A double-station finishing equipment for gear pump tooth cavity

Abstract

The present invention discloses a double-station finishing equipment for a gear pump tooth cavity, comprising a machine tool body, the machine tool body being provided with a tool clamping mechanism, the tool clamping mechanism clamping a gear pump housing to be processed; the gear pump housing comprising a first tooth cavity and a second tooth cavity; a first fine boring mechanism being provided at one end of the machine tool body, the first fine boring mechanism processing the first tooth cavity; a second fine boring mechanism being provided at the other end of the machine tool body, the second fine boring mechanism processing the second tooth cavity; a slide rail being provided between the first fine boring mechanism and the second fine boring mechanism, the first spindle and the second spindle being parallel to the slide rail; the slide rail being slidably connected to a first slide, the tool clamping mechanism being fixedly provided on the first slide. The beneficial effects of this solution can be known from the description of the above solution, that is, the structure is simple and the design is reasonable, which not only reduces the workload and improves the processing efficiency, but also ensures that the angles of the axis centers of the two tooth cavities are accurate, and ensures that the distance between the axis centers of the two tooth cavities meets the design requirements.

Description

Technical Field

[0001] The invention relates to the field of gear pump manufacturing, in particular to a double-station finishing device for a gear pump tooth cavity. Background Art

[0002] External gear pumps have two tooth cavities, and the distance between them is crucial, determining the meshing clearance between the two gears. In traditional machining processes, the two tooth cavities are machined separately. Since the two tooth cavities are positioned separately during machining, while the second positioning is based on the first, there is always an error between the two positionings, and the second positioning is quite demanding. Furthermore, in traditional machining, the workpiece is fixed and the boring bar is fed axially. The two tooth cavities of the external gear pump are connected on their sides, resulting in an unbalanced radial force on the boring bar. Because the boring bar is a long rod, the radial torque it experiences changes as it extends and contracts, affecting the axis of the tooth cavity in the finished product. For these reasons, during traditional machining processes, large errors in the tooth cavity distance often lead to problems such as excessive gear backlash or out-of-tolerance. This can result in oil pump pressure failure or a shortened oil pump life. Summary of the Invention

[0003] The present invention addresses the deficiencies in the prior art and provides a dual-station finishing device for the tooth cavity of a gear pump with a simple structure and reasonable design. The device not only reduces workload and improves processing efficiency, but also ensures that the angles of the two tooth cavity axis lines are accurate and that the distance between the two tooth cavity axis lines meets design requirements.

[0004] In order to achieve the above-mentioned object, the present invention provides a double-station finishing equipment for a gear pump tooth cavity, comprising a machine tool body, wherein the machine tool body is provided with a tool clamping mechanism, and the tool clamping mechanism clamps a gear pump housing to be processed;

[0005] The gear pump housing includes a first tooth cavity and a second tooth cavity, and the first tooth cavity and the second tooth cavity are connected to each other at side surfaces;

[0006] A first fine boring mechanism is provided at one end of the machine tool body, the first fine boring mechanism processes the first tooth cavity, the first fine boring mechanism includes a first spindle box, and the first spindle box is dynamically connected to a first spindle;

[0007] A second fine boring mechanism is provided at the other end of the machine tool body, and the second fine boring mechanism processes the second tooth cavity. The second fine boring mechanism includes a second spindle box, and the second spindle box is dynamically connected to a second spindle.

[0008] The machine tool body is provided with a slide rail between the first fine boring mechanism and the second fine boring mechanism, and the first spindle and the second spindle are parallel to the slide rail;

[0009] The slide rail is slidably connected to a first slide platform, and the tooling clamping mechanism is fixedly arranged on the first slide platform;

[0010] The second fine boring mechanism further comprises a driven shaft box, the slide rail is slidably connected to a second slide, the second slide is located between the first slide and the second spindle box, the second slide is provided with a driven shaft box, and the driven shaft box is rotatably connected to a driven shaft;

[0011] During operation, the second slide is fixed, and the second main shaft is drivingly connected to the driven shaft;

[0012] The ends of the first main shaft and the driven shaft are provided with a boring tool structure, and the distance between the axis center lines of the first main shaft and the driven shaft is equal to a first set value, and the first set value is the set distance between the center lines of the first tooth cavity and the second tooth cavity;

[0013] The first spindle has only rotational freedom relative to the first spindle box;

[0014] The driven shaft has only a rotational degree of freedom relative to the driven shaft housing.

