CNC jig for intelligent equipment white chip machining

Abstract

A CNC jig for intelligent equipment white sheet machining comprises a connecting base, a product base and a positioning assembly, and a first air hole and a second air hole are formed in the connecting base; the product base is fixed to the top of the connecting base, an adsorption groove is formed in the upper surface of the product base, a third air hole is formed in the middle of the bottom of the adsorption groove, and a fourth air hole communicating with the second and third air holes is formed in the lower surface of the base; a supporting block of which the upper surface is flush with the edge of a notch of the adsorption tank is arranged in the adsorption tank; the positioning assembly comprises a sliding table air cylinder, an explorator and an adjusting pin. The sliding table air cylinder comprises a cylinder body, a piston rod inserted into the cylinder body in a sliding mode, an air cylinder shell fixed to the tail end of the piston rod and a position detection switch installed on the cylinder body. The upper surface of the cylinder shell is provided with an L-shaped notch for containing the explorator, the adjusting pin penetrates through the side wall of the L-shaped notch and abuts against the explorator, the adjusting pin pushes the explorator to be close to or away from the product base, the upper surface of the explorator is higher than the upper surface of the product base, and the explorator forms a product limiting area beside the product base.

Description

Technical Field

[0001] The utility model relates to the technical field of CNC processing, in particular to a CNC fixture used for processing white sheets of intelligent devices. Background Art

[0002] White sheets are defective parts detected from the original sheets after packaging. In order to reduce manufacturing costs, white sheets often need to be processed by CNC (Computer numerical control) for recycling, so that they can be further sold to downstream channels as qualified products to reduce material waste. In the processing of white sheets (glass) for notebook computer accessories, it is necessary to successively perform cutting, sandblasting, silk screen protection oil, remove protective oil, liquid polishing, secondary cutting, CNC processing, hardening, silk screen printing, coding, and shipping. Among them, during CNC processing, the workpiece is usually fixed on the base and finely engraved. The positioning accuracy of the workpiece directly determines the yield rate of the fine engraving operation. At present, the precision carving base jigs of CNC machines on the market adopt a contoured design, and an exhaust notch is set on the base jig corresponding to the long side of the glass. After the glass is put on the machine, the air suction hole of the base jig completely absorbs the glass. Since the exhaust position (exhaust notch) of the base jig is set in the CNC processing area, when the CNC precision carving tool reaches the exhaust position, the glass vibrates greatly and deviations are prone to occur during cutting, resulting in poor glass edge effects, which in turn affects product strength and reduces product yield. Utility Model Content

[0003] Based on this, it is necessary to provide a CNC fixture for white chip processing of smart devices with good product positioning effect and high yield to address the above shortcomings.

[0004] A CNC fixture for processing white pieces of smart devices, comprising:

[0005] A connecting base, wherein a first air hole for connecting to an external air pressure device is provided on a side of the connecting base, a second air hole is provided in the middle of an upper surface of the connecting base, and a first air passage connecting the first air hole and the second air hole is provided inside the connecting base;

[0006] A product base, the product base is located above the connecting base and is fixedly connected to the upper surface of the connecting base, an adsorption groove is provided on the upper surface of the product base, the groove edge of the adsorption groove forms an adsorption working surface, a second air channel is provided in the product base, the second air channel runs through the upper surface of the product base and forms a third air hole in the middle of the groove bottom of the adsorption groove, the second air channel runs through the lower surface of the product base and forms a fourth air hole connected with the second air hole; a support block is provided in the adsorption groove, and the upper surface of the support block is flush with the groove edge of the adsorption groove; and

[0007] A positioning assembly, the positioning assembly includes a slide cylinder, a backing mold and an adjusting pin arranged on the side of the connecting base, the slide cylinder includes a cylinder body for communicating with an external air pressure device, a piston slidably inserted into the inner cavity of the cylinder body and sealedly connected to the inner cavity of the cylinder body, a piston rod fixed on the piston and extended from the cylinder body, a cylinder shell fixed at the end of the piston rod and slidably matched with the outer surface of the cylinder body, and a position detection switch installed on the cylinder body and used for electrically connecting to the controller of the CNC machine; an L-shaped notch is provided on the upper surface of the cylinder shell, the backing mold is accommodated in the L-shaped notch, the adjusting pin passes through the side wall of the L-shaped notch and cooperates with the backing mold limit, the backing mold is driven by the adjusting pin to approach or move away from the product base, the upper surface of the backing mold is higher than the upper surface of the product base, and the backing mold forms a product limit area on the side of the product base.

