JPH0524151U - Casting trimming equipment - Google Patents

Abstract

(57) [Summary] [Purpose] The removal of cast burrs and the detection of abnormalities in the cast part of a cast product are performed simultaneously with the operation of the mold to improve work efficiency. [Structure] Between the lower mold 1 and the upper mold 2, a cast product 50 having cast-out portions 51 to 53 on the outer surface thereof and having a casting burr 59 remaining is arranged. In a trimming device for a cast product in which the casting burr 59 is sheared off by the trimming blades 8 and 30 provided on the respective molds 1 and 2 by the approaching movement of at least one of the lower mold 1 and the upper mold 2, The molds 1 and 2 on the side of the cast product 50 facing the openings of the cast parts 51 to 53 are always urged in a direction projecting to the cast product 50 side, and the molds 1 and 2 move. Along with this, the pin members 14 to 16 that can enter the cast-out portions 51 to 53 and the displacement detecting members 31 to 33 that detect the axial displacement of the pin members 14 to 16 are formed. According to the displacement amount of 16, the casting parts 51 to 53
Those equipped with abnormality detection means for detecting abnormalities.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a trimming device for a cast product for removing cast flash of the cast product.

[0002]

[Prior Art]

 Conventionally, various types of trimming devices have been proposed for removing casting burrs from cast products, and the general structure thereof is fixed as disclosed in, for example, JP-A-63-140758. The lower die, which is placed and fixed on the casting table on which the casting is placed, is arranged so that it can move in and out of contact with the lower die. A pair of upper and lower trimming blades provided on the mold respectively shears and removes the casting burr of the casting.

[0003]

[Problems to be solved by the device]

 By the way, in cast products, bolt holes, etc. may be cast and formed on the outer peripheral surface.In this case, especially in the die-cast casting method, this cast portion is formed by using a pin-shaped metal core. Since the core is formed, the core may be broken in the middle of the mold release and left in the cast part.

As described above, when the core is left unbroken in the casting portion, it is separately removed again, or the cast product having the unfolded core itself is discarded. Therefore, when removing cast burrs from the cast product (trimming work) to obtain the final product, it is necessary to confirm whether or not there are defects such as unfolded cores in the cast part of the cast product. ..

In such a case, conventionally, the defect check work of the casting portion is manually performed by the operator and separately in a process different from the trimming work, so that the number of work steps is increased. Also, in some cases, there is a waste of work such as performing bending corner trimming due to a defect check error, but then finding that there is an unfolded core and finally having to discard this cast product itself. There was such a problem.

In view of this, the invention of the present application aims to significantly improve the work efficiency by simultaneously performing the work of detecting a defect in the cast portion of a cast product during the trimming work, and at the same time, to set the work order. Was proposed as a proposal for a trimming device for cast products that eliminates waste of work.

[0007]

[Means for Solving the Problems]

 As a concrete means for solving such a problem in the present invention, in the invention according to claim 1, the lower mold and the upper mold are contacted and separated from each other between the lower mold and the upper mold which are capable of being contacted and separated from each other. A cast product having cast-out portions on the outer surfaces facing each other and having casting burrs extending in a direction substantially orthogonal to the contacting / separating direction is arranged, and the lower mold and the upper mold are brought close to each other. In the trimming device for a cast product in which the casting burrs of the cast product are sandwiched by the trimming blades provided on the lower mold and the upper mold from both upper and lower sides to remove the burrs, Among them, at least a mold located on the side of the casting facing the opening of the casting part is always urged in a direction projecting toward the casting, and the casting part moves with the movement of the mold. And the axial direction of the pin member Characterized by comprising an abnormality detecting means for detecting an abnormality of the displacement detecting member and the I by the displacement of the said pin members consist cast recessed portions for detecting the position.

