Device for sawing off a sprue of a die casting

Abstract

The utility model discloses a kind of die casting sawing water gap devices, including machine table, vertical sawing machine, slide rail auxiliary pushing mechanism and bearing platform;Machine table provides stable support datum as a whole;Vertical sawing machine is installed on machine table, is equipped with work area;Slide rail auxiliary pushing mechanism is located in machine table and is located in work area, can drive bearing platform to reciprocate smoothly, replace artificial push;Bearing platform is detachably connected on slider, multiple detachable positioning columns are connected in positioning hole, and the space of fixed die casting is formed by surrounding.This application reduces manual physical exertion through slide rail auxiliary pushing mechanism, reduces the risk of hand and saw contact;Adjustable positioning column of bearing platform ensures die casting stable positioning, resists sawing vibration, avoids workpiece deviation and surface damage, adapts to the quick change of multiple-specification die casting, improves sawing efficiency, product yield and operation safety, and is suitable for water gap sawing post-processing operation of various die castings in die casting production.

Description

Technical Field

[0001] This utility model relates to the technical field of die casting processing equipment, and in particular to a die casting sawing device for sprue cutting. Background Technology

[0002] In the die casting production process, the runner system is an essential component to ensure that the molten metal fills the mold cavity smoothly and to ensure the quality of the die casting. The sprue (i.e. the connecting part formed when the molten metal is filled) in the runner system must be removed in time after the die casting is formed in order to meet the requirements of product appearance and dimensional accuracy.

[0003] Currently, sprue removal methods include sawing, shearing, and grinding. Among these, sawing is widely used for sprue removal of medium to large-sized or high-hardness die castings due to its clean cut and wide applicability. However, existing sawing methods still have many technical drawbacks. Conventional sawing requires operators to press and hold the die casting with both hands while manually pushing the product forward to the saw blade for cutting. For heavy or large die castings, operators need to continuously apply significant pressure to counteract sawing vibrations. Prolonged operation can easily lead to arm fatigue, and the close proximity of the hand to the high-speed rotating saw blade makes it easy for accidents such as hand cuts or saw blade breakage to occur if the pressure is unstable or the push is misaligned. On the other hand, the high-speed rotation of the saw blade during the sawing process generates continuous vibration. This vibration is transmitted to the die-casting part through the sawing machine. If the operator applies uneven pressure or the pushing speed is unstable, it can easily cause the relative position of the die-casting part and the saw blade to shift. This not only results in incomplete sawing of the sprue (residual parts requiring secondary processing), but may also cause the surface of the die-casting part to rub and collide with the worktable or sawing machine components, leading to scratches, dents, and other surface damage. This is especially problematic for die-casting parts with high surface finish requirements (such as automotive parts and appliance casings), significantly reducing the yield rate. Therefore, existing sawing equipment suffers from problems such as high difficulty in manual operation, low safety, and poor processing accuracy due to the susceptibility of die-casting parts to damage. Utility Model Content

[0004] This utility model aims to at least partially solve one of the problems in related technologies. Therefore, one of the objectives of this utility model is to provide a die-casting part sawing device for achieving rapid positioning, shock-resistant sawing, and low-intensity pushing of die-casting parts, thereby improving sawing efficiency and product yield while ensuring operational safety.

[0005] A device for sawing sprue gates on die-cast parts, the device comprising: Machine tool; A vertical saw is mounted on the machine base. The vertical saw has a working area, and a saw blade is provided in the working area. An auxiliary pushing mechanism is mounted on the machine base and positioned within the working area of ​​the vertical saw. The auxiliary pushing mechanism includes a slide rail and a slider. The slide rail is parallel to the cutting direction of the saw blade and positioned within the working area. The slider is slidably fitted onto the slide rail. The support platform is detachably connected to the slider so that the support platform can slide back and forth in the working area along the slide rail via the slider. The support platform is provided with multiple positioning holes and multiple detachable positioning posts, and the multiple detachable positioning posts enclose a fixed space for accommodating the die-casting part.

[0006] Furthermore, the vertical saw includes a main cutting system, which includes a saw blade, a transmission mechanism for driving the saw blade, and a feed device for controlling the cutting motion of the saw blade.

[0007] Furthermore, the plurality of positioning holes on the support platform are arranged in an array, and the plurality of detachable positioning posts are positioned in the positioning holes by means of insertion and removal.

