Clamp for horizontal machining center

Abstract

The invention provides a clamp for a horizontal machining center, and belongs to the technical field of clamps. The problem that an existing horizontal machining center cannot machine the top face of a workpiece is solved. The positioning device comprises a reference positioning seat arranged on a machine tool workbench and a workpiece fixing plate used for fixing a workpiece, the workpiece fixing plate is provided with a positioning key set, the reference positioning seat is provided with at least two positioning hole sets used for being matched with the positioning key set, and the workpiece is provided with a plurality of machining positions. Each machining position corresponds to a machining face or a machining axis, and when any positioning hole set is matched with the positioning key set for positioning, the machining face corresponding to the positioning hole set is perpendicular to the axis of the machine tool spindle. The device has the advantages that the workpiece fixing plate is inserted and pulled out, rotation reversing is carried out on the horizontal reference positioning face, and machining of all the other faces except for the workpiece mounting face and the top face is completed.

Description

Technical Field

[0001] The invention belongs to the technical field of clamps and relates to a clamp for a horizontal machining center. Background Art

[0002] The existing horizontal machining center includes a spindle and a worktable. The spindle has a spindle direction Z, which is parallel to the worktable. When machining a workpiece with such a horizontal machining center, the workpiece can be fixed on a rotatable worktable, the tool is mounted on the spindle, and the workpiece is machined along the spindle direction Z. After the workpiece is clamped once, the machining of all surfaces except the workpiece mounting surface and the top surface can be completed.

[0003] The disadvantage of this type of horizontal machining center is that it cannot process the top surface of the workpiece. However, there are often workpieces that need to be processed on five sides, and the holes on the top surface need to have relative position requirements with the surrounding holes, so expensive pentahedron processing machines are required. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems existing in the existing horizontal machining centers and to propose a horizontal machining center capable of machining the top surface of a workpiece.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A clamp for a horizontal machining center, characterized in that it includes a reference positioning seat arranged on a machine tool worktable and a workpiece fixing plate for fixing a workpiece, a positioning key group is provided on the workpiece fixing plate, the positioning key group includes at least one positioning key, and at least two positioning hole groups for cooperating with the positioning key group are provided on the reference positioning seat, the positioning hole group includes at least one positioning hole, the positioning key is inserted into the positioning hole to form a match, and the number of positioning keys in the positioning key group is the same as the number of positioning holes in the positioning hole group.

[0007] In the above-mentioned fixture for a horizontal machining center, when the positioning key group includes only one positioning key, the cross-section of the positioning key is non-circular, and the workpiece fixing plate is also provided with a fitting positioning surface perpendicular to the insertion direction of the positioning key, and the reference positioning seat is provided with at least two reference positioning surfaces for abutting the fitting positioning surface, and the planes where any two reference positioning surfaces are located are perpendicular or cross-non-perpendicular, and each positioning hole group corresponds to one of the above-mentioned reference positioning surfaces, and the axis of the positioning hole in the positioning hole group is perpendicular to the corresponding reference positioning surface.

[0008] In the above-mentioned fixture for a horizontal machining center, a number of machining positions are provided on the workpiece, each machining position corresponds to a machining surface or a machining axis, and the positioning hole groups correspond to the machining positions one by one. When any positioning hole group is positioned in cooperation with the positioning key group, the above-mentioned fitting positioning surface can be abutted against the reference positioning surface corresponding to the positioning hole group, and at this time, the machining surface corresponding to the positioning hole group is perpendicular to the axis of the machine tool spindle or the machining axis corresponding to the positioning hole group coincides with the axis of the machine tool spindle.

[0009] In the above-mentioned fixture for a horizontal machining center, the positioning key group includes only one positioning key, and the cross section of the positioning key is a regular polygon.

[0010] In the above-mentioned fixture for a horizontal machining center, the positioning key group includes two positioning keys, the positioning hole group includes two positioning holes, the two positioning holes are divided into a reference positioning hole and a reversing positioning hole, the reference positioning hole of the positioning hole group located on the same reference positioning surface is the same, and the reversing positioning holes located on the same reference positioning surface are arranged in sequence along the circumferential direction of the corresponding reference positioning hole.

