JPH0839337A - Automatic trimming method and device - Google Patents

Abstract

PURPOSE:To keep a satisfactory sharpness for a long period by pressing and sliding the end surface of the edge part of each cutting blade in contact with the end surface of each spray die to perform the cooling, cleaning and washing actions of the edge. CONSTITUTION:In the trimming stroke of a product, the end surface of each spray die 15, 19 is pressed and slid in contact with the end surface of each blade 10, 5 and operated. In this time band, a lubricating oil is sprayed to the end surface of each cutting blade 10, 5 through each spray hole 15-1, 19-1 bored in each spray die 15, 19. Thus, the edge parts of the cutting blades 10, 5 are cooled, cleaned and washed, the satisfactory state of sharpness of each cutting blade 10, 5 can be held for any length of time, and the cutting section of the product is smoothed with squareness.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a die cast product (hereinafter referred to simply as "product"), which is suitable for burrs and biscuits.
The present invention relates to a method and an apparatus for automatically performing a trimming operation for cutting and removing unnecessary parts such as a runner from a product.

[0002]

2. Description of the Related Art Trimming work for cutting and removing unnecessary parts such as burrs, biscuits, and runners in a product is performed by double-sided simultaneous trimming in Japanese Patent Application Nos. 5-78676 and 5-195076. However, the material of the cutting part
It is possible only by setting the optimum trimming conditions from the shape, temperature, etc., and further only with a cutting blade made in consideration of the above setting conditions, if the material, shape, temperature etc. of the cut part of the product are different, At present, trimming work is performed using a cutting blade that satisfies those conditions. In such a method, it is necessary to prepare various kinds of blades that match the conditions such as the material, shape and temperature of the product, and it takes labor, time and cost to replace the blades. It goes without saying that the die casting machine must be stopped during that time. In this way, it is necessary to always have some kind of cutting blade suitable for the type of product,
Further, since the product is relatively soft, a cutting edge is formed at the cutting edge of the cutting blade due to repeated trimming operations, and it takes a considerable amount of time and labor to remove it.
As described above, the die-casting machine has to be out of service in order to change the cutting blade every time the product is changed or to change the cutting blade frequently due to deterioration of sharpness due to the cutting edge of the cutting blade. Therefore, the flow of the production line does not flow at a constant speed, and the efficiency is inevitably lowered.

[0003]

As described above, unnecessary parts such as burrs, biscuits, and runners of a product are simultaneously trimmed by shearing from both upper and lower sides without being affected by the material or shape, and shearing is also performed. If you supply a trimming method and equipment that can make the cut surface with a force smooth and have an excellent perpendicularity, and can obtain a cut surface without "cut" in the product, the defect rate due to "cut" in the product Therefore, the yield of products is significantly improved.

[0006] As described above, when the trimming work by the shear method is repeated to cut and separate the unnecessary portion of the product, a cutting edge is formed at the cutting edge portion of the cutting blade, the sharpness is deteriorated, and eventually the cutting is performed. The surface is "notched" on the product side
This causes a phenomenon, resulting in an extremely high defective rate of the product.

Generally, the shape of the cutting edge due to shearing force is affected by various factors such as the material and temperature of the product, the shape and finishing degree of the cutting tool, and the quenching hardness, so that the shearing cutting edge is sagging.
Burr occurs, and a shear surface and a fracture surface also occur. in this case,
Most of the cut surface has a sheared surface in the ductile material and has a large amount of sag and burrs. However, the brittle material has a small sag and sheared surface area, and most of the cut surface has a shear fracture surface, which is also an irregular shape.

As described above, since the product is relatively soft, it can be easily cut and sheared, but on the other hand, the cutting edge and the shearing property of the cutting tool are remarkable because the constituent cutting edges are formed at the cutting edge of the cutting blade. There is a problem with getting worse.

Further, the heat generated by cutting and shearing raises the product temperature of the work piece, raises the temperature of sheared scraps, and also raises the temperature of the cutting blade. As a result, the rise in temperature of the cutting blade causes more and more cutting edges to be formed at the cutting edge of the cutting blade, so that the product cutting surface trimmed and cut by the cutting blade causes “chips”.

The mechanical properties of the product at high temperature, especially the tensile strength and the shear strength, have the property that the higher the product temperature, the smaller the value thereof and the more brittle it becomes. This means that the larger the cross-sectional shape of the cut portion is, the more advantageous the trimming under high temperature is, that is, the trimming can be performed with a small force. However, in extremely thin hollow trimming, the material for the trimming work at high temperature is soft and brittle as described above, so the surface pressure of the cutting blade for trimming causes the cut before the cut is made. The hollow cross section is deformed, and as a result, the hollow cross section is crushed by the surface pressure, or a large "notch" is formed at the cut end of the cut surface.

