CN112122428B - Device and method for finishing orifice of tiny part - Google Patents
Device and method for finishing orifice of tiny part Download PDFInfo
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- CN112122428B CN112122428B CN202010892584.3A CN202010892584A CN112122428B CN 112122428 B CN112122428 B CN 112122428B CN 202010892584 A CN202010892584 A CN 202010892584A CN 112122428 B CN112122428 B CN 112122428B
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- punching machine
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- machine tool
- orifice
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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Abstract
The invention belongs to the technical field of machining, and particularly relates to a device and a method for finishing an orifice of a micro part. In the processing process of the processing device, the device is installed on a punching machine tool and comprises a positioning base, a pressure rod, a limiting ruler, a limiting module, a fixing screw, a limiting snap ring, a dial indicator frame and a dial indicator, wherein a micro part to be processed is arranged in a flat bottom hole of the positioning base, and the main shaft of a punching machine tool drives the pressure rod to extrude a steel ball to finish a hole opening. During processing, the limiting device of the punching machine tool is used for rough positioning, accurate positioning of the stroke of the pressing rod is achieved through the dial indicator, and consistency of the orifice after finishing processing is guaranteed. The invention efficiently solves the problems of low efficiency and unstable quality in finishing the orifice of the micro part to be processed, is visual and accurate, has the processing qualified rate up to 100 percent and the consistency controlled within 0.01mm, and completely meets the pattern requirement.
Description
The technical field is as follows:
the invention belongs to the technical field of machining, and particularly relates to a device and a method for finishing an orifice of a micro part to be machined.
Background art:
the orifice finishing processing quality and consistency of the small end face hole (the diameter is less than 0.6mm) of the tiny part (the total length is less than 2.5mm, the maximum outer diameter is less than 3mm) are extremely high, the rounding depth of the orifice after finishing processing directly determines the sealing performance and the response time of the product, and the rounding depth of the orifice after finishing processing can meet the actual use requirement only within the range of 0.15 +/-0.01 mm.
The traditional processing method comprises the following steps: a punching head is arranged on a main shaft of a punching machine tool, the punching head extrudes a steel ball to perform finishing processing on an orifice of a small hole on the end surface of the tiny part, and an operator judges the motion stroke of the punching head by experience to control the rounding depth of the orifice. Because the small part size is little, difficult centre gripping and fixed in the processing, thereby the eccentric phenomenon of the orifice rounding appears finishing easily and causes the part to scrap. In addition, the consistency of the rounding depth of the orifice after finishing processing is poor only by the experience control of an operator, and is far greater than the requirement that the consistency is within 0.02mm, so that the performance requirement is difficult to meet.
Disclosure of Invention
Aiming at the defects of the traditional method, the invention adopts the device and the method for finishing the orifice of the micro part to be processed, so that the accuracy control of the consistency of the rounding depth of the orifice after finishing processing is realized, the consistency after processing is ensured to be within 0.01mm, and the index requirements are completely met.
In order to achieve the purpose, according to the first aspect of the invention, a device for finishing an orifice of a micro part to be processed is provided, in the processing process, the device is installed on a punching machine tool, a micro steel ball 10 is arranged at the center of the orifice of the micro part to be processed 9, the device comprises a positioning base 1, a pressure rod 2, a limiting ruler 3, a limiting module 4, a fixing screw 5, a limiting snap ring 6, a dial indicator frame 7 and a dial indicator 8, the punching machine tool is provided with a working platform, a working platform bracket fixed on the upper surface of the working platform, a main shaft of the punching machine tool positioned above the working platform and a main shaft box of the punching machine tool connected with the upper part of the main shaft of the punching machine tool, the lower part of the main shaft of the punching machine tool is provided with a chuck, and the joint of the main shaft of the punching machine tool and the main shaft box of the punching machine tool is provided with a large end surface;
