Adjustable reverse scribing auxiliary positioning device and method

Abstract

The invention discloses an adjustable reverse marking auxiliary positioning device and method.The adjustable reverse marking auxiliary positioning device comprises a locking mechanism fixedly connected with a drilling machine spindle and a supporting piece with the adjustable length, the locking mechanism and the supporting piece are detachably connected, and assembling after adjustment and disassembling after machining are facilitated; when parts are machined, the locking mechanism is fixedly connected with a main shaft of a drilling machine; the length of the supporting piece is adjusted, and the supporting piece is placed on the locking mechanism; the drilling machine spindle is started, and when the adjustable positioning block abuts against the drilling machine base, the drilling machine spindle is limited to continuously move upwards, so that the reverse scribing depth of the drilling machine spindle is controlled, and the machining precision is guaranteed. By the adoption of the positioning device, the reverse scribing machining precision can be effectively controlled well, the requirement for the machining precision of parts can be met only through one-time machining, and the machining efficiency and the product percent of pass are improved; the device is simple in structure and principle and convenient to manufacture and use, and has good application and popularization value.

Description

Technical Field

[0001] The invention belongs to the field of shell parts processing, and in particular relates to an adjustable reverse scratching auxiliary positioning device and method. Background Art

[0002] In order to ensure the installation quality, the connection parts of shell parts are usually designed with a counter-scratched structure at the connection holes. There are currently two commonly used methods for processing the counter-scratched structure. One is that the fitter uses a counter-scratching cutter on a drilling machine, and the other is to use a special electrode on an EDM machine. Due to the use of special electrodes, different sizes of electrodes need to be made for different parts. The electrodes are universal and wear quickly, and the processing cost is high. Therefore. In general, the counter-scratching cutter is used on a drilling machine. However, the counter-scratching cutter on a drilling machine still has the following shortcomings: First, due to the large gap and low precision of the drilling machine dial, the parts cannot be processed in place at one time according to the dial value, and repeated processing and measurement are required, resulting in low processing efficiency; second, due to repeated tool setting, after the allowance is less than 0.05mm, due to the wear of the tool head and the cold work hardening phenomenon on the surface of the parts, the tool setting and cutting again are likely to cause the parts to be out of tolerance, resulting in a low pass rate.

[0003] In order to solve the above problems, currently, the displacement control on the drilling machine spindle is completed by cooperating the machine tool dial and the limit block. Although this method improves the processing accuracy, it has certain limitations. The reason is that in actual use, since the backscratching is a working method of the spindle from bottom to top, and the tool bar must be left with room for clamping, the stroke of the limit block is greatly shortened, resulting in a very small processing range, and the gap of the machine tool is large. The tolerance of the parts processed by such a denting device can only be guaranteed to be 0.5mm, and the parts need to be processed again to meet the accuracy requirements. In addition, in actual use, it is necessary to perform backscratching processing on parts of various specifications. The current auxiliary tooling needs to be adjusted according to parts of different specifications to meet the processing requirements, and the versatility is poor.

[0004] It can be seen that the existing reverse scratching auxiliary tooling cannot guarantee that the machining accuracy requirements of the parts can be met with only one processing. Summary of the invention

[0005] In order to overcome the above technical defects, the present invention provides an adjustable reverse-scratching auxiliary positioning device and method, which can solve the technical problem that the existing reverse-scratching auxiliary tooling cannot ensure that the processing accuracy requirements of parts can be met with only one processing.

[0006] In order to achieve the above object, the present invention adopts the following technical contents: An adjustable reverse stroke auxiliary positioning device, comprising a locking mechanism; The locking mechanism is connected and fixed to the main shaft of the drilling machine; The locking mechanism is provided with a support member with adjustable length; One end of the support member is detachably connected to the locking mechanism, and the other end can abut against the drilling machine base during part processing; The locking mechanism cooperates with the supporting member to control the back-scratching depth of the drilling machine spindle in the vertical direction.

[0007] Furthermore, the locking mechanism adopts a limit seat; the limit seat adopts an openable and closable structure, the limit seat sleeve is arranged on the main shaft of the drilling machine, and is locked and fixed by a locking screw; a boss structure is arranged on the circumference of the limit seat, which cooperates with the bottom of the support member.