According to a second aspect of the present invention, in the trimming device for a cast product according to the first aspect, a removal operation of a casting burr by each of the trimming blades caused by an approach movement of the lower die and the upper die, and the abnormality detection. Among the abnormality detecting operation of the casting portion by the means, the abnormality detecting operation is preceded, and when the abnormality detecting means detects the abnormality of the casting portion, the removing operation of the casting burr is stopped. It is characterized by

According to a third aspect of the present invention, in the casting product trimming apparatus according to the first or second aspect, the lower mold is a fixed mold, the upper mold is a movable mold, and the abnormal condition is present in the lower mold. While arranging the detection means, the lower die supports a casting product mounting table so that the casting product mounting table can be moved toward and away from the lower mold, and the casting product mounting table is moved toward the upper mold side of the lower mold. It is characterized in that it can be downwardly displaced integrally with the above cast product.

[0010]

[Action]

 With each of the inventions of the present application, the following actions can be obtained by adopting such a configuration.

According to the first aspect of the invention, a casting is arranged between the lower mold and the upper mold, and the respective molds are moved toward each other so that the trimming blades respectively provided in the respective molds are moved. As a result, the cast burr that remains on the outer surface of the cast product and remains is sheared off. Further, in this case, the abnormality detection means is activated at the same time to detect an abnormality in the cast-out portion of the cast product. That is, when there is no unfolded core in the cast-out portion of the cast product, the pin member of the abnormality detecting means enters into the cast-out portion due to the approaching movement of the two molds. Does not detect the displacement of the pin member, and therefore the abnormality detecting means detects that the cast-out portion is normal (that is, there is no unfolded core inside the cast-out portion).

On the other hand, when the unfolded core is present in the casting part, when the pin member tries to enter the casting part due to the approaching movement of the two molds, the pin member Since the tip end of the pin collides with the folded core, its entry movement is blocked, and the pin member is displaced relative to the mold in which it is provided. When the displacement detecting member detects the displacement of the pin member, the abnormality detecting means detects the abnormality of the cast-out portion.

According to the second aspect of the present invention, in addition to the above-described action, first of all, the abnormality detection of the casting portion is first performed prior to the removal (that is, trimming) of the casting burr with the approaching movement of each die. If an abnormality in the casting is detected at this point, the subsequent trimming work is stopped without being executed, and only when it is normal, the trimming work is performed following the abnormality detection. It is what is done.

According to the third aspect of the present invention, in addition to the above or the above-described action, the casting product is fixedly mounted on the casting product mounting table arranged so as to be capable of downward movement displacement on the lower mold side which is the fixed mold. Then, by lowering the movable upper mold in this state, the cast product also moves downward integrally with the cast product mounting table, and the lower surface of the cast product is detected by the abnormality detection means arranged on the lower mold side. Abnormality detection is performed on the side of the casting, that is, in the direction opposite to the moving direction of the upper die.

[0015]

[Effect of the device]

 Therefore, according to the casting trimming device of each invention of the present application, the following effects are obtained.

(A) According to the casting product trimming apparatus of the first aspect, the abnormality detection work and the casting burr removal work in the casting part of the casting product are performed by one contact and separation movement of the lower die and the upper die. Since the work is performed simultaneously, the work can be greatly simplified and the work efficiency can be improved as compared with the case where the two works are performed separately in different processes.

Further, in this case, since the abnormality detection work of the casting portion is mechanically performed along with the movement of the mold, for example, as compared with the case where the worker manually performs this by means such as visual confirmation. Then, the abnormality detection becomes more reliable, and the improvement of the detection accuracy improves the work reliability.

(B) According to the casting product trimming apparatus of claim 2, in addition to the effect of (a) above, the abnormality detection work of the casting portion is executed prior to the trimming work, and the casting operation is performed. Since the trimming work is stopped when an abnormality is detected in the extracted part, unnecessary trimming work is not performed for cast products that cannot be used as products due to the presence of the folding core. Waste is prevented in advance, and the effect is particularly remarkable when casting products with folded cores are discarded.

(C) According to the trimming device for a cast product as set forth in claim 3, in addition to the effect as set forth in (a) or (b), a direction opposite to the moving direction of the lower die moving downward. It is possible to detect abnormalities even with respect to the casting part formed toward the side, which is comparatively easier than the abnormality detection of the casting part provided on the movable upper die side. It can be easily applied to a fixed mold that has a cast-out part that is difficult to detect, and its versatility is extremely high.

