CN210232261U - Large-scale box rough milling positioning and pressing device - Google Patents
Large-scale box rough milling positioning and pressing device Download PDFInfo
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- CN210232261U CN210232261U CN201920708278.2U CN201920708278U CN210232261U CN 210232261 U CN210232261 U CN 210232261U CN 201920708278 U CN201920708278 U CN 201920708278U CN 210232261 U CN210232261 U CN 210232261U
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Abstract
The rough milling positioning and pressing device for the large box comprises a positioning shaft, a tensioning groove and a tensioning block, wherein the tensioning block can slide along the groove wall of the tensioning groove, and when the tensioning block slides to the outermost side, the surface of the tensioning block protrudes out of the outer surface of the positioning shaft; the tension device is characterized in that a pressing groove is formed above the tension groove, a pressing shaft is arranged in the pressing groove, a pressing spring is arranged on the pressing shaft in a relatively rotatable mode, one end of the pressing spring is sleeved on the pressing shaft, the other end of the pressing spring extends downwards into the tension groove, and a pressing portion protruding out of the surface of the positioning shaft is arranged in the middle of the pressing spring. The workpiece can be quickly compressed when the workpiece is quickly positioned and clamped, the problem that the workpiece is jumped along with when a box body or a large-size plate with a lower height is roughly machined due to the fact that the cutter jumps on a rough casting surface is solved, the cutter is prevented from being damaged, and reasonable rough machining precision is guaranteed as much as possible.
Description
Technical Field
The utility model relates to a large-scale box rough milling location closing device.
Background
In the processing process of a large box body, a main shaft hole or an opening of the large box body is usually processed through rough processing and fine processing, and the clamping precision requirements of different processes are different; the mounting holes or positioning holes or surfaces of the box body utilized for clamping the box body during machining are generally required to be further processed after rough machining and then used for finish machining, so that the clamping and positioning of the box body can be repeatedly carried out in the whole machining process. For small-size parts, the problem of repeated clamping is not great, and for large-size boxes such as the box in fig. 1, the size and the weight are both large, the clamping difficulty is high, and the clamping is troublesome. Especially for batch processing of several large boxes, the efficiency is low.
In the rough machining stage, the requirement on the positioning precision is not high, so that the rapid positioning and clamping can be considered in the rough machining stage, the clamping difficulty is reduced, and the machining efficiency is improved.
In addition, for a box body with a lower height or a large-size plate, the weight in a unit area range is not too large, when the box body or the large-size plate is quickly positioned and clamped, the problem of workpiece following jumping caused by the jumping of a cutter on a rough casting surface during rough machining needs to be prevented, the cutter is prevented from being damaged, and reasonable rough machining precision is guaranteed as much as possible.
SUMMERY OF THE UTILITY MODEL
In view of above situation, in order to solve the problem that above-mentioned technique exists, the utility model provides a large-scale box rough milling location closing device can carry out rough milling at large-scale box and add man-hour, provides the quick location clamping, reduces the clamping degree of difficulty, promote the work efficiency who adds man-hour in batches, can compress tightly the work piece fast simultaneously, prevent that highly lower box or jumbo size plate from adding man-hour because the cutter beats the work piece that arouses at rough casting surface and follow the problem of beating in rough machining, avoid damaging the cutter, also guarantee reasonable rough machining precision as far as possible.
According to the utility model discloses a large-scale box rough milling positioning and compressing device, including the location axle, the location axle is hollow structure, is equipped with two or more than two tight grooves that rise on the axle wall of location axle, rise two by two the tight groove that rise and set up relatively; the tensioning grooves are internally provided with tensioning blocks, and springs for pushing the opposite tensioning blocks out of the positioning shaft are arranged between the tensioning blocks arranged in the two oppositely arranged tensioning grooves; the tensioning block can slide along the wall of the tensioning groove, and when the tensioning block slides to the outermost side, the surface of the tensioning block protrudes out of the outer surface of the positioning shaft; the tension device is characterized in that a pressing groove is formed above the tension groove, a pressing shaft is arranged in the pressing groove, a pressing spring is arranged on the pressing shaft in a relatively rotatable mode, one end of the pressing spring is sleeved on the pressing shaft, the other end of the pressing spring extends downwards into the tension groove, and a pressing portion protruding out of the surface of the positioning shaft is arranged in the middle of the pressing spring.
