CN214868958U - Drilling machine that drilling accuracy is high - Google Patents
Drilling machine that drilling accuracy is high Download PDFInfo
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- CN214868958U CN214868958U CN202121368365.1U CN202121368365U CN214868958U CN 214868958 U CN214868958 U CN 214868958U CN 202121368365 U CN202121368365 U CN 202121368365U CN 214868958 U CN214868958 U CN 214868958U
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Abstract
The utility model relates to a drilling machine that drilling precision is high, the technical field who relates to flange machine tooling, it includes the frame, it is connected with the main shaft to rotate in the frame, be provided with the installation mechanism that is used for installing the drill bit on the main shaft, installation mechanism includes the coaxial drill bit seat that sets up on the main shaft, wear to be equipped with the drill bit on the drill bit seat, the coaxial locating hole of having seted up on the drill bit seat, the drill bit is close to the coaxial fixedly connected with location axle of one end of drill bit seat, the location axle is worn to establish in the locating hole, installation mechanism is still including the centre gripping subassembly that is used for the centre gripping drill bit, the centre gripping subassembly is connected with the outer peripheral face of drill bit. This application when installing the drill bit on the drill bit seat, uses the locating hole to fix a position the axle earlier, under the positioning action of location axle, even the deviation appears in the in-process of centre gripping subassembly at the centre gripping drill bit, the drill bit still can keep higher axiality with the main shaft, and then when using the drill bit to bore flange blank, improves the smoothness on flange through-hole surface.
Description
Technical Field
The application relates to the field of flange machining, in particular to a drilling machine with high drilling precision.
Background
The flange is a part for connecting the shaft and the shaft, can be used for connecting pipe ends, can be used for connecting an inlet and an outlet of equipment and can be used for connecting the two equipment. The flange is processed and is mostly needed to heat the blank, forge and press, grind the ring, turn and drilling steps, etc., when the flange blank is drilled, the surface smoothness of the through hole on the finished flange can be directly influenced by the installation precision of the drill bit installed on the drilling machine spindle, so that the installation structure between the drill bit and the drilling machine spindle is of great importance to the quality of the finished flange.
At present, the announcement day is 2021 year 04 month 20 days, and chinese utility model patent that the announcement number is CN213003830U provides a make things convenient for anchor clamps for drilling machine drill bit of centre gripping, and it includes drilling machine main part and drill bit, and the drill bit is worn to establish in the drilling machine main part, still is provided with the fixture who is used for the centre gripping drill bit outside the drilling machine main part, and fixture includes a plurality of fly leaves and a plurality of grip blocks, and the fly leaf sets up along the circumference equipartition of drilling machine main part. The grip block also sets up along the circumference equipartition of drilling machine main part, and the grip block is connected in the drilling machine main part along the radial sliding of drilling machine main part. The movable plate is provided with a groove on one end face close to the drilling machine main body, the depth of the groove is gradually changed along the axial direction of the drilling machine main body, and one end, close to the movable plate, of the clamping block is arranged in the groove.
When the drill bit is clamped, the movable plate slides relative to the drilling machine main body along the axial direction of the movable plate, the clamping block gradually extends out towards the center of the drilling machine main body under the pushing action of the bottom of the groove, and then one end, extending into the drilling machine main body, of the clamping block is clamped on the outer peripheral surface of the drill bit.
In view of the above-mentioned related art, the inventor believes that, if the synchronicity of the movable plates is poor during movement, the drill bit cannot be coaxial with the drilling machine main body, and the surface smoothness of the through hole of the finished flange obtained by drilling the flange blank by using the drill bit is reduced.
SUMMERY OF THE UTILITY MODEL
In order to improve the machined smoothness of flange through-hole surface, this application provides a drilling machine that drilling accuracy is high.
The application provides a drilling machine that drilling accuracy is high adopts following technical scheme:
the utility model provides a drilling machine that drilling accuracy is high, includes the frame, it is connected with the main shaft to rotate in the frame, be provided with the installation mechanism that is used for installing the drill bit on the main shaft, installation mechanism includes the coaxial drill bit seat that sets up on the main shaft, wear to be equipped with the drill bit on the drill bit seat, the coaxial locating hole of having seted up on the drill bit seat, the drill bit is close to the coaxial fixedly connected with location axle of one end of drill bit seat, the location axle is worn to establish in the locating hole, installation mechanism is still including the centre gripping subassembly that is used for the centre gripping drill bit, the centre gripping subassembly with the outer peripheral face of drill bit is connected.
