Clamping clamp for machining scroll plate

Abstract

The clamping fixture for machining the scroll plate is characterized by comprising a fixture body, an expansion sleeve seat and a center expansion sleeve, a mounting groove used for mounting the expansion sleeve seat is formed in the lower end of the fixture body, and the expansion sleeve seat is detachably connected into the mounting groove through an expansion sleeve seat screw; the center expansion sleeve is installed on the top of the expansion sleeve base and communicated with the expansion sleeve base, a datum hole is formed in the position, opposite to the center expansion sleeve, in the upper end of the clamp body, the center expansion sleeve stretches out of the clamp body along the datum hole, and the center expansion sleeve expands under the action of hydraulic oil in the expansion sleeve base. And the center expansion sleeve expands the to-be-processed scroll plate while extruding the reference hole. The to-be-machined scroll plate is tensioned through expansion of the center expansion sleeve, deformation of the scroll plate can be greatly reduced through the fixing mode, stress is uniform when the scroll plate is fixed, and the machining yield of the scroll plate is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of processing a scroll disk in an automobile air-conditioning compressor, and in particular to a clamping fixture for processing the scroll disk. Background Art

[0002] In recent years, with the development of new energy vehicles, the requirements for the machining accuracy of the scroll disk, the core part of the new energy air-conditioning scroll compressor, have been increasing. However, the scroll disk is a thin-walled part, and various fixtures on the market will cause deformation of the part. It is difficult to improve the contour of the part after it approaches 10 microns. Therefore, in order to solve this problem, it is particularly important to design a clamping fixture for machining the scroll disk. Summary of the invention

[0003] In order to solve the above problems, the present invention designs a clamping fixture for processing a scroll disk, which tightens the scroll disk to be processed by expanding the center expansion sleeve. This fixing method can greatly reduce the deformation of the scroll disk, and the force on the scroll disk is relatively uniform when it is fixed, thereby greatly improving the processing yield of the scroll disk.

[0004] In order to solve the above-mentioned technical problems, the present invention provides a clamping fixture for processing a vortex disk, characterized in that it includes a clamp body, an expansion sleeve seat and a center expansion sleeve, the lower end of the clamp body is provided with an installation groove for installing the expansion sleeve seat, the expansion sleeve seat is detachably connected to the installation groove by the expansion sleeve seat screw, the center expansion sleeve is installed on the top of the expansion sleeve seat and is connected with it, a reference hole is provided in the upper end of the clamp body relative to the position of the center expansion sleeve, the center expansion sleeve extends out of the clamp body along the reference hole, the center expansion sleeve expands under the action of the hydraulic oil in the expansion sleeve seat, and the center expansion sleeve tightens the vortex disk to be processed while squeezing the reference hole, the right end face of the clamp body is provided with a negative pressure interface for connecting a negative pressure pipeline, and the negative pressure interface is connected with a negative pressure suction port opened on the top of the clamp body through a first flow channel opened in the clamp body.

[0005] Further: the clamp body is composed of a convex-shaped seat body, a support panel arranged on the upper end surface of the convex-shaped seat body, and a circular mounting plate arranged on the top of the support panel. The circular mounting plate, the support panel and the convex-shaped seat body are connected as a whole from top to bottom in sequence. The shape of the support panel matches the upper end surface of the convex-shaped seat body, the diameter of the circular mounting plate matches the width of the support panel, the negative pressure interface is arranged on the right end surface of the convex-shaped seat body, and the negative pressure suction port is opened on the top of the circular mounting plate.

[0006] Furthermore: a first flow channel for the upward and downward flow of hydraulic oil is provided inside the expansion sleeve seat, an oil inlet connected to the first flow channel is provided on the side wall of the expansion sleeve seat, the lower end of the first flow channel is sealed by a expansion sleeve seat sealing plug detachably connected to the bottom of the expansion sleeve seat, a second flow channel is provided in the convex-shaped seat body, one end of the second flow channel is connected to the mounting groove and faces the oil inlet, and a hydraulic upper seal and a hydraulic lower seal are respectively provided in the mounting grooves on the upper and lower sides of the oil inlet.

[0007] Furthermore, a hydraulic push rod screw is connected to the front end surface of the convex seat body, and the hydraulic push rod screw extends into the second circulation channel by rotation to squeeze the hydraulic oil in the second circulation channel into the first flow channel.