Through the arrangement of the pressing spring, when the box body is clamped in place and is tensioned and positioned by the tensioning block, the pressing spring can press the upper edge of the box body positioning hole, and the possible jumping of the box body in the machining process is counteracted through the pressing force of the pressing spring. Through setting up the portion that compresses tightly, be convenient for from compressing tightly downwards and outwards propping the locating hole edge above the groove. Compress tightly the groove through setting up and hold down the spring and provide its activity space in order to hold down, compress tightly the in-process, compress tightly the spring and have certain deformation and around the rotation of compress tightly the axle, warp and rotate the in-process, compress tightly the spring and receive the restriction of location axle outer wall and tight piece outer wall that rises, can produce rebound pressure to the box locating hole.
In addition, through setting up the portion that compresses tightly, make the compression spring form a structure that all has the slope changeover portion from top to bottom, when the box of being convenient for hoists from top to bottom, the box locating hole can be smoothly through compression spring department.
The pressing spring is preferably made of hard or thicker spring wires, and is preferably slightly more rigid, or is made of a spring steel plate, or is provided with a plurality of spring wires or spring plates.
Preferably, the pressing spring is provided with a pressing linkage part on the other side opposite to the pressing part, and the pressing linkage part is fixedly connected with a tension block arranged in the tension groove on the opposite side.
Preferably, be equipped with on the tight piece that rises with spacing portion of location axle inner wall butt, be equipped with thrust slot in the spacing portion, the both ends of spring set up respectively in the relative tight piece that rises's that rises thrust slot, thrust slot top still is equipped with spring plate, the last joint hole that is equipped with of spring plate, the tip that compresses tightly linkage portion is equipped with the end of buckling, buckle the end card and go into to be connected in the joint hole that sets up on the spring plate.
Through the arrangement of the pressing linkage part, when the pressing spring presses the box body positioning hole and rotates around the pressing shaft, the pressing linkage part on the other side is limited by the tension block, so that overlarge rotation is avoided, and the required elastic pressing force is ensured. In addition, when the box body is lifted to separate from the positioning shaft, the lifting force is far greater than the tension force and the pressing force of the pressing spring, and the box body positioning hole can force the pressing spring to deform and move inwards, so that smooth separation from contact can be guaranteed.
Preferably, the upper end and the lower end of the outer surface of the tensioning block are respectively provided with a guide inclined plane, and one end of the pressing spring, which extends downwards into the tensioning groove, extends into an inward concave space formed by the guide inclined planes. Providing a deformation space for the compression spring when stressed.
Preferably, a retreat groove for communicating the pressing groove and the tension groove is formed between the pressing groove and the tension groove on the shaft wall of the positioning shaft. The deformation space of the compression spring under stress is provided, and particularly when the positioning shaft is sleeved on the box body hoisting sleeve or separated from the positioning shaft, the retreat groove can provide a space for accommodating the compression spring after compression deformation due to the fact that the diameter difference between the box body positioning hole and the positioning shaft is not large.
Preferably, a retreating chamfer is arranged on the shaft wall of the positioning shaft at the top of the retreating groove. The deformation activity space of the compression spring is provided, interference is avoided, and interference when the compression spring is deformed greatly in the process of hoisting the box body is particularly avoided.
Preferably, the pressing shaft is fixedly arranged in a shaft hole arranged on the shaft wall of the positioning shaft at the pressing groove in an interference fit mode, and the pressing shaft penetrates through the pressing groove. The setting method can directly drill shaft holes on the shaft walls of the positioning shafts on the two sides of the pressing groove, then press the pressing shaft until the shaft end enters the pressing groove, install the pressing spring, and continue to press the pressing shaft into the opposite shaft hole. The pressing shaft can be directly ejected out through the ejector rod during disassembly.
After the technology provided by the utility model, according to the utility model discloses large-scale box rough milling location closing device has following beneficial effect: by providing the matching of the quick positioning shaft and the pressing assembly which are easy to assemble and disassemble, the quick positioning and clamping can be provided when the large box body is subjected to rough milling, the clamping difficulty is reduced, and the working efficiency in batch processing is improved; meanwhile, the workpiece can be quickly compressed, the problem that the workpiece is jumped along with the cutter caused by the jumping of the cutter on the rough casting surface during rough machining of the box body or the large-size plate with lower height is prevented, the cutter is prevented from being damaged, and reasonable rough machining precision is guaranteed as much as possible.