[0008] In one of the embodiments, the cylinder body of the slide cylinder is fixed on the side wall of the connection base.

[0009] In one embodiment, the CNC fixture also includes a base, which is provided with a first mounting groove and a second mounting groove located next to the first mounting groove, the connecting base is embedded in the first mounting groove and fixedly connected to the base, and the cylinder body of the slide cylinder is embedded in the second mounting groove and fixedly connected to the base.

[0010] In one embodiment, the number of the support block is one, and a plurality of criss-cross grooves communicating with the third air holes are formed on the upper surface of the support block.

[0011] In one of the embodiments, the number of the support blocks is greater than or equal to two, the support blocks are spaced apart in the adsorption groove, and an air guide groove communicating with the third air hole is formed between adjacent support blocks.

[0012] In one embodiment, the support mold includes a transverse portion and a vertical portion perpendicularly connected to the end of the transverse portion, the transverse portion extends along the length direction of the product base, and the vertical portion extends along the width direction of the product base, and the transverse portion and the vertical portion are respectively used to abut against the edge of the product.

[0013] In one embodiment, a plurality of notches are respectively formed on the inner side surface of the horizontal portion of the backing mold and the inner side surface of the vertical portion of the backing mold.

[0014] In one embodiment, the adjusting pin is provided with an external thread, and a threaded hole connected to the L-shaped notch is provided on the cylinder housing. The adjusting pin passes through the threaded hole and is threadedly matched with the threaded hole. A slot is provided on the side of the mold, and a limiting ring is fixed to the edge of the slot. The inner diameter of the limiting ring is smaller than the diameter of the slot. An annular groove is provided on the adjusting pin near its end, and the end of the adjusting pin is inserted into the slot, and the edge of the center hole of the limiting ring is embedded in the annular groove and is limitedly matched with the inner surface of the annular groove.

[0015] In one of the embodiments, at least one guide through hole is opened on the mold, and the guide through hole extends along the width direction of the product base. A limit pin is provided in the L-shaped notch, which passes through the guide through hole and is fixedly connected to the upper surface of the cylinder shell.

[0016] In one embodiment, a sealing ring is provided at the connection portion between the second air hole and the fourth air hole.

[0017] The CNC jig for processing white sheets of intelligent devices of the utility model is implemented, by arranging a lifting and horizontally adjustable supporting mold beside the product base, so as to limit the processing station of the product; by opening an air hole in the middle of the product base as an exhaust channel, the force on the bottom of the product is evenly applied, and at the same time, the lower surface of the product is supported by the support block in the adsorption groove, which ensures that the force on the product is even and prevents the product from being damaged by excessive force from the tool during the fine carving process. The edge exhaust structure design of the original contour base suction jig is replaced, which can avoid the problem of insufficient consistency in product edge processing caused by the shaking of the product edge, improves the stability of product positioning, and can improve the yield rate of product fine carving operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a CNC fixture in one embodiment of the utility model;

[0019] Figure 2 This is a structural schematic diagram of a connecting base in one embodiment of the utility model;

[0020] Figure 3 This is a structural schematic diagram of a product base in one embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of a base in one embodiment of the utility model;

[0022] Figure 5 for Figure 1 A schematic diagram of the local enlarged structure of part A in the illustrated embodiment. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0024] See also Figure 1 The utility model discloses a CNC fixture 10 for processing white sheets of smart devices with good product positioning effect and high yield. The CNC fixture includes a connecting base 100, a product base 200 and a positioning component 300, wherein the connecting base 100 is used to access negative pressure from an external air pressure device so that the product base 200 can adsorb and position the product to be processed; the product base 200 is used as a receiving position and adsorption position for the product to be processed to prevent the product from shaking during the processing; the positioning component 300 is used to limit the position of the product when it is processed on the CNC machine, so that the product is aligned with the tool of the CNC machine to ensure the accuracy of the fine carving operation.