By adopting the technical scheme, when the drill bit is arranged on the drill bit seat, the positioning shaft is positioned by using the positioning hole, so that the coaxiality between the drill bit and the drill bit seat can be improved, and then the drill bit is clamped by using the clamping assembly; under the positioning action of location axle, even the deviation appears in the in-process of centre gripping subassembly at the centre gripping drill bit, the drill bit still can keep higher axiality with the main shaft, and then when using the drill bit to bore flange blank, improves the smoothness on flange through-hole surface.
Optionally, the mounting mechanism further includes a guide cylinder for guiding the positioning shaft, the guide cylinder is disposed at one end of the positioning hole far away from the main shaft, an inner diameter of one end of the guide cylinder close to the positioning hole is smaller than an inner diameter of one end of the guide cylinder far away from the positioning hole, and the inner diameter of one end of the guide cylinder close to the positioning hole is the same as the inner diameter of the positioning hole.
By adopting the technical scheme, when the drill bit is arranged in the drill bit seat in a penetrating mode, the positioning shaft is easily and directly inserted into the positioning hole under the guiding action of the inner circumferential surface of the guide cylinder, and the efficiency of installing the drill bit in the drill bit seat is improved.
Optionally, the cross section of the positioning hole is not circular, and the cross section of the positioning shaft is the same as that of the positioning hole.
The drill bit mainly receives circumferential force in the feeding process, so that the drill bit is easy to rotate relative to the drill bit seat.
Optionally, one end of the drill bit close to the positioning shaft is provided with a support portion, and an outer peripheral surface of the support portion abuts against an inner peripheral surface of the guide cylinder.
Through adopting above-mentioned technical scheme, when the installation drill bit, stretch into the drill bit seat with the drill bit and make the outer peripheral face of supporting part and the inner peripheral surface butt of guide cylinder, the supporting part alright resist the moment of flexure that the drill bit received like this, has reduced the probability that takes place bending deformation between location axle and the drill bit.
Optionally, the clamping assembly includes a pressing cylinder, the pressing cylinder is coaxially sleeved on the drill bit seat, a reducing external thread is arranged on the outer circumferential surface of the drill bit seat, a reducing internal thread is arranged on the inner circumferential surface of the pressing cylinder, the pressing cylinder is in threaded connection with the drill bit seat, and a plurality of shrinkage grooves are arranged at one end of the drill bit seat away from the spindle.
By adopting the technical scheme, an operator rotates the compression cylinder to enable one end of the drill bit seat, which is far away from the main shaft, to generate shrinkage deformation, so that one end of the drill bit seat, which is far away from the main shaft, is tightly pressed on the peripheral surface of the drill bit, and the drill bit is tightly pressed; when the pressing cylinder presses the drill bit seat, the drill bit seat contracts more uniformly, so that the bending moment borne by the drill bit is reduced, the probability of bending the drill bit is reduced, and the smoothness of the surface of the through hole of the flange is further improved.
Optionally, the clamping assembly further includes a pressing block, the pressing block is fixedly connected to the inner circumferential surface of one end of the drill bit seat, which is far away from the main shaft, a pressed portion is arranged on the drill bit, the diameter of one end, which is close to the positioning shaft, of the pressed portion is larger than that of one end, which is far away from the positioning shaft, of the pressed portion, and the pressing block is abutted to the outer circumferential surface of the pressed portion.
Through adopting above-mentioned technical scheme, after operating personnel rotated the oppression section of thick bamboo, the briquetting just can compress tightly on the outer peripheral face of pressed portion, because the diameter that pressed portion is close to the one end of location axle is greater than the diameter of keeping away from location axle one end for the drill bit receives the power towards the main shaft, has reduced the probability that the drill bit drops from the drill bit seat.
Optionally, the depth of the positioning hole is greater than the length of the positioning shaft.