Drawings
FIG. 1 is a schematic view of the rough milling positioning device for a large box in embodiment 1;
FIG. 2 is a sectional view of the positioning shaft of embodiment 1;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is a top view of FIG. 2;
FIG. 5 is a schematic view showing a state of use of the rough milling, positioning and pressing device for the large box in embodiment 2;
FIG. 6 is a sectional view of the positioning shaft of embodiment 2;
FIG. 7 is a left side view of FIG. 6;
FIG. 8 is an enlarged view of portion B of FIG. 6;
fig. 9 is a top view of fig. 6.
Description of reference numerals:
the clamping device comprises a positioning shaft 1, a tensioning groove 10, a tensioning block 2, a limiting part 20, a thrust groove 21, a spring pressing plate 22, a spring guide slope 23, a guide inclined plane 29, a spring 3, a pressing spring 5, a pressing groove 50, a pressing shaft 51, a pressing linkage part 58, a bending end 581, a pressing part 59, a retreating groove 60, a retreating chamfer 61, a box body 9 and a clamping positioning platform 90.
Detailed Description
The present invention will be described in further detail with reference to embodiments shown in the drawings. The described embodiments include various specific details to aid understanding, but they are to be construed as merely illustrative, and not restrictive of all embodiments of the invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. Meanwhile, in order to make the description more clear and concise, a detailed description of functions and configurations well known in the art will be omitted.
Example 1
As shown in fig. 1 to 4, the rough milling positioning device for the large box comprises a positioning shaft 1, wherein the positioning shaft 1 is of a hollow structure, two or more than two tensioning grooves 10 are arranged on the shaft wall of the positioning shaft 1, and the tensioning grooves 10 are arranged in pairs in a relative manner; the tensioning grooves 10 are internally provided with tensioning blocks 2, and springs 3 for pushing the tensioning blocks 2 out of the positioning shaft 1 are arranged between the tensioning blocks 2 arranged in the two tensioning grooves 10 which are oppositely arranged; the tensioning block 2 is arranged to slide along the wall of the tensioning groove 10, and when the tensioning block 2 slides to the outermost side, the surface of the tensioning block 2 protrudes out of the outer surface of the positioning shaft 1.
When the mounting hole of the box body is sleeved on the positioning shaft 1, the tensioning block 2 is pushed to slide along the tensioning groove 10 and retract into the positioning shaft 1. The box body continues to move downwards under the dead weight and stops after reaching the lowest point. In the process and after the process, the tensioning blocks 2 are acted by the springs 3 to push the corresponding tensioning blocks 2 out of the positioning shaft 1, so that the tensioning blocks 2 can be tightly pressed on the inner walls of the positioning holes of the box body to complete quick positioning. The hollow structure of the positioning shaft 1 is used for accommodating the spring 3 and the limit structure of the tension block 2 in the positioning shaft 1, and is used for installing the tension block 2 into the tension groove 10 from the inside through the hollow structure.
The tensioning block 2 is provided with a limiting part 20 which is abutted against the inner wall of the positioning shaft 1. Used for limiting the position of the tensioning block 2 and preventing the tensioning block 2 from sliding out of the tensioning groove 10.
The limiting part 20 is provided with a thrust groove 21, and two ends of the spring 3 are respectively arranged in the thrust grooves 21 of the tensioning blocks 2 which are oppositely arranged.
The outer side of the thrust groove 21 is further provided with a spring pressing plate 22, the spring pressing plate 22 is fixedly connected to the surface, which is not provided with the thrust groove 21, of the limiting part 20, and the end part of the spring 3 is located in a space formed by enclosing the spring pressing plate 22 and the thrust groove 21.