[0008] Furthermore, the support member includes two symmetrically arranged adjustable positioning blocks; the adjustable positioning block includes a connecting member and an adjusting screw, and the connecting member and the adjusting screw are connected by threads; a positioning hole is opened at the bottom of the connecting member, and when processing parts, the boss structure is inserted into the positioning hole.

[0009] Furthermore, a fastening nut is sleeved on the connection between the adjusting screw and the connecting piece.

[0010] Furthermore, the adjusting screw adopts a screw with a specification of M14×0.5 fine pitch thread.

[0011] Furthermore, the end surface of the adjusting screw abutting against the drilling machine base is a smooth surface.

[0012] Furthermore, the connecting piece adopts a cylindrical structure, and a hexagonal groove is opened on the outer wall of the cylindrical structure along the circumferential direction.

[0013] Furthermore, the adjustable positioning block is made of stainless steel.

[0014] A method for using the adjustable reverse scratch auxiliary positioning device includes: Fix the parts to be processed on the workbench of the drilling machine; Connect and fix the locking mechanism to the drilling machine spindle; Adjust the length of the support member and place the support member on the locking mechanism; Start the drilling machine spindle, and when the adjustable positioning block hits the drilling machine base, the reverse scratching depth of the drilling machine spindle is controlled.

[0015] Further, including: Fix the parts to be processed on the workbench of the drilling machine; Fix the limit seat on the lower end of the drilling machine spindle and lock it with the locking screw; According to the height of the part, the depth of the back-scratching groove, the length of the back-scratching knife, and the installation position of the limit seat, the installation height of the adjustable positioning block is calculated, and the length of the adjustable positioning block is adjusted according to the installation height, and after adjustment, it is placed on the boss of the limit seat; Turn on the drill press switch to rotate the drill press spindle, and at the same time operate the drill press spindle height for back-scratching. When the adjustable positioning block hits the drill press base, the back-scratching depth is qualified.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides an adjustable back-scratching auxiliary positioning device, which comprises a locking mechanism connected and fixed to a drilling machine spindle, and a support member with adjustable length. The locking mechanism and the support member are connected in a detachable manner, so that the length of the support member can be conveniently adjusted according to parts of different specifications, and the assembly after adjustment and the disassembly after processing are convenient. When processing parts, the locking mechanism is connected and fixed to the drilling machine spindle; the length of the support member is adjusted, and the support member is placed on the locking mechanism; the drilling machine spindle is started, and when the adjustable positioning block hits the drilling machine base, the drilling machine spindle is limited from continuing to move upward, thereby controlling the back-scratching depth of the drilling machine spindle and ensuring the processing accuracy. The positioning device can effectively control the back-scratching processing accuracy, and only one processing is required to meet the processing accuracy requirements of the parts, thereby improving the processing efficiency and the product qualification rate. The device has a simple structure and principle, is easy to manufacture and use, and has good promotion and application value.

[0017] Preferably, in the present invention, the locking mechanism adopts an openable and closable limit seat. The openable and closable setting facilitates assembly with the drilling machine spindle, and the fastening between the two is achieved through the cooperation of the locking screw, thereby ensuring the reliability of the connection during the processing; at the same time, a boss structure is provided on the circumference of the limit seat, which can cooperate with the bottom of the support member, thereby achieving a good positioning effect and improving assembly efficiency.

[0018] Further preferably, in the present invention, the support member adopts two symmetrically arranged adjustable positioning blocks, and the adjustable positioning block includes two parts, a connecting member connected to the limit seat, and an adjusting screw that cooperates with the connecting member to achieve length adjustment, so as to facilitate cooperation with the boss structure of the limit seat, and a positioning hole is opened at the bottom of the connecting member to facilitate positioning between the two.

[0019] Further preferably, in the present invention, in order to ensure the stability of the adjustable length of the support member and prevent it from shifting, a fastening nut is installed at the connection between the adjusting screw and the connecting member. In this way, during the reverse scoring process, the adjusted length of the support member is ensured, the support member is prevented from shifting, and the processing accuracy is ensured.