The present invention has been made in view of the above-mentioned prior art, and the trimming operation of the product is performed within the casting cycle of the die casting machine without being affected by the material of the product, the shape and temperature of the cut portion, and the like. In order to achieve a trimming cycle that fits in, and also to prevent the creation of cutting edges, the life of the cutting blade is dramatically extended, and the labor of replacing the cutting blade is significantly reduced. It is an object of the present invention to provide an automatic trimming method and device that enables high efficiency.

[0010]

In order to achieve the above object, the automatic trimming method and apparatus of the present invention is provided for trimming and removing unnecessary parts such as burrs, biscuits, and runners of a product from the product. Although the proper trimming temperature is determined by the material and shape of the product, the cast product as it is taken out from the die of the die casting machine immediately after casting is
The temperature is about 300 to 350 ° C. Therefore, when trimming the die cast product, if there is a difference from the proper trimming temperature, air or the like (air or water, or a mixture of air and water is used at the connection port of the spray heads 6 and 9 shown in FIG. , And the mixing ratio thereof is also arbitrarily adjusted, and these are collectively expressed as air etc.), the spray nozzles 7 and 8 installed at the tips of the spray heads 6 and 9 are supplied. More air or the like is sprayed on the cut part of the product 17, and as a result,
The cut portion will be cooled. If the injection time is set in advance in a computer provided in the controller 21 based on the correlation value between the surface temperature of the cut portion of the product and the appropriate trimming temperature of the cut portion, the surface temperature of the product is However, the spraying is continuously performed until the temperature reaches the optimum temperature for the trimming work, and when the temperature reaches the proper trimming temperature, the spraying of air or the like is automatically stopped.

Since the product is relatively soft, cutting can be performed easily, but it is easy to form a component cutting edge at the cutting edge of the cutting blade. Therefore, if the product and the unnecessary portion are cut and trimmed with the component cutting edge, the cutting tool is cut. Shearability deteriorates, and the cut surface of the cut surface has a large shear fracture surface, which also has an irregular shape. In many cases, this shear fracture surface "cuts" into the cut surface of the product, and the damage rate of the product is high. To prevent this, the cutting edge of the cutting blade is constantly cooled to a temperature at which it is difficult for the constituent cutting edge to form, and FIG.
As shown in (c), the end face of the spray mold 19 and the end face of the blade 5 are pressed and slid to clean and remove foreign matter adhering to both sides, so the blade tip is always a smooth surface, Further, since the cutting edge of the cutting blade is cooled by the spray injection and does not receive heat from cutting scraps, there is no need to worry about the adhesion of the cutting blade to the cutting edge.

Lubricating oil is sprayed onto the end surface of the cutting blade 5 through a spray hole 19-1 formed in the spray mold 19 to spread the lubricating oil evenly on the end surface of the cutting blade 5. Therefore, even in the trimming work in the next step, the cutting edge of the cutting blade 5 can maintain good sharpness forever.

In the automatic trimming apparatus of the present invention, as shown in FIG. 1, the product 17 taken out from the gui-casting machine is set on the upper surface of the spraying direction 15 located above the mold 13, and then the mold 3 is set. Spray nozzle 7 provided on the lower surface of the mold and the spray nozzle 8 provided on the upper surface of the mold 13.
To automatically inject air or the like toward the cut portion of the product 17 simultaneously or alternately from the upper and lower spray nozzles 7 and 8 for a certain period of time and automatically control the piping device according to a program. Control device 21
It has

Further, the automatic trimming device of the present invention is provided with a spray mold 19 as set forth in claim 1, and the end face of the spray mold 19 and the end face of the blade 5 are pressed and slid to each other, whereby the end face of the blade 5 is pressed. Further, the spreading of the lubricating oil and the cleaning of cutting scraps and the like attached to the end surface of the blade 5 can be completely carried out.

When the end surface of the spray die 19 and the end surface of the blade 5 are brought into pressure contact with each other, the lubricating oil can be spread on the end surface of the cutting blade 5, and at the same time, the cutting scraps attached to the end surface of the cutting blade 5 can be spread. The same effects as the pressure contact sliding effect of the spray die 19 and the blade 5 can be expected on both end surfaces of the spray die 15 and the blade 10.

As shown in FIG. 1, the pressure contact sliding operation of the end surface of the spray die 19 and the end surface of the blade 5, and the end surface of the spray die 15 and the end surface of the blade 10 is performed only by the descending and ascending operation of the pressurizing cylinder 1. Be done. That is, after the product 17 is set on the spray mold 15, air is sprayed from the spray nozzles 7 and 8 simultaneously or alternately toward the cut portion of the product 17 according to the operation set in the computer in the control device 21. And so on. (Some programs do not have a cooling cycle depending on the material and shape of the product 17). As a result, the cut portion of the cooled product 17 has an optimum temperature for trimming. After that, the pressurizing cylinder 1 is lowered by the activation of the computer of the control device 21, and the movable platen 2 is also lowered by the open height S ₃ shown in FIG. 4B. This lowered state diagram is shown in FIG. Further, the lowering operation of the movable platen 2 continues, the lowering operation of the pressurizing cylinder 1 is completed, and the movable platen 2 is stopped, as shown in FIG. In the process from FIG. 4 (c) to FIG. 4 (d), both end faces of the spray molds 19 and 15 are provided so as to slide in pressure contact with both end faces of the blades 5 and 10. Because
By injecting the lubricating oil into the blades 5 and 10 through the spray holes 19-1 and 15-1, the lubricating oil can be spread uniformly on the end surfaces of the blades 5 and 10.