[0008] Furthermore, there are two slide rails, both of which are located within the working area and spaced apart, and each slide rail has two sliders.

[0009] Furthermore, the length of the slide rail covers the working area of ​​the vertical saw and extends beyond the working area.

[0010] Furthermore, the positioning hole is a threaded hole, and one end of the positioning post is provided with an external thread. The positioning post is threadedly connected to the positioning hole through the external thread.

[0011] Furthermore, the platform surface is made of stainless steel.

[0012] Furthermore, the surface of the support platform is provided with an anti-rust coating.

[0013] Furthermore, the positioning post is made of cemented carbide.

[0014] Furthermore, the saw blade of the vertical saw is made of high-speed steel.

[0015] Compared with the prior art, the above-mentioned technical solution provided in this application has the following advantages: This application replaces manual pushing with an auxiliary pushing mechanism. The operator only needs to complete the placement and positioning of the die-casting part. The pushing action is completed by the operator's hand in conjunction with the slide rail slider, which can reduce the physical exertion of the operator. Moreover, the operator's hands do not need to be close to the saw blade, which reduces the accident rate. In addition, the adjustable positioning column of the bearing platform encloses the fixed space, which, together with the auxiliary clamping mechanism, can effectively counteract sawing vibration, reduce damage to the die-casting part, and improve processing accuracy. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] In the attached image: Figure 1 This is a schematic diagram of the structure of an embodiment of the die-casting cutter for cutting sprues according to this application; Figure 2 This is a schematic diagram of the structure from another perspective of an embodiment of the die-casting gate sawing device of this application; Figure 3 This is a structural schematic diagram from another perspective of an embodiment of the die-casting cutter for the sprue of this application. Figure 4 This is a structural schematic diagram from another perspective of an embodiment of the die-casting cutter for the sprue of this application. Figure 5 This is a schematic diagram of the auxiliary pushing mechanism and the supporting platform in one embodiment of the die-casting part sawing gate device of this application.

[0019] Figure label: 1. A device for sawing sprues on die-cast parts; 10. Machine base; 20. Vertical saw; 21. Working area; 22. Saw blade; 23. Transmission mechanism; 24. Feeding device; 30. Auxiliary pushing mechanism; 31. Slide rail; 32. Slider; 40. Bearing platform; 41. Positioning hole; 42. Positioning column. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] like Figure 1 - Figure 5 As shown, the die-casting part sawing device 1 provided in this application includes: 10 machines; A vertical saw 20 is mounted on the machine base 10. The vertical saw 20 is provided with a working area 21, and a saw blade is provided in the working area 21. An auxiliary pushing mechanism 30 is mounted on the machine base 10 and positioned within the working area 21 of the vertical saw 20. The auxiliary pushing mechanism 30 includes a slide rail 31 and a slider 32. The slide rail 31 is parallel to the cutting direction of the saw blade and is positioned within the working area 21. The slider 32 is slidably fitted onto the slide rail 31. The support platform 40 is detachably connected to the slider 32 so that the support platform 40 can slide back and forth in the working area 21 along the slide rail 31 via the slider 32. The support platform 40 is provided with a plurality of positioning holes 41 and a plurality of detachable positioning posts 42, and the plurality of detachable positioning posts 42 enclose a fixed space for accommodating the die-casting part.

[0023] The slide rail 31 and the auxiliary pushing mechanism 30 replace manual pushing by both hands. The operator only needs to place and position the workpiece. The pushing action is completed automatically (or semi-automatically) by the slider 32 along the slide rail 31, which reduces physical exertion. The cooperation between the slide rail 31 and the slider 32 can stably transmit the pushing force without the need for continuous manual force. The carrying platform 40 fixes the workpiece by the positioning posts 42. The operator's hands do not need to directly press the workpiece close to the saw blade. During the pushing process, the workpiece moves along the fixed trajectory with the platform, avoiding close contact between the hands and the saw blade, reducing the accident rate. The fixed space enclosed by multiple positioning posts 42 can limit the displacement of the workpiece during the sawing process and prevent the workpiece from shifting due to vibration.