[0020] Further preferably, in the present invention, the connecting piece adopts a cylindrical structure, and a hexagonal groove is opened on the outer wall of the cylindrical structure along the circumferential direction. In order to adjust the length of the adjustable positioning block, an adjustment tool is required. The design of the hexagonal groove is convenient for cooperation with the adjustment tool to achieve the adjustment of its length so as to meet the requirements of processing accuracy.

[0021] More preferably, in the present invention, the adjusting screw adopts a screw with a specification of M14×0.5 fine pitch thread. The screw with M14×0.5 fine pitch thread, on the one hand, adopts a fine pitch thread to make fine adjustments to the length, thereby ensuring the requirement of processing accuracy. On the other hand, adopting a screw with a larger end face increases the abutment area with the top drilling machine base, thereby ensuring the positioning effect and thus ensuring the processing accuracy.

[0022] More preferably, in the present invention, the end surface of the adjusting screw abutting against the drilling machine base adopts a smooth surface, so that the smooth surface can ensure reliable contact with the drilling machine base, further ensuring the processing accuracy.

[0023] More preferably, in the present invention, the adjustable positioning block is made of stainless steel. On the one hand, during the processing, since the adjustable positioning block needs to repeatedly abut against the drilling machine base, the use of stainless steel ensures that the adjustable positioning block has a certain strength and improves the service life of the device. On the other hand, in the actual use environment, a completely dry environment cannot be ensured, and stainless steel can improve corrosion resistance and ensure processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the anti-scratch dimple structure provided by an embodiment of the present invention; wherein (a) is a schematic diagram of the anti-scratch dimple of a part; (b) is a cross-sectional view of AA in (a); Figure 2 A schematic structural diagram of an adjustable reverse scratching auxiliary positioning device provided in an embodiment of the present invention; Figure 3 A schematic diagram of a limit seat structure of an adjustable reverse scratching auxiliary positioning device provided in an embodiment of the present invention, wherein (a) is a side view and (b) is a top view; Figure 4 An assembly component diagram of a limit seat of an adjustable reverse scratch auxiliary positioning device provided in an embodiment of the present invention, wherein (a) is a block structure diagram; (b) is a schematic diagram of a locking screw; (c) is a schematic diagram of a screw hole of the limit seat; Figure 5 A schematic structural diagram of an adjustable positioning block of an adjustable reverse scratching auxiliary positioning device provided in an embodiment of the present invention; Figure 6 Another structural schematic diagram of an adjustable positioning block of an adjustable reverse scratching auxiliary positioning device provided in an embodiment of the present invention; Figure 7 A schematic diagram of a connector of an adjustable positioning block provided in an embodiment of the present invention; wherein (a) is a side sectional view; (b) is a sectional view taken along the AA line in (a); Figure 8 A schematic diagram of an adjusting screw of an adjustable positioning block provided in an embodiment of the present invention; Fig. 9 A schematic diagram of a fastening nut of an adjustable positioning block provided in an embodiment of the present invention; Fig.10 A schematic diagram of calculating the height of an adjustable positioning block during assembly of an adjustable reverse scratch auxiliary positioning device provided by an embodiment of the present invention; Fig.11 A schematic diagram of assembling an adjustable positioning block provided in an embodiment of the present invention.

[0025] Reference numerals: 1. Drilling machine spindle; 2. Limit seat; 3. Adjustable positioning block; 4. Counter-scratching knife; 5. Adjusting screw; 6. Connecting piece; 7. Locking screw; 8. Fastening nut; 9. Drilling machine base; 10. Counter-scratching knife; 11. Spacer; 12. Parts. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail in the following specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings: Example In combination with the background technology mentioned above, in order to ensure the installation quality, the connection holes of the shell parts are usually designed with a reverse groove structure, such as Figure 1 As shown, see Figure 1 (a) and Figure 1 (b) There are generally two methods for processing the reverse dimple structure: 1) On the drilling machine, the fitter uses the reverse scratching tool head for processing, which has the following problems: a. Low efficiency: Due to the large gap between the drilling machine dials and low precision, the parts cannot be processed in place at one time according to the dial values. Repeated processing and measurement are required, resulting in low processing efficiency.