[0020]

【Example】

 Hereinafter, a trimming device for a cast product according to the present invention will be specifically described with reference to an embodiment shown in the accompanying drawings.

FIG. 1 shows a trimming device Z for cast products according to an embodiment of each invention of the present application. This trimming device Z is arranged in a fixed manner with a lower die 1, and is arranged above the lower die 1 so as to face the lower die 1, and in the direction in which the lower die 1 is brought into contact with and separated from the lower die 1 by a press ram 12 (arrow U- The upper die 2 movable in the D direction) is provided to remove a casting burr 59 of the casting 50 described later and to detect abnormalities in the cast-out portion of the casting 50. .. Here, first, the cast product 50 to which the trimming device Z is applied will be described, and then the configuration of the trimming device Z itself will be described.

A: Structure of cast product 50 The cast product 50 is formed by die-cast casting into a substantially box shape with an open lower surface 50b, and a bolt pilot hole is formed on the upper surface 50a. An upper surface side cast-out portion 51 and a lower surface side cast-out portion 52, 53 similar to the lower surface 50b are respectively formed by using a metal core. A casting burr 59 is left on the lower surface 50b (that is, a portion corresponding to the mating surface of the mold) in a state of laterally extending from the lower surface 50b. The trimming device, which will be described later, not only removes the cast burr 59 by shearing, but also detects whether or not a part of the core remains in each of the cast parts 51 to 53 when the cast product is released from the mold. (Note that the cast product 50 in FIGS. 3 and 4 shows that the unfolded cores 55 to 57 are present in the cast-out portions 51 to 53, respectively).

B: Configuration of Trimming Device Z The trimming device Z includes the lower mold 1 that is a fixed mold and the upper mold 2 that is a movable mold as described above. Of these, the upper surface of the lower mold 1 is A base 4 is fixed on the base 1a, and a guide member 5 which is fitted into the casting 50 for horizontal positioning and fixing is fixed on the upper surface of the base 4 in a laminated state. ing. Further, on the outer peripheral side of the guide member 5, a casting product mounting table 3 to be described later is fitted and arranged so as to be vertically movable along the side surface 5a.

The casting product mounting table 3 has an upper surface 3a as a mounting surface for the casting product 50, a lower surface 3b as a stopper surface for abutting against the upper surface 4a of the base 4, and an upper end outer periphery thereof. The part is the trimming blade 30. The casting table 3 is elastically supported by a plurality of table supporting springs 17, 17, ... At a position above the base 4 by a predetermined dimension. In addition, this casting product mounting table 3 has the casting products 50 placed on the upper surface 3a thereof, and the casting products 50 are placed at positions corresponding to the lower surface side cast-out portions 52 and 53 of the casting products 50. Guide holes 41, 41 for inserting the mounting table 3 in the vertical direction are formed.

Further, in each of the guide holes 41, 41, the base 4 side is slidably arranged upward and elastically supported by a pin biasing spring 18 arranged at the lower end side thereof. The first movable pins 14 and 14 (corresponding to the pin members in the scope of claims for utility model registration) of predetermined lengths are respectively inserted. When the casting table 3 and the lower movable pin 14 are both in a free state (the state shown in FIG. 1), the tip end of the lower movable pin 14 is the upper surface 3a of the casting table 3. The dimensions between them are set so as to be retracted slightly downward.

The lower movable pin 14 is engaged with a lower limit switch 31 (corresponding to a displacement detecting member in the scope of utility model registration claims) fixed to the base 4 side. A protrusion 35 is formed so that when the lower movable pin 14 is displaced downward from its free state, the lower limit switch 31 detects it. Further, in this embodiment, the lower movable pin 14 and the lower limit switch 31 constitute the abnormality detecting means within the scope of the utility model registration claim (note that the upper die 2 side is also provided. As will be described later, an abnormality detection means having the same structure as this is provided).