[0024] The workflow is as follows: Based on the dimensions of the die-cast part to be processed, select a suitable support platform 40, ensuring that the surface of the support platform 40 is clean and free of sawdust and impurities. Then, using the positioning holes 41 arranged in an array on the support platform 40, install multiple detachable positioning pins 42 into the corresponding positioning holes 41. If the positioning hole 41 is a threaded hole, connect and fix it to the positioning hole 41 through the external thread of one end of the positioning pin 42. If it is a plug-in positioning hole 41, directly insert the positioning pin 42 and fix it through the elastic locking structure, so that multiple positioning pins 42 surround and form a fixed space that matches the contour of the die-cast part.

[0025] Place the die-cast part with the sprue to be sawed smoothly into the fixed space enclosed by the positioning column 42, ensuring that the sprue part of the die-cast part extends beyond the edge of the bearing platform 40 and that the surface of the die-cast part is in close contact with the table surface of the bearing platform 40; check the position of the die-cast part and confirm that the sprue sawing mark is aligned with the cutting path of the saw blade of the vertical saw 20 to avoid sawing deviation.

[0026] The operator confirms that there are no foreign objects in the working area 21 of the vertical sawing machine 20, closes the protective door of the working area 21, and starts the control switch of the auxiliary pushing mechanism 30 of the slide rail 31; the two spaced slide rails 31 of the auxiliary pushing mechanism 30 of the slide rail 31 start to work, and the slider 32 on the slide rail 31 drives the bearing platform 40 to move slowly along the direction of the slide rail 31, and smoothly pushes the die-casting part into the working area 21 of the vertical sawing machine 20.

[0027] When the sprue of the die-cast part reaches the cutting position of the saw blade, the main cutting system of the vertical sawing machine 20 is activated, the transmission mechanism 23 drives the saw blade to rotate at high speed, and at the same time the feed device 24 controls the saw blade to move downward at a preset feed speed to saw the sprue of the die-cast part. During the sawing process, coolant is continuously sprayed to remove the heat generated by sawing. The sawdust flows with the coolant to the preset collection area or is collected by the sawdust collection structure below the working area 21. The slide rail 31 assists the pushing mechanism 30 to continuously drive the bearing platform 40 to move slowly to ensure that the sprue is completely in the sawing range until the sprue is separated from the die-cast part body.

[0028] After the sprue is cut, the main cutting system of the vertical saw 20 stops working, the saw blade stops rotating, and the feed device 24 drives the saw blade to return to the initial position. At the same time, the auxiliary pushing mechanism 30 of the slide rail 31 runs in reverse, and the slider 32 drives the carrying platform 40 to move along the slide rail 31 to the outside of the working area 21 until the carrying platform 40 completely exits the working area 21 and returns to the initial loading position.

[0029] Furthermore, the vertical saw 20 includes a main cutting system, which includes a saw blade 22, a transmission mechanism 23 for driving the saw blade 22, and a feed device 24 for controlling the cutting motion of the saw blade 22.

[0030] The transmission mechanism 23 provides stable power output, ensuring the saw blade 22 cuts at a constant speed, avoiding burrs on the cut due to speed fluctuations. The feed device 24 precisely controls the feed speed of the saw blade 22, preventing jamming due to excessive feed or reduced efficiency due to insufficient feed. The stable power output of the transmission mechanism 23 reduces the impact load on the saw blade 22, preventing tooth breakage due to sudden increases in speed. The smooth control of the feed device 24 reduces rigid collisions between the saw blade 22 and the workpiece, lowering the wear rate of the saw blade 22. The preset control function of the feed device 24 replaces manual adjustment of the saw blade 22 position, eliminating the need for operators to rely on experience to judge the feed speed; they only need to start the equipment according to the parameter settings.

[0031] Furthermore, the plurality of positioning holes 41 on the support platform 40 are arranged in an array, and the plurality of detachable positioning posts 42 are positioned in the positioning holes 41 by means of insertion and removal.

[0032] The positioning holes 41 are arranged in an array, providing multiple installation positions for the positioning posts 42, allowing for flexible selection of positioning points according to the workpiece size. Secondly, the positioning posts 42 engage with the positioning holes 41 via a plug-in / pull-out method, enabling quick insertion or removal without tools and facilitating rapid adjustment of the positioning posts 42. Multiple positioning posts 42 can be installed around the edge of the workpiece, forming a fixed space that conforms to the workpiece contour, ensuring workpiece stability and enabling rapid adaptation to die-cast parts of different sizes.