the positioning base 1 is fixed on a working platform of a punching machine tool, a flat bottom hole is formed in the upper end face of the positioning base, the flat bottom hole is matched with the maximum outer diameter of the micro part 9 to be machined and used for placing and positioning the micro part 9 to be machined, and the hole of the micro part 9 to be machined is required to be coaxial with a main shaft of the punching machine tool after installation;
the pressing rod 2 is sequentially provided with three step excircles from top to bottom, which are respectively marked as a first step excircle, a second step excircle and a third step excircle, the first step excircle is connected with a main shaft chuck of the punching machine, and the upper end surface of the second step excircle is tightly attached to the lower end surface of the main shaft chuck of the punching machine to realize positioning; in the processing process, the fine steel ball 10 is punched on the lower end face of the excircle of the third step, and the finishing processing is carried out on the orifice of the fine part 9 to be processed;
the limiting ruler 3 is vertically fixed on the upper surface of the large end face of the main shaft of the punching machine and moves up and down along with the main shaft of the punching machine; the limiting module 4 is of a U-shaped structure, and the U-shaped part of the limiting module penetrates through the limiting ruler 3 and is fixed on the limiting ruler 3 through a fixing screw 5; the limiting snap ring 6 is of an annular structure, penetrates through the limiting ruler 3 and is fixed on the side wall of a main shaft box of the punching machine, the limiting snap ring 6 and the limiting module 4 are matched for relative movement, the movement limiting of the main shaft of the punching machine in the machining process is realized, and the phenomenon that the rounding depth of an orifice is too large due to unstable control in finishing machining is prevented;
the dial indicator 8 is fixed on the stamping machine tool working platform support through the dial indicator frame 7, and a measuring ball head of the dial indicator 8 is in contact with the lower surface of the large end face on the stamping machine tool spindle, so that the displacement of the machine tool spindle can be accurately controlled in the machining process, and the resolution error of the limiting ruler and the limiting error of the limiting module can be eliminated.
In a possible embodiment, the positioning base 1 is fixed on the working platform of the punching machine, and is positioned right below the main shaft of the punching machine.
In a possible embodiment, a flat-bottom rectangular groove is formed in the lower end surface of the positioning base 1, and the flat-bottom rectangular groove is arranged to reduce the contact area between the positioning base 1 and a working platform of a punching machine, so that the positioning accuracy of the positioning base 1 is improved.
In a possible embodiment, the diameter of the outer circle of the second step of the pressing rod 2 is greater than the diameter of the outer circle of the first step, and the upper end surface of the outer circle of the second step limits the leaping of the pressing rod 2 into the main shaft positioning sleeve when the pressing rod is subjected to the reaction force of the extruded steel ball, so that the machining consistency error caused by the axial leaping of the pressing rod 2 is prevented.
In a possible embodiment, the diameter of the outer circle of the third step of the pressure lever 2 is larger than the diameter of the small steel ball 10, so that when the small steel ball 10 is extruded on the lower end face of the outer circle of the third step, the small steel ball 10 is stressed in a balanced manner, and the steel ball is prevented from deviating or the orifice is prevented from being rounded and eccentric after being processed due to uneven stress.
In one possible embodiment, the outer diameter of the step at the third position of the pressure lever 2 is about 2-3 times of the diameter of the tiny steel ball 10.
In a possible embodiment, the limiting module 4 is made of elastic metal material, and can be deformed after being fastened by a fixing screw.
According to the second aspect of the invention, the processing method for finishing the orifice of the micro part to be processed is divided into two stages by using the device: the first stage is as follows: adjusting; and a second stage: and in the processing stage, the step of the adjusting stage is only needed to be carried out once, and the processing stage of repeating a plurality of parts can be entered.