[0025] For details, please combine Figure 1-3 , a first air hole 110 for connecting to an external air pressure device is provided on the side of the connecting base 100, a second air hole 120 is provided in the middle of the upper surface of the connecting base 100, and a first air passage connecting the first air hole 110 and the second air hole 120 is provided inside the connecting base 100. Further, an air pipe joint is provided at the first air hole 110, and a solenoid valve electrically connected to the controller of the CNC machine is provided on the connecting pipeline between the air pipe joint and the external air pressure device. In this way, when the product is mounted on the machine, the on-off of the air path at the air pipe joint can be controlled by the controller of the CNC machine so as to adsorb the product on the product base 200. In addition, by providing the first air hole 110 on the side of the connecting base 100, the difficulty of arranging the air pipe joint and the connecting pipeline can be reduced. In actual operation, according to the arrangement of the plant equipment, the connecting base 100 can also be mounted on the bracket so that the bottom of the connecting base 100 is exposed. At this time, the first air hole 110 can be provided on the bottom surface of the connecting base 100.

[0026] The product base 200 is located above the connection base 100 and is fixedly connected to the upper surface of the connection base 100. Preferably, an annular boss 210 is provided at the bottom edge of the product base 200, and the product base 200 is fixedly connected to the connection base 100 by penetrating the annular boss 210 and inserting the bolts of the connection base 100. Of course, a ring platform that fits the annular boss 210 can be further provided at the top edge of the connection base 100, and the product base 200 is fixedly connected to the connection base 100 by clamping the annular boss 210 and the clamp of the ring platform. An adsorption groove 220 is provided on the upper surface of the product base 200, and the groove edge of the adsorption groove 220 forms an adsorption working surface. A second air channel is provided in the product base 200, and the second air channel runs through the upper surface of the product base 200 and forms a third air hole 230 in the middle of the groove bottom of the adsorption groove 220. The second air channel runs through the lower surface of the product base 200 and forms a fourth air hole connected to the second air hole 120. In this embodiment, by providing the adsorption groove 220, the area enclosed by the adsorption working surface can be increased. In this way, when the product is placed on the upper surface of the product base 200 and the first air hole 110 is connected to the external air pressure device, since the first air hole 110, the first air channel, the second air channel 120, the fourth air hole, the second air channel and the third air hole 230 are connected, a negative pressure will be formed in the adsorption groove 220 and act on the bottom of the product. In other words, the provision of the adsorption groove 220 increases the negative pressure action area at the bottom of the product, so that the edge of the product fits firmly with the edge of the notch of the adsorption groove 220, which can avoid the loosening of the edge of the product and improve the stability of product adsorption. A support block 240 is provided in the adsorption groove 220, and the upper surface of the support block 240 is flush with the edge of the groove of the adsorption groove 220. By setting the support block 240, the middle area of ​​the product can be supported to avoid damage or breakage of the middle part of the product caused by excessive negative pressure. While ensuring that there is a sufficiently large negative pressure to allow the product to be adsorbed and fixed on the product base 200 and improve the adsorption stability of the product, poor product processing can be reduced.

[0027] In order to avoid the problem of loose product adsorption caused by air leakage in the CNC fixture, in one embodiment, a sealing ring is provided at the connecting portion between the second air hole 120 and the fourth air hole. The sealing ring can be pasted on the upper surface of the connecting base 100 and abutted against the lower surface of the product base 200, or can be pasted on the lower surface of the product base 200 and abutted against the upper surface of the connecting base 100. Of course, an annular sealing groove can also be opened on the upper surface of the connecting base 100 or the lower surface of the product base 200, and the sealing ring is embedded in the annular sealing groove to limit the sealing ring. When the connecting base 100 and the product base 200 are assembled, the sealing ring blocks the gap between the second air hole 120 and the fourth air hole under the joint extrusion of the product base 200 and the connecting base 100 to avoid air leakage, thereby ensuring the stability of the air pressure in the CNC fixture and the reliability of product adsorption and positioning.