[0034] b. Low pass rate: The thickness tolerance of the current part is generally required to be 0.1mm. The clearance of ordinary drilling machines is large. The spindle works from bottom to top during reverse drilling, and the dimensional tolerance is difficult to guarantee. In addition, due to repeated tool setting, when the allowance is less than 0.05mm, due to reasons such as tool head wear and cold work hardening on the surface of the part, the second tool setting and cutting is likely to cause the part to be out of tolerance, resulting in a low pass rate.

[0035] 2) When using special electrodes on EDM machines, the following problems exist: a. Special electrodes are not universal. Different sizes of electrodes need to be processed for different parts. The electrodes wear quickly and the processing cost is high. b. EDM efficiency is low.

[0036] c. Electrospark machining will produce oxide scale, and manual removal is inefficient.

[0037] By comparison, reverse scratching is generally used on a drilling machine, but due to the low precision of the machine tool dial, repeated tool adjustment results in low efficiency and low pass rate.

[0038] However, when using the reverse scoring tool on the drilling machine, the displacement control on the drilling machine spindle is generally completed by cooperating with the machine tool dial and the limit block. Although this method improves the processing accuracy, it has certain limitations. The reason is that in actual use, since reverse scoring is a working method of the spindle from bottom to top, and there must be room for clamping the tool bar, the stroke of the limit block is greatly shortened, resulting in a very small processing range, and the gap of the machine tool is large. The tolerance of the parts processed by such a scoring device can only be guaranteed to be 0.5mm, and the parts need to be processed again to meet the accuracy requirements. In addition, in actual use, it is necessary to reverse score a variety of parts of different specifications. The current auxiliary tooling needs to be adjusted according to the parts of different specifications to meet the processing requirements, and the versatility is poor.

[0039] In order to achieve the above-mentioned purpose, the present embodiment provides an adjustable back-scratching auxiliary positioning device and method, which can accurately limit the displacement of the drilling machine spindle and accurately adjust the back-scratching depth through the cooperation of the locking mechanism and the support member, thereby meeting the requirements of the back-scratching processing accuracy.

[0040] The specific structure of this embodiment is described in detail below in conjunction with the accompanying drawings: like Figure 2 As shown, this embodiment provides an adjustable reverse scratch auxiliary positioning device, comprising: The locking mechanism connected to the lower end of the drilling machine spindle 1 has a length-adjustable support member on the locking mechanism. One end of the support member is detachably connected to the locking mechanism, and the other end can abut against the drilling machine base 9 when processing parts.

[0041] The working principle of this embodiment is as follows: the locking mechanism cooperates with the support member, and when the drilling machine spindle 1 is reversely scratched upward, the reverse scratching depth of the drilling machine spindle 1 in the vertical direction can be controlled.

[0042] Specifically, Figure 3 As shown, here, the locking mechanism adopts a limit seat 2, see Figure 3(a) and (b), the limit seat 2 adopts an openable and closable structure, which is convenient for assembly with the drilling machine spindle 1. Through the cooperation of the locking screw 7, the fastening between the two is achieved, ensuring the reliability of the connection during the processing; at the same time, a boss structure is arranged on the circumference of the limit seat 2, which can cooperate with the bottom of the support member, achieving a good positioning effect and improving the assembly efficiency.

[0043] like Figure 4 As shown, in order to achieve better stability, a pad 11 is further provided on the locking screw 7, so that the locking effect is more stable and reliable.

[0044] When in use, the limit seat 2 is opened and buckled onto the lower end of the drilling machine spindle 1, and the limit seat 2 is locked by passing the locking screw 7 through the pad 11, so that the limit seat 2 and the drilling machine spindle 1 are assembled.

[0045] like Figure 5 As shown, the adjustable positioning block 3 is mainly composed of two parts, including an adjusting screw 5 and a connecting piece 6. The top of the connecting piece 6 is connected to the adjusting screw 5 by a threaded manner, which can realize the adjustment of the length (height) and is convenient for matching with the boss structure of the limit seat 2. A positioning hole is opened at the bottom of the connecting piece 6 to facilitate quick and effective positioning between the two.

[0046] When in use, the processing size is ensured by adjusting the height of the adjusting screw 5. After the processing is completed, the adjustable positioning block 3 device is removed to easily disassemble and assemble the part 12. At the same time, the Z-axis travel record is retained.

