CN213795597U - Mandrel for cylindrical grinding machine - Google Patents
Mandrel for cylindrical grinding machine Download PDFInfo
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- CN213795597U CN213795597U CN202022587030.0U CN202022587030U CN213795597U CN 213795597 U CN213795597 U CN 213795597U CN 202022587030 U CN202022587030 U CN 202022587030U CN 213795597 U CN213795597 U CN 213795597U
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- cylindrical section
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Abstract
The utility model discloses a dabber for cylindrical grinder includes first cylinder section, cone section and second cylinder section, first apex hole has been seted up to the front end of first cylinder section, a plurality of axial grooves have been seted up to the front portion, the rear end of first cylinder section is connected with the narrow footpath end of cone section, the wide footpath end of cone section is connected with the front end of second cylinder section, second apex hole has been seted up to the rear end of second cylinder section, the external diameter of the narrow footpath end of cone section and wide footpath end is the same with the external diameter of first cylinder section and second cylinder section respectively, record the external diameter of first cylinder section and second cylinder section into D1 and D2 respectively, record the length of a plurality of axial grooves, first cylinder section and cone section into L1 respectively, L2 and L3, the hole diameter and the length of the hollow workpiece who will treat to process are recorded into D0 and L0 respectively, each size satisfies: d1 is slightly smaller than D0, D0 < D2, (L2+ L3-L1) < L0. The mandrel can realize firm positioning and clamping of the hollow workpiece and greatly improve the form and position precision and the size precision of the hollow workpiece.
Description
Technical Field
The utility model relates to a cylindrical grinder is with accessory specifically is a mandrel for cylindrical grinder.
Background
When the cylindrical grinding machine is used for processing hollow shaft sleeves and other workpieces with long lengths and high precision, a mandrel is required to be used for positioning and clamping the workpieces, the workpieces are sleeved and fixed on the mandrel, and the two ends of the mandrel are propped against the two ends of the mandrel through the double ejector pins, so that the cylindrical grinding of the workpieces is completed.
The traditional mandrel adopts a taper mandrel with a long length and a taper of 1:2000, the mandrel is inserted into a hollow workpiece, the workpiece is forcibly knocked down, the workpiece is fixed on the mandrel by the taper of the mandrel, then the mandrel is arranged in a grinding machine, two ejector pins of the grinding machine are used for propping against two ends of the mandrel, and then the workpiece is subjected to cylindrical grinding. The precision of the excircle of the workpiece positioned and clamped by the mandrel changes along with the precision of the inner diameter of the workpiece, the requirement on the precision of the inner diameter of the workpiece is high, the concentricity and the verticality of the workpiece obtained after the excircle is ground are not ideal enough, the mounting and dismounting operations before and after the workpiece is processed are very troublesome, the workpiece needs to be knocked by means of tools, the labor intensity of workers is increased, and meanwhile, the mounting and dismounting efficiency is low. In addition, the workpiece is fixed on the mandrel by the taper of the mandrel, the inner circle of the workpiece is in surface contact with the mandrel, the outer circle of the mandrel is abraded quickly, the service life is short, and the workpiece needs to be replaced frequently.
Disclosure of Invention
The utility model aims to solve the technical problem that, to prior art not enough, provide a dabber for cylindrical grinder, this dabber can realize the firm location and the clamping of hollow workpiece and improve hollow workpiece's form and position precision and size precision by a wide margin.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: a mandrel for a cylindrical grinding machine comprises a first cylindrical section, a conical section and a second cylindrical section which are sequentially arranged along the axial direction of the mandrel, wherein a first tip hole is formed in the front end of the first cylindrical section, a plurality of axial grooves are formed in the front portion of the first cylindrical section, the rear end of the first cylindrical section is connected with the narrow diameter end of the conical section, the wide diameter end of the conical section is connected with the front end of the second cylindrical section, a second tip hole is formed in the rear end of the second cylindrical section, the outer diameter of the narrow diameter end of the conical section is the same as that of the first cylindrical section, the outer diameter of the wide diameter end of the conical section is the same as that of the second cylindrical section, the outer diameters of the first cylindrical section and the second cylindrical section are respectively marked as D1 and D2, and the lengths of the plurality of axial grooves, the first cylindrical section and the conical section are respectively marked as L1, L2 and L3, the bore diameter and the length of the inner bore of the hollow workpiece to be processed are respectively recorded as D0 and L0, and the dimensions meet the following conditions: d1 is slightly smaller than D0, D0 < D2, (L2+ L3-L1) < L0.