By adopting the technical scheme, when the positioning shaft is arranged in the positioning hole in a penetrating mode, the end portion of the positioning shaft is not abutted to the bottom end face of the positioning hole, so that the positioning shaft is not easy to discharge all air in the positioning hole to form a vacuum cavity in the positioning hole, the probability that the positioning shaft is adsorbed in the positioning hole is reduced, and an operator can conveniently detach and replace the drill bit from the drill bit seat.
Optionally, the outer circumferential surface of the positioning shaft is provided with a first air guide groove.
By adopting the technical scheme, when the positioning shaft penetrates through the positioning hole, the first air guide groove can guide air into the positioning hole, so that the probability of forming a vacuum cavity in the positioning hole is further reduced, the probability of adsorbing the positioning shaft in the positioning hole is reduced, and an operator can conveniently detach and replace the drill bit from the drill bit seat.
Optionally, a second air guide groove is formed in the outer peripheral surface of the support portion.
Under the clamping action of clamping component, the supporting part can compress tightly on the inner peripheral surface of guide cylinder, and through adopting above-mentioned technical scheme, when operating personnel need take the drill bit out from the drill bit seat, the leading-in air between supporting part and the guide cylinder can be to the second air guide groove, has reduced the probability that the supporting part adsorbs in the guide cylinder, and the operating personnel of being convenient for pulls down the drill bit from the drill bit seat and changes.
Optionally, the first air guide groove is communicated with the second air guide groove.
Through adopting above-mentioned technical scheme, when operating personnel need take the drill bit out from the drill bit seat, the difficult shutoff by the supporting part of first air guide groove, the air of being convenient for lets in the locating hole from second air guide groove, first air guide groove in, has reduced the probability that the location axle is adsorbed in the locating hole, and operating personnel of being convenient for pulls down the drill bit from the drill bit seat and changes.
In summary, the present application includes at least one of the following beneficial technical effects:
1. through the setting of location axle and locating hole, when installing the drill bit on the drill bit seat, use earlier the locating hole to fix a position the axle, under the positioning action of location axle, even the deviation appears in the in-process of centre gripping subassembly at the centre gripping drill bit, the drill bit still can keep higher axiality with the main shaft, and then when using the drill bit to drill the flange blank, improves the smoothness on flange through-hole surface.
2. The drill bit mainly receives circumferential force in the feeding process, so that the drill bit is easy to rotate relative to the drill bit seat, the cross section of the positioning hole is not circular, the drill bit is not easy to rotate relative to the drill bit seat under the limiting action of the positioning hole and the positioning shaft, and the smoothness of the surface of the through hole of the flange is further improved when the flange is machined.
3. Through the arrangement of the pressing block and the pressed part, the drill bit is pressed circumferentially and axially, so that the probability of axial displacement between the drill bit and the drill bit seat is reduced, and the probability of falling off of the drill bit from the drill bit seat is reduced.
4. Through the setting of first air guide groove and second air guide groove, the air can get into the locating hole total through first air guide groove and second air guide groove, and then can reduce the probability that the drill bit adsorbs on the drill bit seat.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;
FIG. 2 is an exploded view of the mounting mechanism of the present application;
FIG. 3 is a cross-sectional schematic view of a mounting mechanism according to an embodiment of the present application.
Description of reference numerals: 100. a frame; 110. a main shaft; 120. a drive motor; 200. an installation mechanism; 210. a bit seat; 211. an accommodating chamber; 212. positioning holes; 213. a contraction groove; 220. a guide cylinder; 230. a clamping assembly; 231. a compression cylinder; 232. briquetting; 300. a drill bit; 310. a support portion; 311. a second gas guiding groove; 320. a pressure receiving portion; 400. positioning the shaft; 410. a first air guide groove.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The embodiment of the application provides a drilling machine that drilling precision is high. Referring to fig. 1 and 2, a drill press with high drilling accuracy includes a frame 100, a spindle 110 rotatably connected to the frame 100, and the spindle 110 driven by a driving motor 120 fixedly connected to the frame 100. The main shaft 110 is provided with a mounting mechanism 200 for mounting the drill bit 300, and the mounting mechanism 200 comprises a drill bit seat 210 coaxially and fixedly connected to the main shaft 110 through a coupler and a clamping assembly 230 arranged on the drill bit seat 210. The drill bit 300 is mounted on a bit mount 210, the bit mount 210 radially positions the drill bit 300, and the clamping assembly 230 axially positions the drill bit 300 and clamps the drill bit 300.