[0008] Furthermore: a hydraulic gauge interface is arranged on the left end surface of the convex-shaped seat body, the convex-shaped seat body is connected to a hydraulic gauge via the hydraulic gauge interface, and the hydraulic gauge is communicated with the second circulation channel.

[0009] Furthermore: a second flow channel is opened inside the center expansion sleeve, the lower end of the second flow channel is connected to the upper end of the first flow channel, the upper end of the second flow channel is sealed by a expansion sleeve sealing screw connected to the top of the center expansion sleeve, an O-ring is arranged between the lower end surface of the center expansion sleeve and the upper end surface of the expansion sleeve seat, and a cavity for tightening after hydraulic oil is injected is also opened inside the center expansion sleeve, and the cavity is connected to the second flow channel.

[0011] Furthermore: a circular positioning column and two prismatic positioning columns are arranged on the top of the circular mounting plate, and the circular positioning column and the two prismatic positioning columns are arranged in a regular triangle.

[0012] Furthermore: a first plastic limit block and a second plastic limit block are arranged on the circular mounting plate between the circular positioning column and a prismatic positioning column.

[0013] After adopting the above structure, the beneficial effects of the present invention are as follows:

[0014] 1. The present invention tightens the scroll disk to be processed by expanding the center expansion sleeve. This fixing method can greatly reduce the deformation of the scroll disk, and the force applied to the scroll disk is relatively uniform when the scroll disk is fixed, which greatly improves the processing yield of the scroll disk.

[0015] 2. When the scroll disk is tensioned and clamped, the present invention can further fix the scroll disk through negative pressure, thereby improving the stability of clamping.

[0016] 3. The present invention also provides a positioning column and a plastic limit block. This design facilitates the positioning of the scroll disk before processing, so that the center expansion sleeve can clamp the scroll disk more directly and accurately, thereby increasing practical performance.

[0017] 4. The whole set of clamps used in the present invention has low manufacturing cost and good expansibility. The hydraulic station can be used to replace the hydraulic push rod screw for pressurization, thereby achieving the purpose of automatic clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a usage state diagram of the present invention.

[0020] Figure 2 It is a three-dimensional structural diagram of the present invention.

[0021] Figure 3 It is a top view of the structure of the present invention.

[0022] Figure 4 for Figure 3 Cross-sectional view along DD.

[0023] In the figure: 1 is the clamp body, 1-1 is the convex seat body, 1-2 is the support panel, 1-3 is the circular mounting plate, 2 is the expansion sleeve seat, 2-1 is the first flow channel, 3 is the center expansion sleeve, 3-1 is the second flow channel, 3-2 is the cavity, 4 is the expansion sleeve sealing screw, 5 is the O-ring, 6 is the hydraulic upper seal, 7 is the hydraulic lower seal, 8 is the expansion sleeve seat sealing plug, 10 is the first plastic limit block, 11 is the second plastic limit block, 12 is the hydraulic push rod screw, 13 is the hydraulic gauge interface, 14 is the negative pressure interface, 15 is the negative pressure suction port, 16 is the hydraulic gauge, 17 is the circular positioning column, and 18 is the prismatic positioning column. DETAILED DESCRIPTION

[0024] like Figure 1 , Figure 2 , Figure 3 and Figure 4A clamping fixture for processing a scroll disk is shown, comprising a fixture body 1, an expansion sleeve seat 2 and a center expansion sleeve 3. A mounting groove for installing the expansion sleeve seat is provided in the lower end of the fixture body. The expansion sleeve seat is detachably connected to the mounting groove through the expansion sleeve seat screw. The center expansion sleeve is installed on the top of the expansion sleeve seat and communicated with the expansion sleeve seat. A reference hole is provided in the upper end of the fixture body relative to the position of the center expansion sleeve. The center expansion sleeve extends out of the fixture body along the reference hole. The center expansion sleeve expands under the action of the hydraulic oil in the expansion sleeve seat. The center expansion sleeve tightens the scroll disk to be processed while squeezing the reference hole. A negative pressure interface 14 for connecting a negative pressure pipeline is provided on the right end face of the fixture body. The negative pressure interface is connected to a negative pressure suction port 15 provided on the top of the fixture body through a first flow channel provided in the fixture body. When clamping, the scroll disk to be processed is first placed on the fixture body, and the scroll disk is first tensioned by the expansion of the center expansion sleeve, and then further fixed by negative pressure. The present invention tightens the scroll disk to be processed by expanding the central expansion sleeve. This fixing method can greatly reduce the deformation of the scroll disk, and the force applied to the scroll disk when it is fixed is relatively uniform, and the processing yield rate of the scroll disk is greatly improved. In addition, when tightening and clamping the scroll disk, the present invention can further fix the scroll disk by negative pressure, thereby improving the stability of clamping.