[0047] The adjusting screw 5 here adopts M8×1.25 coarse thread. When using this positioning device, when processing the first part 12, it is necessary to continuously debug. After processing a qualified product, determine the height of the adjusting screw and then process other parts.

[0048] Since the end face area of ​​the adjusting screw 5 is small, it is easy to cause deflection during positioning. Without a locking structure, the screw may be automatically pushed away after multiple collisions, causing Z-direction displacement deviation, resulting in reduced accuracy and difficulty in meeting the processing requirements of parts.

[0049] In order to solve the above problems, in this embodiment, the adjustable positioning block 3 is further improved, such as Figure 6 , Figure 7 and Figure 8 As shown, another structure is provided, which specifically adopts: a fastening nut 8 is installed at the connection between the adjusting screw 5 and the connecting member 6, such as Fig. 9As shown, in this way, during the reverse scratching process, the adjusted length of the adjustable positioning block 3 is guaranteed, preventing the screw from being easily pushed automatically after multiple collisions, causing Z-direction displacement deviation, and ensuring the processing accuracy. In addition, the adjusting screw adopts a screw with a specification of M14×0.5 fine pitch thread. The screw with M14×0.5 fine pitch thread increases the area of ​​the contact end face. On the one hand, the use of fine pitch thread can finely adjust the length to ensure the processing accuracy requirements. On the other hand, the use of a screw with a larger end face increases the contact area with the top drilling machine base, ensuring the positioning effect, thereby ensuring the processing accuracy.

[0050] In addition, in this embodiment, the end surface of the adjusting screw 5 that abuts against the drilling machine base 9 is a smooth surface, so that the smooth surface can ensure reliable and sufficient contact with the drilling machine base, further ensuring the processing accuracy.

[0051] In addition, in this embodiment, the connecting member 6 adopts a cylindrical structure, and a hexagonal groove is opened on the outer wall of the cylindrical structure along the circumferential direction. In order to adjust the length of the adjustable positioning block 3, an adjustment tool is required. The design of the hexagonal groove is convenient for cooperation with the adjustment tool to achieve the adjustment of its length so as to meet the processing accuracy requirements.

[0052] It should be noted that before assembling the adjustable positioning block 3 with the limit seat 2, the length of the adjustable positioning block 3 that needs to be adjusted is obtained by calculation. In order to ensure that the heights of the two adjustable positioning blocks 3 are consistent, the Swiss TRIMOS V9-400 / 700 / 1100 two-dimensional digital display height gauge can be used to accurately measure the adjustable positioning block 3. On the one hand, the height consistency of the adjustable positioning block 3 is ensured, ensuring the accuracy of the reverse scratching processing; on the other hand, it is convenient to fine-tune the height, and similarly, the final reverse scratching processing accuracy is ensured.

[0053] Furthermore, in the present embodiment, the adjustable positioning block 3 is made of stainless steel. On the one hand, during the processing, since the adjustable positioning block needs to repeatedly abut against the drilling machine base, the use of stainless steel ensures that the adjustable positioning block has a certain strength and improves the service life of the device; on the other hand, in the actual use environment, a completely dry environment cannot be ensured, and stainless steel can improve corrosion resistance and ensure processing accuracy.

[0054] This embodiment provides an adjustable reverse scratch auxiliary positioning device, and the specific use method is as follows: Fix the parts to be processed on the workbench of the drilling machine; Connect and fix the locking mechanism to the drilling machine spindle 1; Adjust the length of the support member and place the support member on the locking mechanism; The drilling machine spindle 1 is started, and when the adjustable positioning block 3 hits the drilling machine base 9, the back-scratching depth of the drilling machine spindle 1 is controlled.

[0055] Combination Fig.10 As shown, the more specific steps are as follows: (1) Place part 12 on a common drilling machine workbench and fix it using a combination clamp.

[0056] (2) Fix the limit seat 2 to the lower end of the drilling machine spindle 1 and lock it with the locking screw 7.

[0057] (3) Install the tool bar of the back-scratching tool 10 on the drilling machine so that the tool bar passes through the hole of the part 12 to be back-scratched, and install the back-scratching tool head.

[0058] (4) Calculate the height of the adjustable positioning block according to the part height, back-scratching groove depth, back-scratching knife length, and the installation position of the limit seat. Adjust the two adjustable positioning blocks 3 and place them on the boss of the limit seat 2.