The utility model discloses improve traditional for cylindrical grinder dabber, divide into the three-section with the dabber, first cylinder section, cone section and second cylinder section promptly to set up a plurality of axial grooves in first cylinder section, make first cylinder section radially have elasticity rise and shrink function, realize the firm location and the clamping to hollow workpiece.
Use the utility model discloses during cylindrical grinder is with hollow work piece of dabber location clamping, only need with hollow work piece cover in first cylinder section, the tapering that utilizes the cone section withstands hollow work piece's one end and fixes a position, then pack into the grinding machine with the dabber, first apex hole and second apex hole are gone into in top respectively through the two thimbles of grinding machine, make first cylinder section produce certain elastic deformation and form radial power of rising, rise through the power of rising and rise and fix hollow work piece's the other end, accomplish hollow work piece's clamping work promptly. After the cylindrical grinding of the hollow workpiece is finished, the hollow workpiece can be easily taken down from the mandrel only by taking out the mandrel and naturally contracting the first cylindrical section.
Use the utility model discloses during the hollow work piece of core shaft location clamping for the cylindrical grinder, need not rely on the internal diameter of hollow work piece to fix a position, can improve the form and position precision and the size precision of hollow work piece by a wide margin. When workers clamp and disassemble, the hollow workpieces do not need to be knocked by other tools, so that the labor intensity of the workers is greatly reduced, and the production efficiency is improved. Furthermore, the utility model discloses an improved design has prolonged the life of dabber, does not have the wearing and tearing of dabber excircle, as long as not inciting somebody to action the damage can use forever, the manufacturing cost of reducible dabber.
Preferably, two axial grooves are formed in the front of the first cylindrical section and are arranged in a 90-degree cross mode, so that the first cylindrical section can be elastically deformed uniformly in the radial direction during clamping, the hollow workpiece is stressed uniformly, and a better positioning and clamping effect is achieved.
Preferably, D1 is 0.01-0.02 mm smaller than D0, so that elastic deformation of the first cylindrical section during clamping is facilitated, and the expansion force of the first cylindrical section on the hollow workpiece is guaranteed to meet the clamping requirement.
Preferably, the taper of the conical section is 1: 50. The larger taper is beneficial to reducing the contact area of the first cylindrical section and the hollow workpiece during clamping, and the hollow workpiece is conveniently and smoothly taken down from the mandrel after the processing is finished.
Preferably, D0 is smaller than D2 by 0.1-0.3 mm, so that the hollow workpiece cannot move to the second cylindrical section after being clamped.
Preferably, the hollow workpiece to be processed is a hollow shaft sleeve. In practical application, besides the hollow shaft sleeve, the mandrel can also be used for positioning and clamping other hollow workpieces on an external circular grinding machine.
Compared with the prior art, the utility model has the advantages of as follows: the utility model discloses improve traditional for cylindrical grinder dabber, divide into the three-section with the dabber, first cylinder section, cone section and second cylinder section promptly to set up a plurality of axial grooves in first cylinder section, make first cylinder section radially have elasticity rise and shrink function, realize the firm location and the clamping to hollow workpiece. Use the utility model discloses during the hollow work piece of core shaft location clamping for the cylindrical grinder, need not rely on the internal diameter of hollow work piece to fix a position, can improve the form and position precision and the size precision of hollow work piece by a wide margin. When workers clamp and disassemble, the hollow workpieces do not need to be knocked by other tools, so that the labor intensity of the workers is greatly reduced, and the production efficiency is improved. Furthermore, the utility model discloses an improved design has prolonged the life of dabber, does not have the wearing and tearing of dabber excircle, as long as not inciting somebody to action the damage can use forever, the manufacturing cost of reducible dabber.