Referring to fig. 2 and 3, the lower portion of the drill seat 210 is provided with an accommodating cavity 211 for accommodating the drill 300, the bottom end surface of the accommodating cavity 211 is provided with a positioning hole 212, and the positioning hole 212 and the drill seat 210 are coaxially arranged. The drill 300 is coaxially and integrally formed with a positioning shaft 400, and when the drill 300 is inserted into the accommodating cavity 211, the positioning shaft 400 is coaxially inserted into the positioning hole 212. After the drill 300 is mounted on the drill base 210, the positioning shaft 400 positions the drill 300, so that the drill 300 can keep a high coaxiality with the main shaft 110, and further, the smoothness of the surface of the through hole of the flange is improved when the drill 300 is used for drilling the flange blank.
Referring to fig. 2 and 3, in order to facilitate the positioning shaft 400 to be inserted into the positioning hole 212, the mounting mechanism 200 further includes a guide cylinder 220 for guiding the positioning shaft 400, and the guide cylinder 220 is integrally formed with the bit holder 210 or the guide cylinder 220 is embedded in the accommodating cavity 211. The guide cylinder 220 is integrally arranged with the drill 300, the inner diameter of one end of the guide cylinder 220 close to the positioning hole 212 is the same as that of the positioning hole 212, and the inner diameter of one end of the guide cylinder 220 far away from the positioning hole 212 is larger than that of the positioning hole 212. When the drill bit 300 is inserted into the accommodating cavity 211, the positioning shaft 400 gradually slides into the positioning hole 212 under the guiding action of the inner circumferential surface of the guide cylinder 220, so that the difficulty of positioning the drill bit 300 by an operator is reduced, and the installation efficiency is improved.
Referring to fig. 2 and 3, during the feeding process of the drill 300, the drill 300 is pressed in the axial direction, and the connection between the drill 300 and the positioning shaft 400 is easily broken. In order to reduce the probability of breaking the connection between the drill 300 and the positioning shaft 400, a support portion 310 is provided at one end of the drill 300 close to the positioning shaft 400, the support portion 310 is disposed in a truncated cone shape, and the outer circumferential surface of the support portion 310 abuts against the inner circumferential surface of the guide cylinder 220. Under the supporting action of the guide cylinder 220 and the positioning hole 212, bending stress is not easily generated between the supporting portion 310 and the positioning shaft 400, so that the probability of bending and even breaking between the supporting portion 310 and the positioning shaft 400 is reduced, and the drilling precision is improved. In order to make the supporting portion 310 better fit with the guiding cylinder 220, the depth of the positioning hole 212 is greater than the length of the positioning shaft 400, so that the positioning shaft 400 does not abut against the bottom end face of the positioning hole 212, and the supporting portion 310 is convenient to fit with the guiding cylinder 220.
Referring to fig. 2 and 3, during the drilling process using the drill 300, if the drill 300 and the drill base 210 rotate relatively, the accuracy of the drilling process may be reduced. In order to reduce the probability of relative rotation between the drill 300 and the drill seat 210, the cross sections of the positioning hole 212 and the positioning shaft 400 are not circular, and the cross section of the positioning shaft 400 is the same as that of the positioning hole 212. In the embodiment of the present application, the cross section of the positioning shaft 400 is elliptical, so that the stress concentration phenomenon is not easily generated on the positioning shaft 400, and the service life of the positioning shaft 400 is prolonged. In other embodiments, the positioning shaft 400 may also be configured to be rectangular or kidney-shaped.
Referring to fig. 2 and 3, the clamping assembly 230 includes a pressing cylinder 231 for pressing the drill seat 210 to deform, the pressing cylinder 231 is coaxially sleeved on the drill seat 210, an inner circumferential surface of the pressing cylinder 231 is provided with a variable diameter inner thread, an outer circumferential surface of one end of the drill seat 210 away from the spindle 110 is provided with a variable diameter outer thread, and the pressing cylinder 231 is in threaded connection with the drill seat 210. One end of the pressing cylinder 231, which is far away from the main shaft 110, is provided with a plurality of contraction grooves 213, the contraction grooves 213 are arranged along the length direction of the pressing cylinder 231, and the plurality of contraction grooves 213 are uniformly distributed in the circumferential direction of the drill bit seat 210.