[0028] The positioning assembly 300 includes a slide cylinder 310, a mold 320 and an adjustment pin 330 arranged next to the connecting base 100. The slide cylinder 310 includes a cylinder body 311 for communicating with an external air pressure device, a piston (not shown in the figure) slidably inserted into the inner cavity of the cylinder body 311 and sealedly connected to the inner cavity of the cylinder body 311, a piston rod (not shown in the figure) fixed on the piston and extending from the cylinder body, a cylinder housing 312 fixed at the end of the piston rod and slidingly matched with the outer surface of the cylinder body 311, and a position detection switch 313 installed on the cylinder body 311 and used for electrically connecting to the controller of the CNC machine. The cylinder body 311 is connected to the external air pressure device through a pipe joint 314. In this embodiment, a solenoid valve is provided on the connection pipeline between the pipe joint 314 and the external air pressure device. The solenoid valve is electrically connected to the controller of the CNC machine. The solenoid valve is activated when receiving an electrical signal sent by the controller of the CNC machine, and compressed gas or exhaust gas is introduced into the inner cavity of the cylinder body 311, so that the piston rod and the piston rod rise or fall synchronously, and drive the cylinder housing 312 to rise and fall. The position detection switch 313 is used to detect the lifting and lowering position of the cylinder housing 312 on the cylinder body 311. When the cylinder housing 312 slides to a preset position on the cylinder body 311, the position detection switch 313 sends an electrical signal to the controller of the CNC machine so that the controller controls the solenoid valve to disconnect, thereby achieving the purpose of controlling the height of the cylinder housing 312 and the mold 320. An L-shaped notch 315 is provided on the upper surface of the cylinder housing 312, and the opening of the L-shaped notch 315 faces the product base 200 (such as Figure 1 As shown in the figure, the backing mold 320 is accommodated in the L-shaped notch 315. It can also be understood that the side wall of the L-shaped notch 315 is used to limit the backing mold 320. In this embodiment, an L-shaped limiting piece can be set on the upper surface of the cylinder shell 312 to enclose the L-shaped notch 315 on the upper surface of the cylinder shell 312 through the L-shaped limiting piece, or the upper surface of the cylinder shell 312 can be recessed to form the L-shaped notch 315. The adjusting pin 330 penetrates the side wall of the L-shaped notch 315 and cooperates with the backing mold 320 to limit the position. The backing mold 320 is driven by the adjusting pin 330 to approach or move away from the product base 200. The upper surface of the backing mold 320 is higher than the upper surface of the product base 200, and the backing mold 320 forms a product limiting area beside the product base 200. It should be noted that in this embodiment, the position of the backing mold 320 relative to the product base 200 is adjusted by the adjusting pin 330, which can adapt to the CNC precision carving of products of different sizes. By limiting the upper surface of the support mold 320 to be higher than the upper surface of the product base 200, the support mold 320 can be abutted against the edge of the product to limit the edge of the product so as to guide the product.

[0029] Furthermore, the backing mold 320 includes a horizontal portion 321 and a vertical portion 322 vertically connected to the end of the horizontal portion 321, the horizontal portion 321 extends along the length direction of the product base 200, and the vertical portion 322 extends along the width direction of the product base 200, and the horizontal portion 321 and the vertical portion 322 are respectively used to abut against the edge of the product. In other words, the backing mold 320 is an L-shaped structure. When the backing mold 320 is installed on the upper surface of the cylinder housing 312, the inner side surface of the horizontal portion 321 and the inner side surface of the vertical portion 322 of the backing mold 320 abut against the two side surfaces of the product respectively, so as to realize the positioning and correction of the product. In addition, in the present embodiment, a plurality of notches 323 are respectively provided on the inner side surface of the transverse portion 321 of the backing mold 320 and the inner side surface of the vertical portion 322 of the backing mold 320. In other words, the inner side surface of the transverse portion 321 of the backing mold 320 and the inner side surface of the vertical portion 322 of the backing mold 320 are respectively tooth-like structures. In this way, while achieving product positioning, the amount of material used in the processing of the backing mold 320 and the weight of the backing mold 320 are reduced, which is beneficial to reducing the processing cost of the backing mold 320 and the difficulty of moving the backing mold 320.

[0030] In one embodiment, the cylinder body of the slide cylinder 310 is fixed on the side wall of the connecting base 100, that is, the slide cylinder 310 and the connecting base 100 are connected together to obtain the CNC fixture of this embodiment. Figure 1 and Figure 4 In another embodiment, the CNC fixture also includes a base 400, which is provided with a first mounting groove 410 and a second mounting groove 420 located next to the first mounting groove 410, the connecting base 100 is embedded in the first mounting groove 410 and fixedly connected to the base 400, and the cylinder body of the slide cylinder 310 is embedded in the second mounting groove 420 and fixedly connected to the base 400. In this embodiment, the connection base 100 is fixedly connected to the base 400 by penetrating the first installation groove 410 from the bottom of the base 400 and inserting the bolts of the connection base 100. The inner contour of the first installation groove 410 is adapted to the annular side contour of the connection base 100 to reduce the shaking of the connection base 100 in the first installation groove 410. The side wall of the first installation groove 410 is also provided with an air guide notch 411, which is convenient for the connection base 100 to be placed in the first installation groove 410. The air between the bottom of the connection base 100 and the first installation groove 410 is discharged, thereby reducing the difficulty of placing the connection base 100 in the first installation groove 410. In addition, the second installation groove 420 also accommodates a cylinder bottom plate, which is screwed to the inner wall of the second installation groove 420, and the cylinder body 311 of the slide cylinder 310 is fixed on the cylinder bottom plate.