[0033] The array of positioning holes 41 provides a wide range of positioning point options. When changing workpieces, only the installation position of the positioning pins 42 in different positioning holes 41 needs to be adjusted, without disassembling or replacing the support platform 40, thus shortening the positioning time per cycle. The plug-in connection eliminates the need for tools such as wrenches and screwdrivers, allowing operators to manually install and remove the positioning pins 42, making it particularly suitable for scenarios with frequent model changes in mass production. The fixed space enclosed by the positioning pins 42 can constrain workpiece displacement from multiple directions and resist sawing vibrations; furthermore, the plug-in connection of the positioning pins 42 can be adjusted to match the workpiece's center of gravity, preventing workpiece deformation caused by excessive local pressure.

[0034] Furthermore, there are two slide rails 31, both of which are located within the working area 21 and spaced apart. Each slide rail 31 has two sliders 32.

[0035] There are two slide rails 31, spaced apart parallel to the cutting direction, forming a symmetrical support structure. Each slide rail 31 has two sliders 32, and the four sliders 32 together support the four bottom corners of the support platform 40. The double slide rails 31 ensure the parallelism between the pushing direction and the cutting direction, avoiding unilateral deviation. The double sliders 32 on each rail increase the contact area between the sliders 32 and the slide rail 31, dispersing the weight of the support platform 40 and the impact force generated by sawing vibration, reducing local wear.

[0036] Furthermore, the length of the slide rail 31 covers the working area 21 of the vertical saw 20 and extends outward from the working area 21.

[0037] The main body of the slide rail 31 covers the working area 21 of the vertical saw 20, ensuring that the workpiece can fully enter the working area 21 for sawing during the pushing process. Simultaneously, the slide rail 31 extends a distance outside the working area 21, forming an loading and unloading station. Operators can place and position the workpiece on the extended slide rail 31, and then push the carrying platform 40 to the working area 21 for cutting via the slider 32. For workpieces with long sprues, the extended slide rail 31 provides sufficient pushing stroke to ensure the sprue fully enters the sawing range. The extended slide rail 31 provides more space for workpiece placement, eliminating the need for operators to bend over or reach into the working area 21 to place workpieces. Especially for heavy workpieces, they can be first placed stably on the carrying platform 40 in the extended section before being pushed to the working area 21, reducing physical exertion during handling. The loading and unloading process is completed outside the working area 21. At this time, the workpiece is far away from the high-speed rotating saw blade, avoiding safety accidents caused by accidental contact with the saw blade. At the same time, the slide rail 31 of the extension part can serve as a buffer area. If an abnormality occurs during the pushing process, the machine can be stopped in time before the workpiece enters the working area 21, reducing the harm of the accident.

[0038] Furthermore, the positioning hole 41 is a threaded hole, and one end of the positioning pin 42 is provided with an external thread. The positioning pin 42 is threadedly connected to the positioning hole 41 through the external thread.

[0039] The positioning hole 41 is designed as an internally threaded hole, and one end of the positioning pin 42 is machined with a matching external thread. The positioning pin 42 is fixed to the bearing platform 40 by thread engagement. The height of the positioning pin 42 can be adjusted by controlling the engagement depth of the threaded connection to accommodate die-cast parts of different thicknesses. Compared with the plug-in type, the preload of the threaded connection can resist sawing vibration and prevent the positioning pin 42 from loosening. At the same time, the detachability of the threaded connection is still retained, and the position of the positioning pin 42 can be changed according to the workpiece requirements.

[0040] Furthermore, the platform surface of the support platform 40 is made of stainless steel.

[0041] The countertop is made of stainless steel, usually 304 or 316 stainless steel. Its core characteristics include: first, strong corrosion resistance, which can resist long-term erosion by emulsions, cutting oils and other coolants, and prevent the countertop from rusting; second, high hardness, which can resist friction and scratches from metal shavings; and third, good material stability, which is not easily deformed at high temperatures, ensuring that the countertop remains flat for a long time.

[0042] Furthermore, the surface of the support platform 40 is provided with an anti-rust coating.