The operator rotates the pressing cylinder 231 to make one end of the bit seat 210 away from the main shaft 110 contract and deform inward, so that the bit seat 210 can be clamped on the outer circumferential surface of the drill 300. Because the shrinkage grooves 213 are uniformly distributed on the drill bit seat 210, when the compression cylinder 231 compresses the drill bit seat 210, the drill bit seat 210 shrinks more uniformly, the bending moment borne by the drill bit 300 is reduced, the bending probability of the drill bit 300 is reduced, and the smoothness of the surface of the flange through hole is further improved
Referring to fig. 2 and 3, if the drill 300 is not completely clamped by the clamping mechanism, the drill 300 may fall off the drill seat 210 during the retracting process. For this, the clamping assembly 230 further includes a pressing block 232 disposed in the accommodating cavity 211, the pressing block 232 is integrally formed on an inner circumferential surface of an end of the bit seat 210 away from the main shaft 110, and the pressing block 232 is disposed along a circumferential direction of the accommodating cavity 211. The drill 300 is provided with a pressed part 320 abutted against the pressing block 232, the pressed part 320 is arranged in a circular truncated cone shape, and the diameter of one end, close to the positioning shaft 400, of the pressed part 320 is larger than that of one end, far away from the positioning shaft 400.
When the end of the bit seat 210 away from the spindle 110 contracts and deforms, the pressing block 232 presses against the outer circumferential surface of the pressed portion 320, so that the pressing block 232 can apply a force to the bit 300 towards the spindle 110, and at this time, the support portion 310 can completely press against the inner circumferential surface of the guide cylinder 220, and the bit 300 is not easily detached from the bit seat 210.
Referring to fig. 2 and 3, the support portion 310 is completely pressed against the inner circumferential surface of the guide cylinder 220 due to the pressing block 232, and the positioning shaft 400 pushes out air in the positioning hole 212, so that the drill 300 is not easily detached from the drill seat 210 due to the vacuum formed in the positioning hole 212 and between the support portion 310 and the guide cylinder 220 when the drill 300 is removed and replaced. In order to facilitate the detachment of the drill bit 300 from the drill bit seat 210, the outer circumferential surface of the positioning shaft 400 is provided with a first air guide groove 410, the outer circumferential surface of the supporting portion 310 is provided with a second air guide groove 311, the first air guide groove 410 and the second air guide groove 311 are uniformly distributed along the circumferential direction of the drill bit 300, and the first air guide groove 410 is communicated with the second air guide groove 311.
When the drill bit 300 is removed, air in the atmosphere can flow into the positioning hole 212 through the second air guide groove 311 and the first air guide groove 410, so that a vacuum is not easily formed in the positioning hole 212; the atmosphere can also flow into the space between the support portion 310 and the guide cylinder 220 through the second air guide slot 311, so that a vacuum is not easily formed between the support portion 310 and the guide cylinder 220, and the operator can detach the drill bit 300 from the drill bit seat 210.
The implementation principle of the drilling machine that this application embodiment drilling accuracy is high does:
when the drill 300 is mounted on the drill base 210, the drill 300 is first inserted into the accommodating cavity 211, and the positioning shaft 400 is inserted into the positioning hole 212, so that the drill 300 can be radially positioned; then, the pressing cylinder 231 is rotated, the pressing cylinder 231 presses one end of the drill bit seat 210 away from the main shaft 110 to deform, so that the pressing block 232 is pressed on the outer peripheral surface of the pressed part 320, and the pressing block 232 applies a force to the pressed part 320 towards the main shaft 110 when pressing the pressed part 320, so that the drill bit 300 can be clamped, and meanwhile, the drill bit 300 is axially positioned. After the drill bit 300 is clamped, the drill bit 300 can be positioned radially and the drill bit 300 can be positioned axially, so that the positioning accuracy of the drill bit 300 is higher, the drilling accuracy is improved, and the surface smoothness of the flange through hole is ensured. Because the cross sections of the positioning shaft 400 and the positioning hole 212 are both elliptical, the drill bit 300 is not easy to rotate relative to the drill bit seat 210 in the drilling process, the precision in drilling is further improved, and the surface smoothness of the flange through hole is ensured.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The drilling machine is high in drilling precision and is characterized by comprising a rack (100), a main shaft (110) is connected to the rack (100) in a rotating mode, an installation mechanism (200) used for installing a drill bit (300) is arranged on the main shaft (110), the installation mechanism (200) comprises a drill bit seat (210) coaxially arranged on the main shaft (110), the drill bit (300) penetrates through the drill bit seat (210), a positioning hole (212) is coaxially formed in the drill bit seat (210), the drill bit (300) is close to one end of the drill bit seat (210) and is fixedly connected with a positioning shaft (400), the positioning shaft (400) penetrates through the positioning hole (212), the installation mechanism (200) further comprises a clamping component (230) used for clamping the drill bit (300), and the clamping component (230) is connected with the outer peripheral face of the drill bit (300).