The upper mold 2 has a guide member 7 having a U-shaped cross section fixed to a lower surface 2a of the upper mold 2 via a base 6 with its opening side facing downward. The size of the internal opening of the guide member 7 is such that the casting 50 can be inserted therein, and a trimming blade 8 is provided at the lower end thereof. As shown in FIG. 2, the trimming blade 8 is fitted on the outer side of the trimming blade 30 of the casting product mounting table 3 as the upper die 2 moves downward, and cooperates with the trimming blade 30 to form a casting burr 59. Can be sheared off.

Further, inside the guide member 7, a pressing member 9 composed of a plate body of a predetermined size is arranged so as to be able to move up and down while being suspended and supported by a plurality of guide rods 22, 22. At the same time, the pressing member supporting spring 21 constantly urges it to project downward. As shown in FIG. 1, the head 22a of the guide rod 22 abuts the shoulder 7a of the guide member 7 so that the maximum downward position of the pressing member 9 is regulated, and as shown in FIG. When the head portion 22a comes into contact with the base 6, the maximum moving position thereof is restricted. The spring force of the pressing member supporting spring 21 is set to a value larger than that of the mounting table supporting spring 17 supporting the casting mounting table 3 described above.

A guide hole 42 is formed through the pressing member 9 at a position corresponding to the upper surface side cast-out portion 51 of the cast product 50 in the vertical direction, and the guide hole 42 is formed in the guide hole 42. An upper movable pin 16 is inserted into the upper movable pin 16 which is always urged downward by a pin urging spring 20. The upper movable pin 16 has its head 16a contacting the guide member 7 so that its maximum downward movement position is regulated, and when the pressing member 9 is in the free state. As shown in FIG. 1, the tip of the upper movable pin 16 is retracted slightly above the lower surface 9a of the pressing member 9.

Further, an engaging protrusion 37 is formed on the upper movable pin 16, and an upper limit switch 33 that engages with the engaging protrusion 37 is arranged on the guide member 7 side. When the upper movable pin 16 is displaced upward relative to the guide member 7 from the free state (the state shown in FIG. 1), this is detected by the upper limit switch 33. The upper movable pin 16 corresponds to the pin member in the scope of claims for utility model, and the upper limit switch 33 corresponds to the displacement detection member. Both of them detect abnormality in the scope of claims for utility model registration. Means are configured. The lower limit switch 31 or the upper limit switch 33 of both the upper die 2 side abnormality detecting means and the lower die 1 side abnormality detecting means are displaced by the lower movable pin 14 or the upper movable pin 16. When it detects "," it detects an abnormality in the casting part and outputs it to the control unit (not shown).

At the maximum approaching position between the lower mold 1 and the upper mold 2, the lower stopper 10 provided on the lower mold 1 and the upper stopper 11 provided on the upper mold 2 are arranged in a vertical direction with respect to each other. It is regulated by abutting and engaging (see FIG. 2).

C: Operation of Trimming Device Z Subsequently, the operation and the effect thereof when the trimming device Z is used to actually perform the trimming work and the cast hole abnormality detection work on the cast product 50 I will explain in detail.

In working, first, the upper die 2 is moved upward as shown in FIG. 1, and the upper die 2 is largely separated from the lower die 1. In this state, the cast product 50 is placed on the cast product mounting table 3 on the lower die 1 side, and the guide member 5 positions and fixes the cast product 50 in the left-right direction. After that, the upper die 2 is continuously moved down by the press ram 12 to a lowermost moving position (that is, a position where the lower stopper 10 and the upper stopper 11 are engaged) at a predetermined speed.

With the downward movement of the upper die 2, first, as shown by the chain line in FIG. 1, the pressing member 9 comes into contact with the upper surface 50a of the casting 50 (see reference numeral 9 '), and from this point onward. The pressing force of the press ram 12 starts to be applied to the cast product 50. At this point, the trimming blade 8 is located above the casting burr 59 of the casting 50 placed on the casting table 3 in the free state (see reference numeral 8 '). ).