FIG. 4D shows the guides 1 provided on the molds 3 and 13, respectively, while the movable platen 2 continues to descend.
8 and 16 are fitted, stopped at the large diameter of the guide 18, and the movable platen 2 is also pressurized by the pressure holding of the pressure cylinder 1.

FIG. 4 (e) shows the cutting cylinder 4 in the mold 3 and the blade 5 and the mold 13 connected in a skewer shape with the cutting cylinder 4 from the pressure-holding state of FIG. 4 (d). The cutting cylinder 11 and the blade 10 connected to the cutting cylinder 11 in a skewer-like shape are in a state of making a cut in the forward direction toward the cut portion of the product 17 at substantially the same time.

After trimming and cutting the unnecessary portion of the product 17 by the above-mentioned trimming operation, trimming is performed from FIG. 4 (e) to FIG. 4 (d), and further from FIG. 4 (d) to FIG. The operation sequence is reversed from that of the operation sequence. However, when the unnecessary portion is cut in the course of this operation, the cutting scraps and the like adhered to the end faces of the spray dies 15 and 19 and the end faces of the blades 10 and 5 by pressure contact. It is worn away by moving, and during the operation,
Each spray hole 1 provided in each spray mold 15 and 19
A program is installed in a computer in the control device 21 so that air or the like is jetted from 5-1 and 19-1, and the cutting edge of each cutting blade 10 and 5 is cleaned, washed and cooled by the activation of this control device 21. Even after the pressurizing cylinder 1 is lifted to the first upper limit position and stopped, the blade edge is cooled with appropriate air or the like as necessary.

[0020]

By the trimming method and apparatus of the present invention,
For automatic trimming of the product, spray nozzles 7 and 8 are provided, as described in claims 3 and 4, in which the device is connected to spray heads 6 and 9 as shown in FIG.
From the above, depending on the material and shape of the product to be trimmed, it is cooled to an appropriate trimming temperature with air or the like. To achieve this appropriate trimming temperature, the cooling cycle by the injection of air or the like is controlled by the computer in the control device 21. By incorporating this into a program and activating the control device 21, an appropriate trimming temperature can be easily set.

Further, the automatic trimming method and apparatus of the present invention, as set forth in claims 1 and 2, each spray mold 19
4 and 15 are provided so as to hold the upper and lower surfaces of the product 17 as shown in FIG. 4 (c). Further, while the die 3 is waiting at the ascending limit, the blade tip portions of the blades 5 and 10 are cooled by air or the like by setting to the position shown in FIG. As described in b)), the fatigue strength is prevented from being lowered due to the heat of the cutting edge portion, and the constituent cutting edge that occurs during trimming cutting is also prevented.

In the trimming process of the product, that is, in the range where the pressurizing cylinder 1 is actuated by the control device 21 and is moved downward from FIG. 4C to FIG. The end faces and the end faces of the blades 10 and 5 are pressed and slid to operate, and during this time, the spray dies 15 and 19 are pierced by the spray holes 15-1 and 19-1. It can be carried out by incorporating a program into a computer in the control device 21 so as to inject the lubricating oil toward the end faces of 10 and 5 and activating the program.
Since the sharpness of Nos. 5 and 5 can be maintained forever, the cut cross section of the product 17 is smooth and the perpendicularity can be obtained.

After the trimming process is completed, the pressurizing cylinder 1 is in the ascending operation according to the activation command of the control device 21, and is shown in FIGS. 4 (e) to 4 (d) and from FIG. 4 (d). From the respective spray holes 15-1 and 19-1 formed in the respective spray molds 15 and 19 during the transition to c),
A program is installed in a computer in the control device 21 so as to eject air or the like, and the program is installed in the computer.
By activating, the cutting edge portions of the cutting blades 10 and 5 can be cooled, cleaned and washed, and the constituent cutting edges generated during the trimming process can be easily removed.

[0024]

Embodiments of the present invention will be described with reference to the drawings.
In FIG. 1 and FIG. 2, a movable platen 2 is provided, which moves up and down in cooperation with the pressure cylinder 1 located above, so that the lower platen 12 is placed so as to face the movable platen 2. Set up. The lower surface of the movable platen 2, which is a surface facing the upper surface of the lower platen 12, is coaxially connected to the mold 3, the blade 5, and the blade 5.
The cutting cylinder 4 and the cutting cylinder 4 are arranged in a skewer. The blade 5 is expanded and contracted by the cutting cylinder 4 using the mold 3 as a guide. The lower plate 12 has a mold 13 and a blade 1 on the surface facing the movable plate 2.
0 and a cutting cylinder 11 coaxially connected to the blade 10 are mounted in a skewer shape. The blade 10 was expanded and contracted by the cutting cylinder 11 using the mold 13 as a guide.