[0015] Furthermore, the tooling clamping mechanism clamps two gear pump housings, and the two gear pump housings are located at the same height;

[0016] Two first spindle boxes are provided at one end of the machine tool body, and two second spindle boxes are provided at the other end, forming two pairs of the first spindle and the second spindle;

[0017] The two first main axes and the two second main axes are located at the same height;

[0018] The distance between the two first main shafts is a second set value, and the second set value is greater than the length of the gear pump housing.

[0019] Furthermore, the tooling clamping mechanism includes a first gravity seat, which is fixedly arranged on the upper surface of the first slide;

[0020] The first gravity seat includes a first mounting portion, the first mounting portion is bolted to the first slide, and the first mounting portion is connected to a tooling portion;

[0021] The tooling portion is connected to a positioning piece, and the positioning piece is connected to the gear pump housing.

[0022] Furthermore, the tooling portion and the positioning member form a tooling surface, the tooling surface is perpendicular to the first main shaft and the second main shaft, and the gear pump housing is arranged on the tooling surface;

[0023] The side of the tooling part opposite to the tooling surface is an inclined surface, so that the cross section of the tooling part perpendicular to the tooling surface and standing upright is a trapezoid that is narrow at the top and wide at the bottom.

[0024] Furthermore, the tooling portion is provided with a first through hole perpendicular to the tooling surface, and a step is provided at one end of the first through hole close to the tooling surface;

[0025] The positioning member is engaged with the first through hole, and a first extension edge is provided at one end of the positioning member close to the tooling surface, and the first extension edge is engaged with the step;

[0026] The positioning member is connected to the tooling portion by bolts via the first extension edge;

[0027] The positioning member is provided with a second through hole, the tooth cavity of the gear pump housing is communicated with the second through hole, and the projection of the tooth cavity of the gear pump housing perpendicular to the tooling surface can pass through the second through hole without hindrance.

[0028] Furthermore, the positioning member is provided with a positioning pin hole. When the positioning pin passing through the gear pump housing enters the positioning pin hole, the axis of the first main shaft coincides with the axis set by the first tooth cavity, and the axis of the second main shaft coincides with the axis set by the second tooth cavity.

[0029] Furthermore, the first fine boring mechanism further comprises a first spindle box seat, the first spindle box seat is fixedly arranged at one end of the machine tool body, and the first spindle box is fixedly arranged on the first spindle box seat;

[0030] The second fine boring mechanism further includes a second spindle box seat, which is fixedly arranged at the other end of the machine tool body;

[0031] During operation, the second spindle box is fixedly arranged on the second spindle box seat, the tail end of the driven shaft is connected to the second spindle by transmission, and the axis center lines of the second spindle and the driven shaft coincide with each other;

[0032] The second main shaft is spline-connected to the driven shaft.

[0033] Furthermore, the driven shaft box includes a second gravity seat, and the second gravity seat is fixedly arranged on the upper surface of the second slide;

[0034] The second gravity seat includes a second mounting portion, the second mounting portion is bolted to the second slide, and the second mounting portion is connected to a fixed shaft portion;

[0035] The fixed shaft portion is connected to a fixed shaft member, the fixed shaft member is provided with a cylindrical through hole, the cylindrical through hole is provided with a bearing, and the bearing is rotatably connected to the driven shaft;

[0036] The distance between the axis lines of the cylindrical through holes is the second set value.

[0037] Furthermore, the fixed axis portion and the fixed axis member form a mounting surface perpendicular to the first main axis and the second main axis, and a surface of the fixed axis portion opposite to the mounting surface is an inclined surface, so that the vertical cross-section of the fixed axis portion perpendicular to the mounting surface is a trapezoidal shape that is narrow at the top and wide at the bottom;

[0038] The fixed axis portion is provided with a third through hole perpendicular to the mounting surface, and one end of the third through hole close to the mounting surface is provided with a step;

[0039] The fixed shaft member is engaged with the third through hole, and a second extension edge is provided at one end of the fixed shaft member close to the mounting surface, and the second extension edge is engaged with the step;

[0040] When the fixed axis member is engaged with the third through hole, the distance between the axis of the cylindrical through hole and the adjacent axis of the first main shaft is the first set value;

[0041] The fixed shaft member is connected to the fixed shaft portion by bolts via the second extension edge.