[0011] In the above-mentioned fixture for a horizontal machining center, the positioning hole and the positioning key are interference fit, and a plurality of inclined grooves are opened on the contact profile of at least one of the parts, and an inclined cantilever is formed between the two inclined grooves; when the two are matched, the cantilever produces elastic deformation to make the positioning hole and the positioning key fit tightly.

[0012] In the above-mentioned fixture for a horizontal machining center, the inclined grooves are evenly distributed on the contact contour.

[0013] In the above-mentioned fixture for a horizontal machining center, when the contact contour is set in a square shape, the contact contour includes two pairs of corresponding edges set opposite to each other, and the inclination directions of the inclined grooves of the corresponding edges set opposite to each other are mirror-symmetrical; the four corner areas of the contact contour are all cut off to eliminate the plastic deformation zone.

[0014] In the above-mentioned fixture for a horizontal machining center, the inclined groove is processed by wire cutting, laser cutting, water jet cutting, etc.

[0015] In the above-mentioned fixture for a horizontal machining center, the angle between the inclined direction of the inclined groove and the normal direction of the contact profile at the inclined groove is 30-60°.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. When in use, fix the workpiece on the workpiece fixing plate, which is plugged and fixed with the reference positioning seat. The workpiece fixing plate is fixed on the horizontal reference positioning surface on the reference positioning seat. By plugging and unplugging the workpiece fixing plate, the workpiece fixing plate is rotated and reversed on the horizontal reference positioning surface to complete the processing of all surfaces except the workpiece installation surface and the top surface;

[0018] 2. When the top surface needs to be processed, fix the workpiece fixing plate on the vertical reference positioning surface for processing;

[0019] 3. When it is necessary to process an inclined surface or an inclined hole, replace the reference positioning seat. The angle between the two reference positioning surfaces of the reference positioning seat corresponds to the angle of the inclined surface. Fix the workpiece fixing plate on the inclined reference positioning seat for processing;

[0020] 4. By opening an oblique groove on the contact profile of the locating hole or the locating key, when the locating key and the locating hole are in interference fit, the cantilever can provide elastic deformation to replace the plastic deformation, thereby improving the positioning accuracy and reducing the machining accuracy of the locating key and the locating hole, thereby improving work efficiency and simplifying the work process;

[0021] 5. Use ordinary horizontal machining machine tools instead of expensive pentahedron machining centers. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a processing schematic diagram of two positioning keys of the present invention;

[0023] Figure 2 It is a schematic diagram of two positioning keys of the present invention being used for processing an inclined surface;

[0024] Figure 3 It is a schematic diagram of a workpiece fixing plate and a reference positioning seat of two positioning keys of the present invention;

[0025] Figure 4 It is a processing schematic diagram of a positioning key of the present invention;

[0026] Figure 5 It is a schematic diagram of a positioning key of the present invention used for processing an inclined surface;

[0027] Figure 6 It is an enlarged schematic diagram of the square positioning hole of the present invention.

[0028] In the figure, 1, workbench; 2, spindle; 3, workpiece; 4, reference positioning seat; 5, workpiece fixing plate; 6, positioning key; 7, positioning hole; 8, fitting positioning surface; 9, reference positioning surface; 10, reference positioning hole; 11, reversing positioning hole; 12, inclined slot; 13, cantilever. DETAILED DESCRIPTION

[0029] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0030] The clamp for a horizontal machining center described in the present invention includes a reference positioning seat 4 arranged on a machine tool worktable 1, and a workpiece fixing plate 5 for fixing a workpiece 3, wherein a positioning key group is provided on the workpiece fixing plate 5, and the positioning key group includes at least one positioning key 6, and at least two positioning hole groups for cooperating with the positioning key group are provided on the reference positioning seat 4, and the positioning hole group includes at least one positioning hole 7, and the positioning key 6 is inserted into the positioning hole 7 to form a match, and the number of the positioning keys 6 of the positioning key group is the same as the number of the positioning holes 7 of the positioning hole group.