The upper die 2 continues to move downward at a predetermined speed even after the pressing member 9 contacts the upper surface 50a of the casting 50 in this way. In this case, the pressing member supporting spring 21 Since the spring force is larger than that of the mounting table support spring 17, the pressing member 9 maintains the relative relationship with the guide member 7 as the upper die 2 further moves downward (in other words, the upper movable member). While maintaining the relative relationship with the pin 16), the casting product 50 is pushed down together with the casting product mounting table 3 against the spring force of the mounting table support spring 17, and the downward motion is continued.

Here, when there is no unfolded core in each of the lower surface side cast-out parts 52 and 53 of the cast product 50, as shown in FIG. As the lower movable pins 14 and 14 directly enter the lower surface castings 52 and 53 of the casting 50 as they are pushed down, the lower movable pins 14 do not move in the vertical direction. Therefore, the lower limit switches 31 and 31 do not operate (that is, the lower surface side cast-out parts 52 and 53 are in the normal state).

Further, when the casting table 3 moves downward and contacts the base 4, and the downward movement is restricted, as shown in FIG. The guide member 7 acts on the pressing member supporting springs 21 and 21, and the guide member 7 further moves downward while contracting the pressing member supporting springs 21 and 21 while keeping the pressing member 9 in contact with the upper surface 50a of the casting 50. To do. In this case, the upper movable pin 16 projects downward from the pressing member 9 as the pressing member 9 and the guide member 7 are displaced relative to each other. When there is no folded core inside, the upper movable pin 16 simply enters the upper surface casting 51 without any vertical displacement, and thus the upper limit switch 33 Does not work (that is, the upper surface casting 51 is normal).

On the other hand, when there are unfolded cores 55-57 as shown in FIG. 3 in the upper surface side cast-out portion 51 or the lower surface side cast-out portions 52, 53 of each of the above cast products 50, respectively. Since the tips of the lower movable pins 14 and 14 and the upper movable pin 16 come into contact with the respective folding cores 55 to 57 to prevent entry into the cast-out portions 51 to 53, The lower movable pins 14 and 14 and the upper movable pin 16 are respectively displaced in the backward direction. The axial displacements of the lower movable pins 14, 14 and the upper movable pin 16 are detected by the corresponding limit switches 31, 31, 32, respectively. Upon receiving the signals from the limit switches 31, 31, 32, the control unit (not shown) detects defective castings of the casting 50. Therefore, afterwards, the cast core 50 can be used as a product by removing the unfolded cores 55 to 57 from the cast-out portions 51 to 53 of the cast core 50, respectively.

On the other hand, in parallel with such abnormality detection of the casting parts 51 to 53, the trimming blade 8 and the trimming blade 30 on the casting product mounting table 3 side are moved by the downward movement of the guide member 7. By the cooperation work, the casting burr 59 of the casting 50 is sheared and removed. When the work of removing the casting burr 59 is completed, the lower stopper 10 on the lower die 1 side and the upper stopper 11 on the upper die 2 side are engaged with each other, and the lower movement of the upper die 2 is stopped. R. After that, the operation of the press ram 12 is reversed, and the upper die 2 is moved up to the initial position. In this state, the cast product 50 as a product from which the casting burrs have been removed is taken out from the trimming device Z and prepared for the next trimming work.

As described above, in this embodiment, the trimming work is performed in parallel with the abnormality detection work regardless of whether the cast-out parts 51 to 53 of the casting 50 are in the abnormal state or in the normal state. Therefore, it is said that it is suitable when it can be used as a product by subsequently removing the unfolded cores 55-57 remaining in the cast-out parts 51-53 of the cast product 50. I can say.

On the other hand, once the unfolded core is generated in the casting part, the cast product 50 is no longer used as a product but is discarded as it is. When it is confirmed that the remaining cores 55 to 57 are present, it is useless to perform further trimming work on them. Therefore, in such a case, as shown in FIG. 4, the forming positions of the engaging protrusions 35, 35, 37 provided on the movable pins 14, 14, 16 are adjusted to adjust the trimming blades 8 Before the trimming work by 30 and 30, the abnormality of the casting part can be detected, and when the abnormality of the casting part is detected, the lower movement of the upper die 2 is stopped immediately at that point. It may be possible to raise and return to the initial position.