Next, FIG. 3A is an enlarged view of a main part of FIG. As shown in this figure, in addition to the blade 5 and the cutting cylinder 4 coaxially connected to the blade 5, the end face of the spray die 19 is pressed to slide on the end face of the blade 5 in the mold 3. It is located and installed. The lower surface of this spray mold 19 is the product 1
The spray mold 19 is engraved so as to conform to the shape of No. 7 and the spray hole 19-1 is piercable. This spray hole 19-1 is provided in one or a plurality of numbers depending on the width of the cutting edge of the blade 5 (direction perpendicular to the paper surface). As described above, the number of spray holes 19-1 to be installed is determined to be the optimum number depending on the cooling effect of the blade 5, the spreading state of the lubricating oil, the generation state of the constituent blade edges, and the like.

Further, as shown in FIG. 3A, the spray molds 15 and 19 are provided so that the open heights S _{2 and} S ₁ can be vertically moved by expanding and contracting the springs 14 and 20, respectively. The expansion and contraction strength of each spring 14 and 20 is determined by the amount of trimming cutting force of the product 17. Each of the molds 3 and 13 is provided with guides 18 and 16 so that the movable platen 2 can be easily centered when the movable platen 2 is lowered. Further, the guides 18 and 16 are fitted to the bases of the guides 18 for stopping the stroke of the pressurizing cylinder 1. It is thicker than the mating part, and the tip part is also tapered for easy insertion.

Like the mold 3, the mold 13 has the same structure. That is, in addition to the blade 10 and the cutting cylinder 11, the end surface of the spray mold 15 is provided in the mold 13 so as to slide in pressure contact with the end surface of the blade 10. The upper surface of the spray mold 15 is engraved so as to match the shape of the product 17, and the thickness of the spray mold 15 is such that the spray holes 15-1 can be formed. The spray hole 1
The number 5-1 is one or more depending on the width of the cutting edge of the blade 10. The number of spray holes 15-1 to be installed is 1 for the blade.
The optimum number is determined according to the cooling effect of 0, the spreading state of the lubricating oil, the generation state of the constituent blade edges, and the like.

FIG. 3B shows the spray mold 1 shown in FIG.
9 is a partial enlarged view of the blade 5 and the open height S ₁ of the upper surface of the spray mold 19 and the lower surface of the mold 3 becomes zero at the end of the descending motion of the mold 3, but during the operation of this open height S _1. The end face of the spray die 19 and the end face of the blade 5 are brought into pressure contact sliding contact with each other to prevent the constituent blade edge and remove cutting scraps and the like. In addition, the spray hole 19-1 of the spray mold 19
Then, air, water, or lubricating oil is introduced and circulated, and sprayed from the discharge port of the spray hole 19-1 to the end surface of the blade 5, thereby cooling the blade tip portion of the blade 5 and lubricating oil on the end surface of the blade 5. Since the blades 5 are evenly spread, the sharpness of the blade 5 is extended and the life prolonging effect is remarkable.

In FIG. 3 (c), the open height S ₁ shown in FIG. 3 (d) pushes the upper surface of the product 17 by the downward movement of the die 3, and the reaction force thereof is generated to push the spray die 19 upward. FIG. 6 is a view in which the spring 20 is contracted and shortened by an amount corresponding to the open height S ₁ . In the above state, by circulating the lubricating oil through the spray holes 19-1 formed in the spray mold 19, the lubricating oil is evenly spread on the edge portion of the end surface of the blade 5, so that the trimming in the next step is performed. In the work, since the trimming operation can be performed in a state where the blade 5 has a good sharpness, the cut end of the cut surface cut by the blade 5 becomes a smooth cut surface.

FIGS. 4 (a) to 4 (e) are operation explanatory views from the state in which the product 17 to be trimmed and cut is set in the spray mold 15 to the cutting and separation of unnecessary parts from the product. FIG. 1A shows the product 1 on the upper surface of the spray mold 15.
7, the open height of the lower surface of the mold 3 and the upper surface of the spray mold 19 is S ₁ in a state where they are properly set,
The open height of the lower surface of the spray mold 19 and the upper surface of the product 17 is S ₃ . Further, the open heights of the lower surface of the spray mold 15 and the upper surface of the mold 13 are secured for S _2, respectively.