The outer side of the thrust groove 21 is also provided with a spring guide ramp 23. For installing the spring 3, because the spring 3 needs to pass through a space in the positioning shaft 1 when being installed, although the spring 3 can be pressed in by a tool, the spring 3 is more conveniently pressed in after the spring guide slope 23 is arranged. The spring pressing plate 22 is fixed on the surface of the limiting part 20, which is not provided with the thrust groove 21, through screw connection, and the spring pressing plate 22 is fixed through screws after the springs are pressed in. Depending on the size and space of the specific implementation, when it is inconvenient to tighten the screw, the spring pressing plate 22 may be connected to the upper surface or the lower surface of the stopper 20 by welding or bonding.
In each set of the tension blocks 2 which are oppositely arranged, the upper end and the lower end of each tension block 2 are respectively provided with a limiting part 20 and a thrust groove 21 thereof; the two groups of springs 3 are also arranged, and the end parts of the two groups of springs 3 are respectively positioned in the thrust grooves 21 at the upper end and the lower end of the tensioning block 2.
The upper end and the lower end of the outer surface of the tensioning block 2 are respectively provided with a guide inclined plane 29. The box body can be conveniently sleeved in and withdrawn.
The two or more than two tensioning grooves 10 are uniformly distributed on the positioning shaft 1 around the axis of the positioning shaft 1.
The positioning shaft 1 is provided with threads on a shaft section below the tensioning groove 10 and is fixedly arranged on the clamping and positioning platform 90 through threaded connection; the rest shaft sections of the positioning shaft 1 are smooth surfaces, and the end part of the positioning shaft 1 is provided with a smooth chamfer. When the positioning hole on the large box 9 to be processed moves downwards from the end part of the positioning shaft 1 to the shaft section part provided with the tensioning groove 10, the positioning hole is pressed by the tensioning block 2 to be quickly positioned. During clamping, the box body can be directly hung on the clamping positioning platform 90, the positioning shaft 1 is downwards moved and aligned to the positioning hole, and when the box body falls to be in contact with the clamping positioning platform 90, clamping can be completed. When the box body is dismounted, the box body is directly lifted out, the lifting force is far greater than the tensioning friction force, and the tensioning positioning can be automatically released.
According to the positioning device for rough milling of the large box body, the quick positioning shaft easy to disassemble and assemble is provided, so that the quick positioning and clamping can be provided when the large box body is roughly milled, the clamping difficulty is reduced, and the working efficiency during batch processing is improved.
Example 2
As shown in fig. 5 to 9, the present embodiment is different from embodiment 1 in that a positioning and pressing device is provided.
A large-scale box rough milling positioning and pressing device comprises a positioning shaft 1, wherein the positioning shaft 1 is of a hollow structure, two or more than two tensioning grooves 10 are formed in the shaft wall of the positioning shaft 1, and the tensioning grooves 10 are arranged in pairs in a relative mode; the tensioning grooves 10 are internally provided with tensioning blocks 2, and springs 3 for pushing the tensioning blocks 2 out of the positioning shaft 1 are arranged between the tensioning blocks 2 arranged in the two tensioning grooves 10 which are oppositely arranged; the tensioning block 2 is arranged to slide along the wall of the tensioning groove 10, and when the tensioning block 2 slides to the outermost side, the surface of the tensioning block 2 protrudes out of the outer surface of the positioning shaft 1;
a pressing groove 50 is arranged above the tensioning groove 10, a pressing shaft 51 is arranged in the pressing groove 50, a pressing spring 5 is arranged on the pressing shaft 51 in a relatively rotatable manner, one end of the pressing spring 5 is sleeved on the pressing shaft 51, the other end of the pressing spring 5 extends downwards into the tensioning groove 10, and a pressing part 59 protruding out of the surface of the positioning shaft 1 is arranged in the middle of the pressing spring 5.
Through the arrangement of the pressing spring 5, when the box body is clamped in place and is tensioned and positioned by the tensioning block 2, the pressing spring 5 can press the upper edge of the box body positioning hole, and the jumping possibly generated in the machining process of the box body is offset through the pressing force of the pressing spring. The hold-down portion 59 facilitates bracing the edge of the positioning hole downwardly and outwardly from above the hold-down slot 50. Through setting up compressing tightly groove 50 in order to hold compressing spring 5 and provide its activity space, compressing tightly the in-process, compressing spring 5 has certain deformation and around compressing shaft 51's rotation, and at deformation and rotation in-process, compressing spring 5 receives the restriction of the outer wall of location axle 1 and the 2 outer walls of tight piece that rise, can produce rebound pressure to the box locating hole.