In a possible embodiment, the adjusting phase specifically comprises the following steps:
s1: vertically fixing a limiting ruler 3 in the machining device on the upper surface of the large end surface of the machine tool spindle;
s2: a limiting snap ring 6 in the machining device penetrates through a limiting ruler 3, and the limiting snap ring 6 is fixed on the side wall of a main spindle box of a machine tool;
s3: fixing the dial indicator 8 on a working platform bracket of the punching machine through the dial indicator frame 7, and adjusting a measuring ball head of the dial indicator 8 to be in contact with the lower surface of the large end surface on the main shaft of the punching machine;
s4: the limiting module 4 penetrates through a limiting ruler 3 and is fixed on the limiting ruler 3 through a fixing screw 5;
s5: fixing the positioning base 1 on a working platform of a punching machine tool;
s6: the excircle of the first step of the pressure lever 2 is arranged in a chuck of a main shaft of a punching machine tool, and the upper end surface of the excircle of the second step is closely attached to the lower end surface of the chuck of the main shaft of the machine tool for positioning;
s7: adjusting the position of the positioning base 1 to enable a flat bottom hole of the positioning base 1 to be coaxial with the excircle of a step at the third position of the pressure rod 2;
s8: one end of the maximum outer diameter of the micro part 9 to be processed is downwards slide-fitted into the flat-bottom inner hole of the positioning base 1;
s9: placing a tiny steel ball 10 in the center of the orifice of a tiny part 9 to be processed;
s10: the main shaft of the machine tool is moved downwards until the lower end face of the excircle of the third step of the pressure lever 2 is contacted with the tiny steel ball 10, and the measuring ball head of the dial indicator 8 is adjusted to enable the pointer of the dial indicator 8 to indicate 0;
s11: taking out the tiny steel balls 10;
s12: the machine tool spindle continues to move downwards until the pointer of the dial indicator 8 points to the number 15, namely the machine tool spindle moves to 0.15mm, the fixing position of the limiting module 4 is adjusted to the position that the lower end face of the limiting module is tightly attached to the upper end face of the limiting clamp ring 6;
s13: returning the main shaft of the machine tool to a zero position;
s14: placing a tiny steel ball 10 in the center of the orifice of a tiny part 9 to be processed;
s15: the main shaft of the machine tool moves downwards, the lower end face of the excircle of the third step of the pressure lever 2 extrudes the tiny steel ball 10 until the lower end face of the limiting module 4 is tightly attached to the upper end face of the limiting snap ring 6, and the pointer pointing number 15 of the dial indicator 8 is observed;
s16: taking out the micro part 9 to be processed from the fixed base 1, and measuring the rounding depth of the processed orifice;
s17: if the position of the limiting module 4 on the limiting ruler 3 is qualified, the adjusting stage is finished, if the position of the limiting module 4 on the limiting ruler 3 is unqualified, the steps S12-S17 are repeated.
In a possible embodiment, said processing phase comprises in particular the following steps:
s1: after the adjustment stage is finished, entering a repeated processing stage of a plurality of parts, and downwards sliding and assembling one end of the maximum outer diameter of each micro part 9 to be processed into a flat-bottom inner hole of a positioning base 1 in the processing device;
s2: placing a tiny steel ball 10 in the center of the orifice of a tiny part 9 to be processed;
s3: the main shaft of the machine tool moves downwards, the lower end face of the excircle of the third step of the pressure lever 2 extrudes the tiny steel ball 10 until the lower end face of the limiting module 4 is tightly attached to the upper end face of the limiting snap ring 6, and the pointer pointing number 15 of the dial indicator 8 is observed;
s4: and taking out the tiny steel ball 10 and the tiny parts to be processed by using tweezers.
The invention has the beneficial effects that: the method can ensure that the finishing process of the orifice of the micro part to be processed is stable and controllable, and the depth and consistency of the sealing radius after finishing completely meet the requirements of technical indexes. Meanwhile, the design idea and the use method of the device can also be used in the finishing processing of other orifices of various types, and the device has general popularization.
Drawings
FIG. 1 is a schematic view of the apparatus of the present invention;
FIG. 2 is an enlarged view of the positioning base 1 and the pressing rod 2 of the present invention;
FIG. 3 is a cross-sectional view of the positioning base 1 and the pressing rod 2 according to the present invention;
FIG. 4 is a schematic structural diagram of a limiting module 4 according to the present invention;
FIG. 5 is a schematic view of the apparatus of the present invention in actual use;
fig. 6 is an enlarged view of a portion of the apparatus of the present invention.