[0031] When the positioning key group includes only one positioning key 6, the cross-section of the positioning key 6 is non-circular, and the workpiece fixing plate 5 is also provided with a fitting positioning surface 8 which is perpendicular to the insertion direction of the positioning key 6. The reference positioning seat 4 is provided with at least two reference positioning surfaces 9 for abutting against the fitting positioning surface 8. The planes where any two reference positioning surfaces 9 are located are perpendicular or cross-non-perpendicular, and each positioning hole group corresponds to one of the above-mentioned reference positioning surfaces 9, and the axis of the positioning hole 7 in the positioning hole group is perpendicular to the corresponding reference positioning surface 9.

[0032] A number of machining positions are provided on the workpiece 3, each of which corresponds to a machining surface or a machining axis. The positioning hole groups correspond one-to-one to the machining positions. When any positioning hole group is positioned in coordination with the positioning key group, the above-mentioned fitting positioning surface 8 can be abutted against the reference positioning surface 9 corresponding to the positioning hole group, and at this time, the machining surface corresponding to the positioning hole group is perpendicular to the axis of the machine tool spindle 2 or the machining axis corresponding to the positioning hole group coincides with the axis of the machine tool spindle 2.

[0033] like Figure 4 and Figure 5 As shown, the positioning key group includes only one positioning key 6, and the cross section of the positioning key 6 is a triangle, a rectangle, or a regular polygon.

[0034] like Figures 1 to 3 As shown, the positioning key group includes two positioning keys 6, the positioning hole group includes two positioning holes 7, the two positioning holes 7 are divided into a reference positioning hole 10 and a reversing positioning hole 11, the reference positioning hole 10 of the positioning hole group located on the same reference positioning surface 9 is the same, and the reversing positioning holes 11 located on the same reference positioning surface 9 are arranged in sequence along the circumferential direction of the corresponding reference positioning hole 10.

[0035] When in use, the workpiece 3 is fixed on the workpiece fixing plate 5, the workpiece fixing plate 5 is plugged and fixed with the reference positioning seat 4, and the workpiece fixing plate 5 is fixed on the horizontal reference positioning surface 9 on the reference positioning seat 4. By plugging and unplugging the workpiece fixing plate 5, the horizontal reference positioning surface 9 is rotated and reversed to complete the processing of all surfaces except the installation surface and the top surface of the workpiece 3. When the top surface needs to be processed, the workpiece fixing plate 5 is fixed on the vertical reference positioning surface 9 for processing; Figure 2 and Figure 5 As shown, when it is necessary to process an inclined surface or an inclined hole, the reference positioning seat 4 is replaced, the angle between the two reference positioning surfaces 9 of the reference positioning seat 4 corresponds to the angle of the inclined surface, and the workpiece fixing plate 5 is fixed on the inclined reference positioning seat 4 for processing.

[0036] The rotation reversal of the present invention can be achieved by a positioning key 6, such as Figure 4 As shown, when the cross section of the positioning key 6 is an equilateral triangle, a 120° reversal is performed, and when the cross section of the positioning key 6 is a square, a 90° reversal is performed, and so on. The shape of the positioning key 6 can be changed according to the required rotation angle; it can also be achieved by two positioning keys 6, such as Figure 1 As shown, the workpiece fixing plate 5 is rotated around the reference positioning hole 10 , and the rotation angle of the workpiece fixing plate 5 is determined by the position of the reversing positioning hole 11 .

[0037] like Figure 6 As shown, the positioning hole 7 and the positioning key 6 are interference fit, and at least one of the contact profiles is provided with a plurality of bevel grooves 12, and an inclined cantilever 13 is formed between the two bevel grooves 12; when the two are matched, the cantilever 13 produces elastic deformation to make the positioning hole 7 and the positioning key 6 fit tightly. The bevel grooves 12 are evenly distributed on the contact profile. When the contact profile is set in a square shape, the contact profile includes two pairs of corresponding edges arranged oppositely, and the inclination directions of the bevel grooves 12 of the corresponding edges arranged oppositely are mirror-symmetrical; the four corner areas of the contact profile are all cut off to eliminate the plastic deformation zone. The bevel groove 12 is processed by wire cutting, laser cutting, water jet cutting, etc. The angle between the inclination direction of the bevel groove 12 and the normal direction of the contact profile at the bevel groove 12 is 30-60°.