In addition, through setting up compressing tightly portion 59, make compressing tightly spring 5 form one and have the structure of slope changeover portion from top to bottom, when being convenient for the box hoist from top to bottom, the box locating hole can be smoothly through compressing tightly spring 5 department.
The compression spring 5 is preferably made of a hard or thick spring wire with a slightly larger rigidity, or a spring steel plate is selected, or a plurality of spring wires or spring plates are arranged in a group.
The pressing spring 5 is provided with a pressing linkage part 58 on the other side opposite to the pressing part 59, and the pressing linkage part 58 is fixedly connected with the tension block 2 arranged in the opposite tension groove 10.
Be equipped with on the tight piece 2 that rises with spacing portion 20 of the 1 inner wall butt of location axle, be equipped with thrust groove 21 in spacing portion 20, the both ends of spring 3 set up respectively in the relative tight piece 2's that rises thrust groove 21 that rises that sets up, thrust groove 21 top still is equipped with spring clamp plate 22, be equipped with the joint hole on the spring clamp plate 22, the tip that compresses tightly linkage 58 is equipped with buckle end 581, buckle end 581 card income is connected in the joint hole that sets up on the spring clamp plate 22.
Through the arrangement of the pressing linkage part 58, when the pressing spring 5 presses the box body positioning hole and rotates around the pressing shaft 51, the pressing linkage part 58 on the other side is limited by the tension block 2, so that overlarge rotation is avoided, and the required elastic pressing force is ensured. In addition, when the box body is lifted to be separated from the positioning shaft 1, as the lifting force is far greater than the tension force and the pressing force of the pressing spring 5, the positioning hole of the box body can force the pressing spring 5 to deform and move inwards, and smooth separation from contact can be ensured.
The upper end and the lower end of the outer surface of the tensioning block 2 are respectively provided with a guide inclined plane 29, and one end of the compression spring 5 extending downwards into the tensioning groove 10 is inserted into an inward concave space formed by the guide inclined planes 29. Providing a space for the compression spring 5 to deform when subjected to a force.
On the shaft wall of the positioning shaft 1, a retreat groove 60 for communicating the pressing groove 50 with the tension groove 10 is provided between the pressing groove 50 and the tension groove 10. The deformation space of the compression spring 5 is provided when the compression spring is stressed, and particularly when the box hoisting sleeve is sleeved with the positioning shaft 1 or is separated from the positioning shaft 1, the diameter difference between the box positioning hole and the positioning shaft 1 is not large, and the retreat groove 60 can provide a space for accommodating the compression spring 5 after being subjected to compression deformation.
And a retreating chamfer 61 is arranged on the shaft wall of the positioning shaft 1 at the top of the retreating groove 60. The deformation movable space for the compression spring 5 is provided, interference is avoided, and interference when the compression spring 5 deforms greatly in the process of hoisting the box body is particularly avoided.
The pressing shaft 51 is fixedly arranged in a shaft hole arranged on the shaft wall of the positioning shaft 1 at the pressing groove 50 through interference fit, and the pressing shaft 51 penetrates through the pressing groove 50. The setting method can directly drill shaft holes on the shaft walls of the positioning shafts 1 on the two sides of the pressing groove 50, then press the pressing shaft 51 until the shaft end enters the pressing groove 50, install the pressing spring 5, and continue to press the pressing shaft 51 to the opposite shaft hole. When the device is disassembled, the pressing shaft 51 can be directly ejected out through the ejector rod.
According to the large box rough milling positioning and pressing device, the quick positioning shaft and the pressing assembly which are easy to disassemble and assemble are matched, so that quick positioning and clamping can be provided when the large box is subjected to rough milling processing, the clamping difficulty is reduced, and the working efficiency during batch processing is improved; meanwhile, the workpiece can be quickly compressed, the problem that the workpiece is jumped along with the cutter caused by the jumping of the cutter on the rough casting surface during rough machining of the box body or the large-size plate with lower height is prevented, the cutter is prevented from being damaged, and reasonable rough machining precision is guaranteed as much as possible.