Wherein: the method comprises the following steps of 1, a positioning base, 2, a pressure rod, 3, a limiting ruler, 4, a limiting module, 5, a fixing screw, 6, a limiting clamping ring, 7, a dial indicator frame, 8, a dial indicator, 9, a micro part to be processed and 10, a micro steel ball.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention, and the terms "first", "second", "third" are used for descriptive purposes only and are not intended to indicate or imply relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; there may be communication between the interiors of the two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1-6, a device for finishing an orifice of a micro part to be processed is mounted on a punching machine tool during processing, a micro steel ball 10 is arranged at the center of an orifice of a micro part 9 to be processed, the device comprises a positioning base 1, a pressure rod 2, a limiting ruler 3, a limiting module 4, a fixing screw 5, a limiting snap ring 6, a dial gauge frame 7 and a dial gauge 8, the punching machine tool is provided with a working platform, a working platform bracket fixed on the upper surface of the working platform, a main shaft of the punching machine tool positioned above the working platform and a main shaft box of the punching machine tool connected with the upper part of the main shaft of the punching machine tool, the lower part of the main shaft of the punching machine tool is provided with a chuck, and the joint of the main shaft of the punching machine tool and the main shaft box of the punching machine tool is provided with a large end face;
the positioning base 1 is fixed on a working platform of a punching machine tool, a flat bottom hole is formed in the upper end face of the positioning base, the flat bottom hole is matched with the maximum outer diameter of the micro part 9 to be machined and used for placing and positioning the micro part 9 to be machined, and the hole of the micro part 9 to be machined is required to be coaxial with a main shaft of the punching machine tool after installation;
the pressing rod 2 is sequentially provided with three step excircles from top to bottom, which are respectively marked as a first step excircle, a second step excircle and a third step excircle, the first step excircle is connected with a main shaft chuck of the punching machine, and the upper end surface of the second step excircle is tightly attached to the lower end surface of the main shaft chuck of the punching machine to realize positioning; in the processing process, the fine steel ball 10 is punched on the lower end face of the excircle of the third step, and the finishing processing is carried out on the orifice of the fine part 9 to be processed;
the limiting ruler 3 is vertically fixed on the upper surface of the large end face of the main shaft of the punching machine and moves up and down along with the main shaft of the punching machine; the limiting module 4 is of a U-shaped structure, and the U-shaped part of the limiting module penetrates through the limiting ruler 3 and is fixed on the limiting ruler 3 through a fixing screw 5; the limiting snap ring 6 is of an annular structure, penetrates through the limiting ruler 3 and is fixed on the side wall of a main shaft box of the punching machine, the limiting snap ring 6 and the limiting module 4 are matched for relative movement, the movement limiting of the main shaft of the punching machine in the machining process is realized, and the phenomenon that the rounding depth of an orifice is too large due to unstable control in finishing machining is prevented;
the dial indicator 8 is fixed on a working platform bracket of the punching machine tool through the dial indicator frame 7, and a measuring ball head of the dial indicator 8 is in contact with the lower surface of the large end surface of the main shaft of the punching machine tool, so that the accurate control of the displacement of the main shaft of the machine tool in the machining process is realized, and the resolution error of the limiting ruler and the limiting error of the limiting module are eliminated;
the positioning base 1 is fixed on a working platform of the punching machine tool and is positioned right below a main shaft of the punching machine tool;
a flat-bottom rectangular groove is formed in the lower end face of the positioning base 1, the arrangement of the flat-bottom rectangular groove enables the contact area between the positioning base 1 and a working platform of a punching machine tool to be reduced, and the positioning precision of the positioning base 1 is improved;
the diameter of the excircle of the second step of the pressure lever 2 is larger than that of the excircle of the first step, the upper end surface of the excircle of the second step limits the leaping of the pressure lever 2 into the main shaft positioning sleeve when the pressure lever is subjected to the reaction force of the extruded steel ball, and machining consistency errors caused by axial leaping of the pressure lever 2 are prevented;
the diameter of the outer circle of the third step of the pressure lever 2 is larger than the diameter of the tiny steel ball 10, so that when the tiny steel ball 10 is extruded on the lower end face of the outer circle of the third step, the tiny steel ball 10 is stressed in a balanced manner, and the steel ball is prevented from deviating or an orifice is prevented from being rounded and eccentric after being processed due to uneven stress;
the diameter of the excircle of the third step of the pressure lever 2 is about 2 times of the diameter of the tiny steel ball 10;
the limiting module 4 is made of elastic metal materials and can deform after being subjected to fastening force of a fixing screw.