2. The drilling machine with high drilling precision as claimed in claim 1, wherein: the mounting mechanism (200) further comprises a guide cylinder (220) used for guiding the positioning shaft (400), the guide cylinder (220) is arranged at one end, far away from the main shaft (110), of the positioning hole (212), the inner diameter of one end, close to the positioning hole (212), of the guide cylinder (220) is smaller than that of one end, far away from the positioning hole (212), of the guide cylinder (220), and the inner diameter of one end, close to the positioning hole (212), of the guide cylinder (220) is the same as that of the positioning hole (212).
3. The drilling machine with high drilling precision as claimed in claim 1, wherein: the cross section of the positioning hole (212) is not circular, and the cross section of the positioning shaft (400) is the same as that of the positioning hole (212).
4. The drilling machine with high drilling precision as claimed in claim 2, wherein: one end of the drill bit (300) close to the positioning shaft (400) is provided with a supporting part (310), and the outer peripheral surface of the supporting part (310) is abutted against the inner peripheral surface of the guide cylinder (220).
5. The drilling machine with high drilling precision according to any one of claims 1-4, characterized in that: the clamping assembly (230) comprises a pressing cylinder (231), the pressing cylinder (231) is coaxially sleeved on the drill bit seat (210), the outer peripheral surface of the drill bit seat (210) is provided with variable-diameter external threads, the inner peripheral surface of the pressing cylinder (231) is provided with variable-diameter internal threads, the pressing cylinder (231) is in threaded connection with the drill bit seat (210), and one end, far away from the main shaft (110), of the drill bit seat (210) is provided with a plurality of shrinkage grooves (213).
6. The drilling machine with high drilling precision as claimed in claim 5, wherein: the clamping assembly (230) further comprises a pressing block (232), the pressing block (232) is fixedly connected to the inner circumferential surface of one end, away from the main shaft (110), of the drill bit seat (210), a pressed portion (320) is arranged on the drill bit (300), the diameter of one end, close to the positioning shaft (400), of the pressed portion (320) is larger than the diameter of one end, away from the positioning shaft (400), of the pressed portion, and the pressing block (232) is abutted to the outer circumferential surface of the pressed portion (320).
7. The drilling machine with high drilling precision according to any one of claims 1-4, characterized in that: the depth of the positioning hole (212) is larger than the length of the positioning shaft (400).
8. The drilling machine with high drilling precision as claimed in claim 4, wherein: the outer peripheral surface of the positioning shaft (400) is provided with a first air guide groove (410).
9. The drilling machine with high drilling precision as recited in claim 8, wherein: the outer circumferential surface of the supporting part (310) is provided with a second air guide groove (311).
10. The drilling machine with high drilling precision as claimed in claim 9, wherein: the first air guide groove (410) is communicated with the second air guide groove (311).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121368365.1U CN214868958U (en) | 2021-06-18 | 2021-06-18 | Drilling machine that drilling accuracy is high |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121368365.1U CN214868958U (en) | 2021-06-18 | 2021-06-18 | Drilling machine that drilling accuracy is high |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214868958U true CN214868958U (en) | 2021-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121368365.1U Active CN214868958U (en) | 2021-06-18 | 2021-06-18 | Drilling machine that drilling accuracy is high |
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| Country | Link |
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| CN (1) | CN214868958U (en) |
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2021
- 2021-06-18 CN CN202121368365.1U patent/CN214868958U/en active Active
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