[0059] Here, if Fig.10 As shown, calculate the height L of the adjustable positioning block 3; the specific calculation formula is: Here, take the reverse scratching of a part as an example: L=H-L1-L2-L3-L4-(H1-H2)=590-30-33-224-50-(180-9)=82mm. Among them: H is the total height of the top of the drilling machine from the worktable, L1 is the thickness of the limit seat, L2 is the position dimension of the lower end face of the limit seat from the lower end face of the main spindle, L3 is the position dimension of the lower end face of the main spindle from the lower end face of the tool handle, L4 is the tool extension length-tool head thickness, H1 is the total height of the part shell, and H2 is the final thickness dimension of the groove.

[0060] Preferably, in order to facilitate the calculation of the height L of the adjustable positioning block 3 and improve the calculation efficiency and the subsequent reverse processing efficiency, it is possible to adopt Fig.11 The assembly method shown in the figure, the structure of the limit seat 2 is adjusted at the same time, and a step structure is set on the bottom inner wall to match the drilling machine spindle 1. The specific calculation is: L=H-(L1-L2)-L3-L4-(H1-H2)=590-(30-5)-224-50-(180-9)=120mm.

[0061] Among them: H is the total height of the top of the drilling machine from the workbench, L1 is the thickness of the limit seat, L2 is the size of the lower end face of the limit seat from the lower end face of the large spindle, L3 is the position size of the lower end face of the large spindle from the lower end face of the tool handle, L4 is the tool extension length - tool head thickness, H1 is the total height of the part shell, and H2 is the final thickness size of the groove.

[0062] In this assembly method, when installing the limit seat 2, it can be directly stopped on the end face of the main spindle of the machine tool, and L1-L2=25mm is a fixed value, which is convenient for measuring and calculating the height of the adjustable positioning block 3.

[0063] (5) Turn on the drill press switch to rotate the drill spindle 1. Use the drill handle to adjust the height of the drill spindle 1 and perform back-scratching. When the adjustable positioning block 3 reaches the top of the drill press, i.e., the drill press base 9, the back-scratching depth is qualified, and the tolerance of the parts processed in this way can be guaranteed to be within the range of 0.1 mm.

[0064] (6) Use the drill press handle to lower the height of the drill press spindle 1, remove the adjustable positioning block 3, remove the cutter head of the back-scratching cutter 4, raise the drill press spindle 1, lift out the tool rod of the back-scratching cutter 4, remove part 12, replace the next part 12, and process the next part according to the above process.

[0065] After the first part is processed using the device, since the height of the adjustable positioning block 3 has been retained, the subsequent parts can be processed to size at one time without leaving allowance for repeated processing, which improves the processing efficiency and ensures the part qualification rate.

[0066] For multiple processing parts on a processing surface of the same part, multiple adjustable positioning devices can be used for processing. All reverse-scratching parts can be processed in one positioning, which reduces the repeated clamping and alignment of parts and greatly improves the processing efficiency.

[0067] Furthermore, since the adjustable reverse scratch auxiliary positioning device has an adjustment function, it can also meet the processing requirements of parts of different specifications. It is only necessary to recalculate the installation height according to step (4) and complete the assembly according to the calculated installation height.

[0068] The present embodiment provides an adjustable back-scratching auxiliary positioning device and a method of use. By using different adjustable positioning blocks, the drilling machine can efficiently process back-scratching dimples, solve the back-scratching dimple processing of 90% of shell parts, improve processing efficiency and qualified rate, use ordinary drilling machine equipment for processing, and reduce production costs; the qualified rate of parts reaches more than 98%, saving 70% of operation time.