A processing method for finishing an orifice of a micro part to be processed is used, and the device is divided into two stages: the first stage is as follows: adjusting; and a second stage: the step of the adjusting stage is only needed to be carried out once, and the repeated processing stage of a plurality of parts can be entered;
the adjusting stage specifically comprises the following steps:
s1: vertically fixing a limiting ruler 3 in the machining device on the upper surface of the large end surface of the machine tool spindle;
s2: a limiting snap ring 6 in the machining device penetrates through a limiting ruler 3, and the limiting snap ring 6 is fixed on the side wall of a main spindle box of a machine tool;
s3: fixing the dial indicator 8 on a working platform bracket of the punching machine through the dial indicator frame 7, and adjusting a measuring ball head of the dial indicator 8 to be in contact with the lower surface of the large end surface on the main shaft of the punching machine;
s4: the limiting module 4 penetrates through a limiting ruler 3 and is fixed on the limiting ruler 3 through a fixing screw 5;
s5: fixing the positioning base 1 on a working platform of a punching machine tool;
s6: the excircle of the first step of the pressure lever 2 is arranged in a chuck of a main shaft of a punching machine tool, and the upper end surface of the excircle of the second step is closely attached to the lower end surface of the chuck of the main shaft of the machine tool for positioning;
s7: adjusting the position of the positioning base 1 to enable a flat bottom hole of the positioning base 1 to be coaxial with the excircle of a step at the third position of the pressure rod 2;
s8: one end of the maximum outer diameter of the micro part 9 to be processed is downwards slide-fitted into the flat-bottom inner hole of the positioning base 1;
s9: placing a tiny steel ball 10 in the center of the orifice of a tiny part 9 to be processed;
s10: the main shaft of the machine tool is moved downwards until the lower end face of the excircle of the third step of the pressure lever 2 is contacted with the tiny steel ball 10, and the measuring ball head of the dial indicator 8 is adjusted to enable the pointer of the dial indicator 8 to indicate 0;
s11: taking out the tiny steel balls 10;
s12: the machine tool spindle continues to move downwards until the pointer of the dial indicator 8 points to the number 15, namely the machine tool spindle moves to 0.15mm, the fixing position of the limiting module 4 is adjusted to the position that the lower end face of the limiting module is tightly attached to the upper end face of the limiting clamp ring 6;
s13: returning the main shaft of the machine tool to a zero position;
s14: placing a tiny steel ball 10 in the center of the orifice of a tiny part 9 to be processed;
s15: the main shaft of the machine tool moves downwards, the lower end face of the excircle of the third step of the pressure lever 2 extrudes the tiny steel ball 10 until the lower end face of the limiting module 4 is tightly attached to the upper end face of the limiting snap ring 6, and the pointer pointing number 15 of the dial indicator 8 is observed;
s16: taking out the micro part 9 to be processed from the fixed base 1, and measuring the rounding depth of the processed orifice;
s17: if the position of the limiting module 4 on the limiting ruler 3 is qualified, finishing the adjusting stage, if the position of the limiting module 4 on the limiting ruler 3 is unqualified, finely adjusting the position according to the difference value between the actual value and the theoretical value, and repeating the steps S12-S17;
the processing stage specifically comprises the following steps:
s1: after the adjustment stage is finished, entering a repeated processing stage of a plurality of parts, and downwards sliding and assembling one end of the maximum outer diameter of each micro part 9 to be processed into a flat-bottom inner hole of a positioning base 1 in the processing device;
s2: placing a tiny steel ball 10 in the center of the orifice of a tiny part 9 to be processed;
s3: the main shaft of the machine tool moves downwards, the lower end face of the excircle of the third step of the pressure lever 2 extrudes the tiny steel ball 10 until the lower end face of the limiting module 4 is tightly attached to the upper end face of the limiting snap ring 6, and the pointer pointing number 15 of the dial indicator 8 is observed;
s4: and taking out the tiny steel ball 10 and the tiny parts to be processed by using tweezers.
The invention can meet the requirement of fine finishing of the orifice of the micro-part to be processed. Meanwhile, the design idea and the use method of the device can also be used in the finishing processing of other orifices of various types, and the device has general popularization.