[0025] like Figure 2 The clamp body shown is composed of a convex-shaped seat body 1-1, a support panel 1-2 arranged on the upper end surface of the convex-shaped seat body, and a circular mounting plate 1-3 arranged on the top of the support panel. The circular mounting plate, the support panel and the convex-shaped seat body are sequentially connected together from top to bottom, the shape of the support panel matches the upper end surface of the convex-shaped seat body, the diameter of the circular mounting plate matches the width of the support panel, the negative pressure interface is arranged on the right end surface of the convex-shaped seat body, and the negative pressure suction port is opened on the top of the circular mounting plate.

[0026] like Figure 4 The expansion sleeve seat shown in the figure is provided with a first flow channel 2-1 for the upward and downward flow of hydraulic oil, and the side wall of the expansion sleeve seat is provided with an oil inlet connected to the first flow channel, and the lower end of the first flow channel is sealed by a expansion sleeve seat sealing plug 8 detachably connected to the bottom of the expansion sleeve seat, and a second flow channel is provided in the convex-shaped seat body, one end of the second flow channel is connected to the mounting groove and faces the oil inlet, and a hydraulic upper seal 6 and a hydraulic lower seal 7 are respectively provided in the mounting grooves on the upper and lower sides of the oil inlet.

[0027] like Figure 1 and Figure 4The front end face of the convex-shaped seat body is connected with a hydraulic push rod screw 12, which extends into the second circulation channel by rotation to squeeze the hydraulic oil in the second circulation channel into the first flow channel; a hydraulic gauge interface 13 is arranged on the left end face of the convex-shaped seat body, and the convex-shaped seat body is connected to a hydraulic gauge 16 through the hydraulic gauge interface, and the hydraulic gauge is connected to the second circulation channel. The present invention controls the internal oil pressure in the second circulation channel by controlling the depth of the hydraulic push rod screw extending into the second circulation channel, thereby controlling the tensioning force of the center expansion sleeve, thereby preventing the vortex disk from being subjected to excessive clamping force and causing excessive deformation, thereby protecting the vortex disk during the clamping process. The whole set of clamps used in the present invention has low manufacturing cost and good expansibility, and can be pressurized by a hydraulic station instead of the hydraulic push rod screw, thereby achieving the purpose of automatic clamping.

[0028] like Figure 4 The center expansion sleeve shown in the figure has a second flow channel 3-1 opened inside, the lower end of the second flow channel is connected to the upper end of the first flow channel, the upper end of the second flow channel is sealed by a sleeve sealing screw 4 connected to the top of the center expansion sleeve, an O-ring 5 is arranged between the lower end surface of the center expansion sleeve and the upper end surface of the expansion sleeve seat, and the center expansion sleeve also has a cavity 3-2 opened inside for tightening after hydraulic oil is injected, and the cavity is connected to the second flow channel.

[0029] like Figure 2 and Figure 3 A circular positioning column 17 and two prismatic positioning columns 18 are arranged on the top of the circular mounting plate, and the circular positioning column and the two prismatic positioning columns are arranged in an equilateral triangle; a first plastic stopper 10 and a second plastic stopper 11 are arranged on the circular mounting plate between the circular positioning column and the prismatic positioning column. The present invention also provides a positioning column and a plastic stopper, and this design facilitates the positioning of the scroll disk before processing, so that the center expansion sleeve can clamp the scroll disk more directly and accurately, which plays a role in increasing practical performance.

[0030] The specific steps of its use during operation are as follows: manually tighten the hydraulic push rod screw to push the hydraulic pressure, and the hydraulic pressure expands the center expansion sleeve through the internal channel. The expansion sleeve expands evenly, squeezes the reference hole of the fixture body, and tightens the parts at the same time. Monitor the data on the interface of the hydraulic meter to ensure that the expansion sleeve does not over-extrude the workpiece. Stop pressurizing immediately after the workpiece is stressed, and use this pressure directly for the next processing. The positioning column ensures the angular positioning of the workpiece, and then turns on the negative pressure to absorb the part. After the part is clamped, it can be processed and cut.

