a cutting mechanism.

FIG. 13 is a cross-sectional view showing a drive configuration of an upper cutter.

FIG. 14 is a plan view of the same.

FIG. 15 is a plan view showing a driving configuration of a lower cutter.

FIG. 16 is a cross-sectional view showing a support frame and a lower processing frame.

FIG. 17 is a partial side view of the work.

[Explanation of symbols]

31 ... a transport mechanism that constitutes the transport means, 32 ... a pressing mechanism that configures the transport means and the guide means, 33 ... a cutting mechanism, 4
2 ... conveying rollers constituting conveying means, 44 ... guide roller group constituting guiding means, 69 ... pressing rollers constituting conveying means and guiding means, 73 ... cushion material constituting permitting means, 74 ... permitting means Gap, 100 ...
Upper cutter constituting cutting means, 123 ... Lower cutter constituting cutting means.

Claims (3)

[Claims] 1. A conveying means for conveying a plate-shaped work from above and below in one direction, a guide means for guiding an end face of the work so as to pass a predetermined cutting position, and a corner of the end face of the work. A chamfering machine equipped with a cutting means for chamfering along with the conveyance of the work. 2. The chamfering machine according to claim 1, further comprising a permitting means for permitting the movement of the conveying means so that the contact portion with the work upper surface can move in accordance with the shape of the work upper surface. 3. The chamfering machine according to claim 1, wherein the cutting means is configured to follow the displacement of the corner position of the work end surface.