The invention solves the problem of poor consistency of the orifice rounding size after finishing the orifice of the micro part to be processed. During operation, the consistency of the rounding size of the orifice can be accurately controlled only by reading on the dial indicator according to the specified steps. After the method is used, the finishing pass rate of the orifice of the micro part to be processed reaches 100%, the consistency is controlled within 0.01mm, and the pattern requirement is completely met.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (10)
1. The device is characterized by being mounted on a punching machine tool in the machining process, wherein a tiny steel ball (10) is arranged in the center of an orifice of a tiny part to be machined (9), the device comprises a positioning base (1), a pressure lever (2), a limiting ruler (3), a limiting module (4), a fixing screw (5), a limiting snap ring (6), a dial indicator frame (7) and a dial indicator (8), the punching machine tool is provided with a working platform, a working platform support fixed on the upper surface of the working platform, a punching machine tool spindle positioned above the working platform and a punching machine tool spindle box connected with the upper part of the punching machine tool spindle, a chuck is arranged at the lower part of the punching machine tool spindle box, and a large end face is arranged at the joint of the punching machine tool spindle and the punching machine tool spindle box;
the positioning base (1) is fixed on a working platform of a punching machine tool, a flat bottom hole is formed in the upper end face of the positioning base (1), the flat bottom hole is matched with the maximum outer diameter of the micro part (9) to be machined and used for placing and positioning the micro part (9) to be machined, and the hole of the micro part (9) to be machined is required to be coaxial with a main shaft of the punching machine tool after installation;
the pressing rod (2) is sequentially provided with three step excircles from top to bottom, which are respectively marked as a first step excircle, a second step excircle and a third step excircle, the first step excircle is connected with a main shaft chuck of the punching machine tool, and the upper end surface of the second step excircle is tightly attached to the lower end surface of the main shaft chuck of the punching machine tool to realize positioning; in the machining process, the fine steel ball (10) is punched on the lower end face of the excircle of the third step, and the orifice of the fine part (9) to be machined is subjected to finishing machining;
the limiting ruler (3) is vertically fixed on the upper surface of the large end face of the main shaft of the punching machine and moves up and down along with the main shaft of the punching machine; the limiting module (4) is of a U-shaped structure, and the limiting module (4) penetrates through the limiting ruler (3) and is fixed on the limiting ruler (3) through a fixing screw (5); the limiting clamp ring (6) is of an annular structure, penetrates through the limiting ruler (3) in a sleeved mode and is fixed to the side wall of a main shaft box of the punching machine, the limiting clamp ring (6) and the limiting module (4) move in a matched and relative mode, movement limiting of a main shaft of the punching machine in a machining process is achieved, and the phenomenon that the rounding depth of an orifice is too large due to unstable control in finishing machining is avoided;
the dial indicator (8) is fixed on the stamping machine tool working platform support through the dial indicator frame (7), and a measuring ball head of the dial indicator (8) is in contact with the lower surface of the large end face of the stamping machine tool spindle, so that the displacement of the stamping machine tool spindle can be accurately controlled in the machining process, and the resolution error of the limiting ruler and the limiting error of the limiting module are eliminated.
2. The device for finishing the orifice of the micro-part to be machined according to claim 1, characterized in that the positioning base (1) is fixed on a working platform of the punching machine and is positioned right below a main shaft of the punching machine.
3. The device for finishing the orifice of the micro-part to be machined according to the claim 1, characterized in that the lower end surface of the positioning base (1) is provided with a flat-bottomed rectangular groove.
4. The device for finishing the orifice of the micro part to be machined according to the claim 1, characterized in that the excircle diameter of the second step of the pressure rod (2) is larger than that of the first step.
5. The device for finishing the orifice of the micro part to be processed is characterized in that the excircle diameter of the third step of the pressure rod (2) is larger than the diameter of the micro steel ball (10).
6. The device for finishing the orifice of the micro part to be processed is characterized in that the excircle diameter of the third step of the pressure rod (2) is 2-3 times of the diameter of the micro steel ball (10).
7. The device for finishing the orifice of the micro part to be machined according to the claim 1, characterized in that the limiting module (4) is made of elastic metal material and is deformed after being fastened by the fixing screw (5).
8. A processing method for finishing the orifice of a micro part to be processed, which uses the device for finishing the orifice of the micro part to be processed, as claimed in any one of claims 1 to 7, and is characterized by being divided into two stages: the first stage is as follows: adjusting; and a second stage: and in the machining stage, the step of the adjusting stage is only needed to be carried out once, and the repeated machining stage of a plurality of micro parts (9) to be machined can be entered.