[0042] Furthermore, two parallel slide rails are provided between the first spindle box and the second spindle box;

[0043] Two sliding blocks are provided between the two ends of each of the first slide and the second slide and the slide rail.

[0044] Furthermore, the boring tool structure includes the first main shaft or driven shaft end portion, the first main shaft or driven shaft end portion is connected to a boring tool seat, and the boring tool seat is connected to a boring tool;

[0045] The ends of the first main shaft and the driven shaft are provided with concentric steps. The boring tool seat is a cylinder concentric with the first main shaft or the driven shaft. The boring tool seat is provided with a shape matching the concentric steps.

[0046] During operation, the position of the first spindle is determined through adjustment and is fixed to the machine tool body.

[0047] Since the distance between the cylindrical through hole of the fixed shaft member and the adjacent first main shaft axis is a first set value, that is, the set distance between the axis centers of the two gear chambers of the gear pump, the fixed shaft member is selected according to the model of the gear pump.

[0048] The fixed axis member is selected and fixedly connected to the second gravity seat.

[0049] Then, install the gear pump housing on the positioning piece.

[0050] In the present application, the combination of the fixed axis member and the second gravity seat is equivalent to the upper mold, and the combination of the positioning member and the first gravity seat is equivalent to the lower mold, which saves a lot of operations for adjusting the position between the workpiece and the processing tool.

[0051] Moreover, since the accuracy of the machining center is required to be higher than the accuracy of the workpiece in design and manufacturing, it is beneficial to improve the workpiece quality.

[0052] With only rotational freedom between the primary spindle and the driven spindle, the boring tool's operating stability is maximized and the torque transmitted by the boring tool will not change. Two workpieces can be clamped simultaneously on the locating fixture. When the workpiece approaches the primary spindle box at one end of the machine tool, the first tooth cavity is machined simultaneously; when the workpiece approaches the driven spindle box, the second tooth cavity is machined simultaneously. Machining two products simultaneously not only improves machining efficiency, but also, because the spindles are staggered and fixed, the force is applied at two points, namely the fixture clamping mechanism and the slide. This minimizes the accumulation of deflection of the slide relative to the rail caused by a single, long-term, unidirectional torque, thereby ensuring the accuracy of fine boring.

[0053] The beneficial effects of this solution can be seen from the description of the above solution. It has a simple structure and reasonable design. It not only reduces the workload and improves processing efficiency, but also ensures that the angles of the two tooth cavity axis lines are accurate and that the distance between the two tooth cavity axis lines meets the design requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a schematic diagram of the structure of the present invention;

[0055] Figure 2 for Figure 1 Get a top view;

[0056] Figure 3 This is a schematic structural diagram of the tooling clamping mechanism of the present invention;

[0057] Figure 4 This is a schematic structural diagram of the first gravity seat of the present invention;

[0058] Figure 5 This is a schematic diagram of the connection structure between the positioning member and the gear pump housing of the present invention;

[0059] Figure 6 This is a schematic structural diagram of the driven shaft seat of the present invention;

[0060] Figure 7 This is a schematic structural diagram of the second gravity seat of the present invention;

[0061] Figure 8 This is a structural diagram of the fixed axis member of the present invention;

[0062] In the figure, 1, machine tool body; 2, tool clamping mechanism; 3, gear pump housing; 4, first gear chamber; 5, second gear chamber; 6, first fine boring mechanism; 7, first spindle box; 8, first spindle; 9, second fine boring mechanism; 10, first spindle box seat; 11, second spindle box; 12, second spindle; 13, slide rail; 14, first slide; 15, driven shaft box; 16, second slide; 17, driven shaft; 18, boring tool structure; 19, first heavy Force seat; 20, first mounting portion; 21, tooling portion; 22, positioning member; 23, tooling surface; 24, first through hole; 25, first extended edge; 26, second through hole; 27, positioning pin hole; 28, second spindle box seat; 29, second gravity seat; 30, second mounting portion; 31, fixed axis portion; 32, fixed axis member; 33, cylindrical through hole; 34, mounting surface; 35, third through hole; 36, second extended edge; 37, boring tool seat; 38, boring tool. DETAILED DESCRIPTION