[0038] It should be understood that in the claims and description of the present invention, all "including..." should be understood as an open-ended meaning, that is, its meaning is equivalent to "at least contains...", and should not be understood as a closed meaning, that is, its meaning should not be understood as "only includes...".

[0039] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A fixture for a horizontal machining center, characterized in that: The invention comprises a reference positioning seat (4) arranged on a machine tool worktable (1), and a workpiece fixing plate (5) for fixing a workpiece (3), wherein the workpiece fixing plate (5) is provided with a positioning key group, wherein the positioning key group includes at least one positioning key (6), and the reference positioning seat (4) is provided with at least two positioning hole groups for cooperating with the positioning key group, wherein the positioning hole group includes at least one positioning hole (7), and the positioning key (6) is inserted into the positioning hole (7) to form a match, and the number of the positioning keys (6) of the positioning key group is the same as the number of the positioning holes (7) of the positioning hole group. When the positioning key group includes only one positioning key (6), the cross section of the positioning key (6) is non-circular, and the workpiece fixing plate (5) is also provided with a fitting positioning surface (8) perpendicular to the insertion direction of the positioning key (6), and the reference positioning seat (4) is provided with a positioning hole group (7) having a positioning key (6) and a positioning hole group (7). At least two reference positioning surfaces (9) are provided for the fitting positioning surface (8) to abut against, the planes where any two reference positioning surfaces (9) are located are perpendicular or intersecting and non-perpendicular, each positioning hole group corresponds to one of the above-mentioned reference positioning surfaces (9), and the axis of the positioning hole (7) in the positioning hole group is perpendicular to the corresponding reference positioning surface (9), a plurality of processing positions are provided on the workpiece (3), each processing position corresponds to a processing surface or a processing axis, the positioning hole groups and the processing positions correspond one to one, when any positioning hole group is positioned in coordination with the positioning key group, the fitting positioning surface (8) can abut against the reference positioning surface (9) corresponding to the positioning hole group, and at this time, the processing surface corresponding to the positioning hole group is perpendicular to the axis of the machine tool spindle (2) or the processing axis corresponding to the positioning hole group coincides with the axis of the machine tool spindle (2).

2. A fixture for a horizontal machining center according to claim 1, characterized in that: The positioning key group comprises only one positioning key (6), and the cross section of the positioning key (6) is a triangle, a rectangle or a regular polygon.

3. The fixture for a horizontal machining center according to claim 1, characterized in that: The positioning key group comprises two positioning keys (6), the positioning hole group comprises two positioning holes (7), the two positioning holes (7) are divided into a reference positioning hole (10) and a reversing positioning hole (11), the reference positioning hole (10) of the positioning hole group located on the same reference positioning surface (9) is the same, and the reversing positioning holes (11) located on the same reference positioning surface (9) are arranged in sequence and spaced apart along the circumferential direction of the corresponding reference positioning hole (10).

4. The fixture for a horizontal machining center according to claim 1, characterized in that: The positioning hole (7) and the positioning key (6) are interference-fitted, and a plurality of inclined grooves (12) are provided on the contact profile of at least one of the parts, and an inclined cantilever (13) is formed between two inclined grooves (12); when the two are fitted, the cantilever (13) generates elastic deformation so that the positioning hole (7) and the positioning key (6) are tightly fitted.

5. A fixture for a horizontal machining center according to claim 4, characterized in that: The inclined grooves (12) are evenly distributed on the contact profile.

6. The fixture for a horizontal machining center according to claim 4, characterized in that: When the contact profile is arranged in a square shape, the contact profile comprises two pairs of corresponding edges arranged opposite to each other, and the inclination directions of the inclined grooves (12) of the corresponding edges arranged opposite to each other are mirror-symmetrical; the four corner areas of the contact profile are all cut off to eliminate the plastic deformation area.

7. A fixture for a horizontal machining center according to claim 4, characterized in that: The angle between the inclined direction of the inclined groove (12) and the normal direction of the contact profile at the inclined groove (12) is 30-60°.

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