9. A machining method for the finishing of an orifice of a micro-part to be machined according to claim 8, characterized in that said adjustment phase comprises in particular the following steps:
s1: vertically fixing a limiting ruler (3) in the device on the upper surface of the large end surface of the main shaft of the punching machine tool;
s2: penetrating a limiting snap ring (6) in the device through a limiting ruler (3), and fixing the limiting snap ring (6) on the side wall of a main shaft box of a punching machine;
s3: fixing the dial indicator (8) on a working platform bracket of the punching machine through the dial indicator frame (7), and adjusting a measuring ball head of the dial indicator (8) to be in contact with the lower surface of the large end surface on the main shaft of the punching machine;
s4: the limiting module (4) penetrates through the limiting ruler (3) and is fixed on the limiting ruler (3) through a fixing screw (5);
s5: fixing the positioning base (1) on a working platform of a punching machine tool;
s6: the excircle of the first step of the pressure lever (2) is arranged in a chuck of a main shaft of the punching machine tool, and the upper end surface of the excircle of the second step is closely positioned with the lower end surface of the chuck of the main shaft of the punching machine tool;
s7: adjusting the position of the positioning base (1) to enable a flat bottom hole of the positioning base (1) to be coaxial with the excircle of a step at the third position of the pressure lever (2);
s8: one end of the maximum outer diameter of the micro part (9) to be processed is downwards arranged in a flat-bottom inner hole of the positioning base (1) in a sliding fit mode;
s9: placing the tiny steel ball (10) into the center of the orifice of the tiny part (9) to be processed;
s10: the main shaft of the punching machine moves downwards until the lower end face of the excircle of the step at the third position of the pressure lever (2) is contacted with the tiny steel ball (10), and the measuring ball head of the dial indicator (8) is adjusted to enable the indicator of the dial indicator (8) to indicate 0;
s11: taking out the tiny steel ball (10);
s12: the main shaft of the punching machine tool is enabled to continuously move downwards until the pointer of the dial indicator (8) points to the number 15, namely when the main shaft of the punching machine tool moves 0.15mm, the fixing position of the limiting module (4) is adjusted to the state that the lower end face of the limiting module is tightly attached to the upper end face of the limiting clamp ring (6);
s13: returning the main shaft of the stamping machine to the zero position;
s14: placing the tiny steel ball (10) into the center of the orifice of the tiny part (9) to be processed;
s15: the main shaft of the punching machine moves downwards, the lower end face of the excircle of the third step of the pressure lever (2) extrudes the tiny steel ball (10) until the lower end face of the limiting module (4) is tightly attached to the upper end face of the limiting clamp ring (6), and the pointer pointing number 15 of the dial indicator (8) is observed;
s16: taking out the micro part (9) to be processed from the positioning base (1), and measuring the rounding depth of the processed orifice;
s17: if the position of the limiting module (4) on the limiting ruler (3) is qualified, the adjusting stage is finished, if the position of the limiting module is not qualified, the position of the limiting module (4) on the limiting ruler (3) is finely adjusted according to the difference value of the actual value and the theoretical value, and the steps S12-S17 are repeated.
10. A machining method for the finishing of an orifice of a micro-part to be machined according to claim 8, characterized in that said machining phase comprises in particular the following steps:
s1: after the adjusting stage is finished, entering a repeated processing stage of a plurality of micro parts (9) to be processed, and downwards sliding and assembling one end of the maximum outer diameter of each micro part (9) to be processed into a flat-bottom inner hole of a positioning base (1) in the device;
s2: placing the tiny steel ball (10) into the center of the orifice of the tiny part (9) to be processed;
s3: the main shaft of the punching machine moves downwards, the lower end face of the excircle of the third step of the pressure lever (2) extrudes the tiny steel ball (10) until the lower end face of the limiting module (4) is tightly attached to the upper end face of the limiting clamp ring (6), and the pointer pointing number 15 of the dial indicator (8) is observed;
s4: and taking out the tiny steel ball (10) and the tiny parts to be processed by using tweezers.
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| CN202010892584.3A CN112122428B (en) | 2020-08-28 | 2020-08-28 | Device and method for finishing orifice of tiny part |
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| US3299760A (en) * | 1965-01-05 | 1967-01-24 | Du Pont | Cooperating guide means and reciprocable tool holder |
| US5321976A (en) * | 1992-04-15 | 1994-06-21 | Dalrymple Donald D | Golf green test apparatus |
| CN201773046U (en) * | 2010-09-10 | 2011-03-23 | 长沙理工大学 | Weathered mechanical property tester for rock and soil mass |
| CN102327940B (en) * | 2011-07-19 | 2015-02-18 | 大连液压件有限公司 | Sealing device and process by using steel ball through sealing and rolling compaction |
| CN202926895U (en) * | 2012-11-16 | 2013-05-08 | 大连洁能重工机械有限公司 | Special machine for pressing steel ball into oil hole of thrust bearing of gasoline or diesel engine turbocharger |
| CN206113832U (en) * | 2016-10-26 | 2017-04-19 | 苏州英维特精密机械有限公司 | Small hole depth detecting device |
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