[0063] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0064] like Figure 1-8 As shown, this embodiment is a double-station finishing equipment for a gear pump tooth cavity, comprising a machine tool body 1, the machine tool body 1 is provided with a tool clamping mechanism 2, and the tool clamping mechanism 2 clamps a gear pump housing 3 to be processed;

[0065] The gear pump housing 3 includes a first tooth cavity 4 and a second tooth cavity 5, and the first tooth cavity 4 and the second tooth cavity 5 are connected at the side;

[0066] A first fine boring mechanism 6 is provided at one end of the machine tool body 1. The first fine boring mechanism 6 processes the first tooth cavity 4. The first fine boring mechanism 6 includes a first spindle box 7. The first spindle box 7 is dynamically connected to a first spindle 8.

[0067] A second fine boring mechanism 9 is provided at the other end of the machine tool body 1. The second fine boring mechanism 9 processes the second tooth cavity 5. The second fine boring mechanism 9 includes a second spindle box 11. The second spindle box 11 is dynamically connected to a second spindle 12.

[0068] The machine tool body 1 is provided with a slide rail 13 between the first fine boring mechanism 6 and the second fine boring mechanism 9. The first spindle 8 and the second spindle 12 are parallel to the slide rail 13.

[0069] The slide rail 13 is slidably connected to a first slide 14 , and the tooling clamping mechanism 2 is fixedly arranged on the first slide 14 ;

[0070] The second fine boring mechanism 6 further includes a driven shaft box 15, a second slide 16 slidably connected to the slide rail 14, the second slide 16 is located between the first slide 14 and the second spindle box 11, the second slide 16 is provided with a driven shaft box 15, and the driven shaft box 15 is rotatably connected to the driven shaft 17;

[0071] During operation, the second slide 16 is fixed, and the second main shaft 12 is in transmission connection with the driven shaft 17;

[0072] A boring tool structure 18 is provided at the end of the first main shaft 8 and the driven shaft 17. The distance between the axis center lines of the first main shaft 8 and the driven shaft 17 is equal to a first set value, which is the set distance between the center lines of the first tooth chamber 4 and the second tooth chamber 5.

[0073] The first spindle 8 has only rotational freedom relative to the first spindle box 7;

[0074] The driven shaft 17 has only a rotational freedom relative to the driven shaft housing 15 .

[0075] Furthermore, the tooling clamping mechanism 2 clamps two gear pump housings 3, and the two gear pump housings 3 are located at the same height;

[0076] Two first spindle boxes 7 are provided at one end of the machine tool body 1, and two second spindle boxes 11 are provided at the other end, forming two pairs of first spindles 8 and second spindles 12;

[0077] The two first main shafts 8 and the two second main shafts 12 are located at the same height;

[0078] The distance between the two first main shafts 8 is a second set value, which is greater than the length of the gear pump housing 3 .

[0079] Furthermore, the tooling clamping mechanism 2 includes a first gravity seat 19 , which is fixedly disposed on the upper surface of the first slide 14 ;

[0080] The first gravity seat 19 includes a first mounting portion 20 , the first mounting portion 20 is bolted to the first slide 14 , and the first mounting portion 20 is connected to a tooling portion 21 ;

[0081] The tooling portion 21 is connected to a positioning member 22 , and the positioning member 22 is connected to the gear pump housing 3 .

[0082] Furthermore, the tooling portion 21 and the positioning member 22 form a tooling surface 23 , which is perpendicular to the first main shaft 8 and the second main shaft 17 , and the gear pump housing 3 is disposed on the tooling surface 23 ;

[0083] The side of the tooling portion 21 opposite to the tooling surface 23 is an inclined surface, so that the vertical cross-section of the tooling portion 21 perpendicular to the tooling surface 23 is a trapezoid with a narrow upper portion and a wide lower portion.