By shifting from FIG. 4 (a) to FIG. 4 (b), the spray head 6 provided on the mold 3 is cut at a position where the unnecessary portion of the product 17 set on the spray mold 15 is cut.
From the spray nozzle 7 through the spray nozzle 7 and cooled by air or the like.
After that, at the place where the unnecessary part of the product 17 is also cut,
It is in a state of being cooled to the optimum trimming temperature for cutting and separating unnecessary parts of the product 17 by cooling with air or the like. In the cooling operation of the spray, air or the like is sprayed from the spray nozzles 7 and 8 at the same time, or air or the like is alternately sprayed from the spray nozzles 7 and 8 to cool the spray. The injection time is set by a program preset in the computer in the control device 21.

By shifting from FIG. 4 (b) to FIG. 4 (c), the movable platen 2 is extended by the control device 21 by the control device 21, the pressurizing cylinder 1 is extended, and the open height S _{3 is} lowered, so that the product 17 is moved. In the state diagram where the lower surface of the spray mold 19 reaches the upper surface,
During this process (that is, equivalent to open height S ₃ ),
The cutting edge portions of the blades 5 and 10 are the spray molds 19 and 1 respectively.
5 is sprayed from each spray hole 19-1 and 15-1.
Continued to be cooled by air etc.

The transition from FIG. 4 (c) to FIG. 4 (d) is such that the pressurizing cylinder 1 expands when the activation command of the control device 21 continues from the state of FIG. 4 (c). Along with this, the movable platen 2 also continues to descend, and the large-diameter portion of the guide 18 provided on the mold 3 causes the guide 1 provided on the mold 13 to move.
Since it is thicker than the diameter of 6, the extension operation of the pressure cylinder 1 is completely stopped. This stationary state diagram is shown in Figure 4.
It is (d). The extension stroke of the pressurizing cylinder 1 during this period is equivalent to the open height, that is, S ₁ + S ₂ . While the mold 3 is descending the open height S ₁ + S ₂ , the end face of the spray mold 19 and the end face of the blade 5, and the end face of the spray mold 15 and the end face of the blade 10 are pressed and slid against each other. Lubricating oil is sprayed from the spray holes 15-1 provided in the spray mold 15 and the spray holes 19-1 provided in the spray mold 19 to the end faces of the blades 10 and 5, respectively. Since the lubricating oil is evenly spread on the end surface, the sharpness of the cutting blades 10 and 5 when cutting the unnecessary portion of the product 17 is made good. In this way, the end surfaces of the blades 10 and 5 and the end surfaces of the spray dies 15 and 19 are cleaned by pressure contact sliding so that the blade tip portions of the blades 10 and 5 can be maintained in a normal surface state forever. The control device 2 is based on the circuit configuration of FIG. 5 so that the oil, water and lubricating oil can be controlled in accordance with the trimming cycle.
It becomes possible by incorporating it in the program of the computer in 1 and activating it.

By shifting from FIG. 4 (d) to FIG. 4 (e), while holding the product 17, the blade 5 provided in the mold 3 is moved to the cutting cylinder 4 by the activation command of the control device 21. Due to the forward movement, a cut is made in the portion to be cut of the product 17 that has been cooled to the proper trimming temperature, and the product 17 proceeds. Almost at the same time as the cutting operation of the blade 5, the blade 10 provided in the mold 13 is cooled to the proper trimming temperature by the advance of the cutting cylinder 11 also by the activation command of the control device 21. Make a cut on the part to be cut and proceed.

By the blades 10 and 5, the unnecessary portion of the product 17 is cut and separated into the product and the unnecessary portion (illustration of the cut and separated product is omitted).

After the unnecessary portion of the product 17 is cut and separated as described above, the above-described operation mode (FIGS. 4 (a) (b) (c))
The operation sequence opposite to that of (d) and (e), that is, the operation modes of FIGS. 4E to 4D, and 4C and 4B are also provided in the control device 21. , Is preset in a computer program, and by activating this, each cylinder operates as set.

Next, from the completion of the trimming operation, the movable platen 2
The process of returning to the first standby position will be described.

By shifting from FIG. 4 (d) to FIG. 4 (e), unnecessary parts of the product 17 are cut and separated (state diagram of cut and separated is omitted). At this time, the cutting edge parts of the blades 10 and 5 are separated. Causes heat and cutting debris and the like tend to adhere to the blade surface.
For the purpose of removing this and cooling the cutting edge part,
The operation for this purpose is performed by shifting from FIG. 4 (d) to FIG. 4 (c). That is, the spray hole 15-1 in the spray mold 15 and the spray hole 19 in the spray mold 19
From -1, the end faces of the blades 10 and 5 and the end faces of the spray molds 15 and 19 are sprayed while jetting air or the like almost at the same time.
By pressing and sliding, it plays the role of preventing the built-up edge and removing the cutting scraps that adhere.