[0031] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

1. A clamping fixture for processing a scroll disk, characterized in that: The invention comprises a fixture body (1), an expansion sleeve seat (2) and a center expansion sleeve (3), wherein a mounting groove for mounting the expansion sleeve seat is provided in the lower end of the fixture body, the expansion sleeve seat is detachably connected to the mounting groove by means of expansion sleeve seat screws, the center expansion sleeve is mounted on the top of the expansion sleeve seat and is connected thereto, a reference hole is provided in the upper end of the fixture body relative to the position of the center expansion sleeve, the center expansion sleeve extends out of the fixture body along the reference hole, the center expansion sleeve expands under the action of hydraulic oil in the expansion sleeve seat, the center expansion sleeve tightens the vortex disk to be processed while squeezing the reference hole, the right end face of the fixture body is provided with a negative pressure interface (14) for connecting a negative pressure pipeline, the negative pressure interface is connected to a negative pressure air intake port (15) provided on the top of the fixture body through a first flow channel provided in the fixture body.

2. A clamping fixture for processing a scroll disk according to claim 1, characterized in that: The clamp body is composed of a convex-shaped seat body (1-1), a support panel (1-2) arranged on the upper end surface of the convex-shaped seat body, and a circular mounting plate (1-3) arranged on the top of the support panel. The circular mounting plate, the support panel and the convex-shaped seat body are sequentially connected from top to bottom. The shape of the support panel matches the upper end surface of the convex-shaped seat body, the diameter of the circular mounting plate matches the width of the support panel, the negative pressure interface is arranged on the right end surface of the convex-shaped seat body, and the negative pressure suction port is opened on the top of the circular mounting plate.

3. A clamping fixture for machining a scroll disk according to claim 2, characterized in that: The expansion sleeve seat is provided with a first flow channel (2-1) for the hydraulic oil to flow up and down inside, and an oil inlet connected to the first flow channel is provided on the side wall of the expansion sleeve seat. The lower end of the first flow channel is sealed by a expansion sleeve seat sealing plug (8) detachably connected to the bottom of the expansion sleeve seat. A second flow channel is provided in the convex-shaped seat body, and one end of the second flow channel is connected to the installation groove and faces the oil inlet. A hydraulic upper seal (6) and a hydraulic lower seal (7) are also provided in the installation grooves on the upper and lower sides of the oil inlet, respectively.

4. A clamping fixture for processing a scroll disk according to claim 3, characterized in that: A hydraulic push rod screw (12) is connected to the front end surface of the convex seat body, and the hydraulic push rod screw extends into the second circulation channel by rotation to squeeze the hydraulic oil in the second circulation channel into the first flow channel.

5. The clamping fixture for processing a scroll disk according to claim 4, characterized in that: A hydraulic gauge interface (13) is arranged on the left end surface of the convex-shaped seat body, and the convex-shaped seat body is connected to a hydraulic gauge (16) via the hydraulic gauge interface, and the hydraulic gauge is connected to the second circulation channel.

6. The clamping fixture for processing a scroll disk according to claim 3, characterized in that: A second flow channel (3-1) is provided inside the central expansion sleeve, the lower end of the second flow channel is connected to the upper end of the first flow channel, the upper end of the second flow channel is sealed by a sleeve sealing screw (4) connected to the top of the central expansion sleeve, an O-ring (5) is provided between the lower end surface of the central expansion sleeve and the upper end surface of the expansion sleeve seat, and a cavity (3-2) for tightening after hydraulic oil is injected is also provided inside the central expansion sleeve, and the cavity is connected to the second flow channel.

7. The clamping fixture for processing a scroll disk according to claim 2, characterized in that: A circular positioning column (17) and two prism-shaped positioning columns (18) are arranged on the top of the circular mounting plate, and the circular positioning column and the two prism-shaped positioning columns are arranged in an equilateral triangle.

8. The clamping fixture for machining a scroll disk according to claim 7, characterized in that: A first plastic limiting block (10) and a second plastic limiting block (11) are arranged on a circular mounting plate between the circular positioning column and a prismatic positioning column.

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