[0084] Furthermore, the tooling portion 21 is provided with a first through hole 24 perpendicular to the tooling surface 23 , and a step is provided at one end of the first through hole 24 close to the tooling surface 23 ;

[0085] The positioning member 22 is fitted with the first through hole 24 , and a first extension edge 25 is provided at one end of the positioning member 22 close to the tooling surface 23 , and the first extension edge 25 is fitted with the step;

[0086] The positioning member 22 is bolted to the tooling portion 21 via the first extension edge 25;

[0087] The positioning member 22 is provided with a second through hole 26 , the tooth cavity of the gear pump housing 3 is communicated with the second through hole 26 , and the projection of the tooth cavity of the gear pump housing 3 perpendicular to the tooling surface 23 can pass through the second through hole 26 without hindrance.

[0088] Furthermore, the positioning member 22 is provided with a positioning pin hole 27. When the positioning pin passing through the gear pump housing 3 enters the positioning pin hole 27, the axis of the first main shaft 8 coincides with the axis set by the first tooth chamber 4, and the axis of the second main shaft 12 coincides with the axis set by the second tooth chamber 5.

[0089] Furthermore, the first fine boring mechanism 6 further includes a first spindle box seat 10, the first spindle box seat 10 is fixedly arranged at one end of the machine tool body 1, and the first spindle box 7 is fixedly arranged at the first spindle box seat 10;

[0090] The second fine boring mechanism 9 further includes a second spindle box seat 28, which is fixedly arranged at the other end of the machine tool body 1;

[0091] During operation, the second spindle box 11 is fixed to the second spindle box seat 28, and the tail end of the driven shaft 17 is connected to the second spindle 12 in a transmission manner, and the axis center lines of the second spindle 12 and the driven shaft 17 coincide with each other;

[0092] The second main shaft 12 is spline-connected to the driven shaft 17 .

[0093] Furthermore, the driven shaft box 15 includes a second gravity seat 29, which is fixedly disposed on the upper surface of the second slide 16;

[0094] The second gravity seat 29 includes a second mounting portion 30 , the second mounting portion 30 is bolted to the second slide 16 , and the second mounting portion 30 is connected to a fixed shaft portion 31 ;

[0095] The fixed shaft portion 31 is connected to a fixed shaft member 32 , the fixed shaft member 32 is provided with a cylindrical through hole 33 , the cylindrical through hole 33 is provided with a bearing, and the bearing is rotatably connected to the driven shaft 17 ;

[0096] The distance between the axis lines of the cylindrical through holes 33 is a second set value.

[0097] Furthermore, the fixed shaft portion 31 and the fixed shaft member 32 form a mounting surface 34 perpendicular to the first main shaft 8 and the second main shaft 17. The surface of the fixed shaft portion 31 opposite to the mounting surface 34 is an inclined surface, so that the cross-section of the fixed shaft portion 31 perpendicular to the mounting surface 34 and upright is a trapezoidal shape that is narrow at the top and wide at the bottom.

[0098] The fixed shaft portion 31 is provided with a third through hole 35 perpendicular to the mounting surface 34 , and a step is provided at one end of the third through hole 35 close to the mounting surface 34 ;

[0099] The fixed shaft member 32 is engaged with the third through hole 35 , and a second extension edge 36 is provided on one end of the fixed shaft member 32 close to the mounting surface 34 , and the second extension edge 36 is engaged with the step;

[0100] When the fixed shaft member 32 is aligned with the third through hole 35 , the distance between the axis of the cylindrical through hole 33 and the axis of the adjacent first main shaft 8 is a first set value;

[0101] The fixed shaft member 32 is connected to the fixed shaft portion 31 by bolts via the second extended edge 36 .

[0102] Furthermore, two parallel slide rails 13 are provided between the first spindle box 7 and the second spindle box 11;

[0103] Two sliders are provided between the two ends of each of the first slide 14 and the second slide 16 and the slide rail 13 .

[0104] Furthermore, the boring tool structure 18 includes an end portion of the first main shaft 8 or the driven shaft 17 , the end portion of the first main shaft 8 or the driven shaft 17 is connected to a boring tool seat 37 , and the boring tool seat 37 is connected to a boring tool 38 ;

[0105] Concentric steps are provided at the ends of the first main shaft 8 and the driven shaft 17 . The boring tool seat 37 is a cylinder concentric with the first main shaft 8 or the driven shaft 17 . The boring tool seat 37 is provided with a shape matching the concentric steps.

[0106] During operation, the position of the first spindle 8 is determined through adjustment and is fixed to the machine tool body 1 .