[0031] Furthermore, two or more first mounting grooves 410 are arranged at intervals on the base 400, and a second mounting groove 420 is arranged correspondingly on the side of each first mounting groove 410. Accordingly, a connecting base 100 is fixed in each first mounting groove 410, a product base 200 is fixed on the top of the connecting base 100, and a slide cylinder 310 is fixed in each second mounting groove 420. In this way, multiple tools can be used to simultaneously perform precision carving operations on products on multiple product bases 200, thereby improving product processing efficiency.

[0032] In order to support the bottom of the product while ensuring that the bottom of the product has a sufficiently large adsorption force, in one embodiment, the number of support blocks 240 is one, and the upper surface of the support block 240 is provided with a plurality of grooves that are crisscrossed and connected to the third air hole 230, and each groove evenly divides the upper surface of the support block 240. In another embodiment, the number of support blocks 240 is greater than or equal to two, and each support block 240 is distributed in the adsorption groove 220 at intervals, and an air guide groove that is connected to the third air hole 230 is formed between adjacent support blocks 240, and each support block 240 is evenly distributed in the adsorption groove 220. By providing the grooves or air guide grooves, a flow channel for gas in the adsorption groove 220 and a contact area between the negative pressure and the bottom of the product are provided, while supporting the bottom of the product and ensuring that the force on the bottom of the product is uniform, the negative pressure contact area of ​​the bottom of the product is increased, thereby improving the stability of the product adsorption positioning.

[0033] Please combine Figure 1 and Figure 5 In one embodiment, the adjusting pin 330 is provided with an external thread, the cylinder housing 312 is provided with a threaded hole connected to the L-shaped notch 315, the adjusting pin 330 is penetrated by the threaded hole and threadedly matched with the threaded hole, a slot is provided on the side of the backing mold 320, a limiting ring is fixed to the notch edge of the slot, the inner diameter of the limiting ring is smaller than the diameter of the slot, an annular groove is provided on the adjusting pin 330 near its end, the end of the adjusting pin 330 is inserted into the slot, and the edge of the center hole of the limiting ring is embedded in the annular groove and limitedly matched with the inner surface of the annular groove. In this way, while limiting the adjusting pin 330 and the backing mold 320 along the axis direction of the adjusting pin 330, the adjusting pin 330 can be rotated relative to the backing mold 320. When the position of the backing mold 320 is adjusted, the length of the end of the adjusting pin 330 extending into the L-shaped notch 315 can be adjusted by rotating the adjusting pin 330, thereby driving the backing mold 320 to approach or move away from the product base 200, and adjusting the position of the backing mold 320 to adapt to the processing of products of different sizes.

[0034] Furthermore, in one embodiment, at least one guide through hole 324 is provided on the support mold 320, and the guide through hole 324 extends along the width direction of the product base 200. A limit pin 325 is provided in the L-shaped notch 315, which penetrates the guide through hole 324 and is fixedly connected to the upper surface of the cylinder housing 312. By providing the limit pin 325 on the upper surface of the cylinder housing 312 and providing the guide through hole 324 on the support mold 320, the limit of the sliding path of the support mold 320 on the upper surface of the cylinder housing 312 can be achieved through the limit cooperation between the limit pin 325 and the guide through hole 324, so as to avoid the misalignment problem between the support mold 320 and the product base 200 caused by the shaking of the support mold 320 during the position adjustment process, thereby improving the reliability of the position adjustment of the support mold 320 and the accuracy of product positioning.

[0035] The above-mentioned CNC fixture limits the processing station of the product by setting a lifting and horizontally adjustable supporting mold 320 on the side of the product base 200; by opening an air hole in the middle of the product base 200 as an exhaust channel, the bottom of the product is evenly stressed, and the support block 240 in the adsorption groove 220 supports the lower surface of the product. While ensuring that the product is evenly stressed, it can prevent the product from being damaged by excessive force from the tool during the fine carving process. It replaces the edge exhaust structure design of the original contour base suction fixture, which can avoid the problem of insufficient consistency in product edge processing caused by product edge shaking, improves the stability of product positioning, and can improve the yield rate of product fine carving operations.