The terms "upper", "lower" or "above", "below" or the like are used herein in a relative relationship with respect to a normal use in a placed state, i.e., a positional relationship as generally shown in the drawings of the present application. When the placement state changes, for example, when the placement state is turned over, the corresponding positional relationship should be changed accordingly to understand or implement the technical solution of the present application.
Claims (7)
1. The rough milling positioning and compressing device for the large box body is characterized by comprising a positioning shaft (1), wherein the positioning shaft (1) is of a hollow structure, two or more than two tensioning grooves (10) are formed in the shaft wall of the positioning shaft (1), and the tensioning grooves (10) are arranged in a pairwise opposite manner; the tensioning grooves (10) are internally provided with tensioning blocks (2), and springs (3) for pushing the tensioning blocks (2) out of the positioning shaft (1) are arranged between the tensioning blocks (2) arranged in the two tensioning grooves (10) which are oppositely arranged; the tensioning block (2) can slide along the wall of the tensioning groove (10), and when the tensioning block (2) slides to the outermost side, the surface of the tensioning block (2) protrudes out of the outer surface of the positioning shaft (1); a pressing groove (50) is arranged above the tensioning groove (10), a pressing shaft (51) is arranged in the pressing groove (50), a pressing spring (5) is arranged on the pressing shaft (51) in a relatively rotatable manner, one end of the pressing spring (5) is sleeved on the pressing shaft (51), the other end of the pressing spring (5) extends downwards into the tensioning groove (10), and a pressing part (59) protruding out of the surface of the positioning shaft (1) is arranged in the middle of the pressing spring (5).
2. The rough milling, positioning and pressing device for the large box body as claimed in claim 1, wherein the pressing spring (5) is provided with a pressing linkage portion (58) at the other side opposite to the pressing portion (59), and the pressing linkage portion (58) is fixedly connected with the tension block (2) arranged in the tension groove (10) at the opposite side.
3. The rough milling positioning and compressing device for the large box body as claimed in claim 2, wherein a limiting portion (20) which is abutted against the inner wall of the positioning shaft (1) is arranged on the tension block (2), a thrust groove (21) is arranged on the limiting portion (20), two ends of the spring (3) are respectively arranged in the thrust grooves (21) of the tension block (2) which are oppositely arranged, a spring pressing plate (22) is further arranged above the thrust grooves (21), a clamping hole is arranged on the spring pressing plate (22), a bending end (581) is arranged at the end of the compression linkage portion (58), and the bending end (581) is clamped into the clamping hole arranged on the spring pressing plate (22).
4. The rough milling, positioning and pressing device for the large box body according to any one of claims 1 to 3, wherein the upper end and the lower end of the outer surface of the tension block (2) are respectively provided with a guide inclined surface (29), and one end of the pressing spring (5) extending downwards into the tension groove (10) is inserted into an inward concave space formed by the guide inclined surfaces (29).
5. The rough milling, positioning and pressing device for the large box body according to any one of claims 1 to 3, characterized in that a retreat groove (60) for communicating the pressing groove (50) and the tension groove (10) is arranged on the shaft wall of the positioning shaft (1) between the pressing groove (50) and the tension groove (10).
6. The rough milling, positioning and pressing device for the large box body according to claim 5, wherein a retreating chamfer (61) is arranged on the shaft wall of the positioning shaft (1) at the top of the retreating groove (60).
7. The rough milling positioning and pressing device for the large box body according to any one of claims 1 to 3, characterized in that the pressing shaft (51) is fixedly arranged in a shaft hole arranged on the shaft wall of the positioning shaft (1) at the pressing groove (50) through interference fit, and the pressing shaft (51) penetrates through the pressing groove (50).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920708278.2U CN210232261U (en) | 2019-05-16 | 2019-05-16 | Large-scale box rough milling positioning and pressing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920708278.2U CN210232261U (en) | 2019-05-16 | 2019-05-16 | Large-scale box rough milling positioning and pressing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210232261U true CN210232261U (en) | 2020-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920708278.2U Active CN210232261U (en) | 2019-05-16 | 2019-05-16 | Large-scale box rough milling positioning and pressing device |
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|---|---|
| CN (1) | CN210232261U (en) |
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2019
- 2019-05-16 CN CN201920708278.2U patent/CN210232261U/en active Active
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