[0107] Since the distance between the cylindrical through hole 33 of the fixed shaft member 32 and the adjacent axis of the first main shaft 8 is the first set value, that is, the axis set distance between the two gear chambers of the gear pump, the fixed shaft member 32 is selected according to the model of the gear pump.

[0108] The fixed axis member 32 is selected and fixedly connected to the second gravity seat 29 .

[0109] Then, the gear pump housing 3 is mounted on the positioning member 22 .

[0110] In this application, the combination of the fixed axis member 32 and the second gravity seat 29 is equivalent to the upper mold, and the combination of the positioning member 22 and the first gravity seat 19 is equivalent to the lower mold, which saves a lot of operations for adjusting the position between the workpiece and the processing tool.

[0111] Moreover, since the accuracy of the machining center is required to be higher than the accuracy of the workpiece in design and manufacturing, it is beneficial to improve the workpiece quality.

[0112] With only rotational freedom between the first spindle 8 and the driven shaft 17, the working stability of the boring cutter 38 is maximized, and the torque transmitted by the boring cutter 38 will not change. Two workpieces are clamped on the positioning member 22 at a time. When the workpiece is close to the first spindle box 7 at one end of the machine tool, the first tooth cavity 4 of the workpiece is processed simultaneously; when the workpiece is close to the driven spindle box 15, the second tooth cavity 5 of the workpiece is processed simultaneously. Processing two products at a time not only improves processing efficiency, but also, because the spindles are staggered and fixed, the tooling clamping mechanism and the slide are subjected to force at two points, which can minimize the accumulation of deflection of the slide relative to the slide rail caused by a single long-term unidirectional torque, thereby ensuring the accuracy of the fine boring process.

[0113] Technical features not described in the present invention can be achieved through or by adopting existing technologies and will not be described in detail here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A double-station finishing equipment for gear pump tooth cavity, characterized in that: The machine tool comprises a main body, wherein the main body is provided with a tool clamping mechanism, and the tool clamping mechanism clamps a gear pump housing processed on behalf of the customer; The gear pump housing includes a first tooth cavity and a second tooth cavity, and the first tooth cavity and the second tooth cavity are connected to each other at side surfaces; A first fine boring mechanism is provided at one end of the machine tool body, the first fine boring mechanism processes the first tooth cavity, the first fine boring mechanism includes a first spindle box, and the first spindle box is dynamically connected to a first spindle; A second fine boring mechanism is provided at the other end of the machine tool body, and the second fine boring mechanism processes the second tooth cavity. The second fine boring mechanism includes a second spindle box, and the second spindle box is dynamically connected to a second spindle. The machine tool body is provided with a slide rail between the first fine boring mechanism and the second fine boring mechanism, and the first spindle and the second spindle are parallel to the slide rail; The slide rail is slidably connected to a first slide platform, and the tooling clamping mechanism is fixedly arranged on the first slide platform; The second fine boring mechanism further comprises a driven shaft box, the slide rail is slidably connected to a second slide, the second slide is located between the first slide and the second spindle box, the second slide is provided with a driven shaft box, and the driven shaft box is rotatably connected to a driven shaft; During operation, the second slide is fixed, and the second main shaft is drivingly connected to the driven shaft; The ends of the first main shaft and the driven shaft are provided with a boring tool structure, and the distance between the axis center lines of the first main shaft and the driven shaft is equal to a first set value, and the first set value is the set distance between the center lines of the first tooth cavity and the second tooth cavity; The first spindle has only rotational freedom relative to the first spindle box; The driven shaft has only a rotational degree of freedom relative to the driven shaft housing.

2. The double-station finishing equipment for gear pump tooth cavity according to claim 1, characterized in that: The tooling clamping mechanism clamps two gear pump housings, and the two gear pump housings are located at the same height; Two first spindle boxes are provided at one end of the machine tool body, and two second spindle boxes are provided at the other end, forming two pairs of the first spindle and the second spindle; The two first main axes and the two second main axes are located at the same height; The distance between the two first main shafts is a second set value, and the second set value is greater than the length of the gear pump housing.