[0036] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0037] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A CNC fixture for white sheet processing of smart devices, characterized in that: include: A connecting base, wherein a first air hole for connecting to an external air pressure device is provided on a side of the connecting base, a second air hole is provided in the middle of an upper surface of the connecting base, and a first air passage connecting the first air hole and the second air hole is provided inside the connecting base; A product base, the product base is located above the connecting base and is fixedly connected to the upper surface of the connecting base, an adsorption groove is provided on the upper surface of the product base, the edge of the groove of the adsorption groove forms an adsorption working surface, a second air channel is provided in the product base, the second air channel runs through the upper surface of the product base and forms a third air hole in the middle of the groove bottom of the adsorption groove, the second air channel runs through the lower surface of the product base and forms a fourth air hole connected to the second air hole; a support block is provided in the adsorption groove, and the upper surface of the support block is flush with the edge of the groove of the adsorption groove; as well as A positioning assembly, the positioning assembly includes a slide cylinder, a backing mold and an adjusting pin arranged on the side of the connecting base, the slide cylinder includes a cylinder body for communicating with an external air pressure device, a piston slidably inserted into the inner cavity of the cylinder body and sealedly connected to the inner cavity of the cylinder body, a piston rod fixed on the piston and extended from the cylinder body, a cylinder shell fixed at the end of the piston rod and slidably matched with the outer surface of the cylinder body, and a position detection switch installed on the cylinder body and used for electrically connecting to the controller of the CNC machine; an L-shaped notch is provided on the upper surface of the cylinder shell, the backing mold is accommodated in the L-shaped notch, the adjusting pin passes through the side wall of the L-shaped notch and cooperates with the backing mold limit, the backing mold is driven by the adjusting pin to approach or move away from the product base, the upper surface of the backing mold is higher than the upper surface of the product base, and the backing mold forms a product limit area on the side of the product base.

2. The CNC fixture according to claim 1, characterized in that: The cylinder body of the slide cylinder is fixed on the side wall of the connection base.

3. The CNC fixture according to claim 1, characterized in that: The CNC fixture also includes a base, which is provided with a first mounting groove and a second mounting groove located next to the first mounting groove, the connecting base is embedded in the first mounting groove and fixedly connected to the base, and the cylinder body of the slide cylinder is embedded in the second mounting groove and fixedly connected to the base.

4. The CNC fixture according to claim 2 or 3, characterized in that: The number of the support block is one, and a plurality of grooves which are crisscrossed and communicated with the third air holes are formed on the upper surface of the support block.

5. The CNC fixture according to claim 2 or 3, characterized in that: The number of the support blocks is greater than or equal to two, the support blocks are distributed in the adsorption groove at intervals, and an air guide groove communicating with the third air hole is formed between adjacent support blocks.

6. The CNC fixture according to claim 1, characterized in that: The support mold includes a horizontal portion and a vertical portion vertically connected to the end of the horizontal portion, the horizontal portion extends along the length direction of the product base, and the vertical portion extends along the width direction of the product base. The horizontal portion and the vertical portion are respectively used to abut against the edge of the product.

7. The CNC fixture according to claim 6, characterized in that: The inner side surface of the horizontal part of the supporting mold and the inner side surface of the vertical part of the supporting mold are respectively provided with a plurality of notches.

8. The CNC fixture according to claim 1, characterized in that: The adjusting pin is provided with an external thread, and a threaded hole connected to the L-shaped notch is provided on the cylinder housing. The adjusting pin passes through the threaded hole and is threadedly matched with the threaded hole. A slot is provided on the side of the mold, and a limiting ring is fixed to the edge of the slot. The inner diameter of the limiting ring is smaller than the diameter of the slot. An annular groove is provided on the adjusting pin near its end, and the end of the adjusting pin is inserted into the slot, and the edge of the center hole of the limiting ring is embedded in the annular groove and is limitedly matched with the inner surface of the annular groove.

9. The CNC fixture according to claim 1, characterized in that: At least one guide through hole is formed on the base, and the guide through hole extends along the width direction of the product base. A limit pin is provided in the L-shaped notch, which passes through the guide through hole and is fixedly connected to the upper surface of the cylinder housing.

10. The CNC fixture according to claim 1, characterized in that: A sealing ring is provided at the communicating portion between the second air hole and the fourth air hole.

Images