Drawings
FIG. 1 is an external view of a mandrel for a cylindrical grinding machine in an embodiment;
fig. 2 is an enlarged side view of the mandrel for a cylindrical grinding machine in the embodiment.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
The mandrel for the cylindrical grinding machine in embodiment 1, as shown in fig. 1 and 2, includes a first cylindrical section 1, a conical section 2, and a second cylindrical section 3 that are sequentially arranged along an axial direction of the mandrel, a first apex hole 11 is formed at a front end of the first cylindrical section 1, two axial grooves 12 are formed at a front portion of the first cylindrical section 1, the two axial grooves 12 are arranged in a 90-degree cross manner, a taper of the conical section 2 is 1:50, a rear end of the first cylindrical section 1 is connected to a narrow diameter end of the conical section 2, a wide diameter end of the conical section 2 is connected to a front end of the second cylindrical section 3, a second apex hole 31 is formed at a rear end of the second cylindrical section 3, an outer diameter of the narrow diameter end of the conical section 2 is the same as an outer diameter of the first cylindrical section 1, an outer diameter of the wide diameter end of the conical section 2 is the same as an outer diameter of the second cylindrical section 3, outer diameters of the first cylindrical section 1 and the second cylindrical section 3 are respectively denoted as D1 and D2, and the two axial grooves 12 are formed at a same diameter, The lengths of the first cylindrical section 1 and the conical section 2 are respectively recorded as L1, L2 and L3, the bore diameter and the length of an inner hole of a hollow workpiece to be machined are respectively recorded as D0 and L0, and the dimensions meet the following requirements: d1 was 0.01mm smaller than D0, D0 was 0.2mm smaller than D2, (L2+ L3-L1) < L0.
In embodiment 1, the hollow workpiece to be processed is a hollow shaft sleeve (not shown in the figure).
The mandrel for a cylindrical grinding machine of example 2 is different from that of example 1 in that in example 2, D1 is 0.02mm smaller than D0, and D0 is 0.25 mm smaller than D2.
When the mandrel is used for positioning and clamping the hollow shaft sleeve, the hollow shaft sleeve is only required to be sleeved on the first cylindrical section 1, one end of the hollow shaft sleeve is jacked and positioned by the taper of the conical section 2, then the mandrel is arranged in the grinding machine, the tops of the double thimbles of the grinding machine are jacked into the first top hole 11 and the second top hole 31 respectively, so that the first cylindrical section 1 generates certain elastic deformation and forms radial expansion force, the other end of the hollow shaft sleeve is tensioned and fixed by the expansion force, and the clamping work of the hollow shaft sleeve is completed. After the cylindrical grinding processing of the hollow shaft sleeve is completed, the mandrel is only required to be taken out, and the first cylindrical section 1 naturally contracts, so that the hollow shaft sleeve can be easily taken down from the mandrel.
Claims (6)
1. A mandrel for a cylindrical grinding machine is characterized by comprising a first cylindrical section, a conical section and a second cylindrical section which are sequentially arranged along the axial direction of the mandrel, wherein a first tip hole is formed in the front end of the first cylindrical section, a plurality of axial grooves are formed in the front portion of the first cylindrical section, the rear end of the first cylindrical section is connected with the narrow diameter end of the conical section, the wide diameter end of the conical section is connected with the front end of the second cylindrical section, a second tip hole is formed in the rear end of the second cylindrical section, the outer diameter of the narrow diameter end of the conical section is the same as that of the first cylindrical section, the outer diameter of the wide diameter end of the conical section is the same as that of the second cylindrical section, the outer diameters of the first cylindrical section and the second cylindrical section are respectively marked as D1 and D2, and the lengths of the axial grooves, the first cylindrical section and the conical section are respectively marked as L1, L2 and L3, the bore diameter and the length of the inner bore of the hollow workpiece to be processed are respectively recorded as D0 and L0, and the dimensions meet the following conditions: d1 is slightly smaller than D0, D0 < D2, (L2+ L3-L1) < L0.
2. The mandrel for the cylindrical grinding machine as claimed in claim 1, wherein the front portion of the first cylindrical section is provided with two axial grooves, and the two axial grooves are arranged in a 90-degree criss-cross manner.
3. The mandrel for a cylindrical grinding machine according to claim 1, wherein D1 is smaller than D0 by 0.01 to 0.02 mm.
4. The mandrel for a cylindrical grinding machine according to claim 1, wherein the taper of the conical section is 1: 50.
5. The mandrel for a cylindrical grinding machine according to claim 1, wherein D0 is smaller than D2 by 0.1 to 0.3 mm.
6. The mandrel for a cylindrical grinding machine according to claim 1, wherein said hollow workpiece to be machined is a hollow sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022587030.0U CN213795597U (en) | 2020-11-10 | 2020-11-10 | Mandrel for cylindrical grinding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022587030.0U CN213795597U (en) | 2020-11-10 | 2020-11-10 | Mandrel for cylindrical grinding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213795597U true CN213795597U (en) | 2021-07-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022587030.0U Active CN213795597U (en) | 2020-11-10 | 2020-11-10 | Mandrel for cylindrical grinding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213795597U (en) |
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2020
- 2020-11-10 CN CN202022587030.0U patent/CN213795597U/en active Active
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