[0043] The anti-rust coating prevents impurities in the coolant from directly contacting the stainless steel countertop, avoiding localized rust in tiny crevices. Even in long-term humid environments, the countertop will not develop rust spots, further extending its lifespan. The coating's high hardness resists high-frequency friction from metal shavings, preventing scratches on the countertop. Even in the event of minor friction, the coating acts as a buffer, reducing damage to the stainless steel substrate.

[0044] Furthermore, the positioning post 42 is made of cemented carbide.

[0045] The high hardness of cemented carbide makes the tip of the locating post 42 resistant to wear. Even after long-term use, the dimensional error of the locating post 42 remains very small, preventing workpiece positioning misalignment due to wear. The high bending strength of cemented carbide allows it to withstand the reaction force of heavy workpieces without bending deformation, ensuring that the locating post 42 always remains vertical and stably constrains the workpiece from multiple directions. The arc-shaped design of the tip of the locating post 42, combined with the high hardness of cemented carbide, prevents sharp edges from scratching the workpiece surface; at the same time, the larger arc-shaped contact area disperses the positioning pressure, preventing indentations on the workpiece surface.

[0046] Furthermore, the saw blade of the vertical saw 20 is made of high-speed steel.

[0047] High-speed steel saw blades are renowned for their excellent red hardness, maintaining high hardness at high temperatures to ensure sawing efficiency and cut quality. The high-hardness cutting edge effectively cuts through the sprue of die-cast parts, reducing sawing resistance and frictional heat, preventing softening or breakage due to overheating of the saw blade. Simultaneously, the wear resistance of high-speed steel extends the saw blade's lifespan, reducing replacement frequency and improving production efficiency. The design of the saw blade must consider the cutting angle and tooth pitch. A reasonable cutting angle reduces resistance during sawing, improving efficiency; an appropriate tooth pitch ensures coolant penetration into the sawing area, carrying away cutting heat, lowering the temperature of the saw blade and workpiece, and further extending the saw blade's lifespan.

[0048] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A device for sawing sprue nozzles on die-cast parts, characterized in that, include: Machine tool; A vertical saw is mounted on the machine base. The vertical saw has a working area, and a saw blade is provided in the working area. An auxiliary pushing mechanism is provided on the machine base and positioned within the working area of ​​the vertical saw. The auxiliary pushing mechanism includes a slide rail and a slider. The slide rail is arranged in the working area parallel to the cutting direction of the saw blade, and the slider is slidably engaged with the slide rail. as well as The support platform is detachably connected to the slider so that the support platform can slide back and forth in the working area along the slide rail via the slider. The support platform is provided with multiple positioning holes and multiple detachable positioning posts, and the multiple detachable positioning posts enclose a fixed space for accommodating the die-casting part.

2. The device for sawing sprues in die-cast parts according to claim 1, characterized in that, The vertical saw includes a main cutting system, which includes a saw blade, a transmission mechanism for driving the saw blade, and a feed device for controlling the cutting motion of the saw blade.

3. The device for sawing sprues in die-cast parts according to claim 2, characterized in that, The plurality of positioning holes on the bearing platform are arranged in an array, and the plurality of detachable positioning posts are positioned in the positioning holes by means of insertion and removal.

4. The device for sawing sprues in die-cast parts according to claim 1, characterized in that, The number of slide rails is two, both of which are located within the working area and are spaced apart. Each slide rail is provided with two sliders.

5. A device for sawing sprues in die-cast parts according to any one of claims 1 to 4, characterized in that, The length of the slide rail covers the working area of ​​the vertical saw and extends beyond the working area.

6. A sawing device for cutting sprues on die-cast parts according to any one of claims 1 to 4, characterized in that, The positioning hole is a threaded hole, and one end of the positioning pin is provided with an external thread. The positioning pin is threadedly connected to the positioning hole through the external thread.

7. A sawing device for cutting sprues on die-cast parts according to any one of claims 1 to 4, characterized in that, The platform surface is made of stainless steel.

8. The device for sawing sprues in die-cast parts according to claim 1, characterized in that, The surface of the support platform is coated with an anti-rust coating.

9. The device for sawing sprues in die-cast parts according to claim 1, characterized in that, The positioning post is made of cemented carbide.

10. A device for sawing sprues in die-cast parts according to claim 1, characterized in that, The saw blade of the vertical saw is made of high-speed steel.

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