By shifting from FIG. 4 (c) to FIG. 4 (b), the spray head 6 provided in the mold 3 is provided with die-cutting scraps of small pieces scattered around the spray mold 15.
By introducing air, etc. into the spray nozzle 7,
Air is sprayed around the spray mold 15 to blow away unnecessary residual material for cleaning, or the spray mold 15
It also cools itself to prepare for the trimming work in the next step. If necessary, air may be introduced into the spray head 9 as well so that the spray nozzle 1 can also be sprayed with the spray nozzle 1.
It is also possible to cool 9 and blow off cutting scraps scattered around the spray mold 15 to clean it.

By shifting from FIG. 4B to FIG. 4A, the movable platen 2 is completely lifted to the old position of the upper limit by contraction of the pressurizing cylinder 1, and the movable platen 2 first waits. Stop at position. In this standby position, each spray type 1
By injecting air or the like from the spray holes 19-1 and 15-1 in 9 and 15 to the blade tip portions of the blades 5 and 10, the blade tip portions of the blades 5 and 10 are cooled and the blade tip temperature is lowered. Since the stand-by state is waited for, the trimming work can be performed while maintaining the sharpness of the cutting edge even when the trimming work of the next step is started.

As described above, the blade tip portions of the blades 5 and 10 are constantly in temperature control of the blade tip portions and the surface of the blade surface so as to be in the best state for cutting and separating unnecessary portions of the product 17. The pressure and the flow rate of the lubricating oil or the air introduced into the spray holes 19-1 and 15-1 so as to be lightly covered with the lubricating oil are stored in the computer program in the control device 21 so that they can be properly injected. It is easy to manage the blade tip portions of the blades 5 and 10 by assembling them in and activating them.

FIG. 5 shows an example of piping for the automatic trimming method and apparatus. A circuit configuration for lowering the temperature of the cut point of the product to the optimum temperature for further trimming, such as temperature control of the trimming blade, prevention of the constituent cutting edge, removal of cutting scraps generated when cutting unnecessary parts of the product 17, etc. is there.

In FIG. 5, by opening the stop valves 51, 52, 53, the air, water, or lubricating oil flowing into the pressure adjusting valves 54, 55, 56 is prevented from flowing into the pressure adjusting valves 54, 55. , 56, the working pressure is adjusted to an appropriate pressure and is guided to each solenoid valve 57, 58, 63 (the open state of the solenoid valve is represented as ON and the closed state is represented as OFF). At the outlet side of the solenoid valves 57, 58, 63, each of the spray molds 19 and 15 is used to cool, clean, wash, and clean the cutting edge portion.
The flow rate of lubricating oil, air, etc. required for lubrication is set by each flow rate adjusting valve, 64, 65, 66, 67, 68, and ON / OFF switching operation of each solenoid valve 59, 60, 61, 62, 63 is performed. With each spray type 19 and 15 and each spray head 6
Or 9 or alternatively both spray molds 19 and 15 and spray heads 6 and 9 respectively.

Next, the embodiment shown in FIG. 5 will be described. When cooling each blade 5 and 10 (air cooling) By turning on the solenoid valve 57, each solenoid valve 59 and 60
The air is diverted up to, but when the solenoid valve 59 is in the OFF state (as shown in the drawing), the air is sprayed to the spray molds 19 and 1 respectively.
5 and the spray heads 6 and 9 do not flow. Only when the solenoid valves 57 and 59 are turned on, the pressure preset by the pressure adjusting valve 54 and the flow rate adjusting valve 6 are set.
The flow rate of air set in 4 is applied to each spray mold 19 and 1
5 and passes through the spray holes 19-1 and 15-1 to air-cool the blade tip portions of the blades 5 and 10, and at the same time,
Also clean the cutting edge. At the time of cooling each blade 5 and 10 (in the case of cooling by air and water, this is referred to as cooling by air or the like). Almost at the same time when the solenoid valves 57 and 59 are turned on, the solenoid valve for water 58
And turn 61 on. When the solenoid valves 58 and 61 are turned on, the pressure preset by the pressure regulating valve 55 and the water of the flow rate preset by the flow regulating valve 66 are introduced into the spray molds 19 and 15, respectively. Spray hole 19-
A mixture of air and water passes through 1 and 15-1 and each blade 5
At the same time as cooling the blade edge portions of 10 and 10, cleaning and washing of the blade edge are performed. When injecting lubricating oil to each of the blades 5 and 10, by turning on the solenoid valve 63, the pressure set by the pressure adjusting valve 56 and the lubricating oil having the flow rate set by the flow rate adjusting valve 68 are changed to the spray mold 19 and 15 through each spray hole 19-1 and 15-1,
The computer program in the control device 21 is set so as to inject during the time period when the end faces of 15 and 15 and the end faces of the blades 5 and 10 are pressed and slid, and this is activated to inject the product. In cutting and separating the unnecessary portion of 17, the blades 5 and 10 are operated so that the sharpness of the cutting edges is good. When the lubricating oil is sprayed on the blades 5 and 10, when the solenoid valve 63 is turned on and the solenoid valves 57 and 59 are turned on, a mixture of air and the lubricating oil is introduced to the spray molds 19 and 15. Each spray hole 19-1 and 1
The computer program in the controller 21 is set so as to spray through the 5-1 in the time zone in which the end faces of the spray dies 19 and 15 and the end faces of the blades 5 and 10 are pressed and slid. , The sharpness of the blade tips of the blades 5 and 10 is used to cut and separate the unnecessary portion of the product 17 by activating and spraying the product 17,
Make it work well. During product cooling (cooling with air) When the solenoid valves 57 and 60 are ON, the pressure preset by the pressure regulating valve 54 and the air having the flow rate preset by the flow regulating valve 65 are used for the spray heads. Guided by 6 and 9, the spray nozzles 7 and 8 spray the spots of the product 17 toward the cut portion of the product 17 to cool the cut portion of the product 17 to the optimum temperature for trimming. When the product is cooled (cooled by air etc.) When the solenoid valves 57 and 60 are ON, the solenoid valve 58
When and 62 are turned on, the pressure preset by the pressure adjusting valve 55 and the water of the flow rate set by the flow adjusting valve 67 are mixed with the air flowing in from the solenoid valves 57 and 60, and the air and the water are mixed. Mixture of the spray head 6
And product 9 from each spray nozzle 7 and 8
The part to be cut of the product 17 is cooled to a temperature optimum for trimming by being sprayed toward the part to be cut.