[0069] In summary, this embodiment provides an adjustable reverse scratching auxiliary positioning device and method. Compared with the existing processing auxiliary device, this device has the following advantages: The adjustable back-scratching auxiliary positioning device comprises a locking mechanism connected and fixed to the drilling machine spindle, and a support member with adjustable length. The locking mechanism and the support member are connected in a detachable manner, so that the length of the support member can be conveniently adjusted according to parts of different specifications, and it is convenient to assemble after adjustment and disassemble after processing; when processing parts, the locking mechanism is connected and fixed to the drilling machine spindle; the length of the support member is adjusted, and the support member is placed on the locking mechanism; the drilling machine spindle is started, and when the adjustable positioning block hits the drilling machine base, the drilling machine spindle is restricted from further upward displacement, thereby controlling the back-scratching depth of the drilling machine spindle and ensuring the processing accuracy; the positioning device can effectively control the back-scratching processing accuracy, and only one processing is required to meet the processing accuracy requirements of the parts, thereby improving the processing efficiency and product qualification rate; the device has a simple structure and principle, is easy to manufacture and use, and has good promotion and application value.

[0070] The above embodiment is only one of the implementation methods that can realize the technical solution of the present invention. The scope of protection claimed by the present invention is not limited only to this embodiment, but also includes changes, replacements and other implementation methods that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention.

Claims

1. An adjustable reverse scratch auxiliary positioning device, characterized in that: including a locking mechanism; The locking mechanism is connected and fixed to the drilling machine spindle (1); The locking mechanism is provided with a support member with adjustable length; One end of the support member is detachably connected to the locking mechanism, and the other end can abut against a drilling machine base (9) during part processing; The locking mechanism cooperates with the support member to control the back-scratching depth of the drilling machine spindle (1) in the vertical direction.

2. The adjustable reverse scratch auxiliary positioning device according to claim 1, characterized in that: The locking mechanism adopts a limit seat (2); the limit seat (2) adopts an openable and closable structure, the limit seat (2) is sleeved on the drilling machine spindle (1), and is locked and fixed by a locking screw (7); a boss structure is provided on the circumference of the limit seat (2) and cooperates with the bottom of the support member.

3. The adjustable reverse scratch auxiliary positioning device according to claim 2, characterized in that: The support member comprises two symmetrically arranged adjustable positioning blocks (3); the adjustable positioning block (3) comprises a connecting member and an adjusting screw, the connecting member and the adjusting screw being connected via a thread; a positioning hole is provided at the bottom of the connecting member, and when machining parts, the boss structure is inserted into the positioning hole.

4. The adjustable reverse scratch auxiliary positioning device according to claim 3, characterized in that: A fastening nut (8) is sleeved at the connection between the adjusting screw and the connecting piece.

5. The adjustable reverse scratch auxiliary positioning device according to claim 3, characterized in that: The adjusting screw adopts a screw with a specification of M14×0.5 fine pitch thread.

6. The adjustable reverse scratch auxiliary positioning device according to claim 3, characterized in that: The end surface of the adjusting screw abutting against the drilling machine base (9) is a smooth surface.

7. The adjustable reverse scratch auxiliary positioning device according to claim 3, characterized in that: The connecting piece adopts a cylindrical structure, and a hexagonal groove is opened on the outer wall of the cylindrical structure along the circumferential direction.

8. The adjustable reverse scratch auxiliary positioning device according to claim 3, characterized in that: The adjustable positioning block (3) is made of stainless steel.

9. A method for using the adjustable reverse scratch auxiliary positioning device according to any one of claims 1 to 8, characterized in that: include: Fix the parts to be processed on the workbench of the drilling machine; Connecting and fixing the locking mechanism to the drilling machine spindle (1); Adjust the length of the support member and place the support member on the locking mechanism; The drilling machine spindle (1) is started, and when the adjustable positioning block (3) hits the drilling machine base (9), the back-scratching depth of the drilling machine spindle (1) is controlled.

10. The method of use according to claim 9, characterized in that: include: Fix the parts to be processed on the workbench of the drilling machine; Fix the limit seat (2) to the lower end of the drilling machine spindle (1) and lock it with a locking screw (7); The installation height of the adjustable positioning block (3) is calculated according to the height of the part, the depth of the back-scratching groove, the length of the back-scratching knife, and the installation position of the limit seat (2), and the length of the adjustable positioning block (3) is adjusted according to the installation height, and after adjustment, it is placed on the boss of the limit seat (2); Turn on the drilling machine switch to rotate the drilling machine spindle (1), and at the same time operate the drilling machine spindle (1) to reversely scratch. When the adjustable positioning block (3) hits the drilling machine base (9), the reverse scratching depth is qualified.

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