As described above, in the trimming device Z, it is possible to simultaneously detect an abnormality in each of the casting parts 51 to 53 of the cast product 50 and remove the casting burr 59 in one step of the upper die 2. Compared to the case where these two works are performed separately in different processes, the man-hours of the work are significantly reduced, and higher workability can be achieved.

Further, when adopting the structure for detecting the abnormality of the cast-out part in accordance with the downward movement of the movable upper die 2 as described above, the upper die 2 should be opposed to the front in the moving direction. Although it is relatively easy to detect an abnormality in the cast-out portion (that is, the upper surface-side cast-out portion 51 in this embodiment) that opens, the cast-out portion that opens forward in the moving direction of the upper mold 2. It is difficult to detect abnormalities in the parts (that is, the lower surface casting parts 52 and 53 in this embodiment). However, in this embodiment, as described above, the casting product mounting table 3 floated and supported on the lower die 1 side, and the lower movable pin 14 disposed so as to be relatively displaceable with respect to the casting product mounting table 3. The trimming device Z is extremely versatile in that it can be applied easily and surely, and that it can be applied regardless of the formation position of the casting. Can be said.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a trimming device according to an embodiment of the present invention.

FIG. 2 is a state change diagram of FIG.

FIG. 3 is a state change diagram of FIG.

FIG. 4 is a vertical sectional view of a trimming device for a cast product according to another embodiment of the present invention.

[Explanation of symbols]

1 is a lower mold, 2 is an upper mold, 3 is a casting product mounting table, 4 is a base, 5
Is a guide member, 6 is a base, 7 is a guide member, 8 is a trimming blade, 9 is a pressing member, 10 is a lower stopper, 11 is an upper stopper, 12 is a press ram, 14 is a lower movable pin, and 16 is an upper movable. Pins, 17 are mounting table support springs, 18 and 20 are pin biasing springs, 21 are pressing member support springs, 22 is a guide rod, 30 is a trimming blade, 31 is a lower limit switch, 33 is an upper limit switch, 35 and 37 is an engaging protrusion, 41 and 42
Is a guide hole, 50 is a cast product, 51 is an upper surface casting part, 52
And 53 are lower surface side cast-out parts, 55 to 57 are unfolded cores, 59
Is a casting burr.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Tamotsu Okada 3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Mazda Motor Corporation

Claims (3)

[Scope of utility model registration request] 1. A cast-out portion is provided between the lower die and the upper die which are capable of coming into contact with and away from each other, and the outer surface of the lower die and the upper die are opposed to each other in the approaching and spacing direction. Arrangement of the cast product in which casting burrs extending in a direction substantially orthogonal to each other are arranged, and the lower die and the upper die are brought closer to each other by the trimming blades provided in the lower die and the upper die, respectively. A trimming device for a cast product, wherein a casting burr is sandwiched from both upper and lower sides to remove it by shearing, and of the lower mold and upper mold,
At least the mold on the side of the cast product facing the opening of the cast product is always biased in a direction projecting toward the cast product and can enter the cast product as the mold moves. And a displacement detecting member for detecting an axial displacement of the pin member, and an abnormality detecting means for detecting an abnormality of the casting portion based on a displacement amount of the pin member. Trimming equipment for castings. 2. The method according to claim 1, wherein the trimming blade removes cast burrs as the lower die and the upper die move closer to each other, and the abnormality detecting means detects abnormalities in a casting part. A trimming device for a cast product, characterized in that an abnormality detecting operation is preceded, and when the abnormality detecting means detects an abnormality in a casting portion, the operation for removing the casting burr is stopped. 3. The method according to claim 1, wherein the lower mold is a fixed mold, the upper mold is a movable mold, and the abnormality detecting means is arranged on the lower mold, while the lower mold is mounted with a casting product. A mounting table is supported so as to be able to move toward and away from the lower mold, and the casting product mounting table is configured so that it can be downwardly displaced integrally with the casting product as the lower product moves closer to the upper mold side. A trimming device for cast products characterized by the above.