[0045]

Since the trimming device of the present invention is constructed as described above, it has the following effects. According to the structure of claims 1 and 2, in the trimming work for cutting and separating unnecessary parts of the product from the product, the end faces of the cutting edge parts of the respective cutting blades 5 and 10 have the respective spray molds 19.
By spraying pressure contact with the end faces of the spray molds 15 and 15, and spray holes 19-1 and 15 drilled in the spray molds 19 and 15, respectively.
-1 through air, water and lubricating oil to each cutting blade 5
By spraying on the end surfaces of the cutting edge portions of 10 and 10, cooling, cleaning and washing of the cutting edge are performed, and as a result, generation of the constituent cutting edge that occurs when cutting the product is prevented, and the cutting blade 5
And 10 maintain good sharpness for a long time, and as a result, the operating life of each cutting blade 5 and 10 is extended. According to the structure of claims 3 and 4, in the trimming work for cutting and separating unnecessary parts of the product from the product, the trimmed cross section of the cut portion is "chipped" on the product side depending on the material, shape and temperature of the cut part. Cause "complexity",
The apparatus can be set to the optimum trimming temperature for this trimming. As described above, when trimming is performed from the both surfaces by the cutting blades 5 and 10 at substantially the same time, the cut surface of the cut product side has no "notch", and the excellent smooth surface and the top and bottom are guided in a straight line. Since a cut surface with a squareness can be obtained, it is not necessary to provide a surplus for secondary processing on this surface, so labor costs for secondary processing and equipment such as a processing machine are unnecessary. According to the constitutions of claims 5 and 6, in the trimming work for cutting and separating unnecessary parts of the die-cast product, the optimum trimming temperature of the part to be cut is set according to the conditions such as the material, shape and temperature of the part to be cut of the product. Is possible. In addition, the end face of the cutting blade and the spray type end face slide in pressure contact to prevent the constituent blade edge and to cool and clean the blade edge.
Since cleaning and supply of lubricating oil are carried out,
The operating life of the cutting blade is significantly extended. Therefore, there is almost no stoppage of the die casting machine required for exchanging the cutting blade, and as a result, the operation rate of the entire die casting apparatus is improved. According to the constructions of claims 7 and 8, it can be carried out as a line work under a trimming cycle that can be accommodated in the casting cycle without being affected by the material, shape and temperature of the cutting portion of the unnecessary portion of the die casting product, Work automation and efficiency can be achieved.

[Brief description of the figure]

FIG. 1 is a sectional view of the device of the present invention.

FIG. 2 is a cross-sectional view of an operation mode different from FIG.

FIG. 3A is a partially enlarged view of FIG. (B), (c) is operation | movement explanatory drawing of the spray type | mold shown in (a).

4 (a) to 4 (e) are explanatory views showing different operation modes.

FIG. 5 is a piping system diagram of air, water and lubricating oil of the device of the present invention.

[Explanation of symbols]

1 Pressurizing Cylinder 2 Movable Plate 3, 13 Model 4, 11 Cutting Cylinder 5, 10 Blade 6, 9 Spray Head 7, 8 Spray Nozzle 12 Lower Plate 14, 20 Spring 15, 19 Spray Model 15-1, 19-1 Spray Hole 16, 18 Guide 17 Product 21 Control device 51, 52, 53 Stop valve 54, 55, 56 Pressure regulating valve

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[Procedure amendment]

[Submission date] November 28, 1994

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

FIG.