3. The double-station finishing equipment for gear pump tooth cavity according to claim 1, characterized in that: The tool clamping mechanism includes a first gravity seat, which is fixedly arranged on the upper surface of the first slide; The first gravity seat includes a first mounting portion, the first mounting portion is bolted to the first slide, and the first mounting portion is connected to a tooling portion; The tooling portion is connected to a positioning piece, and the positioning piece is connected to the gear pump housing.

4. The double-station finishing equipment for gear pump tooth cavity according to claim 3, characterized in that: The tooling portion and the positioning member form a tooling surface, the tooling surface is perpendicular to the first main shaft and the second main shaft, and the gear pump housing is arranged on the tooling surface; The side of the tooling part opposite to the tooling surface is an inclined surface, so that the cross section of the tooling part perpendicular to the tooling surface and standing upright is a trapezoid that is narrow at the top and wide at the bottom.

5. The double-station finishing equipment for gear pump tooth cavity according to claim 4, characterized in that: The tooling portion is provided with a first through hole perpendicular to the tooling surface, and a step is provided at one end of the first through hole close to the tooling surface; The positioning member is engaged with the first through hole, and a first extension edge is provided at one end of the positioning member close to the tooling surface, and the first extension edge is engaged with the step; The positioning member is connected to the tooling portion by bolts via the first extension edge; The positioning member is provided with a second through hole, the tooth cavity of the gear pump housing is communicated with the second through hole, and the projection of the tooth cavity of the gear pump housing perpendicular to the tooling surface can pass through the second through hole without hindrance.

6. The double-station finishing equipment for gear pump tooth cavity according to claim 3, characterized in that: The positioning member is provided with a positioning pin hole. When the positioning pin passing through the gear pump housing enters the positioning pin hole, the axis centerline of the first main shaft coincides with the axis centerline set by the first tooth cavity, and the axis centerline of the second main shaft coincides with the axis centerline set by the second tooth cavity.

7. The double-station finishing equipment for gear pump tooth cavity according to claim 2, characterized in that: The first fine boring mechanism further includes a first spindle box seat, the first spindle box seat is fixedly arranged at one end of the machine tool body, and the first spindle box is fixedly arranged on the first spindle box seat; The second fine boring mechanism further includes a second spindle box seat, which is fixedly arranged at the other end of the machine tool body; During operation, the second spindle box is fixedly arranged on the second spindle box seat, the tail end of the driven shaft is connected to the second spindle by transmission, and the axis center lines of the second spindle and the driven shaft coincide with each other; The second main shaft is spline-connected to the driven shaft.

8. The double-station finishing equipment for gear pump tooth cavity according to claim 7, characterized in that: The driven shaft box includes a second gravity seat, and the second gravity seat is fixedly arranged on the upper surface of the second slide; The second gravity seat includes a second mounting portion, the second mounting portion is bolted to the second slide, and the second mounting portion is connected to a fixed shaft portion; The fixed shaft portion is connected to a fixed shaft member, the fixed shaft member is provided with a cylindrical through hole, the cylindrical through hole is provided with a bearing, and the bearing is rotatably connected to the driven shaft; The distance between the axis lines of the cylindrical through holes is the second set value.

9. The double-station finishing equipment for gear pump tooth cavity according to claim 8, characterized in that: The fixed axis portion and the fixed axis member form a mounting surface perpendicular to the first main axis and the second main axis, and a surface of the fixed axis portion opposite to the mounting surface is an inclined surface, so that the vertical cross-section of the fixed axis portion perpendicular to the mounting surface is a trapezoidal shape with a narrow upper portion and a wide lower portion; The fixed axis portion is provided with a third through hole perpendicular to the mounting surface, and one end of the third through hole close to the mounting surface is provided with a step; The fixed shaft member is engaged with the third through hole, and a second extension edge is provided at one end of the fixed shaft member close to the mounting surface, and the second extension edge is engaged with the step; When the fixed axis member is engaged with the third through hole, the distance between the axis of the cylindrical through hole and the adjacent axis of the first main shaft is the first set value; The fixed shaft member is connected to the fixed shaft portion by bolts via the second extension edge.

10. The double-station finishing equipment for gear pump tooth cavity according to claim 1, characterized in that: Two parallel slide rails are provided between the first spindle box and the second spindle box; Two sliding blocks are provided between the two ends of each of the first slide and the second slide and the slide rail.

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