[Fig. 2]

[Figure 4]

[Figure 3]

[Figure 5]

Claims (8)

[Claims] 1. A number of products are relatively soft when trimming die cast products (hereinafter referred to simply as "products") by cutting and removing unnecessary parts such as burrs, biscuits, and runners. By repeating the trimming operation, a cutting edge is formed on the cutting edge of the cutting tool, the sharpness of the cutting edge is impaired, and the shear fracture surface causes "notch" on the product side. In order to prevent this, as shown in Examples, spray molds 19 and 15 are provided for cooling and cleaning the cutting edge portion of the cutting blade, and spray holes 19-1 and 15 are provided in the spray molds 19 and 15. 15-1 is provided by perforating. These spray holes 19-1 and 15-1
To the air or a mixture of air and water (mixing ratio can be adjusted arbitrarily) or lubrication oil is injected and sprayed on the cutting edge of the cutting blade to cool, clean and wash the cutting edge. In the trimming work of unnecessary parts of the product, even when performing repeated trimming work of many products, the end face of the cutting edge portion and the end face of the spray mold slide under pressure so that the cutting blade has good sharpness, An automatic trimming method characterized by cooling, cleaning and cleaning the cutting edge. 2. A trimming operation for cutting and removing unnecessary portions such as burrs, biscuits, and runners in a product, and a large number of products are trimmed, and this trimming operation is repeated, so that the cutting edge of the cutting blade is formed. Occurs, and the sharpness of the cutting blade is impaired, but in order to maintain this sharpness for a long time in a good state, a spray type used for cooling, cleaning, cleaning, spraying lubricating oil, etc., with this spray type A control system that automatically controls the activation of each operation according to a program with a circuit configuration of equipment and piping that can supply air and water or a mixture of air and water, lubricating oil, and a mixture of air and lubricating oil as needed. The automatic trimming device according to claim 1, further comprising a device 21. 3. A trimming operation for cutting and removing unnecessary parts such as burrs, biscuits, and runners in a product, and the cut end trimmed according to the material, shape, temperature, etc. of the part to be cut has a cross section on the product side. In order to secure a squareness, smoothness without "notch" occurs although "notch" occurs.
As a method of cooling the product to the optimum temperature for trimming the product, the trimming dies 3 and 13 are provided with spray heads 6 and 9 and spray nozzles 7 and 8, respectively, and the spray heads 6 and 9 are supplied with air or air. An automatic trimming method characterized in that a mixture of water and water is introduced, and air or the like is sprayed from the spray nozzles 7 and 8 to the cut portion of the product to cool it to an optimum trimming temperature. 4. In the trimming work for cutting and removing unnecessary parts such as burrs, biscuits, and runners in the product, the optimum temperature for the trimming work is determined depending on the material and shape of the part to be cut. The spray heads 6 and 9 and the spray nozzles 7 and 8 are provided in the trimming dies 3 and 13 so that the cutting portion can be lowered to, and air or a mixture of air and water is supplied from each of the spray nozzles 7 and 8. A control device (21) for automatically controlling, in accordance with a program, the action of such an operation that the mixture is sprayed toward the cutting portion to be cooled and the mixing ratio of the mixture can be arbitrarily adjusted. 3. The automatic trimming device described in 3. 5. A trimming operation for cutting and separating unnecessary parts such as burrs, biscuits, and runners from a product in a product, in order to operate the cutting blade with good sharpness and extend the operating life of the cutting blade. 4. The temperature of the part to be cut is lowered to the trimming temperature, which is optimum for the trimming work, in order to obtain a smooth cut edge having no "cut" on the product side. Automatic trimming method. 6. The trimming work for cutting and separating unnecessary parts such as burrs, biscuits, and runners from the product in order to prolong the operating life of the cutting blade, and the cut end of the cutting surface is "broken" on the product side. 5. The automatic trimming device according to claim 2, wherein the temperature of the portion to be cut is lowered to the optimum trimming temperature for the trimming work in order to obtain a smooth cutting cut free from "bursts". 7. A trimming operation for cutting and separating unnecessary parts such as burrs, biscuits, and runners from the product in order to prolong the operating life of the cutting blade, and the cut end of the cut surface on the product side. In order to obtain a smooth cutting edge free from "notch", in order to lower the temperature of the portion to be cut to the optimum trimming temperature for the trimming work, the description of the embodiment and the circuit configuration as illustrated in FIG. Automatic trimming method characterized by. 8. A trimming operation for cutting and separating unnecessary parts such as burrs, biscuits, and runners from the product in order to prolong the operating life of the cutting blade, and the cut end of the cut surface is formed on the product side. In order to obtain a smooth cutting edge without "notch", in order to lower the temperature of the portion to be cut to the trimming temperature, which is optimum for the trimming work, the description of the embodiment and the circuit configuration illustrated in FIG. Cooling, cleaning and washing of the cutting blade, supplying lubricating oil to the cutting blade and cooling the cut part of the product with air or air etc. to lower the temperature to the optimum trimming, a series of operations 8. The automatic trimming device according to claim 7, further comprising a control device 21 for controlling the.